A gas stove energy-gathering disc and a gas stove

Abstract

The present invention provides an energy-gathering disc for a gas stove and a gas stove, relating to the technical field of kitchen utensils. The energy-gathering disc for the gas stove includes a first disc body, a second disc body and a third disc body coaxially provided with annular holes; the first disc body, the second disc body and the third disc body are sequentially stacked and spaced to form a stratified cavity structure; a first air preheating cavity is formed between the first disc body and the second disc body, and a second air preheating cavity is formed between the second disc body and the third disc body; a first secondary air inlet for communicating with an outer ring fire is provided on the inner circle of the first disc body; a second secondary air inlet for communicating the first air preheating cavity and the second air preheating cavity is provided on the outer circle of the second disc body; a third secondary air inlet for communicating with external air is provided on the inner circle of the third disc body. Through the present application, the technical problem that the preheating effect of the secondary air of the existing energy-gathering disc for the gas stove is insufficient before participating in combustion and the combustion thermal efficiency is reduced is alleviated.

Description

Technical Field

[0001] The present invention relates to the technical field of kitchen utensils, and particularly to a heat - concentrating disc for a gas stove and a gas stove. Background Art

[0002] As a necessary kitchen utensil for cooking in daily family life, the products of gas stoves are constantly evolving. In order to pursue higher combustion thermal efficiency, gas stoves with heat - concentrating discs have emerged. Using a heat - concentrating disc for a gas stove in cooking can reduce radiant and convective heat losses, play a role in gathering heat energy; and separate the secondary air required for combustion from the combustion flue gas, enabling the secondary air to more effectively supply the combustion flame, making the combustion more complete, thereby improving the combustion thermal efficiency.

[0003] In some heat - concentrating discs of gas stoves, the inner ring is spaced from the outer side wall of the burner base, forming a radial annular channel. The outer ring fire can directly irradiate the cooktop under the heat - concentrating disc through this annular channel; meanwhile, the secondary air required for the combustion of the outer ring fire can be directly inhaled from the bottom surface of the heat - concentrating disc into this annular channel. Its short path results in insufficient pre - heating effect of the secondary air before participating in combustion, thus reducing the combustion thermal efficiency. Summary of the Invention

[0004] The purpose of the present invention is to provide a heat - concentrating disc for a gas stove and a gas stove, so as to alleviate the technical problem in the prior art that there is a gap between the heat - concentrating disc of the gas stove and the burner and they are directly connected up and down, resulting in insufficient pre - heating effect of the secondary air before participating in combustion and reducing the combustion thermal efficiency.

[0005] The present invention provides a heat - concentrating disc for a gas stove, which includes a first disc body, a second disc body, and a third disc body coaxially provided with a ring hole; the first disc body, the second disc body, and the third disc body are sequentially stacked and spaced to form a layered cavity structure; a first air pre - heating cavity is formed between the first disc body and the second disc body, and a second air pre - heating cavity is formed between the second disc body and the third disc body; a first secondary air inlet for communicating with the outer ring fire is provided on the inner ring of the first disc body; a second secondary air inlet for communicating the first air pre - heating cavity and the second air pre - heating cavity is provided on the outer ring of the second disc body; a third secondary air inlet for communicating with external air is provided on the inner ring of the third disc body.

[0006] Further, the first secondary air inlets are multiple and are circumferentially spaced along the inner ring of the annular first disc body.

[0007] Further, along the axial direction of the ring hole, the inner ring of the first disc body is close to the second disc body, and the outer ring is far from the second disc body; the first disc body extends hierarchically from the inner ring radially outward.

[0008] Further, the first disc body further includes a first annular groove, and the first annular groove is arranged between the inner ring and the outer ring of the first disc body and is coaxial with the ring hole.

[0009] Further, there are multiple second secondary air supplement inlets, which are circumferentially spaced along the outer circumference of the annular second disc body.

[0010] Further, the second disc body includes an annular groove disc, and flanges for fixing to the third disc body are provided on both the inner and outer circles of the annular groove disc.

[0011] Further, there are multiple third secondary air supplement inlets, which are circumferentially spaced along the inner circumference of the annular third disc body.

[0012] Further, the third disc body includes a downwardly concave annular disc, and the third secondary air supplement inlet is opened on the inner side wall of the annular disc.

[0013] Further, the first disc body and the third disc body are fixedly arranged by an edge-turning and pressing process or a welding process.

[0014] Further, pot support feet are provided on the outer circle of the first disc body; and / or, support feet are provided on the third disc body.

[0015] Further, the shape of the outer circle of the layered cavity structure includes a circle, a rectangle, a polygon or an ellipse.

[0016] The present invention also provides a gas stove, which includes a burner, a panel and the above-mentioned gas stove energy-saving disc; the burner is arranged on the panel, and the gas stove energy-saving disc is sleeved on the outside of the burner; a first annular platform coaxial with the annular hole is provided on the outer side wall of the burner, and the inner circle of the first disc body includes a second annular platform coaxial with and superposed on the first annular platform.

[0017] Further, the first disc body further includes an annular slope surface coaxial with the annular hole and connected to the second annular platform, the first secondary air supplement inlet is opened on the annular slope surface, and the annular slope surface, the second annular platform and the outer wall of the burner form a second annular groove.

[0018] Further, the panel and the third disc body are spaced apart to form a third air preheating channel communicating with the external environment, and the third air preheating channel communicates with the second air preheating cavity through the third secondary air supplement inlet.

[0019] Further, the panel and the base of the burner are spaced apart to form a fourth air preheating channel communicating with the inner ring fire, and the fourth air preheating channel communicates with the third air preheating channel.

[0020] The beneficial effects of the gas stove energy-saving disc and the gas stove provided by the present invention are:

[0021] Through the present invention, the first secondary air inlet formed on the first disk body, the second secondary air inlet formed on the second disk body, and the third secondary air inlet formed on the third disk body cause the air preheating chamber area channel in the disk cavity to form a flow direction of an S-shaped structure, enhancing the preheating effect of the secondary air. The secondary air required for the outer-ring flame combustion is preheated sufficiently before participating in the combustion, reducing heat loss, thereby ensuring that the outer-ring flame burns more completely and sufficiently, improving the combustion thermal efficiency, and reducing the carbon monoxide emission in the flue gas.

[0022] The present invention also provides a gas stove. Since it includes all the technical features of the above-mentioned gas stove energy-saving disk, it also has the above-mentioned technical effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 A sectional view of the gas stove energy-saving disk and the gas stove provided by an embodiment of the present invention;

[0025] Figure 2 A schematic diagram of the flow of secondary air during the use of the gas stove energy-saving disk and the gas stove provided by an embodiment of the present invention;

[0026] Figure 3 A top view of the gas stove energy-saving disk provided by an embodiment of the present invention;

[0027] Figure 4 A front three-dimensional perspective view of the gas stove energy-saving disk provided by an embodiment of the present invention;

[0028] Figure 5 A back three-dimensional perspective view of the gas stove energy-saving disk provided by an embodiment of the present invention.

[0029] Reference Signs: 100 - First Disk Body; 110 - First Secondary Air Inlet; 120 - First Annular Groove; 130 - Second Annular Platform; 140 - Annular Slope Surface; 200 - Second Disk Body; 210 - Second Secondary Air Inlet; 300 - Third Disk Body; 310 - Third Secondary Air Inlet; 400 - Burner; 410 - First Annular Platform; 500 - Panel; 1 - First Air Preheating Chamber; 2 - Second Air Preheating Chamber; 3 - Third Air Preheating Channel; 4 - Fourth Air Preheating Channel. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Components of the embodiments of the present invention usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0032] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0033] In the description of the present invention, it should be noted that the orientation or positional relationships indicated by the terms "upper", "lower", "vertical", "horizontal", "inner", "outer", etc. are based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationships in which the products of the present invention are customarily placed during use. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation of the present invention. In addition, the terms "first", "second", "third", "fourth", etc. are only used for descriptive distinction and cannot be construed as indicating or implying relative importance.

[0034] In addition, terms such as "horizontal" and "vertical" do not mean that the components are required to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0035] In the description of the present invention, it should also be noted that unless otherwise clearly specified and defined, the terms "arranged", "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] The following will describe some embodiments of the present invention in detail with reference to the accompanying drawings. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0037] A gas stove is a necessary kitchen appliance for cooking in daily family life. The energy-gathering disk of the gas stove is a product developed from the gas stove in order to pursue higher combustion thermal efficiency. Using the energy-gathering disk of the gas stove in cooking can reduce radiation and convective heat loss, play a role in gathering heat energy, separate the secondary air required for combustion from the combustion flue gas, enable the secondary air to more effectively supply the combustion flame, make the combustion more complete, and thus improve the combustion thermal efficiency; at the same time, the energy-gathering disk of the gas stove can also reduce the emission of carbon monoxide in the flue gas; in addition, the energy-gathering disk of the gas stove can also relieve the temperature rise of the stove panel and the knob.

[0038] At present, the inner ring of some energy-gathering disks of gas stoves is spaced from the outer side wall of the burner base, forming a radial annular channel, so that the outer ring fire can directly irradiate the stove panel under the energy-gathering disk through this annular channel. Due to the spacing between the energy-gathering disk of the gas stove and the burner and the direct connection up and down, this results in the loss of the combustion heat energy gas mass; in addition, the secondary air required for the combustion of the outer ring fire can be inhaled directly from the bottom surface of the energy-gathering disk to this annular channel, and its short path will result in insufficient preheating effect of the secondary air before participating in combustion, thereby reducing the combustion thermal efficiency.

[0039] Based on this, the present invention proposes an energy-gathering disk of a gas stove and a gas stove to alleviate the technical problem that the spacing between the energy-gathering disk of the gas stove and the burner in the prior art and the direct connection up and down lead to a short path for the secondary air to be replenished, resulting in insufficient preheating effect of the secondary air before participating in combustion and reducing the combustion thermal efficiency.

[0040] An embodiment of the present invention provides an energy-gathering disk of a gas stove, as Figure 1 , Figure 3 , Figure 4 , Figure 5 shown, including a first disk body 100, a second disk body 200, and a third disk body 300 coaxially provided with annular holes; the first disk body 100, the second disk body 200, and the third disk body 300 are sequentially stacked and spaced to form a layered cavity structure; a first air preheating cavity 1 is formed between the first disk body 100 and the second disk body 200, and a second air preheating cavity 2 is formed between the second disk body 200 and the third disk body 300; a first secondary air inlet 110 for communicating with the outer ring fire is provided in the inner ring of the first disk body 100; a second secondary air inlet 210 for communicating the first air preheating cavity 1 and the second air preheating cavity 2 is provided in the outer ring of the second disk body 200; a third secondary air inlet 310 for communicating with the external air is provided in the inner ring of the third disk body 300.

[0041] Specifically, during the use of the energy-gathering disk of the gas stove, asFigure 2 As shown, secondary air is replenished from the bottom of the third disk 300, and a part of it flows through the bottom of the third disk 300 to the inner ring fire combustion area; the other part flows into the second air preheating chamber 2 through the third secondary air replenishment inlet 310, and then flows into the first air preheating chamber 1 through the second secondary air replenishment inlet 210, and then flows into the outer ring fire combustion area through the first secondary air replenishment inlet 110. This part of the secondary air flowing into the outer ring fire combustion area has an S-shaped flow direction formed by the above structure, which is conducive to heat insulation, greatly enhances the preheating effect of this part of the secondary air, reduces heat loss, and improves heat utilization.

[0042] Through the present invention, the secondary air required for the combustion of the inner ring fire and the outer ring fire can be smoothly replenished, and the replenished secondary air is fully preheated before being added to the inner ring fire and the outer ring fire to participate in the combustion, ensuring that the combustion of the inner ring fire and the outer ring fire is more complete and more sufficient, improving the combustion thermal efficiency, and reducing the emission of carbon monoxide in the flue gas, effectively alleviating the technical problem that the secondary air required for the combustion of the outer ring fire is short, resulting in insufficient preheating effect of the secondary air before participating in the combustion, thereby reducing the combustion thermal efficiency.

[0043] In this embodiment, along the axis of the annular hole, the inner ring of the first disc 100 is closer to the second disc 200, while the outer ring is farther away from the second disc 200. The first disc 100 extends radially from the inner ring to the outer ring in a hierarchical manner. Specifically, the distance between the first disc 100 and the second disc gradually increases from the inner ring to the outer ring. The shape of the first disc 100 resembles a basin with an annular hole in the center. This structure can better concentrate the combustion heat energy and slow the flow rate of the high-temperature flue gas, extending the heat exchange time with the bottom of the pot, thereby reducing heat exchange losses and effectively improving combustion thermal efficiency.

[0044] Multiple first secondary air inlets 110 are located on the first disk 100 and are spaced apart circumferentially along the inner circumference of the annular first disk 100. It should be noted that the first secondary air inlets 110 can be rectangular or have other shapes, and the spacing between each first secondary air inlet 110 is uniform. To ensure relatively uniform secondary air supply, the first secondary air inlets 110 are evenly spaced throughout the inner circumference of the first disk 100.

[0045] The first disk 100 also includes a first annular groove 120, which is located between the inner and outer rings of the first disk 100 and is coaxial with the annular aperture. The angle between the groove wall and the bottom of the first annular groove 120 is obtuse. The presence of the first annular groove 120 facilitates the storage and accumulation of combustion heat energy, thereby reducing heat loss.

[0046] In this embodiment, the second disk body 200 includes an annular groove disk, and flanges for fixing to the third disk body 300 are provided on both the inner and outer circles of the annular groove disk. The flange of the second disk body 200 and the third disk body 300 can be connected by welding or fixed by other means.

[0047] There are multiple second secondary air inlets 210 located in the second disk body 200, which are circumferentially spaced along the outer circle of the annular second disk body 200. It should be noted that the shape of the second secondary air inlet 210 can be rectangular or other shapes, and the spacing between each second secondary air inlet 210 is the same. In order to ensure that the secondary air can be supplemented relatively evenly, the second secondary air inlets 210 are evenly arranged on the entire outer circle of the second disk body 200.

[0048] The second disk body 200 and the second secondary air inlets 210 provided thereon cause the secondary air preheated in the second air preheating chamber 2 to flow to the first air preheating chamber 1 for further preheating. The second disk body 200 and the second secondary air inlets 210 are part of the S-shaped structure of the secondary air flowing to the outer ring fire, lengthening the supplement path of the secondary air and also lengthening the air preheating time, thereby improving the preheating effect of the secondary air.

[0049] In this embodiment, the third disk body 300 includes a downwardly concave annular disk, and the third secondary air inlet 310 is opened on the inner side wall of the annular disk. Specifically, the third disk body is in the shape of a basin with a ring hole in the middle, and the circumferential direction of the ring hole is a flange structure, and the flange structure is connected to the first disk body. The third secondary air inlet 310 is opened at the flange. It should be noted that when the energy-gathering disk of the gas stove is in normal use, the bottom of the third disk body 300 and the second disk body 200 are placed parallel. In this case, the outer flange of the second disk body 200 is parallel to the outer side wall of the third disk body 300, and the inner flange of the second disk body 200 is parallel to the inner side wall of the third disk body 300. The inner side wall of the third disk body 300 and the inner circle of the first disk body are fixedly connected by welding or other means.

[0050] There are multiple third secondary air inlets 310 located in the third disk body 300, which are circumferentially spaced along the inner circle of the annular third disk body 300. It should be noted that the shape of the third secondary air inlet 310 can be rectangular or other shapes, and the spacing between each third secondary air inlet 310 is the same. In order to ensure that the secondary air can be supplemented relatively evenly, the third secondary air inlets 310 are evenly arranged on the entire inner circle of the third disk body 300.

[0051] In this embodiment, the first disk body 100 and the third disk body 300 are fixedly arranged by using a flanging process or a welding process.

[0052] In this embodiment, pot support feet are provided on the outer ring of the first disk body 100; and / or, support feet are provided on the third disk body 300. During the use of the energy-gathering disk of the gas stove, the support feet provided on the outer ring of the third disk body 300 can assist in placing the energy-gathering disk of the gas stove, providing a more stable supporting force, and improving the safety and stability of the energy-gathering disk of the gas stove during use. The pot support feet provided on the outer ring of the first disk body 100 are helpful for supporting the pot.

[0053] It should be noted that in order to cooperate with the gas stove, the inner ring of the first disk body 100 of the energy-gathering disk of the gas stove is circular. Without affecting the normal use of the energy-gathering disk of the gas stove, according to the actual situation of the stove top, there are many shapes for the outer ring of the layered cavity structure. Exemplarily, they include circular, rectangular, polygonal or elliptical.

[0054] An embodiment of the present invention further provides a gas stove, as Figure 1 shown, including a burner 400, a panel 500, and the above-mentioned energy-gathering disk of the gas stove; the burner 400 is arranged on the panel 500, and the energy-gathering disk of the gas stove is sleeved outside the burner 400; a first annular platform 410 coaxial with the annular hole is provided on the outer side wall of the burner 400, and the inner ring of the first disk body 100 includes a second annular platform 130 coaxially and stacked with the first annular platform 410. The second annular platform 130 and the inner side wall of the third disk body 300 are fixedly connected by a flanging process, a welding process or other means.

[0055] Specifically, a first annular platform 410 is provided on the outer edge of the burner, and a second annular platform 130 extends inward from the inner ring of the first disk body 100, and the second annular platform 130 and the first annular platform 410 are stacked.

[0056] Through this embodiment, the first annular platform 410 on the outer side wall of the burner 400 and the second annular platform 130 in the inner ring of the first disk body 100 are stacked, alleviating the loss of the combustion heat energy gas mass caused by the gap and the up-and-down straight-through between the energy-gathering disk of the gas stove and the burner; in this case, the secondary air required for the outer ring fire combustion needs to be supplemented from the side, enabling the secondary air to be fully preheated and improving the combustion thermal efficiency.

[0057] Specifically, in order to enable the first annular platform 410 and the second annular platform 130 to be stacked, during the use of the gas stove, the first annular platform 410 and the second annular platform 130 are both coaxially arranged with the annular hole. In this case, the outer ring radius of the first annular platform 410 is smaller than the outer ring radius of the second annular platform 130 and larger than the inner ring radius of the second annular platform 130, and the inner ring radius of the first annular platform 410 is smaller than the inner ring radius of the second annular platform 130, enabling the energy-gathering disk of the gas stove to be smoothly sleeved outside the burner 400.

[0058] In this embodiment, the first disk body 100 further includes an annular ramp surface 140 coaxial with the annular hole and connected to the second annular platform 130. The first and second air supplement inlets 110 are opened on the annular ramp surface 140. The annular ramp surface 140, the second annular platform 130, and the outer wall of the burner 400 form a second annular groove. Specifically, one side of the annular ramp surface 140 is connected to the second annular platform 130, and the other side extends towards the outer circle direction of the first disk body 100. The bottom of the second annular groove is the second annular platform 130, and the groove walls are the annular ramp surface 140 and the outer wall of the burner 400.

[0059] The second annular groove avoids the situation where there is a gap between the energy-gathering disk of the gas stove and the burner and it is directly connected up and down, thus alleviating the loss of the combustion heat energy gas mass. At the same time, it can also make the secondary air flowing from the first and second air supplement inlets 110 to above the second annular platform 130 be directly radiated and penetrated by the high-temperature flame of the combustion for heating and then flow to the outer-ring fire to participate in the combustion, making the preheating effect of the secondary air participating in the combustion more sufficient and the temperature higher, increasing the temperature of the combustion flame, and further improving the combustion thermal efficiency.

[0060] In this embodiment, the panel 500 and the third disk body 300 are arranged at intervals to form a third air preheating channel 3 communicating with the external environment. The third air preheating channel 3 communicates with the second air preheating chamber 2 through the third and second air supplement inlets 310. The panel 500 and the base of the burner 400 are arranged at intervals to form a fourth air preheating channel 4 communicating with the inner-ring fire. The fourth air preheating channel 4 communicates with the third air preheating channel 3.

[0061] The secondary air all flows in from the third air preheating channel 3. One part flows into the second air preheating chamber 2 through the third and second air supplement inlets 310 and then is supplied to the outer-ring fire through the S-shaped structure, and the other part flows through the fourth air preheating channel 4 and is supplied to the inner-ring fire after being preheated again.

[0062] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A gas stove, characterized in that: It includes a burner (400), a panel (500), and a gas stove energy-gathering plate; The gas stove energy concentrating plate comprises: a first plate body (100), a second plate body (200) and a third plate body (300) coaxially provided with an annular hole; The first disk (100), the second disk (200) and the third disk (300) are sequentially stacked and spaced apart to form a layered cavity structure; a first air preheating cavity (1) is formed between the first disk (100) and the second disk (200), and a second air preheating cavity (2) is formed between the second disk (200) and the third disk (300); The inner ring of the first disk (100) is provided with a first secondary air supply inlet (110) for communicating with the outer ring fire; the outer ring of the second disk (200) is provided with a second secondary air supply inlet (210) for communicating the first air preheating chamber (1) and the second air preheating chamber (2); the inner ring of the third disk (300) is provided with a third secondary air supply inlet (310) for communicating with external air; The burner (400) is arranged on the panel (500), and the gas stove energy-gathering disk is sleeved on the outside of the burner (400); The outer wall of the burner (400) is provided with a first annular platform (410) coaxial with the annular hole, and the inner ring of the first disk (100) includes a second annular platform (130) coaxial with and superimposed on the first annular platform (410); The first disc (100) further includes an annular slope surface (140) coaxial with the annular hole and connected to the second annular platform (130); the first secondary air supply inlet (110) is opened on the annular slope surface (140); and the annular slope surface (140), the second annular platform (130), and the outer wall of the burner (400) form a second annular groove; There are a plurality of first secondary air supply inlets (110), which are arranged at intervals along the inner circumference of the annular first disk (100); There are a plurality of second secondary air supply inlets (210), which are arranged at intervals along the outer circumference of the annular second disk (200).

2. The gas stove according to claim 1, characterized in that: Along the axial direction of the annular hole, the inner ring of the first disc body (100) is close to the second disc body (200), and the outer ring is away from the second disc body (200); the first disc body (100) extends radially from the inner ring to the outer ring in layers.

3. The gas stove according to claim 2, characterized in that: The first disc body (100) further comprises a first annular groove (120), wherein the first annular groove (120) is arranged between the inner ring and the outer ring of the first disc body (100) and is coaxial with the annular hole.

4. The gas stove according to claim 1, characterized in that: The second disc body (200) comprises an annular groove disc, and both the inner ring and the outer ring of the annular groove disc are provided with flanges for fixing with the third disc body (300).

5. The gas stove according to claim 1, characterized in that: There are a plurality of third secondary air supply inlets (310), which are arranged at intervals along the inner circumference of the annular third disk (300).

6. The gas stove according to claim 5, characterized in that: The third disc body (300) comprises a downwardly concave annular disc, and the third secondary air supply inlet (310) is opened on the inner side wall of the annular disc.

7. The gas stove according to claim 1, characterized in that: The first disk body (100) and the third disk body (300) are fixedly arranged by using a flanging process or a welding process.

8. The gas stove according to claim 1, characterized in that: The outer ring of the first tray (100) is provided with pot supporting feet; and / or the third tray (300) is provided with supporting bottom feet.

9. The gas stove according to claim 1, characterized in that: The outer ring of the layered cavity structure may have a shape including a circle, a rectangle, a polygon or an ellipse.

10. The gas stove according to claim 1, characterized in that: The panel (500) and the third disk (300) are spaced apart to form a third air preheating channel (3) communicating with the external environment; the third air preheating channel (3) is communicated with the second air preheating chamber (2) via the third secondary air supply inlet (310).

11. The gas stove according to claim 10, characterized in that: The panel (500) and the base of the burner (400) are spaced apart to form a fourth air preheating channel (4) communicating with the inner ring fire, and the fourth air preheating channel (4) is communicated with the third air preheating channel (3).

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