Heating Regulator

Abstract

To provide a cooking device that can minimize damage to functional components within the case body. [Solution] A cooking appliance 1 is provided with a heat shield 4 inside the case body 3 that covers the bottom of the heating means 2, the heat shield 4 has a bottom wall portion 42a that faces the bottom surface of the heating means 2 at a predetermined distance apart in the vertical direction and extends toward the exhaust port 37, and a temperature rise suppression means 41 that makes the temperature of the bottom wall portion 42a on the exhaust port side, which is close to the exhaust port 37, lower than the temperature of the bottom wall portion 42a on the exhaust port side, which is far from the exhaust port 37.

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 and heats 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 such as an igniter, a gas flow rate 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). Therefore, these functional components may be damaged by radiant heat from the heating means within the case body.

[0003] In order to suppress damage caused by radiant heat from the heating means as described above, the functional components are also covered with a protective member having a heat insulating effect. However, depending on the configuration (shape, material, color, combustion method, etc.) of the heating means, the radiant heat from the heating means may increase and the temperature within the case body may rise. Therefore, even if the functional components are simply covered with a protective member, there is a problem that the functional components are overheated. In particular, unlike a premixed type gas burner that burns a mixed gas of a hydrocarbon-based fuel gas such as LP gas or natural gas and primary air, when a diffusion combustion type gas burner that burns a fuel gas that does not require primary air for combustion such as hydrogen gas is used, an air flow is unlikely to occur within the case body during combustion, so air tends to stagnate within the case body, the temperature within the case body rises, and there is a problem that the functional components are easily damaged.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

[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, A cooking appliance having functional components provided inside the case body, An exhaust vent is provided 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 panel, which communicates with the outside of the case body. A heat shield is provided inside the case body to cover the area below the heating element. The heat shield portion has a bottom wall portion that faces the lower surface of the heating means at a predetermined distance apart in the vertical direction and extends toward the exhaust port. A cooking appliance is provided in which a heat shield is provided with a temperature rise suppression means such that the temperature of the bottom wall on the side close to the exhaust port is lower than the temperature of the bottom wall on the side far from the exhaust port.

[0007] According to the first embodiment described above, a heat shield is provided inside the case body to cover the bottom of the heating means, thus suppressing direct heating of functional components by radiant heat from the heating means. On the other hand, since the bottom wall of the heat shield faces the bottom surface of the heating means in the vertical direction, the bottom wall of the heat shield is heated by radiant heat from the heating means, and the temperature inside the case body rises due to the radiant heat from the heat shield. However, according to the first embodiment described above, the heat shield has a temperature rise suppression means such that the temperature of the bottom wall on the side near the exhaust port is lower than the temperature of the bottom wall on the side far from the exhaust port, so that heat from the bottom wall on the side far from the exhaust port is transferred to the side near the exhaust port. Therefore, the heat transferred to the bottom wall on the side near the exhaust port is radiated into the case body from the end of the bottom wall on the side near the exhaust port, thereby reducing the temperature of the bottom wall on the side far from the exhaust port. In addition, since the bottom wall of the heat shield extends toward the exhaust port, the air heated by the heat radiated from the end of the bottom wall on the side near the exhaust port can be exhausted to the outside of the case body through the exhaust port. This helps to suppress the temperature rise inside the case and minimize damage to functional components.

[0008] According to a second aspect of this technology, in the first embodiment described above, The heat shielding section comprises a main heat shielding section having a bottom wall and a secondary heat shielding section interposed between the lower surface of the heating means near the exhaust port and the upper surface of the bottom wall as a means for suppressing temperature rise.

[0009] According to the second embodiment described above, the temperature of the bottom wall on the side near the exhaust port can be further reduced, so the temperature difference between the bottom wall on the side far from the exhaust port and the bottom wall on the side near the exhaust port becomes larger, and heat from the bottom wall on the side far from the exhaust port is more easily transferred to the side near the exhaust port. As a result, the temperature of the bottom wall on the side far from the exhaust port can be further reduced, and the temperature rise inside the case body can be suppressed.

[0010] According to a third aspect of this technology, in the second aspect described above, The secondary heat shield consists of a holding member that holds the heating means within the case body.

[0011] According to the third embodiment described above, the number of parts in the heating appliance can be reduced, thereby lowering costs.

[0012] According to a fourth aspect of this technology, in the first embodiment described above, The heat shield has a configuration as a means of suppressing temperature rise, in which the distance between the lower surface of the heating means on the side closer to the exhaust port and the upper surface of the bottom wall is greater than the distance between the lower surface of the heating means on the side further from the exhaust port and the upper surface of the bottom wall.

[0013] According to the fourth embodiment described above, the temperature of the bottom wall on the side near the exhaust port can be further reduced, so the temperature difference between the bottom wall on the side far from the exhaust port and the bottom wall on the side near the exhaust port becomes larger, and heat from the bottom wall on the side far from the exhaust port is more easily transferred to the side near the exhaust port. As a result, the temperature of the bottom wall on the side far from the exhaust port can be further reduced, and the temperature rise inside the case body can be suppressed.

[0014] According to a fifth aspect of this technology, in the first aspect described above, The heat shield has a configuration in which, as a means of suppressing temperature rise, the end of the bottom wall on the side close to the exhaust port extends to a position closer to the exhaust port than the lower surface of the heating means.

[0015] According to the fifth embodiment described above, the temperature of the bottom wall on the side near the exhaust port can be further reduced, so the temperature difference between the bottom wall on the side far from the exhaust port and the bottom wall on the side near the exhaust port becomes larger, and heat from the bottom wall on the side far from the exhaust port is more easily transferred to the side near the exhaust port. As a result, the temperature of the bottom wall on the side far from the exhaust port can be further reduced, and the temperature rise inside the case body can be suppressed.

[0016] According to the sixth aspect of this technology, in any one of the first to fifth aspects described above, The end of the bottom wall of the heat shield on the side adjacent to the exhaust port is located below the lower edge of the exhaust port opening.

[0017] According to the above sixth aspect, the air in the case body heated by the heat radiated into the case body from the end of the bottom wall portion on the side close to the exhaust port is smoothly exhausted from the exhaust port to the outside of the case body. Thereby, the temperature rise in the case body can be further suppressed.

[0018] According to the seventh aspect of the present technology, in any one of the above first to sixth aspects, The heat insulation portion has a bottom wall portion, and first side wall portions and second side wall portions that are erected upward from both ends of the bottom wall portion in a direction orthogonal to the direction toward the exhaust port and cover the lower side of the heating means. The heat insulation portion has a first opening that faces the exhaust port and communicates with the inside of the case body on the side close to the exhaust port, and a second opening that communicates with the inside of the case body on the side remote from the exhaust port.

[0019] According to the above seventh aspect, the high-temperature air in the heat insulation portion can be made to flow out of the heat insulation portion into the case body by the air flowing into the heat insulation portion from the second opening, and the temperature of the bottom wall portion of the heat insulation portion can be further reduced. Thereby, the temperature rise in the case body can be further suppressed.

[0020] According to the eighth aspect of the present technology, in the above seventh aspect, The bottom wall portion of the heat insulation portion has an inclined portion that inclines upward toward the exhaust port, at least on the side close to the exhaust port.

[0021] According to the above eighth aspect, the high-temperature air in the heat insulation portion can be smoothly made to flow out toward the exhaust port. Thereby, the temperature rise in the case body can be further suppressed.

[0022] According to the ninth aspect of the present technology, in any one of the above first to eighth aspects, The heating means is composed of a diffusion combustion type gas burner.

[0023] According to the above ninth aspect, even in a cooking heater having a heating means composed of a diffusion combustion type gas burner that does not require primary air for combustion and in which air easily stays in the case body, damage to functional components can be suppressed.

[0024] According to the tenth aspect of this technology, in any one of the first to ninth aspects described above, The bottom wall of the heat shield is made of a highly thermally conductive material.

[0025] According to the tenth embodiment described above, heat from the bottom wall on the far side of the exhaust port is more easily transferred to the side near the exhaust port. As a result, the temperature of the bottom wall on the far side of the exhaust port can be further reduced, and the temperature rise inside the case body can be further suppressed. [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. The invention will be explained with reference to the drawings. Furthermore, this invention can also be applied to built-in gas stoves.

[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 a valve unit for fuel gas. A gas nozzle for injecting fuel gas is provided at the downstream end of the valve unit communicating with the gas outlet. Fuel gas (for example, hydrogen gas) that does not contain primary air is supplied to the gas inlet pipe L. By igniting the fuel gas ejected from the flame hole 24, the fuel gas undergoes diffuse combustion. Furthermore, when hydrogen gas is used as a fuel gas, it may contain small amounts of additives for purposes such as odorization.

[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. The outer circumference of the gas burner 2 has an ignition electrode 27 and a thermocouple ( (Not shown) is attached.

[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 supported from below by the front flange portion 31a and the left and right flange portions 33a and 34a, and the left-to-right center 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 member.

[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. Therefore, the cover bottom wall portion 42a is located above the lower surface of the burner body 21. They are facing each other at a predetermined distance apart in the downward direction. The heat shield cover portion 42 also 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 substantially 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. The front wall portion 42d of the cover also 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 d1 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 d2 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 only needs to have an inclined portion at least at its rear end that slopes upward toward the rear.

[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] An opening 65 is formed between the lower end of the outer front wall portion 55b of the upper case 55 and the lower end of the inner front wall portion 50b of the lower case 50, which communicates with the outside of the case body 3. In addition, 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. When the housing case 5 is heated by the gas burner 2, low-temperature air is drawn into the housing case 5 from the outside through the opening 65, flows through the housing case 5 that houses the control board C, and then flows from the housing case 5 into a passage formed between the rear side wall 32 and the opposing wall 35 of the case body 3. As will be described later, an opening 37 is formed in the upper part of the rear side wall 32 of the case body 3, so the air that flows from the housing case 5 through the opening 56 into the passage formed between the rear side wall 32 and the opposing wall 35 of the case body 3 is exhausted to the outside of the case body 3 through the opening 37. This makes it possible to suppress overheating of the control board C inside the housing case 5.

[0046] As shown in Figures 3 and 4, multiple rectangular openings 37 and a U-shaped notch 38 cut out downwards 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 also formed between the upper end of the rear wall 32 of the case body 3 and the lower surface of the top plate 9. These openings 37, etc., communicate with the outside of the case body 3 and function as exhaust ports for exhausting air from inside the case body 3 to the outside. The rear end opening 43 that opens to the rear of 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 opposing wall 35 and at least a part of the upper opening 37 of the rear wall 32 of the case body 3. Furthermore, the cover bottom wall 42a of the heat shield cover 42 is formed so that the rear end of the cover bottom wall 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.

[0047] 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. 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., of the rear side wall 32 of the case body 3. Therefore, when the gas stove 1 is viewed from the rear, the opening 37 in the rear side wall 32 of the case body 3 is concealed by the rear hanging wall portion 95a.

[0048] According to this embodiment, since a heat shield 4 is provided inside the case body 3 to cover the bottom of the gas burner 2, direct heating of functional components such as the control board C due to radiant heat from the burner body 21 of the gas burner 2 can be suppressed. On the other hand, since the bottom wall portion 42a of the heat shield cover portion 42 faces the lower surface of the burner body 21 of the gas burner 2 in the vertical direction, the bottom wall portion 42a of the heat shield cover portion 42 is heated by the radiant heat from the burner body 21 of the gas burner 2, and the temperature inside the case body 3 rises due to the radiant heat from the heat shield cover portion 42.

[0049] However, according to this embodiment, the burner body 21 is covered from below by the heat shield cover portion 42, and 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-shaped portion 41 are arranged to overlap in the vertical direction. Therefore, when the cover bottom wall portion 42a of the heat shield cover portion 42 is heated by radiant heat from the burner body 21 of the gas burner 2, the temperature of the rear end of the cover bottom wall portion 42a on the exhaust port side, which is close to the opening 37 at the top of the rear side wall 32 that functions as an exhaust port, becomes lower than the temperature of the front end of the cover bottom wall portion 42a on the exhaust port side, which is farther from the opening 37 at the top of the rear side wall 32. Accordingly, in this embodiment, the strip-shaped portion 41, which is a secondary heat shield, functions as a means of suppressing temperature rise.

[0050] Furthermore, according to this embodiment, the distance d1 between the lower surface of the rear end of the burner body 21 and the upper surface of the cover bottom wall portion 42a facing it is greater than the distance d2 between the lower surface of the front end of the burner body 21 and the upper surface of the cover bottom wall portion 42a facing it. Therefore, when the cover bottom wall portion 42a of the heat shield cover portion 42 is heated by the radiant heat from the burner body 21 of the gas burner 2, the temperature of the rear end of the cover bottom wall portion 42a becomes lower than the temperature of the front end of the cover bottom wall portion 42a, similar to the above. In particular, since the rear end of the cover bottom wall portion 42a (i.e., the end of the cover bottom wall portion 42a near the exhaust port) extends rearward to a position beyond the rear end of the burner body 21, the temperature of the rear end of the cover bottom wall portion 42a becomes even lower than the temperature of the front end of the cover bottom wall portion 42a. Therefore, in this embodiment, the configuration formed by the lower surface of the burner body 21 of the gas burner 2 and the upper surface of the cover bottom wall portion 42a of the heat shield cover portion 42 also functions as a means for suppressing temperature rise.

[0051] Furthermore, according to this embodiment, since the bottom wall portion 42a of the heat shield cover portion 42 is formed from a highly thermally conductive material, heat from the front end of the bottom wall portion 42a is transferred to the rear end. As a result, the heat transferred to the rear end of the bottom wall portion 42a is dissipated into the case body 3 from the rear end of the bottom wall portion 42a, thereby reducing the temperature on the front end of the bottom wall portion 42a. In addition, the heat shield cover portion 42 is provided such that the rear end of the bottom wall portion 42a is closer to the opening 37, which is an exhaust port, than the front end, and the bottom wall portion 42a extends toward the opening 37, so that the air heated by the heat dissipation from the rear end of the bottom wall portion 42a can be exhausted to the outside of the case body 3 through the opening 37. Accordingly, in this embodiment, although a diffusion combustion type gas burner 2 is used that does not require primary air for combustion and air tends to stagnate inside the case body 3, the temperature rise inside the case body 3 can be suppressed, and damage to functional components can be reduced. As a means of suppressing temperature rise, a coating of heat-dissipating paint may be formed on the bottom wall portion 42a of the heat-shielding cover portion 42 on the side adjacent to the exhaust port.

[0052] Furthermore, due to radiant heat from the gas burner 2 and heat dissipation from the bottom wall portion 42a of the heat shield cover portion 42, the temperature of the air in the upper part of the case body 3 becomes higher than the temperature of the air in the lower part of the case body 3. As a result, a temperature difference is created between the air in the upper and lower parts of the case body 3, causing a chimney effect where the cooler air in the lower part of the case body 3 moves to the upper part of the case body 3. The bottom wall portion 42a of the heat shield cover portion 42 is tilted upward toward the rear. Because it is angled, the low-temperature air at the bottom of the case body 3 flows along the bottom wall portion 42a of the heat shield cover portion 42 towards the top of the case body 3. This reduces the temperature of the bottom wall portion 42a of the cover. In addition, an opening 37 is formed at the top of the rear wall 32 of the case body 3, and the heat shield portion 4 formed by the heat shield cover portion 42 and the strip portion 41 has a rear end opening 43 that opens toward the rear opening 37, etc. Therefore, the air at the bottom of the case body 3 flows toward the top, passing around the rear end opening 43. As a result, the draft of air flowing toward the top of the case body 3 around the rear end opening 43 pulls the high-temperature air inside the heat shield portion 4, making it easier for the high-temperature air inside the heat shield portion 4 to flow out of the heat shield portion 4 through the rear end opening 43. Furthermore, because the bottom wall portion 42a of the heat shield cover portion 42 is angled upward toward the rear, the high-temperature air inside the heat shield portion 4 can flow out of the heat shield portion 4 smoothly. Furthermore, since a front end opening 44 is formed at the front end of the heat shield cover portion 42, air inside the heat shield portion 4 flows out into the case body 3 through the rear end opening 43 due to draft, creating negative pressure inside the heat shield portion 4. As a result, the cold air from the lower part of the case body 3 flows into the heat shield portion 4 through the front end opening 44. This further lowers the temperature of the heat shield cover portion 42, suppresses the temperature rise inside the case body 3, and reduces damage to the functional components below the gas burner 2.

[0053] Furthermore, according to this embodiment, since the rear end of the cover bottom wall portion 42a of the heat shield cover portion 42 is located below the lower edge of the opening 37 or the like at the top of the rear side wall 32, the air heated by the heat radiated into the case body 3 from the rear end of the cover bottom wall portion 42a can be smoothly exhausted to the outside of the case body 3 through the opening 37 or the like, and the temperature rise inside the case body 3 can be suppressed.

[0054] Furthermore, according to this embodiment, since the strip-shaped portion 41 constituting the sub-heat shield portion of the heat shield portion 4 utilizes a holding member that holds the gas burner 2, the number of parts of the gas stove 1 can be reduced, thereby lowering costs.

[0055] Furthermore, according to this embodiment, when heating is performed by the gas burner 2, air that cools the functional components flows into the housing case 5 that houses the functional components, thus further suppressing damage to the functional components.

[0056] (Other embodiments) (1) In the above embodiment, a diffusion combustion type gas burner is used as the heating means. However, in the present invention, a combustion type heating means such as a premixing type gas burner may be used, or an electric heating means such as a halogen heater may be used.

[0057] (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.

[0058] (3) In the above embodiment, the exhaust port is provided at the rear of the case body. However, in the present invention, the exhaust port may be provided on other structural walls of the case body.

[0059] (4) In the above embodiment, one secondary heat shield is interposed between the lower surface of the heating means and the upper surface of the bottom wall. However, multiple secondary heat shields may be provided.

[0060] (5) In the above embodiment, the distance between the lower surface of the heating means on the side near the exhaust port and the upper surface of the bottom wall is formed to be greater than the distance between the lower surface of the heating means on the side far from the exhaust port and the upper surface of the bottom wall. However, if there are localized protrusions or recesses on the lower surface of the heating means, the distance between the lower surface of the heating means and the upper surface of the bottom wall, excluding these, should satisfy the above configuration.

[0061] (6) In the above embodiment, the heat shield is provided with a first opening that opens toward the rear. However, the first opening may be provided in the side wall as long as it is formed on the side closer to the exhaust port. Also, in the above embodiment, the second opening of the heat shield is formed between the front wall and the bottom wall. However, the second opening may be provided in the side wall as long as it is formed on the side further away from the exhaust port.

[0062] (7) 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]

[0063] 1. Gas stove 2 gas burners 3. Case body 4. Heat shield 9. Top panel 32 Rear side wall 37. Opening (exhaust vent) 38 Notch (exhaust port) 39. Gap (exhaust vent) 41. Band-shaped portion 42 Heat-shielding cover section 42a Cover bottom wall (bottom wall) 43 Rear end opening (first opening) 44 Front end opening (second opening) 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, A cooking appliance having functional components provided inside the case body, An exhaust vent is provided 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 panel, which communicates with the outside of the case body. A heat shield is provided inside the case body to cover the area below the heating element. The heat shield portion has a bottom wall portion that faces the lower surface of the heating means at a predetermined distance apart in the vertical direction and extends toward the exhaust port. A cooking appliance equipped with a heat shield that includes a temperature rise suppression mechanism such that the temperature of the bottom wall on the side close to the exhaust port is lower than the temperature of the bottom wall on the side far from the exhaust port.

2. In the heating appliance described in claim 1, The heat shielding section of the cooking appliance comprises a main heat shielding section having a bottom wall, and a secondary heat shielding section interposed between the lower surface of the heating means on the side near the exhaust port and the upper surface of the bottom wall, which are opposed to each other in the vertical direction, as a means for suppressing temperature rise.

3. In the heating appliance described in claim 2, The secondary heat shield is a heating appliance consisting of a holding member that holds the heating means within the case body.

4. In the heating appliance described in claim 1, The heat shield is configured as a means of suppressing temperature rise, and the distance between the lower surface of the heating means on the side closer to the exhaust port and the upper surface of the bottom wall is greater than the distance between the lower surface of the heating means on the side further from the exhaust port and the upper surface of the bottom wall.

5. In the heating appliance described in claim 1, The heat shield is configured such that, as a means of suppressing temperature rise, the end of the bottom wall on the side near the exhaust port extends to a position closer to the exhaust port than the lower surface of the heating means.

6. In a heating appliance according to any one of claims 1 to 5, The end of the bottom wall on the side closest to the exhaust port is located below the lower edge of the exhaust port opening of the cooking appliance.

7. In a heating appliance according to any one of claims 1 to 5, The heat shield has a bottom wall and a first side wall and a second side wall that are erected upward from both ends of the bottom wall in a direction perpendicular to the direction toward the exhaust port and cover the area below the heating means. The heat shield section of the cooking appliance has a first opening on the side near the exhaust port that is opposite to the exhaust port and communicates with the inside of the case body, and a second opening on the side far from the exhaust port that communicates with the inside of the case body.

8. In the heating appliance according to claim 7, A cooking appliance having a heat shield section whose bottom wall section has an inclined section that slopes upward toward the exhaust port, at least on the side closest to the exhaust port.

9. In a heating appliance according to any one of claims 1 to 5, The heating means is a cooking appliance consisting of a diffusion combustion type gas burner.

10. In a heating appliance according to any one of claims 1 to 5, The bottom wall of the heat shield is a cooking appliance made of a highly thermally conductive material.

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