JP2020064735A - Heating cooker - Google Patents

Abstract

To provide a heating cooker capable of increasing cooling efficiency of a heating coil and a heat sink.SOLUTION: A heating cooker comprises: a top plate; a heating coil installed below the top plate; a first fan; a first fan case housing the first fan and having a suction port and a discharge port formed; a second fan installed behind the first fan; a second fan case that houses the second fan and that has a suction port and a discharge port formed and that is installed so as to overlap at least partly with the first fan case in the width direction in a front view; a first air introducing member that forms a first air introducing passage having an inlet connected with the discharge port of the first fan case and a first outlet; a drive element included in an inverter circuit for supplying high-frequency current to the heating coil; and a heat sink attached to the drive element and arranged in the first air introducing passage.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a heating cooker including a heating coil and a heat sink that radiates heat from a drive element of an inverter circuit that supplies a high frequency current to the heating coil.

  A heating cooker provided with a heating coil is provided with a structure for cooling built-in components. As such a heating cooker, there has been proposed one provided with a fan device for cooling the heating coil and a fan device for cooling the heat sink of the high heat generating element (for example, refer to Patent Document 1). In the heating cooker described in Patent Document 1, the fan device and the heating coil are arranged so as to overlap in the vertical direction, and the other fan device and the heat sink are arranged so as to overlap in the vertical direction.

JP, 2013-26169, A

  In the heating cooker described in Patent Document 1, the heating coil and the heat sink are cooled by using fan devices provided respectively. However, as disclosed in FIG. 4 of Patent Document 1, the cooling air sent from the fan device toward the heat sink flows not only toward the rear of the main body in which the exhaust port is formed but also toward the front. . If there is such a flow of cooling air from the rear to the front, the temperature of the air that has become hot after cooling the object to be cooled is not smoothly exhausted from the exhaust port, so that the cooling efficiency of the heating coil and the heat sink decreases.

  The present invention has been made in view of the above problems, and provides a heating cooker capable of enhancing the cooling efficiency of a heating coil and a heat sink.

  A heating cooker according to the present invention accommodates a top plate, a heating coil provided under the top plate, a first fan, and the first fan, and has a first inlet and an outlet. A fan case, a second fan provided behind the first fan, and the second fan are formed, and an inlet and an outlet are formed, and at least in the width direction with the first fan case in a front view. A second fan case provided so as to partially overlap with each other, an inlet connected to the air outlet of the first fan case, and a first air guide member having a first air passage having a first outlet. A drive element included in an inverter circuit that supplies a high-frequency current to the heating coil, and a heat sink attached to the drive element and disposed in the first air guide passage.

  According to the present invention, the first fan and the second fan are arranged side by side in the front-rear direction, and the first fan case that houses the first fan and the second fan case that houses the second fan have a width in a front view. It is arranged so that at least a part thereof overlaps in the direction. By thus arranging the first fan and the second fan arranged side by side in the front-rear direction such that the first fan case and the second fan case overlap each other in the width direction, the first fan and the second fan are arranged in the width direction. The two fans will be placed close to each other. The heating cooker is generally installed or installed on a kitchen table, and in this installed state, there is a closed space behind the heating cooker and an open space in front. In such an installed state, the first fan, which is arranged in the front of the open space, can suck in air at a temperature lower than that of the second fan. A heat sink is arranged in the air guide path connected to the air outlet of the first fan case of the first fan that sucks in the air of relatively low temperature. Since the heat sink and the heating coil have a lower temperature, the heat sink can be efficiently cooled by using the air of a relatively low temperature sucked from the first fan. Further, the first air guide member forming the air guide path having the inlet connected to the outlet of the first fan is provided, and since the heat sink is arranged in the air guide path, the second fan delivers the heat. The removed air does not easily contact the heat sink. Therefore, it is possible to prevent the cooling efficiency of the heat sink from being lowered by the cooling air that has been sent from the second fan and has cooled the other components to a high temperature.

It is a perspective view of kitchen furniture 200 in which heating cooker 100 according to Embodiment 1 is installed. FIG. 3 is a perspective view of the heating cooker 100 according to the first embodiment with the top plate 1 and the exhaust port cover 5 removed. It is a perspective view from the lower side of heating cooker 100 concerning Embodiment 1. It is a figure explaining the internal structure of the heating cooker 100 which concerns on Embodiment 1. It is a perspective view explaining the internal structure of the heating cooker 100 which concerns on Embodiment 1. It is a figure explaining the structure of the air guide member 40 which concerns on Embodiment 1. It is a figure explaining the flow of the cooling wind of the heating cooker 100 which concerns on Embodiment 1. FIG. 3 is a vertical cross-sectional view in the front-rear direction of the heating cooker 100 according to Embodiment 1, which passes through a first fan case 20 and a second fan case 30. FIG. 5 is a longitudinal cross-sectional view of the heating cooker 100 according to Embodiment 1 in the front-rear direction passing through the second outlet 54. FIG. 4 is a longitudinal cross-sectional view in the front-rear direction of the heating cooker 100 according to the first embodiment that passes through the first outlet 43 of the first air guide passage 41. FIG. 7 is a perspective view of the heating cooker 100 according to the second embodiment with the top plate 1 removed. It is a partial perspective view centering on 40 A of air guide members, 1st heating coil 9A, and 2nd heating coil 9B which concern on Embodiment 2. It is a perspective view centering around baffle member 40 concerning Embodiment 2. FIG. 6 is a perspective view showing a part of an air guide member 40 according to Embodiment 2 as seen through. It is a cross-sectional view of the heating cooker 100 which concerns on Embodiment 2 which passes along the 3rd air guide path 61A. It is a cross-sectional view of the heating cooker 100 which concerns on Embodiment 2 which passes along 41 A of 1st air guide paths. It is a perspective view of kitchen furniture 200 in which heating cooker 100 concerning Embodiment 3 was installed. It is a perspective view explaining the internal structure of the heating cooker 100 which concerns on Embodiment 3. It is a lower side perspective view explaining an internal structure of heating cooker 100 concerning Embodiment 3. It is a front side perspective view explaining an internal structure of heating cooker 100 concerning Embodiment 3. It is a disassembled perspective view of the heating cooker 100 which concerns on Embodiment 3. It is a figure explaining the structure which supplies cooling air to the lower side of the drive substrate 11 of the heating cooker 100 which concerns on Embodiment 3. It is a cross-sectional view which passes along the 1st fan 21 and the 2nd fan 31 of the heating cooker 100 which concerns on Embodiment 3. FIG. 9 is a plan view of a first front cover 93 and a first intake duct 86 according to the third embodiment. FIG. 25 is a sectional view taken along line AA of FIG. 24. It is a BB sectional view of FIG. FIG. 11 is a perspective view of a cooking chamber 81 and its peripheral components according to the third embodiment. FIG. 9 is a perspective view of an air guide duct 88 and its peripheral components according to the third embodiment. It is a longitudinal cross-sectional view of the heating cooker 100 according to the third embodiment that passes through a third fan case 90. It is a longitudinal cross-sectional view which passes along the 1st heating apparatus 821 and the 2nd heating apparatus 822 of the heating cooker 100 which concerns on Embodiment 3. FIG. 10 is a vertical cross-sectional view of the heating cooker 100 according to the third embodiment at a position passing through the second ventilation port 107 and the third ventilation port 108 and at a position on the left outer side of the width of the cooking chamber 81.

  Hereinafter, an embodiment in which the heating cooker according to the present invention is applied to a built-in induction heating cooker will be described with reference to the drawings. The present invention is not limited to the following embodiments and can be variously modified without departing from the gist of the present invention. Further, the present invention includes all combinations of configurations that can be combined among the configurations shown in the following respective embodiments. Further, the heating cooker shown in the drawings shows an example of equipment to which the heating cooker of the present invention is applied, and the equipment to which the present invention is applied is not limited by the heating cooker shown in the drawings. . Further, in the following description, in order to facilitate understanding, terms indicating directions (for example, “up”, “down”, “right”, “left”, “front”, “rear”, etc.) are used as appropriate. These are for illustration purposes only and do not limit the invention. Further, in the following description, the terms “upstream side” and “downstream side” refer to the upstream side and the downstream side in the flow of cooling air. Further, in each of the drawings, the same reference numerals are the same or equivalent to each other, and this is common to all the texts in the specification. In each drawing, the relative dimensional relationship or shape of each component may differ from the actual one.

Embodiment 1.
FIG. 1 is a perspective view of kitchen furniture 200 in which the heating cooker 100 according to the first embodiment is installed. As shown in FIG. 1, the heating cooker 100 is used by being incorporated in the kitchen furniture 200. The kitchen furniture 200 has a flat kitchen top plate 201 used as a work table, and the top plate 1 of the heating cooker 100 is exposed on the kitchen top plate 201. A storage cabinet 202 is provided in the kitchen furniture 200 at a position below the heating cooker 100. In the present specification, the terms “front” of the heating cooker 100 and “front” of the kitchen furniture 200 refer to the surface facing the user of the heating cooker 100 or the kitchen furniture 200, and in the example of FIG. The door side of 202 is the "front".

  The heating cooker 100 of the present embodiment does not include a heating cabinet such as a grill or an oven in the first housing 10 (see FIG. 2), and the first housing 10 is formed on the kitchen top plate 201. The cooker 100 is installed in the kitchen furniture 200 by being inserted into the opened opening. The thickness of the portion of the heating cooker 100 that is inserted into the opening of the kitchen top plate 201 is preferably equal to or less than the thickness 203 of the kitchen top plate 201. Here, the thickness of the portion of the heating cooker 100 that is inserted into the opening of the kitchen top plate 201 means the back surface of the top plate frame 105 (see FIG. 2) provided around the top plate 1 in the present embodiment. And the outer surface of the bottom of the first housing 10 (see FIG. 2). When the thickness of the portion of the heating cooker 100 that is inserted into the opening of the kitchen top plate 201 is larger than the thickness 203 of the kitchen top plate 201, the height of the storage case 202 is limited and the storage amount of the storage case 202 is increased. Is reduced. Moreover, there is a possibility that the stored items in the storage 202 and the heating cooker 100 may come into contact with each other. In addition, according to the industry standard of kitchen furniture, the thickness of the front end of the kitchen top plate 201 is 40 mm. Therefore, the thickness of the portion of the heating cooker 100 that is inserted into the opening of the kitchen top plate 201 is preferably 40 mm or less. By doing so, the storage amount of the storage case 202 can be secured, and the contact between the stored items of the storage case 202 and the heating cooker 100 can be suppressed.

  The heating cooker 100 has a first housing 10 (see FIG. 2), and the top plate 1 on which a cooking container, which is an object to be heated, is placed is provided on the first housing 10. . In this embodiment, the top plate 1 is provided with two heating ports 2. The number of heating ports 2 is not limited, and one heating port 2 or three or more heating ports 2 may be provided.

  On the rear side of the heating cooker 100, an exhaust port cover 5 is provided to cover the case exhaust port 4 (see FIG. 2) through which exhaust gas from the first case 10 flows. The exhaust port cover 5 is provided with an opening that allows ventilation. The opening provided in the exhaust port cover 5 can be, for example, a slit-shaped opening having a width that is the same as or slightly smaller than the width of the exhaust port cover 5.

  FIG. 2 is a perspective view of the heating cooker 100 according to the first embodiment with the top plate 1 and the exhaust port cover 5 removed. The same number of heating coils as the heating ports 2 are provided in the first housing 10. In the present embodiment, the first heating coil 9A and the second heating coil 9B are provided. The first heating coil 9A and the second heating coil 9B have the same basic structure and function, and are arranged side by side in the first housing 10. The size and shape of the first heating coil 9A and the second heating coil 9B and the number of windings of the conductive wire may be different from each other.

  An operation unit 6 that receives an operation input from a user is provided on the front side of the heating cooker 100. The operation unit 6 can be configured by, for example, a push button, a dial switch, a capacitance type touch switch, or the like, but in the present embodiment, it is a capacitance type touch switch. When the user touches the top plate 1 (see FIG. 1), the touch switch of the operation unit 6 detects a change in electrostatic capacitance and accepts it as an operation input. A display unit 7 is provided on the front side of the top plate 1. The display unit 7 has a device for visually notifying information such as a liquid crystal display and an LED, and is used for the operating state of the heating power of the heating cooker 100, the time of a timer, etc., and the user's input through the operation unit 6. Notification of options, warnings to users, and alerts. The display content of the display unit 7 is visually recognized by the user through the top plate 1 (see FIG. 1).

  The first housing 10 has a bottom plate 101. Further, the first housing 10 has a front plate 102, a rear plate 103 (see FIG. 2), and a pair of left and right side plates 104 as side walls on four sides, and these form a rectangular box shape in a plan view. is doing.

  Inside the first housing 10, a first fan case 20 and a second fan case 30 are provided at positions closer to the first heating coil 9A than the second heating coil 9B in the left-right direction. The first fan case 20 and the second fan case 30 are provided below the first heating coil 9A. When viewed from the front, the left and right positions of the first fan case 20 and the second fan case 30 are determined such that the first fan case 20 and the second fan case 30 overlap in the left-right width direction ( (See FIG. 7). Although details will be described later, an air guide member 40 is connected to the first fan case 20 and the second fan case 30.

  A power supply control board 14 is provided on the bottom plate 101 of the first housing 10 and below the second heating coil 9B. The power supply control board 14 is a board on which a circuit for supplying power to the electric components of the heating cooker 100 including the drive board 11 (see FIG. 4) is mounted. The power supply control board 14 is connected to the operation unit 6 and the display unit 7, and controls the circuits mounted on the display unit 7 and the drive board 11 (see FIG. 4) based on the input from the operation unit 6.

  The first housing 10 has a top plate frame 105 projecting outwardly at the upper end thereof. The top frame 105 located on the rear side of the first housing 10 is provided with a housing exhaust port 4 that communicates with the inside of the first housing 10. In the present embodiment, the same number of housing exhaust ports 4 as the heating ports 2, that is, two are provided, but the number is not limited. The housing exhaust port 4 of the present embodiment is formed of one rectangular hole that is long in the left-right direction, but the number and shape of the holes that form the housing exhaust port 4 are not limited to those shown in the drawings. The air in the first housing 10 that has flowed out of the housing exhaust port 4 is exhausted through an opening provided in the exhaust port cover 5 (see FIG. 1). The widths of the openings provided in the housing exhaust port 4 and the exhaust port cover 5 (see FIG. 1) are preferably nearly equal. More preferably, the width of the opening provided in the exhaust port cover 5 (see FIG. 1) is preferably larger than the width of the housing exhaust port 4. By doing so, the pressure loss of the exhaust gas from the housing exhaust port 4 to the opening of the exhaust port cover 5 is reduced.

  FIG. 3 is a perspective view from the lower side of the heating cooker 100 according to the first embodiment. The bottom plate 101 is provided with a housing intake port 3 on the same side as the first fan case 20 and the second fan case 30 in the left-right direction of the bottom plate 101. In the present embodiment, the case air intake ports 3 are provided in the same number as the total number of the first fan cases 20 and the second fan cases 30, that is, two. The housing intake port 3 of the present embodiment is composed of a plurality of holes formed in the bottom plate 101, but the number and shape of the holes forming the housing intake port 3 are not limited to those shown in the drawings.

  A drain port 8 is formed on the bottom surface on the rear side of the first housing 10. The drainage port 8 is an opening for discharging the liquid such as spilled liquid that has entered the first housing 10 from the first housing 10. Although the drainage ports 8 of the present embodiment are provided at each of the left and right ends of the first housing 10, the number and position of the drainage ports 8 are not limited to those shown in the figure.

  FIG. 4 is a diagram illustrating an internal structure of heating cooker 100 according to the first embodiment. FIG. 4 shows a rear side perspective view in which the operation unit 6, the display unit 7, the first heating coil 9A and the second heating coil 9B are removed from FIG. A first coil baffle plate 71 is provided on the rear side of the second fan case 30. The first coil baffle plate 71 is composed of an arc-shaped plate member and stands upright on the bottom plate 101 such that its surface is orthogonal to the bottom plate 101. The first coil baffle plate 71 is arranged along the outer shape of the first heating coil 9A (see FIG. 2). The second portion 322, which is a part of the air outlet of the second fan case 30, is not connected to the second air guide passage 51 and is opened in a region surrounded by the arc of the first coil air guide plate 71. ing. From the second portion 322 of the air outlet of the second fan case 30, the cooling air is blown to the area surrounded by the first coil air guide plate 71, and the cooling air is placed on the first coil air guide plate 71. Cooling air is sent to the bottom surface of the heating coil 9A. By providing the first coil baffle plate 71, the diffusion of the cooling air into the first housing 10 is suppressed, so that the cooling air from the second fan case 30 can be efficiently sent to the first heating coil 9A. You can

  The air guide member 40 forms a space that houses at least a part of the drive substrate 11 between the air guide member 40 and the bottom plate 101. Cooling air from the first fan case 20 and the second fan case 30 is blown into the air guide member 40. The air guide member 40 is provided with two first outlets 43 and first outlets 53. The upper wall 44 of the air guide member 40 is provided with second outlets 54 and 64. These outlets will be described later.

  FIG. 5 is a perspective view illustrating an internal structure of heating cooker 100 according to the first embodiment. FIG. 5 is a front side perspective view in which the first fan case 20, the second fan case 30, and the air guide member 40 are removed from FIG. 4. The housing intake port 3 is formed below the first fan case 20 and the second fan case 30 (see FIG. 4).

  The drive element 12 is mounted on the drive substrate 11. The drive element 12 is an element that generates a large amount of heat, such as a switching element, which is included in an inverter circuit that supplies a high frequency current to the first heating coil 9A and the second heating coil 9B. The drive element 12 includes, for example, an IGBT and a diode bridge. The drive element 12 is thermally connected to the heat sink 13. In the present embodiment, the plurality of drive elements 12 are arranged along the left-right direction of the first housing 10. The heat sink 13 is composed of a plurality of horizontally oriented flat metal plates which are vertically arranged with a gap therebetween. The gap between the metal flat plates of the heat sink 13 penetrates left and right and serves as an air passage for cooling air.

  FIG. 6 is a diagram illustrating the structure of the air guide member 40 according to the first embodiment. In FIG. 6, the baffle member 40 is shown in a see-through manner. On the lower side of the air guide member 40, three air guide passages, that is, a first air guide passage 41, a second air guide passage 51, and a third air guide passage 61 are formed. A first partition plate 45 extending vertically along the left-right direction partitions the lower space of the upper wall 44 into a first air guide passage 41 and a second air guide passage 51. In addition, a second partition plate 46 that extends vertically in an arc shape in a plan view partitions the space below the upper wall 44 into a second air guide passage 51 and a third air guide passage 61.

  The first air guide passage 41 has an inlet 42 and a first outlet 43. The heat sink 13 (see FIG. 5) and the drive element 12 (see FIG. 5) thermally connected to the heat sink 13 are housed in the first air guide passage 41. The first air guide passage 41 is an air passage for supplying cooling air to the heat sink 13. The first outlet 43 is provided with a first outlet baffle 48 having an inclined surface that rises from the front to the rear. The cooling air flowing out of the first outlet 43 is guided to the upper surface of the rising first outlet baffle plate 48 and flows upward.

  The second air guide passage 51 has an inlet 52, a first outlet 53, and a second outlet 54. The second air guide passage 51 is an air passage for supplying cooling air to the second heating coil 9B and the first heating coil 9A (see FIG. 2). The first outlet 53 of the second air guide passage 51 is located below the front portion of the second heating coil 9B (see FIG. 2). The height of the first outlet 53 is approximately the same as the distance between the lower surface of the upper wall 44 and the upper surface of the bottom plate 101. The second outlet 54 of the second air guide passage 51 is an opening formed in the upper wall 44 of the air guide member 40. The second outlet 54 is located below the first heating coil 9A (see FIG. 2) and faces the lower surface of the first heating coil 9A.

  The third air guide path 61 has an inlet 62, a first outlet 63, and a second outlet 64. The third air guide passage 61 is an air passage for supplying cooling air to the first heating coil 9A (see FIG. 2). The third air guide passage 61 of the present embodiment is formed in a substantially semicircular shape in plan view. The first outlet 63 is open only in the upper part of the vertical range of the third air guide passage 61, and the height dimension of the opening of the first outlet 63 is smaller than the height dimension of the third air guide passage 61. Furthermore, at least a part of the first outlet 63 is open above the upper surface of the second fan case 30 (see FIG. 7). The second outlet 64 is an opening formed in the upper wall 44. The second outlet 64 is located below the first heating coil 9A (see FIG. 2).

  The inlet 42 of the first air guide 41 and the inlet 62 of the third air guide 61 are connected to the first fan case 20 (see FIG. 4). Further, the inlet 52 of the second air guide passage 51 is connected to the second fan case 30 (see FIG. 4).

  7: is a figure explaining the flow of the cooling wind of the heating cooker 100 which concerns on Embodiment 1. FIG. In FIG. 7, the cooling air flowing through the air guide member 40 is conceptually indicated by a dashed arrow, and the cooling air flowing out of the air guide member 40 is conceptually indicated by a solid arrow. First, the structure of the first fan case 20 and the second fan case 30 and the structure related to the connection between these and the baffle member 40 will be described. The air outlet 22 of the first fan case 20 has a first portion 221 and a second portion 222. The first portion 221 is a region located on the front side of the air outlet 22 and is connected to the inlet 42 of the first air guide passage 41. The second portion 222 is a region located on the rear side of the air outlet 22 and is connected to the inlet 62 of the third air guide passage 61. The first portion 221 and the second portion 222 are arranged side by side in the horizontal direction. The opening surface of the outlet 22 is inclined with respect to the front-back direction. More specifically, in a plan view, the first portion 221 and the second portion 222 are laterally displaced from each other. The air outlet 32 of the second fan case 30 has a first portion 321 and a second portion 322. The first portion 321 is a region located on the front side of the air outlet 32, and is connected to the inlet 52 of the second air guide passage 51. The second portion 322 is a region located on the rear side of the air outlet 32, is not connected to the air guide member 40, and faces the space between the air guide member 40 and the first coil air guide plate 71. It is open.

  The cooling air sent out from the first portion 221 of the air outlet 22 of the first fan case 20 flows through the first air guide passage 41, comes into contact with the heat sink 13 in the first air guide passage 41, and is transferred by heat transfer. The heat sink 13 is cooled. In the present embodiment, the plurality of heat sinks 13 are arranged in two rows in the front and rear, and the shielding portion 47 is provided in the gap between the front heat sink 13 and the rear heat sink 13, and the gap is closed. It is peeling. Therefore, cooling air does not flow in the gap between the front heat sink 13 and the rear heat sink 13. Even if cooling air flows in the gap between the front heat sink 13 and the rear heat sink 13, the heat sink 13 is not cooled because it does not come into contact with the heat sink 13. Therefore, by providing the shielding portion 47, it does not contribute to the cooling of the heat sink 13. The cooling air volume is suppressed. Further, in the present embodiment, since the shielding part 47 is integrally formed with the air guide member 40, the manufacturing cost is suppressed as compared with the case where these are manufactured as separate parts.

  The cooling air that has flowed through the first air guide passage 41 flows out from the first outlet 43. The first outlet 43 is open rearward, and the first outlet 43 is provided with a first outlet baffle plate 48 (see FIG. 6). Therefore, the cooling air flowing out from the first outlet 43 flows obliquely upward and rearward toward the housing exhaust port 4 arranged rearward. In the process, the cooling air comes into contact with the second heating coil 9B (see FIG. 2) arranged between the first outlet 43 and the housing exhaust port 4 to cool the second heating coil 9B.

  The cooling air discharged from the second portion 222 of the air outlet 22 of the first fan case 20 flows into the third air guide passage 61 from the inlet 62. The cooling air that has flowed into the third air guide passage 61 flows along the arc-shaped second partition plate 46, and is divided into the first outlet 63 and the second outlet 64 and flows out. Since the first outlet 63 is open above the upper surface of the second fan case 30, the cooling air flowing out from the first outlet 63 flows on the upper surface of the second fan case 30. For this reason, it is possible to suppress the temperature rise of the second fan case 30, which is likely to be caused by the heat from the first heating coil 9A (see FIG. 2). Further, the cooling air flowing out from the first outlet 63 contacts the first heating coil 9A (see FIG. 2) arranged above the first outlet 63 to cool the first heating coil 9A. Further, the cooling air flowing out from the second outlet 64 contacts the first heating coil 9A (see FIG. 2) arranged above the second outlet 64, and cools the first heating coil 9A. Since the first outlet 63 and the second outlet 64 are arranged at different positions in the front-rear direction, the region of the first heating coil 9A extending in the front-rear direction is efficiently cooled. The cooling air that has cooled the first heating coil 9A flows toward the housing exhaust port 4 provided at the rear.

  The air outlet 22 of the first fan case 20 is open toward the right rear portion diagonally to the left front portion of the first housing 10 in which the first fan case 20 is arranged. That is, the opening surface of the outlet 22 faces both the right side and the rear side. Therefore, the cooling air sent out from the air outlet 22 is generated between the right side of the air outlet 22 where the heat sink 13 is arranged and the rear of the first housing 10 where the second heating coil 9B (see FIG. 2) is arranged. Easy to be guided by both. Therefore, both the heat sink 13 and the second heating coil 9B (see FIG. 2) can be efficiently cooled.

  The cooling air discharged from the first portion 321 of the air outlet 32 of the second fan case 30 flows into the second air guide passage 51 from the inlet 52. A part of the cooling air that has flowed into the second air guide passage 51 flows out upward from the second outlet 54 formed on the downstream side of the inlet 52. The cooling air flowing out from the second outlet 54 contacts the first heating coil 9A (see FIG. 2) arranged above the second outlet 54 and cools the first heating coil 9A. The rest of the cooling air that has flowed into the second air guide passage 51 goes straight to the right and flows out from the first outlet 53. The cooling air flowing out from the first outlet 53 merges with the cooling air from the first outlet 43 and flows toward the housing exhaust port 4 arranged at the rear. In the process, the cooling air comes into contact with the second heating coil 9B (see FIG. 2) arranged between the first outlet 53 and the housing exhaust port 4 to cool the second heating coil 9B.

  The cooling air discharged from the second portion 322 of the air outlet 32 of the second fan case 30 flows out to the front side of the first coil baffle plate 71. This cooling air contacts the first heating coil 9A (see FIG. 2) arranged on the upper side of the first coil air guide plate 71 to cool the first heating coil 9A.

  In the second air guide passage 51 and the third air guide passage 61, there are no components such as the drive element 12 and the heat sink 13 that become hot. For this reason, the cooling air supplied to the first heating coil 9A and the second heating coil 9B (see FIG. 2) through the second air guide path 51 and the third air guide path 61 is the first air guide path 41. The temperature is lower than the cooling air that has cooled the heat sink 13. Since the low-temperature cooling air is supplied to the first heating coil 9A and the second heating coil 9B, the first heating coil 9A and the second heating coil 9B are efficiently cooled. Therefore, the functional deterioration and damage due to the temperature rise of the first heating coil 9A and the second heating coil 9B are suppressed.

  In the present embodiment, the cooling air delivered from the first fan case 20 and the second fan case 30 passes through the first air guide passage 41, the second air guide passage 51, or the third air guide passage 61. , The first heating coil 9A or the second heating coil 9B. As described above, in the present embodiment, the cooling air from the first fan case 20 and the second fan case 30 is used to cool the first heating coil 9A or the second heating coil 9B without waste, so that the cooling effect is obtained. high.

  FIG. 8 is a longitudinal cross-sectional view in the front-rear direction of the heating cooker 100 according to the first embodiment that passes through the first fan case 20 and the second fan case 30. A first fan 21 is provided in the first fan case 20. A second fan 31 is provided in the second fan case 30. When the first fan 21 rotates, a suction force is generated at the housing intake port 3. The first fan case 20 is close to the front side of the kitchen top plate 201 in the front-rear direction. Here, the upper side and the lower side of the first housing 10 at the rear of the heating cooker 100 are likely to become hot due to the influence of the high-temperature exhaust gas flowing out from the housing exhaust port 4, whereas the front side of the heating cooker 100. Is exposed to room air and is relatively cold. The relatively low temperature air in the room is easily sucked into the first fan 21 through the gap between the kitchen top plate 201 and the storage case 202, but is difficult to be sucked into the second fan 31 located on the rear side. . Further, the relatively high temperature air located behind the heating cooker 100 is easily sucked by the second fan 31 located on the rear side, but is difficult to be sucked by the first fan 21 located on the front side.

  That is, the first fan 21 can suck in air having a temperature lower than that of the second fan 31 and send it out as cooling air. By using the air delivered by the first fan 21 to cool the heat sink 13 of the drive element 12 that is heated to around 100 ° C., the heat sink 13 of the drive element 12 can be efficiently cooled. Further, the second fan 31 sucks in air having a temperature higher than that of the first fan 21 and sends it out as cooling air. The cooling air generated by the second fan 31 is sent out from the second fan case 30, but the cooling air sent out from the second fan case 30 is the first heating coil 9A as described with reference to FIG. Alternatively, it is used for cooling the second heating coil 9B. Since the first heating coil 9A and the second heating coil 9B are heated to about 180 ° C. during driving, the cooling air sent from the second fan 31 is higher than the cooling air from the first fan 21. No, the first heating coil 9A and the second heating coil 9B can be cooled. If it is attempted to cool the heat sink 13 of the drive element 12 with the cooling air from the second fan 31 that draws in relatively high temperature air, the temperature difference between the cooling air from the second fan 31 and the heat sink 13 is small. The cooling efficiency of the heat sink 13 may decrease. However, according to the present embodiment, the heat sink 13 and the first heating coil 9A and the second heating coil 9B are utilized by utilizing the temperature difference of the air sucked by the first fan 21 and the second fan 31 arranged in the front and rear. And can be cooled efficiently.

  Thus, according to the present embodiment, as shown in FIGS. 7 and 8, the first fan 21 and the second fan 31 are arranged side by side in the front-rear direction. Further, the first fan case 20 that houses the first fan 21 and the second fan case 30 that houses the second fan 31 are arranged so that at least a part thereof overlaps in the left-right width direction in a front view. By arranging the first fan 21 and the second fan 31 arranged side by side in the front-rear direction in such a manner that the first fan case 20 and the second fan case 30 overlap in the left-right width direction, the left-right width direction In, the first fan 21 and the second fan 31 are arranged close to each other. The heating cooker 100 is installed or installed in the kitchen furniture 200, and in this installation state, there is a closed space behind the heating cooker 100 and an open space in front. In such an installed state, the first fan 21 arranged in the front near the open space can suck in air of a lower temperature than the second fan 31. The heat sink 13 is arranged in the first air guide passage 41 connected to the air outlet 22 of the first fan case 20 of the first fan 21 that sucks in air of a relatively low temperature. Since the heat sink 13 has a lower temperature between the heat sink 13 and the first heating coil 9A and the second heating coil 9B, the heat sink 13 is efficiently cooled by using the relatively low temperature air sucked from the first fan 21. can do. Further, an air guide member 40 forming a first air guide 41 having an inlet 42 connected to the outlet 22 of the first fan 21 is provided, and the heat sink 13 is arranged in the first air guide 41. Has been done. Therefore, the air sent from the second fan 31 is unlikely to contact the heat sink 13. Therefore, it is possible to prevent the cooling efficiency of the heat sink 13 from being lowered by the cooling air that is sent from the second fan 31 and cools other components to have a high temperature. Further, the heat sink 13, the first fan case 20, and the second fan case 30 are arranged so as not to vertically overlap with each other, and the height dimension of the first housing 10 is suppressed.

  The upper surface of the first fan case 20 is located higher than the upper surface of the second fan case 30. That is, the cooling air sent from the first fan 21 flows at a position higher than the cooling air sent from the second fan 31. Therefore, the upper surface position of the first fan case 20 and the first air guide path 61 opening to the upper side of the upper surface of the second fan case 30, which is one of the outlets of the cooling air from the first fan 21, are provided. The height position is close to that of the outlet 63. By thus reducing the height difference between the first fan 21 and the first outlet 63, the cooling air from the first fan 21 can be guided to the first outlet 63 with little disturbance. Further, since the upper surface of the second fan case 30 is located lower than the upper surface of the first fan case 20, the height of the space above the second fan case 30 is secured, and the cooling air flows in this space. Cheap. Therefore, the cooling efficiency of the first heating coil 9A arranged on the second fan case 30 can be improved.

  FIG. 9 is a longitudinal cross-sectional view of the heating cooker 100 according to the first embodiment in the front-rear direction passing through the second outlet 54. The heat sink 13 is arranged in the first air guide passage 41 located on the front side of the first partition plate 45, and the heat sink 13 is cooled by the cooling air flowing in the first air guide passage 41. A second outlet 54 is provided on the second air guide passage 51 located on the rear side of the first partition plate 45, and a first heating coil 9A is provided above the second outlet 54. The cooling air flowing out from the second outlet 54 contacts the first heating coil 9A from below the first heating coil 9A. Further, the first heating coil 9A is arranged on the space between the first coil baffle plate 71 and the baffle member 40. The first heating coil 9A is cooled by the cooling air flowing into the space between the first coil baffle plate 71 and the baffle member 40.

  FIG. 10 is a longitudinal cross-sectional view in the front-rear direction of the heating cooker 100 according to the first embodiment, which passes through the first outlet 43 of the first air duct 41. The upper surface of the first outlet baffle plate 48 provided at the first outlet 43 rises from the front to the rear. Therefore, the cooling air flowing out from the first outlet 43 flows obliquely upward. Therefore, the directivity of the cooling air toward the second heating coil 9B located above the upper end of the first outlet air guide plate 48 is enhanced, and the cooling air is efficiently supplied to the second heating coil 9B.

  In the present embodiment, an example has been described in which the first air guide path 41, the second air guide path 51, and the third air guide path 61 are configured by the integrally formed air guide member 40. By doing so, the number of parts is reduced and an increase in the manufacturing cost of the heating cooker 100 is suppressed. However, the specific members forming the first air duct 41, the second air duct 51, and the third air duct 61 are not limited to the above examples, and the first air duct 41 and the second air duct are not limited to the above examples. 51 and a part of the third air guide passage 61 may be configured by separate members. That is, you may provide the 1st air guide member, the 2nd air guide member, and the 3rd air guide member which comprise each of the 1st air guide path 41, the 2nd air guide path 51, and the 3rd air guide path 61.

Embodiment 2.
In the present embodiment, an aspect will be described in which an air guide member having a structure different from that of the air guide member 40 of the first embodiment is provided. In the present embodiment, differences from the first embodiment will be mainly described, and the same components as those in the first embodiment are designated by the same reference numerals.

  FIG. 11 is a perspective view of the heating cooker 100 according to the second embodiment with the top plate 1 removed. FIG. 12 is a partial perspective view centering on the air guide member 40A, the first heating coil 9A, and the second heating coil 9B according to the second embodiment. FIG. 13 is a perspective view centering on the air guide member 40 according to the second embodiment. FIG. 14 is a perspective view showing a part of the air guide member 40 according to the second embodiment in a see-through manner. FIG. 15 is a cross-sectional view of the heating cooker 100 according to the second embodiment that passes through the third air guide passage 61A. FIG. 16 is a cross-sectional view of the heating cooker 100 according to the second embodiment, which passes through the first air guide passage 41A.

  The first air guide 41A, the second air guide 51A, and the third air guide 61A formed by the air guide member 40A have the basic functions of the first air guide 41 and the second air guide 41 of the first embodiment. It is the same as the air guide passage 51 and the third air guide passage 61. That is, the first air duct 41 </ b> A guides the cooling air from the first fan case 20 to the heat sink 13. The second air guide passage 51A guides the cooling air from the second fan case 30 to the first heating coil 9A and the second heating coil 9B. The third air guide passage 61A guides the cooling air from the first fan case 20 to the first heating coil 9A.

  As shown in FIG. 13, the air guide member 40A forms an inlet 62A of the third air guide passage 61A and an inlet 42A of the first air guide passage 41A that are vertically arranged. Both the inlet 42A and the inlet 62A are connected to the air outlet 22 of the first fan case 20. The baffle member 40A is provided with a baffle plate 49 which stands upside down on the right side of the inlet 42A and the inlet 62A. The baffle plate 49 partitions a part of the first casing 10 into front and rear parts, and functions as a wall that guides cooling air to the rear side. A second coil baffle plate 72 that stands up and down is provided on the right side of the baffle member 40A. In the second coil baffle plate 72, a wall extending in the front-rear direction and a wall extending leftward from the rear end of the wall form an L shape as a whole in a plan view. The second coil baffle plate 72 has a function of guiding the cooling air flowing out from the baffle member 40 to the second heating coil 9B.

  Next, each of the first air guide 41A, the second air guide 51A, and the third air guide 61A will be described in detail.

  As shown in FIG. 16, the first air guide passage 41A is connected to a lower portion of the air outlet 22 of the first fan case 20 that opens rearward. The lower part of the outlet 22 corresponds to the first part 221 in the first embodiment. The first air guide passage 41A extends rearward from the inlet 42A, and then extends forward rightward. The first outlet 43A of the first air guide passage 41A is on the downstream side of the heat sink 13 as in the first embodiment. Further, as shown in FIG. 13, the first outlet 43A is provided with a first outlet baffle 48A having an inclined surface that rises from the front to the rear.

  A part of the cooling air sent from the first fan 21 flows out from a part of the lower side of the blowout port 22 of the first fan case 20, and the first airflow is guided through the inlet 42A shown in FIGS. 13 and 16. It flows into the path 41A. The cooling air that has flowed into the first air guide passage 41A contacts the heat sink 13 and cools the heat sink 13 by heat transfer. The cooling air after cooling the heat sink 13 exits from the first air guide passage 41A via the first outlet 43A and cools the second heating coil 9B arranged in the rear.

  As shown in FIG. 16, the second air guide passage 51A is connected to the front first portion 321 of the outlet 32 of the second fan case 30. The second air guide passage 51A extends rightward and forward from the first portion 321 of the air outlet 32 that opens forward and rightward. The opening surface of the air outlet 32 is not parallel to the side plate 104 of the first housing 10 but is inclined rightward and forward. Then, a region continuous with the inlet 52A of the second air guide passage 51A extends so as to be orthogonal to the opening surface of the air outlet 32. The first outlet 53A of the second air guide passage 51A is located below the second heating coil 9B (see FIG. 12). Note that the second air guide passage 51A of the present embodiment is not provided with a configuration corresponding to the second outlet 54 of the first embodiment.

  A part of the cooling air sent from the second fan 31 flows into the second air guide passage 51A from the first portion 321 of the air outlet 32. Since the wall forming the region continuous with the inlet 52A of the second air guide passage 51A extends so as to be orthogonal to the opening surface of the air outlet 32, a flow parallel to this wall is formed. Therefore, the pressure loss of the cooling air in the second air guide passage 51A is reduced, the amount of the cooling air flowing in the second air guide passage 51A is increased, and the cooling efficiency of the object to be cooled is increased. The cooling air that has flowed into the second air guide passage 51A flows toward the right side and flows out of the second air guide passage 51A from the first outlet 53A. The cooling air flowing out from the first outlet 53A comes into contact with the second heating coil 9B (see FIG. 12) arranged above the first outlet 53A to cool the second heating coil 9B.

  Another part of the cooling air sent from the second fan 31 flows out of the second portion 322 of the outlet 32 into the space on the front side of the first coil baffle plate 71. Then, the cooling air from the second portion 322 of the outlet 32 cools the first heating coil 9A (see FIG. 12) located above the space.

  As shown in FIGS. 14 and 15, the third air guide passage 61A is connected to an upper portion of the blowout port 22 of the first fan case 20 that opens rearward. The upper portion of the outlet 22 corresponds to the second portion 222 in the first embodiment. The third air guide passage 61A is arranged at a position overlapping with a portion of the first air guide passage 41A (see FIG. 16) before reaching the drive substrate 11. A first flow dividing plate 65A that divides the flow passage into right and left is provided in the third air guide passage 61A. One and the other of the third air guide paths 61A divided by the first flow distribution plate 65A have different directions in which the cooling air is guided. As shown in FIGS. 13 and 15, the third air guide passage 61A on the left side of the first flow dividing plate 65A faces substantially rearward, and the third air guide passage 61A on the right side of the first flow dividing plate 65A moves rearward to the right. It is an arc toward. Further, there is no wall above the third air guide passage 61A, and the upper surface of the third air guide passage 61A is open and functions as an outlet for cooling air. More preferably, the member forming the bottom surface of the third air guide passage 61A is inclined upward from the inlet 62A toward the downstream side.

  A part of the cooling air delivered from the first fan 21 flows out from a portion above the air outlet 22 of the first fan case 20 and flows into the third air guide passage 61A via the inlet 62A. The cooling air that has flowed into the third air guide passage 61A travels rearward through the third air guide passage 61A divided into the left and right by the first flow distribution plate 65A. The cooling air flowing through the third air guide passage 61A, which is located on the left side of the first airflow dividing plate 65A and has an open upper surface, contacts the first heating coil 9A arranged above the third air guide passage 61A, and The heating coil 9A is cooled. By inclining the member forming the bottom of the third air guide passage 61A upward from the front to the rear, the flow of the cooling air can be directed upward. By doing so, the cooling air easily comes into contact with the first heating coil 9A, and the cooling effect of the first heating coil 9A is enhanced. Further, the cooling air flowing through the third air guide passage 61A located on the right side of the first flow distribution plate 65A flows toward the rear right while cooling the first heating coil 9A, and also cools the second heating coil 9B. Since the left and right walls forming the third air guide passage 61A are curved in an arc shape in a plan view, the pressure loss of the cooling air flowing through the third air guide passage 61A is suppressed.

  Further, regarding the same configuration as that of the first embodiment, the same operational effect as that of the first embodiment is produced also in the present embodiment.

Embodiment 3.
The present embodiment is different from the first and second embodiments in that a cooking chamber 81 is provided. In this embodiment, differences from the first and second embodiments will be mainly described. Further, this embodiment can be combined with each of the first and second embodiments.

  FIG. 17 is a perspective view of kitchen furniture 200 in which the heating cooker 100 according to the third embodiment is installed. As shown in FIG. 17, the heating cooker 100 includes a cooking chamber 81 at a position below the kitchen top plate 201 when incorporated in the kitchen furniture 200. The cooking chamber 81 has a door 811 and includes a heating device for heating the inside of the cooking chamber 81. A first front cover 93 is provided on the left side of the cooking chamber 81, and a second front cover 94 is provided on the right side.

  FIG. 18 is a perspective view illustrating an internal structure of heating cooker 100 according to the third embodiment. FIG. 18 shows the heating cooker 100 with the top plate 1 and the exhaust port cover 5 removed. The heating cooker 100 of the present embodiment includes a first housing 10B and a second housing 80 that houses the cooking chamber 81. The first front cover 93 and the second front cover 94 provided on the front part of the second housing 80 function as a design plate on the front side of the heating cooker 100. An intake port 931 is formed in the first front cover 93. Inside the first front cover 93, a space is formed which serves as an air passage for air flowing in through the intake port 931.

  Two second ventilation holes 107 are formed in the bottom plate 101B of the first housing 10B. The second vent 107 connects the upper side of the bottom plate 101B and the inside of the second housing 80.

  An exhaust duct 85 is provided in the second housing 80 below the left housing exhaust port 4. The exhaust duct 85 has therein an air passage for guiding the air in the second housing 80 and the cooking chamber 81 to the housing exhaust port 4. In FIG. 18, a state in which the exhaust duct 85 is visually recognized through the housing exhaust port 4 and the second ventilation port 107 is illustrated.

  An air guide member 40B is arranged below the first heating coil 9A and the second heating coil 9B. The air guide member 40B of the present embodiment has a different structure from the air guide member 40 of the first embodiment and the air guide member 40A of the second embodiment, as described later.

  FIG. 19 is a lower perspective view illustrating the internal structure of heating cooker 100 according to the third embodiment. FIG. 19 is a view of the heating cooker 100 in a state where the second housing 80 and the door 811 of the cooking chamber 81 are removed, as viewed from the lower side. An intake port 931 is also provided on the lower surface of the first front cover 93. The intake port 931 on the lower surface of the first front cover 93 of the present embodiment is not provided on the entire lower surface of the first front cover 93, but only on the left side, that is, in a part away from the cooking chamber 81. It is provided.

  A first intake duct 86 is provided behind the first front cover 93 and on the left side of the cooking chamber 81. The first intake duct 86 guides the air sucked from the intake port 931 of the first front cover 93 into the first housing 10B. The first front cover 93 and the first intake duct 86 are connected, and airtightness is secured at the connection point.

  Intake ports 941 are formed on the right and lower surfaces of the second front cover 94. Inside the second front cover 94, a space that serves as an air passage for the air flowing in through the intake port 941 is formed.

  The intake port 931 and the intake port 941 are inlets for cooling air for cooling the inside of the second housing 80, as described later. By providing the intake port 931 and the intake port 941 at a place other than the front surface of the heating cooker 100, it is difficult for the user to visually recognize the intake port 931 and the intake port 941 in the usage state. Since the intake port 931 and the intake port 941 do not impair the external appearance of the heating cooker 100, deterioration of the design of the heating cooker 100 is suppressed. Further, when the intake port 931 and the intake port 941 are provided on the front surface of the heating cooker 100, dust is likely to adhere to the intake port 931 and the intake port 941 because they are exposed to indoor air. However, according to the present embodiment, dust is unlikely to adhere to the intake port 931 and the intake port 941 that are arranged at positions that are less likely to be exposed to indoor air.

  A second intake duct 87 and a third fan case 90 are provided behind the second front cover 94 and on the right side of the cooking chamber 81. The second intake duct 87 guides the air sucked from the intake port 941 of the second front cover 94 to the third fan case 90. An air guide duct 88 is provided behind the third fan case 90. A first outlet 881 is formed on the right side surface of the air guide duct 88. The second front cover 94, the second intake duct 87, the third fan case 90, and the air guide duct 88 form a series of ventilation passages.

  An exhaust air duct inlet 109 is formed at the rear of the bottom plate 101B of the first housing 10B. The exhaust airflow inlet 109 is provided below the housing exhaust port 4 (see FIGS. 18 and 20).

  20: is a front side perspective view explaining the internal structure of the heating cooker 100 which concerns on Embodiment 3. FIG. FIG. 20 shows a state in which the first heating coil 9A, the second heating coil 9B, the door 811, the second front cover 94, and the top plate frame 105 are removed from FIG. A connection port 95 is formed on the front surface on the right side of the second housing 80. The connection port 95 is connected to the second front cover 94 (see FIG. 19), and airtightness is secured at the connection point. The second front cover 94 and the second housing 80 communicate with each other via the connection port 95. Although not shown in FIG. 20, the second housing 80 is provided with an opening corresponding to a connection port 95 that connects the inside of the second housing 80 and the inside of the first front cover 93. The first front cover 93 and the second front cover 94 are detachably attached to the second housing 80. Therefore, even if dust adheres to the intake port 931 and the intake port 941, the user can easily remove the dust. Therefore, an increase in pressure loss at the intake port 931 and the intake port 941 due to dust adhering to the intake port 931 and the intake port 941 is suppressed, and a decrease in cooling air volume and cooling efficiency is also suppressed.

  FIG. 21 is an exploded perspective view of the heating cooker 100 according to the third embodiment. In FIG. 21, the first housing 10B is shown in a lower perspective view, and the second housing 80 is shown in an upper perspective view. A first intake duct 86 is provided in the second housing 80. The first intake duct 86 has a first air passage 861 and a second air passage 862, and these air passages are independent of each other. The first intake duct 86 communicates with the intake port 931 via an air passage formed in the first front cover 93. On the upper side of the first air passage 861, the housing intake port 3 that communicates with the inside of the first fan case 20 (see FIG. 20) is arranged. The housing intake port 3 that communicates with the inside of the second fan case 30 (see FIG. 20) is arranged above the second air passage 862. The upper end of the first intake duct 86 forming the outlet of the first air passage 861 is connected to the bottom plate 101B in a state where airtightness is ensured between the first intake duct 86 and the bottom plate 101B. The upper end of the first intake duct 86 that constitutes the outlet of the second air passage 862 is connected to the bottom plate 101B in a state where airtightness is secured between the first intake duct 86 and the bottom plate 101B.

  A heat shield case 96 is provided above the cooking chamber 81. The heat shield case 96 covers the upper side of the cooking chamber 81 with a gap between it and the upper wall of the cooking chamber 81. The second outlet 882 of the air guide duct 88 is connected to the gap between the heat shield case 96 and the upper wall of the cooking chamber 81. The gap between the heat shield case 96 and the cooking chamber 81 functions not only as an air heat insulating layer but also as an air passage through which cooling air from the air guide duct 88 flows, as indicated by a dashed arrow.

  The exhaust duct 85 has an inlet 851 and an outlet 852. The exhaust duct 85 extends from the front to the rear, continuously extends upward, and has an L-shaped flow path inside when viewed from the side. The inlet 851 of the exhaust duct 85 communicates with the gap between the heat shield case 96 and the upper wall of the cooking chamber 81, and also communicates with the cooking chamber 81.

  As shown by the broken line arrow in FIG. 21, the cooling air that has flowed into the gap below the heat shield case 96 from the second outlet 882 of the air guide duct 88 flows in the lower side of the heat shield case 96 in the heat shield case. Contact 96 to cool it. The cooling air flowing under the heat shield case 96 flows through the inlet 851, the exhaust duct 85, and the outlet 852. In a state where the first casing 10B and the second casing 80 are assembled, the outlet 852 of the exhaust duct 85 passes through the exhaust air duct inlet 109 formed on the bottom plate 101B of the first casing 10B to form the first outlet 852. It is located inside the housing 10B (see FIG. 20). By cooling the heat shield case 96, heat transfer from the cooking chamber 81 to the first housing 10B arranged on the upper side of the heat shield case 96 is suppressed. By suppressing the heat transfer to the first housing 10B, it is possible to enhance the cooling efficiency of the components housed in the first housing 10B.

  Two second vent holes 107 are formed in the bottom plate 101B of the first housing 10B at positions that do not overlap the exhaust duct 85 in a plan view. A third ventilation hole 108 is formed on the left front side of the bottom plate 101B, and a first ventilation hole 106 is formed on the right front side of the bottom plate 101B. The third ventilation port 108 is arranged on the front side of the housing intake port 3. The first vent hole 106 is arranged on the right end of the bottom plate 101B and on the front side of the heat sink 13 arranged on the first housing 10B.

  22: is a figure explaining the structure which supplies cooling air to the lower side of the drive board 11 of the heating cooker 100 which concerns on Embodiment 3. FIG. An under-board air guide member 73 is provided between the end of the drive board 11 and the left side plate 104. The board lower air guide member 73 is a member for guiding the cooling air sent from the second fan case 30 (see FIG. 20) to the lower side of the drive board 11. The board lower air guide member 73 has a wall that stands up and down, and a part of this wall is formed with a first recess 731 and a second recess 732 whose upper ends are recessed more than others. The outlet 22 (see FIG. 23) of the first fan case 20 is connected to the first recess 731. The outlet 32 (see FIG. 23) of the second fan case 30 is connected to the second recess 732.

  An under-substrate shield member 74 is provided between the first recess 731 and the drive substrate 11. The under-substrate shield member 74 is a member for closing the upper and lower gaps between the drive substrate 11 and the bottom plate 101B to prevent the cooling air from flowing into the lower side of the drive substrate 11. The under-substrate shield member 74 is a vertically extending wall, and stands upright on the bottom plate 101B so as to contact the side edge of the drive substrate 11.

  On the other hand, a member corresponding to the under-substrate shield member 74 is not provided between the second recess 732 and the drive substrate 11. Therefore, the space below the drive substrate 11 is open at a position facing the second recess 732. The space below the drive board 11 is referred to as a fourth air guide path 75. The space above the second recess 732 connected to the outlet 32 (see FIG. 23) of the second fan case 30 functions as an inlet for cooling air to the fourth air guide passage 75.

  FIG. 23 is a cross-sectional view of the heating cooker 100 according to the third embodiment that passes through the first fan 21 and the second fan 31. In FIG. 23, the flow of the cooling air passing through the first air guide passage 41B or the second air guide passage 51B is indicated by a solid line arrow, and the flow passes through the fourth air guide passage 75 (see FIG. 22) below the drive substrate 11. The flow of wind is conceptually indicated by a dashed arrow.

  Inside the air guide member 40B, a first partition plate 45B partitions a part of the space inside the air guide member 40B into front and rear parts, and a first air guide passage 41B is formed on one side and a second air guide passage 51B is formed on the other side. Has been done. In the present embodiment, the configuration corresponding to the third air guide passage in the first and second embodiments is not provided.

  The first air guide passage 41B has an inlet 42B and a first outlet 43B. The heat sink 13 and the drive element 12 (see FIG. 22) thermally connected to the heat sink 13 are housed in the first air guide passage 41B. The first air guide passage 41B is an air passage for supplying cooling air to the heat sink 13. The inlet 42B is connected to the air outlet 22 of the first fan case 20. The first outlet 43B is provided at the end of the air guide member 40B that is farthest from the first fan case 20 in the flow direction of the cooling air from the first fan case 20. The first outlet 43B is a gap formed between the drive substrate 11 and the right end of the upper wall of the baffle member 40B.

  The second air guide passage 51B has an inlet 52B and a first outlet 53B. The second air guide passage 51B is an air passage for supplying cooling air to the second heating coil 9B (see FIG. 18). The inlet 52B is connected to the air outlet 32 of the first fan case 20. The first outlet 53B is located below the front portion of the second heating coil 9B (see FIG. 18). The first outlet 53B is a gap formed between the drive substrate 11 and the right end of the upper wall of the air guide member 40B.

  The first fan case 20 is installed such that the opening surface of the air outlet 22 is substantially parallel to the side plate 104. In the flow direction of the cooling air from the first fan case 20, the first partition plate 45B forming the side wall of the first air guide passage 41B extends from the air outlet 22 toward the downstream side of the first air passage 41B. Inclined backward to increase width. As shown by the solid line arrow in FIG. 23, the cooling air blown from the air outlet 22 flows while diffusing in the air passage that expands along the first partition plate 45B, cooling the heat sink 13, and the first outlet 43B. Exit the first air duct 41B from. The cooling air that has exited from the first outlet 43B is guided to the right side plate 104 of the first housing 10B and cools the second heating coil 9B (see FIG. 18) arranged rearward.

  As shown by the solid line arrow in FIG. 23, the cooling air blown from the air outlet 32 flows through the second air guide passage 51B. Since the second air guide passage 51B does not have a heat-generating component such as the heat sink 13 which has a high temperature, the rising temperature of the cooling air flowing through the second air guide passage 51B is the same as that of the cooling air flowing through the first air passage 41B. Smaller than. The low-temperature cooling air that has flowed through the second air guide passage 51B exits the first outlet 53B and cools the second heating coil 9B (see FIG. 18) installed in the rear.

  Further, as shown by the broken line arrow in FIG. 23, a part of the cooling air from the air outlet 32 flows into the fourth air guide passage 75 formed on the lower side of the drive substrate 11. The outlet 32 and the fourth air guide passage 75 communicate with each other through the second recess 732 shown in FIG. The cooling air that has flowed into the fourth air guide passage 75 flows under the drive substrate 11. The second fan case 30 is installed such that the opening surface of the outlet 32 is inclined with respect to the side plate 104. Specifically, the opening surface of the blowout port 32 faces the diagonal of the corner closest to the blowout port 32 among the four corners of the drive substrate 11. For this reason, the cooling air easily spreads over the entire lower surface of the drive substrate 11. The air in the fourth air guide passage 75 functions as a heat insulating layer that suppresses heat transfer from the cooking chamber 81 below the first housing 10B to the drive substrate 11. By suppressing the heat transfer from the cooking chamber 81 to the drive substrate 11, the cooling efficiency of the heat sink 13 mounted on the drive substrate 11 can be improved.

  The cooling airflow that has flowed through the fourth airflow guide path 75 exits the fourth airflow guide path 75 from the end portion on the right side of the drive substrate 11, and together with the cooling airflow that has flowed through the second air guide path 51B, the second heating coil 9B ( (See FIG. 18). In this way, the cooling air from the second fan case 30 is divided into the second air guide passage 51B on the upper side of the drive board 11 and the fourth air guide passage 75 on the lower side of the drive board 11, and then merges. It is used for cooling the second heating coil 9B (see FIG. 18). Therefore, the pressure loss of the second fan 31 is reduced as compared with the case where the cooling air is sent from the second fan case 30 only to the second air guide passage 51B. Since the pressure loss decreases, the amount of cooling air used for cooling the second heating coil 9B increases, and the cooling efficiency of the second heating coil 9B can be increased.

  FIG. 24 is a plan view of the first front cover 93 and the first intake duct 86 according to the third embodiment. The first air intake duct 86 connected to the rear side of the first front cover 93 is provided with a first air passage 861 and a second air passage 862. The first air passage 861 guides the air sucked from the intake port 931 to the first fan 21 (see FIG. 23) of the first fan case 20. The upper end of the first intake duct 86, which is the outlet of the first air passage 861, is attached to the lower surface of the first housing 10B so as to surround the housing intake port 3 (see FIG. 21). The second intake duct 87 guides the air sucked from the intake port 931 to the second fan 31 (see FIG. 23) of the second fan case 30. The upper end of the first intake duct 86, which is the outlet of the second air passage 862, is attached to the lower surface of the first housing 10B so as to surround the housing intake port 3 (see FIG. 21).

  25 is a cross-sectional view taken along the line AA of FIG. In FIG. 25, the flow of cooling air is conceptually shown by arrows. The second air passage 862 is an L-shaped passage in a side view that extends rearward and further extends upward. The second air passage 862 is connected to the intake port 931 formed in the upper portion of the side surface of the intake port 931 of the first front cover 93. The cooling air sucked from the intake port 931 flows rearward through the air passage in the first front cover 93 and the second air passage 862 of the first intake duct 86, and then rises to the second air passage. It flows upward from 862.

  FIG. 26 is a sectional view taken along line BB of FIG. In FIG. 26, the flow of cooling air is conceptually shown by arrows. The first air passage 861 is an L-shaped passage in a side view that extends rearward and extends further upward. The first air passage 861 is connected to, among the intake ports 931 of the first front cover 93, the intake ports 931 formed in the lower side surface and the bottom surface of the first front cover 93. The cooling air sucked from the intake port 931 flows backward in the air passage in the first front cover 93 and in the first air passage 861 in the first intake duct 86, and then rises to the first wind. It flows upward from the path 861. The cooling air flowing out from the first air passage 861 is sucked into the first fan 21, sent out from the first fan case 20, and used for cooling the heat sink 13 in the first air guide passage 41B. Here, since the hot air moves upward due to buoyancy, the air around the first front cover 93 in the installed state of the heating cooker 100 has a lower temperature on the lower side than on the upper side. Therefore, by supplying the air sucked from the air intake 931 provided on the side wall and the bottom surface of the first front cover 93 to the heat sink 13, the temperature of the first heating coil 9A and the second heating coil 9B can be kept higher than that of the first heating coil 9A and the second heating coil 9B. The low heat sink 13 can be cooled efficiently.

  Further, as shown in FIGS. 21 and 24 to 26, a second air passage 862 is arranged between the first air passage 861 through which the cooling air supplied to the heat sink 13 flows and the cooking chamber 81. . The second air passage 862 functions as a heat insulating portion that suppresses heat from the cooking chamber 81 from being transferred to the first air passage 861. Therefore, the temperature of the cooling air flowing through the first air passage 861 is suppressed from increasing, and the cooling air having a lower temperature is supplied to the heat sink 13, so that the cooling efficiency of the heat sink 13 can be improved.

  As can be seen by comparing FIG. 25 and FIG. 26, the air passage from the intake port 931 at the upper side surface of the first front cover 93 to the outlet of the second air passage 862 has a lower side surface and a bottom surface of the first front cover 93. Is longer than the air passage from the intake port 931 to the outlet of the first air passage 861. Therefore, the pressure loss in the second air passage 862 is larger than the pressure loss in the first air passage 861. Therefore, it is preferable to make the opening area of the intake port 931 connected to the second air passage 862 larger than the opening area of the intake port 931 connected to the first air passage 861. By doing so, the difference in the suctioned air volume between the first fan 21 and the second fan 31 is suppressed, and the increase in noise of the second fan 31 is suppressed.

  FIG. 27 is a perspective view of the cooking chamber 81 and its peripheral components according to the third embodiment. A first heating device 821 that heats the inside of the cooking chamber 81 is provided on the upper wall of the cooking chamber 81. The first heating device 821 is, for example, a resistance heating element. A second heating device 822 that heats the inside of the cooking chamber 81 is provided below the cooking chamber 81. The second heating device 822 is, for example, a heating coil, and heats the cooking plate placed in the cooking chamber 81 by high-frequency magnetic flux to heat the food item placed on the cooking plate. Note that the specific configurations of the first heating device 821 and the second heating device 822 are not limited to those described above, and any device that heats the inside of the cooking chamber 81 may be used. Specific examples of the first heating device 821 and the second heating device 822 include a resistance heating element, an induction heating coil, a microwave heating device, and superheated steam. The cooking chamber 81 can be used as, for example, a grill, a microwave oven, or a rice cooker.

  FIG. 28 is a perspective view of the air guide duct 88 and its peripheral components according to the third embodiment. An air guide duct 88 is provided behind the third fan case 90. The air guide duct 88 constitutes an air passage for guiding the cooling air sent from the third fan case 90 to the cooling target. The object to be cooled in the present embodiment is the drive circuit 83 that drives the first heating device 821 and the second heating device 822, and the drive circuit 83 is mounted with heat-generating components 831, 832, 833, 834. The heat generating component 831 is, for example, a drive element that constitutes an inverter circuit, and the heat generating component 832 is a heat sink that is thermally connected to the drive element. The heat generating component 833 is, for example, a transformer, and the heat generating component 834 is, for example, a heat sink. A first outlet 881 is provided at a downstream portion of the air guide duct 88 in the flow direction of the cooling air from the third fan case 90.

  FIG. 29 is a vertical cross-sectional view of the heating cooker 100 according to the third embodiment that passes through the third fan case 90. In FIG. 29, the flow of the cooling air is conceptually shown by arrows. The air outlet 92 of the third fan case 90 is connected to the air guide duct 88. The lower end of the outlet of the third fan case 90 is located below the lower end of the drive circuit 83 on which the heat generating components 831 to 834 are mounted. That is, the cooling air blown rearward from the air outlet 92 flows under the drive circuit 83. The cooling air sent from the third fan 91 in the third fan case 90 flows into the air guide duct 88 through the air outlet 92. The air guide duct 88 is provided with flow distribution plates 891 and 892 that are arranged so that their flat plate surfaces face forward and backward and extend vertically. The flow distribution plate 891 is provided at a position facing a part of the air outlet 92, and guides the cooling air from the air outlet 92 upward. A heat generating component 832 is housed between the flow dividing plate 891 and the front wall of the air guide duct 88, and the heat generating component 832 is cooled by the cooling air guided by the flow dividing plate 891. The flow dividing plate 892 is on the downstream side of the flow dividing plate 891 in the flow of the cooling air, and guides the cooling air from the air outlet 92 upward. A heat-generating component 833 is disposed between the flow dividing plate 891 and the flow dividing plate 892 which are arranged with a gap in the front and rear, and the heat generating component 833 is generated by the cooling air flowing between the flow dividing plate 891 and the flow dividing plate 892. To be cooled.

  Of the cooling air flowing through the air guide duct 88, the cooling air that has flowed upward along the flow dividing plates 891 and 892 flows out through the second outlet 882 of the air guide duct 88, as shown in FIG. Then, it flows through the gap formed between the heat shield case 96 and the upper wall of the cooking chamber 81.

  The flow distribution plate 893 is a plate-shaped member that is arranged so that its flat plate surface faces vertically and extends in the front-rear direction. The flow dividing plate 893 is arranged with a gap between it and the bottom plate of the air guide duct 88. The gap between the flow distribution plate 893 and the bottom plate of the air guide duct 88 serves as an air passage through which the cooling air flows. The cooling air blown from the air outlet 92 flows rearward along the upper surface of the flow dividing plate 893, and is guided to the rear wall extending vertically of the air guide duct 88 and rises. In this process, the heat generating component 834 is cooled by the cooling air. The cooling air that has cooled the heat-generating component 834 flows into the second housing 80 via the first outlet 881 (see FIG. 28).

  The flow of the cooling air from the third fan case 90 is generated in the second housing 80, so that the first ventilation hole 106 provided in the front side of the first housing 10B housed in the second housing 80 is provided. , A suction force is generated to the lower side of the first housing 10B. Then, the air in the first housing 10B flows to the lower side of the first housing 10B via the first ventilation port 106, and moves backward in the second housing 80 along the bottom plate 101B of the first housing 10B. Flows to. At least a part of the cooking chamber 81 is arranged below a straight line connecting the first ventilation port 106 and the exhaust airflow inlet 109. Therefore, the cooling air flowing in the second housing 80 contacts the cooking chamber 81 and cools it in the process of flowing toward the exhaust airflow inlet 109. The high-temperature air tends to stay above the second housing 80, that is, around the first housing 10B. However, by forming the flow of the cooling air from the first ventilation port 106 to the exhaust air passage inlet 109 around the bottom plate 101B of the first housing 10B, the high temperature air around the first housing 10B is discharged. Can be urged.

  FIG. 30 is a vertical cross-sectional view through the first heating device 821 and the second heating device 822 of the heating cooker 100 according to the third embodiment. In FIG. 30, the flow of cooling air is conceptually shown by arrows. A second vent 107 is formed in the bottom plate 101B of the first housing 10B at a position rearward of the cooking chamber 81. The cooling air that has cooled the heat sink 13 and has flowed out of the first air guide passage 41B of the air guide member 40B flows rearward, and flows through the second ventilation port 107 formed in the bottom plate 101B to the first housing 10B. It flows down. The cooling air that has flowed into the second housing 80 below the first housing 10 </ b> B flows through the second housing 80 and flows out from the housing exhaust port 4. In the heating cooker 100 of the present embodiment, a space is formed between the rear wall of the second housing 80 and the cooking chamber 81. Here, the air warmed around the cooking chamber 81 tends to stay in this space. However, as in the present embodiment, by providing the second ventilation port 107 on the downstream side of the first air guide passage 41B of the bottom plate 101B and on the upstream side of the housing exhaust port 4, the first air guide passage is obtained. The cooling air that has flowed out of 41 flows toward the housing exhaust port 4 to promote the discharge of the air inside the second housing 80. Therefore, the temperature inside the second housing 80 is suppressed from increasing.

  Note that, as shown in FIG. 21, the second ventilation port 107 is not formed above the exhaust duct 85. Therefore, the air flowing from the second ventilation port 107 to the lower side of the first housing 10B is unlikely to come into contact with the exhaust duct 85. Therefore, the temperature of exhaust gas from the cooking chamber 81 flowing through the exhaust duct 85 is unlikely to be lowered. In other words, the exhaust gas from the cooking chamber 81 is exhausted through the exhaust duct 85 while keeping the high temperature state. Therefore, the exhaust heat in the cooking chamber 81 is promoted, and the cooling effect in the second housing 80 is enhanced. By suppressing the temperature rise in the second housing 80, the cooling effect of the heat generating components 831 to 834 shown in FIG. 29 can be enhanced.

  FIG. 31 is a vertical cross-sectional view of the heating cooker 100 according to the third embodiment at a position that passes through the second ventilation port 107 and the third ventilation port 108 and is on the left outer side of the width of the cooking chamber 81. is there. In FIG. 31, the flow of cooling air is conceptually shown by arrows. At least a part of the third ventilation port 108 is formed outside the width of the cooking chamber 81 on the left side. Therefore, the cooling air flowing from the third ventilation port 108 to the lower side of the first casing 10B flows rearward on the left side of the cooking chamber 81 and flows out through the casing exhaust port 4. Although high-temperature air is likely to stay around the cooking chamber 81, discharge of the high-temperature air is promoted in the process in which the cooling air flows from the third ventilation port 108 to the housing exhaust port 4. As shown in FIG. 31, the first intake duct 86 is arranged on the left side in the second housing 80, but the high temperature air is retained by the cooling air flowing from the third vent 108 to the housing exhaust port 4. By suppressing, the temperature rise in the first intake duct 86 is suppressed. Therefore, the temperature of the cooling air sent from the first fan case 20 and the second fan case 30 is suppressed from rising, and the cooling effect of the object to be cooled is also enhanced.

  In the first to third embodiments, the centrifugal first fan 21 and the second fan 31 that rotate clockwise (clockwise) have been described as an example, but a blower that rotates counterclockwise (counterclockwise) is used. It can also be adopted. In that case, the 1st fan 21, the 2nd fan 31, and the member connected to this can be arrange | positioned left-right opposite to Embodiments 1-3.

  DESCRIPTION OF SYMBOLS 1 top plate, 2 heating ports, 3 housing intake ports, 4 housing exhaust ports, 5 exhaust port covers, 6 operation parts, 7 display parts, 8 drainage ports, 9A first heating coil, 9B second heating coil, 10 1st case, 10B 1st case, 11 drive board, 12 drive element, 13 heat sink, 14 power supply control board, 20 1st fan case, 21 1st fan, 22 blower outlet, 30 2nd fan case, 31st 2 fans, 32 air outlets, 40 air guide members, 40A air guide members, 40B air guide members, 41 first air passages, 41A first air passages, 41B first air passages, 42 inlets, 42A inlets, 42B Inlet, 43 1st outlet, 43A 1st outlet, 43B 1st outlet, 44 Upper wall, 45 1st partition plate, 45B 1st partition plate, 46 2nd partition plate, 47 Shielding part, 48 1st outlet baffle plate , 48A 1st exit air guide plate, 49 air guide plate, 51 2nd air guide path, 51A 2nd air guide path, 51B 2nd air guide path, 52 inlet, 52A inlet, 52B inlet, 53 1st outlet, 53A 1st Outlet, 53B first outlet, 54 second outlet, 61 third air duct, 61A third air duct, 62 inlet, 62A inlet, 63 first outlet, 64 second outlet, 65A first flow distribution plate, 71st 1 coil air guide plate, 72 second coil air guide plate, 73 lower board air guide member, 74 lower board shield member, 75 fourth air guide path, 80 second housing, 81 cooking chamber, 83 drive circuit, 85 exhaust Duct, 86 first intake duct, 87 second intake duct, 88 air duct, 90 third fan case, 91 third fan, 92 air outlet, 93 first front cover, 94 second front cover, 95 connection port, 96 heat shield case, 100 cooking Vessel, 101 bottom plate, 101B bottom plate, 102 front plate, 103 rear plate, 104 side plate, 105 top plate frame, 106 first ventilation port, 107 second ventilation port, 108 third ventilation port, 109 exhaust airflow inlet port, 200 Kitchen furniture, 201 kitchen top, 202 storage, 203 thickness, 221 first part, 222 second part, 321 first part, 322 second part, 731 first recess, 732 second recess, 811 door, 821 1 heating device, 822 2nd heating device, 831 heat generating component, 832 heat generating component, 833 heat generating component, 834 heat generating component, 851 inlet, 852 outlet, 861 first air passage, 862 second air passage, 881 first outlet, 882 Second outlet, 891 flow distributor, 892 flow distributor, 893 flow distributor, 931 intake port, 941 intake port.

Claims (23)

A top plate,
A heating coil provided under the top plate,
With the first fan,
A first fan case accommodating the first fan and having a suction port and a blow port formed therein;
A second fan provided behind the first fan;
A second fan case that accommodates the second fan, has a suction port and an outlet port, and is provided so as to at least partially overlap the first fan case in the width direction in a front view;
An inlet connected to the outlet of the first fan case, and a first air guide member forming a first air passage having a first outlet,
A drive element included in an inverter circuit that supplies a high-frequency current to the heating coil,
A heat cooker, which is attached to the drive element, and which includes a heat sink disposed in the first air guide passage. The heating coil includes a first heating coil and a second heating coil arranged at a position farther from the first fan than the first heating coil,
The outlet of the second fan case includes a first portion and a second portion,
A second air guide member forming a second air guide having an inlet connected to the first portion of the outlet of the second fan case and a first outlet formed below the second heating coil. The cooking device according to claim 1. The heating cooker according to claim 2, wherein a second outlet facing the lower surface of the first heating coil is formed on the upper wall of the second air guide member. The outlet of the first fan case includes a first portion and a second portion,
A third air guide member forming a third air guide passage having an inlet connected to the second portion of the outlet of the first fan case and a first outlet formed below the first heating coil. Equipped with
The heating cooker according to claim 2 or 3, wherein the first portion of the air outlet of the first fan case is connected to the inlet of the first air guide passage. The heating cooker according to claim 4, wherein a second outlet facing the lower surface of the first heating coil is formed on the upper wall of the third air guide member. The heating cooker according to claim 4 or 5, wherein the first portion and the second portion of the outlet of the first fan case are arranged side by side in a horizontal direction. The heating cooker according to claim 4, wherein the first portion and the second portion of the outlet of the first fan case are arranged vertically. The third air guide member is provided with a first flow distribution plate that stands up and down and divides the third air guide passage into right and left,
The heating cooker according to claim 7, wherein the one air passage and the other air passage divided by the first flow distribution plate have different directions in which cooling air flows out. The said 2nd part of the said blower outlet of the said 2nd fan case is not connected to the said 2nd air guide path, and is arrange | positioned under the said 1st heating coil. The heating cooker according to 1 above. On the downstream side of the second portion of the outlet of the second fan case, there is provided a first coil baffle plate that stands up and down and has a planar shape along at least a part of the outer shape of the first heating coil. The heating cooker according to claim 6, which is provided. A second coil air guide that stands up and down on the downstream side of the first outlet of the first air guide passage and guides cooling air from the first outlet of the first air guide passage to the second heating coil. A plate is provided, The heating cooker as described in any one of Claims 2-7. The first outlet baffle plate having an inclined surface that rises rearward is provided at the first outlet of the first baffle passage. Heating cooker. A substrate on which the inverter circuit is mounted,
The under-board shield member that blocks the inflow of cooling air to the underside of the substrate is provided on the downstream side of the air outlet of the first fan case. The cooker described. The heating cooker according to claim 13, wherein a fourth air guide passage through which cooling air from the outlet of the second fan case flows is formed on a lower side of the substrate. A first housing that houses the heating coil, the first fan case, the second fan case, the first air guide member, the drive element, and the heat sink;
A second housing connected below the first housing;
A cooking chamber housed in the second housing;
A first air passage that communicates with the suction port of the first fan case and a second air passage that does not communicate with the first air passage but communicates with the suction port of the second fan case are formed inside. The cooker according to any one of claims 1 to 14, further comprising: A casing exhaust port is formed in the first casing,
The heating cooker according to claim 15, wherein an exhaust duct that connects the housing exhaust port and the inside of the second housing is provided inside the second housing. A first vent hole communicating with the inside of the second housing is formed on the bottom of the first housing,
The heating cooker according to claim 16, wherein at least a part of the cooking chamber is arranged below a line connecting the first ventilation port and the housing exhaust port. The bottom of the first casing is a downstream side of the first air guide passage and an upstream side of the casing exhaust port, and a second casing for communicating the inside of the first casing with the inside of the second casing. The heating cooker according to claim 16 or 17, wherein a vent is formed. The third vent hole that connects the inside of the first casing and the inside of the second casing is formed outside the width of the cooking chamber, at the bottom of the first casing. The heating cooker according to any one of 18. A third fan case housed in the second housing and housing a third fan;
A heating device that is housed in the second housing and heats the inside of the cooking chamber;
A drive circuit that is housed in the second housing and drives the heating device;
Between the upper wall of the cooking chamber and the bottom of the first housing, there is formed a ventilation gap,
The cooking device according to any one of claims 15 to 19, wherein the gap is located on the downstream side of the drive circuit in the direction of air flow from the outlet of the third fan. 21. The heating cooker according to claim 20, further comprising an air guide duct that communicates the air outlet of the third fan case with the gap and accommodates at least a part of the drive circuit. The drive circuit includes a plurality of heat generating components,
The heating cooker according to claim 21, wherein a distribution plate that separates the plurality of heat-generating components from each other is provided in the air duct. The heating cooker according to any one of claims 20 to 22, wherein a lower end of the outlet of the third fan case is located below a lower end of the drive circuit.

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