TECHNICAL FIELD
[0001] The present disclosure relates to a high-frequency heating device such as a microwave
oven.
BACKGROUND ART
[0002] Conventionally, high-frequency heating devices which heat heating subjects such as
food products by supplying microwaves to surface wave transmission lines have been
developed.
[0003] For example, Patent Literature (PTL 1) discloses a high-frequency heating device
which thaws a frozen sushi placed in a surface wave transmission line by directly
supplying microwaves to the surface wave transmission line.
[0004] Document
EP2741574 discloses a High-frequency heating device of the prior art.
Citation List
Patent Literature
[0005] PTL 1: Unexamined Japanese Patent Publication No.
H08-166133
SUMMARY OF THE INVENTION
[0006] In the field of high-frequency heating devices, efficiently heating a heating subject
has been a long-standing goal. An objective of the present disclosure is to provide
a high-frequency heating device which contributes to achieving the aforementioned
goal.
[0007] A high-frequency heating device according to one aspect of the present disclosure
includes a generation unit, a surface wave exciter, a first connecting unit, and a
reuse unit.
[0008] The generation unit generates microwaves. The surface wave exciter includes a periodic
structure and heats a heating subject by propagating the microwaves in a surface wave
mode. The first connecting unit is disposed at one end portion of the surface wave
exciter. The microwaves generated by the generation unit are supplied to the surface
wave exciter through the first connecting unit.
[0009] The reuse unit reuses, for heating the heating subject, the microwaves in the surface
wave mode that have reached another end portion of the surface wave exciter located
in a propagation direction of the microwaves from one end portion of the surface wave
exciter.
[0010] According to the present embodiment, microwaves that have not been absorbed by the
heating subject can be reused for heating a heating subject. As a result, the utilization
efficiency of microwave energy can be improved.
BRIEF DESCRIPTION OF THE DRAWINGS
[0011]
FIG. 1 is a vertical cross-sectional view schematically illustrating a configuration
of a high-frequency heating device according to Embodiment 1.
FIG. 2 is a horizontal cross-sectional view schematically illustrating a configuration
of a high-frequency heating device according to Embodiment 1.
FIG. 3 is a horizontal cross-sectional view schematically illustrating a configuration
of a high-frequency heating device according to Embodiment 2.
FIG. 4 is a horizontal cross-sectional view schematically illustrating a configuration
of a high-frequency heating device according to Embodiment 3.
FIG. 5 is a perspective view illustrating a configuration of a surface wave exciter
according to Embodiment 3.
FIG. 6 is a perspective view illustrating a configuration of a surface wave exciter
according to Embodiment 3.
FIG. 7 is a horizontal cross-sectional view schematically illustrating a configuration
of a high-frequency heating device according to Embodiment 4.
DESCRIPTION OF EMBODIMENTS
[0012] A high-frequency heating device according to the present disclosure includes the
features of claim 1, preferred embodiments are disclosed in the dependent claims.
[0013] The generation unit is configured to generate microwaves. The surface wave exciter
includes a periodic structure and heats a heating subject by propagating the microwaves
in a surface wave mode. The first connecting unit is disposed at one end portion of
the surface wave exciter. The microwaves generated by the generation unit are supplied
to the surface wave exciter through the first connecting unit.
[0014] The reuse unit is configured to reuse, for heating the heating subject, the microwaves
in the surface wave mode that have reached another end portion of the surface wave
exciter located in a propagation direction of the microwaves from one end portion
of the surface wave exciter.
[0015] Hereinafter, preferred embodiments of the high-frequency heating device according
to the present disclosure will be described with reference to the accompanying drawings.
The high-frequency heating device according to the present disclosure is specifically
a microwave oven. However, the high-frequency heating device according to the present
disclosure is not limited to this and includes a heating device which uses dielectric
heating, a garbage disposer, a semiconductor manufacturing device, and the like.
[0016] In the subsequent description, the same reference marks are given to the same or
equivalent structural elements and redundant description thereof will be omitted.
EMBODIMENT 1
<Overall Configuration>
[0017] FIG. 1 and FIG. 2 are a vertical cross-sectional view and a horizontal cross-sectional
view, respectively, which schematically illustrate a configuration of high-frequency
heating device 1a according to Embodiment 1 of the present disclosure.
[0018] As illustrated in FIG. 1 and FIG. 2, high-frequency heating device 1a includes heating
chamber 2, generation unit 8, surface wave exciter 10, connecting unit 12, reflective
unit 14, and control unit 16. High-frequency heating device 1a is configured to heat
heating subject 6 placed on tray 4 by microwaves which propagate on a surface of surface
wave exciter 10 in a surface wave mode.
[0019] Note that FIG. 2 schematically illustrates a situation in which microwaves in the
surface wave mode propagate on surface wave exciter 10 and also schematically illustrates
a placement position of heating subject 6 on tray 4 (not illustrated in FIG. 2).
[0020] The structural elements will be described below.
<Generation Unit>
[0021] Generation unit 8 includes a magnetron and an inverter and is configured to generate
microwaves under control of control unit 16. A solid-state oscillator and a power
amplifier may constitute generation unit 8.
<Surface Wave Exciter>
[0022] Surface wave exciter 10 is disposed below tray 4. Surface wave exciter 10 heats heating
subject 6 placed on tray 4 by propagating the microwaves in the surface wave mode.
[0023] Surface wave exciter 10 is a stub-type surface wave exciter which is a metallic periodic
structure. Surface wave exciter 10 includes a plurality of metal plates 11 arranged
on metal plate 13 at a predetermined interval.
[0024] Surface wave exciter 10 does not need to be the stub-type surface wave exciter and
may be an interdigital surface wave exciter obtained by stamping a metal plate into
an interdigitated pattern. Surface wave exciter 10 may be formed using a dielectric
plate such as an alumna plate or a Bakelite plate instead of the metallic periodic
structure.
[0025] The excitation frequency of surface wave exciter 10 depends on material, size, etc.
In the case of the stub-type surface wave exciter, the excitation frequency can be
set to a desired value by appropriately selecting the height, interval, etc., of metal
plates 11. Generally, the excitation frequency of surface wave exciter 10 increases
as the height of metal plates 11 is reduced and as the interval between metal plates
11 is reduced.
[0026] Metal plates 11 are arranged parallel to each other. Surface wave exciter 10 propagates
the surface waves perpendicularly to metal plate 11, that is, along the alinement
of metal plates 11. The propagation direction of the microwaves propagating on surface
wave exciter 10 in the surface wave mode matches the alinement direction of metal
plates 11.
<Connecting Unit>
[0027] Connecting unit 12 is disposed on power supply edge 15 which is one end portion of
surface wave exciter 10 (the left end of surface wave exciter 10 in FIG. 1 and FIG.
2). The microwaves generated by generation unit 8 are supplied from power supply edge
15 to surface wave exciter 10 through connecting unit 12. In the present exemplary
embodiment, connecting unit 12 is a rectangular waveguide. Connecting unit 12 corresponds
to the first connecting unit.
<Reflective Unit>
[0028] Reflective unit 14 is disposed so as to cover terminal edge 17. Terminal edge 17
is another end portion of surface wave exciter 10 that is located in propagation direction
D1 from power supply edge 15 (the right end of surface wave exciter 10 in FIG. 1 and
FIG. 2). Reflective unit 14 totally reflects, off terminal edge 17, microwaves in
the surface wave mode that have propagated on the surface of surface wave exciter
10. In the present exemplary embodiment, reflective unit 14 is a rectangular waveguide.
<Effects of Surface Wave Exciter>
[0029] Effects of surface wave exciter 10 will be described with reference to FIG. 2.
[0030] As illustrated in FIG. 2, the microwaves generated by generation unit 8 are supplied
from power supply edge 15 to surface wave exciter 10 through connecting unit 12.
[0031] When the microwaves are supplied, surface waves S1 which propagate on the surface
of surface wave exciter 10 are generated. Surface waves S1 propagate in propagation
direction D1 (in the figure, from the left to the right) and heats heating subject
6 from below.
[0032] Surface waves S2, which are part of surface waves S1, further propagate on the surface
of surface wave exciter 10 in propagation direction D1 without being absorbed by heating
subject 6, and reach terminal edge 17 of surface wave exciter 10. Reflective unit
14 reflects surface waves S2 off terminal edge 17, reversing the propagation direction
of surface waves S2. The propagation direction of surface waves S2 is changed from
propagation direction D1 to propagation direction D2 (in the figure, from the right
to the left).
[0033] Surface waves S2 reflected by reflective unit 14 heat heating subject 6 from below
by propagating on the surface of surface wave exciter 10 from terminal edge 17 toward
power supply edge 15.
[0034] In a conventional high-frequency heating device, microwaves in the surface wave mode
that have not been absorbed by heating subject 6 and have reached the terminal edge
of the surface wave exciter are radiated to space. The microwaves that have been radiated
to space do not contribute to heating of heating subject 6; thus, the utilization
efficiency of microwave energy is reduced.
[0035] In the present exemplary embodiment, heating subject 6 is heated not only with surface
waves S1, but also with surface waves S2 reflected by reflective unit 14. In this
way, high-frequency heating device 1a is capable of reusing, for heating a heating
subject, microwaves that have not been absorbed by the heating subject. As a result,
the utilization efficiency of microwave energy can be improved.
[0036] In other words, in the present exemplary embodiment, reflective unit 14 corresponds
to a reuse unit configured to reuse microwaves that have not been absorbed by heating
subject 6 and have reached the terminal edge of the surface wave exciter.
EMBODIMENT 2
[0037] High-frequency heating device 1b according to Embodiment 2 of the present disclosure
will be described focusing on differences from Embodiment 1. FIG. 3 is a horizontal
cross-sectional view schematically illustrating a configuration of high-frequency
heating device 1b. FIG. 3 schematically illustrates a situation in which microwaves
in the surface wave mode propagate on surface wave exciter 10 and also schematically
illustrates a placement position of heating subject 6 on tray 4 (not illustrated in
FIG. 3).
[0038] In Embodiment 1, surface waves S2 that have reached terminal edge 17 of surface wave
exciter 10 are reflected so that the microwaves are reused. In contrast, in Embodiment
2, microwaves in the surface wave mode are converted into microwaves in another mode
by impedance matching so that the microwaves are reused.
[0039] As illustrated in FIG. 3, high-frequency heating device 1b includes matching unit
22 and conversion unit 24 instead of reflective unit 14. In the present exemplary
embodiment, matching unit 22 and conversion unit 24 correspond to the reuse unit.
High-frequency heating device 1b further includes power storage unit 26.
[0040] Matching unit 22 is connected to terminal edge 17 of surface wave exciter 10. Conversion
unit 24 is connected to matching unit 22 by microwave transmission line 23 and is
connected to power storage unit 26 by direct-current power transmission line 25. Power
storage unit 26 is connected to generation unit 8 and supplies power to generation
unit 8.
[0041] Matching unit 22 is an impedance matching device configured to provide impedance
matching for microwaves. Through the impedance matching, microwaves in the surface
wave mode can be converted into microwaves in a co-axial mode or microwaves in a waveguide
mode. Hereinafter, this will be referred to as mode conversion by impedance matching.
[0042] In the case of converting microwaves in the surface wave mode into microwaves in
the waveguide mode, matching unit 22 may have a stepped stub structure. In the case
of converting microwaves in the surface wave mode into microwaves in the coaxial mode,
matching unit 22 may have a two-step structure which converts microwaves in the surface
wave mode into microwaves in the waveguide mode and then, converts the microwaves
into microwaves in the coaxial mode. Matching unit 22 is not limited to these and
may have various structures.
[0043] Microwave transmission line 23 may be formed of a co-axial line or a waveguide line,
for example. According to the present exemplary embodiment, matching unit 22 converts
microwaves in the surface wave mode into microwaves in the co-axial mode or the waveguide
mode. Therefore, the microwaves can be transmitted to conversion unit 24, which is
another structural element, by microwave transmission line 23.
[0044] Conversion unit 24 is a member which converts microwaves, which are alternating-current
power, into direct-current power. For example, a rectifying antenna (rectenna) may
be used for conversion unit 24.
[0045] In the above-described configuration, heating subject 6 is heated with surface waves
S1 obtained from the microwaves supplied through connecting unit 12. Surface waves
S2 that have propagated on surface wave exciter 10 without being absorbed by heating
subject 6 reach terminal edge 17.
[0046] Matching unit 22 generates microwaves in the co-axial mode or the waveguide mode
by carrying out, by impedance matching, mode conversion of the microwaves (surface
waves S2) in the surface wave mode that have reached terminal edge 17. Matching unit
22 transmits the microwaves resulting from the mode conversion to conversion unit
24 by microwave transmission line 23.
[0047] Conversion unit 24 converts the microwaves into direct-current power and transmits
the direct-current power to power storage unit 26 by direct-current power transmission
line 25. Power storage unit 26 stores the direct-current power as power to be supplied
to generation unit 8.
[0048] As described above, high-frequency heating device 1b converts the microwaves that
have not been absorbed by heating subject 6 into the direct-current power using matching
unit 22 and conversion unit 24. This direct-current power is stored in power storage
unit 26 and, when required, is supplied to generation unit 8.
[0049] In this way, high-frequency heating device 1b is capable of reusing, for heating
a heating subject, microwaves that have not been absorbed by the heating subject.
As a result, the utilization efficiency of microwave energy can be improved.
EMBODIMENT 3
[0050] High-frequency heating device 1c according to Embodiment 3 of the present disclosure
will be described focusing on differences from Embodiment 2. FIG. 4 is a horizontal
cross-sectional view schematically illustrating a configuration of high-frequency
heating device 1c. FIG. 4 schematically illustrates a situation in which microwaves
in the surface wave mode propagate on surface wave exciter 20 and also schematically
illustrates a placement position of heating subject 6 on tray 4 (not illustrated in
FIG. 4).
[0051] As illustrated in FIG. 4, high-frequency heating device 1c does not include conversion
unit 24 or power storage unit 26, but includes connecting unit 32 instead. High-frequency
heating device 1c includes surface wave exciter 20 instead of surface wave exciter
10. Surface wave exciter 20 has a configuration different from the configuration of
surface wave exciter 10 according to Embodiment 2. Connecting unit 32 corresponds
to the second connecting unit.
[0052] High-frequency heating device 1c includes connecting unit 32 in addition to connecting
unit 12. Connecting unit 32 is disposed on power supply edge 33 which is an end portion
of surface wave exciter 20 different from power supply edge 15 and terminal edge 17.
In the present exemplary embodiment, surface wave exciter 20 has the shape of an approximate
square in plan view, and connecting unit 32 is disposed on power supply edge 33 orthogonal
to power supply edge 15. Connecting unit 32 is connected to matching unit 22 by microwave
transmission line 31.
[0053] In the above-described configuration, heating subject 6 is heated with surface waves
S1 obtained from the microwaves supplied through connecting unit 12. Surface waves
S2, which are part of surface waves S1, propagate on the surface of surface wave exciter
10 without being absorbed by heating subject 6, and reach terminal edge 17.
[0054] Matching unit 22 generates microwaves in the co-axial mode or the waveguide mode
by carrying out, by impedance matching, mode conversion of the microwaves (surface
waves S2) in the surface wave mode that have reached terminal edge 17. Matching unit
22 transmits the microwaves resulting from the mode conversion to connecting unit
32 by microwave transmission line 31.
[0055] The microwaves are supplied to surface wave exciter 20 through power supply edge
33 by way of connecting unit 32. With the microwaves, surface waves S3, which propagate
in propagation direction D3 orthogonal to propagation direction D1 of surface waves
S1 and S2, are generated. Heating subject 6 is heated also with surface waves S3.
Thus, in the present exemplary embodiment, matching unit 22 and connecting unit 32
correspond to the reuse unit.
[0056] Surface wave exciter 20 according to the present exemplary embodiment has a pin-type
stub structure. The pin-type stub structure is a periodic structure including a plurality
of columnar pins horizontally periodically arranged.
[0057] FIG. 5 and FIG. 6 illustrate examples of the pin-type stub structure. Surface wave
exciter 20 illustrated in FIG. 5 includes pins 20a each in the shape of a quadrangular
prism. Surface wave exciter 20 illustrated in FIG. 6 includes pins 20b each in the
shape of a circular cylinder. In surface wave exciter 20, the surface waves can propagate
along in the alinement of the pins, that is, in an arbitrary direction parallel to
the horizontal plane in which the pins are arranged.
[0058] As described above, in high-frequency heating device 1c, microwaves that have not
been absorbed by heating subject 6 are re-supplied to surface wave exciter 20 through
connecting unit 32. In this way, high-frequency heating device 1c is capable of reusing,
for heating a heating subject, microwaves that have not been absorbed by the heating
subject. As a result, the utilization efficiency of microwave energy can be improved.
EMBODIMENT 4
[0059] High-frequency heating device 1d according to Embodiment 4 of the present disclosure
will be described focusing on differences from Embodiment 1. FIG. 7 is a horizontal
cross-sectional view schematically illustrating a configuration of high-frequency
heating device 1d. FIG. 7 schematically illustrates a situation in which microwaves
in the surface wave mode propagate on surface wave exciter 30 and also schematically
illustrates a placement position of heating subject 6 on tray 4 (not illustrated in
FIG. 7).
[0060] High-frequency heating device 1d does not include reflective unit 14 which is the
reuse unit, but includes surface wave exciter 30 which, because of its shape, can
reuse microwaves that have not been absorbed by heating subject 6.
[0061] As illustrated in FIG. 7, surface wave exciter 30 is curved in a U-shape in plan
view. Specifically, surface wave exciter 30 includes straight portion 30a, curved
portion 30b, and straight portion 30c. Heating subject 6 is placed on tray 4 (not
illustrated in the drawings), on and between straight portions 30a and 30c. Straight
portion 30a, curved portion 30b, and straight portion 30c correspond to the first
portion, the second portion, and the third portion, respectively.
[0062] Straight portion 30a extends in a straight line in plan view and propagates, in propagation
direction D1, surface waves S1 obtained from the microwaves supplied through connecting
unit 12. Surface waves S2, which are part of surface waves S1, further propagate on
straight portion 30a without being absorbed by heating subject 6, and reach the terminal
edge of straight portion 30a.
[0063] Curved portion 30b has the shape of a fan with a central angle of 180 degrees in
plan view and connects straight portion 30a and straight portion 30c. Surface waves
S2 that have propagated from straight portion 30a to curved portion 30b in propagation
direction D1 propagate from curved portion 30b to straight portion 30c in propagation
direction D2. In other words, curved portion 30b changes the propagation direction
of surface waves S2. In the present exemplary embodiment, the propagation direction
of surface waves S2 is reversed.
[0064] Straight portion 30c is connected to curved portion 30b and extends in a straight
line in plan view. Straight portion 30c propagates, in propagation direction D2, surface
waves S2 that have been reversed in the propagation direction by curved portion 30b.
[0065] With the above-described configuration, heating subject 6 is heated with surface
waves S1 obtained as a result of propagation, on straight portion 30a, of the microwaves
supplied through connecting unit 12. In addition, heating subject 6 is also heated
with surface waves S2 propagating on straight portion 30c in the propagation direction
reversed by the curved portion 30b.
[0066] In the present exemplary embodiment, the reuse unit is not formed of other members
such as reflective unit 14 and matching unit 22 unlike in Embodiments 1 and 2. Curved
portion 30b and straight portion 30c included in surface wave exciter 30 function
as the reuse unit.
[0067] As described above, high-frequency heating device 1d uses again, for heating heating
subject 6, microwaves that have not been absorbed by heating subject 6. In this way,
high-frequency heating device 1d is capable of reusing, for heating a heating subject,
microwaves that have not been absorbed by the heating subject. As a result, the utilization
efficiency of microwave energy can be improved.
[0068] Although Embodiments 1 to 4 have been described above, the present disclosure is
not limited to these exemplary embodiments.
[0069] For example, in Embodiment 1, reflective unit 14 is disposed so as to cover terminal
edge 17 of surface wave exciter 10. However, another configuration is also applicable
as long as the surface waves can be reflected. For example, reflective unit 14 may
completely cover surface wave exciter 10.
[0070] In Embodiment 1, all metal plates 11 included in surface wave exciter 10 are set
to the same height. However, metal plates 11 covered by reflective unit 14 may be
stepwise reduced in height toward terminal edge 17, for example. With this configuration,
the surface waves can be more accurately reflected.
[0071] In Embodiment 2, the rectenna is given as an example of conversion unit 24. However,
this is not limiting as long as the microwaves can be converted into direct-current
power.
[0072] In Embodiment 3, connecting unit 32 is disposed on power supply edge 33 which is
an end portion of surface wave exciter 20 different from power supply edge 15 and
terminal edge 17. However, power supply edge 33 may be disposed on power supply edge
15 or terminal edge 17.
[0073] In the present disclosure, only surface wave exciter 20 according to Embodiment 3
has a pin-type stub structure. However, surface wave exciters 10 according to Embodiments
1 and 2 and surface wave exciter 30 according to Embodiment 4 may each have the pin-type
stub structure.
[0074] In Embodiment 4, surface wave exciter 30 is U-shaped. However, the shape of surface
wave exciter 30 is not limited to this as long as surface wave exciter 30 changes
the propagation direction of surface waves S2 that have propagated on surface wave
exciter 30.
INDUSTRIAL APPLICABILITY
[0075] The present disclosure is applicable to a microwave oven, a dehydrator, a heating
device for pottery, a garbage disposer, a semiconductor manufacturing device, and
the like.
REFERENCE MARKS IN THE DRAWINGS
[0076]
- 1a, 1b, 1c, 1d
- high-frequency heating device
- 4
- tray
- 6
- heating subject
- 8
- generation unit
- 10, 20, 30
- surface wave exciter
- 12
- connecting unit (first connecting unit)
- 14
- reflective unit (reuse unit)
- 15
- power supply edge (one end portion of surface wave exciter)
- 16
- control unit
- 17
- terminal edge (another end portion of surface wave exciter)
- 20a, 20b
- pin
- 22
- matching unit (reuse unit)
- 23, 31
- microwave transmission line
- 24
- conversion unit (reuse unit)
- 25
- direct-current power transmission line
- 26
- power storage unit
- 30a
- straight portion (first portion)
- 30b
- curved portion (second portion)
- 30c
- straight portion (third portion)
- 32
- connecting unit (second connecting unit and reuse unit)
- 33
- power supply edge
1. A high-frequency heating device (1a; 1b; 1c; 1d) comprising:
a generation unit (8) configured to generate microwaves;
a surface wave exciter (10) including a periodic structure and configured to heat
a heating subject (6) by propagating the microwaves in a surface wave mode;
a first connecting unit (12) which is disposed at one end portion (15) of the surface
wave exciter (10) and through which the microwaves generated by the generation unit
(8) are supplied to the surface wave exciter (10); and
a reuse unit (14) configured to reuse, for heating the heating subject (6), the microwaves
in the surface wave mode that have reached an other end portion (17) of the surface
wave exciter (10), the other end portion (17) being located in a propagation direction
of the microwaves from the one end portion (15) of the surface wave exciter (10),
characterized in that
the reuse unit (14) includes a matching unit (22) disposed at the other end portion
(17) of the surface wave exciter (10) and configured to carry out, by impedance matching,
mode conversion of the microwaves in the surface wave mode that have reached the other
end portion (17).
2. The high-frequency heating device (1a; 1b; 1c; 1d) according to claim 1, wherein
the reuse unit (14) includes a reflective unit (14) disposed at the other end portion
(17) of the surface wave exciter (10) and configured to reflect the microwaves that
have reached the other end portion (17) of the surface wave exciter (10).
3. The high-frequency heating device (1a; 1b; 1c; 1d) according to claim 2, wherein
the reflective unit (14) is a waveguide which covers the other end portion (17) of
the surface wave exciter (10).
4. The high-frequency heating device (1a; 1b; 1c; 1d) according to claim 1, further comprising:
a power storage unit (26) configured to store direct-current power, wherein
the reuse unit (14) further includes a conversion unit (24) configured to convert,
into the direct-current power, the microwaves resulting from the mode conversion by
the matching unit (22), and supply the direct-current power to the power storage unit
(26).
5. The high-frequency heating device (1a; 1b; 1c; 1d) according to claim 1, wherein
the reuse unit (14) further includes: a second connecting unit (32) disposed at one
of end portions of the surface wave exciter (10); and a microwave transmission line
(31) which connects the matching unit (22) and the second connecting unit (32).
6. The high-frequency heating device (1a; 1b; 1c; 1d) according to claim 1, wherein
the surface wave exciter (10) includes: a first portion (30a) which propagates surface
waves obtained from the microwaves supplied through the first connecting unit (12);
a second portion (30b) connected to the first portion (30a) and configured to change
a propagation direction of the surface waves; and a third portion (30c) which is connected
to the second portion (30b) and propagates the surface waves in the propagation direction
that has been changed, and
the reuse unit (14) is the second portion (30b) and the third portion (30c).
7. The high-frequency heating device (1a; 1b; 1c; 1d) according to claim 1, wherein
the periodic structure includes a plurality of columnar pins (20a, 20b) horizontally
periodically arranged.
1. Hochfrequenz-Heizgerät (1a; 1b; 1c; 1d) umfassend:
eine Erzeugungseinheit (8), die dazu konfiguriert ist, Mikrowellen zu erzeugen;
einen Oberflächenwellenerreger (10) einschließlich einer periodischen Struktur und
der dazu konfiguriert ist, ein Heizobjekt (6), durch Ausbreitung der Mikrowellen in
einem Oberflächenwellenmodus, zu erwärmen;
eine erste Verbindungseinrichtung (12), die an einem Endbereich (15) des Oberflächenwellenerregers
(10) angebracht ist und wodurch die von der Erzeugungseinheit (8) erzeugten Mikrowellen
dem Oberflächenwellenerreger (10) zugeführt werden; und
eine Wiederverwendungseinheit (14), die konfiguriert ist, für das Erwärmen des Heizobjektes
(6), die Mikrowellen in dem Oberflächenwellenmodus, die einen anderen Endbereich (17)
des Oberflächenwellenerregers (10) erreicht haben, wiederzuverwenden, wobei der andere
Endbereich (17) sich in einer Ausbreitungsrichtung der Mikrowellen von dem einen Endbereich
(15) des Oberflächenwellenerregers (10) befindet,
gekennzeichnet dadurch, dass
die Wiederverwendungseinheit (14) eine Anpassungseinheit (22) beinhaltet, die am anderen
Endbereich (17) des Oberflächenwellenerregers (10) angebracht ist und konfiguriert
ist, durch Impedanzanpassung, eine Modusumwandlung der Mikrowellen im Oberflächenwellenmodus,
die den anderen Endbereich (17) erreicht haben, durchzuführen.
2. Hochfrequenz-Heizgerät (1a; 1b; 1c; 1d) nach Anspruch 1, wobei
die Wiederverwendungseinheit (14) eine reflektierende Einheit (14) beinhaltet, die
am anderen Endbereich (17) des Oberflächenwellenerregers (10) angebracht ist und konfiguriert
ist, die Mikrowellen, die den anderen Endbereich (17) des Oberflächenwellenerregers
(10) erreicht haben, zu reflektieren.
3. Hochfrequenz-Heizgerät (1a; 1b; 1c; 1d) nach Anspruch 2, wobei
die reflektierende Einheit (14) ein Wellenleiter ist, der den anderen Endbereich (17)
des Oberflächenwellenerregers (10) abdeckt.
4. Hochfrequenz-Heizgerät (1a; 1b; 1c; 1d) nach Anspruch 1, ferner umfassend:
eine Energiespeichereinheit (26), die konfiguriert ist, Gleichstrom zu speichern,
wobei
die Wiederverwendungseinheit (14) ferner eine Umwandlungseinheit (24) beinhaltet,
die konfiguriert ist, die Mikrowellen, die durch die Modusumwandlung durch die Anpassungseinheit
(22) entstehen, in Gleichstrom umzuwandeln, und den Gleichstrom in die Energiespeichereinheit
(26) zu leiten.
5. Hochfrequenz-Heizgerät (1a; 1b; 1c; 1d) nach Anspruch 1, wobei
die Wiederverwendungseinheit (14) ferner Folgendes beinhaltet: eine zweite Verbindungseinrichtung
(32), die am einen Endbereich des Oberflächenwellenerregers (10) angebracht ist; und
eine Mikrowellen-Übertragungsleitung (31), die die Anpassungseinheit (22) und die
zweite Verbindungseinrichtung (32) verbindet.
6. Hochfrequenz-Heizgerät (1a; 1b; 1c; 1d) nach Anspruch 1, wobei
der Oberflächenwellenerreger (10) Folgendes beinhaltet: einen ersten Abschnitt (30a),
der Oberflächenwellen, erhalten durch die Mikrowellen, die durch die erste Verbindungseinrichtung
(12) zugeführt werden, verbreitet; einen zweiten Abschnitt (30b), verbunden mit dem
ersten Abschnitt (30a) und konfiguriert, eine Ausbreitungsrichtung der Oberflächenwellen
zu verändern; und einen dritten Abschnitt (30c), der mit dem zweiten Abschnitt (30b)
verbunden ist und die Oberflächenwellen in die veränderte Ausbreitungsrichtung verbreitet,
und
die Wiederverwendungseinheit (14) der zweite Abschnitt (30b) und der dritte Abschnitt
(30c) ist.
7. Hochfrequenz-Heizgerät (1a; 1b; 1c; 1d) nach Anspruch 1, wobei
die periodische Struktur eine Vielzahl von säulenförmigen Bolzen (20a, 20b) beinhaltet,
die periodisch horizontal angeordnet sind.
1. Dispositif de chauffage à haute fréquence (1a ; 1b ; 1c ; 1d) comprenant :
une unité de génération (8) conçue pour générer des microondes ;
un excitateur d'onde de surface (10) comprenant une structure un sujet de périodique
et conçu pour chauffer un objet à chauffer (6) par la propagation des microondes dans
un mode d'onde de surface ;
une première unité de connexion (12) qui est disposée dans une première partie d'extrémité
(15) de l'excitateur d'onde de surface (10) et par laquelle les microondes générées
par l'unité de génération (8) sont fournies à l'excitateur d'onde de surface (10)
; et
une unité de réutilisation (14) conçue pour réutiliser, pour le chauffage de l'objet
à chauffer (6), les microondes dans le mode d'onde se surface qui ont atteint une
autre partie d'extrémité (17) de l'excitateur d'onde de surface (10), l'autre partie
d'extrémité (17) étant située dans une direction de propagation des microondes depuis
la première partie d'extrémité (15) de l'excitateur d'onde de surface (10),
caractérisé en ce que
l'unité de réutilisation (14) comprend une unité d'appariement (22) disposée à l'autre
partie d'extrémité (17) de l'excitateur d'onde de surface (10) et conçue pour effectuer,
par appariement d'impédance, une conversion de mode des microondes dans le mode d'onde
de surface qui ont atteint l'autre partie d'extrémité (17).
2. Dispositif de chauffage à haute fréquence (1a ; 1b ; 1c ; 1d) selon la revendication
1, dans lequel l'unité de réutilisation (14) comprend une unité de réflexion (14)
disposée à l'autre partie d'extrémité (17) de l'excitateur d'onde de surface (10)
et conçue pour réfléchir les microondes qui ont atteint l'autre partie d'extrémité
(17) de l'excitateur d'onde de surface (10).
3. Dispositif de chauffage à haute fréquence (1a ; 1b ; 1c ; 1d) selon la revendication
2, dans lequel l'unité de réflexion (14) est un guide d'onde qui recouvre l'autre
partie d'extrémité (17) de l'excitateur d'onde de surface (10).
4. Dispositif de chauffage à haute fréquence (1a ; 1b ; 1c ; 1d) selon la revendication
1, comprenant en outre : une unité de stockage d'énergie (26) conçue pour stocker
une alimentation en courant direct, l'unité de réutilisation (14) comprenant en outre
une unité de conversion (24) conçue pour convertir, dans l'alimentation en courant
direct, les microondes résultant de la conversion de mode par l'unité d'appariement
(22), et fournir l'alimentation en courant direct à l'unité de stockage d'énergie
(26).
5. Dispositif de chauffage à haute fréquence (1a ; 1b ; 1c ; 1d) selon la revendication
1, dans lequel l'unité de réutilisation (14) comprend en outre : une deuxième unité
de connexion (32) disposée à une des parties d'extrémité de l'excitateur d'onde de
surface (10) ; et une ligne de transmission de microonde (31) qui connecte l'unité
d'appariement (22) et la deuxième unité de connexion (32).
6. Dispositif de chauffage à haute fréquence (1a ; 1b ; 1c ; 1d) selon la revendication
1, dans lequel l'excitateur d'onde de surface (10) comprend : une première partie
(30a) qui propage des ondes de surface obtenues depuis les microondes fournies par
le biais de la première unité de connexion (12) ; une deuxième partie (30b) connectée
à la première partie (30a) et conçue pour modifier une direction de propagation des
ondes de surface ; et une troisième partie (30c) qui est connectée à la deuxième partie
(30b) et propage les ondes de surface dans la direction de propagation qui a été modifiée,
et l'unité de réutilisation (14) représente la deuxième partie (30b) et la troisième
partie (30c).
7. Dispositif de chauffage à haute fréquence (1a ; 1b ; 1c ; 1d) selon la revendication
1, dans lequel la structure périodique comprend une pluralité de tiges colonnaires
(20a, 20b) agencées périodiquement de manière horizontale.