Gas stove

Abstract

The invention provides a gas stove which comprises a burner, a pot rack, a gas pipe and a flue gas recovery device, and the burner is provided with a gas mixing chamber; the pot rack is annularly arranged and forms a combustion cavity in a surrounding mode, the combustion cavity is used for allowing flame of the combustor to pass through, and the pot rack is further provided with an upper surface facing a cooker; the gas pipe is communicated with the gas mixing chamber and is used for providing gas for the gas mixing chamber; the smoke recovery device is provided with a smoke suction port and a smoke conveying channel which are communicated, the part, provided with the smoke suction port, of the smoke recovery device is located on the upper surface or located on the periphery of the pot frame and at least partially protrudes out of the upper surface upwards so as to be used for collecting smoke, and the smoke conveying channel is communicated with the gas pipe and used for conveying the smoke sucked by the smoke suction port into the gas pipe. According to the embodiment, after smoke enters the fuel gas pipe through the smoke conveying channel, fuel gas can be preheated, so that the temperature of the fuel gas is increased, heat input needed in the combustion process is reduced, the fuel gas can be combusted more sufficiently during combustion, and then the combustion efficiency is improved.

Description

Technical Field

[0001] This application relates to the technical field of kitchen appliances, and particularly to a gas stove. Background Art

[0002] Gas cookers are one of the essential kitchen cooking utensils in daily family life. In order to pursue higher combustion thermal efficiency, some gas cookers adopt a pot support with a heat-gathering plate, and the form of the heat-gathering plate can be single-layer, double-layer or multi-layer. By using a pot support with a heat-gathering plate, the secondary air required for combustion can be separated from the high-temperature flue gas during combustion, so that the high-temperature flue gas during combustion is gathered in the heat-gathering plate, enhancing the heat energy exchange between the high-temperature flue gas and the bottom of the pot, reducing radiation and convective heat losses, and playing a role in gathering heat energy.

[0003] In the related art, although the heat-gathering pot support can concentrate heat to a certain extent, it still cannot completely collect all the high-temperature flue gas within the heat-gathering pot support. This results in a large amount of high-temperature flue gas being lost to the outside during combustion, not only causing waste of heat energy, but also reducing the overall thermal efficiency of the gas stove. Summary of the Invention

[0004] Embodiments of this application provide a gas stove, aiming to improve the problem of the overall thermal efficiency of the gas stove.

[0005] Embodiments of this application provide a gas stove, including:

[0006] A burner having a gas mixing chamber;

[0007] A pot support arranged in a ring and enclosing a combustion chamber for the flame of the burner to pass through, and the pot support also has an upper surface facing the cooking utensil;

[0008] A gas pipe communicating with the gas mixing chamber for supplying gas to the gas mixing chamber; and

[0009] A flue gas recovery device having a smoke suction port and a smoke delivery channel communicating with each other. The part of the flue gas recovery device having the smoke suction port is located on the upper surface or on the outer periphery of the pot support and at least partially protrudes upward from the upper surface for collecting flue gas, and the smoke delivery channel is communicated with the gas pipe for delivering the flue gas sucked by the smoke suction port into the gas pipe.

[0010] In some of these embodiments, the flue gas recovery device includes:

[0011] A smoke collecting member having the smoke suction port, located on the upper surface or on the outer periphery of the pot support and at least partially protruding upward from the upper surface; and

[0012] A smoke delivery pipe is connected to the smoke collection member and the gas burner pipe, and has the smoke delivery channel. The smoke delivery pipe is located outside the pot support.

[0013] In some embodiments thereof, the gas burner pipe includes an inner gas burner pipe and an outer gas burner pipe, and the gas mixing chamber includes a first gas mixing chamber and a second gas mixing chamber; the burner includes:

[0014] A fire divider;

[0015] A central fire cap is disposed on the fire divider and defines the first gas mixing chamber with the fire divider; and

[0016] An outer fire cap is spaced outside the central fire cap and defines the second gas mixing chamber with the fire divider;

[0017] Wherein, the inner gas burner pipe communicates with the first gas mixing chamber, the outer gas burner pipe communicates with the second gas mixing chamber, and the smoke delivery pipe is connected and communicates with at least one of the inner gas burner pipe and the outer gas burner pipe.

[0018] In some embodiments thereof, the smoke delivery pipe includes:

[0019] A smoke delivery main pipe is connected and communicates with the smoke collection member; and,

[0020] Two smoke delivery branch pipes are both connected and communicate with the smoke delivery main pipe. The two smoke delivery branch pipes are arranged at an angle and respectively communicate with the inner gas burner pipe and the outer gas burner pipe.

[0021] In some embodiments thereof, the pot support includes:

[0022] An upper layer cover having the upper surface; and

[0023] A lower layer cover is connected to the upper layer cover and is located below the upper layer cover. An insulation cavity is formed between the lower layer cover and the upper layer cover;

[0024] Wherein, the smoke collection member is annular, is disposed around the circumferential side wall of the upper layer cover and at least partially protrudes upward from the upper surface. A plurality of smoke suction openings are provided, and the plurality of smoke suction openings are spaced apart along the circumferential direction of the smoke collection member.

[0025] In some embodiments thereof, the inner diameter of the smoke collection member is D1, the outer diameter of the upper layer cover is D2, and D1 and D2 satisfy: 0≤D1 - D2≤20mm.

[0026] In some embodiments thereof, a plurality of the smoke suction openings are located on a side of the smoke collection member facing the combustion chamber; and / or

[0027] The smoke suction openings are located above the upper surface.

[0028] In some of these embodiments, the flue gas recovery device further includes:

[0029] A power device, disposed in the main flue gas pipe, the power device is used to drive flue gas and air to enter the flue gas passage from the smoking port and input it into the gas pipe.

[0030] In some of these embodiments, the flue gas recovery device further includes:

[0031] An air supplement member, located below the pot rack and connected to the flue gas pipe, the air supplement member has a first air supplement port facing the combustion chamber, and the first air supplement port is communicated with the flue gas passage, so that the flue gas flowing out of the first air supplement port preheats the secondary air flowing towards the combustion chamber.

[0032] In some of these embodiments, the air supplement member satisfies at least one of the following conditions:

[0033] The air supplement member is annular, and a plurality of the first air supplement ports are provided, and the plurality of first air supplement ports are arranged at intervals on the side of the air supplement member facing the combustion chamber;

[0034] The diameter of the air supplement member is larger than the inner diameter of the pot rack;

[0035] The air supplement member is connected to the lower surface of the pot rack.

[0036] In some of these embodiments, the flue gas recovery device further includes:

[0037] A check valve, disposed in the flue gas pipe, the valve port of the check valve is arranged in the direction of the gas pipe, and is used to block the gas in the gas pipe from flowing through the flue gas pipe to the smoke collecting member.

[0038] In some of these embodiments, the flue gas recovery device further includes:

[0039] A filter member, detachably connected to the flue gas pipe, partially located in the flue gas passage, and the filter member is used to filter the flue gas flowing towards the gas pipe.

[0040] In the embodiment of the present application, the part of the flue gas recovery device with a smoke suction port is located on the upper surface or on the outer periphery of the pot rack and at least partially protrudes upward from the upper surface, so that the smoke suction port can directly contact the high-temperature flue gas generated during the combustion process, thereby effectively recovering it. That is, the smoke suction port is used to collect the flue gas. The smoke delivery channel is connected to the gas pipe. Understandably, the smoke delivery channel is a channel connecting the smoke suction port and the gas pipe, and its function is to transport the high-temperature flue gas inhaled by the smoke suction port into the gas pipe. By collecting the high-temperature flue gas through the smoke suction port, the loss of the high-temperature flue gas is reduced, and the recovery and utilization of the heat of the high-temperature flue gas are realized. After the high-temperature flue gas enters the gas pipe through the smoke delivery channel, it can preheat the gas, thereby increasing the temperature of the gas, reducing the heat input required during the combustion process. That is, when the gas enters the mixing chamber to mix with air, it is easier to reach the temperature conditions required for combustion, enabling it to burn more fully and stably during combustion, and thus improving the combustion efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0042] Figure 1 Structural schematic diagram of a gas stove provided by an embodiment of the present application;

[0043] Figure 2 Structural schematic diagram of a flue gas recovery device connected to a gas pipe provided by an embodiment of the present application;

[0044] Figure 3 For Figure 2 Exploded structural schematic diagram of the flue gas recovery device shown connected to the gas pipe;

[0045] Figure 4 For Figure 2 Another exploded structural schematic diagram of the flue gas recovery device shown connected to the gas pipe;

[0046] Figure 5 Structural schematic diagram of a flue gas recovery device connected to an ejector pipe provided by an embodiment of the present application;

[0047] Figure 6 Structural schematic diagram of a flue gas recovery device connected to an ejector pipe provided by another embodiment of the present application;

[0048] Figure 7 Structural schematic diagram of a flue gas recovery device for supplementing secondary air provided by an embodiment of the present application;

[0049] Figure 8 For Figure 7 the schematic exploded view of the flue gas recovery device shown for supplementing secondary air;

[0050] Figure 9 the schematic exploded view of the air supplementing member provided by an embodiment of the present application;

[0051] Figure 10 the schematic view of the structure of the flue gas recovery device provided by an embodiment of the present application connected to the gas mixing chamber.

[0052] Description of reference numerals:

[0053] 1, gas stove; 10, pot rack; 11, pot rack body; 11a, combustion chamber; 11b, heat insulation chamber; 111, upper cover; 111a, upper surface; 113, lower cover; 113a, lower surface; 12, flue gas recovery device; 121, smoke collecting member; 121a, smoke suction port; 122, smoke delivery pipe; 122a, smoke delivery channel; 1221, smoke delivery main pipe; 1222, smoke delivery branch pipe; 1223, diffusion pipe; 1223a, air delivery outlet; 1223b, gas hole; 123, air supplementing member; 123a, first air supplementing port; 123b, inner cavity; 123c, air supplementing swirl channel; 1231, ring body; 1232, air supplementing swirl member; 124, power device; 13, liquid receiving tray; 14, upper support foot; 15, lower support foot; 20, burner; 20a, gas mixing chamber; 20a1, first gas mixing chamber; 20a2, second gas mixing chamber; 21, burner cap; 211, center burner cap; 212, outer burner cap; 22, flame divider; 23, base; 231, base body; 30, ejector pipe; 31, first ejector pipe; 32, second ejector pipe; 33, ejector section; 34, mixing section; 40, gas pipe; 41, inner gas pipe; 42, outer gas pipe. Detailed implementation manners

[0054] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to 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.

[0055] As Figure 1 shown, the gas stove 1 is a common kitchen appliance that generates flames by burning gases such as natural gas and liquefied petroleum gas for cooking food. The gas stove 1 has been widely used in household and commercial kitchens due to its high efficiency and convenience.

[0056] As Figure 2As shown, the gas stove 1 includes a burner 20, a pot stand 10, and a gas pipe 40. The burner 20 is the core component of the gas stove 1. The burner 20 has a mixing chamber 20a, where gas and air can be mixed and then burned. The pot stand 10 is arranged in a ring shape and encloses a combustion chamber 11a. Specifically, the pot stand 10 can be circular or square-ring-shaped. The circular pot stand 10 can better adapt to the shape of a round cookware, making the heat more evenly distributed around the bottom of the pot. When the diameter of the circular pot stand 10 is equal to the side length of the square-ring-shaped pot stand 10, the area of the square-ring-shaped pot stand 10 is larger, so it can provide a larger area for heating the cookware and has a higher thermal efficiency. The combustion chamber 11a is used for the flame of the burner 20 to pass through. Understandably, the pot stand 10 is mounted on the outer periphery of the burner 20, with the burner 20 arranged in the middle. The pot stand 10 can provide stable support for the cookware, and the flame of the burner 20 can directly act on the bottom of the cookware to provide heat energy for the cookware.

[0057] As Figure 2 and Figure 3 shown, the gas pipe 40 connects to an external gas source and the mixing chamber 20a. The gas pipe 40 is used to supply gas to the mixing chamber 20a, that is, the gas pipe 40 transports gas from the external gas source to the mixing chamber 20a of the burner 20. The gas pipe 40 can be made of a multi-layer structure, including a plastic hose, a metal-wound pipe, and a flame-retardant and corrosion-resistant polyvinyl chloride (PVC) protective sleeve, which can provide good flame-retardant and corrosion-resistant effects. To ensure that the gas pipe 40 can safely and stably transport gas during long-term use.

[0058] Although the pot stand 10 has a certain effect of concentrating heat, it still cannot collect all the high-temperature flue gas within the pot stand 10. This causes a large amount of high-temperature flue gas to be dissipated to the outside during the combustion process, not only resulting in waste of heat energy but also reducing the overall thermal efficiency of the gas stove 1.

[0059] Please continue to refer to Figure 2 and Figure 3 , to solve the above problems, the gas stove 1 further includes a flue gas recovery device 12. The flue gas recovery device 12 has a smoke suction port 121a and a smoke delivery channel 122a that are connected. The pot stand 10 has an upper surface 111a facing the cookware. It should be noted that this upper surface 111a plays a certain role in heat conduction. The upper surface 111a is arranged roughly opposite the bottom of the cookware and can assist in heating the cookware through heat radiation. The upper surface 111a also has a multi-ring annular groove structure, which helps to guide the flow direction of the flue gas, causing the flue gas to converge on the upper surface 111a of the pot stand 10 and extending the contact time between the flue gas and the bottom of the cookware.

[0060] Part of the flue gas recovery device 12 with the smoke suction port 121a is located on the upper surface 111a or on the outer periphery of the pot rack 10 and at least partially protrudes upward from the upper surface 111a. Specifically, in one configuration, the part of the flue gas recovery device 12 with the smoke suction port 121a is located on the upper surface 111a of the pot rack 10, which can reduce the mixing of high-temperature flue gas with the outside air before reaching the smoke suction port 121a, thereby increasing the temperature of the recovered flue gas and enhancing the preheating effect. And the part with the smoke suction port 121a located on the upper surface 111a of the pot rack 10 makes the structure between the flue gas recovery device 12 and the pot rack 10 more compact, saves space, and is suitable for installation in a kitchen environment with limited space. In another configuration, the part of the flue gas recovery device 12 with the smoke suction port 121a is located on the outer periphery of the pot rack 10 and at least partially protrudes upward from the upper surface 111a of the pot rack 10. This configuration enables the smoke suction port 121a to collect the dissipated high-temperature flue gas from the outer peripheral side of the pot rack 10, and the range of the collected flue gas is larger. It can not only collect the flue gas dissipated from the edge of the cooking utensil but also collect the flue gas dissipated from around the pot rack 10, improving the recovery range of the flue gas. The appropriate configuration can be selected according to the actual usage requirements.

[0061] Whether the part with the smoke suction port 121a is located on the upper surface 111a or on the outer periphery of the pot rack 10 and at least partially protrudes upward from the upper surface 111a, the smoke suction port 121a can directly contact the high-temperature flue gas generated during the combustion process, thereby effectively recovering it, that is, the smoke suction port 121a is used to collect the flue gas. And the smoke delivery channel 122a is connected to the gas burner pipe 40. Understandably, the smoke delivery channel 122a is a channel connecting the smoke suction port 121a and the gas burner pipe 40. Due to the setting of the smoke suction port 121a close to the upper surface 111a of the pot rack 10, and the mixing chamber 20a is located below the burner 20, and the gas burner pipe 40 is usually connected to the lower part of the burner 20. Therefore, the smoke delivery channel 122a extends at least partially downward from the position where it connects to the smoke suction port 121a, reducing the circuitous setting of the smoke delivery channel 122a, shortening the delivery path of the flue gas, enabling the flue gas to flow smoothly from the smoke suction port 121a to the gas burner pipe 40, and reducing the problems of flue gas accumulation or poor flow in the smoke delivery channel 122a. Ensure that the flue gas can quickly and efficiently enter the gas burner pipe 40 after entering the smoke delivery channel 122a, reducing the heat loss of the flue gas during the moving path, and helping to maintain the high-temperature state of the flue gas.

[0062] The function of the smoke delivery channel 122a is to transport the high-temperature flue gas inhaled through the smoke intake 121a into the gas pipe 40. By collecting the high-temperature flue gas through the smoke intake 121a, the loss of the high-temperature flue gas is reduced, and the recovery and utilization of the heat of the high-temperature flue gas are realized. After the high-temperature flue gas enters the gas pipe 40 through the smoke delivery channel 122a, it can preheat the gas, thereby increasing the temperature of the gas and reducing the heat input required during the combustion process. That is, when the gas enters the mixing chamber 20a and mixes with air, it is easier to reach the temperature conditions required for combustion, enabling it to burn more fully and stably during combustion, and thus improving the combustion efficiency.

[0063] Moreover, the flue gas will contain unburned gas components. The smoke intake 121a recovers the flue gas and enables it to participate in the combustion process again, which can improve the energy utilization rate.

[0064] As Figure 3 shown, in some embodiments, the pot stand 10 includes a pot stand body 11, upper support feet 14, and lower support feet 15. The pot stand body 11 has the above-mentioned combustion chamber 11a and upper surface 111a. The upper support feet 14 are connected to the upper surface 111a of the pot stand body 11 and are used to carry the cookware, preventing the cookware from sliding or tipping over during the heating process, reducing the occurrence of accidents, and ensuring the stability during the cooking process. The upper support feet 14 can be made of materials with high temperature resistance such as cast iron.

[0065] There are multiple upper support feet 14, and the multiple upper support feet 14 are arranged at intervals on the upper surface 111a of the pot stand body 11. The lower support feet 15 are connected to the pot stand body 11 and are located at the lower part of the pot stand body 11. The lower support feet 15 are used to provide support for the pot stand body 11. The connection methods of the upper support feet 14, lower support feet 15, and the pot stand body 11 include at least one of screwing, welding, riveting, and clamping, so as to form a firm connection. The lower support feet 15 enable the pot stand body 11 to be placed stably around the burner 20. Among them, the number of the lower support feet 15 is the same as that of the upper support feet 14, and they are arranged in one-to-one correspondence in the up-down direction, which can ensure that the supporting force of the pot stand body 11 is evenly distributed in the vertical direction, reducing the structural instability and shaking caused by the inconsistent positions of the upper support feet 14 and the lower support feet 15. The aligned upper support feet 14 and lower support feet 15 can more effectively transfer the weight of the cookware to the lower support feet 15, improving the overall load-bearing capacity of the pot stand body 11 and ensuring that the pot stand body 11 will not be deformed or damaged due to the weight of the cookware during use.

[0066] As Figure 3 and Figure 4As shown, in some embodiments, the pot stand 10 further includes a liquid receiving tray 13. The liquid receiving tray 13 is arranged in a ring shape and is detachably arranged around the circumference of the burner 20. The lower support feet 15 of the pot stand 10 are supported on the liquid receiving tray 13. The liquid receiving tray 13 can collect the liquids generated during the cooking process of the gas stove 1, such as soup, oil, etc., prevent the liquids from overflowing on a large scale, and keep the gas stove 1 clean and hygienic.

[0067] It should be noted that the liquid receiving tray 13 is arranged below the flame outlet side of the burner 20, which can prevent the flame of the burner 20 from directly contacting the liquid receiving tray 13, thereby avoiding the occurrence of safety accidents such as fires. The liquid receiving tray 13 can be removed for cleaning, improving the convenience of use.

[0068] Please continue to refer to Figure 3 and Figure 4 , in some embodiments, the pot stand body 11 includes an upper cover 111 and a lower cover 113. Both the upper cover 111 and the lower cover 113 are in a ring shape. The lower cover 113 is connected to the upper cover 111 and is located below the upper cover 111. The upper cover 111 has the above-mentioned upper surface 111a. An insulation cavity 11b is formed between the upper cover 111 and the lower cover 113. The insulation cavity 11b can reduce the heat transfer from the pot stand 10 to the external environment. This design is to reduce the heat loss and make more heat concentrate at the bottom of the cooking utensil. Further, heat insulation materials can also be filled in the insulation cavity 11b to enhance the heat insulation effect. The heat insulation materials can specifically be one of heat insulation cotton, aerogel, and foam plastic.

[0069] In other embodiments, the pot stand 10 further includes a middle cover (not shown in the figure). The middle cover is arranged between the upper cover 111 and the lower cover 113. The middle cover divides the insulation cavity 11b into a first cavity and a second cavity. The first cavity is arranged on the side of the middle cover facing the upper cover 111, and the second cavity is arranged on the side of the middle cover facing the lower cover 113. A heat insulation layer can be arranged on the surface of the middle cover. The heat insulation layer is used to reduce the heat transfer from the first cavity to the second cavity, so that the heat dissipation of the upper cover 111 is slower, and the upper cover 111 can be maintained at a higher temperature to improve the overall thermal efficiency of the gas stove 1.

[0070] Please continue to refer to Figure 3 and Figure 4, in some embodiments, the flue gas recovery device 12 includes a smoke collecting member 121 and a smoke delivery pipe 122. The smoke collecting member 121 has the above-mentioned smoke suction port 121a. The smoke collecting member 121 is located on the upper surface 111a of the pot rack 10 or is located outside the pot rack 10 and at least partially protrudes upward from the upper surface 111a of the pot rack 10. The smoke suction port 121a can be arranged on the part of the smoke collecting member 121 that protrudes from the upper surface 111a of the pot rack 10, reducing the interference or path of the recovered flue gas, so that the smoke suction port 121a is arranged at a position close to the flue gas source, and can collect more directly the high-temperature flue gas dissipated from the periphery of the pot rack 10, that is, the smoke collecting member 121 is used to collect the high-temperature flue gas dissipated from around the pot rack 10 and the cooking utensil.

[0071] One end of the smoke delivery pipe 122 is connected to the smoke collecting member 121 and extends in the direction of the gas supply pipe 40 to connect to the gas supply pipe 40, and has the above-mentioned smoke delivery channel 122a. The arrangement of the smoke delivery pipe 122 can reduce the heat loss of the high-temperature flue gas during the transportation process. And the smoke delivery pipe 122 is located outside the pot rack 10, which can reduce the interference between the smoke delivery pipe 122 and the pot rack 10, and reduce the occupation of the internal space of the pot rack 10.

[0072] In some embodiments, the smoke collecting member 121 may have a Venturi channel. The smoke suction port 121a is the inlet of the Venturi channel. Along the flow direction of the flue gas, the inlet part will gradually narrow, the flow velocity increases, and the pressure decreases. The Venturi channel also has a throat and an outlet part. The throat is the narrowest part, so that the flow velocity of the flue gas reaches the maximum, forming a negative pressure area, while the outlet part gradually widens and the pressure recovers. The outlet part can be connected to the smoke delivery pipe 122. The inlet part of the smoke collecting member 121 provided with the Venturi channel is arranged on the moving path of the high-temperature flue gas, so that the high-temperature flue gas can smoothly enter the inlet, and the high-temperature flue gas can be naturally sucked in by using the Venturi effect without an additional power device 124.

[0073] Wherein, both the smoke collecting member 121 and the smoke delivery pipe 122 are made of stainless steel, which can remain stable in a high-temperature environment, are not easily deformed or damaged. And they have good corrosion resistance and can resist the chemical components in the flue gas. The stainless steel smoke collecting member 121 and the stainless steel smoke delivery pipe 122 have relatively high mechanical strength, can withstand a certain amount of mechanical stress, and maintain the stability of the structure. Their surfaces are smooth, easy to clean and maintain, and can reduce the accumulation of dirt. In other embodiments, the smoke collecting member 121 and the smoke delivery pipe 122 can also be made of ceramic materials or high-temperature resistant plastics. This application does not limit this.

[0074] In some embodiments, the smoke collecting member 121 is annular, annularly arranged on the peripheral side wall of the upper cover 111 and at least partially protruding upward from the upper surface 111a. The smoke collecting member 121 can be welded to the peripheral side wall of the upper cover 111 to ensure the sealing of the connection between the smoke collecting member 121 and the upper cover 111, reduce the high-temperature smoke from overflowing through the gap between the smoke collecting member 121 and the upper cover 111, and reduce the heat loss. The smoke collecting member 121 is firmly connected to the upper cover 111, maintaining the stability of the structure during long-term use, reducing looseness or damage caused by vibration or external force, and can also reduce the noise generated by unstable connection during use.

[0075] like Figure 4 As shown, specifically, a plurality of inhalation ports 121a may be provided, and the plurality of inhalation ports 121a are spaced and evenly arranged along the circumference of the smoke collecting member 121, so as to more comprehensively collect the high-temperature smoke lost from around the pot rack 10. This design enables the smoke to be effectively sucked into the inhalation port 121a regardless of the direction from which the smoke is lost, thereby reducing the leakage of smoke. It can be understood that the smoke collecting member 121 is a hollow annular tube structure, and the smoke can flow freely inside it. The smoke delivery pipe 122 is connected to one side of the smoke collecting member 121. The high-temperature smoke entering from the inhalation port 121a converges in the smoke collecting member 121 and flows into the smoke delivery channel 122a, and is finally delivered to the gas pipe 40 to preheat the gas.

[0076] Furthermore, in some embodiments, a plurality of inhalation ports 121a are located on the side of the smoke collecting member 121 facing the combustion chamber 11a. Specifically, the axial direction of the inhalation ports 121a is perpendicular to the axial direction of the combustion chamber 11a, so that the inhalation ports 121a are closer to the source of the high-temperature smoke, and the inhalation ports 121a can more directly collect the high-temperature smoke lost from around the pot rack 10. The high-temperature smoke has a shorter contact time with the external environment before being sucked into the inhalation ports 121a, reducing heat loss.

[0077] In other embodiments, the axial direction of the smoking port 121a may also be set at an angle to the axial direction of the combustion chamber 11a, but it will not be set on the side of the smoke collecting piece 121 away from the combustion chamber 11a. The axial angle between it and the combustion chamber 11a can be set according to needs. Assuming that the smoking port 121a is set on the side of the smoke collecting piece 121 away from the combustion chamber 11a, the movement path of the smoke is increased, and the contact time of the smoke with the external environment is prolonged, resulting in more heat loss.

[0078] In some embodiments, the smoking port 121a is located above the upper surface 111a. It should be noted that the smoke collecting member 121 at least partially protrudes upward from the upper surface 111a, but the height of the protruding part is still lower than the top of the upper support leg 14. The smoke collecting member 121 can effectively collect the high-temperature flue gas and will not interfere with the bottom of the cooking utensil. The smoking port 121a is arranged on the part of the smoke collecting member 121 that protrudes from the upper surface 111a, so that the smoking port 121a can be closer to the dissipation path of the flue gas and collect the flue gas dissipated from the edge of the pot rack 10 more comprehensively.

[0079] In some embodiments, the inner diameter of the smoke collecting member 121 is D1, and the outer diameter of the upper layer cover 111 is D2. D1 and D2 satisfy: 0 ≤ D1 - D2 ≤ 20 mm. The smoke collecting member 121 can be closely arranged around the upper layer cover 111. A smaller gap can reduce the leakage of flue gas from the gap between the smoke collecting member 121 and the upper layer cover 111, ensuring that more flue gas can be effectively collected and conveyed to the gas pipe 40. If the difference between the inner diameter of the smoke collecting member 121 and the outer diameter of the upper layer cover 111 is too large, for example, greater than 2 cm, this will cause more flue gas to leak from the gap, reducing the recovery efficiency of the flue gas. And the contact time of the flue gas with the external environment is longer before flowing to the smoking port 121a, resulting in the loss of heat of the high-temperature flue gas. If the inner diameter of the smoke collecting member 121 is smaller than the outer diameter of the upper layer cover 111, it will cause premature inhalation of high-temperature flue gas, and the high-temperature flue gas will be sucked away by the smoking port 121a before fully contacting the bottom of the cooking utensil. If the high-temperature flue gas is prematurely inhaled into the smoking port 121a, the heating time at the bottom of the cooking utensil will be reduced, resulting in a decrease in the heat transfer efficiency. Therefore, the inner diameter of the smoke collecting member 121 being larger than the outer diameter of the upper layer cover 111 can ensure that the high-temperature flue gas has enough time to fully contact the bottom of the cooking utensil.

[0080] As Figure 3 and Figure 4 As shown, to effectively drive the high-temperature flue gas to enter the smoke delivery channel 122a from the smoking port 121a, in some embodiments, the flue gas recovery device 12 further includes a power device 124. The power device 124 is arranged in the smoke delivery pipe 122. The power device 124 is used to drive the flue gas and air near the smoking port 121a to be input into the gas pipe 40 through the smoke delivery channel 122a. Understandably, the power device 124 can generate negative pressure, so that the smoking port 121a can efficiently inhale the high-temperature flue gas and air, ensuring that the flue gas can smoothly enter the smoke delivery channel 122a and be conveyed to the gas pipe 40, increasing the speed of the flue gas entering the gas pipe 40 and reducing the heat loss of the flue gas during the conveying process.

[0081] Moreover, the power device 124 will generate negative pressure through the smoke delivery channel 122a. At this time, the pressure in the gas pipe 40 is usually higher than the pressure in the smoke delivery channel 122a, reducing the situation of gas flowing into the smoke delivery channel 122a.

[0082] It should be noted that the power device 124 sucks the air near the smoking port 121a and the high-temperature flue gas into the smoke delivery channel 122a together, so that the smoke delivery pipe 122 inputs primary air into the gas pipe 40 at the same time, enabling the air and gas to be preliminarily mixed before entering the mixing chamber 20a. That is, the mixing path of the gas and air is longer, and the two can be mixed more evenly. More uniform mixing helps the gas to burn more fully in the burner 20, reducing the unburned gas components and lowering the pollutant emissions. Moreover, the high-temperature flue gas can also preheat the temperature of the primary air, enabling the mixed gas to reach a higher temperature when entering the mixing chamber 20a, thereby improving the combustion efficiency.

[0083] Specifically, in this embodiment, the power device 124 can be a fan. The air inlet of the fan is arranged towards the connection part of the smoke collection ring and the smoke delivery pipe 122, and the air outlet of the fan is arranged towards the gas pipe 40. The fan can generate negative pressure through the rotating blades, thereby effectively sucking the high-temperature flue gas and air. Moreover, the fan can also control the flow rate of the inhaled air and high-temperature flue gas by adjusting its rotation speed. When the rotation speed of the fan increases, it can more quickly suck the air and high-temperature flue gas near the smoking port 121a, resulting in an increase in the flow rate of the air and high-temperature flue gas; conversely, when the rotation speed of the fan decreases, the flow rate of the air and high-temperature flue gas will also decrease accordingly. In other embodiments, the power device 124 can also be a vacuum pump, a Venturi tube or an electromagnetic pump.

[0084] In some embodiments, the smoke delivery pipe 122 also has an air suction port (not shown in the figure) communicating with the smoke delivery channel 122a. The air suction port is arranged on the pipe wall of the smoke delivery pipe 122, and along the flow direction of the flue gas in the smoke delivery channel 122a, the power device 124 is arranged downstream of the air suction port, which can effectively increase the inhaled air content and improve the air content in the mixed gas of air and high-temperature flue gas. Moreover, the inhaled air can be fully mixed with the high-temperature flue gas in advance and preheated by the high-temperature flue gas. Increasing the air content can reduce the fluctuations during the combustion process, making the combustion more stable. More uniform mixing can reduce the phenomenon of incomplete combustion, thereby reducing pollutant emissions.

[0085] In some embodiments, the flue gas recovery device 12 further includes a check valve (not shown in the figure). The check valve is arranged in the smoke delivery pipe 122, and the valve of the check valve is arranged towards the direction of the gas pipe 40, which is used to block the gas in the gas pipe 40 from flowing through the smoke delivery pipe 122 into the smoke collection member 121, ensuring that the mixed gas of high-temperature flue gas and air can flow unidirectionally and preventing the gas in the gas pipe 40 from flowing into the smoke collection member 121. This improves the safety of using the gas stove 1. If the gas overflows from the smoking port 121a, it will cause combustion leakage.

[0086] In some embodiments, the flue gas recovery device 12 further includes a filter element (not shown in the figure). The filter element is detachably connected to the smoke delivery pipe 122. The detachable filter element can be replaced and cleaned regularly, which is convenient for users to maintain. And a part of the filter element is located in the smoke delivery channel 122a. The filter element is used to filter the flue gas flowing towards the gas pipe 40. Particles and impurities in the flue gas may accumulate in the gas pipe 40, resulting in blockage of the gas pipe 40. By setting the filter element, these particles can be effectively removed to prevent the gas pipe 40 from being blocked. Setting the filter element can provide purer preheated gas to the gas pipe 40, which helps to improve the preheating efficiency of the gas and further optimize the combustion process.

[0087] Specifically, the filter element can be a multi-stage filter element to improve the filtering effect. For example, the first-stage filter can remove large particles, and the second-stage filter can remove harmful gases. Further, regarding the method of detachably connecting the filter element to the smoke delivery pipe 122, the smoke delivery pipe 122 can be a multi-segment structure, that is, it includes at least two smoke delivery sub-segments. The filter element is connected between the two smoke delivery sub-segments. At least the two ends of the filter element have external threads, and the smoke delivery sub-segment connected to the end of the filter element has internal threads. Through the threaded connection method, a part of the filter element is located in the smoke delivery channel 122a to filter the flowing flue gas.

[0088] As Figure 4 shown, in some embodiments, the burner 20 includes a base 23, a burner cap 21 and a gas distributor 22. The function of the base 23 is to mix the gas and the primary air. The gas distributor 22 is arranged between the base 23 and the burner cap 21 to play a role in distributing the gas. And a plurality of flame holes are provided on the burner cap 21 for distributing the mixed gas to each flame hole. The base 23 and the burner cap 21 can be made of aluminum alloy, and the surfaces of both are subjected to anodic oxidation treatment to improve the corrosion resistance of the base 23 and the burner cap 21 and protect the base 23 and the burner cap 21 stably for a long time.

[0089] As Figure 3 and Figure 4, the premixing chamber 20a includes a first premixing chamber 20a1 and a second premixing chamber 20a2. The base 23 includes a base body 231 and an ejector tube 30. The base body 231 is connected to and communicates with the ejector tube 30. The base body 231 and the ejector tube 30 can be an integral component. The end of the ejector tube 30 facing away from the base body 231 is connected to a gas pipe 40. The burner head 22 is arranged on the upper side of the base body 231. The ejector tube 30 communicates with the burner cap 21 through the burner head 22. The burner head 22 has a central burner cap seat and an outer ring gas chamber. The burner cap 21 includes a central burner cap 211 and an outer burner cap 212. The central burner cap 211 is located at the center of the burner 20 and covers the burner head 22, and together with the burner head 22, it constructs the first premixing chamber 20a1. Specifically, the central burner cap 211 covers the central burner cap seat. The first premixing chamber 20a1 provides the mixed gas required for the combustion of the inner flame. The outer burner cap 212 is arranged at an interval outside the central burner cap 211. The outer burner cap 212 surrounds the central burner cap 211 and, together with the burner head 22, constructs the second premixing chamber 20a2. Specifically, the outer burner cap 212 covers the outer ring gas chamber. The second premixing chamber 20a2 provides the mixed gas required for the combustion of the outer flame. The outer flame is ejected and burned through the outer ring flame holes on the outer burner cap 212.

[0090] The gas pipe 40 includes an inner gas pipe 41 and an outer gas pipe 42. The inner gas pipe 41 communicates with the first premixing chamber 20a1 and is used to transport gas to the central burner cap 211, mainly responsible for the combustion of the inner flame, which is usually used to provide high-temperature concentrated heating. The outer gas pipe 42 communicates with the second premixing chamber 20a2 and is used to transport gas to the outer burner cap 212, mainly responsible for the combustion of the outer flame, which is usually used to provide a wider heating area.

[0091] In one setting, a valve can be respectively arranged on the inner gas pipe 41 and the outer gas pipe 42. The valve can be used to control the gas flow rate flowing into the first premixing chamber 20a1 or the second premixing chamber 20a2, that is, by adjusting the opening degree of the valve, the size of the inner flame or the outer flame can be independently adjusted, providing more flexible cooking options.

[0092] Among them, the smoke delivery pipe 122 is connected and communicated with at least one of the internal combustion gas pipe 41 and the external combustion gas pipe 42. Understandably, the smoke delivery pipe 122 can be only connected and communicated with the internal combustion gas pipe 41, and directly convey the recovered high-temperature flue gas and air mixture to the internal combustion gas pipe 41, which is specifically used to preheat the gas required for the internal flame, and can improve the combustion efficiency of the internal flame, making it more suitable for rapid temperature rise or high-temperature cooking. Or, the smoke delivery pipe 122 can be only connected and communicated with the external combustion gas pipe 42, and directly convey the recovered high-temperature flue gas and air mixture to the external combustion gas pipe 42, which is specifically used to preheat the gas required for the external flame, thereby improving the combustion efficiency of the external flame and making it more suitable for slow cooking or uniform heating. Or, the recovered high-temperature flue gas and air mixture are simultaneously conveyed to the internal combustion gas pipe 41 and the external combustion gas pipe 42, so that both the internal flame and the external flame can benefit from the preheating. This design can comprehensively improve the combustion efficiency and optimize the entire combustion process. It can be set according to actual needs.

[0093] Please continue to refer to Figure 3 and Figure 4 , in some embodiments, the smoke delivery pipe 122 is configured to be connected and communicated with the internal combustion gas pipe 41 and the external combustion gas pipe 42. The internal combustion gas pipe 41 and the external combustion gas pipe 42 can be arranged side by side. Specifically, the smoke delivery pipe 122 includes a smoke delivery main pipe 1221 and two smoke delivery branch pipes 1222. The smoke delivery main pipe 1221 is connected and communicated with the smoke collecting member 121. The smoke delivery main pipe 1221 can centrally convey the high-temperature flue gas and air mixture collected from the smoke collecting member 121, and the two smoke delivery branch pipes 1222 are both connected and communicated with the smoke delivery main pipe 1221. The two smoke delivery branch pipes 1222 are arranged at an angle and are respectively communicated with the internal combustion gas pipe 41 and the external combustion gas pipe 42. The smoke delivery main pipe 1221 is connected to the two smoke delivery branch pipes 1222 in a "Y" shape. The two smoke delivery branch pipes 1222 can distribute the flue gas and air mixture in the smoke delivery main pipe 1221 to the internal combustion gas pipe 41 and the external combustion gas pipe 42.

[0094] It should be noted that the diameters of the two smoke delivery branch pipes 1222 can be the same or different. If the diameters of the two smoke delivery branch pipes 1222 are different, that is, the volumes of the mixture gas entering the internal combustion gas pipe 41 and the external combustion gas pipe 42 are different, it can be set according to requirements. If the diameters of the two smoke delivery branch pipes 1222 are the same, the mixture gas can be evenly distributed to the internal combustion gas pipe 41 and the external combustion gas pipe 42.

[0095] Among them, the smoke delivery main pipe 1221 and the two smoke delivery branch pipes 1222 are integrally formed, reducing the connection points between the smoke delivery main pipe 1221 and the two smoke delivery branch pipes 1222, thereby reducing the risk of gas leakage in the smoke delivery channel 122a caused by loosening or damage at the connection. The integrally formed structure is stronger, reducing deformation or damage caused by external forces. It also reduces the assembly difficulty and reduces complex assembly steps such as welding and threaded connection, thereby improving the assembly efficiency of the flue gas recovery device 12.

[0096] As Figure 4 shown, further, in the arrangement where the power device 124 is configured, the power device 124 can be arranged in the main smoke delivery pipe 1221, which can centrally drive the airflow of the entire smoke delivery pipe 122, so that the mixed gas of flue gas and air is effectively inhaled and accelerated before entering the branch smoke delivery pipes 1222, and further control the airflow speed and flow rate entering the internal combustion gas pipe 41 and the external combustion gas pipe 42. Arranging the power device 124 on the main smoke delivery pipe 1221 can also reduce the need to arrange an additional power device 124 on the branch smoke delivery pipes 1222.

[0097] As Figure 5 、 Figure 6 and Figure 7 shown, in some embodiments, the smoke delivery pipe 122 is connected to the ejector pipe 30. Understandably, the smoke delivery passage 122a connects the smoking port 121a and the ejector pipe 30. Since the ejector pipe 30 can generate negative pressure through the Venturi effect, air is inhaled and mixed with the fuel gas to form a mixed gas suitable for combustion. When the fuel gas passes through the narrow passage of the ejector pipe 30, the flow rate increases and the pressure decreases, thus generating a negative pressure area at the inlet of the ejector pipe 30. This negative pressure area attracts the surrounding air to enter the ejector pipe 30 and mixes with the fuel gas to form a mixed gas. The ejector pipe 30 is connected to the gas mixing chamber 20a and can transport the air and the fuel gas to the gas mixing chamber 20a. Therefore, directly connecting the smoke delivery pipe 122 to the ejector pipe 30 can preheat the fuel gas and air in the ejector pipe 30. The temperature of the preheated mixed gas of fuel gas and air increases, and the combustion reaction speed accelerates, thereby improving the combustion efficiency. Moreover, the preheated mixed gas burns more stably, reducing the fluctuations during the combustion process and improving the combustion stability. And the flue gas will contain unburned fuel gas components. The smoking port 121a recovers the flue gas and enables it to participate in the combustion process again, which can improve the energy utilization rate.

[0098] As Figure 5 and Figure 6As shown, in some embodiments, the ejector tube 30 includes an ejector section 33 and a mixing section 34. The ejector section 33 belongs to the front end part of the ejector tube 30. The ejector section 33 has a Venturi channel, that is, the middle part of the ejector section 33 is narrow and the two ends are wider. When the gas passes through the narrow part, the flow rate increases and the pressure decreases, thus generating a negative pressure. The ejector section 33 is used to accelerate the ejection of the gas to generate a low-pressure area and attract the surrounding primary air to enter. Along the flow direction of the gas, the mixing section 34 is connected to the downstream of the ejector section 33. The mixing section 34 is used to mix the gas and the primary air. The mixing section 34 can be a relatively long pipe, and vortex plates or turbulence generating vanes can be arranged inside to increase the turbulence of the gas and further promote the mixing of the gas and the air. The outlet of the mixing section 34 is connected to the gas mixing chamber 20a to transport the mixed gas to the burner 20.

[0099] Among them, the smoke delivery pipe 122 is connected to at least one of the mixing section 34 and the ejector section 33. Understandably, the smoke delivery pipe 122 can be only connected to the mixing section 34 to preheat the gas and air during the mixing process, increase the temperature of the mixed gas, accelerate the combustion reaction rate, make the preheated mixed gas burn more fully, and reduce the possibility of incomplete combustion. The smoke delivery pipe 122 can also be only connected to the ejector section 33. That is to say, the high-temperature flue gas in the smoke delivery channel 122a can be accelerated when passing through the Venturi channel, increasing the kinetic energy of the high-temperature flue gas. The inflow speed and efficiency of the high-temperature flue gas are higher, enabling it to enter the inside of the ejector tube 30 more quickly and mix fully with the gas and the air. And because it is connected to the front section of the ejector tube 30, its moving path is longer, that is, the mixing time of the gas and the air is more, and a more uniform mixed gas is further obtained, further optimizing the combustion conditions, making the mixed gas more stable during combustion, and being able to more comprehensively optimize the combustion process. The smoke delivery pipe 122 is connected to both the mixing section 34 and the ejector section 33, combining the advantages of the above two connection methods, enabling a more efficient and optimized combustion process, and the distribution ratio of the high-temperature flue gas can be adjusted according to different combustion requirements, which will not be elaborated here.

[0100] As Figure 7 As shown, in some embodiments, the flue gas recovery device 12 further includes a gas supplementing member 123. The gas supplementing member 123 is located below the pot rack 10 and is connected to the smoke delivery pipe 122. The gas supplementing member 123 has a first gas supplementing port 123a facing the combustion chamber 11a. The first gas supplementing port 123a is communicated with the smoke delivery channel 122a so that the flue gas flowing out from the first gas supplementing port 123a preheats the secondary air flowing towards the combustion chamber 11a, can significantly increase the temperature of the secondary air, reduce the temperature difference during the combustion process, and the preheated air can more effectively participate in the combustion process, making the combustion more uniform and stable, reducing the phenomenon of incomplete combustion, and improving the combustion efficiency.

[0101] In an embodiment configured with the power device 124, the power device 124 can not only drive the flue gas and air mixture into the gas pipe 40, but also transport the suctioned high-temperature flue gas and entrained air to the position of the outer ring fire holes of the burner 20, supplementing preheated secondary air for the burner 20, reducing the heat dissipation loss of the high-temperature flue gas, and improving the thermal efficiency.

[0102] As Figure 7 and Figure 8 shown, specifically, the air supplementing member 123 satisfies at least one of the following conditions:

[0103] The air supplementing member 123 is annular and can surround the burner 20. There are multiple first air supplementing ports 123a, and the multiple first air supplementing ports 123a are arranged at intervals on the side of the air supplementing member 123 facing the combustion chamber 11a, and can evenly supplement the preheated secondary air into the outer fire holes of the burner 20 from the circumferential direction of the combustion chamber 11a, ensuring a more stable and efficient combustion process and reducing the phenomenon of uneven local temperature in the combustion chamber 11a. This makes the combustion of the burner 20 more complete and reduces the situation of incomplete combustion;

[0104] The air supplementing member 123 is a stainless steel air supplementing member 123 or a ceramic air supplementing member 123 to ensure its long-term stable operation in an environment where it contacts high-temperature flue gas;

[0105] The diameter of the air supplementing member 123 is greater than the inner diameter of the pot support 10. The inner diameter of the pot support 10 refers to the diameter of the combustion chamber 11a formed by the pot support body 11, ensuring that the air supplementing member 123 covers a wider area, enabling the preheated air to be more evenly distributed into the combustion chamber 11a without interfering with the burner 20 and hindering the rise of the flame of the burner 20;

[0106] The air supplementing member 123 is connected to the lower surface 113a of the pot support 10, that is, connected to the lower surface 113a of the lower layer cover 113, closer to the position of the outer fire holes of the burner 20, ensuring that the preheated air directly enters the combustion area. Specifically, the air supplementing member 123 can be fixed to the lower surface 113a of the pot support 10 by means of welding, screwing, buckling, etc., to ensure the stability of its position.

[0107] As Figure 9 shown, in some embodiments, the air supplementing member 123 includes a ring body 1231 and a plurality of air supplementing swirl members 1232. The ring body 1231 has an inner cavity 123b communicating with the smoke delivery channel 122a and the above-mentioned first air supplementing ports 123a. The plurality of air supplementing swirl members 1232 are arranged at intervals in the inner cavity 123b, and an air supplementing swirl channel 123c is formed between two adjacent air supplementing swirl members 1232. The air supplementing swirl channel 123c is used to change the flow direction of the secondary air in the inner cavity 123b so that the secondary air blown out from the first air supplementing ports 123a is arranged around the axis of the combustion chamber 11a.

[0108] Specifically, the air supplement swirl member 1232 may include an arc-shaped swirl plate disposed in the inner cavity 123b and extending in an arc shape, so that the air supplement swirl channel 123c is arc-shaped, thereby extending the movement path of the secondary air, and further improving the preset temperature of the secondary air, and further improving the overall thermal efficiency of the gas stove 1.

[0109] It can be understood that the air supplement swirl member 1232 may also include a flat swirl plate (not shown in the figure). The flat swirl plate is disposed in the inner cavity 123b, and the flat swirl plate is arranged at an angle with the radial direction of the combustion chamber 11a passing through itself. Similarly, the flow direction of the secondary air can be changed, so that the secondary air blown out from the air outlet is arranged around the axis of the combustion chamber 11a, thereby extending the movement path of the secondary air, and further improving the preset temperature of the secondary air, and further improving the overall thermal efficiency of the gas stove 1. It can be understood that the flat swirl plate is easier to process and manufacture, and the swirl effect of the arc-shaped swirl plate is better. In the embodiments of the present application, the specific form of the air supplement swirl member 1232 is not limited.

[0110] As Figure 10 shown, in some embodiments, the smoke delivery pipe 122 may also be directly connected to the gas mixing chamber 20a to deliver the high-temperature smoke inhaled by the smoke suction port 121a into the gas mixing chamber 20a, so as to mix the mixed gas in the gas mixing chamber 20a, thereby heating the mixed gas in the gas mixing chamber 20a, so as to preheat the temperature of the mixed gas to a preset temperature, accelerate the volatilization and mixing of the fuel, and further, when the mixed gas enters the combustion chamber for combustion, the combustion time of the fuel can be shortened, promoting a more complete oxidation reaction, and thus improving the overall thermal efficiency of the gas stove 1.

[0111] In the description of the present application, it should be understood that if there are terms such as "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for the convenience of describing the present 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 positional relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation of the present patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0112] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as implying or indicating relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0113] In the description of the present application, unless otherwise clearly specified or limited, terms such as "installed", "connected", "linked", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0114] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation.

[0115] The above content is only the specific implementation mode of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of changes or substitutions, which should all be covered by the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A gas stove, characterized in that, Comprising: A burner having a gas mixing chamber; A pot support, arranged in a ring and enclosing a combustion chamber for the flame of the burner to pass through, and the pot support further has an upper surface facing the cooking utensil; A gas pipe connected to the gas mixing chamber for supplying gas to the gas mixing chamber; and A flue gas recovery device having a smoke suction port and a smoke delivery channel connected to each other. The part of the flue gas recovery device having the smoke suction port is located on the upper surface or on the outer periphery of the pot support and at least partially protrudes upward from the upper surface for collecting flue gas, and the smoke delivery channel is connected to the gas pipe for delivering the flue gas sucked by the smoke suction port into the gas pipe.

2. The gas stove according to claim 1, characterized in that, The flue gas recovery device includes: A smoke collecting member having the smoke suction port, located on the upper surface or on the outer periphery of the pot support and at least partially protruding upward from the upper surface; and A smoke delivery pipe connected to the smoke collecting member and the gas pipe and having the smoke delivery channel, and the smoke delivery pipe is located outside the pot support.

3. The gas stove according to claim 2, characterized in that, The gas pipe includes an inner gas pipe and an outer gas pipe, and the gas mixing chamber includes a first gas mixing chamber and a second gas mixing chamber; the burner includes: A gas distributor; A central burner cap covering the gas distributor and defining the first gas mixing chamber with the gas distributor; and An outer burner cap spaced outside the central burner cap and defining the second gas mixing chamber with the gas distributor; Wherein, the inner gas pipe is connected and communicated with the first gas mixing chamber, the outer gas pipe is connected and communicated with the second gas mixing chamber, and the smoke delivery pipe is connected and communicated with at least one of the inner gas pipe and the outer gas pipe.

4. The gas stove according to claim 3, characterized in that, The smoke delivery pipe includes: A smoke delivery main pipe connected and communicated with the smoke collecting member; and Two smoke delivery branch pipes, both connected and communicated with the smoke delivery main pipe, and the two smoke delivery branch pipes are arranged at an angle and respectively connected and communicated with the inner gas pipe and the outer gas pipe.

5. The gas stove according to claim 2, characterized in that, The pot support includes: An upper layer cover having the upper surface; and A lower layer cover connected to the upper layer cover and located below the upper layer cover, and a heat insulation chamber is formed between the lower layer cover and the upper layer cover; Wherein, the smoke collecting member is annular, looped around the circumferential side wall of the upper layer cover and at least partially protruding upward from the upper surface, and a plurality of the smoke suction ports are provided, and the plurality of smoke suction ports are arranged at intervals along the circumferential direction of the smoke collecting member.

6. The gas stove according to claim 5, wherein The inner diameter of the smoke collecting member is D1, the outer diameter of the upper layer cover is D2, and D1 and D2 satisfy: 0≤D1 - D2≤20mm.

7. The gas stove according to claim 4, characterized in that, A plurality of the smoke suction ports are located on the side of the smoke collecting member facing the combustion chamber; and / or The smoke suction port is located above the upper surface.

8. The gas stove according to claim 4, characterized in that, The flue gas recovery device further includes: A power device arranged on the smoke delivery main pipe, and the power device is used for driving flue gas and air to enter the smoke delivery channel from the smoke suction port and input into the gas pipe.

9. The gas stove according to any one of claims 2-8, characterized in that, The flue gas recovery device further includes: An air supplementing member located on the lower side of the pot support and connected to the smoke delivery pipe, and the air supplementing member has a first air supplementing port facing the combustion chamber, and the first air supplementing port is connected and communicated with the smoke delivery channel so that the flue gas flowing out from the first air supplementing port preheats the secondary air flowing towards the combustion chamber.

10. The gas stove according to claim 9, characterized in that, The air supplementing component satisfies at least one of the following conditions: The air supplementing component is annular, and there are a plurality of first air supplementing ports. The plurality of first air supplementing ports are arranged at intervals on the side of the air supplementing component facing the combustion chamber; The diameter of the air supplementing component is greater than the inner diameter of the pot support; The air supplementing component is connected to the lower surface of the pot support.

11. The gas stove according to any one of claims 2-8, characterized in that, The flue gas recovery device further includes: A check valve is arranged in the smoke delivery pipe. The valve port of the check valve faces the direction of the gas pipe and is used to block the gas in the gas pipe from flowing through the smoke delivery pipe to the smoke collecting component.

12. The gas stove according to any one of claims 2-8, characterized in that, The flue gas recovery device further includes: A filter element is detachably connected to the smoke delivery pipe and is partially located in the smoke delivery channel. The filter element is used to filter the flue gas flowing towards the gas pipe.

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