[0001] The present invention relates to a cleaning device for a refrigerated display counter.
The aforesaid cleaning device is conveniently used for cleaning components of the
refrigerant circuit for cooling said refrigerated display counter. Particularly, although
not exclusively, the aforesaid cleaning device can be conveniently employed for cleaning
a condenser of the refrigerant circuit.
[0002] Refrigerated counters are known for the display of food products.
[0003] Generally, these counters comprise a display structure formed by a base for containing
food products and, possibly, by a plurality of shelves on which to position the food
products. A refrigerant circuit for cooling the refrigerated display counter is suitably
positioned below the display structure. In particular, the refrigerant circuit comprises
a laminating member, an evaporator, a compressor and a condenser. Generally, the evaporator
is positioned immediately below the base, within a bottom portion of the display structure,
while the condenser and the compressor are housed within a special containment structure,
placed below the bottom portion. The containment structure is substantially box-shaped
with side walls which have protection grilles with holes for the passage of air. In
particular, the grilles allow the entry of an air flow from the external environment
towards the inside of the box-like structure and the exit of the air flow from the
latter towards the external environment. The condenser can be positioned within the
box-like structure in a position adjacent to a first protection grille, generally
the protection grille of a front side wall, which allows the entry of the air flow
from the external environment, so that such an air flow is directed on the condenser
itself. Suitably, the air is sucked inside the box-like structure by means of a fan
placed immediately behind the condenser.
[0004] Always inside the box-like structure, in a position further back with respect to
the condenser, the compressor of the refrigerant circuit and a condensate collection
tray are provided. Further grilles are provided on the other walls of the box-like
structure for the exit of the air towards the external environment which, inside said
box-like structure, is heated by absorbing the heat released by the condenser and
generated by the operation of the compressor.
[0005] However, the traditional refrigerated counters described above have some drawbacks.
[0006] In particular, being near the floor, dirt or dust accumulates extremely easily and
quickly on the condenser which, undesirably, reduces the ability of the condenser
itself to dissipate heat. More in detail, this reduces the effectiveness of the refrigerant
circuit and further causes an overload of the compressor, an overload which undesirably
causes an increase in the electrical consumption required for the operation of the
compressor itself and/or its breakage.
[0007] To avoid this inconvenience, therefore, frequent cleaning and maintenance operations
are necessary, which are particularly laborious, delicate and long, as well as expensive
since they require the use of dedicated staff.
[0008] The object of the innovation is to propose a refrigerated display counter which overcomes
the aforesaid drawbacks present in the traditional solutions.
[0009] Another object of the innovation is to propose a refrigerated display counter which
requires less cleaning and maintenance interventions of the components of the refrigerant
circuit, and in particular of the condenser.
[0010] Another object of the innovation is to propose a refrigerated display counter in
which the cleaning and maintenance interventions of the components of the refrigerant
circuit, and in particular of the condenser, are simpler and faster to perform.
[0011] Another object of the innovation is to propose a refrigerated display counter in
which the cleaning and maintenance interventions of the components of the refrigerant
circuit, and in particular of the condenser, can be carried out by any unspecialised
operator.
[0012] Another object of the innovation is to propose a refrigerated display counter which
allows to reduce the risk of overheating or breakage of the components of the refrigerant
circuit, and in particular of the compressor.
[0013] Another object of the innovation is to propose a refrigerated display counter which
allows to reduce the risk of obstruction, even partial and temporary, of the air flow
entering the containment structure of the refrigerant circuit.
[0014] Another object of the innovation is to propose a refrigerated display counter which
is highly efficient from the point of view of energy consumption.
[0015] All these objects, whether considered alone or in any combination thereof, and others
which will result from the following description are achieved, according to the innovation,
with the refrigerated display counter having the features indicated in claim 1.
[0016] The present innovation is hereinafter further clarified in a preferred embodiment
thereof, reported for purely exemplary and non-limiting purposes with reference to
the attached drawing tables, in which:
figure 1 shows a perspective view of a refrigerated display counter;
figure 2 shows an enlarged detail of the counter of fig. 1,
figure 3 shows the detail of fig. 1 with a side wall removed
figure 4 shows an exploded front view of the counter of fig. 1,
figure 5 shows an exploded partial view of the counter of fig. 1,
figure 6 shows a rear exploded view of the counter of fig. 1.
Suitably, hereinafter, the term "refrigerated counter" refers to average-temperature
counters, i.e., counters adapted to ensure conservation temperatures of products close
to zero. In particular, with reference to standard UNI EN 23953, the counters to which
the present innovation refer belong to climate class M0 with temperatures comprised
between - 1°C and +4°C, to class M1 with temperatures between -1°C and +5°C, or to
class M2 with temperatures between -1°C and 7°C.
[0017] In particular, the refrigerated display counter 1 according to the present innovation
is of the type provided for the display of food products, and can be used for assisted
or free sales.
[0018] In particular, the refrigerated display counter 1 according to the present innovation
is of the autonomous type (also called "plug-in"), as all the components of the refrigerant
circuit are entirely housed therein and, therefore, exclusively requires the power
supply connection to the electrical grid.
[0019] As depicted in figure 1, the refrigerated display counter 1 comprises a display structure
2 for containing food products to be displayed and refrigerated. Preferably, the display
structure 2 has a tub shape inside which a compartment is defined for positioning
and containing the food products to be displayed and refrigerated.
[0020] Suitably, the refrigerated display counter 1 according to the present invention comprises
a traditional compression refrigerant circuit 6 of a refrigerant fluid. Suitably,
the refrigerant circuit 6 for cooling the display structure 2 is positioned below
the latter. In particular, the evaporator (not depicted) of the refrigerant circuit
6 is positioned immediately below the display structure 2 and inside the bottom portion
3 of the display structure 2. The refrigerant circuit 6 comprises a condenser 11 and
a compressor 12 housed inside a containment structure 5.
[0021] Suitably, the counter 1 comprises a command and control unit (e.g., a processor)
connected to the components of the refrigerant circuit for its management and control.
[0022] Suitably, the containment structure 5 is substantially box-shaped and delimits an
inner chamber 17 in which the condenser 11, the compressor 12 and, preferably, a condensate
collection tank (not depicted) are housed.
[0023] In particular, the containment structure 5 is defined by several (preferably four)
side walls 21, 22, 23, 24 arranged vertically. Suitably, the containment structure
5 is configured so that its side walls 21, 22, 23, 24 are associated with each other
by removable mechanical fixing means, so as to allow easy and quick access to the
inner chamber 17 of the containment structure 5. The side walls 21, 22, 23, 24 comprise
a first side wall 21 and a second side wall 22 opposite the first side wall 21. The
condenser 11 is housed within the containment structure 5 at or near the first side
wall 21. The compressor 12 is housed within the containment structure 5 at or near
the second side wall 22. Advantageously, the first side wall 21 and the second side
wall 22 comprise respective perforated grilles 36, 46. Suitably, an air flow enters
inside the containment structure 5 from the perforated grille 36 of the first side
wall 21 to substantially horizontally cross the inner chamber 17. The air flow exits
the containment structure 5 from the perforated grille 37 of the second side wall
22 and/or from an open bottom of the containment structure 5. Suitably, the condenser
11 is associated with a fan 41 which sucks the entering air flow so that it crosses
the condenser 11 and so that it circulates inside the inner chamber 17 and thus cools
the compressor 12, thereby reducing the risk of its overheating. Preferably, the fan
41 is associated with the condenser 11 at the innermost face of the latter, i.e.,
the face facing the inner chamber 17.
[0024] The condenser 11 comprises a plurality of metal slats defining the main heat exchange
surface and which are arranged substantially vertically so as to be superficially
lapped by the air flow which, crossing the condenser 11, sliding substantially parallel
with respect to said slats. The front edge of the slats closest to the first side
wall 21 defines a surface to be cleaned 16 of the condenser 11.
[0025] According to the present innovation, to clean the surface to be cleaned 16, the refrigerated
display counter 1 comprises a cleaning device 10.
[0026] The cleaning device 10 comprises a cleaning element 31 movable along the surface
to be cleaned 16, a handle 32 graspable by an operator for moving the cleaning element
31 and a connecting support 33 for connecting the cleaning element 31 and the handle
32 together. The cleaning element 31 is shaped like a brush or similar device adapted
to clean a surface. The connecting support 33 is through a hole 35 provided in the
first side wall 21, which is interposed between the cleaning element 31 and the handle
32. The hole 35 as shown in the appended drawings is shaped like an elongated slot
according to a sliding direction of said cleaning device 10. The slotted hole 35 is
straight and vertically oriented. According to the present innovation, an operator
can use the cleaning device 10 by grasping the handle 32 and sliding the cleaning
device 10 along the slotted hole 35 without the need to remove the first side wall
21. By operating the handle 32, the operator slides the cleaning element 31 along
the surface to be cleaned 16, thereby promoting the removal of dust and/or other dirt
from the surface to be cleaned 16. According to other embodiments (not depicted),
the hole 35 could be shaped differently from a straight slot. For example, the hole
35 could be curved or circular to allow a rotation or rototranslation of the cleaning
element 31 on the surface to be cleaned 16.
[0027] The cleaning device 10 further comprises a sliding guide 37 for guiding the connecting
support 33 and the cleaning element 31 therewith, along the surface to be cleaned
16. The sliding guide 37 is fixed to a frame 42 provided in the containment structure
5 so as to also be covered by the first side wall 21. The sliding guide 37 is fixed
to one or more supports 39 provided in the frame 42, for example by means of screws
or other similar connection. The frame 42 is shaped like a quadrangular frame with
a central hole to allow air to pass towards the condenser 11. The cleaning device
10 further comprises at least one sliding bearing 38 (two sliding bearings 38 in the
embodiment of the appended drawings) sliding along the sliding guide 37. The sliding
bearings 38 are fixed to the connecting support 33, so as to allow the integral sliding
of the connecting support 33 and the sliding bearings 38 along the sliding guide 37.
[0028] According to other embodiments (not shown) of the present invention, the refrigerated
display counter 1 could also comprise at least a second cleaning device 10 associated
with one or more of the other side walls 22, 23, 23 of the containment structure 5.
For example, a second cleaning device 10 could be associated with the second side
wall 22 for cleaning a surface to be cleaned placed on the compressor 12.
[0029] It is clear from the above that the refrigerated display counter according to the
innovation is particularly advantageous, as the cleaning device of the present innovation
can be operated externally by an operator without removing any structure of the refrigerated
display counter. This allows to prevent malfunctions due to the accumulation of dirt
without the intervention of specialised staff. Intervening manually on a handle accessible
from the outside,even the unspecialised operator can clean the condenser easily and
safely, without using tools and without removing the cover panel which also has the
function of protecting from direct access to live parts or sharp parts such as the
fins of the exchanger.
[0030] Furthermore, the system is inexpensive enough to be
applied to any refrigerated display counter, even already existing.
[0031] The present invention has been illustrated and described in a preferred embodiment
thereof, but it is understood that executive variants can be made thereto in practice,
without however departing from the scope of protection of the present invention.
1. Refrigerated display counter (1) comprising:
- a display structure (2) for positioning and containing products to be displayed
and refrigerated,
- a containment structure (5) positioned below with respect to said display structure
(2), said containment structure (5) comprising at least a first side wall (21),
- a steam compression refrigerant circuit (6), wherein a condenser (11) of said refrigerant
circuit (6) is housed inside said containment structure (5),
- a cleaning device (10) comprising a cleaning element (31) movable along a surface
to be cleaned (16) of said refrigerant circuit (6), a handle (32) graspable by an
operator for moving said cleaning element (31) and a connecting support (33) for connecting
said cleaning element (31) and said handle (32),
wherein said first side wall (21) is interposed between said cleaning element (31)
and said handle (32) and said first side wall (21) is provided with a hole (35), said
connecting support (33) being through said hole (35).
2. Refrigerated display counter (1) according to claim 1, wherein
said hole (35) is slot-shaped, said slot being elongated according to a sliding direction
of said cleaning device (10).
3. Refrigerated display counter (1) according to claim 3, wherein
said slotted hole (35) is vertically oriented.
4. Refrigerated display counter (1) according to one of the preceding claims,
wherein said condenser (11) comprises said surface to be cleaned (16).
5. Refrigerated display counter (1) according to one of the preceding claims,
wherein said cleaning element (31) is brush-shaped.
6. Refrigerated display counter (1) according to one of the preceding claims,
wherein said first side wall (21) comprises a perforated grille (36) for the entry
of a cooling air flow in said containment structure (5).
7. Refrigerated display counter (1) according to one of the preceding claims,
wherein said cleaning device (10) comprises a sliding guide (37) to guide for said
connecting support (33).
8. Refrigerated display counter (1) according to one of the preceding claims,
wherein said cleaning device (10) comprises at least one sliding bearing (38) slidable
along said sliding guide (37), said sliding bearing (38) being fixed to said connecting
support (33).
9. Refrigerated display counter (1) according to claim 7 or 8, wherein
said containment structure (5) comprises a frame (42), said sliding guide (37) being
fixed to said frame (42).
10. Refrigerated display counter (1) according to one of the preceding claims, wherein
said refrigerated display counter (1) comprises at least a second cleaning device
(10) associated with a second side wall (22) of said containment structure (5).