Heat shield and gas stove

Abstract

The embodiment of the invention discloses a heat insulation cover and a gas stove, the gas stove is provided with a combustor, a combustion cavity used for placing the combustor is formed in the middle of the heat insulation cover, and the heat insulation cover comprises an upper cover shell, a lower cover shell and a separator; a heat insulation cavity is defined by the lower housing and the upper housing; the separator is arranged in the heat insulation cavity and is connected with the upper housing and the lower housing; the side, close to the combustion cavity, of the upper cover shell and the lower cover shell are arranged in a spaced mode, an air supply channel is formed between the upper cover shell and the lower cover shell, the air supply channel is provided with an air outlet facing the combustion cavity, and the air supply channel is used for blowing out preheated secondary air through the air outlet so as to supply air to the combustor. And the temperature of air in the burner can be further increased, so that gas is fully burnt, the overall heat efficiency of the gas stove is improved, and the energy consumption of the burner is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of kitchenware, and in particular to a heat insulation cover and a gas stove. Background Art

[0002] A gas stove is a common kitchen appliance in daily household life. The gas stove usually comprises a heat insulation cover and a burner. The heat insulation cover is arranged around the outer periphery of the burner for carrying the cooker, and the burner is used for heating the cooker.

[0003] However, in the related art, the combustion efficiency of the burner is low, resulting in excessive energy consumption of the burner. Summary of the invention

[0004] The embodiment of the present application provides a heat insulation cover and a gas stove, which aims to reduce the efficiency of heat loss of the upper cover shell by using the three-layer structure of the heat insulation cover, so that the heat of the upper cover shell is higher, so as to improve the overall thermal efficiency of the gas stove. And by using the air supply channel to supply the preheated secondary gas to the burner, the temperature of the air in the burner can be further increased, so that the gas can be fully burned, thereby improving the overall thermal efficiency of the gas stove and reducing the energy consumption of the burner.

[0005] An embodiment of the present application provides a heat insulation cover, which is suitable for a gas stove. The gas stove has a burner, and a combustion chamber for placing the burner is formed in the middle of the heat insulation cover. The heat insulation cover includes an upper cover shell, a lower cover shell and a partition. The lower cover shell and the upper cover shell are surrounded to form a heat insulation chamber. The partition is arranged in the heat insulation chamber and connects the upper cover shell and the lower cover shell. Among them, on the side close to the combustion chamber, the upper cover shell and the lower cover shell are spaced apart, and an air supply channel is formed between the upper cover shell and the lower cover shell, and the air supply channel has an air outlet facing the combustion chamber. The air supply channel is used to blow out preheated secondary air through the air outlet to supply air to the burner.

[0006] In some of the embodiments, the partition includes a main body and a bent portion, the main body is connected to the lower cover shell; the bent portion is arranged on a side of the main body close to the combustion chamber, and extends toward the upper cover shell and is connected to the upper cover shell; wherein, on the side close to the combustion chamber, an air supply channel is formed between the bent portion, the upper cover shell and the lower cover shell.

[0007] In some of the embodiments, the upper cover shell includes an upper body and an upper inner extension, the upper body is connected to the bent portion; the upper inner extension is arranged on a side of the upper body close to the combustion chamber; the lower cover shell includes a lower body and a lower inner extension, the lower body is connected to the main portion; the lower inner extension is arranged on a side of the lower body close to the combustion chamber; wherein the upper inner extension is separated from the lower inner extension, and the upper inner extension, the lower inner extension and the bent portion form an air supply channel, the air supply channel has an air outlet facing the combustion chamber, the lower inner extension has an air inlet, the air inlet is connected to the air supply channel, secondary air enters the air supply channel through the air inlet, and is blown out through the air outlet after being preheated in the air supply channel to supply air to the burner.

[0008] In some of the embodiments, the lower cover also includes a plurality of middle swirl members, which are arranged at intervals in the air supply channel, and a middle swirl channel is formed between two adjacent middle swirl members. The middle swirl channel is used to change the flow direction of the secondary air in the air supply channel so that the secondary air blown out from the air outlet is arranged axially around the combustion chamber.

[0009] In some of the embodiments, the middle swirl member includes an arcuate swirl plate, which is arranged in the air supply channel and extends in an arc shape; and / or; the middle swirl member includes a planar swirl plate, which is arranged in the air supply channel, and the planar swirl plate is arranged at an angle to the radial direction of the combustion chamber passing through itself.

[0010] In some of the embodiments, the middle swirl member is connected to the lower inner extension portion, and along the axial direction of the combustion chamber, the top end of the middle swirl member is spaced apart from the upper inner extension portion.

[0011] In some of the embodiments, along the axial direction of the combustion chamber, there is a first distance D1 between the top end of the middle swirl element and the upper inner extension portion, and D1 satisfies: 0.1 mm≤D1≤1 mm.

[0012] In some of the embodiments, the upper cover shell also includes an upper body and an upper extension portion, and the upper body is connected to the partition; the upper extension portion is arranged on the side of the upper body away from the combustion chamber, and extends toward the direction close to the lower cover shell to form an extension space; the lower cover shell also includes a lower body and a lower extension portion, and the lower body is connected to the partition; the lower extension portion is arranged on the side of the lower body away from the combustion chamber, and extends toward the direction close to the upper body into the extension space, and the lower extension portion is partially connected to the upper extension portion.

[0013] In some of the embodiments, the upper extension portion includes a connecting sub-portion and an extension sub-portion, the connecting sub-portion is connected to the lower extension portion; the extension sub-portion is spaced apart from the lower extension portion along the radial direction of the combustion chamber; wherein, along the radial direction of the combustion chamber, there is a second distance D2 between the extension sub-portion and the lower extension portion, and D2 satisfies 0.2mm≤D2≤1mm.

[0014] In some of the embodiments, the insulation cavity is divided into a first cavity and a second cavity by a partition. The first cavity is arranged on the side of the partition facing the upper cover shell, and the second cavity is arranged on the side of the partition facing the lower cover shell. An insulation layer is arranged on the surface of the partition, and the insulation layer is used to reduce the heat transfer from the first cavity to the second cavity.

[0015] In some of the embodiments, the upper cover shell also includes an upper body and an internal baffle, and the upper body is connected to the partition; the internal baffle is arranged on a side of the upper body close to the combustion chamber, and is inclined downward or vertically downward in a direction close to the lower cover shell; the internal baffle has an internal baffle surface facing the combustion chamber, and the internal baffle surface is used to gather smoke to the bottom surface of the cooker.

[0016] In some of the embodiments, the upper cover shell further includes an upper body connected to the partition; the upper body has a guide surface on one side away from the lower cover shell, and the height of the guide surface gradually decreases in a direction approaching the combustion chamber.

[0017] In some of the embodiments, the angle between the guide surface and the horizontal plane is a first angle α, and α satisfies: 5°≤α≤15°.

[0018] In some of the embodiments, the upper cover shell has a guide surface for being arranged toward the bottom of the cooker, and the heat insulation cover also includes a plurality of top swirl members, which are arranged on the guide surface, and are arranged at intervals between two adjacent top swirl members, and are used to abut against the bottom surface of the cooker to support the cooker; wherein each top swirl member has two curved surfaces arranged opposite to each other, and when the cooker is placed on the top swirl member, a heating channel is formed between the two oppositely arranged curved surfaces of the two adjacent top swirl members, the guide surface and the bottom surface of the cooker, so as to extend the contact path between the high-temperature smoke and the bottom surface of the cooker.

[0019] In some of the embodiments, the top swirl member includes an arcuate swirl portion, which is protruded from the guide surface and extends in an arc shape; and / or; the top swirl member includes a planar swirl portion, which is protruded from the guide surface and is arranged at an angle to the radial direction of the combustion chamber passing through the planar swirl portion.

[0020] In some embodiments, radial projections of two adjacent top swirl elements passing through their own heat shields do not overlap each other; and / or, along the heat shield from inside to outside, the distance between two adjacent top swirl elements in the circumferential direction of the heat shield gradually increases.

[0021] In some of the embodiments, a side of the top swirl element close to the combustion chamber and away from the guide surface has a chamfer.

[0022] In some embodiments, the partition includes a main body and multiple partitions, and the main body and the upper cover shell are arranged to form a first cavity; the multiple partitions are arranged at least on the side of the main body facing the upper cover shell, and the multiple partitions divide the first cavity into multiple partition cavities to reduce the flow of air in the first cavity.

[0023] In some embodiments, the partition is an annular partition, and two adjacent annular partitions, the main body and the upper cover shell are arranged to form an annular partition cavity.

[0024] In some of the embodiments, along the radial direction of the combustion chamber, there is a first spacing dimension L1 between two adjacent partitions, and L1 satisfies: 10 mm ≤ L1 ≤ 20 mm.

[0025] In some of the embodiments, along the axial direction of the combustion chamber, there is a second spacing dimension L2 between the main body and the upper cover shell, and L2 satisfies: 10mm≤L2≤25mm.

[0026] In some of the embodiments, along the axial direction of the combustion chamber, a side of the partition away from the main body is spaced apart from the upper cover shell.

[0027] In some of the embodiments, along the axial direction of the combustion chamber, there is a third spacing dimension L3 between the top end of the partition and the upper cover shell, and L3 satisfies: 0.5mm≤L3≤2mm.

[0028] In some of the embodiments, the heat shield further includes a lower supporting foot connected to the lower cover shell.

[0029] An embodiment of the present application further provides a gas stove, comprising a burner and a heat insulation cover, wherein the heat insulation cover is arranged outside the burner.

[0030] Based on the heat insulation cover of the present application, the three-layer structure of the heat insulation cover can reduce the heat transfer from the upper cover to the lower cover, so as to reduce the efficiency of heat loss of the upper cover, so that the heat of the upper cover is higher, so as to improve the overall thermal efficiency of the gas stove. In addition, the air supply channel can blow out the preheated secondary air through the air outlet, so as to use the preheated secondary gas to supply air to the burner, which can further increase the temperature of the air in the burner, so that the gas burns fully, thereby improving the overall thermal efficiency of the gas stove and reducing the energy consumption of the burner. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0032] Figure 1 This is a schematic diagram of the structure of a heat shield in one embodiment of the present application;

[0033] Figure 2 For along Figure 1 A schematic diagram of a cross-sectional structure of the AA line;

[0034] Figure 3 for Figure 2 A schematic diagram of the enlarged structure at B in the middle;

[0035] Figure 4 This is a schematic diagram of the exploded structure of a heat shield in one embodiment of the present application;

[0036] Figure 5 for Figure 2 Schematic diagram of the enlarged structure at C in the middle;

[0037] Figure 6 This is a schematic structural diagram of a heat shield in another embodiment of the present application;

[0038] Figure 7 For along Figure 6 A schematic diagram of a cross-sectional structure of the middle DD line;

[0039] Figure 8 for Figure 7 Schematic diagram of the enlarged structure at E in the middle.

[0040] Description of reference numerals: 1, heat shield; 1A, combustion chamber; 1B, heat insulation chamber; 1B1, first cavity; 1B2, second cavity; 1C, air supply channel; 1C1, air outlet; 11, upper cover shell; 111, upper body; 111A, guide surface; 1111, body; 1112, first arc-shaped portion; 1112A, first distal end; 1113, second arc-shaped portion; 1113A, second distal end; 112, upper inner extension portion; 113, upper outer extension portion; 113A, extension space; 1131, connecting sub-portion; 1132, outer extension sub-portion; 114, inner Flow blocking part; 114A, inner flow blocking surface; 12, lower cover shell; 121, lower body; 122, lower inner extension; 122A, air inlet; 123, middle swirl member; 123A, middle swirl channel; 1231, arc swirl plate; 124, lower outer extension; 13, partition; 13A, thermal insulation layer; 131, main body; 132, bending part; 133, partition; 133A, partition chamber; 14, top swirl member; 14A, top swirl channel; 141, arc swirl part; 141A, chamfer; 15, upper support foot; 16, lower support foot. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0042] Please refer to Figure 1 The embodiment of the present application provides a gas stove (not shown in the figure). In the embodiment of the present application, the gas stove includes a heat insulation cover 1 and a burner. The heat insulation cover 1 is used to be placed on a stove top (not shown in the figure) and to support the cooker to prevent the cooker from sliding or tipping over during the heating process, reduce the occurrence of accidental injuries, and ensure the stability of the cooking process.

[0043] The heat-insulating cover 1 surrounds the outer side of the burner and forms a combustion chamber 1A, so that the flame generated by the burner during operation will pass through the combustion chamber 1A to contact the bottom of the cooker to heat the cooker, and under the surrounding arrangement of the heat-insulating cover 1, the heat of the burner can be concentrated and transferred toward the bottom of the cooker to prevent heat leakage, so that the heat of the flame generated by the burner can fully act on the cooker to improve the thermal efficiency of the burner.

[0044] It is understandable that the heat shield 1 is a circular ring structure with a combustion chamber 1A disposed at the center. Of course, according to actual needs, the heat shield 1 can also be a square ring or other shapes; the combustion chamber 1A can also be a circular hole, a square hole or other shape hole. In the embodiment of the present application, there is no specific limitation on the overall shape of the heat shield 1 and the shape of the combustion chamber 1A.

[0045] Please refer to Figure 1 and Figure 2 In one embodiment, the heat insulation cover 1 includes an upper cover shell 11, a lower cover shell 12 and a partition 13; the lower cover shell 12 and the upper cover shell 11 are surrounded to form a heat insulation cavity 1B; the partition 13 is arranged in the heat insulation cavity 1B and connects the upper cover shell 11 and the lower cover shell 12. The partition 13 is arranged in the heat insulation cavity 1B so that the heat insulation cover 1 forms a three-layer structure, thereby reducing the efficiency of heat transfer from the upper cover shell 11 to the lower cover shell 12, thereby reducing the efficiency of heat loss from the upper cover shell 11, and then the heat of the upper cover shell 11 can be higher, so as to improve the overall thermal efficiency of the gas stove.

[0046] Please refer to Figure 1-3Furthermore, on the side close to the combustion chamber 1A, the upper cover shell 11 and the lower cover shell 12 are arranged at intervals, and an air supply channel 1C is formed between the upper cover shell 11 and the lower cover shell 12. The air supply channel 1C has an air outlet 1C1 connected to the combustion chamber 1A. The air supply channel 1C is used to blow out the preheated secondary air through the air outlet 1C1, so as to use the preheated secondary gas to supply air to the burner, which can increase the combustion temperature of the burner and thereby improve the overall thermal efficiency of the gas stove.

[0047] In the embodiment of the present application, the three-layer structure of the heat insulation cover 1 can reduce the heat transfer from the upper cover shell 11 to the lower cover shell 12, so as to reduce the efficiency of heat loss of the upper cover shell 11, so that the heat of the upper cover shell 11 is higher, so as to improve the overall thermal efficiency of the gas stove. In addition, the air supply channel 1C can blow out the preheated secondary air through the air outlet 1C1, so as to use the preheated secondary gas to supply air to the burner, which can further increase the temperature of the air in the burner, so that the gas burns fully, thereby improving the overall thermal efficiency of the gas stove and reducing the energy consumption of the burner.

[0048] It can be understood that the primary gas comes from the mixture of fuel gas and air in the ejector tube connected to the burner. When the ejector tube provides the primary gas to the burner, the flow rate of the primary gas in the combustion chamber 1A is relatively fast, thereby making the gas pressure in the combustion chamber 1A relatively low, so that the secondary air is sucked into the combustion chamber 1A through the air supply channel 1C, and then the secondary air can be used to supply air to the burner to improve the overall thermal efficiency of the gas stove.

[0049] Please refer to Figure 1 and Figure 2 In one embodiment, the partition 13 includes a main body 131 and a bending portion 132, the main body 131 is connected to the lower cover shell 12; the bending portion 132 is arranged on a side of the main body 131 close to the combustion chamber 1A, and extends toward the direction close to the upper cover shell 11, and is connected to the upper cover shell 11; wherein, on the side close to the combustion chamber 1A, an air supply channel 1C is formed between the bending portion 132, the upper cover shell 11 and the lower cover shell 12. Since the partition 13 connects the upper cover shell 11 and the lower cover shell 12 on the side close to the combustion chamber 1A, the heat of the upper cover shell 11 can be transferred to the lower cover shell 12 through the bending portion 132 on the side close to the combustion chamber 1A, so as to heat the bending portion 132 and the side of the lower cover shell 12 close to the combustion chamber 1A, so that the air supply channel 1C can be heated, and the secondary air can be heated by using the air supply channel 1C, and then the preheated secondary air can be blown out through the air outlet 1C1, so as to use the preheated secondary gas to supply air to the burner, which can further increase the combustion temperature of the burner and improve the overall thermal efficiency of the gas stove.

[0050] It is understandable that when the separator 13 is made of metal, the main body 131 and the bending portion 132 can be obtained by stamping and bending, so that the main body 131 and the bending portion 132 are integrally formed, so that the main body 131 and the bending portion 132 have a higher structural strength, so as to reduce the probability of damage to the bending portion 132 and the main body 131, thereby making the separator 13 have a longer service life, so that the heat insulation cover 1 can have a longer service life. It is understandable that the main body 131 and the bending portion 132 can also be processed separately, and then the main body 131 and the bending portion 132 are connected by a welding process. In the embodiment of the present application, there is no limitation on the specific formation method of the main body 131 and the bending portion 132.

[0051] It is understandable that the connection method between the main body 131 and the lower housing 12 may be, but is not limited to, at least one of screw connection, welding, and riveting. In the embodiment of the present application, there is no specific restriction on the connection method between the main body 131 and the lower housing 12. The connection method between the bending portion 132 and the upper housing 11 may be, but is not limited to, at least one of screw connection, welding, and riveting. In the embodiment of the present application, there is no specific restriction on the connection method between the bending portion 132 and the upper housing 11.

[0052] Please refer to Figure 1-3 Specifically, the upper cover shell 11 includes an upper body 111 and an upper inner extension 112, and the upper body 111 is connected to the bending portion 132; the upper inner extension 112 is arranged on the side of the upper body 111 close to the combustion chamber 1A; the lower cover shell 12 includes a lower body 121 and a lower inner extension 122, and the lower body 121 is connected to the main body 131; the lower inner extension 122 is arranged on the side of the lower body 121 close to the combustion chamber 1A; wherein the upper inner extension 112 and the lower inner extension 122 are separated, and the upper inner extension 112, the lower inner extension 122 and the bending portion 132 form an air supply channel 1C, and the lower inner extension 122 has an air inlet 122A, and the air inlet 122A is connected to the air supply channel 1C, and the secondary air enters the air supply channel 1C through the air inlet 122A, and is blown out through the air outlet 1C1 after being preheated in the air supply channel 1C to supply air to the burner. It is understandable that the air inlet 122A may also be disposed on the lower body 121. In the embodiment of the present application, there is no limitation on the position of the air inlet 122A.

[0053] It is understandable that when the upper cover shell 11 is made of metal, the upper body 111 and the upper inner extension 112 can be obtained by stamping and bending, so that the upper body 111 and the upper inner extension 112 are integrally formed, so that the upper body 111 and the upper inner extension 112 have a higher structural strength, so as to reduce the probability of damage to the upper body 111 and the upper inner extension 112, thereby making the upper cover shell 1 have a longer service life, so that the heat insulation cover 1 can have a longer service life. It is understandable that the upper body 111 and the upper inner extension 112 can also be processed separately, and then the upper body 111 and the upper inner extension 112 are connected by a welding process. In the embodiment of the present application, there is no restriction on the specific formation method of the upper body 111 and the upper inner extension 112. Similarly, there is no specific restriction on the specific formation method of the lower body 121 and the lower inner extension 122, and no further elaboration is made here.

[0054] Please refer to Figure 1-4 Furthermore, in order to improve the heating efficiency of the secondary air, the lower cover 12 also includes a plurality of middle swirl members 123, and the plurality of middle swirl members 123 are all connected to the lower inner extension 122, and are all arranged in the air supply channel 1C, and two adjacent middle swirl members 123 are arranged at intervals, and a middle swirl channel 123A is formed between the two adjacent middle swirl members 123, and the middle swirl channel 123A is used to change the flow direction of the secondary air in the air supply channel 1C, so that the secondary air blown out from the air outlet 1C1 surrounds the axial arrangement of the combustion chamber 1A to extend the movement path of the secondary air, thereby increasing the preset temperature of the secondary air, and thereby improving the overall thermal efficiency of the gas stove.

[0055] Specifically, the middle swirl member 123 may include an arc-shaped swirl plate 1231, which is arranged in the air supply channel 1C and extends in an arc shape, so that the middle swirl channel 123A is arc-shaped, so as to extend the movement path of the secondary air, thereby increasing the preset temperature of the secondary air, and thereby improving the overall thermal efficiency of the gas stove.

[0056] It is understandable that the middle swirl member 123 may also include a plane swirl plate (not shown in the figure), which is arranged in the air supply channel 1C, and the plane swirl plate is arranged at an angle with the radial direction of the combustion chamber 1A passing through itself, and can also change the flow direction of the secondary air, so that the secondary air blown out from the air outlet 1C1 surrounds the axial direction of the combustion chamber 1A to extend the movement path of the secondary air, thereby increasing the preset temperature of the secondary air, and thereby increasing the overall thermal efficiency of the gas stove. In the embodiment of the present application, the specific form of the middle swirl member 123 is not limited.

[0057] Please refer to Figure 1-3In one embodiment, along the axial direction of the combustion chamber 1A, the top end of the middle swirl member 123 is spaced apart from the upper inner extension portion 112, which can reduce the heat transfer from the upper inner extension portion 112 to the lower inner extension portion 122 along the middle swirl member 123, thereby reducing the overall heat loss of the upper cover shell 11, and further making the heat of the upper cover shell 11 higher, so as to improve the overall thermal efficiency of the gas stove.

[0058] Specifically, along the axial direction of the combustion chamber 1A, there is a first distance D1 between the top of the middle swirl member 123 and the upper inner extension 112, and D1 satisfies: 0.1mm≤D1≤1mm, so that the heat of the upper inner extension 112 is not easily transferred to the middle swirl member 123, so that the heat of the upper cover shell 11 is dissipated slowly, the heat of the upper cover shell 11 can be higher, and the overall thermal efficiency of the gas stove can be improved. In addition, the middle swirl member 123 can be used to guide the secondary air, so that the contact area between the secondary air and the middle swirl member 123 is larger, so that the heating efficiency of the secondary air is higher, and the overall thermal efficiency of the gas stove can also be higher.

[0059] If D1 is less than 0.1 mm, the distance between the top of the middle swirl component 123 and the upper inner extension portion 112 will be closer, causing the heat of the upper inner extension portion 112 to be easily transferred to the middle swirl component 123, causing the heat of the upper cover shell 11 to dissipate faster, resulting in lower heat in the upper cover shell 11, and lower overall thermal efficiency of the gas stove.

[0060] If D1>1mm, the distance between the top of the middle vortex component 123 and the upper inner extension 112 will be far, resulting in poor flow guidance effect of the middle vortex component 123, smaller contact area with the secondary air, lower heating efficiency for the secondary air, and lower overall thermal efficiency of the gas stove.

[0061] Please refer to Figure 1 , Figure 2 and Figure 5 In one embodiment, the upper cover shell 11 further includes an upper extension portion 113, which is disposed on a side of the upper body 111 away from the combustion chamber 1A, and extends toward the lower cover shell 12, and forms an extension space 113A; the lower cover shell 12 further includes a lower extension portion 124, which is disposed on a side of the lower body 121 away from the combustion chamber 1A, and extends toward the upper body 111 into the extension space 113A, and the lower extension portion 124 is partially connected to the upper extension portion 113 to reduce the contact area between the upper extension portion 113 and the lower extension portion 124, thereby reducing the heat transfer from the upper extension portion 113 to the lower extension portion 124, so as to reduce the overall heat dissipation efficiency of the upper cover shell 11.

[0062] Please refer to Figure 1 , Figure 2 and Figure 5 Specifically, the upper extension part 113 includes a connecting sub-part 1131 and an extension sub-part 1132, and the connecting sub-part 1131 is connected to the lower extension part 124; along the radial direction of the combustion chamber 1A, the extension sub-part 1132 and the lower extension part 124 are arranged at intervals; wherein, along the radial direction of the combustion chamber 1A, there is a second distance D2 between the extension sub-part 1132 and the lower extension part 124, and D2 satisfies 0.2mm≤D2≤1mm, so that the heat of the upper extension part 113 is not easily transferred to the lower extension part 124, so that the heat loss of the upper cover shell 11 is slow, and the heat of the upper cover shell 11 can be higher, which can improve the overall thermal efficiency of the gas stove. It will also make it difficult for the heat of the heat insulation chamber 1B to dissipate outward through the gap, so that the heat of the heat insulation chamber 1B decreases slowly, thereby making the heat of the upper cover shell 11 higher, and further making the overall thermal efficiency of the gas stove higher.

[0063] If D2 is less than 0.2 mm, the distance between the extension sub-portion 1132 and the lower extension portion 124 will be closer, causing the heat of the upper extension portion 113 to be easily transferred to the lower extension portion 124, resulting in faster heat dissipation of the upper cover shell 11, resulting in lower heat in the upper cover shell 11, and lower overall thermal efficiency of the gas stove.

[0064] If D2>1mm, the distance between the extension sub-portion 1132 and the lower extension portion 124 will be greater, resulting in a larger gap between the extension sub-portion 1132 and the lower extension portion 124, causing the heat of the insulation cavity 1B to be easily dissipated outward through the gap, causing the heat of the insulation cavity 1B to decrease faster, resulting in lower heat in the upper cover shell 11, and lower overall thermal efficiency of the gas stove.

[0065] It can be understood that the connection method between the connecting sub-part 1131 and the lower extension part 124 can be but is not limited to at least one of screw connection, welding and riveting. In the embodiment of the present application, there is no specific limitation on the connection method between the connecting sub-part 1131 and the lower extension part 124.

[0066] Please refer to Figure 1 and Figure 2 In one embodiment, the heat-insulating cavity 1B is divided into a first cavity 1B1 and a second cavity 1B2 by a partition 13. The first cavity 1B1 is arranged on the side of the partition 13 facing the upper cover shell 11, and the second cavity 1B2 is arranged on the side of the partition 13 facing the lower cover shell 12. A heat-insulating layer 13A is arranged on the surface of the partition 13. The heat-insulating layer 13A is used to reduce the heat transfer from the first cavity 1B1 to the second cavity 1B2, thereby reducing the heat loss of the first cavity 1B1 and reducing the heat loss of the upper cover shell 11, thereby making the heat of the upper cover shell 11 higher, and thereby making the overall thermal efficiency of the gas stove higher.

[0067] It is understandable that the heat insulation layer 13A may include at least one of a reflective heat insulation coating, an emissive heat insulation coating, and a composite heat insulation coating. In the embodiment of the present application, the specific form of the heat insulation layer 13A is not limited.

[0068] Please refer to Figure 6 and Figure 7 Furthermore, in order to further reduce the heat loss of the first cavity 1B1, the partition 13 may also include a plurality of partitions 133, and the plurality of partitions 133 are at least arranged on one side of the main body 131 facing the upper cover shell 11. The plurality of partitions 133 divide the first cavity 1B1 into a plurality of partition cavities 133A to reduce the flow of air in the first cavity 1B1, thereby further reducing the heat loss of the first cavity 1B1, so as to achieve heat preservation of the first cavity 1B1, and further improve the overall thermal efficiency of the gas stove.

[0069] It can be understood that the partition 133 can be an annular partition, and two adjacent annular partitions are arranged at radial intervals along the combustion chamber 1A. The two adjacent annular partitions and the main body 131 and the upper cover shell 11 are arranged to form an annular partition cavity to achieve the separation of the first cavity 1B1, thereby reducing the air flow in the first cavity 1B1, and further reducing the heat loss of the first cavity 1B1, so as to reduce the heat loss of the upper cover shell 11, so that the upper cover shell 11 can be maintained at a higher temperature to improve the overall thermal efficiency of the gas stove.

[0070] It is understandable that the bending portion 132 can also be an annular bending portion to increase the contact area between the bending portion 132 and the first cavity 1B1, which can improve the heat transfer from the first cavity 1B1 to the bending portion 132, so that the heat of the air supply channel 1C is higher, thereby improving the heating efficiency of the air supply channel 1C for the secondary air.

[0071] Please refer to Figure 6-8 In one embodiment, along the radial direction of the combustion chamber 1A, there is a first spacing dimension L1 between two adjacent partitions 133, and L1 satisfies: 10mm≤L1≤20mm, so that the number of partitions 133 can be set more reasonably, so that the production cost of the partition 13 is low, and thus the production cost of the heat insulation cover 1 is reduced. In addition, since the distance between two adjacent heat insulation parts is relatively close, the partition chamber 133A is smaller, so that the movement space of air in the partition chamber 133A is smaller, so that the heat loss of the first cavity 1B1 is slower, and thus the heat loss of the upper cover shell 11 is slower, so that the upper cover shell 11 can be kept at a higher temperature, so as to improve the overall thermal efficiency of the gas stove.

[0072] If L1 is less than 10 mm, the distance between two adjacent partitions 133 will be shorter, which will require more partitions 133 to be provided in the first cavity 1B1 , resulting in an increase in the production cost of the partition 13 and the heat shield 1 .

[0073] If L1>20mm, the distance between two adjacent partitions 133 will be greater, resulting in a larger partition cavity 133A, a larger space for air movement in the partition cavity 133A, faster heat dissipation of the first cavity 1B1, faster heat dissipation of the upper cover shell 11, and a lower temperature of the upper cover shell 11.

[0074] Please refer to Figure 7 and Figure 8 In one embodiment, along the axial direction of the combustion chamber 1A, there is a second spacing dimension L2 between the main body 131 and the upper cover shell 11, and L2 satisfies: 10mm≤L2≤25mm, so that the distance between the main body 131 and the upper cover shell 11 is relatively far, thereby reducing the heat transfer from the upper cover shell 11 to the main body 131, so that the upper cover shell 11 can be kept at a higher temperature, so as to improve the overall thermal efficiency of the gas stove. In addition, the partition chamber 133A can be made smaller, so that the air movement space in the partition chamber 133A is smaller, so that the heat loss of the first cavity 1B1 is slower, and then the heat loss of the upper cover shell 11 is slower, so that the upper cover shell 11 can be kept at a higher temperature, so as to improve the overall thermal efficiency of the gas stove.

[0075] If L2 is less than 10 mm, the distance between the main body 131 and the upper shell 11 will be too close, so that the heat of the upper shell 11 is easily transferred to the main body 131, causing the temperature of the upper shell 11 to dissipate faster and the temperature of the upper shell 11 to be lower.

[0076] If L2>25mm, the distance between the main body 131 and the upper cover shell 11 will be too far, resulting in a larger partition cavity 133A, a larger space for air movement in the partition cavity 133A, faster heat dissipation of the first cavity 1B1, faster heat dissipation of the upper cover shell 11, and a lower temperature of the upper cover shell 11.

[0077] Please refer to Figure 7 and Figure 8 In one embodiment, along the axial direction of the combustion chamber 1A, the partition 133 is spaced apart from the upper cover shell 11 on one side away from the main body 131, so as to further reduce the contact area between the partition 13 and the upper cover shell 11, so as to reduce the heat transfer from the upper cover shell 11 to the partition 13, thereby slowing down the heat dissipation of the upper cover shell 11, so that the upper cover shell 11 can be maintained at a higher temperature, so as to improve the overall thermal efficiency of the gas stove.

[0078] Please refer to Figure 7 and Figure 8 Specifically, along the axial direction of the combustion chamber 1A, there is a third spacing dimension L3 between the top of the partition 133 and the upper cover shell 11, and L3 satisfies: 0.5mm≤L3≤2mm, which can reduce the heat transfer from the upper cover shell 11 to the top of the partition 133, so that the upper cover shell 11 can be kept at a higher temperature, thereby improving the overall thermal efficiency of the gas stove. In addition, the distance between the top of the partition 133 and the upper cover shell 11 can be made smaller, so that the air movement space is smaller, so that the heat of the first cavity 1B1 is dissipated more slowly, and then the heat of the upper cover shell 11 is dissipated more slowly, so that the upper cover shell 11 can be kept at a higher temperature, thereby improving the overall thermal efficiency of the gas stove.

[0079] If L3 is less than 0.5 mm, the distance between the top of the partition 133 and the upper shell 11 will be smaller, so that the heat of the upper shell 11 is easily transferred to the partition 133, resulting in faster heat dissipation of the upper shell 11 and lower temperature of the upper shell 11.

[0080] If L3>2mm, the distance between the top of the partition 133 and the upper cover shell 11 will be larger, resulting in a larger space between the top of the partition 133 and the upper cover shell 11, making it easy for air to move in the space between the top of the partition 133 and the upper cover shell 11, causing the heat of the upper cover shell 11 to dissipate faster and the temperature of the upper cover shell 11 to be lower.

[0081] Please refer to Figure 2 In one embodiment, the upper cover shell 11 includes an upper body 111 and an inner baffle 114, and the upper body 111 is connected to the partition 13; the inner baffle 114 is arranged on a side of the upper body 111 close to the combustion chamber 1A, and is inclined downward or vertically downward in the direction close to the lower cover shell 12; the inner baffle 114 has an inner baffle surface 114A facing the combustion chamber 1A, and the inner baffle surface 114A is used to gather smoke to the bottom surface of the cooker, so that the bottom surface of the cooker has higher heat, thereby improving the heating efficiency of the cooker, and further improving the overall thermal efficiency of the gas stove.

[0082] Please refer to Figure 2 In one embodiment, the upper body 111 has a guide surface 111A on one side away from the lower cover 12. The height of the guide surface 111A gradually decreases along the direction approaching the combustion chamber 1A, which can control the change rate of the flow channel cross-sectional area during the flow of smoke from the inside to the outside to be low, thereby making the flow rate of the smoke slower, thereby prolonging the contact time between the smoke and the bottom surface of the cooker, thereby improving the heating efficiency of the cooker.

[0083] Please refer to Figure 2Specifically, the angle between the guide surface 111A and the horizontal plane is a first angle α, and α satisfies: 5°≤α≤15°, which can slow down the flow rate of the smoke, so that the contact time between the smoke and the bottom surface of the cooker is longer, thereby improving the heating efficiency of the cooker.

[0084] If α is less than 5°, the angle between the guide surface 111A and the horizontal plane will be too small, so that the contact time between the smoke and the bottom surface of the cooker is short, resulting in poor heating effect on the cooker.

[0085] If α>15°, the flow velocity of the smoke will be faster, resulting in a shorter contact time between the smoke and the bottom surface of the cooker, resulting in a poor heating effect on the cooker.

[0086] Please refer to Figure 7 and Figure 8 In one embodiment, the upper body 111 includes a body portion 1111, a plurality of first arc portions 1112, and a plurality of second arc portions 1113. The first arc portions 1112 and the second arc portions 1113 are alternately arranged and are both connected to the body portion 1111. The first arc portion 1112 protrudes in a direction away from the lower housing 12 compared to the body portion 1111, and the second arc portion 1113 is recessed in a direction close to the lower housing 12 compared to the body portion 1111, which can extend the movement path of the smoke on the guide surface 111A, thereby increasing the contact time between the high-temperature smoke and the bottom surface of the cooker, so as to improve the heating efficiency of the cooker. When the smoke contacts the surface of the first arc portion 1112 close to the combustion chamber 1A, the surface of the first arc portion 1112 close to the combustion chamber 1A can guide the high-temperature smoke to move in a direction close to the bottom of the cooker, which can further increase the heat exchange efficiency between the high-temperature smoke and the bottom surface of the cooker.

[0087] Please refer to Figure 7 and Figure 8 Specifically, along a direction perpendicular to the main body 1111, the first arc portion 1112 has a first distal end 1112A away from the main body 1111, the second arc portion 1113 has a second distal end 1113A away from the main body 1111, and a third distance D3 is provided between the first distal end 1112A and the second distal end 1113A, where D satisfies 1mm≤D3≤5mm, so that the high-temperature flue gas can stay on the guide surface 111A for a longer time, so that the heat exchange efficiency between the high-temperature flue gas and the bottom of the cooker is higher; and the bottom of the cooker can be heated evenly, reducing the probability of damage to the cooker, so that the cooker can have a longer service life.

[0088] If D3 is less than 1 mm, the high-temperature smoke will stay on the guide surface 111A for a shorter time, so that the heat exchange efficiency between the high-temperature smoke and the bottom of the cooker is low.

[0089] If D3>5mm, the guide surface 111A will fluctuate greatly, which will cause the movement of high-temperature smoke on the guide surface 111A to be greatly hindered, resulting in local accumulation of high-temperature smoke at the bottom of the cooker, causing uneven heating at the bottom of the cooker, and affecting the service life of the cooker.

[0090] Please refer to Figure 1 and Figure 2 In one embodiment, the heat shield 1 further comprises a plurality of top swirl members 14, which are arranged on the guide surface 111A, and are spaced apart from each other, so as to abut against the bottom surface of the cooker to support the cooker; wherein a top swirl channel 14A is formed between the two adjacent top swirl members 14 and the guide surface 111A, so that the high-temperature flue gas flowing through the top swirl channel 14A flows in an axial direction around the combustion chamber 1A, so as to extend the contact path between the high-temperature flue gas and the bottom surface of the cooker, thereby increasing the contact time between the high-temperature flue gas and the bottom surface of the cooker to improve the heating efficiency of the cooker.

[0091] For example, the number of the top swirl members 14 may be 3, 4, 5, or 6. In other embodiments, the number of the top swirl members 14 may be other numbers. In the embodiments of the present application, the number of the top swirl members 14 is not specifically limited.

[0092] Specifically, the top swirl member 14 may include an arcuate swirl portion 141, which is protruding from the guide surface 111A and extends in an arc shape, so that the top swirl channel 14A is arc-shaped, thereby further extending the contact path between the high-temperature flue gas and the bottom surface of the cooker, so as to further increase the contact time between the high-temperature flue gas and the bottom surface of the cooker and improve the heating efficiency of the cooker.

[0093] In other embodiments, the top swirl member 14 may include a planar swirl portion (not shown in the figure), which is convexly arranged on the guide surface 111A, and the planar swirl portion is arranged at an angle to the radial direction of the combustion chamber 1A passing through itself, and can also extend the contact path between the high-temperature flue gas and the bottom surface of the cooker, so as to increase the contact time between the high-temperature flue gas and the bottom surface of the cooker and improve the heating efficiency of the cooker. In the embodiment of the present application, the specific form of the top swirl member 14 is not limited.

[0094] Please refer to Figure 1 and Figure 2 In one embodiment, the radial projections of two adjacent top swirl members 14 passing through their own heat insulation cover 1 do not overlap each other, so that the top swirl channel 14A formed between the two adjacent top swirl members 14 is larger, thereby increasing the contact area between the high-temperature flue gas and the bottom surface of the cooker, thereby improving the heating efficiency of the cooker.

[0095] Please refer to Figure 1 and Figure 2 In one embodiment, along the direction from the inside to the outside of the heat insulation cover 1, the distance between two adjacent top swirl elements 14 in the circumferential direction of the heat insulation cover 1 gradually increases, which can also increase the contact area between the high-temperature flue gas and the bottom surface of the cooker, thereby improving the heating efficiency of the cooker.

[0096] Please refer to Figure 1 and Figure 2 In one embodiment, the top swirl member 14 has a chamfer 141A on one side close to the combustion chamber 1A and away from the guide surface 111A. The chamfer 141A can be used to keep the top swirl member 14 away from the combustion chamber 1A, so that the top swirl member 14 is away from the flame, which can prevent the flame from directly burning the top swirl member 14, thereby reducing the probability of damage to the top swirl member 14, so that the top swirl member 14 can have a longer service life, and thus the heat insulation cover 1 can have a longer service life.

[0097] It can be understood that the extension direction of the arc surface of the arc swirl portion 141 can be the same as the extension direction of the arc surface of the arc swirl plate 1231, so that the airflow direction of the air supply channel 1C is the same as the movement direction of the high-temperature flue gas on the upper cover shell 11, which can reduce energy loss and thus improve the overall thermal efficiency of the gas stove.

[0098] In other embodiments, the extension direction of the arc surface of the arc swirl portion 141 may also be opposite to the extension direction of the arc surface of the arc swirl plate 1231. In the embodiments of the present application, there is no specific limitation on this.

[0099] Please refer to Figure 6 It can be understood that the heat insulation cover 1 can also include upper supporting feet 15, which are connected to the upper cover shell 11 and are used to abut against the bottom surface of the cooker so as to support the cooker with the upper supporting feet 15. Exemplarily, the number of upper supporting feet 15 can be 3, 4, 5, or 6. In other embodiments, the upper supporting feet 15 can also be other numbers. In the embodiment of the present application, there is no specific limitation on the number of upper supporting feet 15. Exemplarily, the connection method between the upper supporting feet 15 and the upper cover shell 11 includes at least one of screw connection, welding, riveting, and clamping. In the embodiment of the present application, there is no specific limitation on the connection method between the upper supporting feet 15 and the upper cover shell 11.

[0100] Please refer to Figure 6In one embodiment, it further includes a lower supporting foot 16, which is connected to the lower cover 12, and the lower supporting foot 16 can be connected to the stove to support the heat insulation cover 1. Exemplarily, the number of the lower supporting feet 16 can be 3, 4, 5, or 6. In other embodiments, the lower supporting feet 16 can also be other numbers. In the embodiment of the present application, the number of the lower supporting feet 16 is not specifically limited. Exemplarily, the connection method of the lower supporting foot 16 and the lower cover 12 includes at least one of screw connection, welding, riveting, and clamping. In the embodiment of the present application, the connection method of the lower supporting foot 16 and the lower cover 12 is not specifically limited. .

[0101] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of this application, it should be understood that if the terms "upper", "lower", "left", "right", etc. indicate an orientation or position relationship based on the orientation or position relationship shown in the drawings, it is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0102] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A heat shield, characterized in that: Applicable to a gas stove, the gas stove has a burner, a combustion chamber for placing the burner is formed in the middle of the heat insulation cover, and the heat insulation cover comprises: Upper cover shell; A lower cover shell, which is arranged together with the upper cover shell to form a heat-insulating cavity; A partition, disposed in the heat-insulating cavity and connecting the upper cover shell and the lower cover shell; Among them, on the side close to the combustion chamber, the upper cover shell and the lower cover shell are spaced apart to form an air supply channel, and the air supply channel has an air outlet connected to the combustion chamber. The air supply channel is used to blow out the preheated secondary air through the air outlet to supply air to the burner.

2. The heat shield according to claim 1, characterized in that The separator comprises: A main body connected to the lower cover; A bending portion, which is arranged on a side of the main body close to the combustion chamber, extends toward the upper cover shell, and is connected to the upper cover shell; Wherein, on a side close to the combustion chamber, the air supplement channel is formed between the bent portion, the upper cover shell and the lower cover shell.

3. The heat shield according to claim 2, characterized in that The upper housing comprises: An upper body connected to the bending portion; An upper inner extension portion, disposed on a side of the upper body close to the combustion chamber; The lower housing comprises: A lower body connected to the main body; A lower inner extension portion, disposed on a side of the lower body close to the combustion chamber; Among them, the upper inner extension part is separated from the lower inner extension part, and the upper inner extension part, the lower inner extension part and the bent part form the air supply channel, the lower body and / or the lower inner extension part has an air inlet connected to the air supply channel, and secondary air enters the air supply channel through the air inlet.

4. The heat shield according to claim 3, characterized in that The lower housing also includes: A plurality of middle swirl members are arranged at intervals in the air supply channel, and a middle swirl channel is formed between two adjacent middle swirl members. The middle swirl channel is used to change the flow direction of the secondary air in the air supply channel so that the secondary air blown out from the air outlet is arranged axially around the combustion chamber.

5. The heat shield according to claim 4, characterized in that The middle swirl component comprises: An arc-shaped swirl plate is arranged in the air supply channel and extends in an arc shape; and / or; The plane swirl plate is arranged in the air supplement channel, and the plane swirl plate is arranged at an angle with the radial direction of the combustion chamber passing through the plane swirl plate.

6. The heat shield according to claim 4, characterized in that The middle swirl member is connected to the lower inner extension portion, and along the axial direction of the combustion chamber, the top end of the middle swirl member is spaced apart from the upper inner extension portion.

7. The heat shield according to claim 6, characterized in that Along the axial direction of the combustion chamber, there is a first distance D1 between the top end of the middle swirl element and the upper inner extension portion, and D1 satisfies: 0.1 mm≤D1≤1 mm.

8. The heat shield according to claim 1, wherein: The upper housing comprises: an upper body connected to the partition; An upper extension portion is disposed on a side of the upper body away from the combustion chamber and extends toward the lower cover to form an extension space; The lower housing comprises: A lower body connected to the separator; The lower extension part is arranged on a side of the lower body away from the combustion chamber and extends into the extension space in a direction close to the upper body. The lower extension part is partially connected to the upper extension part.

9. The heat shield according to claim 8, characterized in that The upper extension portion comprises: A connecting sub-portion connected to the lower extension portion; An extension sub-portion, along the radial direction of the combustion chamber, the extension sub-portion and the lower extension portion are arranged at intervals; Wherein, along the radial direction of the combustion chamber, there is a second distance D2 between the extension sub-portion and the lower extension portion, and D2 satisfies 0.2mm≤D2≤1mm.

10. The heat shield according to claim 1, wherein: The partition divides the insulation cavity into a first cavity and a second cavity. The first cavity is arranged on the side of the partition facing the upper cover shell, and the second cavity is arranged on the side of the partition facing the lower cover shell. A heat insulation layer is arranged on the surface of the partition, and the heat insulation layer is used to reduce the heat transfer from the first cavity to the second cavity.

11. The heat shield according to claim 1, wherein: The upper housing comprises: an upper body connected to the partition; The inner baffle is arranged on a side of the upper body close to the combustion chamber, and is inclined downward or vertically downward in a direction close to the lower cover shell; the inner baffle has an inner baffle surface facing the combustion chamber, and the inner baffle surface is used to gather smoke to the bottom surface of the cooker.

12. The heat shield according to claim 1, wherein: The upper housing comprises: The upper body is connected to the partition; the upper body has a guide surface on one side away from the lower cover, and the height of the guide surface gradually decreases along the direction approaching the combustion chamber.

13. The heat shield according to claim 12, characterized in that The angle between the guide surface and the horizontal plane is a first angle α, and α satisfies: 5°≤α≤15°.

14. The heat shield according to claim 1, wherein: The upper cover shell has a flow guide surface arranged toward the bottom of the cooker; the heat insulation cover also includes: A plurality of top swirl members are protruded from the guide surface at intervals, and a top swirl channel is formed between two adjacent top swirl members and the guide surface, so that the flow direction of the smoke flowing through the top swirl channel surrounds the axial arrangement of the combustion chamber.

15. The heat shield according to claim 14, characterized in that The top swirl element comprises: an arc-shaped swirl portion, convexly disposed on the guide surface and extending in an arc shape; and / or, The planar swirl portion is convexly arranged on the guide surface, and the planar swirl portion is arranged at an angle to the radial direction of the combustion chamber passing through the planar swirl portion.

16. The heat shield according to claim 14, wherein: The radial projections of two adjacent top swirl elements along the heat shield passing through the top swirl elements do not overlap each other; and / or, Along the direction from the inside to the outside of the heat shield, the distance between two adjacent top swirl elements in the circumferential direction of the heat shield gradually increases.

17. The heat shield according to claim 14, wherein: A side of the top swirl member close to the combustion chamber and away from the guide surface has a chamfer.

18. The heat shield according to claim 1, wherein: The separator comprises: A main body, which is surrounded by the upper cover shell to form a first cavity; The partition part is at least arranged on a side of the main body facing the upper cover shell, and the partition part divides the first cavity into a plurality of partition cavities to reduce the flow of air in the first cavity.

19. The heat shield according to claim 18, characterized in that The partition is an annular partition, and two adjacent annular partitions, the main body and the upper cover shell are arranged to form an annular partition cavity.

20. The heat shield according to claim 19, wherein: Along the radial direction of the combustion chamber, there is a first spacing dimension L1 between two adjacent partitions, and L1 satisfies: 10mm≤L1≤20mm.

21. The heat shield according to claim 18, wherein: Along the axial direction of the combustion chamber, there is a second spacing dimension L2 between the main body and the upper cover shell, and L2 satisfies: 10mm≤L2≤25mm.

22. The heat shield of claim 18, wherein: Along the axial direction of the combustion chamber, the top end of the partition is spaced apart from the upper cover shell.

23. The heat shield of claim 18, wherein: Along the axial direction of the combustion chamber, a third spacing dimension L3 is provided between the top end of the partition and the upper cover shell, and the L3 satisfies: 0.5 mm ≤ L3 ≤ 2 mm.

24. The heat shield according to any one of claims 1 to 23, characterized in that Also includes: The lower supporting foot is connected to the lower cover shell.

25. A gas stove, characterized in that: include: Burner; The heat shield according to any one of claims 1 to 24, arranged outside the burner.

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