Gas stove

Abstract

The embodiment of the invention discloses a gas stove which comprises a burner, a pot rack body and a smoke recovery device, and the burner is provided with a gas mixing chamber; the pot rack body 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 body is further provided with an upper surface used for facing a cooker; the smoke recovery device is provided with a smoke suction port and a smoke conveying channel which are communicated with each other, 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 rack body 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 mixing chamber. And the heating device is arranged in the gas mixing chamber and is used for conveying the smoke sucked by the smoke suction port into the gas mixing chamber so as to heat mixed gas in the gas mixing chamber, so that volatilization and mixing of fuel are accelerated, the combustion time of the fuel is shortened, a more sufficient oxidation reaction is promoted, and the overall heat efficiency of the gas stove can be improved.

Description

Technical Field

[0001] This application relates to the field of kitchen appliances, and more 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 heat-gathering plate can be in the form of a single layer, a double layer or multiple layers. 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 of combustion, so that the high-temperature flue gas of 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 technical field, since the pot rack cannot gather all the heat at the bottom of the cooking utensil, the flue gas is likely to escape between the cooking utensil and the pot rack, resulting in a relatively low overall thermal efficiency of the gas stove. Summary of the Invention

[0004] An embodiment of this application provides a gas stove, which aims to use a flue gas recovery device to suck high-temperature flue gas through a smoke suction port, so that the high-temperature flue gas enters the smoke delivery channel and is transported to the mixing chamber, where it mixes with the mixed gas in the mixing chamber, thereby being able to heat the mixed gas in the mixing chamber to accelerate the volatilization and mixing of the fuel. Furthermore, 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.

[0005] An embodiment of this application provides a gas stove, including a burner, a pot rack body, and a flue gas recovery device. The burner has a mixing chamber; the pot rack body is annularly arranged and encloses a combustion chamber for the flame of the burner to pass through, and the pot rack body also has an upper surface facing the cooking utensil; the flue gas recovery device has a smoke suction port and a smoke delivery channel connected to each other. The part of the flue gas recovery device with the smoke suction port is located on the upper surface or on the outer periphery of the pot rack body and at least partially protrudes upward from the upper surface for collecting flue gas, and the smoke delivery channel is communicated with the mixing chamber for transporting the flue gas sucked by the smoke suction port into the mixing chamber.

[0006] In some of these embodiments, the flue gas recovery device includes a smoke collecting member and a smoke delivery pipe. The smoke collecting member has the smoke suction port and is located on the upper surface or on the outer periphery of the pot rack body and at least partially protrudes upward from the upper surface; the smoke delivery pipe is communicated with the smoke collecting member to form the smoke delivery channel, and the smoke delivery pipe is communicated with the mixing chamber to supply primary air to the mixing chamber.

[0007] In some of these embodiments, the pot rack body includes an upper cover and a lower cover. The upper cover has the upper surface. The lower cover is connected to the upper cover and is located below the upper cover. An insulating cavity is formed between the lower cover and the upper cover. Among them, the smoke collecting member is annular and is disposed around the circumferential side wall of the upper cover and at least partially protrudes upward from the upper surface. There are multiple smoking ports, and the multiple smoking ports are arranged at intervals along the circumference of the smoke collecting member.

[0008] In some of these embodiments, the inner diameter of the smoke collecting member is D1, the outer diameter of the upper cover is D2, and D1 and D2 satisfy: 0 ≤ D1 - D2 ≤ 20 mm.

[0009] In some of these embodiments, the smoking ports are horizontally oriented towards the central axis of the pot rack body, or the smoking ports are oriented upwards, or the smoking ports are inclined upwards towards the central axis of the pot rack body.

[0010] In some of these embodiments, the flue gas recovery device further includes an air supplementing member. The air supplementing member is connected to the lower surface of the pot rack body and is communicated with one end of the smoke delivery pipe away from the smoke collecting member. The air supplementing member is disposed around the circumference of the combustion cavity and has a plurality of the first air supplementing ports oriented towards the combustion cavity.

[0011] In some of these embodiments, the air flow direction of the flue gas sent out from the first air supplementing port is perpendicular to the axial direction of the combustion cavity or is arranged around the axial direction of the combustion cavity.

[0012] In some of these embodiments, the air supplementing member includes an annular body and a swirl member. The annular body has the first air supplementing ports and an inner cavity. The inner cavity communicates with the smoke delivery pipe and the first air supplementing ports. The swirl member is disposed at intervals in the inner cavity. A swirl channel is formed between adjacent two swirl members. The swirl channel is used to change the flow direction of the secondary air in the inner cavity so that the flue gas sent out from the first air supplementing port is arranged around the axial direction of the combustion cavity.

[0013] In some of these embodiments, the swirl member includes an arc-shaped swirl plate which is disposed in the inner cavity and extends in an arc shape; and / or; the swirl member includes a planar swirl plate which is disposed in the inner cavity and the planar swirl plate is arranged at an angle with the radial direction of the combustion cavity passing through itself.

[0014] In some of these embodiments, the smoke delivery pipe further has an air suction port communicated with the smoke delivery channel.

[0015] In some of these embodiments, the flue gas recovery device further includes a check valve disposed in the smoke delivery pipe. The valve port of the check valve is oriented towards the mixing chamber and is configured to prevent the gas in the mixing chamber from flowing through the smoke delivery pipe to the smoke collecting member.

[0016] In some of these embodiments, the flue gas recovery device further includes a filter member detachably connected to the smoke delivery pipe and partially located within the smoke delivery channel. The filter member is configured to filter the flue gas flowing towards the mixing chamber.

[0017] In some of these embodiments, the flue gas recovery device further includes a power device disposed on the smoke delivery channel and in communication with the smoke delivery channel, configured to drive the flue gas at the smoking port to flow through the smoke delivery channel towards the mixing chamber.

[0018] Based on the gas stove of the present application, the flue gas recovery device can suck high-temperature flue gas through the smoking port, so that the high-temperature flue gas enters the smoke delivery channel and is transported to the mixing chamber to mix with the mixed gas in the mixing chamber. Thereby, the mixed gas in the mixing chamber can be heated to accelerate the volatilization and mixing of the fuel. Furthermore, 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] 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 for 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 skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0020] Figure 1 It is a schematic structural diagram of a gas stove in an embodiment of the present application;

[0021] Figure 2 It is a schematic assembly structure diagram of a pot support and a burner in an embodiment of the present application;

[0022] Figure 3 It is a schematic structural diagram of a flue gas recovery device in an embodiment of the present application;

[0023] Figure 4 It is a schematic assembly structure diagram of a pot support and a burner in another embodiment of the present application;

[0024] Figure 5 It is a schematic structural diagram of a flue gas recovery device in another embodiment of the present application;

[0025] Figure 6Schematic diagram of the air supplement component in an embodiment of the present application;

[0026] Figure 7 Schematic diagram of the assembly structure of the pot support and the burner in another embodiment of the present application;

[0027] Figure 8 Schematic diagram of the assembly structure of the pot support and the burner in yet another embodiment of the present application;

[0028] Figure 9 Schematic diagram of the structure of the flue gas recovery device in yet another embodiment of the present application.

[0029] Explanation of reference numerals: 1, gas stove; 10, pot support; 11, pot support body; 11a, combustion chamber; 111, upper cover; 111a, upper surface; 113, lower cover; 12, flue gas recovery device; 121, smoke collection member; 121a, smoke suction port; 122, smoke delivery pipe; 122a, smoke delivery channel; 122b, air suction inlet; 122c, second air supplement port; 123, air supplement component; 1231, ring body; 123a, first air supplement port; 123b, inner cavity; 1232, swirl member; 123c, swirl channel; 124, power device; 1241, fan; 20, burner; 20a, gas mixing chamber; 30, ejector pipe. Detailed implementation manners

[0030] In order to make the objectives, technical solutions and advantages of the present application clearer and more understandable, 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.

[0031] Please refer to Figure 1 , an embodiment of the present application provides a gas stove 1. In the embodiment of the present application, the gas stove 1 includes a pot support 10 and a burner 20. Among them, the pot support 10 is used to be placed on a stove top (not shown in the figure) and is used to support cooking utensils, prevent the cooking utensils from sliding or tipping during the heating process, reduce the occurrence of accidental injuries, and ensure the stability of the cooking process.

[0032] The pot support 10 surrounds the outside of the burner 20 and forms a combustion chamber 11a. In this way, the flame generated by the burner 20 during operation will pass through the combustion chamber 11a to contact the bottom of the cooking utensil, realizing the heating of the cooking utensil. And under the surrounding of the pot support 10, the heat of the burner 20 can be concentrated and transmitted towards the bottom direction of the cooking utensil, blocking the heat from leaking out. Furthermore, the heat of the flame generated by the burner 20 can fully act on the cooking utensil, so as to improve the thermal efficiency of the burner 20.

[0033] It can be understood that the pot stand 10 has an annular structure with a combustion chamber 11a at the central position. Of course, according to actual needs, the pot stand 10 can also be a square ring or other shapes; the combustion chamber 11a can also be a circular hole, a square hole or other shaped holes. In the embodiments of the present application, the shape of the whole pot stand 10 and the shape of the combustion chamber 11a are not specifically limited.

[0034] In the related art, since the pot stand 10 cannot gather all the heat at the bottom of the cooking utensil, it causes the flue gas to easily escape between the cooking utensil and the pot stand 10, resulting in a relatively low overall thermal efficiency of the gas stove 1.

[0035] Based on the above problems, please refer to Figure 1 and Figure 2 , the pot stand 10 includes a pot stand body 11 and a flue gas recovery device 12.

[0036] The pot stand body 11 is arranged in a ring shape and encloses to form a combustion chamber 11a. The pot stand body 11 also has an upper surface 111a for facing the cooking utensil.

[0037] The flue gas recovery device 12 is connected to the pot stand body 11 and has a smoke delivery channel 122a, a smoke suction port 121a and a first air supplement port 123a communicated with the smoke delivery channel 122a. The smoke suction port 121a is used to collect the high-temperature flue gas between the pot stand 10 and the cooking utensil. The high-temperature flue gas can enter the smoke delivery channel 122a and is transported to the combustion chamber 11a through the first air supplement port 123a.

[0038] In the embodiments of the present application, the flue gas recovery device 12 can suck the high-temperature flue gas through the smoke suction port 121a, so that the high-temperature flue gas enters the smoke delivery channel 122a and is transported to the combustion chamber 11a through the first air supplement port 123a, enabling the high-temperature flue gas to enter the combustion chamber 11a to heat the air in the combustion chamber 11a, reducing the energy consumption required for the burner 20 to heat the cold air. And because the temperature of the air in the combustion chamber 11a increases, it can make the fuel burn more fully, improve the thermal efficiency of fuel combustion, and thus achieve the purpose of sucking and recycling the high-temperature flue gas, reducing the heat loss of exhaust gas, and enhancing the overall thermal efficiency of the gas stove 1.

[0039] And since the smoking port 121a sucks in the surrounding air while recovering the flue gas, the mixed gas of high-temperature flue gas and air is supplemented into the combustion chamber 11a as secondary air, which can increase the air content in the combustion chamber 11a, thereby providing additional oxygen for combustion, promoting more complete combustion of the fuel, reducing the generation of incomplete combustion products such as carbon monoxide and hydrocarbons, reducing the generation of residues such as unburned carbon particles (black smoke) and tar, reducing PM2.5 / PM10 emissions, and improving air quality. Further, since the generation of residues such as unburned carbon particles (black smoke) and tar can be reduced, the probability of residues clogging components such as the burner 20 and the flue can be reduced, the equipment maintenance cycle can be extended, the maintenance cost of users can be reduced, and the user experience can be improved.

[0040] Please refer to Figure 1 and Figure 2 In one embodiment, the flue gas recovery device 12 further includes a power device 124. The power device 124 is disposed on the smoke delivery channel 122a and communicates with the smoke delivery channel 122a for driving the flue gas at the smoking port 121a to flow through the smoke delivery channel 122a to the first air supplement port 123a.

[0041] By driving the gas in the smoke delivery channel 122a to move from the smoking port 121a to the first air supplement port 123a through the power device 124, a negative pressure can be formed at the smoking port 121a, and then the smoking port 121a can be used to suck in the flue gas. Then, the flue gas flows through the smoke delivery channel 122a to the first air supplement port 123a and enters the combustion chamber 11a. By using the power device 124 to drive the flue gas to overcome gravity and pipeline resistance and enter the combustion chamber 11a, the waste heat recovery efficiency is improved, and thus the overall thermal efficiency of the gas stove 1 is improved. It can be understood that the power device 124 includes at least one of a fan 1241, a vacuum pump, a Venturi tube, or an electromagnetic pump. In other embodiments, the power device 124 can also be in other forms. In the embodiments of the present application, the specific form of the power device 124 is not limited.

[0042] It can be understood that in other embodiments, the working state of the power device 124 can be controlled by frequency conversion to match different cooking requirements. For example, when stir-frying with high heat, the power device 124 is controlled to work at high power, thereby increasing the suction force of the smoking port 121a and improving the efficiency of recovering high-temperature flue gas; while when simmering over low heat, in order to reduce the energy consumption of the power device 124, the power device 124 can be controlled to work at low power to maintain the basic circulation of the flue gas from the smoke delivery channel 122a to the combustion chamber 11a.

[0043] Please refer to Figures 1-3, in some embodiments, to facilitate the flue gas recovery device 12 to suck air, the smoke delivery pipe 122 further has an air suction port 122b communicating with the smoke delivery channel 122a, so that the smoke delivery pipe 122 can additionally suck air to increase the air content in the flue gas, thereby increasing the oxygen content of the high-temperature flue gas supplemented into the combustion chamber 11a, promoting more complete combustion of the fuel, reducing the generation of incomplete combustion products such as carbon monoxide and hydrocarbons, reducing the generation of residues such as unburned carbon particles (black smoke) and tar, reducing PM2.5 / PM10 emissions, and improving air quality. It can be understood that the air suction port 122b can be opened above the air inlet of the power device 124, so as to ensure that air can be sucked synchronously through the air suction port 122b when transporting flue gas, and the air and flue gas can be evenly mixed in the smoke delivery channel 122a.

[0044] Please refer to Figures 1-3 , 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 in the direction of the gas pipe, and is used to block the gas in the gas pipe from flowing into the smoke collecting member 121 through the smoke delivery pipe 122, ensuring that the high-temperature flue gas and air mixture can flow unidirectionally and preventing the gas in the gas pipe from flowing into the smoke collecting member 121. The safety of using the gas stove 1 is improved. If the gas overflows from the smoke suction port 121a, it will cause combustion leakage.

[0045] Please refer to Figures 1-3 , 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. Particles and impurities in the flue gas may accumulate in the gas pipe, resulting in blockage of the gas pipe. The setting of the filter element can effectively remove these particles and prevent the gas pipe from being blocked. The setting of the filter element can provide purer preheated gas to the gas pipe, which helps to improve the preheating efficiency of the gas and further optimize the combustion process.

[0046] 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-section structure, that is, it includes at least two smoke delivery sub-sections. The filter element is connected between the two smoke delivery sub-sections. At least two ends of the filter element have external threads, and the smoke delivery sub-section 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.

[0047] Please refer toFigures 1-3 In order to facilitate the collection of high-temperature flue gas by the smoke suction port 121a, the pot rack body 11 further has an upper surface 111a facing the cooking utensil. The part of the flue gas recovery device 12 having the smoke suction port 121a is located on the upper surface 111a or on the outer periphery of the pot rack body 11 and at least partially protrudes upward from the upper surface 111a, so that the smoke suction port 121a can be fully close to the flue gas and close to the cooking utensil, facilitating the smoke suction port 121a to recover high-temperature flue gas, thereby further reducing the heat loss of smoke exhaust and improving the overall thermal efficiency of the gas stove 1.

[0048] Please refer to Figures 1-3 In one embodiment, in order to facilitate the recovery of high-temperature flue gas by the smoke suction port 121a, the smoke suction port 121a can be horizontally arranged towards the central axis of the pot rack body 11, so that the smoke suction port 121a can effectively collect the laterally diffused flue gas generated by heat convection around the pot rack 10, thereby reducing the probability of the laterally diffused flue gas escaping into the surrounding environment, further reducing the heat loss of smoke exhaust, and improving the overall thermal efficiency of the gas stove 1.

[0049] It can be understood that the smoke suction port 121a can also be arranged upward, so that the smoke suction port 121a is closer to the bottom of the cooking utensil, thereby increasing the probability of the smoke suction port 121a recovering high-temperature flue gas and improving the overall thermal efficiency of the gas stove 1.

[0050] It can be understood that the smoke suction port 121a can also be inclined upward and arranged towards the central axis of the pot rack body 11, and high-temperature flue gas can also be recovered. Exemplarily, the angle between the axis of the smoke suction port 121a and the central axis of the pot rack body 11 can be 15°, 30°, 40°, 45°, 60°, 70°... In other embodiments, the angle between the axis of the smoke suction port 121a and the central axis of the pot rack body 11 can also be other angles, and in the embodiments of the present application, no specific limitation is made thereto.

[0051] It can be understood that the smoke suction port 121a of the flue gas recovery device 12 can have three types of smoke suction ports 121a, namely, horizontally arranged towards the central axis of the pot rack body 11, arranged upward, and inclined upward and arranged towards the central axis of the pot rack body 11, so as to strengthen the flue gas recovery angle of the smoke suction port 121a, thereby ensuring that the smoke suction port 121a recovers high-temperature flue gas and improving the overall thermal efficiency of the gas stove 1.

[0052] Please refer to Figures 1-3, in one embodiment, the flue gas recovery device 12 includes a smoke collecting member 121 and a smoke delivery pipe 122. The smoke collecting member 121 has a smoke suction port 121a. The smoke collecting member 121 is located on the upper surface 111a or on the outer periphery of the pot rack body 11 and at least partially protrudes upward from the upper surface 111a, so that the smoke collecting member 121 can closely cover the pot heating area, so that the smoke collecting member 121 can preferentially capture the hottest flue gas, thereby improving the waste heat recovery efficiency of the flue gas and further improving the overall thermal efficiency of the gas stove 1. The smoke delivery pipe 122 is communicated with the smoke collecting member 121 and has a smoke delivery channel 122a. The first air supplement port 123a is arranged on the smoke delivery pipe 122 and is close to the combustion chamber 11a to supplement flue gas to the combustion chamber 11a.

[0053] It can be understood that the smoke delivery pipe 122 can be welded to the smoke collecting member 121, the smoke collecting member 121 can be welded to the pot rack body 11, or the smoke collecting member 121 can be placed on the pot rack body 11 to support the flue gas recovery device 12 through the pot rack body 11, which can reduce the probability of the flue gas recovery device 12 detaching from the pot rack body 11, so as to ensure that the flue gas recovery device 12 can recover high-temperature flue gas and improve the overall thermal efficiency of the gas stove 1.

[0054] It can be understood that in order to improve the uniformity of supplementing flue gas into the combustion chamber 11a, the flue gas recovery device 12 can have a plurality of smoke delivery pipes 122, and the first air supplement ports 123a of the plurality of smoke delivery pipes 122 are evenly spaced and annularly arranged on the periphery of the combustion chamber 11a, so as to evenly supplement high-temperature flue gas into the combustion chamber 11a, so that the high-temperature flue gas can fully contact the fuel in the combustion chamber 11a, so that the fuel is evenly heated, evenly shortening the combustion time of the fuel and promoting a more sufficient oxidation reaction.

[0055] Please refer to Figures 1-3 , in one embodiment, the pot rack body 11 includes an upper cover 111 and a lower cover 113. The upper cover 111 has an upper surface 111a; the lower cover 113 is connected to the upper cover 111 and is located below the upper cover 111. An insulation cavity (not shown in the figure) is formed between the lower cover 113 and the upper cover 111. The insulation cavity is used to block the downward heat conduction of high-temperature flue gas, reduce heat energy consumption, and can also reduce the influence of heat transfer on other components, so that other components can have a longer service life. And the insulation cavity can also reduce the heat interference of external cold air on the combustion chamber 11a, so that the combustion chamber 11a can maintain a higher temperature, promote the rapid volatilization and full combustion of the fuel, and improve the combustion efficiency. Further, heat insulating materials can be filled in the insulation cavity to enhance the heat insulation effect. The heat insulating materials can specifically be at least one of heat insulating cotton, aerogel, and foam plastic. In other embodiments, the heat insulating material can also be a heat insulating coating. In the embodiments of the present application, the specific form of the heat insulating material is not limited.

[0056] Please refer to Figures 1-3 , the smoke collecting member 121 is annular and is disposed around the peripheral side wall of the upper cover 111 and at least partially protrudes upward from the upper surface 111a. There are a plurality of smoke suction ports 121a, and the plurality of smoke suction ports 121a are arranged at intervals along the circumferential direction of the smoke collecting member 121, ensuring that the smoke from all directions around the pot rack 10 can be synchronously collected by the smoke collecting member 121, avoiding the pressure imbalance in the combustion chamber 11a caused by unilateral suction, so as to reduce the probability that the oxygen concentration in a local area of the combustion chamber 11a is insufficient and the fuel cannot be fully burned.

[0057] It can be understood that, in order to improve the movement smoothness of the smoke after entering the smoke collecting member 121, a micro deflector can be arranged inside each smoke suction port 121a. The micro deflector can guide the smoke to move spirally in the smoke collecting member 121, and then enter the smoke delivery pipe 122 in a spiral form, so as to improve the movement smoothness of the smoke and the smoke recovery efficiency.

[0058] In other embodiments, a temperature monitoring member can also be arranged in the smoke collecting member 121. The temperature of the smoke inside the smoke collecting member 121 is obtained through the temperature monitoring member, and then the gas stove 1 is controlled to dynamically adjust the air supplement amounts of the gas and the air, so as to optimize the waste heat recovery efficiency. Exemplarily, the temperature monitoring member includes but is not limited to at least one of a thermistor and an infrared sensor. In other embodiments, the temperature monitoring member can also be in other forms. In the embodiments of the present application, the specific form of the temperature monitoring member is not limited.

[0059] Please refer to Figures 1-3 , in one embodiment, the inner diameter of the smoke collecting member 121 is D1, and the outer diameter of the upper cover 111 is D2. When 0≤D1 - D2≤20mm, it can ensure that the inner diameter of the smoke collecting member 121 and the outer diameter of the upper cover 111 are highly matched, enabling the high-temperature smoke to be captured in time during the rising process, reducing the probability of lateral smoke dispersion, and ensuring that the smoke collecting member 121 can recover the high-temperature smoke, so as to improve the thermal efficiency of the gas stove 1.

[0060] If D1 - D2>20mm, it will cause the smoke collecting member 121 to be much larger than the outer diameter of the upper cover 111, resulting in a relatively large distance between the smoke collecting member 121 and the combustion chamber 11a, causing more lateral smoke dispersion, and because the distance between the smoke collecting member 121 and the combustion chamber 11a is relatively large, the temperature of the smoke recovered by the smoke collecting member 121 is relatively low, resulting in a poor smoke recovery effect.

[0061] If D1 - D2 < 0, it will cause the inner diameter of the smoke collecting member 121 to be smaller than the outer diameter of the upper cover 111, resulting in the premature inhalation of high-temperature flue gas by the smoke collecting member 121, causing the high-temperature flue gas to be sucked away by the smoke suction port 121a before it has fully contacted the bottom of the cooking utensil, resulting in a shortened contact time between the bottom of the cooking utensil and the high-temperature flue gas, resulting in a reduced heating time at the bottom of the cooking utensil and a decrease in heat transfer efficiency.

[0062] Please refer to Figure 1 、 Figure 4 and Figure 5 In an embodiment, the flue gas recovery device 12 further includes a gas supplementing member 123. The gas supplementing member 123 is connected to the lower surface of the pot support body 11 and communicates with one end of the smoke delivery pipe 122 away from the smoke collecting member 121. The gas supplementing member 123 is disposed around the circumference of the combustion chamber 11a and has a plurality of first gas supplementing ports 123a facing the combustion chamber 11a. The plurality of first gas supplementing ports 123a are evenly spaced to allow high-temperature flue gas to be evenly injected into the combustion chamber 11a through the plurality of first gas supplementing ports 123a, so as to eliminate local oxygen-deficient areas in the combustion chamber 11a, thereby ensuring sufficient combustion of the fuel and improving the thermal efficiency of the gas stove 1.

[0063] And because the high-temperature flue gas can be evenly injected into the combustion chamber 11a through the plurality of first gas supplementing ports 123a, it can evenly supplement high-temperature flue gas into the combustion chamber 11a, so that the high-temperature flue gas can fully contact the fuel in the combustion chamber 11a, making the fuel evenly heated, evenly shortening the combustion time of the fuel, promoting a more sufficient oxidation reaction, improving the thermal effect of the fuel, and further improving the thermal efficiency of the gas stove 1.

[0064] It can be understood that the number of the first gas supplementing ports 123a provided on the gas supplementing member 123 can be 4, 6, 8, 9, 10... In other embodiments, the number of the first gas supplementing ports 123a can also be other numbers. In the embodiments of the present application, no specific limitation is made on the number of the first gas supplementing ports 123a. It can be understood that the gas supplementing member 123 can be welded to the lower surface of the pot support body 11, thereby improving the connection stability between the flue gas recovery device 12 and the pot support body 11.

[0065] Please refer to Figure 1 、 Figure 4 and Figure 5 In an embodiment, the air flow direction of the flue gas sent out by the first gas supplementing port 123a is perpendicular to the axial direction of the combustion chamber 11a, which can make the air flow of the flue gas sent out by the first gas supplementing port 123a form an orthogonal collision with the air flow direction of the fuel in the combustion chamber 11a, break the laminar boundary layer of the fuel, and make the fuel, oxygen and flue gas fully mix, thereby improving the combustion efficiency of the fuel, ensuring sufficient combustion of the fuel, reducing the generation of residues, reducing PM2.5 / PM10 emissions, and improving air quality.

[0066] In other embodiments, the flow direction of the flue gas sent out from the first air supplement port 123a can also be set around the axis of the combustion chamber 11a, enabling the flue gas to move spirally within the combustion chamber 11a, so as to extend the residence time of the flue gas in the combustion chamber 11a, thereby fully heating the air in the combustion chamber 11a, fully mixing with the fuel and oxygen, and ensuring complete combustion of the fuel.

[0067] Please refer to Figure 1 , Figures 4-6 , specifically, the air supplement member 123 may include an annular body 1231 and a swirl member 1232. The annular body 1231 has a first air supplement port 123a and an inner cavity 123b, and the inner cavity 123b communicates with the flue gas pipe 122 and the first air supplement port 123a; the swirl member 1232 is disposed at intervals within the inner cavity 123b, and a swirl channel 123c is formed between two adjacent swirl members 1232. The swirl channel 123c is used to change the flow direction of the flue gas within the inner cavity 123b, so that the flue gas sent out from the first air supplement port 123a is set around the axis of the combustion chamber 11a, ensuring sufficient contact between the fuel and the flue gas and ensuring complete combustion of the fuel.

[0068] Further, the swirl member 1232 may include an arc-shaped swirl plate (not shown in the figure). The arc-shaped swirl plate is disposed within the inner cavity 123b and extends in an arc shape, so that the swirl channel 123c is arc-shaped, extending the movement path of the flue gas, further extending the contact time between the flue gas and the air on the peripheral side of the combustion chamber 11a, increasing the preset temperature of the air on the peripheral side of the combustion chamber 11a, and further improving the overall thermal efficiency of the gas stove 1.

[0069] It can be understood that the swirl member 1232 may also include a flat swirl plate (not shown in the figure). The flat swirl plate is disposed within 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, which can also change the flow direction of the flue gas, so that the flue gas blown out from the first air supplement port 123a can be set around the axis of the combustion chamber 11a, extending the movement path of the flue gas, further increasing the temperature of the air within the combustion chamber 11a, and further improving the overall thermal efficiency of the gas stove 1. In the embodiments of the present application, the specific form of the swirl member 1232 is not limited.

[0070] Please refer to Figure 1 and Figure 7, in one embodiment, the burner 20 further has a gas mixing chamber 20a. The smoke delivery channel 122a can also communicate with the gas mixing chamber 20a to deliver the high-temperature flue gas inhaled by the smoking port 121a into the gas mixing chamber 20a, so as to mix with the mixed gas in the gas mixing chamber 20a, thereby being able to heat the mixed gas in the gas mixing chamber 20a to accelerate the volatilization and mixing of the fuel. Furthermore, 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 the overall thermal efficiency of the gas stove 1 can be improved.

[0071] Please refer to Figure 1 and Figure 7 , specifically, one end of the smoke delivery pipe 122 away from the pot support body 11 has a second air supplement port 122c. The second air supplement port 122c communicates with the gas mixing chamber 20a, so that the high-temperature flue gas suctioned through the smoking port 121a can enter the smoking channel and enter the gas mixing chamber 20a through the second air supplement port 122c to preheat the mixed gas in the gas mixing chamber 20a.

[0072] It can be understood that the smoke delivery pipe 122 can be welded to the gas mixing chamber 20a to ensure the connection stability between the smoking channel and the gas mixing chamber 20a, thereby reducing the probability of the escape of high-temperature flue gas and the mixed gas.

[0073] Please refer to Figure 1 and Figure 7 , it can be understood that the mixed gas in the gas mixing chamber 20a is a mixed gas of gas and air. The gas mixing chamber 20a is communicated with an ejector pipe 30. The ejector pipe 30 is communicated with the gas pipe. The gas in the gas pipe can enter the ejector pipe 30 and then enter the gas mixing chamber 20a through the ejector pipe 30 to mix with air to form a mixed gas.

[0074] Please refer to Figure 1 and Figure 8 and Figure 9 , in one embodiment, the air supplement member 123 is simultaneously connected to the gas delivery pipe, and is arranged between the power device 124 and the second air supplement port 122c and is looped around the periphery of the burner 20 to supplement high-temperature flue gas to the combustion chamber 11a. At this time, the high-temperature flue gas can enter the smoking channel from the smoking port 121a and enter the combustion chamber 11a through the first air supplement port 123a, and also enter the gas mixing chamber 20a through the second air supplement port 122c, thereby being able to preheat the air in both the combustion chamber 11a and the gas mixing chamber 20a at the same time to ensure that the fuel can burn sufficiently and improve the overall thermal efficiency of the gas stove 1.

[0075] In the description of the present application, it should be understood that if there are terms such as "upper", "lower", "left", "right", etc., the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings. This 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 for illustrative purposes and should not be construed as a limitation to the present application. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0076] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as implying or indicating relative importance or implicitly specifying the quantity of the indicated technical features. Thus, 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 and clearly defined.

[0077] In the description of the present application, unless otherwise clearly specified and defined, terms such as "installed", "connected", "connected to", "fixed", etc. should 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 communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. 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.

[0078] 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 illustrative purposes and do not represent the only implementation manner.

[0079] The above content is only the specific implementation manner 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 should 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 body which is arranged in a ring shape and encloses to form a combustion chamber for the flame of the burner to pass through, and the pot support body further has an upper surface facing the cooking utensil; and A flue gas recovery device having a smoke suction port and a smoke delivery channel which are communicated 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 body and at least partially protrudes upward from the upper surface for collecting flue gas, and the smoke delivery channel is communicated with the gas mixing chamber for delivering the flue gas sucked in by the smoke suction port into the gas mixing chamber.

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, and the smoke collecting member is located on the upper surface or on the outer periphery of the pot support body and at least partially protrudes upward from the upper surface; and A smoke delivery pipe which is communicated with the smoke collecting member to form the smoke delivery channel, and the smoke delivery pipe is communicated with the gas mixing chamber to supplement primary air to the gas mixing chamber.

3. The gas stove according to claim 2, characterized in that, The pot support body includes: An upper layer cover having the upper surface; and A lower layer cover which is connected to the upper layer cover and is 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 in a ring shape and is arranged around the circumferential side wall of the upper layer cover and at least partially protrudes 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.

4. The gas stove according to claim 3, 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 ≤ 20 mm.

5. The gas stove according to claim 2, characterized in that, The smoke suction port is horizontally arranged towards the central axis of the pot support body, or the smoke suction port is arranged upward, or the smoke suction port is inclined upward towards the central axis of the pot support body.

6. The gas stove according to claim 2, characterized in that, The flue gas recovery device further includes: An air supplementing member which is connected to the lower surface of the pot support body and is communicated with the end of the smoke delivery pipe far from the smoke collecting member. The air supplementing member is arranged around the circumference of the combustion chamber and has a plurality of first air supplementing ports facing the combustion chamber.

7. The gas stove according to claim 6, characterized in that, The air flow direction of the flue gas sent out from the first air supplementing port is perpendicular to the axial direction of the combustion chamber or is arranged around the axial direction of the combustion chamber.

8. The gas stove according to claim 6, wherein, The air supplementing member includes: A ring body having the first air supplementing port and an inner cavity, and the inner cavity is communicated with the smoke delivery pipe and the first air supplementing port; and A swirl member which is arranged at intervals in the inner cavity, and a swirl channel is formed between two adjacent swirl members for changing the flow direction of the secondary air in the inner cavity so that the flue gas sent out from the first air supplementing port is arranged around the axial direction of the combustion chamber.

9. The gas stove according to claim 8, characterized in that, The swirl member includes: An arc-shaped swirl plate which is arranged in the inner cavity and extends in an arc shape; and / or; A flat swirl plate which is arranged in the inner cavity, and the flat swirl plate is arranged at an angle with the radial direction of the combustion chamber passing through itself.

10. The pot rack according to claim 2, wherein, The smoke delivery pipe further has an air suction port communicated with the smoke delivery channel.

11. The gas stove according to claim 2, wherein, The flue gas recovery device further includes: A check valve is provided in the smoke delivery pipe, and the valve port of the check valve is arranged towards the direction of the gas mixing chamber, and is used to block the gas in the gas mixing chamber from flowing through the smoke delivery pipe to the smoke collecting member.

12. The gas stove according to claim 2, characterized in that, The flue gas recovery device further includes: A filter element, which is detachably connected to the smoke delivery pipe and partially located in the smoke delivery channel, and the filter element is used to filter the flue gas flowing towards the gas mixing chamber.

13. The gas stove according to any one of claims 1 to 12, characterized in that, The flue gas recovery device further includes: A power device, which is arranged on the smoke delivery channel and communicated with the smoke delivery channel, and is used to drive the flue gas at the smoking port to flow through the smoke delivery channel to the gas mixing chamber.

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