Grill and cooker

Abstract

To provide a grill excellent in cleaning property of a heating chamber.SOLUTION: A grill 2 comprises: a heating chamber 20; a door 21; upper heating means 22 for heating a top surface of a heated object; a pair of lower heating means 23 each of which is arranged on outside of one / the other of a pair of side wall parts 203, and has an infrared radiation radiating part 230 for radiating an infrared radiation into the heating chamber 20 from outside of each side wall part 203 and heating the lower surface or side surface of the heated object; and an exhaust duct 30 for exhausting an exhaust gas in the heating chamber 20 to outside of the heating chamber 20 from an exhaust hole 301. Each side wall part 203 has a side opening 24 on a region facing the infrared radiation radiating part 230 of the lower heating means 23, and the side opening 24 is covered with a side transmission part 26 through which the infrared radiation radiated from the infrared radiation radiating part 230 of the lower heating means 23 is transmitted.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to grills and cooking appliances. [Background technology]

[0002] A known cooking appliance includes a pair of lower burners made of Bunsen burners disposed inside the lower left and right side walls of a heating chamber, and a grill that heats the underside and sides of an object to be heated with exhaust gas emitted from the flame holes of the lower burners toward the center of the heating chamber. In this type of cooking appliance, secondary air guide plates extending from the inner wall surface of each side wall toward the inside of the heating chamber are provided above and below the air inlet openings opened in the lower part of each side wall, thereby guiding secondary air from outside the heating chamber to the vicinity of the flame holes of each lower burner, and the secondary air flow blows the exhaust gas emitted from the flame holes to the center of the heating chamber (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2015-19827 Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, when cooking using a grill, oils and grease from the food ingredients scatter into the heating chamber, making the inside of the heating chamber dirty, and the user must clean the inside of the heating chamber.

[0005] However, grills like the one in Patent Document 1 have many parts that protrude into the heating chamber, such as the lower burner and secondary air guide plate, making it difficult for users to reach areas that need cleaning, resulting in poor cleanability.

[0006] The present invention is intended to solve the above-mentioned problems, and an object of the present invention is to provide a grill whose heating chamber is easy to clean, and a cooking device equipped with such a grill. [Means for solving the problem]

[0007] According to a first aspect of the present technology, a rectangular box-shaped heating chamber having an upper wall, a pair of side walls, a bottom wall, a rear wall, and a front opening that opens forward, and capable of accommodating an object to be heated; A door body that can open and close a front opening of the heating chamber from the front; a pair of lower heating means each having an infrared radiating portion disposed on the outside of a pair of side walls of the heating chamber and radiating infrared rays from the outside of each side wall toward the inside of the heating chamber to heat the lower surface or side surface of the object to be heated; an exhaust duct that is connected to the heating chamber and that constitutes an exhaust passage that communicates with an exhaust port that exhausts exhaust gas from the heating chamber to the outside of the heating chamber; Each side wall portion has a side opening in an area facing the infrared radiating portion of each lower heating means, The side openings of each side wall portion are provided with grilles covered with side transmitting portions through which infrared rays radiated from the infrared radiating portions of each lower heating means can pass.

[0008] According to the first aspect, the lower heating means is separated from the cooking space in the heating chamber by the side transparent portion, which prevents adhesion of dirt such as oil and grease, oily smoke, etc. to the lower heating means and its surrounding parts. Furthermore, according to the first aspect, the number of parts protruding into the heating chamber can be reduced, which improves the cleaning ability of the heating chamber.

[0009] According to a second aspect of the present technology, in the first aspect, a pair of cover bodies that cover the infrared radiating portions of the pair of lower heating means from the outside, Each cover body has a first opening provided in a lower region or a front region of each cover body near the lateral opening of each side wall portion, and a second opening provided in an upper region or a rear region of each cover body above the first opening.

[0010] According to the second aspect, a draft effect occurs when heating is performed by the lower heating means, creating a negative pressure inside the cover body, and a cooling air flow path is formed inside the cover body, where air is taken into the cover body from outside the cover body through the first opening and is exhausted to the outside of the cover body through the second opening. This allows the side transmission portion to be cooled, suppressing a temperature rise in the side transmission portion and improving durability.

[0011] According to a third aspect of the present technology, in the second aspect, Each cover body is configured to communicate with the exhaust duct through the second opening.

[0012] During cooking, a draft effect occurs in the exhaust duct, whereby exhaust gas from the heating chamber is exhausted to the outside of the heating chamber. According to the third aspect, the air inside the cover body is exhausted to the exhaust duct through the second opening, which increases the negative pressure inside the cover body and enhances the draft effect. This makes it easier for cooling air to flow inside the cover body, further cooling the side transmission section.

[0013] According to a fourth aspect of the present technology, in any one of the first to third aspects, The bottom wall of the heating chamber has a bottom reflecting portion near at least the side opening of each side wall portion that reflects infrared rays radiated into the heating chamber from the infrared radiating portion of each lower heating means through the side transmitting portion toward the object to be heated.

[0014] According to the fourth aspect, the bottom surface of the object to be heated can be efficiently heated by the infrared rays reflected by the bottom reflecting portion, thereby improving the heating performance.

[0015] According to a fifth aspect of the present technology, in the fourth aspect, The bottom reflective portion is covered with a bottom transparent portion that transmits infrared light.

[0016] According to the fifth aspect, the bottom wall of the heating chamber can be made easier to clean.

[0017] According to a sixth aspect of the present technology, in any one of the first to fifth aspects, Each of the lower heating means comprises a surface combustion burner having a combustion plate that radiates infrared rays by burning a supplied fuel gas.

[0018] According to the sixth aspect, a gas grill that is easy to clean can be provided.

[0019] According to a seventh aspect of the present technology, in any one of the first to fifth aspects, Each lower heating means is made up of a heater having a heating element that radiates infrared rays when power is supplied.

[0020] According to the seventh aspect, an electric grill that is easy to clean can be provided.

[0021] According to an eighth aspect of the present technology, in the seventh aspect, The heater has a side reflecting portion disposed on the outside of each side wall portion, which reflects infrared rays emitted from the heating element of the heater toward the inside of the heating chamber.

[0022] According to the eighth aspect, the object to be heated can be efficiently heated by infrared rays radiated from the heating element of the heater, thereby improving the heating performance.

[0023] According to a ninth aspect of the present technology, there is provided a cooking device including the grill according to any one of the first to eighth aspects.

[0024] According to the ninth aspect, it is possible to provide a cooking device equipped with a grill that is easy to clean. [Brief explanation of the drawings]

[0025] [Figure 1] FIG. 1 is a schematic perspective view showing an example of a cooking device according to a first embodiment of the present invention. [Figure 2]FIG. 2 is a schematic perspective view of a main part showing an example of a grill according to the first embodiment of the present invention. [Figure 3] FIG. 3 is a schematic perspective view of an example of a main part of a lower portion of the grill according to the first embodiment of the present invention. [Figure 4] FIG. 4 is a schematic longitudinal sectional view of a main part showing an example of a grill according to the first embodiment of the present invention. [Figure 5] FIG. 5 is a schematic cross-sectional view of a main part showing an example of a grill according to the first embodiment of the present invention. [Figure 6] FIG. 6 is a schematic perspective view of an example of a main part of a lower portion of a grill according to the second embodiment of the present invention. [Figure 7] FIG. 7 is a schematic longitudinal sectional view of a main part showing an example of a grill according to the second embodiment of the present invention. [Figure 8] FIG. 8 is a schematic cross-sectional view of a main part showing an example of a grill according to the second embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0026] (Embodiment 1) Hereinafter, a cooking device equipped with a grill according to the present embodiment will be specifically described with reference to the drawings. Fig. 1 is a schematic perspective view showing an example of a cooking device of this embodiment applied to a built-in gas stove, Fig. 2 is a schematic perspective view of the main part of the grill, Fig. 3 is a schematic perspective view of the main part showing the lower part of the grill, Fig. 4 is a schematic vertical cross-sectional view of the main part around the grill, and Fig. 5 is a schematic horizontal cross-sectional view of the main part around the grill. The gas stove 1 has multiple stove burners 3 facing upward from a stove opening (not shown) in the top plate 11, and a grill 2 built into the stove body 10, which is the cooking device body.

[0027] The grill 2 includes a rectangular box-shaped heating chamber 20 having an upper wall 202, a pair of left and right side walls 203, 203, a bottom wall 204, a rear wall 205, and a front opening 200 that opens to the front, and a door 21 that closes the front opening 200 of the heating chamber 20 so that it can be opened and closed from the front. In this specification, the door 21 side is defined as the front side, and when the gas stove 1 is viewed from the door 21 side, the direction in which the door 21 and the rear side of the heating chamber 20 face each other is defined as the front-rear direction, the width direction of the heating chamber 20 is defined as the left-right direction, and the height direction of the heating chamber 20 is defined as the up-down direction.

[0028] The heating chamber 20 contains, for example, a grill plate 4 made of a molded or cast aluminum body with excellent heat conductivity, and metal or ceramic cooking utensils such as a grill rack, cocotte, Dutch oven, etc. (not shown). During cooking, food F is placed on or contained within these cooking utensils and heated. Therefore, in this embodiment, the grill plate 4 and food F constitute the food to be heated.

[0029] Door body 21 is connected to stove body 10 so as to slide back and forth to open and close. Although not shown, a connecting plate extends toward the inside of heating chamber 20 from the lower rear surface of door body 21, and a support frame that supports appliance support 40 for grill plate 4 from below is connected to the connecting plate. As a result, by pulling door body 21 toward you, grill plate 4 is pulled out to the front of heating chamber 20, and by pushing door body 21 rearward, grill plate 4 is stored within heating chamber 20. To avoid complication, appliance support 40 is omitted from Figures 4 and 5.

[0030] An upper-fire burner (upper heating means) 22 is disposed on the upper wall 202 of the heating chamber 20. The upper-fire burner 22 is a surface-combustion, all-primary combustion burner whose underside is composed of a ceramic combustion plate 220, and numerous flame holes are formed over substantially the entire underside of the combustion plate 220. Although not shown, an ignition plug that discharges a spark when a high voltage is applied from an igniter and a thermocouple that serves as a flame detection sensor that detects the presence or absence of a flame are provided at a rear position of the combustion plate 220 of the upper-fire burner 22. When the upper-fire burner 22 is ignited, a flame is formed over the entire underside of the combustion plate 220, and combustion exhaust gas is ejected downward from the combustion plate 220 of the upper-fire burner 22, and infrared rays are radiated. The heat of the combustion exhaust gas and the radiant heat of the infrared rays primarily heat the grill plate 4 and the top surface of the food F placed on the grill plate 4. The upper-fire burner 22 has a venturi section 221 at its rear that extends outward to the right from the upper wall section 202 of the heating chamber 20. Although not shown, a gas nozzle is inserted into an opening that opens at the outer end of the venturi section 221. Therefore, when fuel gas is ejected from the gas nozzle toward the opening of the venturi section 221, the fuel gas is sucked into the venturi section 221 together with the air surrounding the opening, and a mixed gas of the fuel gas and primary air is generated and supplied to the combustion plate 220.

[0031] The left and right side walls 203 of the heating chamber 20 each have a longitudinal side opening 24 extending in the front-to-rear direction. The side openings 24 are larger in both the up-down and front-to-rear directions than the combustion plates 230 of the lower burners 23, which will be described later. The side openings 24 are covered with infrared-transmitting side transmitting portions 26 that are substantially flush with the side walls 203. Therefore, the side transmitting portions 26 oppose the combustion plates 230 of the lower burners 23 in the left-to-right direction, and the side walls 203 with the side transmitting portions 26 form the left and right inner wall surfaces of the heating chamber 20 into substantially flat surfaces. The side transmitting portions 26 can be made of a heat-resistant material, such as crystallized glass, that has excellent infrared transmittance. Furthermore, the side transmission portions 26, 26 may be subjected to a surface treatment such as an oil repellent treatment.

[0032] A pair of left and right lower burners (lower heating means) 23, 23 extending in the front-to-rear direction along the left and right side wall portions 203, 203 are disposed on the outside of the left and right side wall portions 203, 203 of the heating chamber 20. The left and right lower burners 23, 23 have the same configuration except that they are symmetrical, so the configuration of the lower burners 23, 23 and their surroundings will be described using one of the lower burners 23 as an example.

[0033] The lower burner 23 has a generally rectangular shape elongated in the front-to-rear direction and is disposed in an upright position with its short sides generally vertical. Like the upper burner 22, the lower burner 23 is a surface-combustion, all-primary combustion burner whose side surface on the sidewall 203 side is composed of a ceramic combustion plate 230. Although not shown, a spark plug that discharges a spark when a high voltage is applied from an igniter and a thermocouple serving as a flame detection sensor that detects the presence or absence of a flame are provided at a rear position of the combustion plate 230 of the lower burner 23. When the lower burner 23 is ignited, a flame is formed over the entire side surface of the combustion plate 230, and combustion exhaust is ejected toward the sidewall 203, while infrared rays are radiated. The combustion exhaust ejected from the combustion plate 230 of the lower burner 23 is blocked by the side transmission portion 26 described above, while the infrared rays radiated from the combustion plate 230 of the lower burner 23 are transmitted to the side. The infrared rays pass through the side transmission section 26 and are radiated into the heating chamber 20, where the radiant heat primarily heats the grill plate 4 and the underside or sides of the food F placed on the grill plate 4. Therefore, in this embodiment, the combustion plate 230 of the bottom burner 23 constitutes the infrared radiating section. The bottom burner 23 has a venturi section 231 extending rearward at its rear. Although not shown, a gas nozzle is inserted into an opening at the rear end of the venturi section 231. Therefore, when fuel gas is ejected from the gas nozzle toward the opening of the venturi section 231, the fuel gas is sucked into the venturi section 231 together with the air surrounding the opening, generating a mixture of the fuel gas and primary air, which is then supplied to the combustion plate 230. The bottom burner 23 may be disposed in an inclined position, with the upper end of the bottom burner 23 positioned outward relative to the lower end, so that the combustion plate 230 faces the underside of the grill plate 4.

[0034] An exhaust duct 30 is connected to the rear wall 205 of the heating chamber 20, communicating with the cooking space within the heating chamber 20. The exhaust duct 30 may be connected to the upper wall 202 of the heating chamber 20. The exhaust duct 30 is connected to an exhaust port 301 at the upper end, which exhausts exhaust gas, including combustion exhaust and oily smoke generated from ingredients, to the outside of the gas stove 1, forming an exhaust passage 300. The exhaust duct 30 extends obliquely upward from the upper part of the rear wall 205 of the heating chamber 20 toward the underside of the top plate 11, and the exhaust port 301 faces from below into the grill opening 14 opened on the upper surface of the top plate 11. In addition, duct openings 310 (see FIG. 3) that open outward are opened in the left and right duct side walls (not shown) that form the exhaust duct 30. The duct openings 310 are connected to auxiliary openings 530 of the auxiliary duct portion 53 of the cover body 5, which will be described later.

[0035] 2, 3, and 5, a cover body 5 is disposed on the outside of the side wall portion 203 of the heating chamber 20, spaced a predetermined distance from the outside to cover the area where the combustion plate 230 of the lower-fire burner 23 is formed. The cover body 5 is connected to the side wall portion 203 of the heating chamber 20 at a predetermined location on the periphery of the side wall portion 203. Therefore, a recessed chamber recessed toward the outside of the heating chamber 20 is formed by the cover body 5 on the outside of the side wall portion 203 of the heating chamber 20, and an accommodation section 51 for accommodating the combustion plate 230 of the lower-fire burner 23, which is separated from the cooking space within the heating chamber 20, is defined by the side wall portion 203 on which the lateral transmission section 26 of the heating chamber 20 is provided and the front portion of the cover body 5 disposed on the outside of the side wall portion 203. The cover body 5 may be connected to the top wall portion 202 or the bottom wall portion 204.

[0036] The cover body 5 has an upper wall 511, a lower wall 512, a front wall 513, a rear wall 514, and side walls 515 that form the storage section 51. The lower wall 512, which forms the lower region of the cover body 5, has a slit-shaped lower opening 510 (first opening) that opens downward. The rear wall 514, which forms the rear region of the cover body 5, has a rectangular rear opening 520 (second opening) that opens rearward at its upper part. The cover body 5 also has an auxiliary duct section 53 that includes an auxiliary upper wall 531, an auxiliary lower wall 532, an auxiliary rear wall 533, and an auxiliary side wall 534 that extend rearward from the periphery of the rear opening 520, and an auxiliary opening 530 that opens toward the exhaust duct 30. The auxiliary opening 530 is connected to the duct opening 310 of the exhaust duct 30 described above. Therefore, the accommodation portion 51 of the cover body 5 communicates with the exhaust duct 30 via the rear opening 520 and the auxiliary duct portion 53 .

[0037] When the lower burner 23 is burned, a draft effect occurs in which the combustion exhaust gas ejected from the combustion plate 230 of the lower burner 23 is exhausted from the rear opening 520 to the exhaust duct 30. As a result, the inside of the cover body 5 becomes negative pressure, and the air inside the stove body 10 is taken into the accommodation section 51 of the cover body 5 from the lower opening 510. Also, when the upper burner 22 is burned, a draft effect occurs in the exhaust duct 30 in which exhaust gas including the combustion exhaust gas inside the heating chamber 20 is exhausted to the outside of the gas stove 1 through the exhaust duct 30. As a result, the inside of the cover body 5, which communicates with the exhaust duct 30 via the auxiliary duct section 53, becomes even more negative pressure, increasing the draft effect, and the air inside the stove body 10 is smoothly taken into the accommodation section 51 of the cover body 5 from the lower opening 510. The air taken into the accommodation section 51 of the cover body 5 and the combustion exhaust gas ejected from the combustion plate 230 of the lower burner 23 are exhausted to the exhaust duct 30 through the rear opening 520 and the auxiliary duct section 53, and then, together with the exhaust gas in the heating chamber 20, are exhausted to the outside of the gas stove 1 through the exhaust port 301. As a result, a cooling air flow path is formed in the cover body 5, passing from the lower opening 510 through the accommodation section 51 and connecting to the exhaust duct 30 via the rear opening 520 and the auxiliary duct section 53. This allows the side transmission section 26 opposite the combustion plate 230 to be efficiently cooled. In addition, the cover body 5 makes it difficult for the combustion exhaust gas from the lower burner 23 to leak into the stove body 10, thereby reducing the intake of combustion exhaust gas from the opening of the venturi section 231 of the lower burner 23 and the opening of the venturi section 221 of the upper burner 22, and preventing poor combustion in the lower burner 23 and the upper burner 22. Note that, as long as the rear opening 520 is located higher than the lower opening 510, a plurality of lower openings 510 and a plurality of rear openings 520 may be provided. Furthermore, the rear opening 520 is preferably provided rearward of the lower opening 510. Furthermore, the lower opening 510 may be provided in the front region of the cover body 5 (for example, the lower part of the front wall 513 or the side wall 515), or may be provided in both the lower region and the front region. Furthermore, the rear opening 520 may be provided in the upper region of the cover body 5 (for example, the upper part of the top wall 511 or the side wall 515), or may be provided in both the rear region and the upper region.

[0038] A bottom reflecting portion 60 is preferably formed on the upper surface of the bottom wall portion 204 of the heating chamber 20. The bottom reflecting portion 60 reflects, toward the underside of the grill plate 4, infrared rays emitted from the lower burner 23 and transmitted through the side transmitting portion 26 into the heating chamber 20. The bottom reflecting portion 60 may be formed, for example, by laminating a metal plate such as aluminum having high reflectivity on the bottom wall portion 204, or the bottom wall portion 204 may be formed from a BA (bright annealed) material. When the bottom reflecting portion 60 is formed, the bottom reflecting portion 60 is preferably provided near the side opening 24 in an area corresponding to at least the length of the combustion plate 230 of the lower burner 23 in the front-to-rear direction.

[0039] The upper surface of the bottom reflector 60 is preferably covered with a bottom transmitting portion 61. The bottom transmitting portion 61 can be formed, for example, by laminating a heat-resistant material made of crystallized glass on the bottom reflector 60. By covering the upper surface of the bottom reflector 60 with the bottom transmitting portion 61, infrared rays from the lower burner 23 that pass through the side transmitting portion 26 and are radiated into the heating chamber 20 can be reflected by the bottom reflector 60, and cleanability can be improved. The upper surface of the bottom reflector 60 may be subjected to a surface treatment such as an oil-repellent treatment.

[0040] As explained in detail above, according to the grill 2 of this embodiment, the lower burner 23 is separated from the cooking space inside the heating chamber 20 by the side transparent portion 26, which prevents adhesion of dirt such as grease and oily smoke to the lower burner 23 and its surrounding parts. Furthermore, according to this embodiment, the number of parts protruding into the heating chamber 20, such as the lower burner 23 and secondary air guide plate, can be reduced. This makes it possible to provide a grill 2 with excellent cleaning properties inside the heating chamber 20.

[0041] Furthermore, in conventional grills with a lower burner installed inside the heating chamber and air inlets in the side walls, oil and grease flying from the food ingredients during cooking can partially block the flame holes of the lower burner exposed inside the heating chamber or the air inlets in the side walls. As a result, the flame shape can be distorted, the amount of secondary air introduced into the heating chamber can be reduced, and the combustion exhaust cannot fully reach the center of the heating chamber, resulting in reduced heating performance. However, according to this embodiment, the combustion plate 230 of the lower burner 23 is separated from the cooking space inside the heating chamber 20 by the side transmission portion 26, reliably preventing the adhesion of dirt to the lower burner 23 during cooking. Furthermore, according to this embodiment, the interior of the heating chamber 20 can be easily cleaned, thereby preventing a decrease in heating performance due to dirt on the side transmission portion 26. This ensures stable heating performance over a long period of time.

[0042] Furthermore, in grills using a conventional Bunsen burner as the bottom burner, the flame extends horizontally from the flame hole toward the interior of the heating chamber, and secondary air from the air inlet on the side wall causes the combustion exhaust to flow along the direction of the flame, which can easily cause interference between the flame and the cooking utensil, resulting in poor combustion of the Bunsen burner. Furthermore, because heating by the Bunsen burner's combustion exhaust is highly directional, when using cooking utensils such as a grill plate 4 or a Dutch oven, areas that are more exposed to the combustion exhaust become hotter than areas that are less exposed to the combustion exhaust. As a result, temperature distribution is likely to occur in the cooking utensil, causing uneven heating of the heated items, resulting in poor heating performance and a tendency for localized deterioration of the cooking utensil. However, in this embodiment, a surface combustion-type bottom burner 23 is used, which produces a short flame and has a combustion plate 230 that emits infrared rays. The exhaust gas emitted from the bottom burner 23 is blocked by the side transmission section 26, allowing the cooking utensils to be heated by the radiant heat of the infrared rays that spread radially. This prevents deterioration of the combustion of the bottom burner 23, and also reduces the temperature distribution of the cooking utensils compared to when a Bunsen burner is used, allowing the heated items to be heated evenly, resulting in excellent heating performance. Furthermore, because the flame and exhaust gas from the bottom burner 23 do not come into contact with the cooking utensils, localized deterioration of the cooking utensils is suppressed, and the durability of the cooking utensils is improved.

[0043] Furthermore, according to this embodiment, a flow path for cooling air is formed within the cover body 5 by the cover body 5 having the lower opening 510 and the rear opening 520, so that the side transmission portion 26 can be cooled. This makes it possible to suppress a temperature rise in the side transmission portion 26 and improve durability. In particular, according to this embodiment, the cover body 5 communicates with the exhaust duct 30, so that cooling air can easily flow within the cover body 5, further cooling the side transmission portion 26.

[0044] Furthermore, according to this embodiment, the bottom surface of the object to be heated can be efficiently heated by the infrared rays reflected by the bottom reflecting portion 60, thereby improving the heating performance.

[0045] Furthermore, according to this embodiment, the bottom transmitting portion 61 covering the upper surface of the bottom reflecting portion 60 can improve the ease of cleaning the bottom wall portion 204 of the heating chamber 20.

[0046] (Embodiment 2) The grill of this embodiment has the same configuration as the grill of embodiment 1, except that a heater that emits infrared rays is used as the bottom heating means instead of a bottom burner. Therefore, the same components as those of embodiment 1 will be given the same reference numbers and explanations will be omitted, and the differences will be mainly described.

[0047] As shown in Figures 6 to 8, left and right side wall portions 203, 203 of the heating chamber 20 of the grill 2a of this embodiment have side openings 24, 24 elongated in the front-to-rear direction, as in the first embodiment, and the side openings 24, 24 are larger in the up-down and front-to-rear directions than the heating elements 230b, 230b of the heaters 23a, 23a, which will be described later. The side openings 24 are covered with side transmitting portions 26, 26 that transmit infrared rays and are substantially flush with the side wall portions 203, 203. The side transmitting portions 26, 26 face the heating elements 230b, 230b of the heaters 23a, 23a in the left-to-right direction.

[0048] A pair of left and right heaters 23a extending in the front-rear direction along the side walls 203 are disposed on the outside of each of the pair of left and right side walls 203 of the heating chamber 20. The left and right heaters 23a have the same configuration except that they are symmetrical, so the configuration of the heaters 23a and their surroundings will be described using one of the heaters, 23a, as an example.

[0049] The heater 23a includes a cylindrical tube portion 230a extending in the front-rear direction along the side wall portion 203, and a cylindrical The heating element 230b is housed in the cylindrical portion 230a. The cylindrical portion 230a can be, for example, a heat-resistant tube made of crystallized glass having excellent infrared transmittance or ceramic having a high far-infrared radiation amount. The heating element 230b can be, for example, a graphite film obtained by heat-treating a conventionally known polymer film or a polymer film containing a filler.

[0050] Both ends of the cylindrical portion 230a are sealed, and the inside of the cylindrical portion 230a is filled with an inert gas such as nitrogen gas or argon gas. Although not shown, one end of a lead wire is connected to each end of the heating element 230b, and the other end of the lead wire is drawn out from the cylindrical portion 230a. When power is supplied to the lead wire, a current flows through the heating element 230b, and heat is generated due to the resistance of the heating element 230b. At this time, infrared rays are radiated from the heating element 230b. The radiant heat of the infrared rays that pass through the side transmission portion 26 and radiate into the heating chamber 20 primarily heats the grill plate 4 and the underside or side of the food F placed on the grill plate 4. Therefore, in this embodiment, the heating element 230b constitutes the infrared radiating portion.

[0051] A cover body 5a is disposed on the outside of the side wall portion 203 of the heating chamber 20, covering the area where the heating element 230b of the heater 23a is formed at a predetermined distance from the outside. The cover body 5a is connected to the side wall portion 203 of the heating chamber 20 at a predetermined location on the periphery of the side wall portion 203. Therefore, the side wall portion 203 on which the lateral transmission portion 26 of the heating chamber 20 is provided and the cover body 5a disposed on the outside of the side wall portion 203 define an accommodation section 51a that accommodates the heating element 230b of the heater 23a, which is separated from the inside of the heating chamber 20.

[0052] The cover body 5a has a semi-cylindrical side wall 515a, an upper wall 511a extending from the upper end of the side wall 515a toward the side wall portion 203, a lower wall 512a extending from the lower end of the side wall 515a toward the side wall portion 203, a front wall 513a extending from the front end of the side wall 515a toward the side wall portion 203, and a rear wall 514a extending from the rear end of the side wall 515a toward the side wall portion 203. The lower wall 512a, which forms the lower region of the cover body 5a, has a plurality of rectangular lower openings 510a (first openings) that open downward at predetermined intervals in the front-to-rear direction. Furthermore, the rear wall 514a, which forms the rear region of the cover body 5a, has an upper part formed with a rectangular rear opening 520a (second opening) that opens rearward. Furthermore, the cover body 5a includes an auxiliary duct portion 53a having an auxiliary upper wall 531a, an auxiliary lower wall 532a, an auxiliary rear wall 533a, and an auxiliary side wall 534a extending rearward from the periphery of the rear opening 520a, and an auxiliary opening 530a that opens toward the exhaust duct 30. As in the first embodiment, this auxiliary opening 530a is connected to the duct opening 310 of the exhaust duct 30. Therefore, the accommodation portion 51a of the cover body 5a is in communication with the exhaust duct 30 via the rear opening 520a and the auxiliary duct portion 53a.

[0053] Preferably, a side reflecting portion 63 is formed on the inner wall surface of the side wall 515a that protrudes outward from the cover body 5a, and reflects infrared rays emitted from the heater 23a toward the inside of the heating chamber 20. As with the bottom reflecting portion 60 of the first embodiment, the side reflecting portion 63 may be formed by laminating a metal plate such as aluminum having high infrared reflectivity on the side wall 515a, or the side wall 515a may be formed from a BA material.

[0054] When power is supplied to the heater 23a and the heating element 230b generates heat, a draft effect occurs in which hot air generated from the heating element 230b of the heater 23a is exhausted from the rear opening 520a to the exhaust duct 30. As a result, negative pressure is created inside the cover body 5a, and air inside the stove body 10 is taken into the accommodation section 51a of the cover body 5a from the lower opening 510a. Furthermore, when the upper fire burner 22 is burned, a draft effect occurs in which exhaust gas including the combustion exhaust gas inside the heating chamber 20 is exhausted to the outside of the gas stove 1 through the exhaust duct 30. As a result, a further negative pressure is created inside the cover body 5a, which communicates with the exhaust duct 30 via the auxiliary duct section 53a, and the draft effect The airflow increases, allowing air from inside the stove body 10 to be smoothly drawn into the storage section 51a of the cover body 5a through the lower opening 510a. The air drawn into the storage section 51a of the cover body 5a is then exhausted to the exhaust duct 30 through the auxiliary duct section 53a together with the hot air generated from the heating element 230b of the heater 23a, and is then exhausted to the outside of the gas stove 1 through the exhaust port 301 together with the exhaust gas from the heating chamber 20. As a result, a flow path for cooling air is formed in the cover body 5a, passing through the storage section 51a from the lower opening 510a, and connecting to the exhaust duct 30 via the rear opening 520a and the auxiliary duct section 53a. This allows efficient cooling of the heater 23a itself and the side transmission section 26 facing the tubular section 230a of the heater 23a.

[0055] As in the first embodiment, a bottom reflecting portion 60 is preferably formed on the upper surface of the bottom wall portion 204 of the heating chamber 20, which reflects infrared rays from the heater 23a, which are transmitted through the side transmitting portion 26 and radiated into the heating chamber 20, toward the underside of the grill plate 4. Also, as in the first embodiment, the upper surface of the bottom reflecting portion 60 is preferably covered with a bottom transmitting portion 61.

[0056] As described above in detail, according to grill 2a of this embodiment, similar to embodiment 1, heater 23a is separated from the cooking space inside heating chamber 20 by side transparent portion 26, which prevents adhesion of dirt such as oil and grease, oily smoke, etc. to heater 23a and its peripheral components. Furthermore, according to this embodiment, the number of components protruding into heating chamber 20 can be reduced. This makes it possible to provide grill 2a with excellent cleaning properties inside heating chamber 20.

[0057] Furthermore, according to this embodiment, the cleaning ability inside the heating chamber 20 can be improved, and therefore it is possible to suppress a decrease in heating performance due to contamination of the side transmission portion 26. As a result, stable heating performance can be ensured for a long period of time.

[0058] Furthermore, according to this embodiment, since the cookware can be heated by radiant heat from infrared rays that spread radially, the temperature distribution of the cookware is reduced compared to when a Bunsen burner is used, and the heated object can be heated evenly, resulting in excellent heating performance. Furthermore, since only infrared rays are radiated from heater 23a, localized deterioration of the cookware can be suppressed, and the durability of the cookware can be improved.

[0059] Furthermore, according to this embodiment, the heating performance can be improved because the object to be heated can be efficiently heated by the infrared rays radiated from the heater 23a by the side reflecting portion 63. In particular, because the semi-cylindrical side reflecting portion 63 covers the outside of the heater 23a, the infrared rays radiating upward, downward, and outward from the heater 23a can be reflected into the heating chamber 20.

[0060] (Other embodiments) (1) In the above embodiment, the lower heating means radiates infrared rays. However, in the present invention, the lower heating means radiates far infrared rays.

[0061] (2) In the above embodiment, a top burner with full primary combustion is used as the top heating means. However, in the present invention, other burners or heaters may be used as the top heating means.

[0062] (3) In the above embodiment, a cover is provided to cover a part of the lower heating means including the infrared irradiator from the outside. However, in the present invention, a cover may be provided to cover the entire lower heating means from the outside. [Explanation of symbols]

[0063] 1 gas stove 2 Grill 4 Grill Plates 5,5a Cover body 20 Heating cabinet 21 Door body 22 Top burner 23 Lower burner 23a Heater 24 Side opening 26 Lateral transmission part 30 Exhaust duct 60 Bottom reflector 61 Bottom transparent part 63 Lateral reflector 203 Side wall 204 Bottom wall 230 Combustion Plate 230b Heating element 510,510a Downward opening 520,520a Rear opening F Food to be cooked

Claims

1. a rectangular box-shaped heating chamber having an upper wall, a pair of side walls, a bottom wall, a rear wall, and a front opening that opens forward, and capable of accommodating an object to be heated; A door body that can open and close a front opening of the heating chamber from the front; a pair of lower heating means each having an infrared radiating portion disposed on the outside of a pair of side walls of the heating chamber and radiating infrared rays from the outside of each side wall toward the inside of the heating chamber to heat the lower surface or side surface of the object to be heated; an exhaust duct that is connected to the heating chamber and that constitutes an exhaust passage that communicates with an exhaust port that exhausts exhaust gas from the heating chamber to the outside of the heating chamber; Each side wall portion has a side opening in an area facing the infrared radiating portion of each lower heating means, A grill in which the side openings of each side wall portion are covered with side transmitting portions through which infrared rays radiated from the infrared radiating portions of each lower heating means can pass.

2. 10. The grill of claim 1, a pair of cover bodies that cover the infrared radiating portions of the pair of lower heating means from the outside, Each cover body is a grill having a first opening provided in a lower region or a front region of each cover body near the side opening of each side wall portion, and a second opening provided in an upper region or a rear region of each cover body above the first opening.

3. 3. The grill of claim 2, Each cover body is configured to communicate with the exhaust duct through the second opening.

4. The grill according to any one of claims 1 to 3, The bottom wall of the heating chamber has a grill having a bottom reflecting portion near at least the side opening of each side wall portion, which reflects infrared rays radiated into the heating chamber from the infrared radiating portion of each lower heating means through the side transmitting portion toward the object to be heated.

5. 5. The grill of claim 4, The bottom reflective part is a grille covered with a bottom transparent part that transmits infrared light.

6. The grill according to any one of claims 1 to 3, Each lower heating means is a grill consisting of a surface combustion burner having a combustion plate that radiates infrared rays by burning supplied fuel gas.

7. The grill according to any one of claims 1 to 3, Each lower heating means is a grill comprising a heater having a heating element that radiates infrared rays when supplied with power.

8. 8. The grill of claim 7, A grill is provided on the outside of each side wall portion and has a side reflecting portion that reflects infrared rays emitted from the heating element of the heater toward the inside of the heating chamber.

9. A cooking device comprising the grill according to any one of claims 1 to 3.

Images