FIELD
[0001] The present disclosure relates to a field of pumping technology, more particularly
to a centrifugal pump.
BACKGROUND
[0002] In the related art, a heating device and a pumping device are usually provided in
a case of fluids to be heated and then pumped, which makes an apparatus have complex
structure, large volume and low space utilization rate. Thus, an apparatus where a
heating device is completely or partially buried in a pump housing to combine the
heating device with a pumping device emerges, but the heater can only be machined
into a regular circle, such that the pump housing cannot be designed in a spiral shape,
and hydraulic performance is poor.
SUMMARY
[0003] The present disclosure seeks to solve at least one of the problems existing in the
related art. For this reason, the present disclosure provides a centrifugal pump that
has a simple structure, good hydraulic performance and high heating efficiency.
[0004] The centrifugal pump according to embodiments of the present disclosure includes:
a pump housing, internally defining a heating chamber and a pump chamber in communication
with the heating chamber, and provided with an inlet in communication with the heating
chamber and an outlet in communication with the pump chamber; a heating device, provided
on the pump housing; a flow guide member, provided in the heating chamber and defining
a spreading channel and a converging channel in the heating chamber, the spreading
channel being configured to guide fluid entering through the inlet to spread outwards
along a radial direction of the heating device, and a the converging channel being
configured to guide the spread fluid to converge inwards along the radial direction
of the heating device to the pump chamber; and an impeller, provided within the pump
chamber and configured to guide the fluid converged in the pump chamber to the outlet.
[0005] For the centrifugal pump according to embodiments of the present disclosure, the
structure of the centrifugal pump is compact, and the volume thereof is small, thereby
improving a space utilization rate. Meanwhile, since the heating device does not interfere
with the shape design of the pump housing surrounding the impeller, the pump housing
surrounding the impeller can be designed in a spiral shape, so as to achieve good
hydraulic performance. Additionally, the loss due to curves of the fluid entering
via the inlet is reduced, and the fluid can be sufficiently heated by the heating
device, so as to improve the heating efficiency of the fluid.
[0006] According to some embodiments of the present disclosure, the spreading channel guides
the fluid entering through the inlet to spread spirally outwards along the radial
direction of the heating device, and the converging channel guides the spread fluid
to converge spirally inwards along the radial direction of the heating device to the
pump chamber.
[0007] According to some embodiments of the present disclosure, the flow guide member includes:
a separating plate; a plurality of spiral vanes provided at a side of the separating
plate facing the heating device, and defining the spreading channel at the side of
the separating plate facing the heating device; and a plurality of reverse spiral
vanes provided at another side of the separating plate facing the pump chamber, and
defining the converging channel at the another side of the separating plate facing
the pump chamber.
[0008] According to some further embodiments of the present disclosure, one kind of the
spiral vanes and the reverse spiral vanes is shifted clockwise from inside to outside
along a radial direction of the separating plate, while the other one thereof is shifted
counterclockwise from inside to outside along the radial direction of the separating
plate.
[0009] According to some embodiments of the present disclosure, the plurality of reverse
spiral vanes are connected to a bottom wall of the heating chamber, the plurality
of spiral vanes are connected to the separating plate, and the separating plate is
supported on the plurality of reverse spiral vanes.
[0010] Optionally, the plurality of reverse spiral vanes are integrally formed on the pump
housing, and the plurality of spiral vanes are integrally formed on the separating
plate.
[0011] Optionally, the separating plate is provided with a positioning hole, the reverse
spiral vane is provided with a positioning column, and the positioning column is fitted
in the positioning hole.
[0012] Preferably, a plurality of positioning columns are provided and disposed to inner
ends of corresponding reverse spiral vanes, a plurality of positioning holes are provided
and spaced along a circumferential direction of the separating plate, and the plurality
of positioning columns are fitted in the plurality of positioning holes respectively.
[0013] In some other embodiments of the present disclosure, the plurality of reverse spiral
vanes and the plurality of spiral vanes are connected to the separating plate, and
the plurality of reverse spiral vanes are supported on a bottom wall of the heating
chamber.
[0014] Further, the plurality of reverse spiral vanes, the plurality of spiral vanes and
the separating plate are integrally formed.
[0015] In a specific embodiment of the present disclosure, the pump housing has an inlet
pipe extending into the heating chamber, the inlet is provided in the inlet pipe,
inner ends of the spiral vanes are provided with engaging notches, and an end of the
inlet pipe that extends into the heating chamber is fitted in the engaging notches
of the plurality of spiral vanes.
[0016] In an optional embodiment of the present disclosure, a side surface of the separating
plate facing the heating device is provided with a flow guide block in a center of
the side surface, and the flow guide block is configured to guide the fluid entering
through the inlet to the plurality of spiral vanes.
[0017] Further, the flow guide block is conical, and a vertex of the flow guide block is
rounded off.
[0018] In some embodiments of the present disclosure, an outer peripheral edge of the separating
plate is more adjacent to the heating device compared with that the outer peripheral
edge of the separating plate is adjacent to the pump chamber, and a center of the
separating plate is more adjacent to the pump chamber compared with that the center
of the separating plate is adjacent to the heating device.
[0019] According to some embodiments of the present disclosure, a central axis of the inlet,
a central axis of the pump housing, a central axis of the heating device, a central
axis of the flow guide member, and a central axis of the impeller coincide with each
other; the heating chamber and the pump chamber are communicated at the central axis
of the pump housing; the outlet is provided in an outer peripheral wall of the pump
housing, and a central axis of the outlet is tangent to the outer peripheral wall
of the pump housing.
[0020] According to some embodiments of the present disclosure, the pump housing includes:
a housing body, the heating chamber and the pump chamber being defined in the housing
body, and the outlet being provided in the housing body; a casing body, detachably
mounted to the housing body and pressing the heating device to an upper end of the
housing body; and an inlet pipe, the inlet pipe being provided on the casing body,
and the inlet being provided in the inlet pipe.
[0021] According to some embodiments of the present disclosure, the heating device is configured
as an annular heating plate having a central through hole, and a position of the central
through hole corresponds to a position of the inlet in a vertical direction.
[0022] According to some embodiments of the present disclosure, at least one of an upper
surface and an outer peripheral surface of the heating device is provided with a resistance
coating.
[0023] According to some embodiments of the present disclosure, a seal ring is provided
between an inner peripheral edge of the heating device and the pump housing for sealing,
and another seal ring is provided between an outer peripheral edge of the heating
device and the pump housing for sealing, and a thermal insulation member is provided
between the inner peripheral edge and/or the outer peripheral edge of the heating
device and the corresponding seal ring.
[0024] According to some embodiments of the present disclosure, the centrifugal pump further
includes: a terminal box, provided on the heating device; and a wiring terminal, provided
in the terminal box, electrically coupled with the heating device, and exposed out
of the pump housing.
[0025] Additional aspects and advantages of embodiments of present disclosure will be given
in part in the following descriptions, become apparent in part from the following
descriptions, or be learned from the practice of the embodiments of the present disclosure.
BRIEF DESCRIPTION OF THE DRAWINGS
[0026]
Fig. 1 is an exploded view of a centrifugal pump according to an embodiment of the
present disclosure.
Fig. 2 is a perspective view of a centrifugal pump according to an embodiment of the
present disclosure.
Fig. 3 is a front view of a centrifugal pump according to an embodiment of the present
disclosure.
Fig. 4 is a sectional view taken along line A-A in Fig. 3.
Fig. 5 is a left view of a centrifugal pump according to an embodiment of the present
disclosure.
Fig. 6 is a top view of a centrifugal pump according to an embodiment of the present
disclosure.
Fig. 7 is a perspective view of a separating plate and spiral vanes of a flow guide
member of a centrifugal pump according to an embodiment of the present disclosure.
Fig. 8 is a front view of a separating plate and spiral vanes of a flow guide member
of a centrifugal pump according to an embodiment of the present disclosure.
Fig. 9 is a top view of a separating plate and spiral vanes of a flow guide member
of a centrifugal pump according to an embodiment of the present disclosure.
Fig. 10 is an exploded view of a centrifugal pump according to another embodiment
of the present disclosure.
Fig. 11 is a perspective view of a flow guide member of a centrifugal pump according
to another embodiment of the present disclosure.
Fig. 12 is a front view of a flow guide member of a centrifugal pump according to
another embodiment of the present disclosure.
Fig. 13 is a top view of a flow guide member of a centrifugal pump according to another
embodiment of the present disclosure.
Fig. 14 is a sectional view of a pump heater according to a first optional embodiment
of the present disclosure.
Fig. 15 is a perspective view of a casing of the pump heater according to the first
optional embodiment of the present disclosure.
Fig. 16 is a perspective view at a heating plate of the pump heater according to the
first optional embodiment of the present disclosure.
Fig. 17 is a perspective view of a pump heater according to a second optional embodiment
of the present disclosure.
Fig. 18 is a sectional view of the pump heater according to the second optional embodiment
of the present disclosure.
Reference numerals:
[0027]
centrifugal pump 100,
pump housing 1, heating chamber 11, pump chamber 12, inlet pipe 13, inlet 130, housing
body 14, outlet 140,
pump heater 200, casing 21, casing body 211, heating device 22, upper space 201, lower
space 202,
flow guide member 3, separating plate 31, positioning hole 310, flow guide block 311,
spiral vane 32, engaging notch 320, reverse spiral vane 33, positioning column 331,
impeller 4,
seal ring 5, first seal ring 51, second seal ring 52, thermal insulation member 6,
first thermal insulation member 61, second thermal insulation member 62, wiring terminal
7, terminal box 8.
DETAILED DESCRIPTION
[0028] Embodiments of the present disclosure will be described in detail and examples of
the embodiments will be illustrated in the drawings, where same or similar reference
numerals are used to indicate same or similar members or members with same or similar
functions. The embodiments described herein with reference to drawings are explanatory,
and used to generally understand the present disclosure. The embodiments shall not
be construed to limit the present disclosure.
[0029] A centrifugal pump 100 according to embodiments of the present disclosure will be
described with reference to Figs. 1 to 13, and the centrifugal pump 100 is suitable
for various applications, such as fluid transportation, cooling systems and domestic
appliances, and has advantages of a compact structure, a small volume, and good hydraulic
performance.
[0030] As shown in Figs. 1 to 13, the centrifugal pump 100 according to embodiments of the
present disclosure includes a pump housing 1, a heating device 22, a flow guide member
3 and an impeller 4.
[0031] Specifically, the pump housing 1 internally defines a heating chamber 11 and a pump
chamber 12 in communication with the heating chamber 11, and the pump housing 1 is
provided with an inlet 130 in communication with the heating chamber 11 and an outlet
140 in communication with the pump chamber 140. The heating device 22 is disposed
on the pump housing 1 and has at least a part located in the heating chamber 11. For
example, a lower surface of the heating device 22 is formed as a top wall of the heating
chamber 11, such that fluid in the heating chamber 11 can be heated by the heating
device 22. Preferably, the heating device 22 is annular and employs a thick-film resistor
for heating, thereby achieving high heating efficiency. The flow guide member 3 is
disposed within the heating chamber 11, and the flow guide member 3 defines a spreading
channel and a converging channel in the heating chamber 11, in which the spreading
channel guides the fluid entering through the inlet 130 to spread spirally outwards
along a radial direction of the heating device 22, while the converging channel guides
the spread fluid to converge spirally inwards along the radial direction of the heating
device 22 to the pump chamber 12. The impeller 4 is disposed within the pump chamber
12 and guides the fluid converged in the pump chamber 12 to the outlet 140.
[0032] A heating and pumping process in the centrifugal pump 100 according to embodiments
of the present disclosure will be described with reference to the drawings.
[0033] The fluid flows along the spreading channel after entering the heating chamber 11
via the inlet 130, and at this time, the flow of the fluid spreads from inside to
outside along the radial direction of the heating device 22. Afterwards, the fluid
spread by the spreading channel flows into the converging channel, and at this time,
the flow of the fluid converges from outside to inside along the radial direction
of the heating device 22. In such a way, resistance due to curves to the fluid flow
and the resulting fluid loss due to curves are reduced; and since the fluid spreads
outwards along the radial direction of the heating device 22, the fluid can flow through
the lower surface of the heating device 22 and get full contact with the heating device
22, enlarging a heated area of the fluid, and finally, the heated fluid converges
into the pump chamber 12 and then flows to the outlet 140 under the guidance of the
impeller 4.
[0034] For the centrifugal pump 100 according to the embodiments of the present disclosure,
by providing the heating device 22 within the heating chamber 11 and providing the
impeller 4 within the pump chamber 12, a heating function and a pumping function are
integrated, and the centrifugal pump 100 has the compact structure and the small volume,
improving a space utilization rate of the centrifugal pump 100. Furthermore, the flow
guide member 3 enables the heating device 22 not to interfere with a shape design
of the pump housing 1 surrounding the impeller 4, that is, the pump housing 1 surrounding
the impeller 4 can be designed in a spiral shape to enhance the hydraulic performance
of the centrifugal pump 100. Additionally, the flow guide member 3 is employed, not
only the fluid loss due to curves is reduced, but also the fluid can be heated by
the heating device 22 sufficiently, so as to enhance the heating efficiency for the
fluid.
[0035] In an embodiment shown in Figs. 1 and 4, the spreading channel can guide the fluid
entering via the inlet to spread spirally outwards along the radial direction of the
heating device 22, and the converging channel can guide the spread fluid to converge
spirally inwards along the radial direction of the heating device 22 to the pump chamber
12. In other words, the spreading channel can be formed as a spiral spreading channel,
and the converging channel can be formed as a spiral converging channel, so as to
further reduce the fluid loss due to curves, and make the fluid flow through the lower
surface of the heating device 22 more fully, thereby further improving the heating
efficiency of the centrifugal pump 100.
[0036] As shown in Fig. 1 and Figs. 10-12, according to some embodiments of the present
disclosure, the flow guide member 3 can include a separating plate 31, a plurality
of spiral vanes 32 and a plurality of reverse spiral vanes 33. The plurality of spiral
vanes 32 are disposed at a side of the separating plate 31 facing the heating device
22 (e.g. an upper side of the separating plate 31 illustrated in the drawings), and
the plurality of spiral vanes 32 define the spreading channel at the upper side of
the separating plate 31. The plurality of reverse spiral vanes 33 are disposed at
another side of the separating plate 31 facing the pump chamber 12 (e.g. a lower side
of the separating plate 31 illustrated in the drawings), and the plurality of reverse
spiral vanes 33 define the converging channel at the lower side of the separating
plate 31. Thus, the entering fluid via the inlet 130 spreads spirally outwards along
the radial direction of the heating device 22 under the guidance of the spreading
channel, and the spread fluid flows into the converging channel individually, thereby
further enhancing the heating efficiency of the fluid.
[0037] In a further embodiment of the present disclosure, one kind of the spiral vanes 32
and the reverse spiral vanes 33 can be shifted clockwise outwards from inside to outside
along a radial direction of the separating plate 31, and the other one thereof can
be shifted counterclockwise from inside to outside along the radial direction of the
separating plate 31, such that the fluid can spread spirally from inside to outside
under the guidance of the spreading channel and converge spirally from outside to
inside under the guidance of the converging channel, and the spread fluid has a reduced
loss due to curves at a junction of the spreading channel and the converging channel.
For example, as illustrated in Fig. 1, the spiral vanes 32 can be shifted clockwise
from inside to outside along the radial direction of the separating plate 31, and
the reverse spiral vanes 33 can be shifted counterclockwise from inside to outside
along the radial direction of the separating plate 31. Certainly, it is also possible
that the spiral vanes 32 are shifted counterclockwise from inside to outside along
the radial direction of the separating plate 31, and the reverse spiral vanes 33 are
shifted clockwise from inside to outside along the radial direction of the separating
plate 31.
[0038] As illustrated in Figs. 1, 4, 7 and 9, in some embodiments of the present disclosure,
the plurality of reverse spiral vanes 33 can be connected to a bottom wall of the
heating chamber 11, the plurality of spiral vanes 32 can be connected to the separating
plate 31, and the separating plate 31 is supported on the plurality of reverse spiral
vanes 33, that is, the flow guide member 3 has a split structure, such that the flow
guide member 3 can be mounted and positioned in the heating chamber 11.
[0039] Optionally, as illustrated in Fig. 1, the plurality of reverse spiral vanes 33 can
be integrally formed on the pump housing 1, and the plurality of spiral vanes 32 are
integrally formed on the separating plate 31, so as to further simplify the structure
of the centrifugal pump 100 and shorten an assembly process of the flow guide member
3.
[0040] Optionally, as illustrated in Fig. 1 and Figs. 7-9, the separating plate 31 can define
a positioning hole 310, the reverse spiral vane 33 can be provided with a positioning
column 331, and the positioning column 331 is fitted in the positioning hole 310,
such that the separating plate 31 can be firmly supported on the reverse spiral vane
33. For example, as illustrated in the drawings, the positioning column 331 can be
formed in the shape of a substantially rectangular parallelepiped, while the positioning
hole 310 can be formed as a substantially rectangular hole, so as to facilitate the
processing. Certainly, the positioning column 331 can also be a long cylinder, and
the positioning hole 310 can be formed as a circular hole, which will not be particularly
defined, as long as the positioning column 331 and the positioning hole 310 can be
fitted together.
[0041] As preferred, a plurality of positioning columns 331 can be provided and disposed
to respective inner ends of corresponding reverse spiral vanes 33, a plurality of
positioning holes 310 can be provided and spaced along a circumferential direction
of the separating plate 31, and the plurality of positioning columns 331 are fitted
in the plurality of positioning holes 310 respectively, so that the connection between
the separating plate 31 and the reverse spiral vane 33 is firmer. For example, as
illustrated in Fig. 1, only one of two adjacent reverse spiral vanes 33 is provided
with the positioning column 331, that is, the two adjacent positioning columns 331
are spaced apart by one reverse spiral vane 33 without the positioning column 331.
The plurality of positioning holes 310 corresponding to the plurality of positioning
columns 331 are distributed and spaced along the circumferential direction of the
separating plate 31, so as to facilitate the connection between the separating plate
31 and the reverse spiral vane 33.
[0042] In some other embodiments as shown in Figs. 10-13, the plurality of reverse spiral
vanes 33 and the plurality of spiral vanes 32 are connected to the separating plate
31, and the plurality of reverse spiral vanes 33 are supported on the bottom wall
of the heating chamber 11, that is, the flow guide member 3 is an integral piece,
thereby facilitating the assembly of the flow guide member 3. Preferably, as illustrated
in Fig. 11, the plurality of reverse spiral vanes 33, the plurality of spiral vanes
32, and the separating plate 31 can be integrally formed, so as to simplify a production
process of the flow guide member 3 and improve assembly efficiency of the centrifugal
pump 100.
[0043] As illustrated in Figs. 1 to 6, in a specific embodiment of the present disclosure,
the pump housing 1 has an inlet pipe 13 with the inlet 130 provided in the inlet pipe
13, a lower end of the inlet pipe 13 extends into the heating chamber 11, an inner
end of the spiral vane 32 is provided with an engaging notch 320, and the lower end
of the inlet pipe 13 is fitted in the engaging notches 320 of the plurality of spiral
vanes 32. For example, as illustrated in Fig. 7, the engaging notch 320 can run through
an inner end face of the spiral vane 32, such that the inlet pipe 13 can be fitted
in the engaging notches 320 of the plurality of spiral vanes 32 more stably.
[0044] In optional embodiments shown in Figs. 1, 4, 7 and 10-11, a side surface of the separating
plate 31 facing the heating device 22 (an upper surface of the separating plate 31
as shown in the drawings) can be provided with a flow guide block 311 in a center
of the side surface, such that the fluid entering through the inlet 130 can flow to
the plurality of spiral vanes 32 under the guidance of the flow guide block 311. Preferably,
the flow guide block 311 can be conical, and a vertex of the flow guide block 311
is rounded off, such the fluid can be dispersed around the flow guide block 311 when
falling onto the vertex of the flow guide block 311, and hence the fluid can flow
into the spreading channel smoothly.
[0045] In some embodiments of the present disclosure, an outer peripheral edge of the separating
plate 31 is more adjacent to the heating device 22 compared with that the outer peripheral
edge of the separating plate 31 is adjacent to the pump chamber 12, and a center of
the separating plate 31 is more adjacent to the pump chamber 12 compared with that
the center of the separating plate 31 is adjacent to the heating device 22, that is,
the separating plate 31 is funnel-shaped. For example, as illustrated in Figs. 4,
8 and 12, the separating plate 31 is recessed downwards and inwards along the radial
direction, the outer peripheral edge of the separating plate 31 is located above the
center of the separating plate 31, and a longitudinal section of the separating plate
31 forms a substantially tapered face, such that the fluid can be fully heated by
the heating device 22, thereby further enhancing the heating efficiency of the fluid.
Certainly, it could be understood that the separating plate 31 can also extend along
a horizontal direction, such that the separating plate 31 has a simple structure and
is easy to produce and process.
[0046] As illustrated in Fig. 4, according to some embodiments of the present disclosure,
a central axis of the inlet 130, a central axis of the pump housing 1, a central axis
of the heating device 22, a central axis of the flow guide member 3 and a central
axis of the impeller 4 are oriented along an up-and-down direction and coincide with
each other. The heating chamber 11 is located above the pump chamber 12, and the heating
chamber 11 and the pump chamber 12 are communicated at the central axis of the pump
housing 1. Therefore, the structure of the centrifugal pump 100 is simplified, the
volume thereof is reduced, and the hydraulic performance thereof is excelled. Referring
to Fig. 6, the outlet 140 can be provided in an outer peripheral wall of the pump
housing 1, a central axis of the outlet 140 is tangent to the outer peripheral wall
of the pump housing 1, and in such a case the pump housing 1 surrounding the impeller
4 is designed in a spiral shape, thereby further improving the hydraulic performance
of the centrifugal pump 100.
[0047] According to some embodiments of the present disclosure, the pump housing 1 can include
a housing body 14, a casing body 211, and an inlet pipe 13. The heating chamber 11
and the pump chamber 12 are defined in the housing body 14, and the outlet 140 is
provided in the housing body 14. The casing body 211 is detachably mounted to the
housing body 14 and presses the heating device 22 to an upper end of the housing body
14. The inlet pipe 13 is provided on the casing body 211, and the inlet 130 is provided
in the inlet pipe 13. In such a way, various components of the centrifugal pump 100
can be assembled and disassembled conveniently. For example, as illustrated in Figs.
1-4 and Fig. 10, the heating device 22 is located at the upper end of the housing
body 14, the casing body 211 is pressed on an upper surface of the heating device
22, and the heating chamber 11 is located above the pump chamber 12, such that the
fluid flows into the pump chamber 12 under the action of gravity after heated by the
heating device 22. It could be understood that the casing body 211 can be structurally
fitted with the housing body 14, or can be connected with the housing body 14 by means
of a fastener.
[0048] The centrifugal pump 100 according to a specific embodiment of the present disclosure
will be described with reference to Figs. 1-9, and it could be understood that the
following description is only explanatory and is not constructed to limit the present
disclosure.
[0049] As illustrated in Figs. 1-9, the centrifugal pump 100 according the embodiment of
the present disclosure includes the pump housing 1, the heating device 22, the flow
guide member 3 and the impeller 4.
[0050] Specifically, the pump housing 1 includes the housing body 14, the casing body 211
and the inlet pipe 13. The heating chamber 11 and the pump chamber 12 are defined
within the housing body 14, the heating chamber 11 is located above the pump chamber
12, and the heating chamber 11 and the pump chamber 12 are communicated at a central
axis of the housing body 14. The casing body 211 is provided with the inlet pipe 13,
the inlet 130 is defined in the inlet pipe 13, and the lower end of the inlet pipe
13 extends into the heating chamber 11. An outer peripheral wall of the housing body
14 is provided with the outlet 140 in communication with the pump chamber 12, and
the central axis of the outlet 140 is tangent to the outer peripheral wall of the
housing body 14.
[0051] As illustrated in Fig. 4, the heating device 22 is pressed to the upper end of the
housing body 14 by the casing body 211, the lower surface of the heating device 22
is formed as the top wall of the heating chamber 11, and a seal ring 5 is provided
between the heating device 22 and the housing body 14 for sealing, and another seal
ring is provided between the housing body 14 and the casing body 211 for sealing.
The flow guide member 3 is disposed within the heating chamber 11 and located below
the heating device 22, and the flow guide member 3 includes the separating plate 31,
a plurality of spiral vanes 32 and a plurality of reverse spiral vanes 33. As illustrated
in Figs. 4 and 8, the separating plate 31 is recessed downwards and inwards along
the radial direction, the outer peripheral edge of the separating plate 31 is located
above the center of the separating plate 31, a plurality of positioning holes 310
are provided and spaced along the circumferential direction of the separating plate
31, a conical guide flow block 311 is provided at the center of the upper surface
of the separating plate 31, and the vertex of the flow guide block 311 is rounded
off.
[0052] As illustrated in Figs. 4 and 7, the plurality of spiral vanes 32 are provided on
the upper side of the separating plate 31 and integrally formed with the separating
plate 31. The spiral vanes 32 are shifted clockwise from inside to outside along the
radial direction of the separating plate 31 and define the spreading channel in the
upper side of the separating plate 31. The inner ends of the spiral vanes 32 are provided
with the engaging notches 320, and the lower end of the inlet pipe 13 is fitted in
the engaging notches 320 of the plurality of spiral vanes 32. Thus, the inlet pipe
13 is fitted with the flow guide member 3.
[0053] As illustrated in Figs. 1 and 4, the plurality of reverse spiral vanes 33 are provided
to the lower side of the separating plate 31 and integrally formed with the housing
body 14. The reverse spiral vanes 33 are shifted counterclockwise from inside to outside
along the radial direction of the separating plate 31 and define the converging channel
in the lower side of the separating plate 31. Only one of two adjacent reverse spiral
vanes 33 is provided with the positioning column 331, and a plurality of positioning
columns 331 are fitted in a plurality of positioning holes 310 correspondingly. Thus,
the separating plate 31 is supported on the plurality of reverse spiral vanes 33,
and hence the flow guide member 3 is mounted on the housing body 14.
[0054] As illustrated in Fig. 4, the impeller 4 is disposed within the pump chamber 12,
the fluid converging in the pump chamber 12 flows to the outlet 140 under the guidance
of the impeller 4, and the housing body 14 surrounding the impeller 4 has a spiral
shape. The central axis of the inlet 130, the central axis of the housing body 14,
the central axis of the heating device 22, the central axis of the flow guide member
3, and the central axis of the impeller 4 coincide with each other.
[0055] For the centrifugal pump 100 according to the embodiment of the present disclosure,
by providing the heating device 22 within the heating chamber 11 and providing the
impeller 4 within the pump chamber 12, the structure of the centrifugal pump 100 is
compact and the volume thereof is small, achieving an increased space utilization
rate thereof. Meanwhile, the pump housing 1 surrounding the impeller 4 is designed
in the spiral shape, thereby enhancing the hydraulic performance of the centrifugal
pump 100. Additionally, the flow guide member 3 is used to reduce the fluid loss due
to curves, and the fluid can flow through the lower surface of the heating device
22 and make sufficient contact with the heating device 22, such that an outer diameter
of the heating device 22 can match an outer diameter of the pump housing 1 to improve
the heating efficiency of the fluid and reduce an axial size of the centrifugal pump
100.
[0056] The centrifugal pump 100 according to another embodiment of the present disclosure
will be described with reference to Figs. 2-6 and Figs. 10-13, and it could be understood
that the following description is only explanatory and is not constructed to limit
the present disclosure.
[0057] As illustrated in Figs. 2-6 and Figs. 10-13, the centrifugal pump 100 according the
embodiment of the present disclosure includes the pump housing 1, the heating device
22, the flow guide member 3 and the impeller 4.
[0058] Specifically, the pump housing 1 includes the housing body 14, the casing body 211
and the inlet pipe 13. The heating chamber 11 and the pump chamber 12 are defined
within the housing body 14, the heating chamber 11 is located above the pump chamber
12, and the heating chamber 11 and the pump chamber 12 are communicated at the central
axis of the housing body 14. The casing body 211 is provided with the inlet pipe 13,
the inlet 130 is defined in the inlet pipe 13, and the lower end of the inlet pipe
13 extends into the heating chamber 11. The outer peripheral wall of the housing body
14 is provided with the outlet 140 in communication with the pump chamber 12, and
the central axis of the outlet 140 is tangent to the outer peripheral wall of the
housing body 14.
[0059] As illustrated in Fig. 4, the heating device 22 is pressed to the upper end of the
housing body 14 by the casing body 211, the lower surface of the heating device 22
is formed as the top wall of the heating chamber 11, and the seal ring 5 is provided
between the heating device 22 and the housing body 14 for sealing, and also provided
between the housing body 14 and the casing body 211 for sealing. The flow guide member
3 is integrally formed and disposed within the heating chamber 11, and is located
below the heating device 22. The flow guide member 3 includes the separating plate
31, a plurality of spiral vanes 32 and a plurality of reverse spiral vanes 33. As
illustrated in Figs. 4 and 12, the separating plate 31 is recessed downwards and inwards
along the radial direction, the outer peripheral edge of the separating plate 31 is
located above the center of the separating plate 31, a plurality of positioning holes
310 are provided and spaced along the circumferential direction of the separating
plate 31, a conical guide flow block 311 is provided at the center of the upper surface
of the separating plate 31, and the vertex of the flow guide block 311 is rounded
off.
[0060] As illustrated in Figs. 4 and 11, the plurality of spiral vanes 32 are disposed at
the upper side of the separating plate 31. The spiral vanes 32 is are shifted clockwise
outwards from inside to outside along the radial direction of the separating plate
31 and define the spreading channel on the upper side of the separating plate 31,
and the lower end of the inlet pipe 13 is fitted in the engaging notches 320 of the
plurality of spiral vanes 32. Thus, the inlet pipe 13 is fitted with the flow guide
member 3.
[0061] As illustrated in Figs. 10 and 12, the plurality of reverse spiral vanes 33 are disposed
at the lower side of the separating plate 31. The reverse spiral vanes 33 are shifted
counterclockwise from inside to outside along the radial direction of the separating
plate 31 and define the converging channel in the lower side of the separating plate
31, and the plurality of reverse spiral vanes 33 are supported on the housing body
14. Thus, the flow guide member 3 is supported on the housing body 14.
[0062] As illustrated in Figs. 4-6, the impeller 4 is disposed within the pump chamber 12,
the fluid converging in the pump chamber 12 flows to the outlet 140 under the guidance
of the impeller 4, and the housing body 14 surrounding the impeller 4 has a spiral
shape. The central axis of the inlet 130, the central axis of the housing body 14,
the central axis of the heating device 22, the central axis of the flow guide member
3, and the central axis of the impeller 4 coincide with each other, and the heating
chamber 11 is communicated with the pump chamber 12 at the central axis of the housing
body 14.
[0063] For the centrifugal pump 100 according to the embodiment of the present disclosure,
by providing the heating device 22 within the heating chamber 11 and providing the
impeller 4 within the pump chamber 12, the structure of the centrifugal pump 100 is
compact and the volume thereof is small, achieving an increased space utilization
rate thereof. Meanwhile, the pump housing 1 surrounding the impeller 4 is designed
in the spiral shape, thereby enhancing the hydraulic performance of the centrifugal
pump 100. Additionally, with the spreading channel defined by the plurality of spiral
vanes 32 and the converging channel defined by the plurality of reverse spiral vanes
33, the fluid flows along a relatively large turning radius, reducing the fluid loss
due to curve, and the separating plate 31 is recessed downwards and inwards along
the radial direction, improving the heating efficiency for the fluid.
[0064] A pump heater 200 for the centrifugal pump 100 according to embodiments of the present
disclosure will be described with reference to Figs. 1 to 18. The pump heater 200
has advantages of high space utilization rate and high heating efficiency, and will
not interfere with pumping efficiency. The pump heater 200 can be applied to a pumping
and heating device, such as a centrifugal pump.
[0065] As illustrated in Figs. 1-18, the pump heater 200 according to embodiments of the
present disclosure includes a casing 21 and the heating device 22.
[0066] The casing 21 is provided with the inlet 130, the heating device 22 is disposed below
the casing 21 and avoids the inlet 130, for example, the heating device 22 surrounds
the inlet 130. The inlet 130 communicates an upper space 201 of the casing 21 with
a lower space 202 of the heating device 22, and the fluid enters the casing 21 via
the inlet 130 and flows to the lower space 202 of the heating device 22 to be heated
by the heating device 22.
[0067] For the pump heater 200 according to embodiments of the present disclosure, by providing
the heating device 22 below the casing 21 and by employing the heating device 22 to
heat the fluid that flows to its lower space 202, the heated area of the fluid is
enlarged, and space can be utilized sufficiently. Meanwhile, since the heating device
22 avoids the inlet 130, the heating device 22 will not produce hydraulic resistance
to the fluid and avoids affecting the pumping efficiency.
[0068] In conclusion, the pump heater 200 according to embodiments of the present disclosure
has high space utilization rate and high heating efficiency, and will not affect the
pumping efficiency.
[0069] According to some embodiments of the present disclosure, at least one of the upper
surface and an outer peripheral surface of the heating device 22 is provided with
a resistance coating, i.e. at least one of surfaces of the heating device 22 not in
contact with the fluid to be heated is provided with the resistance coating. For example,
the upper surface of the heating device 22 is coated with the resistance coating,
and heat is transferred to the lower surface of the heating device 22 and heats the
fluid in the lower space 202. Certainly, the upper surface and the outer peripheral
surface of the heating device 22 can be both coated with the resistance coating. Preferably,
the resistance coating can be a thick-film resistor.
[0070] As illustrated in Figs. 1, 4, 10, 14, 16 and 18, in some embodiments, the heating
device 22 can be an annular heating plate with a central through hole, and the position
of the central through hole corresponds to that of the inlet 130 in a vertical direction.
For example, a central axis of the central through hole and the central axis of the
inlet 130 both extend along the vertical direction and coincide with each other, and
a diameter of the central through hole is larger than or equal to a diameter of the
inlet 130, such that the heating device 22 will not produce hydraulic resistance to
the fluid at the inlet 130.
[0071] Optionally, as illustrated in Figs. 1, 2, 4, 6, 10, 14, and 16-18, the heating device
22 can be a ring-shaped heating plate, so as to further improve the space utilization
rate and the heating efficiency.
[0072] In some embodiments shown by Figs. 14 and 18, an inner peripheral edge and an outer
peripheral edge of the heating device 22 can be sealed from the casing 21 respectively
to avoid fluid leakage. Specifically, the inner peripheral edge and the outer peripheral
edge of the heating device 22 can be sealed from the casing 21 by means of the seal
ring 5 respectively. For example, the inner peripheral edge of the heating device
22 is sealed from the casing 21 by means of a first seal ring 5, while the outer peripheral
edge of the heating device 22 is sealed from the casing 21 by means of a second seal
ring 5.
[0073] Preferably, a thermal insulation member 6 can be provided between the inner peripheral
edge and/or the outer peripheral edge of the heating device 22 and the corresponding
seal ring 5, such that the seal ring 5 is prevented from contacting the heating device
22 directly, mitigating the impact of the heat generated by the heating device 22
on the seal ring 5. The thermal insulation member 6 can be provided between the inner
peripheral edge of the heating device 22 and the corresponding seal ring 5, or the
thermal insulation member 6 can be provided between the outer peripheral edge of the
heating device 22 and the corresponding seal ring 5. Certainly, the thermal insulation
members 6 can be provided between the inner peripheral edge and the outer peripheral
edge of the heating device 22 and their corresponding seal rings 5 at the same time.
For example, a first thermal insulation member 61 extending along a circumferential
direction of the inner peripheral edge is welded to the inner peripheral edge of the
heating device 22, and a second thermal insulation member 62 extending along a circumferential
direction of the outer peripheral edge is welded to the outer peripheral edge of the
heating device 22. The first thermal insulation member 61 is located between the inner
peripheral edge of the heating device 22 and the first seal ring 51, and the first
seal ring 51 seals a gap between the first thermal insulation member 61 and the casing
21. The second thermal insulation member 62 is located between the outer peripheral
edge of the heating device 22 and the second seal ring 52, and the second seal ring
52 seals a gap between the second thermal insulation member 62 and the casing 21.
[0074] As illustrated in Figs. 1, 2, 6, 10, and 14-16, in some embodiments of the present
disclosure, the pump heater 200 can further include a wiring terminal 7, and the wiring
terminal 7 is electrically coupled with the heating device 22 and exposed out of the
casing 21 to supply power to the heating device 22. Further, as illustrated in Figs.
1-3, 5, 6, 10, and 14-16, the heating device 22 can be provided with a terminal box
8, and the wiring terminal 7 is disposed in the terminal box 8 to protect the wiring
terminal 7, so as to improve electrical safety.
[0075] In some embodiments illustrated in Figs. 1-6, 10, 14, 15, 17 and 18, the casing 21
can be constituted by the casing body 211 and the inlet pipe 13 together, the heating
device 22 is disposed below the casing body 211, the inlet pipe 13 is disposed on
the casing body 211, and the inlet 130 is defined in the inlet pipe 13. Thus, the
fluid flows to the lower space 202 of the heating device 22 under the guidance of
the inlet pipe 13, with confronting little hydraulic resistance.
[0076] The pump heater 200 according to a first optional embodiment of the present disclosure
will be described in detail with reference to Figs. 14-16, and it could be understood
that the following description is only explanatory and is not constructed to limit
the present disclosure.
[0077] As illustrated in Figs. 14-16, the pump heater 200 according to the embodiment of
the present disclosure includes the casing 21, the heating device 22 and the wiring
terminal 7.
[0078] Specifically, the casing 21 includes the casing body 211 and the inlet pipe 13. The
heating device 22 is mounted to a lower surface of the casing body 211 and is provided
with the terminal box 8. The terminal box 8 is exposed out of the casing body 211,
and the wiring terminal 7 is mounted in the terminal box 8 and electrically connected
with the heating device 22. The inlet pipe 13 is integrally formed on the casing body
211 and has the inlet 130, and the inlet 130 communicates the upper space 201 of the
casing body 211 with the lower space 202 of the heating device 22. The heating device
22 is a ring-shaped heating plate having a central through hole and applied with a
thick-film resistor on its outer surface, the position of the central through hole
corresponding corresponds to the position of the inlet 130 in the vertical direction.
[0079] The first thermal insulation member 61 extending along the circumferential direction
of the inner peripheral edge is welded to the inner peripheral edge of the heating
device 22, and the second thermal insulation member 62 extending along the circumferential
direction of the outer peripheral edge is welded to the outer peripheral edge of the
heating device 22. A section of the first thermal insulation member 61 in a vertical
plane is substantially L-shaped, and the first thermal insulation member 61 is sealed
from the casing body 211 by means of the first seal ring 51. A section of the second
thermal insulation member 62 in the vertical plane is substantially Z-shaped, and
the second thermal insulation member 62 is sealed from the casing body 211 by means
of the second seal ring 52.
[0080] For the pump heater 200 according to the embodiment of the present disclosure, by
mounting the heating device 22 below the casing body 211 and making the heating device
22 avoid the inlet 130, and coating the outer surface of the heating device 22 with
the thick-film resistor, not only the space utilization rate and the heating efficiency
of the pump heater 200 are enhanced, but also the pumping efficiency can be ensured.
[0081] The pump heater 200 according to a second optional embodiment of the present disclosure
will be described in detail with reference to Figs. 17 and 18, and it could be understood
that the following description is only explanatory and is not constructed to limit
the present disclosure.
[0082] As illustrated in Figs. 17 and 18, the pump heater 200 according to the embodiment
of the present disclosure includes the casing 21 and the heating device 22.
[0083] Specifically, the casing 21 includes the casing body 211 and the inlet pipe 13. The
heating device 22 is mounted to the lower surface of the casing body 211. The inlet
pipe 13 is integrally formed on the casing body 211 and has the inlet 130, the inlet
130 communicates the upper space 201 of the casing body 211 with the lower space 202
of the heating device 22, and the lower end of the inlet pipe 13 extends into the
lower space 202. The heating device 22 is an annular heating plate having a central
through hole and coated with a thick-film resistor on its outer surface, the position
of the central through hole corresponds to the position of the inlet 130 in the vertical
direction. The inner peripheral edge of the heating device 22 is sealed from the casing
body 211 and from the inlet pipe 13 by means of the first seal ring 51, while the
outer peripheral edge of the heating device 22 is sealed from the casing body 211
by means of the second seal ring 52.
[0084] The centrifugal pump 100 according to a specific embodiment of the present disclosure
will be described in detail with reference to Figs. 1-9, and the centrifugal pump
100 is suitable for various applications, such as fluid transportation, cooling systems
and domestic appliances, and has advantages of the compact structure, small volume,
high heating efficiency and good pumping performance. It could be understood that
the following description is only explanatory and is not constructed to limit the
present disclosure.
[0085] As illustrated in Figs. 1-9, the centrifugal pump 100 according to the embodiment
of the present disclosure includes the housing body 14, the pump heater 200, the flow
guide member 3 and the impeller 4.
[0086] Specifically, the pump heater 200 includes the casing 21, the heating device 22 and
the wiring terminal 7. The casing 21 includes the casing body 211 and the inlet pipe
13. The heating device 22 is mounted to the lower surface of the casing body 211 and
is provided with the terminal box 8. The terminal box 8 is exposed out of the casing
body 211, and the wiring terminal 7 is mounted in the terminal box 8 and electrically
connected with the heating device 22. The inlet pipe 13 is mounted on the casing body
211 and has the inlet 130. The inlet 130 communicates the upper space 201 of the casing
body 211 with the lower space 202 of the heating device 22. The heating device 22
is an annular heating plate having a central through hole and coated with a thick-film
resistor on its outer surface, the position of the central through hole corresponds
to the position of the inlet 130 in the vertical direction.
[0087] The housing body 14, the casing body 211 and the inlet pipe 13 constitute the pump
housing 1 of the centrifugal pump 100. The heating chamber 11 and the pump chamber
12 are defined in the housing body 14, the heating chamber 11 is located above the
pump chamber 12, the heating chamber 11 and the pump chamber 12 are communicated at
the central axis of the housing body 14, and the heating chamber 11 and the pump chamber
12 are located below the heating device 22. The heating chamber 11 is in communication
with the inlet 130, the lower end of the inlet pipe 13 extends into the heating chamber
11, the outer peripheral wall of the housing body 14 defines the outlet 140 in communication
with the pump chamber 12, and the central axis of the outlet 140 is tangent to the
outer peripheral wall of the housing body 14.
[0088] As illustrated in Fig. 4, the heating device 22 is pressed to the upper end of the
housing body 14 by the casing body 211, and the lower surface of the heating device
22 is formed as the top wall of the heating chamber 11. The first seal ring 51 is
used for sealing the inner peripheral edge of the heating device 22 from an outer
peripheral surface of the inlet pipe 13 by means of the first seal ring 51, while
the second seal ring 52 is used to for sealing the outer peripheral edge of the heating
device 22 from the housing body 14 and sealing the housing body 14 from the casing
body 211. The flow guide member 3 is disposed within the heating chamber 11 and located
below the heating device 22, and the flow guide member 3 includes the separating plate
31, a plurality of spiral vanes 32 and a plurality of reverse spiral vanes 33. As
illustrated in Figs. 4 and 8, the separating plate 31 is recessed downwards and inwards
along the radial direction, the outer peripheral edge of the separating plate 31 is
located above the center of the separating plate 31, a plurality of positioning holes
310 are provided and spaced along the circumferential direction of the separating
plate 31, a conical guide flow block 311 is provided at the center of the upper surface
of the separating plate 31, and the vertex of the flow guide block 311 is rounded
off.
[0089] As illustrated in Figs. 4 and 7, the plurality of spiral vanes 32 are provided on
the upper side of the separating plate 31 and integrally formed with the separating
plate 31. The spiral vanes 32 are shifted clockwise outwards from inside to outside
along the radial direction of the separating plate 31 and defines the spreading channel
in the upper side of the separating plate 31. The inner ends of the spiral vanes 32
are provided with the engaging notches 320, and the lower end of the inlet pipe 13
is fitted in the engaging notches 320 of the plurality of spiral vanes 32. Thus, the
inlet pipe 13 is fitted with the flow guide member 3.
[0090] As illustrated in Figs. 1 and 4, the plurality of reverse spiral vanes 33 are provided
to the lower side of the separating plate 31 and integrally formed with the housing
body 14. The reverse spiral vanes 33 are shifted counterclockwise from inside to outside
along the radial direction of the separating plate 31 and define the converging channel
in the lower side of the separating plate 31. Only one of two adjacent reverse spiral
vanes 33 is provided with the positioning column 331, and a plurality of positioning
columns 331 are fitted in a plurality of positioning holes 310 correspondingly. Thus,
the separating plate 31 is supported on the plurality of reverse spiral vanes 33,
and hence the flow guide member 3 is mounted on the housing body 14.
[0091] As illustrated in Fig. 4, the impeller 4 is disposed within the pump chamber 12,
the fluid converging in the pump chamber 12 flows to the outlet 140 under the guidance
of the impeller 4, and the housing body 14 surrounding the impeller 4 has a spiral
shape. The central axis of the inlet 130, the central axis of the housing body 14,
the central axis of the central through hole of the heating device 22, the central
axis of the flow guide member 3, and the central axis of the impeller 4 coincide with
each other.
[0092] A heating and pumping process of the centrifugal pump 100 according to embodiments
of the present disclosure will be described with reference to the drawings.
[0093] The fluid flows along the spreading channel after entering the heating chamber 11
via the inlet 130, and at this time, the flow of the fluid spreads from inside to
outside along the radial direction of the heating device 22. Afterwards, the fluid
spread by the spreading channel flows into the converging channel, and at this time,
the flow of the fluid converges from outside to inside along the radial direction
of the heating device 22. In such a way, resistance due to curves to the fluid flow
and the resulting fluid loss due to curves are reduced; and since the fluid spreads
outwards along the radial direction of the heating device 22, the fluid can flow through
the lower surface of the heating device 22 and get full contact with the heating device
22, enlarging a heated area of the fluid, and finally, the heated fluid converges
into the pump chamber 12 and then flows to the outlet 140 under the guidance of the
impeller 4.
[0094] Since the centrifugal pump 100 according to embodiments of the present disclosure
employs the above pump heater 200, the centrifugal pump 100 has the compact structure,
small volume and improved space utilization rate. Meanwhile, the heating device 22
is provided in a manner of avoiding the inlet 130, so the hydraulic resistance to
the fluid will not be increased, and the pump housing 1 surrounding the impeller 4
is designed in the spiral shape, thereby enhancing the pumping performance of the
centrifugal pump 100. Additionally, the flow guide member 3 is employed, not only
the fluid loss due to curves is reduced, but also the fluid can flow through the lower
surface of the heating device 22 and contact with the heating device 22 sufficiently,
such that the outer diameter of the heating device 22 can match the outer diameter
of the pump housing 1 to improve the heating efficiency for the fluid and reduce the
axial size of the centrifugal pump 100.
[0095] The centrifugal pump 100 according to another embodiment of the present disclosure
will be described with reference to Figs. 2-6 and Figs. 10-13, and it could be understood
that the following description is only explanatory and is not constructed to limit
the present disclosure.
[0096] As illustrated in Figs. 2-6 and Figs. 10-13, the centrifugal pump 100 according the
embodiment of the present disclosure includes the housing body 14, the pump heater
200, the flow guide member 3 and the impeller 4.
[0097] Specifically, the pump heater 200 includes the casing 21, the heating device 22 and
the wiring terminal 7. The casing 21 includes the casing body 211 and the inlet pipe
13. The heating device 22 is mounted to the lower surface of the casing body 211 and
is provided with the terminal box 8. The terminal box 8 is exposed out of the casing
body 211, and the wiring terminal 7 is mounted in the terminal box 8 and electrically
coupled with the heating device 22. The inlet pipe 13 is mounted on the casing body
211 and has the inlet 130. The inlet 130 communicates the upper space 201 of the casing
body 211 with the lower space 202 of the heating device 22. The heating device 22
is an annular heating plate having a central through hole and coated with a thick-film
resistor on its outer surface, the position of the central through hole corresponds
to the position of the inlet 130 in the vertical direction.
[0098] The housing body 14, the casing body 211 and the inlet pipe 13 constitute the pump
housing 1 of the centrifugal pump 100. The heating chamber 11 and the pump chamber
12 are defined in the housing body 14, the heating chamber 11 is located above the
pump chamber 12, the heating chamber 11 and the pump chamber 12 are communicated at
the central axis of the housing body 14, and the heating chamber 11 and the pump chamber
12 are located below the heating device 22. The heating chamber 11 is in communication
with the inlet 130, the lower end of the inlet pipe 13 extends into the heating chamber
11, the outer peripheral wall of the housing body 14 defines the outlet 140 in communication
with the pump chamber 12, and the central axis of the outlet 140 is tangent to the
outer peripheral wall of the housing body 14.
[0099] As illustrated in Fig. 4, the heating device 22 is pressed to the upper end of the
housing body 14 by the casing body 211, and the lower surface of the heating device
22 is formed as the top wall of the heating chamber 11. The first seal ring 51 is
used for sealing the inner peripheral edge of the heating device 22 from an outer
peripheral face of the inlet pipe 13, while the second seal ring 52 is used for sealing
the outer peripheral edge of the heating device 22 from the housing body 14 and sealing
the housing body 14 from the casing body 211. The flow guide member 3 is integrally
formed and disposed within the heating chamber 11, and is located below the heating
device 22. The flow guide member 3 includes the separating plate 31, a plurality of
spiral vanes 32 and a plurality of reverse spiral vanes 33. As illustrated in Figs.
4 and 12, the separating plate 31 is recessed downwards and inwards along the radial
direction, the outer peripheral edge of the separating plate 31 is located above the
center of the separating plate 31, a plurality of positioning holes 310 are provided
and spaced along the circumferential direction of the separating plate 31, a conical
guide flow block 311 is provided at the center of the upper surface of the separating
plate 31, and the vertex of the flow guide block 311 is rounded off.
[0100] As illustrated in Figs. 4 and 11, the plurality of spiral vanes 32 are disposed at
the upper side of the separating plate 31. The spiral vanes 32 are shifted clockwise
outwards along the radial direction of the separating plate 31 and define the spreading
channel in the upper side of the separating plate 31. The lower end of the inlet pipe
13 is fitted in the engaging notches 320 of the plurality of spiral vanes 32. Thus,
the inlet pipe 13 is fitted with the flow guide member 3.
[0101] As illustrated in Figs. 10 and 12, the plurality of reverse spiral vanes 33 are disposed
at the lower side of the separating plate 31. The reverse spiral vanes 33 are shifted
counterclockwise outwards along the radial direction of the separating plate 31 and
define the converging channel in the lower side of the separating plate 31. The plurality
of reverse spiral vanes 33 are supported on the housing body 14. Thus, the flow guide
member 3 is supported on the housing body 14.
[0102] As illustrated in Figs. 4-6, the impeller 4 is disposed within the pump chamber 12,
the fluid converging in the pump chamber 12 flows to the outlet 140 under the guidance
of the impeller 4, and the housing body 14 surrounding the impeller 4 has a spiral
shape. The central axis of the inlet 130, the central axis of the housing body 14,
the central axis of the central through hole of the heating device 22, the central
axis of the flow guide member 3, and the central axis of the impeller 4 coincide with
each other.
[0103] Since the centrifugal pump 100 according to embodiments of the present disclosure
employs the above pump heater 200, the centrifugal pump 100 has the compact structure,
small volume and improved space utilization rate. Meanwhile, the heating device 22
is provided in a manner of avoiding the inlet 130, so the hydraulic resistance to
the fluid will not be increased, and the pump housing 1 surrounding the impeller 4
is designed in the spiral shape, thereby enhancing the pumping performance of the
centrifugal pump 100. Additionally, with the spreading channel defined by the plurality
of spiral vanes 32 and the converging channel defined by the plurality of reverse
spiral vanes 33, the fluid flows along a relatively large turning radius, reducing
the fluid loss, and the separating plate 31 is recessed downwards and inwards along
the radial direction, improving the heating efficiency of the fluid.
[0104] In the specification, it is to be understood that terms such as "central," "upper,"
"lower," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise,"
"axial," "radial" and "circumferential" should be construed to refer to the orientation
as then described or as shown in the drawings under discussion. These relative terms
are for convenience of description of the present disclosure and do not indicate or
imply that the device or element referred to must have a particular orientation or
must be constructed or operated in a particular orientation. Thus, these terms cannot
be constructed to limit the present disclosure. In the description of the present
invention, the term "a plurality of' means two or more than two, unless specified
otherwise.
[0105] In the present invention, unless specified or limited otherwise, the terms "mounted,"
"connected," "coupled" and the like are used broadly, and may be, for example, fixed
connections, detachable connections, or integral connections; may also be mechanical
or electrical connections; may also be direct connections or indirect connections
via intervening structures; may also be inner communications of two elements, which
can be understood by those skilled in the art according to specific situations.
[0106] Reference throughout this specification to "a further embodiment," "some embodiments,"
"a specific embodiment," or "an optional embodiment," means that a particular feature,
structure, material, or characteristic described in connection with the embodiment
or example is included in at least one embodiment or example of the present disclosure.
Thus, the appearances of the phrases in various places throughout this specification
are not necessarily referring to the same embodiment or example of the present disclosure.
Furthermore, the particular features, structures, materials, or characteristics may
be combined in any suitable manner in one or more embodiments or examples.
[0107] Although embodiments of the present disclosure have been shown and illustrated, it
shall be understood by those skilled in the art that various changes, modifications,
alternatives and variants without departing from the principle of the present disclosure
are acceptable. The scope of the present disclosure is defined by the claims or the
like.
1. A centrifugal pump, comprising:
a pump housing, internally defining a heating chamber and a pump chamber in communication
with the heating chamber, and provided with an inlet in communication with the heating
chamber and an outlet in communication with the pump chamber;
a heating device, provided on the pump housing;
a flow guide member, provided in the heating chamber and defining a spreading channel
and a converging channel in the heating chamber, the spreading channel being configured
to guide fluid entering through the inlet to spread outwards along a radial direction
of the heating device, and the converging channel being configured to guide the spread
fluid to converge inwards along the radial direction of the heating device to the
pump chamber;
an impeller, provided in the pump chamber and configured to guide the fluid converged
in the pump chamber to the outlet.
2. The centrifugal pump according to claim 1, wherein the spreading channel guides the
fluid entering through the inlet to spread spirally outwards along the radial direction
of the heating device, and the converging channel guides the spread fluid to converge
spirally inwards along the radial direction of the heating device to the pump chamber.
3. The centrifugal pump according to claim 1, wherein the flow guide member comprises:
a separating plate;
a plurality of spiral vanes provided at a side of the separating plate facing the
heating device, and defining the spreading channel at the side of the separating plate
facing the heating device; and
a plurality of reverse spiral vanes provided at another side of the separating plate
facing the pump chamber, and defining the converging channel at the another side of
the separating plate facing the pump chamber.
4. The centrifugal pump according to claim 3, wherein one kind of the spiral vanes and
the reverse spiral vanes is shifted clockwise from inside to outside along a radial
direction of the separating plate, while the other one thereof is shifted counterclockwise
from inside to outside along the radial direction of the separating plate.
5. The centrifugal pump according to claim 3, wherein the plurality of reverse spiral
vanes are connected to a bottom wall of the heating chamber, the plurality of spiral
vanes are connected to the separating plate, and the separating plate is supported
on the plurality of reverse spiral vanes.
6. The centrifugal pump according to claim 5, wherein the plurality of reverse spiral
vanes are integrally formed on the pump housing, and the plurality of spiral vanes
are integrally formed on the separating plate.
7. The centrifugal pump according to claim 5, wherein the separating plate is provided
with a positioning hole, the reverse spiral vane is provided with a positioning column,
and the positioning column is fitted in the positioning hole.
8. The centrifugal pump according to claim 7, wherein a plurality of positioning columns
are provided and disposed to inner ends of corresponding reverse spiral vanes, a plurality
of positioning holes are provided and spaced along a circumferential direction of
the separating plate, and the plurality of positioning columns are fitted in the plurality
of positioning holes respectively.
9. The centrifugal pump according to claim 3, wherein the plurality of reverse spiral
vanes and the plurality of spiral vanes are connected to the separating plate, and
the plurality of reverse spiral vanes are supported on a bottom wall of the heating
chamber.
10. The centrifugal pump according to claim 9, wherein the plurality of reverse spiral
vanes, the plurality of spiral vanes and the separating plate are integrally formed.
11. The centrifugal pump according to claim 3, wherein the pump housing has an inlet pipe
extending into the heating chamber, the inlet is provided in the inlet pipe, inner
ends of the spiral vanes are provided with engaging notches, and an end of the inlet
pipe that extends into the heating chamber is fitted in the engaging notches of the
plurality of spiral vanes.
12. The centrifugal pump according to claim 3, wherein a side surface of the separating
plate facing the heating device is provided with a flow guide block in a center of
the side surface, and the flow guide block is configured to guide the fluid entering
through the inlet to the plurality of spiral vanes.
13. The centrifugal pump according to claim 12, wherein the flow guide block is conical,
and a vertex of the flow guide block is rounded off.
14. The centrifugal pump according to claim 3, wherein an outer peripheral edge of the
separating plate is more adjacent to the heating device compared with that the outer
peripheral edge of the separating plate is adjacent to the pump chamber, and a center
of the separating plate is more adjacent to the pump chamber compared with that the
center of the separating plate is adjacent to the heating device.
15. The centrifugal pump according to any one of claims 1 to 14, wherein a central axis
of the inlet, a central axis of the pump housing, a central axis of the heating device,
a central axis of the flow guide member, and a central axis of the impeller coincide
with each other; the heating chamber and the pump chamber are communicated at the
central axis of the pump housing; the outlet is provided in an outer peripheral wall
of the pump housing, and a central axis of the outlet is tangent to the outer peripheral
wall of the pump housing.
16. The centrifugal pump according to claim 1, wherein the pump housing comprises:
a housing body, the heating chamber and the pump chamber being defined in the housing
body, and the outlet being provided in the housing body;
a casing body, detachably mounted to the housing body and pressing the heating device
to an upper end of the housing body; and
an inlet pipe, the inlet pipe being provided on the casing body, and the inlet being
provided in the inlet pipe.
17. The centrifugal pump according to claim 1, wherein the heating device is configured
as an annular heating plate having a central through hole, and a position of the central
through hole corresponds to a position of the inlet in a vertical direction.
18. The centrifugal pump according to claim 17, wherein at least one of an upper surface
and an outer peripheral surface of the heating device is provided with a resistance
coating.
19. The centrifugal pump according to claim 17, wherein a seal ring is provided between
an inner peripheral edge of the heating device and the pump housing for sealing, and
another seal ring is provided between an outer peripheral edge of the heating device
and the pump housing for sealing, and a thermal insulation member is provided between
the inner peripheral edge and/or the outer peripheral edge of the heating device and
the corresponding seal ring.
20. The centrifugal pump according to claim 1, further comprising:
a terminal box, provided on the heating device; and
a wiring terminal, provided in the terminal box, electrically coupled with the heating
device, and exposed out of the pump housing.