JP5460747B2 - Induction heating cooker - Google Patents

Description

  The present invention relates to an induction cooking device characterized by cooling an inverter board and an induction heating coil.

  Conventionally, an induction heating cooker induces eddy current with high frequency magnetic flux generated by flowing high frequency current through an induction heating coil, and heats an object to be heated with Joule heat generated thereby. In this induction heating cooker, when a heated object such as a pan is heated, a control board such as an induction heating coil or an inverter board that controls the induction heating coil also generates heat. And in order to perform these cooling, it is common to mount a cooling fan in the induction heating cooking appliance, and to cool by ventilation.

  In recent years, this heated object has been diversified, and there are not only iron pots but also non-magnetic stainless steel pots, copper pots, aluminum pots, and the like. Along with this, the induction heating cooker tends to increase heat generation due to loss in order to realize cooking according to the type of object to be heated, and the effective resistance increases due to the skin effect to increase the frequency, resulting in large heat generation. In addition, the self-heating of the induction heating coil also increases. In order to improve the performance of such an induction heating cooker, it is required to efficiently cool the heating components such as the induction heating coil and the control board that controls the induction heating coil. Therefore, various induction heating cookers have been proposed in which the induction heating coil is efficiently cooled.

  As such, “an insulating plate for placing an object to be heated is provided on the upper surface of the main body, a plurality of heating coils, an output control board, a cooling fan for cooling them, and the output are provided below the insulating plate. In an induction heating cooker provided with a substrate case for fixing the control substrate and an intake port and an exhaust port opened upward at the rear of the main body, an output control substrate and a cooling fan are disposed inside the substrate case, A board case intake port is provided at a position corresponding to the intake port at the rear of the main body, a plurality of cooling ports are provided at positions corresponding to the plurality of heating coils, and the cooling port is opposed to a side portion of the heating coil. An induction heating cooker characterized by having been configured "has been proposed (for example, see Patent Document 1).

  This induction heating cooker has an output control board and a cooling fan arranged inside the board case, has a board case inlet at a position corresponding to the rear inlet of the main body, and a plurality of positions at positions corresponding to a plurality of heating coils. Since it has a cooling port, and this cooling port is configured to face the side of the heating coil, it suppresses the loss of cooling air, improves the cooling efficiency of the heating coil and output control board, and is easy to assemble This also improves the cost and enables cost reduction.

  In addition, an insulating plate for placing an object to be heated is provided on the upper surface of the main body, a heating means, an output control board, and a cooling fan for cooling them are provided below the insulating plate, and directed upward at the rear of the main body. In an induction heating cooker provided with an air intake opening and an air exhaust opening, a resin storage case is installed inside the main body, and an output control board and a cooling fan are arranged inside the storage case for storage. A case inlet corresponding to the inlet is provided in the upper part of the case, a cooling opening corresponding to the heating means is provided in the upper part of the storage case, and an air passage leading from the case inlet to the cooling outlet is formed in the storage case. An induction heating cooker characterized by this has been proposed (see, for example, Patent Document 2).

  In this induction heating cooker, a resin storage case is installed inside the main body, an output control board and a cooling fan are arranged inside the storage case, and a case intake port corresponding to the intake port is provided above the storage case. With a cooling port corresponding to the heating means at the top of the storage case, and further, an air passage leading from the case intake port to the cooling port is formed in the storage case, so that the loss of cooling air is suppressed, The cooling efficiency of the heating means and the output control board is improved, the assemblability is improved, and the cost can be reduced.

JP 2003-86338 A (page 3, FIG. 2) JP 2003-86339 A (page 3, FIG. 2)

  By the way, the induction heating cooker has a demand for a shape that can be installed not only in an efficient manner but also in cooling various heat-generating components such as a control board that controls the induction heating coil. ing. Further, since maintenance such as repair and replacement of components (induction heating coil, cooling fan, control board) arranged inside the induction heating cooker can be easily performed, further improvement in assemblability is desired. .

  The induction heating cookers described in Patent Document 1 and Patent Document 2 are characterized by the location of the cooling opening formed in the substrate case, and the two induction heating coils are cooled by one cooling fan. Yes. Therefore, there is a problem that the degree of cooling of the induction heating coil varies depending on the position of the induction heating coil provided inside the induction heating cooker body. That is, since the other induction heating coil is cooled by the cooling air that has cooled the induction heating coil closer to the cooling fan, it was not possible to uniformly cool all of the induction heating coils.

  In addition, in such a configuration, when an induction heating coil is added to the induction heating cooker, it must be replaced with a board case prepared corresponding to the number of induction heating coils, and can be easily assembled. There was a problem that could not. Furthermore, when an induction heating coil is added, two or more induction heating coils must be cooled by a single cooling fan, resulting in a problem that the cooling efficiency is further deteriorated.

  The present invention has been made to solve the above-described problems, and can be installed in various places and can be uniformly cooled with a plurality of induction heating coils installed in the induction heating cooker. It provides an induction heating cooker excellent in the above.

An induction heating cooker according to the present invention includes an induction heating coil for heating an object to be heated, an inverter board having a high frequency power supply for supplying high frequency power to the induction heating coil, and a coil base on which the induction heating coil is placed. A fan that cools the induction heating coil and the inverter board, a duct that discharges air blown from the fan toward the lower surface of the induction heating coil, and a vent hole, the induction heating coil, a housing for accommodating the inverter board and the fan therein, and a plurality of coil base support for holding the coil base, and at least one or more multi have support portions than the number of the coil base support The support board is selectively used, and the inverter board, the fan, and the duct are arranged on the same plane and sucked from the vent hole. Air, the inverter board, the fan, and wherein the passing the order of the induction heating coil.

  An induction heating cooker according to the present invention includes an induction heating coil for heating an object to be heated, an inverter board having a high frequency power supply for supplying high frequency power to the induction heating coil, and a coil base on which the induction heating coil is placed. A fan that cools the induction heating coil and the inverter board, a vent hole, a housing that houses the induction heating coil, the inverter board, and the fan, and a coil base for holding the coil base A plurality of coil base holding parts and at least one support part larger than the number of the coil base holding parts, and the support part is selectively used, so that the position of the support part need not be changed. The coil pitch can be changed.

It is a disassembled perspective view which shows schematic structure of the induction heating cooking appliance which concerns on Embodiment 1. FIG. It is a disassembled perspective view which shows the state which decomposed | disassembled the induction heating cooking appliance into the component. It is a schematic block diagram which shows an example of the control unit mounted in the induction heating cooking appliance which concerns on Embodiment 2. It is an expansion perspective view which shows the state which expanded a part of induction heating cooking appliance which concerns on Embodiment 3. FIG. It is a disassembled perspective view which shows schematic structure of the induction heating cooking appliance which cooled the inverter board | substrate arrange | positioned at right and left with one heat pipe. It is the top view which looked at the induction heating cooking appliance from the top. It is a longitudinal cross-sectional view which shows the longitudinal cross-section of the induction heating cooking appliance which concerns on Embodiment 4. It is a schematic block diagram which shows an example of the coil unit accommodated in an induction heating cooking machine. It is a schematic block diagram which shows an example of the coil unit accommodated in the induction heating cooking appliance which concerns on Embodiment 5. FIG. It is a schematic block diagram which shows an example of the coil unit accommodated in the induction heating cooking appliance which concerns on Embodiment 6. FIG. It is a disassembled perspective view which shows the state which decomposed | disassembled the coil unit.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
Embodiment 1 FIG.
FIG. 1 is an exploded perspective view showing a schematic configuration of induction heating cooker 100 according to Embodiment 1 of the present invention. FIG. 2 is an exploded perspective view showing a state in which the induction heating cooker 100 is disassembled into component parts. This induction heating cooker 100 has a built-in type (system kitchen integrated type) in which a cooking pan mounting part by induction heating is provided on the left and right and a cooking pan mounting part by a radiant heater (RH) heating is provided on the back center. The case of an IH cooking heater will be described as an example. Based on FIG.1 and FIG.2, the structure and operation | movement of the induction heating cooking appliance 100 are demonstrated.

  As shown in FIG. 1, the induction heating cooker 100 is provided with a coil base 12, a duct 13, a fan 14, a radiant heater 20, and an inverter board 15 (power supply board) in a housing 10. . Here, the case where the air holes 17 for sucking and exhausting air are formed on the front surface and the back surface of the housing (unit case) 10 is shown as an example, but the present invention is not limited to this. For example, intake and exhaust may be performed by opening the front surface and the back surface of the housing 10. Further, the number and size of the vent holes 17 are not particularly limited.

  An induction heating coil 11 for heating an object to be heated such as a pan or a frying pan is placed on the coil base 12. A duct 13 for cooling the induction heating coil 11 from the lower side is provided below the coil base 12. A fan 14 is connected to the duct 13 at an air inlet. Further, the inverter board 15 includes a high frequency power supply unit for supplying high frequency power to the induction heating coil 11 and a control unit that controls a drive motor (not shown) that drives the induction heating coil 11, the radiant heater 20, and the fan 14. It is configured. The high-frequency power supply unit includes a circuit formed of heat-generating components such as a switching element and one or more capacitors connected to the circuit.

  In the first embodiment, the induction heating coil 11 is provided with a duct 13, a fan 14, and an inverter board 15 according to the number. That is, as shown in FIG. 1, two sets of the duct 13, the fan 14, and the inverter board 15 are provided corresponding to the two induction heating coils 11. As described above, since one induction heating coil 11 is provided with one duct 13, one fan 14, and one inverter board 15, all of the induction heating coils 11 provided in the housing 10 are provided. It is possible to cool uniformly and efficiently.

  In addition, maintenance such as repair and replacement of components such as the induction heating coil 11, the duct 13, the fan 14, and the inverter board 15 disposed inside the housing 10 can be performed for each component. Furthermore, since these components can be maintained independently, the assembly of the induction heating cooker 100 is improved. The inverter board 15 is provided with fins 16 for effectively cooling the high-frequency power supply unit installed on the inverter board 15.

  In the first embodiment, one or more capacitors constituting the high frequency power supply unit are arranged inside the housing 10 as the capacitor unit 18 separately from the inverter board 15. In general, a power supply substrate such as an inverter substrate is provided with a high-frequency power supply unit for flowing a high-frequency current through the induction heating coil 11. The high-frequency power supply unit includes a large-capacity capacitor as a component. In addition to the large-capacity capacitor, a plurality of capacitors are disposed on the power supply board, blocking air flowing above the power supply board and narrowing the air path. That is, the capacitor disposed on the power supply board increases the volume of the power supply board, increases the pressure loss, and cannot ensure a sufficient air path for the air flowing above the power supply board.

  Therefore, in the first embodiment, one or more capacitors are not placed on the inverter board 15 and are arranged in the housing 10 separately from the inverter board 15. By doing so, large parts placed on the inverter board 15 are reduced, and an air passage for the air flowing above the parts can be secured. Moreover, since an air path can be ensured, air can be smoothly flowed to the fins 16 provided on the inverter board 15. In addition, although the case where the capacitor | condenser part 18 is arrange | positioned between the inverter board | substrate 15 and the duct 13 is shown as an example here, it is not limited to this. For example, the capacitor unit 18 may be disposed anywhere as long as it is an empty space inside the housing 10.

  Furthermore, in the first embodiment, two induction heating coils 11 are arranged on the front side of the housing 10, and a radiant heater 20, which is a heating means different from the induction heating coil 11, is arranged on the back side. And the inverter board | substrate 15 is arrange | positioned in the both sides of the radiant heater 20 behind this induction heating coil 11. FIG. Therefore, the vacant space in the housing 10 is effectively used to secure the area of the inverter board 15 and to reduce the size of the housing 10. That is, since the inverter board 15 and the induction heating coil 11 are not arranged in a stacked manner but are arranged in a plane, the housing 10 can be downsized.

  The induction heating coil 11 placed on the coil base 12 generates an eddy current in the object to be heated placed above the induction heating coil 11 due to the lines of magnetic force generated by the current, and causes the object to be heated to generate heat. It has become. The coil base 12 serves to place and hold the induction heating coil 11. The coil base 12 is preferably provided with a ferrite for preventing the magnetic field lines generated from the induction heating coil 11 from flowing downward, and a temperature sensor for detecting the temperature state of the object to be heated.

  The fan 14 blows air that cools the induction heating coil 11. In this Embodiment 1, although the case where the fan 14 is an axial flow fan is shown as an example, it is not limited to this. For example, the fan 14 may be a centrifugal fan represented by a sirocco fan. The fan 14 is connected to the suction port 15 of the duct 13, and feeds air for cooling the induction heating coil 11 into the duct 13.

  A discharge hole is formed in the upper surface of the duct 13, and air is ejected from the discharge hole to cool the induction heating coil 11 from the lower side. An air passage for cooling air sent from the fan 14 is formed in the duct 13 so that the cooling air is uniformly ejected from the discharge holes formed on the upper surface. Note that the number and size of the discharge holes are not particularly limited. Further, the shape of the duct 13 is not particularly limited, and it is sufficient that the coil base 12 can be placed and air can be blown from the lower side of the induction heating coil 11.

  The radial heater 20 is supplied with AC power of a normal commercial frequency, and the heater itself generates heat, so that the object to be heated is heated by the radiant heat. In Embodiment 1, although the case where the heating means different from the induction heating coil 11 is the radiant heater 20 is shown as an example, the present invention is not limited to this. The coil base 12 is supported from below by a support member (not shown) and is pressed so as to be in close contact with a top plate (not shown). Moreover, this support member should just support the coil base 12, and does not specifically limit a kind and number.

  Note that an operation panel (not shown) for receiving an instruction from the user is provided on the front surface of the housing 10. That is, when an instruction is given from the user via the operation panel, the control unit placed on the inverter board 15 controls the induction heating coil 11, the radiant heater 20, the drive motor of the fan 14 and the like based on the contents of the instruction. It is supposed to be. Further, the control unit controls heating / discharging of the induction heating coil 11 and the radiant heater 20 based on the temperature detected from a temperature sensor (not shown).

  Here, a case where a plurality of air holes are formed on the front surface and the back surface of the housing 10 is shown as an example, but the present invention is not limited to this. For example, the front air holes may not be provided, and the front and back air holes may be eliminated, and the air holes may be formed in the rear portion of the top plate (not shown). In addition, the air holes may not be used, and intake and exhaust may be performed by opening the front surface and the back surface. In addition, this top plate should just be formed with the insulator, for example, may comprise heat-resistant glass.

Next, cooling of the induction heating coil 11 and the inverter board 15 will be briefly described.
First, the fan 14 sucks air from the vent hole 17 on the back surface of the housing 10. At that time, the air cools the inverter board 15 via the fins 16. The fin 16 takes heat from the air and cools the inverter board 15. Then, this air is sent into the duct 13 to cool the induction heating coil 11. Note that an air path that cools the radiant heater 20 with air that has cooled the induction heating coil 11 may be formed in the housing 10.

  The air sent into the duct 13 is ejected from the discharge hole and collides with the lower surface of the coil base 12 to cool the induction heating coil 11. Since each component is also provided according to the number of induction heating coils 11 provided in the housing 10, the induction heating coil 11 can be cooled uniformly and efficiently. The air that has cooled the induction heating coil 11 cools the radiant heater 20 and is discharged outside the housing 10.

Embodiment 2. FIG.
FIG. 3 is a schematic configuration diagram illustrating an example of the control unit 30 housed in the induction heating cooker 200 according to Embodiment 2 of the present invention. Based on FIG. 3, the control unit 30 will be described in the characteristic part of the second embodiment. In the second embodiment, differences from the first embodiment will be mainly described, and the same parts as those in the first embodiment will be denoted by the same reference numerals and the description thereof will be omitted.

  The control unit 30 is configured by mounting a substrate base lid 32 on a substrate base 31 on which the inverter substrate 15a is placed. Further, the control unit 30 is provided with a side wall so that air taken into the control unit 30 does not leak. A fan 14a and a capacitor portion 18a are disposed inside the side wall. The inverter board 15a is provided with fins 16a. By doing so, the control unit 30 can be incorporated into the housing 10 and the control unit 30 can be easily replaced. Therefore, maintenance of components inside the control unit 30 can be easily performed, and the assemblability is further improved.

  The control unit 30 is completed by combining the substrate base 31 and the substrate base lid 32 and enclosing the side surfaces with side walls, and an air flow path for cooling the inverter substrate 15 is formed therein. . Further, since one or more capacitors constituting the high frequency power supply unit are not arranged on the inverter board 15a, the control unit 30 can be made thin.

  And if the fan 14a is arrange | positioned in the position lower than the highest component, air can be taken in using the space which can be formed in the upper part of the fan 14a. Therefore, in the second embodiment, an example is shown in which a centrifugal fan (sirocco fan) is used as the fan 14a. Also, if a centrifugal fan is used, air can be taken in from the upper side of the fan 14a using the space created in the control unit 30 and blown out horizontally, so that a smooth air flow with little pressure loss can be obtained. Can be formed.

  In the second embodiment, since the inverter board 15a is arranged inside the control unit 30, there is no air leakage from the control unit 30, and the inverter board 15a can be efficiently cooled. And the air which cooled the inverter board | substrate 15a is taken in from the upper side of the fan 14a, and since the air is ejected horizontally to the lower side of the coil base 12, the induction heating coil 11 mounted in the coil base 12 is cooled efficiently. can do.

  Moreover, since the control unit 30 is provided according to the number of the induction heating coils 11 provided in the housing 10, the inverter board 15 a and the induction heating coil 11 can be further efficiently cooled. Therefore, the inverter board 15a and the induction heating coil 11 can be efficiently cooled without forming a complicated air passage that circulates the air that cools the inverter board 15a and the induction heating coil 11 in the housing 10. .

Embodiment 3 FIG.
FIG. 4 is an enlarged perspective view showing a state in which a part of induction heating cooker 300 according to Embodiment 3 of the present invention is enlarged. Based on FIG. 4, the case where the heat pipe 40 which is the characteristic part of Embodiment 3 is arrange | positioned in the housing | casing 10 is demonstrated. In the third embodiment, differences from the first and second embodiments will be mainly described, and the same parts as those in the first and second embodiments will be denoted by the same reference numerals and the description will be given. Shall be omitted.

  The heat pipe 40 is a heat transfer element that transfers heat to a distant place at a high speed. The heat pipe 40 is a pipe having a capillary structure on its inner wall, and the inside has a vacuum structure. A small amount of water or a refrigerant such as alternative chlorofluorocarbon is sealed inside. When one end of the heat pipe 40 is heated, the liquid inside is evaporated and vaporized. At this time, heat is taken in as vaporization heat (latent heat). Next, this heat moves to the low temperature part at high speed and is cooled. Then, the vaporized refrigerant returns to a liquid. At this time, the incorporated heat is released.

  In the third embodiment, the inverter board 15b and the induction heating coil 11 are efficiently cooled using the properties of the heat pipe 40. The order of cooling the inverter board 15b and the induction heating coil 11 is determined in consideration of the heat resistant temperature of the inverter board 15b and the induction heating coil 11. Generally, since the heat resistance temperature of the inverter board 15b is lower than the heat resistance temperature of the induction heating coil 11, the induction heating coil 11 is cooled after the inverter board 15b is cooled.

  However, in order to realize downsizing of the induction heating cooker 300, air vents and air inlets for cooling the inverter board 15b and the induction heating coil 11 may be limited. That is, an air path that cools the inverter board 15 b and then cools the induction heating coil 11 may not be formed in the housing 10. Therefore, in the third embodiment, the heat pipe 40 is provided in the housing 10 so that the inverter board 15b and the induction heating coil 11 are efficiently cooled.

  Here, one end (heat dissipating part 41) of the heat pipe 40 is disposed in the vicinity of the air vent 45 formed on the front surface side of the housing 10, and the other end (heat receiving part 42) of the heat pipe 40 is disposed above the inverter board 15b. The heat is exchanged between the air taken in from the vent hole 45 and the refrigerant in the heat radiating part 41, takes in cold heat into the heat pipe 40, and transports heat to the heat receiving part 42 side, and the refrigerant in the heat receiving part 42 The inverter board 15b is cooled by exchanging heat with air in the vicinity of the inverter board 15b.

  In the first embodiment and the second embodiment, the inverter board 15 and the inverter board 15a are arranged on the back side of the casing 10, air is taken in from the back side of the casing 10, and the inverter board 15 and the inverter board 15a are cooled. In the third embodiment, the case where the induction heating coil 11 is cooled is shown as an example. However, in the third embodiment, the inverter board 15b is arranged on the rear side of the casing 10, but air is taken in from the rear side of the casing 10. It is assumed that there is no such case (for example, when air is taken in from the front side of the housing 10).

  As shown in FIG. 4, the inverter board 15 b is arranged on the back side of the housing 10, but when air is taken in from the front side of the housing 10, the induction heating coil 11 is first cooled, Thereafter, the inverter board 15b is cooled. If it does so, although the induction heating coil 11 can be cooled, the inverter board | substrate 15b cannot be cooled efficiently. Therefore, in the third embodiment, the heat pipe 40 is provided, and the inverter board 15b is efficiently cooled using the property.

  Here, although the case where the air which cools the inverter board | substrate 15b and the induction heating coil 11 was taken in from the vent hole 45 formed in the front side of the housing | casing 10 was shown as an example, it is not limited to this. For example, a vent hole for taking in air for cooling the inverter board 15 b and the induction heating coil 11 may be formed on the side surface side of the housing 10. In other words, one end (heat radiation part 41) of the heat pipe 40 may be disposed at a place where air for cooling the inverter board 15b and the induction heating coil 11 is taken in. If this heat dissipating part 41 is arranged in an empty space in the casing 10 in the vicinity of the air vent 45, the inverter board 15b and the induction heating coil 11 can be efficiently cooled while the volume of the casing 10 is sufficiently large. Can be secured.

  FIG. 5 is an exploded perspective view showing a schematic configuration of an induction heating cooker 300a configured to cool the inverter board 15b arranged on the left and right with one heat pipe 40a. FIG. 6 is a plan view of the induction heating cooker 300a as viewed from above. A case where the heat pipe 40a, which is a characteristic part of the third embodiment, is arranged in the housing 10 will be described with reference to FIGS. In addition, about the basic structure of the induction heating cooking appliance 300a, since it is the same as that of the induction heating cooking appliance 300, description is abbreviate | omitted.

  In the induction heating cooker 300, an example is shown in which the number of heat pipes 40, the heat radiating unit 41, and the heat receiving unit 42 corresponding to the inverter board 15b and the induction heating coil 11 provided in the housing 10 are provided. If it does in this way, depending on the number of induction heating coils 11 provided in case 10, it may be difficult to realize size reduction of induction heating cooking appliance 300. There is a limit to the space of the casing 10 in which the induction heating coil 11 is accommodated, and in order to secure a volume necessary for cooling the induction heating coil 11 and the inverter board 15b, the structure accommodated in the casing 10 is used. It is preferable to reduce the number of parts.

  Therefore, in the induction heating cooker 300a shown in FIGS. 5 and 6, the two inverter boards 15b are cooled by one heat pipe 40a. In this induction heating cooker 300a, a heat radiating portion 41a is arranged in the vicinity of the center of a vent 45a formed on the front side in the housing 10, and a heat receiving portion 42a arranged on the upper side of the left and right inverter boards 15b therefrom. It is designed to transport heat. That is, the heat receiving part 42a is arrange | positioned at the both ends of the heat pipe 40a, the thermal radiation part 41a is arrange | positioned in the middle of the heat pipe 40a, and the two inverter board | substrates 15b are cooled with one heat pipe 40a.

  By doing so, it is not necessary to arrange the plurality of heat radiating portions 41a in the housing 10, and the space in the housing 10 can be used effectively. Similarly, since the two inverter boards 15b are cooled by one heat pipe 40a, efficient cooling can be achieved, miniaturization can be realized, and cost can be further reduced. In addition, although the case where the two inverter boards 15b were cooled was demonstrated to the example, it is not limited to this. For example, three or more inverter boards 15 b may be arranged in the housing 10.

  In the third embodiment, the case where the fan 14b disposed in the housing 10 is an axial fan is shown as an example, but the present invention is not limited to this. For example, a centrifugal fan such as a sirocco fan may be arranged. When a centrifugal fan is disposed, the duct 13 shown in the first embodiment may be provided together. Moreover, you may apply the control unit 30 demonstrated in Embodiment 2 to the induction heating cooking appliance 300 and the induction heating cooking appliance 300a. Further, in each of the above embodiments, the case where the induction heating cooker is used for a built-in type (system kitchen integrated type) IH cooking heater has been described as an example. However, the present invention is not limited to this. Needless to say, the same effects can be obtained even when used in a cooking heater.

Embodiment 4 FIG.
FIG. 7 is a longitudinal sectional view showing a longitudinal section of induction heating cooker 400 according to Embodiment 4 of the present invention. FIG. 8 is a schematic configuration diagram showing an example of the coil unit 54 housed in the induction heating cooking machine 400. The coil unit 54 that is a characteristic part of the fourth embodiment will be described with reference to FIGS. In the fourth embodiment, differences from the first to third embodiments will be mainly described, and the same parts as those in the first to third embodiments will be denoted by the same reference numerals and the description thereof will be omitted. It shall be.

  As shown in FIG. 7, a jet port 50 for cooling the induction heating coil 11 from below is formed on the upper surface of the duct 13 (cooling duct). That is, the duct 13 discharges cooling air that cools the induction heating coil 11 from below. A duct claw portion 51 is formed on the upper surface or outer peripheral surface of the duct 13 so that the coil base 12 is locked. That is, the coil base 12 is held by the duct claw portion 51 being locked to the locking portion 52 provided on the outer peripheral surface of the coil base 12. Further, the coil spring 53 is interposed between the coil base 12 and the duct 13 and is urged in a direction to push up the coil base 12.

  The coil unit 54 includes a plurality of coil springs 53, a coil base 12 on which the induction heating coil 11 is placed, and a duct 13. In the fourth embodiment, a gap 70 is provided between the side surface of the duct 13, which is the outermost peripheral surface of the coil unit 54, and the housing 10, so that the coil unit 54 is placed inside the housing 10. For example, it is configured to be fixed with screws or the like (not shown). That is, a gap 70 is provided between the coil unit 54 and the side inner wall surface of the housing 10 to fix the coil unit 54 to the inside of the housing 10.

  Further, as shown in FIG. 8, a slit portion 55, which is a slit-like concave portion having a thickness in the front-rear direction, is formed in the duct 13 constituting the bottom portion of the coil unit 54, and is formed below the duct 13. A flange portion 56, which is a rib whose longitudinal direction is the left-right direction, is formed on the bottom surface of the housing 10, and the flange portion 56 is slidably fitted (engaged) with the slit portion 55. Good. In addition, although the case where this flange part 56 is formed in the bottom face of the housing | casing 10 is shown as an example, it is not limited to this. For example, the flange portion 56 may be formed on any horizontal surface provided inside the housing 10. Therefore, the coil unit 54 can be translated along the flange portion 56 with respect to the left-right direction of the housing 10.

  In addition, the flange part 56 is not limited to what formed the cut and raised in the bottom face of the housing | casing 10. FIG. For example, an L-shaped flange may be fixed by welding or the like. FIG. 7 shows the coil unit 54 only on one side (left side), but the coil unit 54 is also provided on the right side. That is, the coil unit 54 is provided and configured symmetrically.

  With this configuration, the coil units 54 provided at the left and right positions in the housing 10 can be translated in the left and right directions of the housing 10, respectively. Therefore, the distance between the left and right coil units 54 can be arbitrarily changed. There are models of IH cooking heaters that use different sizes of glass depending on the shape of the kitchen in which they are placed. In such models where the size of the glass changes, the distance between the coils drawn on the glass also changes.

  Therefore, in the fourth embodiment, since the distance between the internal coil units 54 can be arbitrarily changed in accordance with the distance between the coils drawn on the glass, it is necessary to make parts for different types of glass. Since the coil unit 54 can be shared, the manufacturing cost can be kept low. Furthermore, by providing a guide (slit portion 55 and flange portion 56) so that the displacement in the front-rear direction in the housing 10 is suppressed and the parallel movement is possible only in the left-right direction, the coil pitch can be changed suddenly during assembly. Even when it is performed, the unit can be easily moved correctly without shifting the front-rear position.

  In FIG. 8, the flange portion 56 and the slit portion 55 are fitted to each other to prevent the coil unit 54 from shifting in the front-rear direction in the housing 10 and to have a guide shape that can be translated only in the left-right direction. Thus, even when the coil pitch is suddenly changed during assembly, the unit can be easily moved correctly without shifting the front-rear position. Therefore, the assembly property of the induction heating cooker 400 is improved.

Embodiment 5 FIG.
FIG. 9 is a schematic configuration diagram illustrating an example of a coil unit housed in the induction heating cooker 500 according to Embodiment 5 of the present invention. Based on FIG. 9, the coil base holding method, which is a characteristic part of the fifth embodiment, will be described. In the fifth embodiment, differences from the first to fourth embodiments will be mainly described, and the same parts as those in the first to fourth embodiments are denoted by the same reference numerals and the description thereof is omitted. It shall be.

  In FIG. 9, the coil base 12 on which the induction heating coil 11 is placed is held by a coil spring 53 engaging with a plurality of coil base holding portions 57 provided on the bottom surface or side surface of the coil base 12. The coil spring 53 is positioned by engaging with spring locking portions 58a to 58c provided below the coil spring 53. That is, the spring locking portions 58 a to 58 c function as a support portion that supports the coil spring 53. Furthermore, the spring locking portions 58a to 58c are fixed in advance to the bottom surface of the housing 10 with screws or the like (not shown), or are formed by raising the bottom surface of the housing 10.

  In addition, a spring locking portion 58d is provided in the housing 10 so as to be at least one more than the number of coil base support portions 57 provided on the coil base 12, as shown in FIG. Yes. That is, the support position of the coil base 12 can be changed by selectively using the spring locking portions 58a to 58d. Therefore, it is possible to arrange the coil base 12 in accordance with glass surfaces subjected to different printing and glass surfaces having different sizes. Further, since the support position of the coil base 12 can be changed, parts can be shared and the manufacturing cost can be reduced.

Embodiment 6 FIG.
FIG. 10 is a schematic configuration diagram showing an example of a coil unit housed in induction heating cooking appliance 600 according to Embodiment 6 of the present invention. FIG. 11 is an exploded perspective view showing a state where the coil unit is disassembled. Based on FIG.10 and FIG.11, the assembly structure of the coil unit which is the characteristic part of Embodiment 6 is demonstrated. In the sixth embodiment, the difference from the first to fifth embodiments will be mainly described, and the same parts as those in the first to fifth embodiments will be denoted by the same reference numerals and the description thereof will be omitted. It shall be.

  As shown in FIG. 10, the unit base 59 can mount a coil base 12 on which the induction heating coil 11 is mounted and a duct 13 (cooling duct) disposed below the coil base 12. . In addition, the unit base 59 is configured such that the fan 14 and the inverter board 15 can also be placed thereon. Further, a coil unit is formed in which the coil base 12 and the duct 13 are engaged so as to be integrated. On the unit base 59, the coil unit, the inverter board 15, and the fan 14 are placed. In addition, in FIG. 10, although the structure of only the one side (left side) of the induction heating cooking appliance 600 is shown, it shall actually be comprised by both sides as left-right symmetry.

  At the time of assembly, the duct 13, the fan 14, and the inverter board 15 are arranged in advance on the unit base 59 before being incorporated in the housing 11. Then, an elastic body such as a coil spring (not shown) is inserted into the spring locking portion 58 provided on the unit base 59, and the locking portion (not shown) is inserted into the unit base claw portion (not shown) provided on the unit base 59. ) Is locked and the coil base 12 is held. Thereafter, the duct 13, the fan 14, the inverter board 15, and the coil base 12 disposed on the unit base 59 are incorporated into the housing 10 in unit base units. By doing so, it is possible to make sub-assemblies and to assemble them in parallel, so that the production efficiency can be improved.

  When the top plate constituting the cooking surface is assembled, the coil base 12 is urged in a direction in contact with the back surface of the top plate in order to keep the distance between the top plate and the coil base 12 uniform. Therefore, in the past, the coil base 12 was supported by only the plurality of coil springs 53, but there was a problem that the assemblability was poor, such as the coil spring 53 and the coil base 12 coming off during assembly. However, with the above configuration, the coil base 12 is held by the unit base 59 even when the main body is assembled, so that the assemblability is improved.

  That is, the unit base 59 that supports the inverter board 15 and the coil base 12 are engaged with each other, and an elastic body (here, the coil spring 53) is provided therebetween, so that the coil base 12 is attached to the unit base 59. Since the engagement portion is sometimes engaged with force applied, the coil base 12 is not detached during the assembly, and the assemblability is improved.

  10 casing, 11 induction heating coil, 12 coil base, 13 duct, 14 fan, 14a fan, 14b fan, 15 inverter board, 15a inverter board, 15b inverter board, 16 fin, 16a fin, 17 vent hole, 18 condenser part , 18a Capacitor part, 20 Radiant heater, 30 Control unit, 31 Substrate base, 32 Substrate base lid, 40 Heat pipe, 40a Heat pipe, 41 Heat radiating part, 41a Heat radiating part, 42 Heat receiving part, 45 Vent hole, 45a Vent hole, 50 spout, 51 duct claw part, 52 locking part, 53 coil spring, 54 coil unit, 55 slit part 56 flange part, 57 coil base support part, 58 spring locking part, 58a spring locking part, 58b spring locking Part, 58c Spring locking part 58d Spring locking part, 59 unit base, 70 gap, 100 induction heating cooker, 200 induction heating cooker, 300 induction heating cooker, 300a induction heating cooker, 400 induction heating cooker, 500 induction heating cooker, 600 Induction heating cooker.

Claims (10)

An induction heating coil for heating an object to be heated;
An inverter board having a high-frequency power supply for supplying high-frequency power to the induction heating coil;
A coil base on which the induction heating coil is placed;
A fan for cooling the induction heating coil and the inverter board;
A duct for discharging air blown from the fan toward the lower surface of the induction heating coil;
A housing having a ventilation hole and housing the induction heating coil, the inverter board and the fan inside;
A plurality of coil base support portions for holding the coil base;
And at least one more support part than the number of the coil base support parts,
Selectively using the support,
The inverter board, the fan, and the duct are arranged on the same plane, and the air sucked from the vent hole is passed through the inverter board, the fan, and the induction heating coil in this order. . A coil unit engaged so that the coil base and the duct have an integrated configuration;
The induction heating cooker according to claim 1 , further comprising: a unit base on which the coil unit, the inverter board, and the fan are mounted. A plurality of induction heating coils;
The induction heating cooker according to claim 1 or 2 , wherein the inverter board and the fan are provided for each induction heating coil. The induction heating cooker according to claim 2 or claim 3 dependent on claim 2 , wherein the unit base and the coil base are engaged with each other, and an elastic body is provided therebetween. A plurality of induction heating coils;
A heat pipe that is disposed within the housing and transports heat for cooling the inverter board;
A heat receiving portion for transferring heat of the inverter board to the heat pipe;
Provided at one end of the heat pipe, and a heat radiating part that radiates heat transported from the inverter board,
The induction heating cooker according to any one of claims 1 to 4 , wherein the inverter board and the heat pipe are provided for each induction heating coil. Forming an opening in the case for taking air into the case;
The induction heating cooker according to claim 5 , wherein the heat dissipating part is arranged to be cooled before the induction heating coil. The heat receiving part is arranged at both ends of the heat pipe, the heat radiating part is arranged in the middle of the heat pipe,
Forming an opening in the case for taking air into the case;
The induction heating cooker according to claim 6 , wherein the heat dissipating part is disposed in the vicinity of the opening. A fan for taking in air for cooling the induction heating coil and the inverter board;
A control unit in which the inverter board and the fan are paired is configured in the housing,
The induction heating cooker according to any one of claims 5 to 7 , wherein the control unit is provided for each induction heating coil. The induction according to any one of claims 1 to 8 , wherein one or two or more capacitors constituting the high-frequency power supply unit are arranged inside the housing separately from the inverter board. Cooking cooker. The induction heating cooker according to claim 9 , which is dependent on claim 8 , wherein the capacitor is disposed inside the control unit.

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