Heating Regulator

Abstract

To provide a cooking appliance that can suppress damage to functional components caused by radiant heat from the heating means. [Solution] By heating with the heating means 2, a cooling passage 6 is formed inside the case body 3, which has a first passage section 61 having an intake port 65 that can take in cooling air from outside the cooling passage 6, a second passage section 62 that is in communication with the first passage section 61 and into which the cooling air taken in from the first passage section 61 flows and into which the functional component C is housed, and a third passage section 63 that is in communication with the second passage section 62 and into which the cooling air that has flowed into the second passage section 62 flows and into which the cooling air can be exhausted to the outside of the case body 3.

Description

Technical Field

[0001] The present invention relates to a cooking heater. In particular, the present invention relates to an improvement for suppressing damage to functional components disposed within a case body.

Background Art

[0002] As a heating means, there is a cooking heater having a gas burner that protrudes from within a case body onto a top plate portion to heat an object to be heated on the top plate portion. In this type of cooking heater, below the gas burner within the case body, various functional components such as an ignition device like an igniter, a gas flow control device such as a control valve, a display device such as a liquid crystal device, and a control board for controlling the operation of these devices are disposed (for example, Patent Document 1). These functional components may be damaged by radiant heat from the heating means within the case body. Therefore, it has been proposed to provide a cooling fan within the case body and cool the functional components by the cooling fan during heating by the heating means (for example, Patent Document 2).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, even if a cooling fan is provided, if the cooling fan malfunctions, the functional components will no longer be cooled. Also, in heating cookers powered by batteries, if the battery capacity decreases, the cooling fan may not operate properly, and the functional components will not be adequately cooled. For this reason, it is conceivable to provide an opening in the case body to exhaust the heated air inside the case body to the outside without providing a cooling fan, but simply providing an opening makes it difficult for the air inside the case body to be exhausted through the opening. In particular, unlike premixed gas burners that burn a mixed gas of hydrocarbon fuel gas such as LP gas or natural gas mixed with primary air, when a diffusion combustion gas burner that burns fuel gas that does not require primary air for combustion, such as hydrogen gas, is used, it is difficult for air to flow inside the case body during combustion, so air tends to stagnate inside the case body, causing the temperature inside the case body to rise and making the functional components susceptible to damage.

[0005] The present invention solves the above problems, and the object of the present invention is to provide a cooking appliance that can suppress damage to functional components disposed inside the case body. [Means for solving the problem]

[0006] According to a first aspect of this technology, A case body having an outer perimeter wall that is erected vertically and opening upwards, The top panel covers the case body from above, A heating means is provided, at least in part, inside the case body, Functional components located inside the case body, A cooking appliance having a cooling passage formed inside the case body through which cooling air for cooling functional components flows, The cooling passage is A first passage section having an air intake that can take in cooling air from outside the cooling passage by heating by a heating means, It is connected to the first passage section, and cooling air taken into the first passage section flows in from the first passage section to the second passage section where functional components are housed. It comprises a third passage section that communicates with the second passage section, into which cooling air that has flowed into the second passage section flows, and which has an exhaust port that allows the cooling air to be exhausted to the outside of the case body, The air intake for the first passage opens at the lower part of the case body. The exhaust port of the third passage is provided as an opening in the upper part of the outer wall of the case body or between the upper part of the outer wall of the case body and the top plate.

[0007] According to the first embodiment described above, when heating is performed by the heating means, the temperature of the upper part inside the case body rises due to the radiant heat from the heating means, and consequently, the temperature of the air in the upper part of the third passage, which has an exhaust port opening between the upper part of the outer wall of the case body and the top plate, also rises. As a result, the temperature of the air in the upper part of the third passage becomes higher than the temperature of the air in the lower part of the third passage, the temperature of the air in the second passage that communicates with the third passage, and the temperature of the air in the first passage that communicates with the third passage via the second passage. This creates a temperature difference between the upper and lower parts of the cooling passage, and a chimney effect occurs in which the air in the lower part of the cooling passage moves upward. As a result, low-temperature cooling air near the intake port opening at the lower part of the case body is drawn into the first passage through the intake port. Furthermore, since the first passage communicates with the third passage via the second passage, the low-temperature cooling air drawn into the first passage flows into the third passage through the second passage where the functional components are housed. Furthermore, since the third passage is connected to the exhaust vent at the top of the case body, the air flowing into the third passage is exhausted to the outside of the case body through the exhaust vent. As a result, the functional components housed in the second passage can be cooled by the cooling air circulating through the cooling passage formed inside the case body, and damage to the functional components can be suppressed without the need for a cooling fan.

[0008] According to a second aspect of this technology, in the first embodiment described above, The cooling passage wall constituting the third passage section includes an exhaust outer wall portion of the outer wall of the case body where the exhaust port is located, and an opposing wall that faces the exhaust outer wall portion on the inner side of the case body with a gap between them. The opposing walls inside the case body have a communication opening that allows air from inside the case body to flow into the third passage when heated by a heating means.

[0009] According to the second embodiment described above, the high-temperature air inside the case body, heated by radiant heat from the heating means, flows into the third passage through the communication port, thereby increasing the temperature of the air in the upper part of the third passage and promoting the chimney effect. As a result, cooling air is more easily drawn into the first passage and circulates more freely in the second passage, further reducing damage to functional components.

[0010] According to a third aspect of this technology, in the second aspect described above, The communication opening between opposing walls inside the case body is formed at the top of the opposing wall.

[0011] According to the third embodiment described above, the high-temperature air inside the case body flowing into the third passage through the communication port can raise the temperature of the air in the upper part of the third passage, thereby further promoting the chimney effect.

[0012] According to a fourth aspect of this technology, in any one of the first to third aspects described above, The second passage section and the third passage section are connected such that the second passage section communicates with the third passage section from the side. The cooling passage wall constituting the second passage section has an upper wall that covers the functional components from above. The upper wall constituting the second passageway slopes upward toward the third passageway.

[0013] According to the fourth embodiment described above, when cooling air flows through the second passage, the heated cooling air is more likely to flow into the third passage along the inner surface of the upper wall constituting the second passage. As a result, even if the second passage is formed to communicate with the third passage from the side and the second passage extends horizontally, cooling air can be smoothly circulated within the cooling passage.

[0014] According to the fifth aspect of the present technology, in any one of the first to fourth aspects described above, The top plate portion has a facing hanging wall portion that hangs downward from the peripheral edge of the top plate portion and faces the exhaust outer peripheral wall portion of the case body where the exhaust port is located with a gap therebetween. The lower edge of the facing hanging wall portion is located below the lower edge of the opening of the exhaust port.

[0015] According to the fifth aspect described above, since the exhaust port can be concealed by the facing hanging wall portion from the outside of the cooking appliance, the designability can be improved. Further, it is possible to suppress the intrusion of the spilled cooking liquid into the exhaust port that is transmitted from the upper surface of the top plate portion to the facing hanging wall portion.

[0016] According to the sixth aspect of the present technology, in any one of the first to fifth aspects described above, The intake port of the first passage portion opens at a lower position of the case body and faces sideways or downward.

[0017] According to the sixth aspect described above, the low-temperature air at the lower position of the case body can be taken into the first passage portion from the intake port as cooling air.

[0018] According to the seventh aspect of the present technology, in any one of the first to sixth aspects described above, The functional component uses a battery as a driving power source.

[0019] According to the first to sixth aspects described above, since damage to the functional component can be suppressed without using a cooling fan with high power consumption, the battery life can be extended even when the battery is used as a driving power source.

[0020] According to the eighth aspect of the present technology, in any one of the first to seventh aspects described above, The heating means comprises a diffusion combustion type gas burner.

[0021] According to the eighth embodiment described above, even in a cooking appliance having a heating means consisting of a diffusion combustion type gas burner that does not require primary air for combustion and in which air tends to stagnate within the case body, damage to functional components can be suppressed without providing a cooling fan.

[0022] According to the ninth aspect of this technology, in any one of the first to eighth aspects described above, The case has a heat shield above the functional components inside the case body, which covers the heating means from below. The heat shield has an opening that faces the exhaust vent.

[0023] According to the ninth embodiment described above, since the heat shield covers the area below the gas burner, radiant heat from the gas burner into the case body can be reduced. Furthermore, since the heat shield has an opening that opens toward the exhaust port, the high-temperature air inside the heat shield covering the area below the gas burner can easily flow toward the exhaust port, further increasing the temperature of the air in the upper part of the third passage and promoting the chimney effect. This further reduces damage to functional components.

[0024] According to the tenth aspect of this technology, in any one of the second to ninth aspects described above, The cooling passage walls constituting the first and second passage sections are formed by housing cases that accommodate functional components and have openings that open toward the third passage section. The opposing wall inside the case body has a connection port that opens toward the second passage section. The second and third passages are connected by the opening of the storage case and the connection port of the opposing wall. Let it through.

[0025] According to the tenth embodiment described above, the low-temperature cooling air taken into the first passage within the housing case can be efficiently circulated to the second passage where the functional components are housed. Furthermore, the air circulating in the second passage can be smoothly transferred to the third passage. This further reduces damage to the functional components. [Brief explanation of the drawing]

[0026] [Figure 1] Figure 1 is a schematic perspective view showing a gas stove according to an embodiment of the present invention. [Figure 2] Figure 2 is a schematic perspective view of the main parts of a gas stove according to an embodiment of the present invention, showing the top plate removed. [Figure 3] Figure 3 is a schematic perspective view showing the rear portion of a gas stove according to an embodiment of the present invention. [Figure 4] Figure 4 is a schematic longitudinal cross-sectional view of the main part showing the rear portion of a gas stove according to an embodiment of the present invention. [Modes for carrying out the invention]

[0027] The following describes a heating appliance according to an embodiment of the present invention applied to a table-type gas stove, with reference to the drawings. Note that the present invention can also be applied to a built-in gas stove.

[0028] Figure 1 is a schematic perspective view showing a gas stove according to this embodiment, and Figure 2 is a schematic perspective view showing the gas stove with the top plate removed. As shown in Figures 1 and 2, the gas stove 1 is a so-called two-burner table gas stove having two gas burners 2. The gas stove 1 has a case body 3 that opens upwards and downwards, and a top plate 9 that covers the case body 3 from above. In this specification, the side of the gas stove 1 that the user faces is referred to as the front side, and the depth direction of the gas stove 1 when viewed from the front side is referred to as the front-to-back direction, the width direction as the left-to-right direction, and the height direction as the up-and-down direction.

[0029] The case body 3 has a front wall 31, a rear wall 32, a left wall 33, and a right wall 34 as outer peripheral walls that are vertically positioned. The upper ends of the front wall 31, rear wall 32, left wall 33, and right wall 34 of the case body 3 have inwardly folded front flange portions 31a, 32a, 33a, and 34a, respectively. An ignition / extinguishing operation switch 20 for ignition / extinguishing and adjusting the flame intensity of each gas burner 2 is provided on the outer surface of the front wall 31 of the case body 3. Although not shown, a battery, which is the power source, is housed at the left end of the front wall 31 inside the case body 3. A trivet 99 for placing cooking utensils is provided around the outer circumference of the gas burner 2 on the top plate 9. Since the configuration of the gas burner 2, case body 3, top plate 9, etc. is the same on both the left and right sides, the configuration of the left side will be mainly described below, and the same reference numbers will be used to omit the explanation of configurations common to both sides.

[0030] Figure 3 is a schematic perspective view of the rear portion of the gas stove 1, and Figure 4 is a schematic longitudinal cross-sectional view of the rear portion of the gas stove 1. In Figure 3, the top plate 9 and trivet 99 are omitted to avoid complexity. As shown in Figures 3 and 4, the gas burner 2 comprises a burner body 21 that rises from the downstream end of the gas inlet pipe L located inside the case body 3 toward a burner opening 91 in the drip tray 92 of the top plate 9, a burner head 22 placed on the burner body 21, and a cover plate 23 placed on the burner head 22. Although not shown, the upstream end of the gas inlet pipe L is connected to the gas outlet of the casing of the fuel gas valve unit. A gas nozzle for injecting fuel gas is provided at the downstream end of the valve unit communicating with the gas outlet. Fuel gas (e.g., hydrogen gas) that does not contain primary air is supplied to the gas inlet pipe L. The fuel gas ejected from the flame hole 24 is ignited. This causes the fuel gas to undergo diffusion combustion. Furthermore, when hydrogen gas is used as the fuel gas, it may contain small amounts of additives for odorization or other purposes.

[0031] A port portion 21a is provided projecting forward from the front end of the lower part of the burner body 21. The downstream end of the gas inlet pipe L is connected to the port portion 21a. The burner body 21 has an annular distribution chamber 21b into which fuel gas from the gas inlet pipe L flows. The burner head 22 has a plurality of flame holes 24 opening on the outer surface of the burner head 22 and a distribution passage 22b that distributes fuel gas from the distribution chamber 21b to these flame holes 24.

[0032] The burner head 22 has a lower member 22L that contacts the burner body 21 and an upper member 22U that rests on the lower member 22L. These two members 22L and 22U are fastened together at multiple points with short screws. The burner head 22 is also fastened to the burner body 21 at multiple points with long screws. The burner body 21 has a pair of mounting pieces that extend outward in the left-right direction from both ends.

[0033] The lower surface of the burner body 21 has an inclined surface that slopes upward toward the rear from the port portion 21a at the front end to the center of the burner body 21 in the front-rear direction, and a horizontal surface that extends substantially horizontally toward the rear from the rear end of the inclined surface. An ignition electrode 27 and a thermocouple (not shown) are attached to the outer circumference of the gas burner 2.

[0034] An opposing wall 35 is provided between the gas burner 2 and the rear wall 32 inside the case body 3. The opposing wall 35 is located on the inner side of the case body 3, and is positioned at a predetermined distance from the rear wall 32 in the front-rear direction, facing substantially the entire rear wall 32. The opposing wall 35 may be divided into two or more sections. An inner upper flange portion 35a and an inner lower flange portion 35b are formed at the upper and lower ends of the opposing wall 35, respectively, which are bent forward. The opposing wall 35 is fixed in a predetermined position inside the case body 3 by fastening the rear flange portion 32a and the inner upper flange portion 35a at predetermined locations, and fastening the inner lower flange portion 35b to a lower frame provided at the bottom of the case body 3 (not shown). Multiple rectangular upper openings 36a are provided at the upper part of the opposing wall 35, and multiple rectangular lower openings 36b are provided at the lower part of the opposing wall 35.

[0035] Inside the case body 3, a rear support wall 40 is formed that protrudes forward from the left-right center of the opposing wall 35 to the front-rear center of the case body 3 (see Figure 2). In addition, a strip-shaped portion 41 is installed between the left wall 33 and the rear support wall 40, extending in the left-right direction and passing below the rear portion of the left gas burner 2. The configuration on the right side is similar. The strip-shaped portion 41 has a rectangular upper surface portion 41a, a front piece 41b extending downward from the front end of the upper surface portion 41a, and a rear piece 41c extending downward from the rear end of the upper surface portion 41a. The strip-shaped portion 41 is open downwards. Although not shown, a locking piece is formed at the left end of the upper surface portion 41a of the strip-shaped portion 41 to lock onto the left wall 33, and a locking claw 41d is formed at the right end of the upper surface portion 41a of the strip-shaped portion 41 to lock onto the rear support wall 40. The gas burner 2 is fixed in a predetermined position within the case body 3 by placing the horizontal surface of the rear portion of the burner body 21 of the gas burner 2 on the upper surface 41a of the strip-shaped portion 41, and fastening a pair of mounting pieces that protrude outward in the left-right direction from the burner body 21 to the upper surface 41a of the strip-shaped portion 41 with screws. Therefore, the strip-shaped portion 41 constitutes a holding member that holds the gas burner 2 within the case body 3. Through holes for inserting ignition electrodes 27 and thermocouples are provided in the upper surface 41a of the strip-shaped portion 41. The strip-shaped portion 41 is made of, for example, an iron material. The left and right strip-shaped portions 41 may be formed from a single part, or from three or more parts.

[0036] A top plate support base 48 extending in the front-to-back direction is installed between the left-to-right center of the front flange portion 31a formed at the upper end of the front wall 31 of the case body 3 and the rear support wall 40. When the top plate portion 9 is positioned above the case body 3, the peripheral edge of the top plate portion 9 is in contact with the front flange portion 31a and The left and right flange portions 33a and 34a support the top plate portion 9 from below, and the left-right central portion of the top plate portion 9 is supported from below by the top plate support base 48. The top plate support base 48 is made of, for example, an iron component.

[0037] A rectangular, flat connecting section 49, extending in the left-right direction, is installed between the left-right wall 33, which is in front of the left gas burner 2, and the top plate support base 48. The configuration on the right side is similar. The connecting section 49 supports the drip tray 92, which has a burner opening 91 for the gas burner 2, from below. As a result, when the upper opening of the case body 3 is covered by the top plate section 9 on which the drip tray 92 is placed, the burner head 22 and cover plate 23 of the gas burner 2 protrude from the burner opening 91 above the top plate section 9. In addition, the burner body 21 of the gas burner 2 is positioned in the upper part inside the case body 3.

[0038] A heat shield cover portion 42 is provided below the burner body 21 of the gas burner 2. The heat shield cover portion 42 is made of, for example, an aluminum or copper material with higher thermal conductivity than the strip portion 41. The heat shield cover portion 42 has a rectangular flat cover bottom wall portion 42a that extends rearward toward the opening 37 of the rear side wall 32 of the case body 3, which will be described later, from a position facing the port portion 21a at the front end of the burner body 21 of the gas burner 2 to a position facing the rear end of the strip portion 41, beyond the rear end of the burner body 21. The cover bottom wall portion 42a is wider in the left-right direction than the burner body 21. For this reason, the cover bottom wall portion 42a faces the lower surface of the burner body 21 at a predetermined distance apart in the vertical direction. Furthermore, the heat shield cover portion 42 has a left side wall portion (first side wall portion) 42b extending upward from the left end of the cover bottom wall portion 42a, a right side wall portion (second side wall portion) 42c extending upward from the right end of the cover bottom wall portion 42a, and a front wall portion 42d extending upward from the front end of the cover bottom wall portion 42a. The heat shield cover portion 42 is open to the top and rear. The left and right side walls 42b and 42c of the cover are formed in a roughly L-shape such that the front portion is higher than the rear portion. The strip-shaped portion 41 fits into the stepped portion of these left and right side walls 42b and 42c of the cover. In addition, the front wall portion 42d of the cover has a U-shaped notch into which the port portion 21a at the front end of the burner body 21 is inserted. Therefore, when the heat shield cover portion 42 and the strip portion 41 are positioned below the gas burner 2, the burner body 21 of the gas burner 2 inside the case body 3 is covered from below by the box formed by the heat shield cover portion 42 and the strip portion 41. As a result, when heating is performed by the gas burner 2, the transfer of radiant heat from the burner body 21 to the inside of the case body 3 is suppressed by the heat shield cover portion 42 and the strip portion 41. Thus, the heat shield cover portion 42 and the strip portion 41 constitute the heat shield portion 4. Furthermore, the heat shield cover portion 42, which covers the entire lower part of the burner body 21 of the gas burner 2, constitutes the main heat shield portion. In addition, below the rear portion of the burner body 21, the cover bottom wall portion 42a of the heat shield cover portion 42 and the upper surface portion 41a of the strip portion 41 are positioned overlapping in the vertical direction. Therefore, the strip portion 41 positioned below the rear portion of the burner body 21 constitutes the secondary heat shield portion.Furthermore, the rear end of the cover bottom wall portion 42a of the heat shield cover portion 42 and the rear piece 41c of the strip-shaped portion 41 are separated by a predetermined distance in the vertical direction. For this reason, the heat shield portion 4 has an opening (first opening) 43 that opens toward the rear. Note that the heat shield cover portion 42 and the strip-shaped portion 41 may be formed from a single part, or they may be formed from three or more parts.

[0039] Between the bottom wall portion 42a and the front wall portion 42d of the heat shield cover portion 42, there is a front end opening (second opening) 44 that opens downward. In addition, an insertion hole for inserting the ignition electrode 27 or thermocouple is provided in the rear portion of the bottom wall portion 42a of the cover. Furthermore, the bottom wall portion 42a of the cover is formed to be inclined upward toward the rear. The inclination angle of this bottom wall portion 42a of the cover is smaller than the inclination angle of the inclined surface of the lower surface of the front portion of the burner body 21 as described above. Moreover, when the heat shield cover portion 42 is disposed below the burner body 21 of the gas burner 2, the bottom wall portion 42a of the cover is formed such that the distance between the lower surface of the rear end of the burner body 21 and the upper surface of the bottom wall portion 42a that is vertically opposite to it is greater than the distance between the lower surface of the front end of the burner body 21 and the upper surface of the bottom wall portion 42a that is vertically opposite to it. Furthermore, the bottom wall portion 42a of the cover is inclined upward toward the rear, at least at the rear end. It is sufficient if it has an inclined section.

[0040] The left side wall portion 42b and the right side wall portion 42c of the heat shield cover portion 42 have a pair of cover mounting pieces that extend outward in the left-right direction from the upper end of the stepped portion, with their upper ends bent backward. These cover mounting pieces have screw insertion holes at positions corresponding to the screw holes in the upper surface portion 41a of the strip portion 41. With the cover mounting pieces placed on the upper surface portion 41a of the strip portion 41, the cover mounting pieces are screwed to the upper surface portion 41a of the strip portion 41, thereby fixing the heat shield cover portion 42 in a predetermined position inside the case body 3 without contact with the gas burner 2. This makes it possible to suppress the temperature rise of the heat shield cover portion 42 due to direct heat transfer from the gas burner 2.

[0041] A control board C, a functional component for controlling the operation of the entire gas stove 1, is located diagonally below and behind the left gas burner 2 inside the case body 3. Although not shown in the figure, an igniter, a functional component for igniting each gas burner 2, is located diagonally below and behind the right gas burner 2 inside the case body 3. Functional components are parts that enable the gas stove 1 to perform predetermined functions, and include, for example, gas volume control devices such as control valves for adjusting the amount of gas, display devices such as liquid crystal displays, and power supply devices such as batteries and power supply boards.

[0042] A housing case 5 for housing the control board C is located at the lower rear position inside the case body 3. The housing case 5 has a rectangular box-shaped lower case 50 that opens upward and a rectangular box-shaped upper case 55 that opens downward and to the rear and covers the entire lower case 50 from above.

[0043] The lower case 50 has a rectangular flat inner lower wall portion 50a, an inner front wall portion 50b that rises upward from the front end of the inner lower wall portion 50a, an inner rear wall portion 50c that rises upward from the rear end of the inner lower wall portion 50a, an inner left wall portion 50d that rises upward from the left end of the inner lower wall portion 50a, and an inner right wall portion 50e that rises upward from the right end of the inner lower wall portion 50a. A control board C is disposed on the upper surface of the inner lower wall portion 50a. The lower case 50 is fixed in a predetermined position inside the case body 3 by fastening a pair of mounting pieces that extend outward in the left-right direction from the lower ends of the inner left and right side wall portions 50d and 50e to the previously described inner lower flange portion 35b with screws.

[0044] The upper case 55 has a rectangular flat outer upper wall portion 55a, an outer front wall portion 55b hanging downward from the front end of the outer upper wall portion 55a, an outer left wall portion 55c hanging downward from the left end of the outer upper wall portion 55a, and an outer right wall portion 55d hanging downward from the right end of the outer upper wall portion 55a. The outer upper wall portion 55a of the upper case 55 is inclined upward toward the rear. Although not shown, the upper case 55 is fixed in a predetermined position within the case body 3 by screwing a pair of mounting pieces extending outward in the left-right direction from the rear ends of the outer left and right side wall portions 55c and 55d of the upper case 55 to the opposing wall 35.

[0045] The upper case 55 and the lower case 50 are formed such that the length of the upper case 55 in the front-to-back direction is longer than the length of the lower case 50 in the front-to-back direction, and the height of the upper case 55 in the vertical direction is greater than the height of the lower case 50 in the vertical direction. Therefore, when the upper part of the lower case 50 is covered by the upper case 55, a first passage portion 61 opening downwards is formed between the outer front wall portion 55b of the upper case 55 and the inner front wall portion 50b of the lower case 50. Also, when the upper part of the lower case 50 is covered by the upper case 55, a second passage portion 62 is formed that communicates with the first passage portion 61 and extends rearward from the upper end of the first passage portion 61, between the outer upper wall portion 55a of the upper case 55 and the upper ends of the inner front and rear walls 50b, 50c and inner left and right side walls 50d, 50e of the lower case 50. As will be described later, these passage portions 61 and 62 form part of the cooling passage 6 through which cooling air flows. Therefore, the front ends of the structural walls of the upper case 55 and the lower case 50 constitute a cooling passage structural wall that forms the first passage portion 61, the structural walls of the upper case 55 and the lower case 50 behind the first passage portion 61 constitute a cooling passage structural wall that forms the second passage portion 62, and the outer upper wall portion 55a of the upper case 55 is the second passage This constitutes the upper wall of section 62. Furthermore, the downward-opening opening 65 formed between the lower end of the outer front wall section 55b of the upper case 55 and the lower end of the inner front wall section 50b of the lower case 50 functions as an air intake for drawing cooling air into the first passage section 61. Note that the first passage section 61 and the second passage section 62 may be connected in other parts. In addition, openings may be provided in front of the first passage section 61 or on the left and right sides, or multiple openings may be provided as air intakes.

[0046] The rear opening 56 of the upper case 55 communicates with the lower part of the lower opening 36b of the opposing wall 35 described above. Therefore, between the rear side wall 32 of the case body 3 and the opposing wall 35, these constituent walls and the left and right side walls 33 and 34 of the case body 3 communicate with the second passage section 62 and form a horizontally elongated, flat third passage section 63 that extends from below to above. The second passage section 62 is connected to the third passage section 63 from the front, which is one side of the third passage section 63. The third passage section 63 communicates with an opening 37 that opens to the upper part of the rear side wall 32 of the case body 3, which will be described later, and forms part of the cooling passage 6 through which cooling air flows. Thus, the rear side wall 32 of the case body 3, the opposing wall 35 that faces the rear side wall 32 on the inner side of the case body 3, and the left and right side walls 33 and 34 of the case body 3 constitute the cooling passage constituent walls that form the third passage section 63. Furthermore, the lower part of the lower opening 36b of the opposing wall 35 below the storage case 5 functions as a connection port that connects the second passage section 62 and the third passage section 63. In addition, the upper opening 36a of the opposing wall 35 and the upper part of the lower opening 36b above the storage case 5 function as a communication port that connects the internal space of the case body 3 and the third passage section 63. Note that if the second passage section 62 and the third passage section 63 are connected, the upper part of the lower opening 36b of the opposing wall 35 above the storage case 5 does not necessarily need to be provided.

[0047] As shown in Figures 3 and 4, a plurality of rectangular openings 37 and a U-shaped notch 38 extending downward from the upper end are provided near the upper end of the rear wall 32 of the case body 3. A predetermined gap 39 is formed between the upper end of the rear wall 32 of the case body 3 and the lower surface of the top plate 9. The upper rear space inside the case body 3, including the upper part of the third passage 63, is in communication with the outside of the case body 3 through these openings 37, notches 38, and gap 39. Therefore, these openings 37, etc., function as exhaust ports that exhaust air from inside the case body 3 to the outside of the case body 3. The upper part of the rear wall 32 of the case body 3 constitutes the exhaust outer periphery wall where the exhaust ports are located. The rear end opening 43 that opens behind the heat shield 4 described above is formed to face in the front-rear direction at least a part of the upper opening 36a of the upper part of the opposing wall 35 and at least a part of the openings 37 of the upper part of the rear wall 32 of the case body 3. Furthermore, the bottom wall portion 42a of the heat shield cover portion 42 is formed such that the rear end of the bottom wall portion 42a is located below the lower edge of the opening of the upper opening 36a of the opposing wall 35 and the lower edge of the opening 37 of the rear wall 32 of the case body 3.

[0048] The top plate portion 9 has a hanging wall portion 95 that hangs downward from the peripheral edge of the top plate portion 9. Of the hanging wall portion 95, the rear hanging wall portion 95a that hangs downward from the rear edge of the top plate portion 9 covers the opening 37, etc., which functions as an exhaust port as described above, from the rear when the top plate portion 9 is positioned above the case body 3, and is positioned to face the upper part of the rear side wall 32 of the case body 3 at a predetermined distance apart in the front-rear direction. For this reason, the rear hanging wall portion 95a constitutes an opposing hanging wall portion. Furthermore, when the top plate portion 9 is positioned above the case body 3, the lower end edge of the rear hanging wall portion 95a is positioned below the lower end edge of the opening 37, etc., in the rear side wall 32 of the case body 3. For this reason, when the gas stove 1 is viewed from the rear, the opening 37, etc., in the rear side wall 32 of the case body 3 is concealed by the rear hanging wall portion 95a.

[0049] In the gas stove 1 of this embodiment, when the gas burner 2 is ignited and fuel gas is burned, the temperature of the upper part inside the case body 3 rises due to the radiant heat from the burner body 21 of the gas burner 2. In addition, an upper opening 36a is formed in the upper part of the rear wall 32 of the case body 3 and the opposing wall 35 which is opposite in the front-to-back direction, and the gas inside the case body 3 The high-temperature air heated by radiant heat from the na 2 flows into the third passage 63 through the upper opening 36a, causing the temperature of the air in the upper part of the third passage 63 to rise easily. As a result, the temperature of the air in the upper part of the third passage 63 becomes higher than the temperature of the air in the lower part of the third passage 63 located in the lower part of the case body 3, the temperature of the air in the second passage 62 which communicates with the lower part of the third passage 63, and the temperature of the air in the first passage 61 which communicates with the third passage 63 via the second passage 62. This creates a temperature difference between the upper and lower parts of the cooling passage 6, resulting in a chimney effect where the air in these passages located in the lower part of the case body 3 moves upward. Consequently, at the lower position of the case body 3, low-temperature cooling air from outside the first passage 61 near the opening 65 that opens downward between the outer front wall 55b of the upper case 55 and the inner front wall 50b of the lower case 50 is drawn into the first passage 61 through the opening 65. Furthermore, since the first passage section 61 is in communication with the third passage section 63 via the second passage section 62, the low-temperature cooling air taken into the first passage section 61 flows through the second passage section 62, which houses functional components such as the control board C, and into the third passage section 63. Since the third passage section 63 is in communication with an opening 37, etc., which opens into the rear side wall 32 located at the top of the case body 3, the air flowing into the third passage section 63 is exhausted to the outside of the case body 3 through these openings 37, etc. This forms a cooling passage 6 through which cooling air that cools the functional components is circulated within the case body 3. Therefore, in this embodiment, a diffusion combustion type gas burner 2 is used that does not require primary air for combustion and allows air to easily stagnate within the case body 3. Without providing a cooling fan, the cooling air flowing through the cooling passage 6 formed by heating with the gas burner 2 can cool the functional components such as the control board C housed in the second passage section 62, thereby suppressing damage to the functional components.

[0050] Furthermore, according to this embodiment, since the heat shield 4, consisting of a heat shield cover portion 42 and a strip-shaped portion 41, covers the area below the gas burner 2, the radiant heat from the gas burner 2 into the case body 3 can be reduced. In addition, since the heat shield 4 has a rear end opening 43 that opens toward the upper opening 37 of the rear side wall 32, which is one of the exhaust ports, the high-temperature air inside the heat shield 4 covering the area below the gas burner 2 can easily flow toward the opening 37. As a result, the temperature of the air in the upper part of the third passage portion 63 can be further increased, promoting the chimney effect. This further reduces damage to functional components due to radiant heat from the gas burner 2.

[0051] Furthermore, according to this embodiment, since the outer upper wall portion 55a of the upper case 55 constituting the second passage portion 62 is inclined upward toward the rear, the cooling air heated inside the housing case 5 as it passes through the second passage portion 62 can easily flow into the third passage portion 63 along the inner surface of the outer upper wall portion 55a of the upper case 55. As a result, even if the second passage portion 62 is formed to extend horizontally, and the second passage portion 62 communicates with the third passage portion 63 from the front, which is one side of the third passage portion 63, the cooling air can be smoothly circulated within the cooling passage 6.

[0052] Furthermore, according to this embodiment, the rear hanging wall portion 95a that hangs downward from the rear edge of the top plate portion 9 can conceal the opening 37 of the rear side wall 32 of the case body 3 from the outside of the gas stove 1, thereby improving the design. In addition, it is possible to suppress the intrusion of spills that run down from the top surface of the top plate portion 9 to the rear hanging wall portion 95a into the opening 37, etc.

[0053] Furthermore, according to this embodiment, damage to functional components due to radiant heat from the gas burner 2 can be suppressed without using a cooling fan that consumes a lot of power, thus extending the battery life even when a battery is used as the power source.

[0054] (Other embodiments) (1) In the above embodiment, a diffusion combustion type gas burner is used as the heating means. However, in the present invention, even if a combustion type heating means such as a premixing type gas burner is used, Alternatively, electric heating methods such as halogen heaters may be used.

[0055] (2) In the above embodiment, the case body is open at the top and bottom. However, in the present invention, a case body that is open only at the top may be used. When the case body has a lower wall, preferably an opening for taking in cooling air is formed in the lower wall, and a gap is provided between the cooling passage constituent wall constituting the second passage and the lower wall.

[0056] (3) In the above embodiment, the exhaust port is provided on the rear wall side of the case body. However, in the present invention, the exhaust port may be provided on other constituent walls of the case body.

[0057] (4) In the above embodiment, the first passage is formed to extend in the vertical direction, the second passage is formed to extend in the front-rear direction, and the third passage is formed to extend in the vertical direction. However, in the present invention, the direction in which these passages extend can be set arbitrarily. For example, all passages may be connected in the vertical direction.

[0058] (5) In the above embodiment, the third passage is formed between the rear wall of the case body and the opposing wall on the inside of the case body that faces the rear wall. However, in the present invention, depending on the arrangement of the functional components, the third passage may be formed between other constituent walls of the case body and the opposing wall provided on the inside of the case body.

[0059] (6) In the above embodiment, an opening 37 and a notch 38 are mixed and open above the rear wall 32, but either one or the other may be used. [Explanation of symbols]

[0060] 1. Gas stove 2 gas burners 3. Case body 4. Heat shield 5 storage cases 6 Cooling passage 9. Top panel 32 Rear side wall 35 Opposing wall 36a Upper opening (communication port) 36b Lower opening (connection port) 37. Opening (exhaust vent) 38 Notch (exhaust port) 39. Gap (exhaust vent) 41. Band-shaped portion 42 Heat-shielding cover section 43 Rear end opening 61 1st passage section 62 2nd passage section 63 3rd passage section 65 Opening (Air intake) 95 Opposing hanging wall C Control Board

Claims

1. A case body having an outer perimeter wall that is erected vertically and opening upwards, The top panel covers the case body from above, A heating means is provided, at least in part, inside the case body, Functional components located inside the case body, A cooking appliance having a cooling passage formed inside the case body through which cooling air for cooling functional components flows, The cooling passage is A first passage section having an air intake that can take in cooling air from outside the cooling passage by heating with a heating means, It is connected to the first passage section, and cooling air taken into the first passage section flows in from the first passage section to the second passage section where functional components are housed. It comprises a third passage section that communicates with the second passage section, into which cooling air that has flowed into the second passage section flows, and which has an exhaust port that allows the cooling air to be exhausted to the outside of the case body, The air intake for the first passage opens at the lower part of the case body. The exhaust port of the third passage is a heating appliance that opens either on the upper part of the outer wall of the case body or between the upper part of the outer wall of the case body and the top plate.

2. In the heating appliance described in claim 1, The cooling passage wall constituting the third passage section includes an exhaust outer wall portion of the outer wall of the case body where the exhaust port is located, and an opposing wall that faces the exhaust outer wall portion on the inner side of the case body with a gap between them. A cooking appliance having a communication opening in the opposing wall inside the case body that allows air inside the case body to flow into the third passage when heated by a heating means.

3. In the heating appliance described in claim 2, The opposing walls inside the case are heating appliances with communication openings at the top.

4. In a heating appliance according to any one of claims 1 to 3, The second passage section and the third passage section are connected such that the second passage section communicates with the third passage section from the side. The cooling passage wall constituting the second passage section has an upper wall that covers the functional components from above. The upper wall constituting the second passage section is a heating appliance that slopes upward toward the third passage section.

5. In a heating appliance according to any one of claims 1 to 3, The top panel has a downward-hanging wall portion that extends downward from the periphery of the top panel and faces the exhaust outer periphery wall portion of the case body where the exhaust port is located, with a gap in between. The lower edge of the opposing hanging wall section of the cooking appliance is located below the lower edge of the exhaust vent opening.

6. In a heating appliance according to any one of claims 1 to 3, The air intake for the first passage is located at the bottom of the case body and opens to the side or downward for the cooking appliance.

7. In a heating appliance according to any one of claims 1 to 3, The functional component is a heating device powered by a battery.

8. In a heating appliance according to any one of claims 1 to 3, The heating means is a cooking appliance consisting of a diffusion combustion type gas burner.

9. In a heating appliance according to any one of claims 1 to 3, The case has a heat shield above the functional components inside the case body, which covers the heating means from below. The heat shield is a cooking appliance having an opening that faces the exhaust port.

10. In the heating appliance according to claim 2 or 3, The cooling passage walls constituting the first and second passage sections are formed by housing cases that accommodate functional components and have openings that open toward the third passage section. The opposing wall inside the case body has a connection port that opens toward the second passage section. The second and third passages are connected to the opening of the storage case and the connection port on the opposite wall, respectively, in a cooking appliance.

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