A gas stove

Abstract

This invention belongs to the field of combustion technology, specifically disclosing a gas stove. The gas stove includes a burner assembly, a burner head assembly, a first gas valve, and a second gas valve. The burner assembly has a central gas chamber, a middle ring gas chamber, and an outer ring gas chamber arranged sequentially from the inside out. The burner assembly is installed on the upper end of the burner head assembly, which has a central gas passage communicating with the central gas chamber, a middle ring gas passage communicating with the middle ring gas chamber, and an outer ring gas passage communicating with the outer ring gas chamber. The two first gas outlets of the first gas valve are respectively connected to the central gas passage and the middle ring gas passage. The second gas valve has two second gas outlets, which are respectively connected to the central gas passage and the outer ring gas passage. The second gas valve controls the gas on / off and gas flow of the two second gas outlets. This invention can increase the heat adjustment range of the gas stove and improve the heating uniformity of the cooking appliances.

Description

Technical Field

[0001] This invention relates to the field of combustion technology, and more particularly to a gas stove. Background Technology

[0002] Gas stoves are common kitchen appliances that heat cooking utensils by igniting and burning gas. To meet the demand for greater firepower, some existing gas stoves have multi-ring flame combustion function.

[0003] The prior art provides a three-ring burner, which includes a burner head, a gas distribution seat, and a burner cap assembly arranged sequentially from bottom to top. The burner cap assembly includes a central burner cap, a middle ring burner cap, and an outer ring burner cap arranged sequentially from the inside to the outside. The burner head is provided with three injection channels, which supply gas to the central burner cap, the middle ring burner cap, and the outer ring burner cap respectively. The gas stove also includes a first gas valve and a second gas valve. The first gas valve has two gas outlet channels to supply gas to the injection channels corresponding to the central burner cap and the middle ring burner cap respectively. The other gas valve has one gas outlet channel to control the gas supply to the injection channel corresponding to the outer ring burner cap.

[0004] The existing three-ring burner, although it can control the combustion state of the three-ring burner through two gas valves, only heats the outer ring of the cooking appliance when only the second gas valve is open. This can easily lead to uneven heating and reduce the user experience of the cooking appliance. Summary of the Invention

[0005] The technical problem solved by this invention is to provide a gas stove that can effectively solve the problem of existing gas stoves with multi-ring combustion function affecting the uniformity of heating of cooking utensils.

[0006] The above-mentioned technical problems are solved by the following technical solutions:

[0007] A gas stove, comprising:

[0008] The flame cap assembly has a central gas chamber, a middle ring gas chamber, and an outer ring gas chamber that are sequentially separated from the inside to the outside. The flame cap assembly also has a central flame hole communicating with the central gas chamber, a middle ring flame hole communicating with the middle ring gas chamber, and an outer ring flame hole communicating with the outer ring gas chamber.

[0009] A burner assembly, wherein the burner cap assembly is installed at the upper end of the burner assembly, and the burner assembly has a central gas passage communicating with the central gas chamber, a middle ring gas passage communicating with the middle ring gas chamber, and an outer ring gas passage communicating with the outer ring gas chamber;

[0010] The first gas valve has two first gas outlets, which are respectively connected to the central gas channel and the middle ring gas channel. The first gas valve controls the gas on / off and gas flow of the two first gas outlets.

[0011] The second gas valve has two second gas outlets, which are respectively connected to the central gas channel and the outer ring gas channel. The second gas valve controls the gas flow and the gas supply of the two second gas outlets.

[0012] Compared with the prior art, the gas stove of the present invention has the following advantages: by setting a burner cap assembly with a central flame hole, a middle ring flame hole, and an outer ring flame hole, the multi-ring burner can meet the combustion requirements of multi-ring flames, thereby increasing the maximum heat load of the multi-ring burner and increasing the flame adjustment range of the multi-ring burner; since a first gas outlet of the first gas valve and a second gas outlet of the second gas valve are both connected to the central injection channel, the central gas channel is supplied with gas regardless of whether the first gas valve or the second gas valve is open, that is, there will be flame combustion at the central flame hole, thereby ensuring that the multi-ring burner has a central flame and an outer ring hole regardless of whether the first gas valve or the second gas valve is open, thereby improving the heating uniformity of cooking appliances and improving the user experience of the gas stove.

[0013] In one embodiment, the gas stove further includes a manifold connector having two manifold inlets and one manifold outlet. A first gas outlet and a second gas outlet are respectively connected to the manifold inlets. A gas nozzle is installed at the manifold outlet, and the gas nozzle is directly facing the gas inlet end of the central gas channel.

[0014] As an optional technical solution for a gas stove, the burner assembly includes a central burner, a middle ring burner, and an outer ring burner, which are sequentially spaced from the inside out. The central burner has a central gas cavity and a central flame hole, the middle ring burner has a middle ring gas cavity and a middle ring flame hole, and the outer ring burner has an outer ring gas cavity and an outer ring flame hole.

[0015] Alternatively, the flame cap assembly includes a central flame cap and an annular flame cap spaced apart. The central flame cap has a central gas chamber and a central flame hole. The annular flame cap has a middle annular gas chamber and an outer annular gas chamber separated from each other. The middle annular flame hole is provided on the inner side wall or upper end wall of the annular flame cap, and the outer annular flame hole is provided on the outer side wall of the annular flame cap.

[0016] In one embodiment, the gas stove further includes an ignition needle, the lower end of which is installed on the burner assembly and the upper end is located between the middle ring burner cap and the center burner cap. The gas stove has an ignition structure that guides the flame at the center burner hole to the outer ring burner hole.

[0017] Alternatively, the gas stove may further include an ignition needle, the lower end of which is installed on the burner assembly and the upper end of which is located between the middle ring burner cap and the outer ring burner cap. The gas stove has a first ignition structure and a second ignition structure. The first ignition structure guides the flame at the outer ring burner hole to the central burner hole, and the second ignition structure guides the flame at the middle ring burner hole to the central burner hole.

[0018] In one embodiment, the gas stove includes a thermocouple mounted on the burner assembly and having two potential output terminals, which are electrically connected to the first gas valve and the second gas valve, respectively.

[0019] In one embodiment, the ignition structure includes an ignition channel and a first ignition slit disposed at the upper end of the middle ring flame cap, wherein the ignition channel and the first ignition slit are separated from the middle ring gas chamber and the middle ring gas passage;

[0020] The first ignition slit penetrates the inner and outer walls of the middle ring flame cap. The outlet end of the ignition channel is connected to the first ignition slit, and the inlet end of the ignition channel is connected to the central gas channel, the outer ring gas channel, the outer ring gas cavity, or the outer ring gas cavity.

[0021] In one embodiment, the outlet of the ignition channel is located inside the middle annular gas chamber.

[0022] In one embodiment, the outer ring flame hole is disposed on the outer ring wall or upper end face of the outer ring flame cap, and the upper end of the outer ring flame cap is provided with an outer ring ignition slit, which communicates with the outer ring gas cavity. One end of the outer ring ignition slit penetrates the inner ring wall of the outer ring flame cap and the other end extends to the outer ring flame hole. The outer ring ignition slit and the first ignition slit are arranged opposite each other in the radial direction of the flame cap assembly.

[0023] In one embodiment, the middle ring flame hole is disposed on the outer ring wall of the middle ring flame cap, and the upper end of the middle ring flame cap is provided with a second ignition slit. The second ignition slit communicates with the middle ring gas cavity. The first end of the second ignition slit penetrates the inner ring wall of the middle ring flame cap and the second end extends to the middle ring flame hole. The second ignition slit and the first ignition slit are spaced apart in the circumferential direction of the middle ring flame cap.

[0024] In one embodiment, the burner assembly includes a furnace base and three ejector tubes arranged side by side. The inner cavities of the three ejector tubes respectively form a central ejector channel, a middle ring ejector channel, and an outer ring ejector channel. The upper end of the furnace base has a central premixing cavity, a middle ring premixing cavity, and an outer ring premixing cavity arranged sequentially from the inside to the outside. The central gas cavity is vertically connected to the central premixing cavity, the middle ring gas cavity is vertically connected to the middle ring premixing cavity, and the outer ring gas cavity is vertically connected to the outer ring premixing cavity.

[0025] The central ejector channel is connected to the central premixing chamber and together they form the central gas channel; the middle ring ejector channel is connected to the middle ring premixing chamber and together they form the middle ring gas channel; the outer ring ejector channel is connected to the outer ring premixing chamber and together they form the outer ring gas channel.

[0026] The ejector tube is detachably connected to the furnace base, and / or the furnace base is integrally formed. Attached Figure Description

[0027] Figure 1 This is a top view of the structure of a gas stove provided in an embodiment of the present invention;

[0028] Figure 2 This is a schematic diagram of the structure of a multi-ring burner provided in an embodiment of the present invention;

[0029] Figure 3 This is a cross-sectional view of a multi-ring burner provided in an embodiment of the present invention.

[0030] Figure 4 This is a cross-sectional view of a multi-ring burner provided in an embodiment of the present invention, taken from another section.

[0031] Label Explanation:

[0032] 1. Flame cap assembly; 11. Central flame cap; 111. Central gas chamber; 112. Central flame hole; 12. Middle ring flame cap; 121. Middle ring gas chamber; 122. Middle ring flame hole; 123. Ignition gas passage; 124. First ignition slit; 125. Second ignition slit; 13. Outer ring flame cap; 131. Outer ring gas chamber; 132. Outer ring flame hole; 133. Outer ring ignition slit;

[0033] 2. Burner head assembly; 21. Burner base; 22. Injector tube; 23. Central gas passage; 231. Central injector passage; 232. Central premixing chamber; 233. Central ventilation passage; 24. Middle ring gas passage; 241. Middle ring injector passage; 242. Middle ring premixing chamber; 25. Outer ring gas passage; 251. Outer ring injector passage; 252. Outer ring premixing chamber; 26. Ignition gas inlet passage; 261. Vertical passage section; 262. Horizontal passage section;

[0034] 3. Gas supply components; 31. First gas valve; 32. Second gas valve; 33. First gas supply line; 34. Second gas supply line; 35. Third gas supply line; 36. Fourth gas supply line; 37. Manifold;

[0035] 4. Gas nozzle; 5. Ignition needle; 6. Thermocouple; 7. Base. Detailed Implementation

[0036] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0037] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0038] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0039] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0040] This invention provides a gas stove that enhances the power adjustment range and improves the heating uniformity of cooking appliances, thereby enhancing the cooking experience.

[0041] like Figures 1 to 4As shown, in this embodiment, the gas stove includes a cooktop, a multi-ring burner, a controller, and a gas supply assembly 3. The cooktop includes a panel and a base 7, which together form an installation space; the multi-ring burner includes a burner head assembly 2 and a burner cap assembly 1 installed on the upper end of the burner head assembly 2; the burner head assembly 2 is installed in the installation space, and the burner cap assembly 1 extends out of the upper side of the panel.

[0042] The burner assembly 1 has a central gas chamber 111, a middle ring gas chamber 121 and an outer ring gas chamber 131 arranged sequentially from the inside to the outside. The burner assembly 1 also has a central flame hole 112 communicating with the central gas chamber 111, a middle ring flame hole 122 communicating with the middle ring gas chamber 121 and an outer ring flame hole 132 communicating with the outer ring gas chamber 131. The burner head assembly 2 has a central gas passage 23 communicating with the central gas chamber 111, a middle ring gas passage 24 communicating with the middle ring gas chamber 121 and an outer ring gas passage 25 communicating with the outer ring gas chamber 131.

[0043] The gas supply assembly 3 includes a first gas valve 31 and a second gas valve 32. The first gas valve 31 has two first gas outlets, which are respectively connected to the central gas channel 23 and the middle ring gas channel 24. The first gas valve 31 controls the gas supply and flow rate of the two first gas outlets. The second gas valve 32 has two second gas outlets, which are respectively connected to the central gas channel 23 and the outer ring gas channel 25. The second gas valve 32 controls the gas supply and flow rate of the two second gas outlets. Both the first gas valve 31 and the second gas valve 32 are communicatively connected to the controller.

[0044] The gas stove provided in this embodiment, by setting a burner cap assembly 1 with a central flame hole 112, a middle ring flame hole 122, and an outer ring flame hole 132, enables the multi-ring burner to meet the combustion requirements of multiple ring flames, thereby increasing the maximum heat load of the multi-ring burner and increasing the flame adjustment range of the multi-ring burner. Since a first gas outlet of the first gas valve 31 and a second gas outlet of the second gas valve 32 are both connected to the central injection channel 231, the central gas channel 23 is supplied with gas regardless of whether the first gas valve 31 or the second gas valve 32 is open, that is, there will be flame combustion at the central flame hole 112. This ensures that the multi-ring burner has a central flame and an outer ring hole regardless of whether the first gas valve 31 or the second gas valve 32 is open, thereby improving the heating uniformity of cooking appliances and improving the user experience of the gas stove.

[0045] The gas supply assembly 3 also includes a gas main pipe. The gas inlets of the first gas valve 31 and the second gas valve 32 are both connected to the gas main pipe. The structure of the first gas valve 31 and the second gas valve 32, as well as the on / off control and flow regulation control of the gas, can be set with reference to existing technology, and will not be described in detail here.

[0046] In one embodiment, the gas stove further includes another burner, which may adopt a conventional two-ring burner structure or the multi-ring burner structure provided in this embodiment, or may adopt the structure of other existing burners. The present invention does not limit or elaborate on this.

[0047] To facilitate the connection between the first and second gas outlets and their corresponding gas passages, one first gas outlet is connected to the central gas passage 23 via the first gas supply pipeline 33, and the other first gas outlet is connected to the middle ring gas passage 24 via the second gas supply pipeline 34; one second gas outlet is connected to the central gas passage 23 via the third gas supply pipeline 35, and the other second gas outlet is connected to the outer ring gas passage 25 via the fourth gas supply pipeline 36.

[0048] In one embodiment, the gas stove further includes a manifold 37, which has two manifold inlets and one manifold outlet. A first gas outlet and a second gas outlet are respectively connected to the two manifold inlets. A gas nozzle 4 is installed at the manifold outlet, and the gas nozzle 4 is directly opposite the gas inlet of the central gas channel 23. Specifically, the gas outlets of the first gas supply line 33 and the third gas supply line 35 are respectively connected to the two manifold inlets. By setting the manifold 37, it is convenient to realize the connection between the first gas supply line 33 and the third gas supply line 35 and the central combustion channel. At the same time, when both the first gas supply line 33 and the third gas supply line 35 are supplying gas, it is also convenient to control the amount of gas entering the central gas channel 23 through the manifold outlet, so as to avoid excessive gas supply to the central gas channel 23, which would affect the combustion performance of the multi-ring burner.

[0049] Both the second gas supply line 34 and the third gas supply line 35 are equipped with gas nozzles 4 at their outlet ends, which inject gas into the central gas passage 23 and the outer ring gas passage 25, respectively.

[0050] In one embodiment, the burner assembly 2 includes a furnace base 21 and ejector tubes 22. Three ejector tubes 22 are arranged side by side, with their outlet ends connected to the furnace base 21. The inner cavities of the three ejector tubes 22 respectively form a central ejector channel 231, a middle ring ejector channel 241, and an outer ring ejector channel 251. The upper end of the furnace base 21 has a central premixing chamber 232, a middle ring premixing chamber 242, and an outer ring premixing chamber 252 arranged sequentially from the inside to the outside. The central gas chamber 111 is vertically connected to the central premixing chamber 232, the middle ring gas chamber 121 is vertically connected to the middle ring premixing chamber 242, and the outer ring gas chamber 131 is vertically connected to the outer ring premixing chamber 252. The central ejector channel 231 is connected to the central premixing chamber 232 and together they form the central gas channel 23. The middle ring ejector channel 241 is connected to the middle ring premixing chamber 242 and together they form the middle ring gas channel 24. The outer ring ejector channel 251 is connected to the outer ring premixing chamber 252 and together they form the outer ring gas channel 25. This arrangement simplifies the connection structure between each gas channel and its corresponding gas chamber, and also improves the uniformity of gas supply to each gas chamber in the circumferential direction.

[0051] Furthermore, both the middle ring premixing chamber 242 and the outer ring premixing chamber 252 are annular cavities. The central ejector channel 231 is connected to the central premixing chamber 232 through the central ventilation channel 233, the middle ring ejector channel 241 is connected to the middle ring premixing chamber 242 through the middle ring ventilation channel, and the outer ring ejector channel 251 is connected to the outer ring premixing chamber 252 through the outer ring ventilation channel.

[0052] Specifically, the three gas nozzles 4 are respectively positioned directly opposite the center lines of the central ejector channel 231, the middle ring ejector channel 241, and the outer ring ejector channel 251. The specific structure of the ejector tube 22 and the principle of ejecting gas and air can be set with reference to existing technology, and will not be described in detail here.

[0053] In one embodiment, the ejector tube 22 is detachably connected to the furnace base 21, which helps to reduce the processing difficulty of the furnace head assembly 2 and thus reduce the processing cost. Specifically, a connecting pipe is provided on the lower outer side wall of the furnace base 21, and the connecting pipe is provided in a one-to-one correspondence with the ejector tube 22, and the connecting pipe is detachably connected to the corresponding ejector tube 22.

[0054] In one embodiment, the furnace base 21 is integrally formed, that is, the furnace base 21 integrates the gas distribution seat structure, so as to reduce the number of parts of the multi-ring burner, reduce the assembly difficulty of the burner head assembly 2, and improve the assembly efficiency.

[0055] In one embodiment, adjacent ejector tubes 22 are connected by a connecting portion to ensure the accuracy of the relative positions of the three ejector tubes 22. Specifically, the outlet ends of adjacent ejector tubes 22 are connected by a first connecting portion, and adjacent connecting tube ends are connected by a second connecting portion. The first and second connecting portions are detachably connected. At least some of the inlet ends of two adjacent ejector tubes 22 are connected by a third connecting portion.

[0056] To improve the ease of installation of the gas nozzle 4, the gas stove also includes a mounting plate. The mounting plate extends along the parallel direction of the three ejector tubes 22 and is connected to the inlet end of the three ejector tubes 22, so that the mounting plate spans the gas inlet end of the three ejector tubes 22. The mounting plate has mounting holes facing the central axis of each ejector tube 22, and the three gas nozzles 4 are respectively installed at the mounting holes, which facilitates the alignment of the axis of the gas nozzle 4 with the central axis of the ejector tube 22.

[0057] In one embodiment, the gas stove further includes an ignition needle 5. The lower end of the ignition needle 5 is installed on the burner assembly 2, and the upper end of the ignition needle 5 is located between the central burner cap 11 and the middle ring burner cap 12. The multi-ring burner is provided with an ignition structure, which guides the flame at the central burner cap 11 to the outer ring burner cap 13. This arrangement allows the ignition needle 5 to ignite the mixed gas flowing out of the central burner cap 112 and the middle ring burner cap 122 when the first gas supply line 33 and the second gas supply line 34 supply gas simultaneously, thereby achieving ignition and combustion at the central burner cap 11 and the middle ring burner cap 12. When the third gas supply line 35 and the fourth gas supply line 36 supply gas, the ignition needle 5 first ignites the mixed gas flowing out of the central burner cap 112, and then the burning flame is guided to the outer ring burner cap 13 through the ignition structure, thereby igniting the mixed gas flowing out of the outer ring burner cap 13. The above setup can satisfy the ignition and combustion needs of each burner cap, while only requiring one ignition needle 5, thus reducing the cost of the gas stove and minimizing the footprint of the multi-ring burner.

[0058] In another embodiment, the ignition needle 5 can be installed between the middle ring burner cap 12 and the outer ring burner cap 13, and the multi-ring burner is provided with a first ignition structure and a second ignition structure. The first ignition structure guides the flame at the outer ring burner hole 132 to the central burner hole 112; the second ignition structure guides the flame at the middle ring burner hole 122 to the central burner hole 112.

[0059] In another embodiment, two ignition needles 5 may be provided. One ignition needle 5 is installed between the center burner cap 11 and the middle ring burner cap 12, and the other ignition needle 5 is installed between the middle ring burner cap 12 and the outer ring burner cap 13, or installed on the outside of the outer ring burner cap 13. That is, when the first gas valve 31 is opened, the ignition needle 5 installed on the inside of the middle ring burner cap 12 ignites; when the second gas valve 32 is opened, or when the first gas valve 31 and the second gas valve 32 are opened simultaneously, both ignition needles 5 ignite simultaneously.

[0060] The ignition needle 5 has two voltage input terminals, and both voltage output terminals are electrically connected to the controller. When the first gas valve 31 opens to supply gas to the first gas supply line 33 and the second gas supply line 34, one voltage input terminal is output with a first set voltage for ignition; when the second gas valve 32 opens to supply gas to the third gas supply line 35 and the fourth gas supply line 36, the other voltage input terminal is input with a second set voltage for ignition. The ignition principle of the ignition needle 5 can be found in existing technology and will not be elaborated here.

[0061] The gas stove also includes a thermocouple 6. The lower end of the thermocouple 6 is installed on the burner assembly 2, and the upper end is located between the central burner cap 11 and the middle ring burner cap 12. The thermocouple 6 has two potential output terminals, which provide opening potentials to the first gas valve 31 and the second gas valve 32 respectively, or can provide opening electromotive force to both the first gas valve 31 and the second gas valve 32 simultaneously. The structure of the thermocouple 6 and the structure and principle by which the thermocouple 6 provides opening potentials to the gas valves can be set with reference to existing technology, and this embodiment does not limit or elaborate on this.

[0062] In one embodiment, the ignition structure includes an ignition channel and a first ignition slit 124 disposed at the upper end of the middle ring burner cap 12. The ignition channel and the first ignition slit 124 are separated from the middle ring gas chamber 121 and the middle ring gas passage. The first ignition slit 124 penetrates the inner and outer walls of the middle ring burner cap 12. The outlet end of the ignition intake channel 26 is connected to the first ignition slit 124. The intake end of the ignition intake channel 26 is connected to the central gas passage 23, the outer ring gas passage 25, the outer ring gas chamber 131, or the outer ring gas chamber 131.

[0063] When the second gas valve 32 is opened so that both the third gas supply line 35 and the fourth gas supply line 36 supply gas, the gas supplied by the third gas supply line 35 enters the central gas passage 23 and the central gas chamber 111 in sequence, and the gas supplied by the fourth gas supply line 36 enters the outer ring gas passage 25 and the outer ring gas chamber 131 in sequence. If the second end of the ignition intake passage 26 is connected to the central gas passage 23 or the central gas chamber 111, some of the gas in the central gas passage 23 or the central gas chamber 111 will flow to the ignition passage and flow upward from the first ignition seam 124. Thus, when a flame exists at the central flame hole 112 due to ignition by the ignition needle 5, the flame will be conducted to the first ignition seam 124, and then from the first ignition seam 124 to the outer ring flame hole 132 of the outer ring flame cap 13. If the second end of the ignition passage is connected to the outer ring gas passage 25 or the outer ring gas chamber 131, some of the gas in the outer ring gas passage 25 or the outer ring gas chamber 131 will flow to the first ignition seam 124 through the ignition passage and flow upward from the first ignition seam 124, thereby achieving flame conduction.

[0064] In one embodiment, the outer ring flame hole 132 is disposed on the outer ring wall or upper surface of the outer ring flame cap 13. The upper end of the outer ring flame cap 13 has an outer ring ignition slit 133, one end of which penetrates the inner ring wall of the outer ring flame cap 13, and the other end extends to the outer ring flame hole 132. The outer ring ignition slit 133 and the first ignition slit 124 are radially opposite each other in the flame cap assembly 1. Thus, when the second gas valve 32 is opened, the flame at the central flame hole 112 is guided sequentially through the first ignition slit 124 and the outer ring ignition slit 133 to the outer ring flame hole 132. In other embodiments, the outer ring flame hole 132 may also be disposed on the end face of the outer ring flame cap 13 or near the inner side of the outer ring flame hole 132, or the outer ring flame hole 132 may have two rings of flame holes, in which case ignition can be achieved without the outer ring ignition slit 133.

[0065] In one embodiment, the central ring flame hole 122 is disposed on the outer ring wall of the central ring flame cap 12. A second ignition slit 125 is provided at the upper end of the central ring flame cap 12, communicating with the central ring gas chamber 121. The first end of the second ignition slit 125 penetrates the inner ring wall of the central ring flame cap 12, and the second end extends to the central ring flame hole 122. The second ignition slit 125 and the first ignition slit 124 are spaced apart circumferentially from each other on the central ring flame cap 12. By disposing of the central ring flame hole 122 on the outer ring wall of the central ring flame cap 12, when the first gas valve 31 is opened, the flame formed at the central ring flame cap 12 can be positioned outwards to heat the outer bottom of the cooking appliance. Furthermore, interference between the flame at the central flame hole 112 and the flame at the central ring flame cap 12 can be better avoided, improving combustion stability.

[0066] In one embodiment, the first ignition seam 124 and the second ignition seam 125 are at an angle greater than 90° around the middle ring fire cap 12 to increase the distance between the first ignition seam 124 and the second ignition seam 125 and ensure the reliability of ignition transmission.

[0067] In one embodiment, the outlet of the ignition channel is located inside the middle ring gas cavity 121, which avoids the ignition structure being set on the outside of the middle ring flame cap 12, causing the outer part of the middle ring flame cap 12 to bulge. At the same time, setting the outlet of the ignition channel inside the middle ring gas cavity 121 also facilitates the connection between the ignition channel and the first ignition seam 124.

[0068] To further reduce the processing difficulty of the ignition channel, in one embodiment, the ignition channel includes an ignition gas channel 123 and an ignition gas inlet channel 26. The ignition gas outlet channel 123 is disposed inside the middle annular gas chamber 121, and the ignition gas inlet channel 26 is disposed on the burner head assembly 2 and communicates with the central gas channel 23 or the outer annular gas channel 25. The outlet end of the ignition gas inlet channel 26 is connected to the ignition gas inlet channel 123. Disposing of the ignition gas inlet channel 26 on the burner head assembly 2 provides sufficient space for its installation, simplifies the processing of the ignition channel, and reduces the processing difficulty of the burner cap assembly 1.

[0069] To improve the ease of processing the ignition intake channel 26, in one embodiment, the ignition intake channel 26 includes a vertical channel portion 261 and a horizontal channel portion 262. The horizontal channel portion 262 is connected to the lower end of the vertical channel portion 261, and the upper end of the vertical channel portion 261 is directly connected to the ignition channel 123. The horizontal channel portion 262 penetrates the outer wall of the burner assembly 2 and is connected to the outer ring gas channel 25 or the central gas channel 23. The gas stove includes a plug that seals the opening of the horizontal channel portion 262. By having one end of the horizontal channel portion 262 penetrate the outer wall of the burner assembly 2, processing of the horizontal channel portion 262 is facilitated. Furthermore, the upper end of the vertical channel portion 261 penetrates the burner assembly 2, facilitating processing of the vertical channel portion 261. Simultaneously, the plug seals the opening of the horizontal channel portion 262 to prevent leakage.

[0070] In one embodiment, the vertical channel portion 261 penetrates the bottom of the central ring premixing cavity 242, forming a through opening. A lower partition wall protrudes from the bottom of the central ring premixing cavity 242, surrounding the through opening. The upper end of the lower partition wall abuts against the central ring burner cap 12, thus separating the vertical channel portion 261 from the central ring premixing cavity 242. This arrangement further simplifies the structure of the furnace base 21 and improves the ease of communication between the ignition intake channel 26 and the ignition channel 123. In other embodiments, the upper end of the ignition intake channel 26 may be located outside the outer wall of the central ring premixing cavity 242 or inside the inner wall of the central ring premixing cavity 242.

[0071] In one embodiment, the upper cavity wall of the middle ring gas chamber 121 is provided with an upper partition wall protruding downwards. The upper partition wall and one side cavity wall of the gas chamber together form an ignition channel 123 that is separated from the middle ring gas chamber 121, thereby simplifying the structure of the middle ring flame cap 12. The lower end of the upper partition wall abuts against the upper end of the lower partition, so that the ignition inlet channel 26 and the ignition channel 123 are directly connected.

[0072] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0073] The specific embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A gas stove, characterized in that, include: The flame cap assembly (1) has a central gas chamber (111), a middle ring gas chamber (121) and an outer ring gas chamber (131) arranged sequentially from the inside to the outside. The flame cap assembly (1) also has a central flame hole (112) communicating with the central gas chamber (111), a middle ring flame hole (122) communicating with the middle ring gas chamber (121) and an outer ring flame hole (132) communicating with the outer ring gas chamber (131). Burner assembly (2), the burner cap assembly (1) is installed on the upper end of the burner assembly (2), the burner assembly (2) has a central gas passage (23) communicating with the central gas chamber (111), a central ring gas passage (24) communicating with the central ring gas chamber (121) and an outer ring gas passage (25) communicating with the outer ring gas chamber (131); The first gas valve (31) has two first gas outlets, which are respectively connected to the central gas passage (23) and the middle ring gas passage (24). The first gas valve (31) controls the gas flow and gas flow of the two first gas outlets. The second gas valve (32) has two second gas outlets, which are respectively connected to the central gas channel (23) and the outer ring gas channel (25). The second gas valve (32) controls the gas flow and gas flow of the two second gas outlets.

2. The gas stove according to claim 1, characterized in that, The gas stove also includes a manifold connector (37), which has two manifold inlets and one manifold outlet. A first gas outlet and a second gas outlet are respectively connected to the two manifold inlets. A gas nozzle (4) is installed at the manifold outlet, and the gas nozzle (4) is directly facing the gas inlet end of the central gas channel (23).

3. The gas stove according to claim 1, characterized in that, The flame cap assembly (1) includes a central flame cap (11), a middle ring flame cap (12), and an outer ring flame cap (13) arranged sequentially from the inside to the outside. The central flame cap (11) has a central air chamber (111) and a central flame hole (112). The middle ring flame cap (12) has a middle ring air chamber (121) and a middle ring flame hole (122). The outer ring flame cap (13) has an outer ring air chamber (131) and an outer ring flame hole (132). Alternatively, the flame cap assembly (1) includes a central flame cap (11) and an annular flame cap spaced apart. The central flame cap (11) has a central gas chamber (111) and a central flame hole (112). The annular flame cap has a middle annular gas chamber (121) and an outer annular gas chamber (131) separated from each other. The inner sidewall or upper endwall of the annular flame cap is provided with the middle annular flame hole (122), and the outer sidewall of the annular flame cap is provided with the outer annular flame hole (132).

4. The gas stove according to claim 3, characterized in that, The gas stove also includes an ignition needle (5), the lower end of which is installed on the burner assembly (2) and the upper end is located between the middle ring burner cap (12) and the center burner cap (11). The gas stove has an ignition structure that guides the flame at the center burner hole (112) to the outer ring burner hole (132). Alternatively, the gas stove may also include an ignition needle (5), the lower end of which is installed on the burner assembly (2) and the upper end is located between the middle ring burner cap (12) and the outer ring burner cap (13). The gas stove has a first ignition structure and a second ignition structure. The first ignition structure guides the flame at the outer ring burner hole (132) to the central burner hole (112), and the second ignition structure guides the flame at the middle ring burner hole (122) to the central burner hole (112).

5. The gas stove according to claim 4, characterized in that, The gas stove includes a thermocouple (6), which is installed on the burner assembly (2) and has two potential output terminals. The two potential output terminals are electrically connected to the first gas valve (31) and the second gas valve (32), respectively.

6. The gas stove according to claim 4, characterized in that, The ignition structure includes an ignition channel and a first ignition slit (124) disposed at the upper end of the middle ring flame cap (12). The ignition channel and the first ignition slit (124) are both separated from the middle ring gas chamber (121) and the middle ring gas passage (24). The first ignition slit (124) penetrates the inner and outer walls of the middle ring flame cap (12), the outlet end of the ignition channel is connected to the first ignition slit (124), and the inlet end of the ignition channel is connected to the central gas channel (23), the outer ring gas channel (25), the outer ring gas chamber (131) or the outer ring gas chamber (131).

7. The gas stove according to claim 6, characterized in that, The outlet of the ignition channel is located inside the middle annular gas chamber (121).

8. The gas stove according to claim 6, characterized in that, The outer ring flame hole (132) is disposed on the outer ring wall or upper surface of the outer ring flame cap (13). The upper end of the outer ring flame cap (13) is provided with an outer ring ignition slit (133). The outer ring ignition slit (133) is connected to the outer ring gas chamber (131). One end of the outer ring ignition slit (133) penetrates the inner ring wall of the outer ring flame cap (13) and the other end extends to the outer ring flame hole (132). The outer ring ignition slit (133) and the first ignition slit (124) are arranged opposite each other in the radial direction of the flame cap assembly (1).

9. The gas stove according to claim 6, characterized in that, The middle ring flame hole (122) is disposed on the outer ring wall of the middle ring flame cap (12). The upper end of the middle ring flame cap (12) is provided with a second ignition slit (125). The second ignition slit (125) is connected to the middle ring gas chamber (121). The first end of the second ignition slit (125) penetrates the inner ring wall of the middle ring flame cap (12) and the second end extends to the middle ring flame hole (122). The second ignition slit (125) and the first ignition slit (124) are spaced apart in the circumferential direction of the middle ring flame cap (12).

10. The gas stove according to any one of claims 1-9, characterized in that, The burner assembly (2) includes a furnace base (21) and three ejector tubes (22). The inner cavities of the three ejector tubes (22) respectively form a central ejector channel (231), a middle ring ejector channel (241), and an outer ring ejector channel (251). The upper end of the furnace base (21) has a central premixing cavity (232), a middle ring premixing cavity (242), and an outer ring premixing cavity (252) arranged sequentially from the inside to the outside. The central gas cavity (111) is vertically connected to the central premixing cavity (232), the middle ring gas cavity (121) is vertically connected to the middle ring premixing cavity (242), and the outer ring gas cavity (131) is vertically connected to the outer ring premixing cavity (252). The central ejector channel (231) is connected to the central premixing chamber (232) and together they form the central gas channel (23); the middle ring ejector channel (241) is connected to the middle ring premixing chamber (242) and together they form the middle ring gas channel (24); the outer ring ejector channel (251) is connected to the outer ring premixing chamber (252) and together they form the outer ring gas channel (25). The ejector tube (22) is detachably connected to the furnace base (21), and / or the furnace base (21) is integrally formed.

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