Heating cooker

Abstract

To provide a technique that can sufficiently cool an induction heating coil that is arranged on the most downstream side of a first air passage.SOLUTION: A heating cooker disclosed in this specification includes a first air passage having an intake port for taking in air from the outside and an exhaust port for sending air to the outside, multiple induction heating coils arranged inside the first air passage, a fan for generating an air flow inside the first air passage, and a second air passage provided separately from the first air passage. The second air passage merges with the first air passage downstream of one of the multiple induction heating coils and upstream of at least a part of the most downstream of the multiple induction heating coils.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The technology disclosed in this specification relates to a cooking device. [Background technology]

[0002] Patent Document 1 discloses a cooking device that includes a first air passage having an intake port for taking in air from the outside and an exhaust port for sending the air out, multiple induction heating coils arranged inside the first air passage, and a fan that generates an air flow inside the first air passage. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-139969 Summary of the Invention [Problem to be solved by the invention]

[0004] In the cooking device of Patent Document 1, when multiple induction heating coils arranged inside the first air passage are cooled by air blown by a fan, the air supplied to the induction heating coil located at the most downstream side of the first air passage may contain heat discharged by the induction heating coil located upstream. In this case, the induction heating coil located at the most downstream side is supplied with relatively high-temperature air containing the discharged heat, which may prevent the induction heating coil located at the most downstream side from being sufficiently cooled. This specification provides a technology that enables sufficient cooling of the induction heating coil located at the most downstream side of the first air passage. [Means for solving the problem]

[0005] A cooking device according to a first aspect of the present specification may include a first air passage having an intake port for taking in air from the outside and an exhaust port for sending the air to the outside, a plurality of induction heating coils arranged inside the first air passage, a fan for generating an air flow inside the first air passage, and a second air passage provided separately from the first air passage. The second air passage may merge with the first air passage downstream of one of the plurality of induction heating coils and upstream of at least a part of the most downstream of the plurality of induction heating coils.

[0006] According to the above configuration, low-temperature air that does not contain waste heat from the upstream induction heating coils can be supplied to the induction heating coil that is located furthest downstream of the multiple induction heating coils. The amount of air supplied to the induction heating coil located furthest downstream can also be increased. This configuration allows the induction heating coil located furthest downstream of the first air passage to be sufficiently cooled.

[0007] In a second aspect, in the cooking device of the first aspect, the second air passage may branch off from the first air passage upstream of the one of the plurality of induction heating coils.

[0008] According to the above configuration, there is no need to provide an air intake port for taking in air from outside into the second air passage separately from an air intake port for taking in air from outside into the first air passage, thereby simplifying the structure.

[0009] In a third aspect, in the first or second aspect, the fan may be disposed upstream of the plurality of induction heating coils.

[0010] If the fan were located downstream of the induction heating coils, relatively high-temperature air containing the exhaust heat from the induction heating coils would pass through the fan, which could cause the fan to overheat. With the above configuration, low-temperature air not containing the exhaust heat from the induction heating coils passes through the fan, preventing the fan from overheating.

[0011] In a fourth aspect, in the cooking device of any one of the first to third aspects, the second air passage may be located lower than the first air passage.

[0012] According to the above configuration, it is possible to prevent heat emitted by the induction heating coil from being transferred from the first air passage to the second air passage, and thus the temperature of the air supplied to the induction heating coil located furthest downstream can be lowered.

[0013] In a fifth aspect, the cooking device of any one of the first to fourth aspects may further include a heat insulating structure that prevents heat from transferring between the first air passage and the second air passage.

[0014] According to the above configuration, it is possible to more reliably prevent the heat emitted by the induction heating coil from being transferred from the first air passage to the second air passage, and thus the temperature of the air supplied to the induction heating coil located furthest downstream can be lowered.

[0015] In a sixth aspect, in the cooking device of any one of the first to fifth aspects, the plurality of induction heating coils may include only two induction heating coils.

[0016] According to the above configuration, it is possible to more reliably improve the cooling efficiency of the induction heating coil that is disposed on the downstream side of the two induction heating coils. [Brief explanation of the drawings]

[0017] [Figure 1]1 is a view of a cooking device 2 according to an embodiment as viewed from above on the front left. [Figure 2] 1 is an exploded view of a cooking device 2 according to an embodiment, viewed from above on the front right. [Figure 3] FIG. 2 is a diagram of a portion of the cooking device 2 according to the embodiment in the vicinity of a coil cooling case 142A, cut along a plane perpendicular to the left-right direction, as viewed from the left. [Figure 4] FIG. 10 is a diagram of a portion of a cooking device 2 according to a modified example in the vicinity of a coil cooling case 142B, cut along a plane perpendicular to the left-right direction, as viewed from the left. [Figure 5] FIG. 10 is a diagram of a portion of a cooking appliance 2 according to another modified example in the vicinity of a coil cooling case 142C, cut along a plane perpendicular to the left-right direction, as viewed from the left. [Figure 6] FIG. 10 is a view of a portion in the vicinity of a coil cooling case 142D of a cooking appliance 2 according to yet another modified example, cut along a plane perpendicular to the left-right direction, as viewed from the left. [Figure 7] FIG. 10 is a view of a portion in the vicinity of a coil cooling case 142E of a cooking appliance 2 according to yet another modified example, cut along a plane perpendicular to the left-right direction, as viewed from the left. [Figure 8] FIG. 10 is a view of a portion in the vicinity of a coil cooling case 142F of a cooking appliance 2 according to yet another modified example, cut along a plane perpendicular to the left-right direction, as viewed from the left. DETAILED DESCRIPTION OF THE INVENTION

[0018] (Example) The cooking appliance 2 shown in FIG. 1 is, as an example, a built-in type cooking appliance that is incorporated into a system kitchen (not shown). In the following description, the front, back, up, down, left and right directions are defined based on the cooking appliance 2 incorporated into the system kitchen. The up and down direction here specifically refers to the up and down direction along the vertical direction. Furthermore, the front direction is the direction in which a user is positioned as viewed from the cooking appliance 2, and the direction opposite to the front direction is the rear direction. Therefore, it should be noted that the front, back, left and right directions in the following description are different from the front, back, left and right directions as viewed from the user using the cooking appliance 2.

[0019] The cooking device 2 includes a cooking device body 4, a top plate 10, a gas stove 12, a first IH (Induction Heating) stove 14, a second IH stove 16, a stove operation unit 18, a grill chamber 20, and a grill operation unit 22.

[0020] As shown in FIG. 2, the cooker body 4 includes a housing 24, an exposed portion 26, a plurality of through holes 28, and a top plate base 30. The housing 24 is formed in a box shape that is open at the top. The exposed portion 26 is provided at the front of the housing 24. The exposed portion 26 is exposed at the front of a system kitchen (not shown). The plurality of through holes 28 are provided in the housing 24 above the exposed portion 26. The plurality of through holes 28 penetrate the housing 24 in the front-to-rear direction. The plurality of through holes 28 are not exposed at the front of the system kitchen, but communicate with the space in front of the system kitchen through gaps between the system kitchen and the exposed portion 26, etc. The top plate base 30 extends horizontally from the upper edge of the housing 24.

[0021] The top plate 10 is exposed on the worktop (not shown) of the system kitchen. The top plate 10 includes a glass plate 32, a frame 34, and an exhaust port cover 36. The glass plate 32 is made of, for example, crystallized glass. The frame 34 holds the glass plate 32 and the exhaust port cover 36, and is fixed to the top plate base 30 with screws or the like. The top plate 10 can be removed from the cooker body 4 by releasing the fixation between the frame 34 and the top plate base 30.

[0022] The gas stove 12, the first IH stove 14, and the second IH stove 16 are provided on the top plate 10. The gas stove 12 is located on the right side when viewed from the center of the top plate 10. The first IH stove 14 is located on the front left side when viewed from the center of the top plate 10. The second IH stove 16 is located on the rear left side when viewed from the center of the top plate 10.

[0023] The gas stove 12 includes a trivet 38, a burner 40, a temperature sensor 42, a gas supply path 44, and an igniter (not shown). Food to be cooked can be placed on the trivet 38. Fuel gas is supplied to the burner 40 via the gas supply path 44. A solenoid valve (not shown) switches the supply of fuel gas to the burner 40 between permitted and prohibited states. When the igniter is activated while the supply of fuel gas to the burner 40 is permitted, combustion of the fuel gas begins. In other words, the gas stove 12 is ignited. The gas stove 12 can heat food placed on the trivet 38 using combustion gases generated when the fuel gas is burned. The temperature sensor 42 detects the temperature of the food placed on the trivet 38. When the supply of fuel gas to the burner 40 is prohibited, combustion of the fuel gas ends. In other words, the gas stove 12 is extinguished. In this specification, the term "food to be cooked" may refer to cooking utensils such as a pot, or may refer to the food ingredients themselves that are to be cooked.

[0024] The first IH stove 14 includes a first mounting portion 46, a first coil base 48, a first IH coil 50, and a temperature sensor (not shown). The first mounting portion 46 is made of a material that is permeable to a magnetic field (e.g., crystallized glass). In this embodiment, a portion of the glass plate 32 functions as the first mounting portion 46. In the drawings, the portion of the glass plate 32 that functions as the first mounting portion 46 is indicated by a circle. The first coil base 48 holds the first IH coil 50. The first coil base 48 and the first IH coil 50 are positioned directly below the first mounting portion 46. The first IH coil 50 generates a high-frequency magnetic field when a high-frequency current is supplied to it. The first IH stove 14 can induction-heat an object placed on the first mounting portion 46 using this high-frequency magnetic field. The temperature sensor detects the temperature of the object placed on the first mounting portion 46 through the top plate 10.

[0025] The second IH stove 16 includes a second mounting portion 52, a second coil base 54, a second IH coil 56, and a temperature sensor (not shown). The second IH stove 16 is configured in substantially the same manner as the first IH stove 14. Therefore, a description of the second IH stove 16 will be omitted.

[0026] The grill chamber 20 is accommodated in the housing 24. The grill chamber 20 can be opened and closed via a grill door 58 provided in the exposed portion 26. The grill chamber 20 can accommodate food to be cooked. Although not shown, the grill chamber 20 is equipped with a gas burner (also called a grill burner) that heats the food to be cooked accommodated in the grill chamber 20. The grill chamber 20 is equipped with a grill duct 60 for exhausting oily smoke and the like generated within the grill chamber 20. A grill exhaust port 62 is provided at the rear upper part of the grill duct 60. The grill exhaust port 62 opens toward the space above the top plate 10 via the exhaust port cover 36.

[0027] As shown in FIG. 1 , the stove operation unit 18 is provided on the exposed portion 26 to the left of the grill door 58. The stove operation unit 18 includes a power switch 64 for the cooking appliance 2, three heating amount operation units 66a, 66b, and 66c, and a panel operation unit 68. The heating amount operation unit 66a is used to instruct the gas stove 12 to start heating (i.e., ignite) and stop heating (i.e., turn off the flame), and also to adjust the amount of heating of the gas stove 12. The heating amount operation unit 66b is used to instruct the first IH stove 14 to start heating and stop heating, and also to adjust the amount of heating of the first IH stove 14. The heating amount operation unit 66c is used to instruct the second IH stove 16 to start heating and stop heating, and also to adjust the amount of heating of the second IH stove 16. The panel operation unit 68 also includes a display and numerous switches. Various operations (for example, setting operations related to automatic cooking) related to the gas stove 12, the first IH stove 14, and the second IH stove 16 can be performed on the panel operation unit 68. The panel operation unit 68 can be stored inside the cooker body 4 as shown in FIG.

[0028] The grill operation unit 22 shown in FIG. 1 is provided on the right side of the grill door 58 in the exposed portion 26. The grill operation unit 22 includes a heat amount operation unit 70 and a panel operation unit 72. The heat amount operation unit 70 is used to issue commands to start (i.e., ignite) and stop (i.e., extinguish) heating of the grill burner (not shown), as well as to adjust the amount of heat of the grill burner. The panel operation unit 72 is equipped with a display and numerous switches. Various operations related to the grill chamber 20 (for example, setting operations related to automatic cooking) can be performed using the panel operation unit 72. The panel operation unit 72, like the panel operation unit 68, can be stored inside the cooker body 4.

[0029] As shown in FIG. 2, the cooking device 2 includes a substrate cooling unit 76 and a coil cooling unit 78.

[0030] (Substrate cooling unit 76) The board cooling unit 76 includes a board cooling case 86 and a board cooling fan (not shown). The board cooling case 86 is housed in the housing 24 and is disposed on the left side of the grill chamber 20. The board cooling case 86 is fixed to the housing 24 with screws or the like. The board cooling case 86 can be removed from the housing 24 by releasing the fastening with the screws or the like. This makes the board cooling unit 76 detachable from the cooker body 4.

[0031] The substrate cooling case 86 includes a case body 88 and an exhaust duct 90. The case body 88 includes an upper case member 92 and a lower case member 94. The upper case member 92, the lower case member 94, and the exhaust duct 90 are formed as separate members. In this embodiment, the upper case member 92 and the lower case member 94 are connected to each other by fasteners (not shown). The case body 88 and the exhaust duct 90 are connected to each other by a fitting connection. Note that the case body 88 and the exhaust duct 90 may also be connected to each other by fasteners (not shown).

[0032] The case main body 88 is provided with a board housing chamber (not shown) for housing a power supply board (not shown), a first inverter board (not shown), and a second inverter board (not shown), and a fan housing chamber (not shown) for housing a board cooling fan. The power supply board electrically connects an external power source (not shown) such as a commercial power source to each electrical component of the cooking appliance 2 (e.g., the first inverter board and the second inverter board). The power supply board includes, for example, a transformer circuit and a rectifier circuit. The power supply board can adjust the power supplied from the external power source and supply it to each electrical component of the cooking appliance 2. The first inverter board and the second inverter board include, for example, a switching circuit. The first inverter board and the second inverter board can supply high-frequency current to the first IH coil 50 and the second IH coil 56, respectively. Although not shown, a through-hole is provided in the rear of the case main body 88 to allow passage of wire harnesses connected to each board. However, the gap between the through-hole and the wire harness is sealed with a sealing member (e.g., a sponge) (not shown). The exhaust duct 90 is provided with a rear opening 114 that communicates with the space above the top plate 10 via the exhaust port cover 36.

[0033] The board cooling fan is driven, for example, when the power of the cooking appliance 2 is turned on, and is stopped when the power of the cooking appliance 2 is turned off. When the board cooling fan is driven, air is drawn into the fan housing chamber from the space below the cooking appliance main body 4 (see FIG. 1), and air is sent from the fan housing chamber to the board housing chamber. The air that has passed through the interior of the board housing chamber is discharged to the outside of the case main body 88 through the rear opening 114.

[0034] In this way, when the board cooling fan is driven, an air flow is generated in the internal space of board cooling case 86. Board cooling unit 76 uses this air flow to discharge heat generated in the power supply board, first inverter board, and second inverter board to the outside, thereby cooling the power supply board, first inverter board, and second inverter board.

[0035] (Coil cooling unit 78) The coil cooling unit 78 includes a coil cooling case 142A and a coil cooling fan 144 (see FIG. 3). The coil cooling case 142A supports the first IH coil 50 and the second IH coil 56 via the first coil base 48 and the second coil base 54.

[0036] The coil cooling case 142A is accommodated in the housing 24 and is disposed above the substrate cooling unit 76 and directly below the top plate 10. The coil cooling case 142A is fixed to the housing 24 with screws or the like. The coil cooling case 142A can be removed from the housing 24 by releasing the fastening with the screws or the like. This makes the coil cooling case 142A detachable from the cooker body 4. The coil cooling unit 78 may also be fixed to the top plate 10.

[0037] As shown in FIG. 3, the coil cooling case 142A includes a case main body 146, a case first air intake port 150, a case second air intake port 152, a case exhaust port 154, a first air passage 160, and a second air passage 162. The coil cooling fan 144 is disposed in a fan accommodating chamber 148 provided in the housing 24 in front of the case main body 146. The front portion of the fan accommodating chamber 148 communicates with the space in front of the cooker main body 4 via a plurality of through-holes 28 in the housing 24. The case first air intake port 150 and the case second air intake port 152 are disposed in the front portion of the coil cooling case 142A. The case first air intake port 150 and the case second air intake port 152 open forward and communicate with the rear portion of the fan accommodating chamber 148. The first air passage 160 is a space defined by the top panel 10, a first side wall 146a (see FIG. 2) of the case body 146, and a first bottom wall 146b of the case body 146. The first IH coil 50 and the second IH coil 56 are both disposed within the first air passage 160. The first air passage 160 is connected to the fan housing chamber 148 via the case first air intake port 150. The second air passage 162 is disposed below the first air passage 160. The second air passage 162 is a space defined by the first bottom wall 146b, a second side wall 146c (see FIG. 2), and a second bottom wall 146d of the case body 146. The second air passage 162 is connected to the fan housing chamber 148 via the case second air intake port 152. The rear end of the second air passage 162 is connected to the first air passage 160 at a position rearward of the rear end of the first IH coil 50 and forward of the center of the second IH coil 56. A heat insulating material 147 such as glass wool is attached to the first bottom wall 146b between the first air passage 160 and the second air passage 162 as a heat insulating structure that suppresses heat transfer between the first air passage 160 and the second air passage 162. The case exhaust port 154 is located at the rear end of the first air passage 160. The case exhaust port 154 opens upward. The case exhaust port 154 is connected to the space above the top plate 10 via the exhaust port cover 36.

[0038] The first side wall 146a of the case body 146 (see FIG. 2) may be provided with a notch (not shown) for passing a wire harness (not shown). However, the gap between the notch and the wire harness is sealed with a sealing member (e.g., sponge) (not shown). The gap between the upper end of the first side wall 146a of the case body 146 and the top plate 10 is sealed with a sealing member (e.g., packing) (not shown).

[0039] The coil cooling fan 144 is driven, for example, when heating is initiated on at least one of the first IH stove 14 and the second IH stove 16. The coil cooling fan 144 stops when heating is completed on both the first IH stove 14 and the second IH stove 16. When the coil cooling fan 144 is driven, air is drawn from the space in front of the cooker body 4 through the multiple through-holes 28 into the fan housing chamber 148. The air is then discharged rearward from the fan housing chamber 148. The air discharged from the fan housing chamber 148 branches into a first air passage 160 and a second air passage 162 via a first case air intake 150 and a second case air intake 152. The air flowing from the first case air intake 150 into the first air passage 160 passes through the first IH coil 50 and the second IH coil 56, thereby cooling them. The air that flows into the second air passage 162 from the case second air intake port 152 bypasses the first IH coil 50, merges with the first air passage 160 behind the first IH coil 50, and passes through the second IH coil 56, thereby cooling the second IH coil 56. The air that has passed through the second IH coil 56 in the first air passage 160 is then discharged to the outside of the case body 146 via the case exhaust port 154.

[0040] In this manner, when the coil cooling fan 144 is driven, an air flow is generated in the internal space of the coil cooling case 142A. The coil cooling unit 78 uses this air flow to discharge heat generated in the first IH coil 50 and the second IH coil 56 to the outside, thereby cooling the first IH coil 50 and the second IH coil 56. In this embodiment, the air flow generated in the internal space of the coil cooling case 142A when the coil cooling fan 144 is driven is also referred to as "coil cooling air B1." In FIG. 3, the coil cooling air B1 is schematically illustrated using arrows. In this embodiment, the upstream and downstream sides of the flow direction of the coil cooling air B1 may be simply referred to as the "upstream side" and the "downstream side," respectively.

[0041] In this embodiment, a second air passage 162, separate from the first air passage 160, is connected to the first air passage 160 downstream of the first IH coil 50 and upstream of at least a portion of the second IH coil 56. This allows relatively cool air that does not contain heat emitted by the first IH coil 50 to pass through the second IH coil 56. This improves the cooling efficiency for the second IH coil 56, which is located downstream of the first IH coil 50. Furthermore, by placing the second IH coil 56 at the point where the first air passage 160 and the second air passage 162 converge, the amount of air passing through the second IH coil 56 can be increased, thereby more reliably improving the cooling efficiency for the second IH coil 56.

[0042] (Variation) The cooking appliance 2 may be a freestanding cooking appliance that is used without being incorporated into a system kitchen.

[0043] Cooking appliance 2 may include an IH stove instead of gas stove 12. Alternatively, cooking appliance 2 may include two gas stoves instead of first IH stove 14 and second IH stove 16.

[0044] The cooking device 2 does not necessarily have to include the grill compartment 20. Alternatively, the cooking device 2 may include another heating compartment (for example, an oven compartment or a microwave compartment) instead of the grill compartment 20.

[0045] The cooking appliance 2 may include a cooling unit for cooling electrical components (for example, an LED board, not shown) other than the power supply board (not shown), the first inverter board (not shown), the second inverter board (not shown), the first IH coil 50, and the second IH coil 56. The cooling unit may have a configuration substantially similar to that of the coil cooling unit 78 (or the board cooling unit 76).

[0046] Coil cooling unit 78 may not be detachable from cooker body 4. For example, coil cooling case 142A may be integrated into housing 24.

[0047] The coil cooling fan 144 does not have to be attached to the front side of the coil cooling case 142A. For example, it may be installed between the first IH coil 50 and the second IH coil 56 inside the first air passage 160, or it may be installed behind the second IH coil 56 and immediately before the case exhaust port 154.

[0048] A plurality of coil cooling fans 144 may be attached to the coil cooling case 142A. For example, they may be arranged on the upstream side of each of the first air passage 160 and the second air passage 162.

[0049] 4, the coil cooling unit 78 may have an air insulation structure 247 provided between the first air passage 160 and the second air passage 162, instead of the insulation material 147 provided between the first air passage 160 and the second air passage 162. In the air insulation structure 247, air present in an internal space 247s provided between the first bottom wall 146b below the first air passage 160 and the second top wall 146e above the second air passage 162 suppresses heat transfer between the first air passage 160 and the second air passage 162.

[0050] The coil cooling unit 78 may be configured such that the rear end of the second air passage 162 is connected to the first air passage 160 at a position rearward of the rear end of the first IH coil 50 and forward of the front end of the second IH coil 56, as in the coil cooling case 142C shown in Figure 5.

[0051] The coil cooling unit 78 may be configured such that the rear end of the second air passage 162 is connected to the first air passage 160 at a position rearward of the center of the second IH coil 56 and forward of the rear end of the second IH coil 56, as in the coil cooling case 142D shown in Figure 6.

[0052] 7, the coil cooling unit 78 does not have to have the second air passage 162 communicate with the space in front of the cooker body 4 via the multiple through-holes 28 of the housing 24. In this case, the second air passage 162 may communicate with the lower side, rear side, or left side of the cooker body 4. Furthermore, in the case of the above configuration, the coil cooling fan 144 may be provided in a position before the case exhaust port 154.

[0053] The second air passage 162 of the coil cooling unit 78 does not necessarily have to include the case second air intake port 152. Furthermore, the coil cooling unit 78 may have two or more IH coils, including the first IH coil 50 and the second IH coil 56. In this case, the coil cooling unit 78 may include, in order from the upstream side, a third IH coil 256, the first IH coil 50, and the second IH coil 56, as in the coil cooling case 142F shown in FIG. 8 . The third IH coil 256 may be supported by a third coil base 254. The second air passage 162 may branch off from the first air passage 160 at a position just before the first IH coil 50, which is the second IH coil from the upstream side of the three IH coils arranged inside the first air passage 160, and may take in air from inside the first air passage 160 through the branch port 252. The rear end of the second air passage 162 may be connected to a position inside the first air passage 160 that is rearward of the rear end of the first IH coil 50 and forward of the front end of the second IH coil 56. In the above configuration, the coil cooling fan 144 may be provided in front of the case exhaust port 154. Alternatively, the coil cooling fan 144 may be provided near the upstream end of the first air passage 160.

[0054] (Correspondence) As described above, in one or more embodiments, the cooking appliance 2 includes a first air passage 160 having a case first air inlet 150 (an example of an air inlet) that takes in air from the outside and a case exhaust port 154 (an example of an exhaust port) that sends the air out to the outside, a first IH coil 50 and a second IH coil 56 (an example of multiple induction heating coils) that are arranged inside the first air passage 160, a coil cooling fan 144 (an example of a fan) that generates an air flow inside the first air passage 160, and a second air passage 162 that is provided separately from the first air passage 160. The second air passage 162 merges with the first air passage 160 downstream of the first IH coil 50 (an example of one of the multiple induction heating coils) and upstream of at least a portion of the second IH coil 56 (an example of the most downstream of the multiple induction heating coils).

[0055] With the above configuration, it is possible to supply low-temperature air that does not contain waste heat from the upstream first IH coil 50 to the second IH coil 56, which is located furthest downstream of the first IH coil 50 and the second IH coil 56. It is also possible to increase the amount of air supplied to the second IH coil 56, which is located furthest downstream. With this configuration, it is possible to sufficiently cool the second IH coil 56, which is located furthest downstream of the first air passage 160.

[0056] In one or more embodiments, the second air passage 162 branches off from the first air passage 160 upstream of the first IH coil 50 (see FIG. 8).

[0057] According to the above configuration, there is no need to provide the case second air intake 152 for taking in air from outside into the second air passage 162 separately from the case first air intake 150 for taking in air from outside into the first air passage 160, thereby simplifying the structure.

[0058] In one or more embodiments, the coil cooling fan 144 is positioned upstream of the first IH coil 50 and the second IH coil 56 (see FIGS. 3-6).

[0059] 7 and 8, if the coil cooling fan 144 is located downstream of the first IH coil 50 and the second IH coil 56, relatively high-temperature air containing the exhaust heat from the first IH coil 50 and the second IH coil 56 passes through the coil cooling fan 144, which may cause the coil cooling fan 144 to overheat. With the above configuration, low-temperature air that does not contain the exhaust heat from the first IH coil 50 and the second IH coil 56 passes through the coil cooling fan 144, which prevents the coil cooling fan 144 from overheating.

[0060] In one or more embodiments, the second air passage 162 is located below the first air passage 160 .

[0061] The above configuration can prevent heat emitted by the first IH coil 50 from being transferred from the first air passage 160 to the second air passage 162. This configuration can lower the temperature of the air supplied to the second IH coil 56.

[0062] In one or more embodiments, the cooking appliance 2 further includes an insulating material 147 (see Figures 3, 5, 6, and 8) that prevents heat from transferring between the first air passage 160 and the second air passage 162, and an air insulating structure 247 (see Figure 4) (an example of an insulating structure).

[0063] The above configuration more reliably prevents the heat emitted by the first IH coil 50 from being transferred from the first air passage 160 to the second air passage 162. This configuration allows the air supplied to the second IH coil 56 to be at a lower temperature.

[0064] In one or more embodiments, the cooking appliance 2 includes only two induction heating coils: a first IH coil 50 and a second IH coil 56.

[0065] According to the above configuration, the cooling efficiency of the second IH coil 56 disposed downstream can be more reliably improved.

[0066] The technical elements described in this specification or drawings exhibit technical utility either alone or in various combinations, and are not limited to the combinations set forth in the claims at the time of filing. Furthermore, the technologies illustrated in this specification or drawings can achieve multiple objectives simultaneously, and achieving one of those objectives is itself technically useful. [Explanation of symbols]

[0067] 2:Heating cooker 4: Cooking appliance body 10: Top plate 12: Gas stove 14: 1st IH stove 16: Second IH stove 18: Stovetop control panel 20: Grill compartment 22: Grill control panel 24: Housing 26:Exposed part 28: Multiple through holes 30: Top board base 32: Glass plate 34: Frame 36: Exhaust vent cover 38: Trivet 40: Stovetop Burner 42: Temperature sensor 44: Gas supply line 46: First placement section 48: First coil base 50: 1st IH coil 52: Second placement section 54: Second coil base 56: Second IH coil 58: Grill door 60: Grill duct 62: Grill exhaust vent 64: Power switch 66a, 66b, 66c: Heating amount operation section 68: Panel operation section 70: Heating amount operation section 72: Panel operation section 76: Substrate cooling unit 78: Coil cooling unit 86: PCB cooling case 88: Case body 90: Exhaust duct 92: Upper case member 94: Lower case member 114: Rear opening 142A, 142B, 142C, 142D, 142E, 142F: Coil cooling case 144: Coil cooling fan 146: Case body 146a: 1st side wall 146b: 1st bottom wall 146c: 2nd side wall 146d: 2nd bottom wall 146e: 2nd top wall 147: Insulation material 148: Fan Containment Room 150: Case No. 1 intake 152: Case No. 2 intake 154: Case exhaust port 160: First air passage 162: Second air passage 247: Air insulation structure 247s :Interior space 252: Branch entrance 254: Third coil base 256: 3rd IH coil

Claims

1. a first air passage having an intake port for taking in air from the outside and an exhaust port for sending the air to the outside; a plurality of induction heating coils disposed within the first air passage; a fan that generates an air flow inside the first air passage; a second air passage provided separately from the first air passage; A cooking device comprising: the second air passage joins the first air passage downstream of one of the plurality of induction heating coils and upstream of at least a part of the most downstream of the plurality of induction heating coils.

2. The cooking device according to claim 1 , wherein the second air passage branches off from the first air passage upstream of the one of the plurality of induction heating coils.

3. The cooking device according to claim 1 , wherein the fan is disposed upstream of the plurality of induction heating coils.

4. The cooking device according to claim 1 , wherein the second air passage is located below the first air passage.

5. The cooking device according to claim 1 , further comprising a heat insulating structure that prevents heat from transferring between the first air passage and the second air passage.

6. The cooking device according to claim 1 , wherein the plurality of induction heating coils include only two induction heating coils.

Images