Heating cooker

Abstract

To obtain a heating cooker which can suppress adhesion of steam or oily smoke or the like from a pan on a top plate section to a wall or diffusion of steam or oily smoke or the like to a room, the heating cooker having an exhaust port opened to a side in the top plate section.SOLUTION: A heating cooker includes: a top plate section on which a pan is installed; a body provided under the top plate section; and an exhaust port which is provided in the top plate section, is opened toward a side, and makes air in the body flow out. The top plate section has an air channel for connecting an inflow port communicating with the inside of the body and the exhaust port. The air channel has an upper section air guide section and a lower section air lower section provided under the upper section air guide section and has air guide means which is provided on an upstream side of the exhaust port and guides air to an obliquely upper side toward the exhaust port. A vertical dimension of a first position to be an end on the exhaust port side in the air channel is smaller than that of a second position on an upstream side of the air guide means in the air channel. A center in a vertical direction at the first position is positioned above a center in a vertical direction at the second position.SELECTED DRAWING: Figure 10

Description

Technical Field

[0001] The present disclosure relates to a cooking appliance having an exhaust port for cooling air for cooling components inside the cooking appliance.

Background Art

[0002] Conventionally, an integrated cooking appliance having a top portion on which a pot is placed and incorporated into a kitchen has been proposed (see, for example, Patent Document 1). The cooking appliance described in Patent Document 1 includes an opening in a side wall of at least one side of the top portion, and this opening is used as an air intake port or an exhaust port for cooling the inside of the main body.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, when an opening is provided in the side wall of the top portion, i.e., the top plate portion, and used as an exhaust port as in the technology of Patent Document 1 described above, the exhaust flows out from the inside to the outside of the top plate portion and generally flows horizontally along the kitchen top plate. Here, generally, there is a kitchen wall behind the cooking appliance, and the exhaust port faces the kitchen wall. For this reason, the exhaust flowing out from the exhaust port collides with the kitchen wall, and air turbulence is likely to occur behind the cooking appliance. Then, the water vapor or fumes generated from the pot placed on the top plate portion of the cooking appliance are attracted by the air behind the cooking appliance, and dirt due to condensation or oil aggregation is likely to adhere to the kitchen wall. When a ventilation device is installed above the cooking appliance, although the water vapor or fumes from the pot are supposed to be sucked by the ventilation device, due to the air turbulence caused by the air flow from the exhaust port provided in the side wall of the top plate portion, the vapor or fumes tend to adhere to the kitchen wall before being sucked by the ventilation device. Also, when the cooking appliance is installed in an island kitchen without a kitchen wall behind it, the water vapor or fumes from the pot are diffused due to the air turbulence caused by the air flow from the exhaust port described above, and are likely to flow into rooms such as the living room or dining room adjacent to the kitchen.

[0005] The present disclosure has been made against the background of the problems described above, and provides a cooking appliance provided with a top plate portion having an exhaust port opening laterally, which can suppress the adhesion of water vapor or fumes from a pot on the top plate portion to the wall or the diffusion into a room.

Means for Solving the Problems

[0006] The cooking heater according to the present disclosure includes a top plate portion on which a pot is placed, a housing provided below the top plate portion, and an exhaust port provided on the top plate portion and opening laterally to allow the air in the housing to flow out. The top plate portion has an air passage connecting an inlet communicating with the inside of the housing and the exhaust port. The air passage has an upper air guiding portion and a lower air guiding portion provided below the upper air guiding portion. A wind guiding means is provided upstream of the exhaust port to guide air obliquely upward toward the exhaust port. The vertical dimension of a first position, which is the end portion on the exhaust port side in the air passage, is smaller than the vertical dimension of a second position upstream of the wind guiding means in the air passage, and the center in the vertical direction of the first position is above the center in the vertical direction of the second position.

Advantages of the Invention

[0007] According to the present disclosure, a wind guiding means is provided in the air passage leading to the exhaust port provided on the side surface portion of the top plate portion, and the air flowing out from the exhaust port flows upward. Therefore, the air flowing out from the exhaust port forms an air curtain, which can suppress the water vapor or oil fumes from the pot placed on the top plate portion from adhering to the wall or diffusing into the room.

Brief Description of the Drawings

[0008]

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Modes for Carrying Out the Invention

[0009] Hereinafter, embodiments of the cooking heater according to the present disclosure will be described with reference to the drawings. Note that the present disclosure is not limited by the forms of the drawings shown below. In the following description, terms indicating directions (for example, "up", "down", "right", "left", "front", "rear", etc.) are used as appropriate for ease of understanding, but this is for the purpose of explanation, and these terms do not limit the present disclosure. The terms indicating directions are used based on the installation state of the cooking heater. Also, in each figure, those with the same reference numerals are the same or corresponding ones, which is common throughout the entire specification.

[0010] Embodiment 1. An installation example of the cooking heater 100 according to Embodiment 1 will be described. FIG. 1 is a diagram showing a state in which the cooking heater 100 according to Embodiment 1 is installed. FIG. 1 shows a state in which the cooking heater 100 is installed in a so-called built-in kitchen having a kitchen counter 200, a kitchen wall 201, and a storage cabinet 202. The cooking heater 100 is inserted into a mounting hole provided in the kitchen counter 200. In the kitchen counter 200, a storage cabinet 202 having one or more slide-out doors is provided below the cooking heater 100. Behind the cooking heater 100, the kitchen wall 201 extends on the kitchen counter 200. A ventilation device may be installed above the cooking heater 100. Note that the kitchen counter 200, the kitchen wall 201, and the storage cabinet 202 shown in FIG. 1 are part of the kitchen, and other facilities that can constitute the kitchen are not shown. Also, the door of the storage cabinet 202 is not limited to a pull-out type and may be a double-opening type.

[0011] The cooking heater 100 has a top plate portion 1 disposed on the kitchen counter 200. On the top plate portion 1, one or more display portions 3, one or more operation portions 4, and one or more heating ports 5 are provided. The display portion 3 displays information regarding settings such as heating menus or heating conditions of the cooking heater 100, and the operating state of the cooking heater 100. The display portion 3 is configured by, for example, a liquid crystal display or a lamp. The operation portion 4 is an input device that receives inputs regarding heating conditions such as heating temperature or heating time, and operation instructions such as heating start or stop. The operation portion 4 is configured by a hardware button or a touch panel. The heating port 5 indicates a position where a pot is placed. The heating port 5 is configured by printing, unevenness, or the like provided on the top plate portion 1.

[0012] FIG. 2 is a perspective view from the rear of the cooking heater 100 according to Embodiment 1. Below the top plate portion 1, a housing 2 is provided. The housing 2 is inserted into the kitchen counter 200 shown in FIG. 1 when the cooking heater 100 is installed.

[0013] Among the front, rear, left, and right side faces of the top plate portion 1, at least one of them is provided with a frame exhaust port 17. The frame exhaust port 17 is an exhaust port that is provided in the top plate portion 1 and opens laterally to allow the air inside the housing 2 to flow out. The frame exhaust port 17 is the outlet of the exhaust gas generated inside the housing 2 of the cooking heater 100. In the present embodiment, a frame exhaust port 17 that opens laterally (rearward) is provided on the rear side face of the top plate portion 1, that is, the rear face. The frame exhaust port 17 of the present embodiment is arranged to face the kitchen wall 201 shown in FIG. 1 when the cooking heater 100 is installed.

[0014] The top plate portion 1 includes a plate 10, an upper frame 11 that surrounds the front and left and right peripheries of the plate 10, and a rear upper frame 13 provided at the upper part behind the plate 10. The plate 10 is made of a material that does not inhibit electromagnetic induction heating, such as glass or ceramic. The structure of the top plate portion 1 will be described later.

[0015] FIG. 3 is an exploded perspective view from below of the cooking heater 100 according to Embodiment 1. A housing intake port 7 composed of a plurality of openings is provided at the bottom of the housing 2. The housing intake port 7 is the inlet of the air for cooling the heat generating components provided inside the housing 2 into the housing 2. In the present embodiment, the housing intake port 7 is provided in front of the cooking heater 100, and the frame exhaust port 17 is provided behind the cooking heater 100, and the air flowing into the housing 2 from the front flows rearward and flows out from the frame exhaust port 17.

[0016] A drain port 6 composed of a plurality of openings is provided at the rear of the bottom of the housing 2. The drain port 6 is the outlet of the liquid such as the water flowing into the housing 2 or the condensed water.

[0017] On the outer peripheral portion of the lower surface of the plate 10 of the top plate portion 1, a lower frame 12 is provided. The lower frame 12 holds the outer peripheral portion of the lower surface of the plate 10 from below and suppresses damage to the plate 10. Behind the lower frame 12, one or more frame inlets 16 are provided. The frame inlet 16 is an inlet for air into an air passage 30 (see FIGS. 10 and 12), which will be described later, formed between the lower frame 12 and the rear upper frame 13. At least a part of the edge of the frame inlet 16 is provided with a wall-like drain wall 18 extending downward. The water adhering to the edge of the frame inlet 16 falls along the drain wall 18 and flows out of the housing 2 from the drain port 6 of the housing 2 to the outside of the housing 2.

[0018] On the outer peripheral portion of the lower surface of the lower frame 12, a seal member 15 is provided. The seal member 15 is made of a material such as silicon or rubber and is attached to the lower frame 12 with high water tightness. When the cooking heater 100 is installed on the kitchen counter 200 (see FIG. 1), the seal member 15 contacts the upper surface of the kitchen counter 200 and suppresses the water accumulated on the kitchen counter 200 from flowing into the housing 2 side from below the top plate portion 1.

[0019] FIG. 4 is an exploded perspective view from above of the cooking heater 100 according to the first embodiment. The rear upper frame 13 is disposed above the frame inlet 16 formed in the lower frame 12. On the upper surface of the rear upper frame 13, an inclined surface 131, an upper surface recess 132, and an upper surface protrusion 133 are formed. These structures will be described later with reference to FIG. 10. Also, on the lower surface of the rear upper frame 13, an engaging portion 134 that engages with the lower frame 12 is provided. The structure of the engaging portion 134 will be described later with reference to FIG. 6.

[0020] Between adjacent frame inlets 16, a first rectifying means 19 is provided. The first rectifying means 19 is a member that rectifies the lateral flow of air flowing upward from below through the frame inlet 16 and reduces the lateral diffusion of the air.

[0021] At the rear end of the lower frame 12, a rear lower frame 14 is provided. The structure of the rear lower frame 14 will be described later.

[0022] Inside the housing 2, one or more heating coils 20 are provided. The heating coil 20 is provided below the heating port 5 and is an example of heating means for heating the pot placed on the heating port 5. When a high-frequency current is supplied to the heating coil 20, eddy currents are generated in the pot that intersects with the magnetic flux generated by the high-frequency current, and the pot is heated to a high temperature by the Joule heat generated by these eddy currents. Instead of or in addition to the heating coil 20 for inductively heating the pot, an electric heater such as a radiant heater may be provided as the heating means.

[0023] Below the heating coil 20, a substrate case 21 with an open rear surface is provided. The substrate case 21 houses a drive circuit board 27 (see FIG. 8) and heat dissipation fins 22. The substrate case 21 functions as a flow path for cooling air to cool the heat-generating components mounted on the drive circuit board 27. The cooling air flowing through the substrate case 21 flows out from the opening at the rear of the substrate case.

[0024] FIG. 5 is an exploded perspective view of the top plate portion 1 according to Embodiment 1. The top plate portion 1 includes a plate 10, and an upper frame 11, a lower frame 12, a rear upper frame 13, and a rear lower frame 14 that protect it. The upper frame 11, the lower frame 12, the rear upper frame 13, and the rear lower frame 14 are made of a metal such as stainless steel or aluminum. The plate 10 is sandwiched between the upper frame 11 having a U-shaped planar shape and the lower frame 12 having a frame-shaped planar shape, and the outer peripheral portion is protected by the upper frame 11 and the lower frame 12. The upper frame 11 may be formed by combining a plurality of members or by bending a single member. The rear lower frame 14 is a rod-shaped member arranged to extend in the left-right direction.

[0025] The enlarged view A of FIG. 5 shows the structure related to the connection between the upper frame 11 and the rear lower frame 14. An engaging portion 111 is provided at the rear end on the right side of the upper frame 11, and an engaging portion 141 is provided at the end on the left side of the rear lower frame 14. By engaging the engaging portion 111 with the engaging portion 141, the upper frame 11 and the rear lower frame 14 are connected. Since the rod-shaped rear lower frame 14 with a risk of deformation is connected to the upper frame 11, the deformation and damage of the rear lower frame 14 are suppressed. The engaging portion 111 of the present embodiment is a cylindrical protruding portion, and the engaging portion 141 is a hole, and the engaging portion 111 is inserted into the engaging portion 141. In addition, engaging portions 111 and 141 are also provided on the left sides of the upper frame 11 and the rear lower frame 14, respectively. Note that the specific shapes of the engaging portion 111 and the engaging portion 141 are not limited to the example of FIG. 5. For example, the uneven relationship between them may be reversed, or the upper frame 11 and the rear lower frame 14 may be connected by screws or bolts, etc.

[0026] The rear lower frame 14 is placed on the lower frame 12. The rear lower frame 14 and the lower frame 12 may be adhered with a silicon resin or the like. By integrating the rear lower frame 14 and the lower frame 12, the deformation and damage of the rear lower frame 14 are suppressed. Further, by using a material that does not allow water, such as silicon resin, as an adhesive, it is possible to prevent a liquid such as water from entering the heating cooker 100 from between the lower frame 12 and the rear lower frame 14.

[0027] FIG. 6 is a perspective view from below of the rear upper frame 13 and the first rectifying means 19 according to Embodiment 1. The first rectifying means 19 includes first and second portions 191 and 192 that are parallel to each other and have surfaces extending in the vertical and front-rear directions, and these are disposed between adjacent frame inlets 16 (see FIG. 4) to rectify the air. The first rectifying means 19 of the present embodiment has a third portion 193 that connects the first portion 191 and the second portion 192, and a member having a U-shaped planar shape is configured. The surfaces of the first portion 191 and the second portion 192 reduce the lateral diffusion of the air and suppress the generation of vortices due to the mutual interference of the air from each frame inlet 16, thereby reducing the turbulence of the air flow. Since the first portion 191 and the second portion 192 are disposed between the frame inlets 16 (see FIG. 4), they do not impede the air flow from the frame inlets 16, and an increase in pressure loss can also be suppressed.

[0028] As shown in the enlarged view B of FIG. 6, an engaging portion 134 is provided on the lower surface of the rear upper frame 13. The engaging portion 134 of the present embodiment is composed of two ribs extending in the left-right direction, and the engaging portion 121 is inserted between these ribs (see FIG. 10). Further, in the present embodiment, the engaging portion 134 has a structure for fixing the first rectifying means 19. Specifically, a rectifying means engaging portion 135, which is a groove, is formed in the front rib of the engaging portion 134, and the first portion 191 or the second portion 192 of the first rectifying means 19 is inserted into this groove. When the first rectifying means 19 is engaged with the rectifying means engaging portion 135, the upper end of the first rectifying means 19 contacts the lower surface of the rear upper frame 13. The first rectifying means 19 also functions as a member that supports the rear upper frame 13. By supporting the lower surface of the rear upper frame 13, which is long in the left-right direction, with a plurality of first portions 191 and second portions 192 spaced apart in the left-right direction, deformation and damage of the rear upper frame 13 can be suppressed.

[0029] By increasing the number of the first rectifying means 19, the rectifying effect can be enhanced, and the interval for supporting the rear upper frame 13 can be narrowed, thereby enhancing the effect of suppressing deformation and damage of the rear upper frame 13. Note that one or more members having a plane parallel to these may be provided so as to protrude from the third portion 193 between the first portion 191 and the second portion 192. By doing so, the rectifying effect and the effect of supporting the rear upper frame 13 can be enhanced without increasing the number of components.

[0030] As shown in the enlarged view C of FIG. 6, a lower surface recess 136 and a lower surface protrusion 137 are formed on the lower surface (the upper side on the paper surface of FIG. 6) of the rear upper frame 13. The lower surface recess 136 is a portion where the lower surface of the rear upper frame 13 is recessed upward, and is provided across the left - right direction of the rear upper frame 13. The lower surface protrusion 137 is provided at the rear end of the rear upper frame 13, and is a portion protruding downward more than the lower surface recess 136. The lower surface protrusion 137 is provided across the left - right direction of the rear upper frame 13.

[0031] FIG. 7 is an exploded perspective view of the members arranged in the housing 2 of the cooking heater 100 according to the first embodiment. A cooling duct 24 through which the cooling air supplied to the heating coils 20 flows is provided below the two front - side heating coils 20. The cooling duct 24 of the present embodiment is continuous with the substrate case 21, and a part of the circuit board can also be arranged in the cooling duct 24. A cooling air outlet 25 is formed on the upper surface of the cooling duct 24. The cooling air outlet 25 faces the lower surface of the heating coil 20, and the cooling air blown out from the cooling air outlet 25 contacts the two front - side heating coils 20 to cool them. The cooling air that has cooled the two front - side heating coils 20 flows toward the rear where the frame exhaust port 17 (see FIG. 9) is provided, and in the process, contacts the heating coil 20 arranged at the rear to cool it.

[0032] FIG. 8 is a perspective view of the members arranged in the housing 2 of the cooking heater 100 according to Embodiment 1. FIG. 8 shows a state in which the substrate case 21 and the cooling duct 24 are removed from the state shown in FIG. 7. In the housing 2, a blowing means 26 is provided. The blowing means 26 in the present embodiment includes a scroll casing and a centrifugal fan housed therein, sucks air from an air inlet (not shown) disposed opposite to the housing air inlet 7 (see FIG. 3), and blows out cooling air from a blowout port that opens rearward. The blowout port of the blowing means 26 is connected to the cooling duct 24 (see FIG. 7), and the cooling air sent out from the blowing means 26 flows through the cooling duct 24 and the substrate case 21 (see FIG. 7) connected thereto. In the present embodiment, an example in which two blowing means 26 are provided is shown, but the number of blowing means 26 may be one or three or more. Further, the blowing means 26 may include an axial fan instead of the centrifugal fan.

[0033] On the drive circuit board 27, heat generating components such as inverter elements that supply high-frequency current to the heating coil 20 are mounted. Further, heat radiation fins 22 are thermally connected to the heat generating components of the drive circuit board 27. The heat generating components of the drive circuit board 27 and the heat radiation fins 22 are cooled by the cooling air from the blowing means 26.

[0034] FIG. 9 is a schematic longitudinal sectional view along the front-rear direction of the cooking heater 100 according to Embodiment 1. FIG. 9 shows a cross section of the cooking heater 100 passing through the heating coil 20 disposed at the left front, together with the cross sections of the kitchen counter 200, the kitchen wall 201, and the storage 202. The dashed arrows X1, X2, and X3 shown in FIG. 9 conceptually indicate the flow of the cooling air.

[0035] In the state where the cooking appliance 100 is installed on the kitchen counter 200, the space where the cooking appliance 100 is installed communicates with the interior of the room through the gap of the kitchen counter 200. In the example of FIG. 9, there is a gap between the kitchen counter 200 and the door of the storage cabinet 202. When the air blowing means 26 of the cooking appliance 100 operates, as shown by the arrow X1, the air passing through the gap of the kitchen counter 200 is sucked into the housing 2 from the housing air intake port 7 facing the suction port of the air blowing means 26. The sucked air is sent rearward and flows into the cooling duct 24. A part of the air flowing into the cooling duct 24 flows rearward to cool the drive circuit board 27 and the heat dissipation fins 22, and flows out of the cooking appliance 100 from the frame exhaust port 17. The rest of the air flowing into the cooling duct 24 flows upward through the cooling air outlet 25 as shown by the dashed arrow X2 to cool the heating coil 20, flows rearward, and merges with the air that has cooled the drive circuit board 27 and flows out of the cooking appliance 100 from the frame exhaust port 17.

[0036] Here, the cooking appliance 100 of the present embodiment makes the air flowing out from the frame exhaust port 17 go upward to form an upward air current as shown by the dashed arrow X3 behind the cooking appliance 100. When water vapor, oil fumes, or odor substances, etc. are generated from the pot placed on the top plate portion 1 of the cooking appliance 100, the upward air current formed behind the cooking appliance 100 becomes an air curtain, reducing the adhesion of dirt to objects behind the cooking appliance 100 such as the kitchen wall 201. Even when there is no kitchen wall 201 behind the cooking appliance 100 and a space such as a living room spreads, by forming an air curtain, it is possible to suppress the diffusion of water vapor, oil fumes, or odor substances, etc. into the space. The structure for raising the air flowing out from the frame exhaust port 17 like this will be specifically described below.

[0037] FIG. 10 is a schematic cross-sectional view of the rear part of the cooking heater 100 according to Embodiment 1. FIG. 10 shows a longitudinal section along the front-rear direction passing through the frame inlet 16. In the engaging portion 134 formed by two ribs of the rear upper frame 13, the engaging portion 121 is press-fitted between the ribs, whereby the rear upper frame 13 is fixed to the lower frame 12. Thus, in the present embodiment, by press-fitting the engaging portion 121 into the engaging portion 134, the lower frame 12 and the rear upper frame 13 can be fixed without using other fastening members, so that an increase in the number of parts can be suppressed. Note that the specific structure for fixing the lower frame 12 and the rear upper frame 13 is not limited to the illustrated example, and fastening members such as screws or bolts may be used.

[0038] In a state where the rear upper frame 13 is fixed to the lower frame 12 in this way, an air passage 30 is provided between the lower frame 12 and the rear upper frame 13 above the frame inlet 16. The air passage 30 is an air flow passage having the frame inlet 16 as an inlet and the frame outlet 17 as an outlet. In the present embodiment, the frame outlet 17 is a gap formed between the rear upper frame 13 and the rear lower frame 14. In FIG. 10, the air from the housing 2 located below the paper surface of the frame inlet 16 rises, enters the air passage 30 from the frame inlet 16, and the air that has entered the air passage 30 flows backward and flows out from the frame outlet 17.

[0039] In the air passage 30, as air guiding means for guiding the air in the air passage 30 obliquely upward, an upper air guiding portion and a lower air guiding portion provided below the upper air guiding portion are provided. In the present embodiment, the air guiding surface 138 of the rear upper frame 13 functions as the upper air guiding portion, and the inclined surface 142 of the rear lower frame 14 functions as the lower air guiding portion. The air guiding surface 138 is a part of the lower surface of the rear upper frame 13 and is a region in front of the lower surface recess 136. The air guiding surface 138 of the present embodiment is a horizontal plane. The inclined surface 142 is the upper surface of the rear lower frame 14 and is inclined so as to rise from front to rear. The inclined surface 142 is disposed at the downstream end of the air passage 30. With such an air guiding surface 138 and inclined surface 142, the cross-sectional area of the air passage 30 decreases from the frame inlet 16 toward the frame outlet 17.

[0040] The end portion of the air passage 30 on the frame outlet 17 side is referred to as a first position 31, and the position on the upstream side of the air flow from the air guiding means in the air passage 30 is referred to as a second position 32. In FIG. 10, the vertical dimensions of the first position 31 and the second position 32 are indicated by double-headed arrows, and the centers of these vertical dimensions are indicated as center 31P and center 32P, respectively. The vertical dimension of the first position 31 is smaller than the vertical dimension of the second position 32, and the center 31P of the first position 31 is above the center 32P of the second position 32.

[0041] Thus, the cross-sectional area of the air passage 30 decreases from the frame inlet 16 toward the frame outlet 17 and the vertical center of the air passage 30 rises. As a result, the air flowing through the air passage 30 flows obliquely upward while increasing the wind speed. Therefore, the air flowing out from the frame outlet 17 becomes an upward air current directed obliquely upward and can form the above-described air curtain.

[0042] Further, in the present embodiment, the height dimension h2 from the lower end of the top plate portion 1 to the lower end of the frame exhaust port 17 is larger than the height dimension h1 from the upper end of the top plate portion 1 to the upper end of the frame exhaust port 17. Generally, there is a desire to keep the protruding height of the cooking appliance 100 from the upper surface of the kitchen counter 200 as low as possible, so there are restrictions on the height of the top plate portion 1 placed on the kitchen counter 200. On the other hand, when spillage occurs from the pot on the top plate portion 1, there is also a desire to suppress the liquid from entering the housing 2 through the exhaust port. For this reason, by setting the height position of the frame exhaust port 17 in the top plate portion 1 such that dimension h1 < dimension h2, the position of the frame exhaust port 17 becomes higher while there are restrictions on the height dimension of the top plate portion 1, and the intrusion of liquid into the frame exhaust port 17 can be suppressed. In order to suppress the intrusion of the liquid flowing on the kitchen counter 200 into the frame exhaust port 17, considering the surface tension of water, dimension h2 is preferably 3 mm or more, more preferably 4.5 mm or more.

[0043] The rear lower frame 14 having the inclined surface 142 which is the lower air guiding portion is fixed to the upper frame 11 as described with reference to FIG. 5. If displacement of the rear lower frame 14 occurs, the air guiding effect of the inclined surface 142 may decrease, but according to the present embodiment, such a problem can be suppressed.

[0044] Further, in the present embodiment, the rear upper frame 13 constituting the upper air guiding portion and the rear lower frame 14 constituting the lower air guiding portion are formed of separate members, and both are connected to the lower frame 12 which constitutes at least a part of the lower surface of the top plate portion 1. That is, the rear upper frame 13 and the rear lower frame 14 are connected via the lower frame 12, and they are not directly connected to each other. If a dedicated member for connecting the rear upper frame 13 and the rear lower frame 14 is provided temporarily, the member may cause an increase in pressure loss and turbulence of the air flow, but according to the present embodiment, such a situation can be avoided. Also, since there is no member for connecting the rear upper frame 13 and the rear lower frame 14 on the upstream side of the frame exhaust port 17, the frame exhaust port 17 can have a simple slit-like shape, and the design property of the cooking appliance 100 can be improved.

[0045] On the upper surface of the rear upper frame 13, an inclined surface 131, an upper surface concave portion 132, and an upper surface convex portion 133 are provided in order from the front of the paper surface of FIG. 10. The inclined surface 131 is a surface inclined so as to descend from the rear to the front. The inclined surface 131 illustrated in FIG. 10 is a flat plate surface, but may be a curved surface. By providing the inclined surface 131 that descends from the rear to the front in this way, when a liquid such as water adheres to the inclined surface 131, the liquid flows forward due to gravity, so that it is possible to suppress the liquid from flowing into the housing 2 from the frame exhaust port 17.

[0046] Further, a downwardly recessed upper surface concave portion 132 is provided behind the inclined surface 131. The upper surface concave portion 132 is recessed below the inclined surface 131 and causes the liquid that has flowed over the inclined surface 131 to convect. By providing the upper surface concave portion 132 that convects such a liquid, it is possible to suppress the liquid from flowing into the housing 2 from the frame exhaust port 17. Note that the upper surface concave portion 132 may be inclined so as to descend from the center in the left-right direction toward the left and right ends. By doing so, the liquid staying in the upper surface concave portion 132 flows left or right due to gravity, so that the liquid can be discharged from the rear upper frame 13 avoiding the frame exhaust port 17.

[0047] The upper surface convex portion 133 provided behind the upper surface concave portion 132 extends along the width direction of the frame exhaust port 17 and protrudes to a position higher than the upper surface concave portion 132. The upper surface convex portion 133 protrudes to a position higher than the highest position of the inclined surface 131. By providing such an upper surface convex portion 133, when the water level of the liquid flowing into the upper surface concave portion 132 rises, the liquid can be made to flow to the inclined surface 131 side without flowing into the frame exhaust port 17.

[0048] The first rectifying means 19 is provided between the rear upper frame 13 and the lower frame 12 and is clamped by them. The upper end of the first rectifying means 19 is in contact with the lower surface of the rear upper frame 13 that constitutes the upper end of the air passage 30, and the lower end of the first rectifying means 19 is in contact with the upper surface of the lower frame 12 that constitutes the lower end of the air passage 30. By such first rectifying means 19, the vertical position of the rear upper frame 13 is positioned, and the size of the air passage 30 formed below the rear upper frame 13 is fixed within a certain range. Therefore, variations in the pressure loss of the air passage 30 can be suppressed.

[0049] On the lower surface of the rear upper frame 13, a lower surface concave portion 136 and a lower surface convex portion 137 are provided. The lower surface convex portion 137 is a wall-like portion extending downward. By providing such a lower surface convex portion 137, the liquid adhering to the end portion on the back side of the rear upper frame 13 falls along the lower surface convex portion 137, so that the intrusion of liquid from the frame exhaust port 17 can be suppressed.

[0050] Also, in front of the lower surface convex portion 137, a lower surface concave portion 136 that is recessed upward is provided. Due to the lower surface concave portion 136, the front surface of the lower surface convex portion 137 is raised, so that the liquid adhering to the lower surface convex portion 137 can be prevented from entering the inside of the air passage 30 along the lower surface of the rear upper frame 13.

[0051] FIG. 11 is a plan view of the cooking heater 100 according to Embodiment 1. FIG. 11 shows a state in which the rear upper frame 13 is removed. The first rectifying means 19 is arranged between adjacent frame inlets 16. The surfaces of the first rectifying means 19 along the vertical, front - rear directions are arranged parallel to each other, and guide the air from the frame inlet 16 linearly rearward. By the first rectifying means 19, the diffusion of air in the left - right direction is suppressed, and the air flowing out from the frame exhaust port 17 (see FIG. 10) can be made to flow along the front - rear direction, so that an air curtain can be generated well.

[0052] FIG. 12 is a schematic cross-sectional view of the rear part of the cooking heater 100 according to Embodiment 1. FIG. 12 shows a longitudinal section along the front-rear direction passing through the frame inlet 16. In FIG. 10, a cross-section passing through the engaging portion 121 engaged with the engaging portion 134 was shown, but in FIG. 12, a cross-section passing through the first rectifying means 19 engaged with the engaging portion 134 is shown. The first rectifying means 19 is inserted into the engaging portion 134 composed of two ribs. The first rectifying means 19 shown in FIG. 12 corresponds to the third portion 193 described in FIG. 6. FIG. 13 is an enlarged view of the region including the lower surface convex portion 137 of FIG. 12.

[0053] The lower end of the lower surface convex portion 137 is located behind the top portion 143 of the rear lower frame 14. Here, the top portion 143 of the rear lower frame 14 is the end portion on the back side of the inclined surface 142 and is the portion at the highest position on the upper surface of the rear lower frame 14. In FIG. 13, the vertical line passing through the lower surface convex portion 137 is indicated by line L1, and the vertical line passing through the top portion 143 of the rear lower frame 14 is indicated by line L2. As shown by line L1 and line L2 in FIG. 13, since the top portion 143 is in front of the lower end of the lower surface convex portion 137, when liquid drops from the lower surface convex portion 137, the liquid drops onto the kitchen counter 200 behind the top portion 143 and is less likely to flow onto the inclined surface 142. Therefore, it is possible to prevent the liquid dropped from the lower surface convex portion 137 from entering the air passage 30.

[0054] If liquid enters the air passage 30 from the frame exhaust port 17, the liquid drops along the drain wall 18 extending downward from the edge of the frame inlet 16. For this reason, it is possible to prevent the liquid from moving forward along the lower surface of the top plate portion 1. The liquid that has dropped along the drain wall 18 is discharged to the outside of the housing 2 through the drain port 6 provided at the bottom of the housing 2.

[0055] Below the frame inlet 16 and the drain wall 18, a substrate case 21 is arranged. Therefore, the water that has fallen from the drain wall 18 falls along the surface of the substrate case 21 and does not contact the drive circuit board 27. Further, the outlet 211, which is the outlet of the cooling air from the substrate case 21, is located in front of the frame inlet 16 and the drain wall 18, and in a plan view, the frame inlet 16, the drain wall 18, and the outlet 211 do not overlap. Therefore, the water that has fallen from the drain wall 18 does not enter the substrate case 21 from the outlet 211. In this way, since the contact of the liquid with the drive circuit board 27 is suppressed, the failure of the components mounted on the drive circuit board 27 due to the contact of the liquid can be suppressed.

[0056] Embodiment 2. In the present embodiment, a configuration example of the air guiding means different from that of the first embodiment will be described. In the present embodiment, the description will be centered on the differences from the first embodiment, and the description of the common configurations will be omitted as appropriate. In addition, for the configurations specific to the present embodiment, a subscript A will be added to the reference numerals.

[0057] FIG. 14 is a perspective view from the rear of the cooking heater 100A according to the second embodiment. The top plate portion 1A of the present embodiment includes a plate 10, an upper frame 11A, a lower frame 12A (see FIG. 15), and a rear upper frame 13A. In the first embodiment, the frame exhaust port 17 was formed by the vertical gap between the rear upper frame 13 and the rear lower frame 14, but in the present embodiment, a plurality of openings constituting the frame exhaust port 17A are formed in the rear upper frame 13A. The frame exhaust port 17A is formed by performing pressing or cutting on the metal material, which is the base material constituting the rear upper frame 13A. Since the rear upper frame 13A has a base material connecting the upper surface and the lower surface between the plurality of frame exhaust ports 17A, deformation and damage of the rear upper frame 13A can be suppressed. The frame exhaust port 17A of the present embodiment is provided on the side surface, that is, the rear surface, behind the top plate portion 1A, and exhausts backward, similar to the first embodiment.

[0058] FIG. 15 is a perspective view from below of the top plate portion 1A according to Embodiment 2. In the lower frame 12A, a plurality of frame inlets 16 are provided side by side in the left-right direction, similarly to Embodiment 1. Between adjacent frame inlets 16, fastening members 40A such as screws or bolts for vertically connecting the lower frame 12A and the rear upper frame 13A are provided.

[0059] FIG. 16 is an exploded perspective view from below of the top plate portion 1A according to Embodiment 2. On the lower surface of the rear upper frame 13A, an engaging portion 139A having a screw hole for engaging the fastening member 40A is provided. In the lower frame 12A, through-holes 122A into which the fastening member 40A is inserted are provided between adjacent frame inlets 16. As shown in the enlarged view D, the first rectifying means 19A has recesses with downwardly concave upper surfaces in the first portion 191 and the second portion 192, and through-holes 194A into which the fastening member 40A is inserted are provided at the bottoms of the recesses. In the recess above the through-hole 194A, a downwardly projecting engaging portion 139A (see FIG. 17) is inserted. By inserting the engaging portion 139A of the rear upper frame 13A into the recess formed by recessing a part of the first rectifying means 19A, the height dimension when the lower frame 12A and the rear upper frame 13A are overlapped is suppressed.

[0060] With the through-hole 122A, the through-hole 194A, and the engaging portion 139A overlapping, in a state where the lower frame 12A, the first rectifying means 19A, and the rear upper frame 13A are overlapped in order from below, the fastening member 40A is inserted into the through-hole 122A, the through-hole 194A, and the engaging portion 139A and tightened. By doing so, the rear upper frame 13A, the first rectifying means 19A, and the lower frame 12A are integrated.

[0061] In the present embodiment, by connecting the lower frame 12A and the rear upper frame 13A with the fastening member 40A, the plate 10 sandwiched between the lower frame 12A and the rear upper frame 13A can be fixed more strongly. As a result, since the strength of the top plate portion 1A is increased, even when the heating cooker 100A is detached or attached to the kitchen and a drop or collision occurs, deformation or damage of the top plate portion 1A can be reduced.

[0062] FIG. 17 is a perspective view from below a part of the rear upper frame 13A according to Embodiment 2. The engaging portion 139A provided on the lower surface of the rear upper frame 13A has, in this embodiment, a pair of plate-shaped protrusions arranged opposite to each other, and the tip of the fastening member 40A (see FIG. 16) engages between these protrusions. The engaging portion 139A formed of plate-shaped protrusions can be configured by, for example, forming a plate-shaped portion on the lower surface of the rear upper frame 13A by extrusion molding and using the remaining portion obtained by cutting off a part of this plate-shaped portion. The structure of the engaging portion 139A shown in FIG. 17 is an example, and the engaging portion 139A may be configured by attaching a component such as a nut that meshes with the thread groove of the fastening member 40A to the lower surface of the rear upper frame 13A by caulking or welding.

[0063] FIG. 18 is a plan view of a part of the rear of the cooking heater 100A according to Embodiment 2. FIG. 18 shows a state in which the rear upper frame 13A is removed. The fastening member 40A passes vertically through the through hole 194A provided in the first rectifying means 19A.

[0064] In the upper frame 11A of this embodiment, the rear end is engaged with the lower frame 12A, and the upper frame 11A and the lower frame 12A are fixed.

[0065] FIG. 19 is a schematic longitudinal sectional view along the front-rear direction of the cooking heater 100A according to Embodiment 2. FIG. 19 shows a cross section of the cooking heater 100A passing through the heating coil 20 arranged in the upper left front, together with the cross sections of the kitchen counter 200, the kitchen wall 201, and the storage 202. The dashed arrows X1, X2, X3 shown in FIG. 19 conceptually indicate the flow of the cooling air.

[0066] Also in this embodiment, the air flowing out from the frame exhaust port 17A flows upward and forms an air curtain in front of the kitchen wall 201. The structure for raising the air flowing out from the frame exhaust port 17A will be described with reference to FIG. 20 shown below.

[0067] FIG. 20 is a schematic cross-sectional view of the rear part of the cooking heater 100A according to Embodiment 2. FIG. 20 shows a longitudinal section along the front-rear direction passing through the frame inlet 16. In the engaging portion 134 formed by two ribs of the rear upper frame 13A, the first rectifying means 19A is inserted between the ribs. Similar to Embodiment 1, the rear upper frame 13A is provided with an inclined surface 131, an upper surface recess 132, and an upper surface protrusion 133. When spillage occurs on the top plate portion 1A, these prevent liquid from entering the frame exhaust port 17A. Note that the upper surface protrusion 133 shown in FIG. 20 has a flat upper surface, which is different from the triangular cross-sectional shape of the upper surface protrusion 133 shown in Embodiment 1, but they have the same function of blocking liquid.

[0068] Also, on the lower surface of the rear upper frame 13A, a lower surface recess 136 and a lower surface protrusion 137 are provided, similar to Embodiment 1. Although the cross-sectional shape of the lower surface recess 136 in this embodiment is different from that of the lower surface recess 136 in Embodiment 1, the functions and effects are the same as those described in Embodiment 1.

[0069] In the air passage 30, as air guiding means for guiding the air in the air passage 30 obliquely upward, an upper air guiding portion and a lower air guiding portion provided below the upper air guiding portion are provided. In the present embodiment, the air guiding surface 138 of the rear upper frame 13A functions as the upper air guiding portion, and the first wall 1310A and the second wall 1311A provided below the rear upper frame 13A function as the lower air guiding portion. The first wall 1310A is a wall provided at a position facing downward with respect to the lower surface convex portion 137, and a frame exhaust port 17A is formed between the first wall 1310A and the lower surface convex portion 137. The second wall 1311A is provided on the upstream side of the first wall 1310A in the air flow direction in the air passage 30, and is a wall protruding upward from below. A recess 1312A having a height lower than these is provided between the first wall 1310A and the second wall 1311A. The height of the first wall 1310A is higher than the height of the second wall 1311A. Therefore, the cross-sectional area of the air passage 30 passing through the second wall 1311A is larger than the cross-sectional area of the air passage 30 passing through the first wall 1310A. Further, the upper surface of the lower frame 12A, which is located on the upstream side of the second wall 1311A and constitutes the edge of the frame inlet 16, is at a position lower than the second wall 1311A as shown in FIG. 20. Therefore, the cross-sectional area of the air passage 30 passing through the upper surface of the lower frame 12A is larger than the cross-sectional area of the air passage 30 passing through the second wall 1311A.

[0070] Thus, in the present embodiment, the air passage 30 has a reduced cross-sectional area and the center in the vertical direction of the air passage 30 rises from the frame inlet 16 toward the frame exhaust port 17A. As a result, the air flowing through the air passage 30 flows obliquely upward while increasing the wind speed. Therefore, the air flowing out from the frame exhaust port 17A becomes an upward air current directed obliquely upward, and the above-described air curtain can be formed.

[0071] In FIG. 20, a connecting line that virtually connects the edge of the frame inlet 16 and the upper surface of the first wall 1310A is indicated by a two-dot chain line. The height of the second wall 1311A is below the height of the connecting line indicated by the two-dot chain line. By doing so, although the second wall 1311A is a protrusion provided in a part between the frame inlet 16 and the frame exhaust port 17A, the cross-sectional area of the air passage 30 can be gradually reduced. Thereby, while suppressing an increase in pressure loss, an upward airflow directed obliquely upward can be formed.

[0072] As shown in FIG. 20, it is desirable that the surface of the second wall 1311A on the frame inlet 16 side is a curved surface or an inclined surface that rises from the upstream side to the downstream side of the air flow. By doing so, air can be more smoothly guided obliquely upward.

[0073] Also, in the present embodiment, the upper air guiding portion and the lower air guiding portion are constituted by a rear upper frame 13A which is an integral member. In this way, by configuring the upper air guiding portion and the lower air guiding portion as part of the same component, the number of parts and the assembly man-hours can be reduced as compared with the case of combining separate members. Further, since no step that may occur when combining separate members occurs, the design property is excellent.

[0074] Also, as a connecting portion that connects the lower frame 12A that constitutes the plurality of frame inlets 16 and the rear upper frame 13A, a fastening member 40A is provided. This fastening member 40A is disposed between adjacent frame inlets 16 among the plurality of frame inlets 16 (see FIGS. 16 and 18). Therefore, the fastening member 40A hardly inhibits the flow of air flowing from the frame inlet 16, and the pressure loss of exhaust due to the fastening member 40A can be reduced. Also, the fastening member 40A hardly hinders the rectifying effect by the first rectifying means 19A.

[0075] When spillage or the like occurs above the top plate portion 1A, the liquid falls along the lower surface convex portion 137, and a part of it adheres to the first wall 1310A and may enter the air passage 30. However, the liquid adhering to the first wall 1310A flows into the recess 1312A and is stored in the recess 1312A. Therefore, it is possible to suppress the liquid from flowing into the housing 2 from the frame inlet 16. The moisture of the liquid accumulated in the recess 1312A comes into contact with the air passing through the air passage 30 and evaporates. Since the air passing through the air passage 30 is the air that has cooled the heat-generating components in the housing 2 and is the air heated by the waste heat, the moisture in the recess 1312A can be evaporated in a short time. The recess 1312A may be inclined so as to descend from the center in the left-right direction toward the left and right ends. By doing so, the liquid staying in the recess 1312A flows left or right due to gravity, so that the liquid can be discharged to the outside from the left and right of the rear upper frame 13A.

[0076] The structure and positional relationship of the drain wall 18, the substrate case 21, and the outlet 211 of the substrate case 21 are the same as those in the first embodiment, and the same operational effects as those in the first embodiment can be obtained. Although not shown in FIG. 20, the relationship of h1 < h2 described in FIG. 10 is also adopted in this embodiment, and the same effects as those in the first embodiment can be obtained.

[0077] Embodiment 3. In this embodiment, a configuration example of a different air guiding means and a rectifying means from those in the first embodiment and the second embodiment will be described. In this embodiment, the description will be centered on the differences from the first embodiment and the second embodiment, and the description of the common configurations will be omitted as appropriate. Also, for the configurations specific to this embodiment, a subscript B will be added to the reference numerals.

[0078] FIG. 21 is a perspective view of the cooking appliance 100B according to Embodiment 3 as seen from the rear. The top plate portion 1B of the present embodiment includes a plate 10, an upper frame 11B, a lower frame 12 (see FIG. 22), a rear upper frame 13B, and a rear lower frame 14. In the present embodiment, a frame exhaust port 17B is formed by the vertical gap between the rear upper frame 13B and the rear lower frame 14. Although not shown, the upper frame 11B includes an engaging portion 111 as in Embodiment 1, and the rear lower frame 14 includes an engaging portion 141 as in Embodiment 1. By engaging the engaging portion 111 and the engaging portion 141, the rear lower frame 14 is engaged with the upper frame 11B. Further, the rear lower frame 14 is fixed to the lower frame 12 (see FIG. 22) as in Embodiment 1.

[0079] FIG. 22 is a perspective view of the rear portion of the cooking appliance 100B according to Embodiment 3. FIG. 23 is an exploded perspective view of the rear portion of the top plate portion 1B according to Embodiment 3. In the present embodiment, a first rectifying means 19B and a second rectifying means 50B are provided as rectifying means. The first rectifying means 19B has a first portion 191, a second portion 192, and a third portion 193 as in Embodiment 1, and is a member having a U-shaped planar shape. In the first rectifying means 19B of the present embodiment, as shown in FIG. 22, an engaging portion 195B is provided at the rear ends of the first portion 191 and the second portion 192. The engaging portion 195B is a portion that engages with the second rectifying means 50B. The engaging portion 195B of the present embodiment is formed by a groove that recesses the surfaces of the first portion 191 and the second portion 192 that extend along the vertical and front-rear directions.

[0080] The second rectifying means 50B includes a rectifying portion 51B, a first frame installation surface 52B, a second frame installation surface 53B, and an engaging portion 54B. The rectifying portion 51B is a surface that extends along the vertical and front-rear directions. The second rectifying means 50B of the present embodiment includes a plurality of rectifying portions 51B, and these are respectively disposed between the first portion 191 and the second portion 192 of the first rectifying means 19B to rectify air.

[0081] The first frame installation surface 52B has a surface extending along the front-rear and left-right directions and is connected to the lower end of the rectifying portion 51B. The first frame installation surface 52B is placed on the lower frame 12. The second frame installation surface 53B has a surface extending along the front-rear and left-right directions and is connected to the upper end of the rectifying portion 51B. The second frame installation surface 53B contacts the lower surface of the rear upper frame 13B. When the rectifying portion 51B is regarded as the first surface, the second frame installation surface 53B is regarded as the second surface, a rectifying portion 51B different from the first surface is regarded as the third surface, and the first frame installation surface 52B is regarded as the fourth surface, the first surface, the second surface, the third surface, and the fourth surface are connected in this order, and a continuous concavo-convex shape is formed as a whole.

[0082] When the first frame installation surface 52B is in surface contact with the lower frame 12 and the second frame installation surface 53B is in surface contact with the lower surface of the rear upper frame 13B, the rear upper frame 13B can be supported more firmly with respect to the lower frame 12. Therefore, even when a load or impact is applied to the rear upper frame 13B, the effect of reducing the deformation and damage of the rear upper frame 13B can be enhanced.

[0083] Engaging portions 54B extending along the front-rear and left-right directions are provided at the left and right ends of the second rectifying means 50B in the left-right direction. In the present embodiment, a plurality of second rectifying means 50B, each taking the engaging portion 54B, the first frame installation surface 52B, the rectifying portion 51B, the second frame installation surface 53B, the rectifying portion 51B, the first frame installation surface 52B, and the engaging portion 54B as one unit, are provided. The engaging portion 54B engages with the engaging portion 195B of the first rectifying means 19B or the engaging portion 112B of the upper frame 11B to position the second rectifying means 50B.

[0084] In the present embodiment, in addition to the first part 191 and the second part 192 that suppress the diffusion of exhaust gas in the left-right direction, it also has a rectifying part 51B of the second rectifying means 50B that also suppresses the diffusion of exhaust gas in the left-right direction. The first part 191, the second part 192, and the rectifying part 51B are arranged parallel to each other. Therefore, by the first part 191, the second part 192, and the rectifying part 51B, air can be rectified at a shorter interval in the left-right direction compared to the first embodiment. Therefore, the diffusion of exhaust gas in the left-right direction is further suppressed, and an air curtain can be efficiently formed. As a result, the adhesion of dirt to the kitchen wall 201 can be further reduced.

[0085] FIG. 24 is a plan view of a part of the rear portion of the cooking heater 100B according to the third embodiment. FIG. 24 shows a state in which the rear upper frame 13B is removed. The engaging part 54B of the second rectifying means 50B is fitted into the groove that is the engaging part 54B of the first rectifying means 19B. Further, the engaging part 54B at the left and right ends of the second rectifying means 50B is fitted into the groove that is the engaging part 112B formed at the rear end of the upper frame 11B. The recessed dimensions of the engaging part 195B and the engaging part 112B are preferably the same as the thickness of the engaging part 54B. By doing so, the engaging part 195B and the engaging part 54B, and the engaging part 112B and the engaging part 54B are engaged without unevenness, so that the turbulence of the air flow associated with the engagement of the members can be suppressed.

[0086] FIG. 25 is a schematic cross-sectional view of the rear portion of the cooking heater 100B according to the third embodiment. FIG. 25 shows a longitudinal cross-section along the front-rear direction passing through the frame inlet 16. The first rectifying means 19B is inserted between the ribs of the engaging part 134 formed by two ribs of the rear upper frame 13B. Similar to the first embodiment, the rear upper frame 13B is provided with an inclined surface 131, an upper surface recess 132, and an upper surface convex part 133B. When spillage occurs on the top plate part 1B, these prevent the liquid from entering the frame exhaust port 17B. The upper surface convex part 133B of the present embodiment has a shape that protrudes obliquely upward from the front to the rear, and is different in shape from the first and second embodiments, but they are the same in terms of the function of blocking the liquid.

[0087] In the air passage 30, in addition to the first rectifying means 19B, a second rectifying means 50B is provided. The second rectifying means 50B is disposed on the downstream side of the frame inlet 16 in the air passage 30. The air flowing into the air passage 30 from the frame inlet 16 is rectified by the first rectifying means 19B at a wide interval in the left-right direction, and on the downstream side thereof, it is rectified at a narrower interval by the rectifying portion 51B of the second rectifying means 50B. Therefore, according to the present embodiment, the degree of rectification of the air in the left-right direction can be increased.

[0088] The airflow rectified left and right is guided obliquely upward by the air guiding means provided on the downstream side of the second rectifying means 50B. In the present embodiment, as the air guiding means for guiding the air in the air passage 30 obliquely upward, an upper air guiding portion and a lower air guiding portion provided below the upper air guiding portion are provided. In the present embodiment, the air guiding surface 1313B of the rear upper frame 13B functions as the upper air guiding portion, and the inclined surface 142 of the rear lower frame 14 functions as the lower air guiding portion. The air guiding surface 1313B is on the downstream side of the air guiding surface 138 and is located on the downstream side of the second rectifying means 50B, and is an inclined surface rising from the frame inlet 16 side toward the frame exhaust port 17B side. With such an air guiding surface 1313B and the inclined surface 142, the cross-sectional area of the air passage 30 is reduced toward the frame exhaust port 17B.

[0089] Also in the present embodiment, the air passage 30 has a reduced cross-sectional area from the frame inlet 16 toward the frame exhaust port 17B and the center of the air passage 30 in the vertical direction rises. Thereby, the air flowing through the air passage 30 flows obliquely upward while increasing the wind speed. Therefore, the air flowing out from the frame exhaust port 17B becomes an upward airflow directed obliquely upward, and the above-described air curtain can be formed.

[0090] When spillage or the like occurs on the top plate portion 1B, the liquid that has overcome the inclined surface 131 and the upper surface recess 132 is blocked by the inclined surface of the upper surface convex portion 133B and guided forward. Therefore, it is possible to suppress the liquid from flowing into the air passage 30 from the frame exhaust port 17B. Further, the tip of the rear portion of the upper surface convex portion 133B is located behind the top portion 143 of the rear lower frame 14. For this reason, even if the liquid that has overcome the upper surface convex portion 133B falls downward from the tip of the upper surface convex portion 133B, the liquid falls onto the kitchen counter 200 behind the top portion 143 and does not easily flow onto the inclined surface 142. Therefore, it is possible to suppress the liquid that has fallen from the upper surface convex portion 133B from entering the air passage 30.

[0091] The structure and positional relationship of the drain wall 18, the substrate case 21, and the outlet 211 of the substrate case 21 are the same as those in the first embodiment, and the same operational effects as those in the first embodiment can be obtained. Although not shown in FIG. 25, the relationship h1 < h2 described in FIG. 10 is also adopted in the present embodiment, and the same effects as those in the first embodiment can be obtained.

[0092] Embodiment 4. In the present embodiment, a configuration example of the frame exhaust port 17C and the air guiding means different from those in the first to third embodiments will be described. In the present embodiment, the description will focus on the differences from the first to third embodiments, and the description of the common configurations will be appropriately omitted. In addition, for the configurations peculiar to the present embodiment, a subscript C will be added to the reference numerals.

[0093] FIG. 26 is a perspective view from the rear of the cooking heater 100C according to the fourth embodiment. The top plate portion 1C of the present embodiment includes a plate 10, an upper frame 11C, a lower frame 12 (see FIG. 27), a rear upper frame 13C, and a rear lower frame 14C. In the present embodiment, the rear lower frame 14C forms the side surface, that is, the rear surface, at the rear of the top plate portion 1, and a frame exhaust port 17C is provided in the rear surface of the rear lower frame 14C.

[0094] FIG. 27 is a perspective view from the front of the rear part of the cooking heater 100C according to Embodiment 4. Similar to Embodiment 1, the first rectifying means 19 is disposed between the rear upper frame 13C and the lower frame 12 in the vertical direction, and suppresses the lateral diffusion of the air from the frame inlet 16. The first rectifying means 19 is interposed between the rear upper frame 13C and the lower frame 12 to support the rear upper frame 13C from below, and can reduce the deformation or damage of the rear upper frame 13C when a load or impact is applied to the rear upper frame 13C.

[0095] The rear lower frame 14C is a long member extending in the left - right direction, and is a member having a U - shaped cross - section in which the upper surface, the rear surface, and the bottom surface are continuous. The rear lower frame 14C is made of, for example, a metal plate. The upper surface of the rear lower frame 14C is connected to the rear upper frame 13C, and the bottom surface is connected to the lower frame 12. In this way, at the rear part of the top plate portion 1C, the rear upper frame 13C, the rear lower frame 14C, and the lower frame 12 are integrated, so that the strength of this part can be increased. Thereby, the deformation of the lower frame 12 during the construction of the cooking heater 100C can be suppressed, and the damage or deformation of the rear upper frame 13C when a cooking container such as a pot collides can be reduced.

[0096] The lower surface of the rear upper frame 13C and the upper surface of the rear lower frame 14C can be adhered with a silicon resin or the like. Also, the bottom surface of the rear lower frame 14C and the upper surface of the lower frame 12 can be connected by spot welding. In addition, fastening means such as screws may be used to connect the members to each other.

[0097] A frame exhaust port 17C having a plurality of openings is provided in the rear surface portion of the rear lower frame 14C. The frame exhaust ports 17C are arranged in a row in the left - right direction of the rear lower frame 14C. The openings constituting the frame exhaust port 17C are preferably formed in a range including the upper side between the upper surface and the rear surface portion of the rear lower frame 14C and the lower side between the rear surface portion and the bottom surface. By doing so, the opening area of the frame exhaust port 17C is enlarged, so that the pressure loss associated with exhaust can be reduced.

[0098] FIG. 28 is an exploded perspective view of the rear portion of the top plate portion 1C according to the fourth embodiment. FIG. 28 shows a state in which the rear upper frame 13 is removed. In the present embodiment, a long lower air guiding member 60C extending in the left - right direction is provided on the lower frame 12. The lower air guiding member 60C is a member in which an inclined portion 61C (see FIGS. 29 and 30) and a bottom surface portion 62C (see FIGS. 29 and 30) are continuous and protrude. The lower air guiding member 60C is arranged such that the bottom surface portion 62C is placed on the lower frame 12 and the inclined portion 61C protrudes upward. The lower air guiding member 60C is formed, for example, by bending a metal plate and is connected to the lower frame 12 by spot welding or the like.

[0099] FIG. 29 is a partial plan view of the rear portion of the cooking heater 100C according to the fourth embodiment. FIG. 29 shows a state in which the rear upper frame 13C is removed. The first portion 191 of the first rectifying means 19 is overlapped on the bottom surface portion 62C of the lower air guiding member 60C. Although not shown, the second portion 192 is also overlapped on the bottom surface portion 62C. In this way, by pressing the lower air guiding member 60C from above with the first rectifying means 19, the lifting of the lower air guiding member 60C can be suppressed and the strength of the lower air guiding member 60C can be increased.

[0100] In FIG. 29, a portion between adjacent frame exhaust ports 17C of the rear lower frame 14C is shown as a partition 144C. The frame exhaust port 17C is formed by opening a part of the upper surface and the lower surface of the base material constituting the rear lower frame 14C. That is, the upper surface, the rear surface, and the portion between the rear surface and the bottom surface of the rear lower frame 14C are bent to form a so - called bending R shape at the corner, and this corner portion also opens as the frame exhaust port 17C (see FIG. 30). By doing so, the opening area of the frame exhaust port 17C can be increased by the thickness of the base material of the rear lower frame 14C, thereby reducing the passing wind speed of air and suppressing an increase in pressure loss.

[0101] FIG. 30 is a schematic cross-sectional view of the rear part of the cooking heater 100C according to Embodiment 4. FIG. 30 shows a longitudinal cross-section along the front-rear direction passing through the frame inlet 16. Also, in FIG. 30, the air flow is conceptually shown by dashed arrows. On the rear upper frame 13C, similar to Embodiment 1, an inclined surface 131, an upper surface recess 132, and an upper surface convex portion 133C are provided. These prevent liquid from entering the frame exhaust port 17C when spillage occurs on the top plate portion 1C. Note that the upper surface convex portion 133C of the present embodiment has a different shape from those of Embodiments 1 to 3, but they have the same function of blocking liquid.

[0102] The air passage 30C of the present embodiment is an air flow path from the second position 32 to the first position 31C. The first position 31C is at the apex of the lower air guiding member 60C. In the present embodiment, the space indicated as the first position 31C in FIG. 30 is the exhaust port of the air passage 30C. The air in the air passage 30C is guided obliquely upward by the air guiding means. In the present embodiment, as the air guiding means for guiding the air in the air passage 30C obliquely upward, an upper air guiding portion and a lower air guiding portion provided below the upper air guiding portion are provided. In the present embodiment, the air guiding surface 1314C of the rear upper frame 13C functions as the upper air guiding portion, and the inclined portion 61C of the lower air guiding member 60C functions as the lower air guiding portion. The air guiding surface 1314C is the lower surface of the rear upper frame 13C continuous with the air guiding surface 138 and is located on the upstream side of the inclined portion 61C, and is an inclined surface rising from the frame inlet 16 side toward the frame exhaust port 17C side. The inclined portion 61C is a wall protruding obliquely upward from the lower surface of the air passage 30C. Due to such an air guiding surface 1314C and the inclined portion 61C, the cross-sectional area of the air passage 30C is reduced at the position of the inclined portion 61C compared to its upstream side.

[0103] Also in this embodiment, the air passage 30C has a reduced cross-sectional area and the vertical center of the air passage 30C rises as it goes from the frame inlet 16 toward the first position 31C. As a result, the air flowing through the air passage 30C flows obliquely upward while increasing the wind speed. Therefore, the air exiting from the exhaust port at the position of the first position 31C becomes an upward airflow directed obliquely upward. There is an air passage formed in the rear lower frame 14C on the downstream side of the exhaust port at the position of the first position 31C, and the air flowing through the air passage flows obliquely upward and out to the outside from the frame exhaust port 17C, and the above-described air curtain can be formed.

[0104] In this embodiment, the rear upper frame 13C constituting the upper air guiding portion and the lower air guiding member 60C constituting the lower air guiding portion are formed of separate members, and a rear lower frame 14C is provided as a connecting member for connecting the rear upper frame 13C and the lower air guiding member 60C. By connecting the rear upper frame 13C and the lower air guiding member 60C with the rear lower frame 14C, the strength at the rear of the top plate portion 1C can be increased, so that deformation or damage of the top plate portion 1C when colliding with other members can be reduced. And, a frame exhaust port 17C is formed in the rear lower frame 14C as an opening for allowing the air flowing out from the exhaust port to pass through. For this reason, the liquid that has flowed in from the rear toward the lower air guiding member 60C side and has been blocked by the lower air guiding member 60C can be discharged to the outside from the frame exhaust port 17C.

[0105] The air passage 30C is provided with first rectifying means 19, and the air flowing into the air passage 30C from the frame inlet 16 is suppressed from diffusing in the left-right direction and flows along the front-rear direction. By rectifying the air in the left-right direction, most of the air flowing out from the frame exhaust port 17C can be utilized as an air curtain, so that the air curtain can be efficiently formed.

[0106] Also, in the present embodiment, the height dimension h2C from the lower end of the top plate portion 1C to the lower end of the exhaust port (the position of reference numeral 31C in FIG. 30) is larger than the height dimension h1C from the upper end of the top plate portion 1C to the upper end of the exhaust port. Similar to what was described in Embodiment 1, by setting the height position of the exhaust port in the top plate portion 1C such that dimension h1C < dimension h2C, even when there are restrictions on the height dimension of the top plate portion 1C, the position of the exhaust port can be raised, and the intrusion of liquid into the exhaust port can be suppressed. In order to suppress the intrusion of the liquid flowing on the kitchen counter 200 into the frame exhaust port, considering the surface tension of water, dimension h2 is preferably 3 mm or more, more preferably 4.5 mm or more.

[0107] When spillage or the like occurs on the top plate portion 1C, the liquid that has overcome the inclined surface 131 and the upper surface concave portion 132 is blocked by the upper surface convex portion 133C and guided forward. Therefore, it is possible to suppress the liquid from flowing into the air passage 30C from the frame exhaust port 17C. Further, the tip of the rear portion of the upper surface convex portion 133C is located behind the top of the inclined portion 61C of the lower air guiding member 60C. For this reason, even if the liquid that has overcome the upper surface convex portion 133C falls downward from the tip of the upper surface convex portion 133C, the liquid is blocked by the surface on the rear portion side of the inclined portion 61C, so that it is possible to suppress the liquid from entering the air passage 30C from the exhaust port.

[0108] The structure and positional relationship of the drain wall 18, the substrate case 21, and the outlet 211 of the substrate case 21 are the same as those in Embodiment 1, and the same operational effects as those in Embodiment 1 can be obtained.

[0109] Further, in the present embodiment, the front end of the bottom surface of the rear lower frame 14C is in contact with the outer corner portion of the bottom surface portion 62C and the inclined portion 61C of the lower air guiding member 60C. With such a configuration, the forward movement of the rear lower frame 14C is restricted by the lower air guiding member 60C. Thereby, even when the rear lower frame 14C comes into contact with the kitchen counter 200 or the like during the installation of the cooking heater 100C, displacement of the rear lower frame 14C can be suppressed, and a decrease in the design property of the cooking heater 100C can be suppressed. Further, even when a torsional load occurs at the rear portion of the rear lower frame 14C during the installation of the cooking heater 100C or the like, since the rear lower frame 14C is supported by the lower air guiding member 60C, the load is dispersed, and deformation of the rear lower frame 14C can be suppressed.

[0110] Note that, although an example in which the lower air guiding member 60C is configured as a member separate from the lower frame 12 and connected to the lower frame 12 has been shown, a part of the lower frame 12 may be processed to form the lower air guiding member 60C. For example, the lower frame 12 may be composed of two metal plates stacked vertically, and the upper metal plate may be bent to form a convex shape protruding upward, and this may be used as the lower air guiding member 60C. By doing so, the strength of the lower frame 12 can be increased, and the assembly effort can be reduced.

[0111] A part of the structures described in Embodiments 1 to 4 can be combined with other embodiments. For example, a recess corresponding to the recess 1312A described in Embodiment 2 may be provided upstream of the frame exhaust ports 17, 17B, or 17C of other embodiments, and by doing so, intrusion of liquid into the housing 2 can be suppressed.

[0112] In Embodiments 1 to 4, an example was shown in which exhaust ports opening rearward were provided in the top plate portions 1 to 1C. However, instead of or in addition to the rearward direction, for example, exhaust ports opening toward a side other than the rear, such as the left or right side, and air guiding means for guiding air to the exhaust ports may be provided. FIG. 31 is a perspective view from the rear of a cooking heater 100D according to a modification of Embodiments 1 to 4. In FIG. 31, in the configuration shown in FIG. 2, an example is illustrated in which an exhaust port 17D opening toward the right side is provided. By providing the air guiding means described in Embodiments 1 to 4 to the exhaust port 17D opening toward a side other than the rear as in the example of FIG. 31, it is possible to suppress the adhesion of water vapor or oil fumes from the pot placed on the top plate portion 1 to the wall or diffusion into the room.

[0113] Hereinafter, aspects of the present disclosure will be appended.

[0114] [Appendix 1] A top plate portion on which a pot is placed, A housing provided under the top plate portion, An exhaust port provided in the top plate portion and opening toward a side, for discharging air in the housing, The top plate portion has an air passage connecting an inlet communicating with the inside of the housing and the exhaust port, In the air passage, An upper air guiding portion and a lower air guiding portion provided below the upper air guiding portion, and air guiding means provided upstream of the exhaust port for guiding air obliquely upward toward the exhaust port, The vertical dimension of a first position, which is the end on the exhaust port side in the air passage, is smaller than the vertical dimension of a second position upstream of the air guiding means in the air passage, The center in the vertical direction of the first position is above the center in the vertical direction of the second position Cooking heater. [Appendix 2] The height dimension from the lower end of the top plate portion to the lower end of the exhaust port is larger than the height dimension from the upper end of the top plate portion to the upper end of the exhaust port The cooking heater according to Appendix 1. [Appendix 3] The lower air guiding part includes a recessed part recessed downward. The cooking heater according to appended note 1 or appended note 2. [Appended note 4] The upper air guiding part and the lower air guiding part are constituted by separate members, On the downstream side of the exhaust port, a connecting member is provided which connects the upper air guiding part and the lower air guiding part and has an opening through which the air flowing out from the exhaust port passes. The cooking heater according to any one of appended notes 1 to 3. [Appended note 5] The upper air guiding part and the lower air guiding part are constituted by an integral member, The inlet includes a plurality of inlets, A connecting part that connects the member constituting the upper air guiding part and the lower air guiding part and the member forming the inlet is disposed between adjacent inlets among the plurality of inlets. The cooking heater according to any one of appended notes 1 to 4. [Appended note 6] The upper air guiding part and the lower air guiding part are constituted by separate members, The upper air guiding part and the lower air guiding part are connected to a lower frame that constitutes at least a part of the lower surface of the top plate part, and the upper air guiding part and the lower air guiding part are not directly connected to each other. The cooking heater according to any one of appended notes 1 to 5. [Appended note 7] At an end of the upper surface of the top plate part on the exhaust port side, it is provided with an upper protruding upper surface convex part extending along the width direction of the exhaust port. The cooking heater according to any one of appended notes 1 to 6. [Appended note 8] On the upper surface of the top plate part on the exhaust port side, it is provided with a downward recessed upper surface recessed part formed along the end of the top plate part on the exhaust port side. The cooking heater according to any one of appended notes 1 to 7. [Appended note 9] On the upper surface of the top plate part, an inclined surface descending from the exhaust port side toward the center of the top plate part is provided. The cooking appliance according to any one of Supplementary Notes 1 to 8. [Supplementary Note 10] At the end forming the exhaust port of the upper air guiding part, provided with a lower surface convex part protruding downward The cooking appliance according to any one of Supplementary Notes 1 to 9. [Supplementary Note 11] On the lower surface of the upper air guiding part, a lower surface concave part recessed upward is provided The cooking appliance according to Supplementary Note 10. [Supplementary Note 12] The lower air guiding part has an inclined surface rising along the flow of the air, The apex of the lower surface convex part is located on the downstream side of the apex of the inclined surface with respect to the flow of the air The cooking appliance according to Supplementary Note 10 or 11. [Supplementary Note 13] The inlet includes a plurality of inlets, Among the plurality of inlets, between adjacent inlets, provided with first rectifying means having a surface extending in the vertical direction, and the upper end and the lower end of the surface are in contact with the upper surface and the lower surface of the air passage The cooking appliance according to any one of Supplementary Notes 1 to 12. [Supplementary Note 14] The first rectifying means is sandwiched between a member constituting the upper surface of the air passage and a member constituting the lower surface of the air passage The cooking appliance according to Supplementary Note 13. [Supplementary Note 15] In the first rectifying means, a through hole into which a screw or a bolt for fastening the member constituting the upper surface of the air passage and the member constituting the lower surface of the air passage is inserted is formed The cooking appliance according to Supplementary Note 14. [Supplementary Note 16] Provided with second rectifying means having a first surface extending along the vertical direction and partitioning the downstream region of the first rectifying means into a plurality of regions The cooking appliance according to Supplementary Note 13 or 14. [Supplementary Note 17] The second rectifying means, having the first surface, a second surface that is continuous with the first surface and contacts the upper surface of the air passage, a third surface that is continuous with the second surface and extends along the vertical direction, and a fourth surface that is continuous with the third surface and contacts the lower surface of the air passage The cooking heater according to Supplementary Note 16. [Supplementary Note 18] A drain wall extending downward is provided at the edge of the inlet. The cooking heater according to any one of Supplementary Notes 1 to 17.

Explanation of Signs

[0115] 1 Top plate part, 1A Top plate part, 1B Top plate part, 1C Top plate part, 2 Housing, 3 Display part, 4 Operation part, 5 Heating port, 6 Drain port, 7 Housing air intake port, 10 Plate, 11 Upper frame, 11A Upper frame, 11B Upper frame, 11C Upper frame, 12 Lower frame, 12A Lower frame, 13 Rear upper frame, 13A Rear upper frame, 13B Rear upper frame, 13C Rear upper frame, 14 Rear lower frame, 14C Rear lower frame, 15 Seal member, 16 Frame inlet, 17 Frame exhaust port, 17A Frame exhaust port, 17B Frame exhaust port, 17C Frame exhaust port, 17D Frame exhaust port, 18 Drainage wall, 19 First rectifying means, 19A First rectifying means, 19B First rectifying means, 20 Heating coil, 21 Substrate case, 22 Heat dissipation fins, 24 Cooling duct, 25 Cooling air outlet, 26 Blowing means, 27 Drive circuit board, 30 Air passage, 30C Air passage, 31 First position, 31C First position, 31P Center, 32 Second position, 32P Center, 40A Fastening member, 50B Second rectifying means, 51B Rectifying part, 52B First frame installation surface, 53B Second frame installation surface, 54B Engaging part, 60C Lower air guiding member, 61C Inclined part, 62C Bottom surface part, 100 Heating cooker, 100A Heating cooker, 100B Heating cooker, 100C Heating cooker, 100D Heating cooker, 111 Engaging part, 112B Engaging part, 121 Engaging part, 122A Through hole, 131 Inclined surface, 132 Upper surface recess, 133 Upper surface protrusion, 133B Upper surface protrusion, 133C Upper surface protrusion, 134 Engaging part, 135 Rectifying means engaging part, 136 Lower surface recess, 137 Lower surface protrusion, 138 Air guiding surface, 139A Engaging part, 141 Engaging part, 142 Inclined surface, 143 Top part, 144C Partition, 191 First part, 192 Second part, 193 Third part, 194A Through hole, 195B Engaging part, 200 Kitchen counter, 201 Kitchen wall, 202 Storage, 211 Outlet, 1310A First wall, 1311A Second wall, 1312A Recess, 1313B Air guiding surface, 1314C Air guiding surface.

Claims

1. A top plate portion on which a pot is placed; A housing provided under the top plate portion; an exhaust port that is provided in the top plate portion and opens toward a side, and through which air within the housing flows out; the top plate portion has an air passage connecting an inlet communicating with the inside of the housing and the exhaust port, The air passage includes: a wind guidance means having an upper wind guidance section and a lower wind guidance section provided below the upper wind guidance section, the wind guidance means being provided upstream of the exhaust port and guiding air obliquely upward toward the exhaust port; a vertical dimension of a first position, which is an end of the air passage on the exhaust port side, is smaller than a vertical dimension of a second position, which is an end of the air passage on the upstream side of the air guide means, The center of the first position in the vertical direction is above the center of the second position in the vertical direction. Heating cooker.

2. A height dimension from a lower end of the top plate portion to a lower end of the exhaust port is greater than a height dimension from an upper end of the top plate portion to an upper end of the exhaust port. The cooking device according to claim 1.

3. The lower air guide section has a recess recessed downward. The cooking device according to claim 1 or 2.

4. The upper air guide section and the lower air guide section are configured as separate members, A connecting member is provided downstream of the exhaust port, the connecting member connecting the upper air guide section and the lower air guide section and having an opening through which air flowing out of the exhaust port passes. The cooking device according to claim 1 or 2.

5. The upper air guide section and the lower air guide section are formed as an integral member, The inlet includes a plurality of inlets, A connection portion that connects the members constituting the upper airflow guidance portion and the lower airflow guidance portion to a member forming the inlet is disposed between adjacent inlets among the plurality of inlets. The cooking device according to claim 1 or 2.

6. The upper air guide section and the lower air guide section are configured as separate members, The upper air guide section and the lower air guide section are connected to a lower frame that constitutes at least a part of the lower surface of the top plate section, and the upper air guide section and the lower air guide section are not directly connected to each other. The cooking device according to claim 1 or 2.

7. The top plate portion has an upper surface protrusion at an end portion of the upper surface on the exhaust port side, the upper surface protruding upward and extending along the width direction of the exhaust port. The cooking device according to claim 1 or 2.

8. A top surface recess is formed on the top surface of the top plate portion on the exhaust port side, the top surface recess being recessed downward along the end portion of the top plate portion on the exhaust port side. The cooking device according to claim 1 or 2.

9. The top surface of the top plate is provided with an inclined surface that descends from the exhaust port side toward the center of the top plate. The cooking device according to claim 1 or 2.

10. The upper air guide portion has an end portion that forms the exhaust port and a lower surface protrusion that protrudes downward. The cooking device according to claim 1 or 2.

11. The upper air guide section has a lower surface recessed portion that is recessed upward. The cooking device according to claim 10.

12. The lower airflow guidance section has an inclined surface that rises along the air flow, The apex of the lower surface convex portion is located downstream of the apex of the inclined surface in the air flow direction. The cooking device according to claim 10.

13. The inlet includes a plurality of inlets, A first straightening means is provided between adjacent inlets among the plurality of inlets, the first straightening means having a surface extending in the vertical direction, and the upper and lower ends of the surface being in contact with the upper and lower surfaces of the air passage. The cooking device according to claim 1 or 2.

14. The first rectifying means is sandwiched between a member constituting an upper surface of the air passage and a member constituting a lower surface of the air passage. The cooking device according to claim 13.

15. The first straightening means is formed with a through hole through which a screw or a bolt is inserted to fasten a member constituting an upper surface of the air passage and a member constituting a lower surface of the air passage. The cooking device according to claim 14.

16. A second flow straightening means having a first surface extending along the vertical direction and dividing an area downstream of the first flow straightening means into a plurality of areas. The cooking device according to claim 13.

17. The second rectification means is The air passage has a first surface, a second surface connected to the first surface and in contact with an upper surface of the air passage, a third surface connected to the second surface and extending along a vertical direction, and a fourth surface connected to the third surface and in contact with a lower surface of the air passage. The cooking device according to claim 16.

18. The edge of the inlet is provided with a water cutting wall extending downward. The cooking device according to claim 1 or 2.

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