Gas valve and gas stove

Abstract

The utility model discloses a gas valve, which comprises a valve main body for supplying gas to a burner, and a control component for controlling the gas supply of the valve main body and provided with a plurality of gears, the control component comprises a valve rod assembled on the valve main body and a knob arranged on the valve rod; the valve body is provided with a gear piece, the gear piece is provided with a plurality of gear nodes corresponding to gears of the control component, the valve rod is provided with a gear fixing unit, and the valve rod can rotate around the axis so that the gear fixing unit can be combined with or separated from the different gear nodes. The utility model further discloses a gas stove. The beneficial effects of the utility model lie in that a user has obvious hand feeling feedback in the control process, and the control accuracy of the user is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of gas valve and gas stove, belong to the technical field of kitchen appliances. BACKGROUND

[0002] Gas valve is the important component of control gas flow, its main function is to open or close gas supply according to the operation of user, and adjust the flow size of gas, to realize the accurate control to flame size. On gas stove, gas valve is usually operated by rotating knob, this design not only facilitates user to use, but also can guarantee the security of use.

[0003] At present, in prior art, when rotating control knob, there is no obvious change in hand feeling, it is prone to that rotation angle is too large or too small, thereby leading to the situation that fire control is not accurate, so that user experience is poor. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of gas valve and gas stove, so that user has obvious hand feeling feedback in control process, improve the control accuracy of user.

[0005] The utility model is realized by the following technical solutions.

[0006] A kind of gas valve, including the valve main body that the burner is supplied with gas, control the valve main body gas supply and be equipped with multiple stops control component;

[0007] The control component includes the valve stem assembled in the valve main body, the knob is set on the valve stem;

[0008] The valve main body is provided with stop sheet, it has multiple stop nodes corresponding to the stop of control component, the valve stem is provided with stop unit, the valve stem can rotate around axis, so that the stop unit and different stop nodes are combined or separated.

[0009] As further improvement of the utility model, the control component has the control state that the valve stem can rotate, and the original state that the valve stem cannot rotate, the valve stem can be axially moved, to switch the control state and original state of control component, and be equipped with the valve stem reset elastic member that the valve stem is driven to reset to original state.

[0010] As a further improvement of the utility model, the stop position node is formed by the surface recess of the stop piece, the valve rod is provided with a stop mounting seat, the stop unit is slidingly connected to the stop mounting seat to switch the stop state and the adjustment state, and a stop elastic reset member is arranged to reset the stop unit to the stop state, the stop unit is clamped and fitted with the stop position node in the stop state, and is slidingly fitted with the surface of the stop piece in the adjustment state.

[0011] As a further improvement of the utility model, the valve rod is provided with a radial protruding positioning structure, and the valve rod reset elastic member is sleeved outside the valve rod and supported at both ends on the positioning structure and the stop mounting seat.

[0012] As a further improvement of the utility model, the minimum stop position and the maximum stop position are set in the plurality of stop positions set by the control component, the stop piece has corresponding minimum stop position node and maximum stop position node, and the recess degree of the minimum stop position node and the maximum stop position node is greater than that of the rest stop position nodes.

[0013] As a further improvement of the utility model, the stop mounting seat is provided with a channel penetrating up and down and having a stepped structure, and a plugging structure is arranged at the top of the channel, the stop unit comprises a stop slide rod slidingly connected in the channel, a stop bead arranged at the bottom end of the stop slide rod and capable of being clamped on the stop position node, and a flange structure at the top end of the stop slide rod capable of being supported on the stepped structure, the stop elastic reset member is arranged in the channel, and the two ends thereof support the plugging structure and the flange structure respectively.

[0014] As a further improvement of the utility model, the plugging structure can adjust the position along the extension direction of the channel to change the reset elastic force of the stop elastic reset member.

[0015] As a further improvement of the utility model, the plugging structure and the inner wall of the channel are screw-connected.

[0016] As a further improvement of the utility model, the bottom of the stop slide rod is provided with a mounting hole matched with the shape of the stop bead, and the diameter of the opening of the mounting hole is smaller than the diameter of the stop bead.

[0017] A gas stove comprises a burner and a gas valve for controlling the gas delivered to the burner.

[0018] The utility model has the advantages of:

[0019] When the user rotates the valve rod by rotating the hand control knob, the fixed stop unit and the different stop points can be combined to accurately adjust, so as to accurately control the firepower of the burner. When the fixed stop unit and the stop points change from the combined state to the separated state with the rotation of the valve rod, a sudden feeling is fed back to the user, so that the user can control more accurately. BRIEF DESCRIPTION OF DRAWINGS

[0020] The preferred embodiments of the present application will be described in detail below with reference to the accompanying drawings, so as to help understand the purposes and advantages of the present application.

[0021] Figure 1 is a schematic view of the burner in embodiment 1;

[0022] Figure 2 is a sectional view of the burner in embodiment 1 Figure One ;

[0023] Figure 3 is a sectional view of the burner in embodiment 1 Figure Two ;

[0024] Figure 4 is a sectional view of the inner fire combustion part and the minimum fire combustion part in embodiment 1;

[0025] Figure 5 is a schematic view of the gas valve in embodiment 2;

[0026] Figure 6 is a sectional view of the gas valve in embodiment 2;

[0027] Figure 7 is Figure 6 a partial enlarged schematic view. DETAILED DESCRIPTION

[0028] The present application will be described in further detail below according to the drawings and embodiments.

[0029] In this specification, the orientation terms such as up, down, left, right, front, back, front, back, top, bottom, etc. mentioned or possibly mentioned are defined with respect to the structure shown in the drawings, and the words "inner" and "outer" respectively refer to the direction towards or away from the geometric center of a particular component. They are relative concepts, so they can change accordingly according to their different positions, different use states. Therefore, these or other orientation terms should not be interpreted as restrictive terms.

[0030] Embodiment 1:

[0031] A burner is applied to a gas stove in a kitchen appliance, referring to Figures 1-4It comprises an inner fire gas cavity 11, an outer fire gas cavity 12, an inner fire gas injection pipe 13 and an outer fire gas injection pipe 14, wherein the inner fire gas cavity 11 and the inner fire gas injection pipe 13 are connected, the outer fire gas cavity 12 and the outer fire gas injection pipe 14 are connected, the top of the inner fire gas cavity 11 is arranged with an inner fire hole a, the top of the outer fire gas injection pipe 14 is arranged with an outer fire hole b, and the top of the outer fire gas cavity is arranged around the top of the inner fire gas cavity 11. The high-speed gas is injected into one end of the inner fire gas injection pipe 13 and the outer fire gas injection pipe 14, and under the action of injection, the air outside is sucked in and mixed with the gas. The gas passes through the inner fire gas cavity and the outer fire gas cavity 12, and finally burns at the inner fire hole a to form an inner fire flame and at the outer fire hole b to form an outer fire flame.

[0032] In the embodiment, the inner fire gas cavity 11 has a seamless connection and is arranged with a top of the inner fire hole a, and the outer fire gas cavity 12 has a seamless connection and is arranged with a top of the outer fire hole b. Since the top of the inner fire gas cavity 11 and the outer fire gas cavity 12 is a seamless connection, it eliminates the possibility of gas leakage at the top of the inner fire gas cavity 11 and the outer fire gas cavity 12 outside the inner fire hole a and the outer fire hole b. Compared with the existing technology, the gap caused by long-term use of the burner head and the fire cover leads to gas leakage, which can avoid the loss of combustion efficiency caused by gas leakage and ensure the stability of the combustion state of the burner, avoiding safety hazards.

[0033] In the embodiment, for the structure of the inner fire gas cavity 11 and the outer fire gas cavity 12, the inner fire gas cavity 11 comprises an inner fire gas shell 111 with an opening at the top end and an inner fire combustion part 112 integrally formed at the opening, and the outer fire gas cavity 12 comprises an outer fire gas shell 121 with an opening at the top and an outer fire combustion part 122 integrally formed at the opening. Wherein, the inner fire gas shell 111 and the outer fire gas shell 121 are equivalent to the burner head in the prior art, and the inner fire combustion part 112 and the outer fire combustion part 122 are equivalent to the fire cover in the prior art. Although the seamless connection can also be achieved by heat welding, considering that the materials of the inner fire gas shell 111 and the outer fire gas shell 121 of the burner head and the inner fire combustion part 112 and the outer fire combustion part 122 of the fire cover are different, they have different thermal expansion coefficients, which may cause stress concentration at the welding point, and the welding seam may crack over time, affecting the safety and stability of the burner. Therefore, the one-piece molding method of the embodiment is a more excellent technical solution.

[0034] In the present embodiment, the inner fire gas shell 111 is made of aluminum alloy, the outer fire gas shell 121 is made of aluminum alloy, the inner fire combustion part 112 is made of copper alloy, and the outer fire combustion part 122 is made of copper alloy. The inner fire gas shell 111 and the outer fire gas shell 121 are made of aluminum alloy, and the inner fire combustion part 112 and the outer fire combustion part 122 are made of copper alloy. Since the thermal conductivity of copper alloy is higher than that of aluminum alloy, it means that copper alloy can conduct heat faster. For the inner fire combustion part 112 and the outer fire combustion part 122, it helps to evenly distribute the heat generated by the flame and reduces the risk of local overheating, thereby prolonging the service life and improving safety. In contrast, although the thermal conductivity of aluminum alloy is not as good as that of copper, its good heat dissipation performance is sufficient to meet the functional requirements of the inner fire gas shell 111 and the outer fire gas shell 121, while keeping the cost low.

[0035] More specifically, in one embodiment, the inner fire gas shell 111 and the inner fire combustion part 112 are formed with a joint edge formed by 3D metal printing, and the outer fire gas shell 121 and the outer fire combustion part 122 are formed with a joint edge formed by 3D metal printing, that is, the integration is achieved by the 3D metal printing process.

[0036] More specifically, in another embodiment, the inner fire gas shell 111 and the inner fire combustion part 112 are formed with a joint edge formed by double-metal secondary die casting, and the outer fire gas shell 121 and the outer fire combustion part 122 are formed with a joint edge formed by double-metal secondary die casting, that is, the integration is achieved by the double-metal secondary die casting process.

[0037] Both of the above two embodiments can achieve integration, and compared with the double-metal secondary die casting method, the double-metal secondary die casting method is more cost-effective in production cost.

[0038] In the present embodiment, the inner fire gas cavity 11 extends upward from the bottom end to the top end, that is, the inner fire burner presents a vertical columnar structure as a whole, and more specifically, the outer fire gas shell 121 extends upward from the bottom end to the opening at the top end, and the inner fire combustion part 112 is integrally formed at the opening.

[0039] In the present embodiment, for the outer fire gas shell 121 of the outer fire gas cavity 12, the top of the outer fire gas shell 121 has a plurality of openings spaced apart and independently arranged circumferentially, and each opening is integrally formed with an outer fire combustion part 122, that is, the inner fire combustion part 112 is arranged in a ring around a plurality of independent outer fire combustion parts 122, which can miniaturize the structure of the outer fire combustion part 122, thereby effectively reducing the difficulty and requirements of the production and processing process.

[0040] In the embodiment, the outer fire gas cavity 12 has a main cavity 12a surrounding the inner fire gas cavity 11, a plurality of branch cavity passages 12b circumferentially spaced and connected to the main cavity 12a and extending upward to the top end of the main cavity 12a, and the branch cavity passages 12b form the outer fire combustion part 122 at the top end where the outer fire holes b are arranged. The gas input by the outer fire gas injector 14 first enters the main cavity 12a, and then is divided into a plurality of gas streams by the plurality of branch cavity passages 12b, respectively flows along the corresponding branch cavity passage 12b to the outer fire combustion part 122 and burns at the outer fire hole b. By arranging the plurality of branch cavity passages 12b, the gas can be dispersedly delivered, so that the gas can be uniformly delivered to each outer fire combustion part 122 for combustion. Compared with the outer fire burner head in the prior art which is annular, the gas has less resistance loss in the flow process, thereby improving the flow efficiency of the gas and in turn improving the combustion efficiency. In addition, the plurality of branch cavity passages 12b can play a pressure equalizing role for the flow of the gas, so that the gas divided into each branch cavity passage 12b remains in a uniform state, thereby keeping the flame passage of each outer fire combustion part 122 balanced, which is conducive to maintaining the overall combustion effect.

[0041] In the embodiment, more specifically, the outer fire gas shell 121 extends upward from the bottom end to the opening at the top end, and the lower part of the outer fire gas shell 121 surrounds the outer fire gas shell 121, and the upper part forms a plurality of branches and extends upward to the opening at the top end.

[0042] In the embodiment, for the specific structure of the branch cavity passage 12b, the branch cavity passage 12b extends from the outer side of the upper part of the main cavity 12a and gradually transitions to upward and extends to the outer fire combustion part 122, that is, the branch cavity passage 12b presents an arc-shaped transition tubular structure, which gradually changes the flow direction of the gas, so that the gas can reduce the resistance effect when flowing along the branch cavity passage 12b, thereby improving the flow efficiency of the gas and in turn improving the combustion efficiency of the outer fire combustion part 122.

[0043] In the embodiment, the inner fire gas cavity 11 is formed with a convergent-divergent nozzle structure Ir near the inner fire combustion part 112 at the top end, and the branch cavity passage 12b is formed with a convergent-divergent nozzle structure Ir near the outer fire combustion part 122 at the top end. The cross-sectional area of the convergent-divergent nozzle structure Ir gradually decreases and then gradually increases along the flow direction of the gas. When the gas enters the convergent-divergent nozzle structure Ir, the cross-sectional area of the convergent-divergent nozzle structure Ir first decreases, so the speed of the gas must increase to maintain the same flow rate according to the continuity equation, and the static pressure will decrease at the place where the flow rate increases according to Bernoulli's law. Then the cross-sectional area of the convergent-divergent nozzle structure Ir gradually increases, the speed of the gas begins to slow down and the pressure gradually recovers. This change in speed helps the mixing of the gas and air, thereby improving the injection efficiency at the outer fire hole b and the inner fire hole a and the combustion efficiency.

[0044] In the embodiment, the outer fire combustion part 122 is upwardly convex from its edge to the center, and the outer fire hole b is arranged around the center of the outer fire combustion part 122, so that the gas can be injected in a radial direction around the center of the outer fire combustion part 122 and to the periphery of the outer fire combustion part 122, thereby expanding the coverage of the flame on the outer fire combustion part 122, so that the gas can be fully combusted, thereby improving the combustion efficiency.

[0045] In the embodiment, the inner fire combustion part 112 is formed with a convex region 1121 which is upwardly convex from its edge to the center, and the inner fire hole a is arranged in the convex region 1121, and the outer fire combustion part 122 has the same principle, so that the gas can be injected in a radial direction around the center of the inner fire combustion part 112 and to the periphery of the inner fire combustion part 112, thereby expanding the coverage of the flame on the inner fire combustion part 112, so that the gas can be fully combusted, thereby improving the combustion efficiency.

[0046] In the embodiment, for the inner fire gas injection pipe 13 and the outer fire gas injection pipe 14, the inner fire gas injection pipe 13 penetrates into the outer fire gas cavity 12 and is connected with the inner fire gas cavity 11, and the outer fire gas injection pipe 14 is connected with the main cavity 12a of the outer fire gas cavity 12.

[0047] In the embodiment, the inner fire gas injection pipe 13 and the outer fire gas injection pipe 14 are horizontally arranged and parallel to each other, and the inner fire gas injection pipe 13 and the outer fire gas injection pipe 14 are symmetrically arranged with respect to the outer fire gas cavity 12. The inner fire gas injection pipe 13 has an inner fire gas connecting part 131 which is curvedly formed and connected with the inner fire gas cavity 11, for adjusting the gas inlet direction and directing it to the center of the inner fire gas cavity 11, so that the distribution state of the gas after flowing into the inner fire gas cavity 11 from the inner fire gas connecting part 131 is more uniform, thereby reducing the resistance loss caused by the resistance of the inner wall of the inner fire gas shell 111 during upward flowing, and thereby improving the flow efficiency of the gas and the combustion efficiency at the inner fire combustion part 112. The outer fire gas injection pipe 14 has an outer fire gas connecting part 141 which is curvedly formed and connected with the main cavity 12a, for adjusting the gas inlet direction and directing it to the center of the main cavity 12a, so that the distribution state of the gas after flowing into the inner fire gas cavity 11 from the outer fire gas connecting part 141 is more uniform, which is beneficial to the gas shunting to each branch cavity 12b, and thereby improving the flow efficiency of the gas and the combustion efficiency at the outer fire combustion part 122.

[0048] The burner of the embodiment further comprises a small fire gas pipe 15, a small fire combustion part 151 is arranged at the center of the inner fire combustion part 112, a small fire hole c is arranged on the small fire combustion part 151, and the small fire gas pipe 15 penetrates into the inner fire gas cavity 11 to connect the small fire combustion part 151 and communicate with the small fire hole c.

[0049] In the embodiment, the small fire gas pipe 15 is arranged independently from the inner fire gas cavity 11 and the outer fire gas cavity 12, and the gas can be stably delivered to the small fire combustion part 151 through the small fire gas pipe 15 for combustion. The flame formed at the small fire combustion part 151 is mainly used for minimum fire, i.e., minimum combustion output. When the inner fire combustion part 112 and the outer fire combustion part 122 of the lower burner are both in an off state, the stable delivery of the gas through the small fire combustion pipe and the stable combustion at the small fire combustion part 151 can ensure the stable control of the minimum fire. In the case that the user controls the fire of the burner to be small and the fire is turned off due to improper operation, the user can avoid the trouble of re-ignition, i.e., the small fire combustion part 151 can play the role of priming. That is, the arrangement of the small fire gas pipe 15 and the small fire combustion part 151 can not only stably and reliably maintain the minimum fire of the burner to avoid turning off, but also play the role of priming, avoid the operation trouble of the user due to repeated ignition, and improve the user experience.

[0050] In the embodiment, the small fire gas pipe 15 comprises a first delivery section 15a, a transition section 15b, and a second delivery section 15c. The first delivery section 15a penetrates the outer wall of the outer fire gas cavity 12 and the inner wall of the inner fire gas cavity 11 in sequence and extends into the inner fire gas cavity 11. The transition section 15b connects the first delivery section 15a and the second delivery section 15c and is arc-shaped. The second delivery section 15c extends upward and is connected to the small fire combustion part 151. The arc-shaped transition section 15b can reduce the resistance of the gas delivery, thereby reducing the resistance loss and improving the flow efficiency of the gas, and then improving the combustion efficiency of the small fire combustion part 151.

[0051] In the embodiment, the small fire combustion part 151 is upwardly raised from the edge to the center, the small fire hole c is arranged around the center of the small fire combustion part 151, and the structure of the small fire combustion part 151 is the same as that of the outer fire combustion part 122. Therefore, the gas can be injected in a radial direction around the center of the small fire combustion part 151 and to the periphery of the small fire combustion part 151, so as to expand the coverage of the flame on the small fire combustion part 151, so that the gas can be fully combusted, and then the combustion efficiency is improved.

[0052] In the embodiment, the inner fire combustion part 112 is formed by a raised area 1121 and a lowered area 1122 in sequence from the edge of the inner fire combustion part 112 to the edge of the minimal fire combustion part 151, so as to reduce the height difference between the inner fire hole a and the minimal fire hole c, thereby avoiding the flame at the inner fire combustion part 112 being too far away from the pot bottom, and the flame at the minimal fire combustion part 151 being too close to the pot bottom, so that the arrangement of the flame in the horizontal height is more reasonable, and the collision between the center of the minimal fire combustion part 151 and the pot bottom is also avoided.

[0053] In the embodiment, the gas inlet end of the minimal fire gas pipe 15 is connected to a device for delivering gas, i.e. a gas valve. The outer fire gas injection pipe 14 and the inner fire gas injection pipe 13 of the burner and the nozzle on the gas valve have a gap, the nozzle injects gas into the injection pipe, so that the surrounding air is also sucked in and mixed with the gas, thereby improving the combustion completeness of the inner fire combustion part 112 and the outer fire combustion part 122. Since the minimal fire combustion part 151 is used to maintain the minimum fire of the burner, the requirements for combustion intensity and combustion completeness are very low, so it is not necessary to use the Bernoulli principle to suck in air for mixing as the injection pipe does, and it can be directly connected. The gas is delivered to the minimal fire combustion part 151 through the minimal fire gas pipe 15, and stable and reliable small fire combustion can be achieved. In addition, it should be noted that in the prior art, when the burner is in a small fire state, the flow rate of the gas injected into the injection pipe by the nozzle is slow, and the air suction force is insufficient, which affects the flow state of the gas in the burner, thereby easily causing the phenomenon of fire loss or extinguishing. In the embodiment, since the minimal fire gas pipe 15 is directly connected to the gas valve, this situation can be effectively avoided.

[0054] In the embodiment, the minimal fire gas pipe 15 extends from the gas inlet end to the gas outlet end, and the cross-sectional area remains unchanged. Since the minimal fire gas pipe 15 is directly connected to the device for delivering gas, i.e. the gas valve, its structure does not need to be designed as a Venturi tube shape as the injection pipe, and the cross-sectional area remaining unchanged can improve the stability of the flow state of the gas in the minimal fire gas pipe 15, thereby ensuring that the combustion of the minimal fire combustion part 151 remains stable.

[0055] Embodiment 2:

[0056] A gas valve, with reference to Figures 5-7 , comprising a valve body 21 and a control component. The valve body 21 is used to supply gas to the burner, and the control component is used to control the gas valve.

[0057] In the embodiment, the operating part comprises a valve stem 22 assembled to the valve body 21, and a knob 23 arranged on the valve stem 22, and the user can rotate the valve stem 22 by rotating the knob 23 to determine the size of the combustion firepower of the corresponding burner of the operating part. The valve body 21 is provided with a limiting piece 24 at the top thereof, the top surface of the limiting piece 24 is a plane, and a plurality of limiting points 241 corresponding to the operating part are arranged on the top surface of the limiting piece 24. The valve stem 22 is provided with a limiting unit 25, and the valve stem 22 can rotate around the axis, so that the limiting unit 25 and the different limiting points 241 are combined or separated.

[0058] In the embodiment, when the user rotates the valve stem 22 by rotating the knob 23, the combination of the limiting unit 25 and the different limiting points 241 can accurately adjust the size of the combustion firepower of the burner, so that the user can accurately control the size of the combustion firepower of the burner. When the limiting unit 25 and the limiting points 241 are combined, the user can feel a sudden feeling when the limiting unit 25 and the limiting points 241 are separated, so that the user can accurately control the operating part.

[0059] In the embodiment, the operating part has an operating state in which the valve stem 22 can rotate, and an original state in which the valve stem 22 cannot rotate. In the original state, the user cannot rotate the valve stem 22, so that the user can avoid touching the knob 23 by mistake to change the firepower. The valve stem 22 can move axially to switch the operating state and the original state of the operating part. The operating part is provided with a valve stem reset spring 2a for resetting the valve stem 22 to the original state. More specifically, when the valve stem 22 is in the lowest position, the operating part is in the operating state. When the user releases the knob 23, the valve stem 22 is reset to the highest position under the action of the valve stem reset spring 2a, so that the operating part is in the original state.

[0060] In the embodiment, the gear node 241 is formed by a surface recess of the fixed gear piece 24, and the recess is a circular arc-shaped pit. The valve rod 22 is provided with a fixed gear mounting seat 26, and the fixed gear unit 25 is slidingly connected to the fixed gear mounting seat 26. The fixed gear unit 25 has a fixed gear state and an adjustment state. In the fixed gear state, the fixed gear unit 25 and the gear node 241 are combined. In the adjustment state, the fixed gear unit 25 and the gear node 241 are separated. The fixed gear unit 25 can switch between the fixed gear state and the adjustment state by sliding up and down on the fixed gear mounting seat 26. The fixed gear unit 25 is provided with a fixed gear elastic reset member 2b that drives the fixed gear unit 25 to reset to the fixed gear state. When the fixed gear unit 25 is at the highest position relative to the fixed gear mounting seat 26, it is in the adjustment state. When the fixed gear unit 25 is at the lowest position relative to the fixed gear mounting seat 26, it is in the fixed gear state. When the fixed gear unit 25 is in the fixed gear state, it is clamped and fitted with the gear node 241. When the fixed gear unit 25 is in the adjustment state, it is slidingly fitted with the surface of the fixed gear piece 24. The clamped and fitted fixed gear unit 25 and the gear node can be combined to accurately determine and control the firepower. At the same time, the user can apply a certain force to make the fixed gear unit 25 slide from the pit to the surface of the fixed gear piece 24, i.e., to separate the two.

[0061] In the embodiment, the valve rod 22 is provided with a radial protruding positioning structure 221. The valve rod reset elastic member 2a is sleeved outside the valve rod 22 and supported at both ends on the positioning structure 221 and the fixed gear mounting seat 26. The valve rod reset elastic member 2a is specifically a compression spring. The positioning structure 221 can be a clasp spring or other structure that can be connected to the valve rod 22. The fixed gear mounting seat 26 is not only a mounting component of the fixed gear unit 25, but also a support component of the valve rod reset elastic member 2a, which can simplify the structure of the control component.

[0062] In the embodiment, the control component is provided with a minimum and a maximum among a plurality of settings. The minimum and the maximum have corresponding minimum gear nodes 241 and maximum gear nodes 241. The recess degree of the minimum gear nodes 241 and the maximum gear nodes 241 is greater than that of the remaining gear nodes 241. Therefore, when the user rotates to the maximum and the minimum, the feeling of stopping is more obvious than other gears, which can give the user a more explicit control indication.

[0063] In the embodiment, the fixed stop mounting base 26 is provided with a through channel 261 extending from top to bottom and having a stepped structure 262, the stepped structure 262 is configured such that the caliber of the upper half of the channel 261 is smaller than that of the lower half, and the channel 261 is provided with a blocking structure 263 at the top, so that the top end of the channel 261 is blocked, and the bottom end forms an opening at the bottom of the fixed stop mounting base 26, the fixed stop unit 25 includes a fixed stop slide rod 251 slidingly connected in the channel 261, a fixed stop bead 252 arranged at the bottom end of the fixed stop slide rod 251 and capable of being clamped on the gear node 241, and the top end of the fixed stop slide rod 251 is provided with a flange structure 253 capable of being supported on the stepped structure 262, so that the stepped structure 262 defines the lowest position of the fixed stop bead 252, and a fixed stop elastic return member 2b is arranged in the channel 261 and has two ends respectively supported on the blocking structure 263 and the flange structure 253, when the user presses the button to make the control part change from the initial state to the control state, and rotates the knob 23, the fixed stop bead 252 gradually comes out of the current gear node, the valve rod elastic return member 2a is constantly compressed, and the fixed stop bead 252 slides on the surface of the fixed stop plate 24, when the fixed stop bead 252 slides to the next gear node, the fixed stop bead 252 is clamped in the gear node under the elastic force of the valve rod elastic return member 2a.

[0064] In the embodiment, the blocking structure 263 can be adjusted in position along the extension direction of the channel 261, so as to change the distance between the blocking structure 263 and the stepped structure 262, change the initial compression amount of the fixed stop elastic return member 2b, and change the reset elastic force of the fixed stop elastic return member 2b, so that the user can adaptively adjust according to his own preference.

[0065] In the embodiment, more specifically, the blocking structure 263 is threadedly connected with the inner wall of the channel 261, the user can adjust the position of the blocking structure 263 in the channel 261 by rotating the blocking structure 263, and the user can conveniently adjust.

[0066] In the embodiment, the bottom of the fixed stop slide rod 251 is provided with a mounting hole 2511 matching the shape of the fixed stop bead 252, and the diameter of the opening of the mounting hole 2511 is smaller than the diameter of the fixed stop bead 252, so that the fixed stop bead 252 cannot come out of the mounting hole 2511, and the fixed stop bead 252 can roll on the surface of the fixed stop plate 24, and the resistance is smaller than the sliding movement, and the user has a more smooth feeling when rotating the control.

[0067] The gas valve in this embodiment has a valve body 21 with a minimum flame gas outlet 253, an inner flame gas nozzle 251, and an outer flame gas nozzle 252. The minimum flame gas outlet 253 is connected to the minimum flame gas pipe 15. The inner flame gas nozzle 251 injects gas into the inner flame gas ejector pipe 13, and the outer flame gas nozzle 252 injects gas into the outer flame gas ejector pipe 14.

[0068] Implementation Case 3:

[0069] A gas stove includes a burner and a gas valve, wherein the burner is as shown in Embodiment 1 and the gas valve is as shown in Embodiment 2.

[0070] In this embodiment, when the control components of the gas valve are in their minimum position, the minimum flame combustion section 151 is in a combustion state, while the inner flame combustion section 112 and the outer flame combustion section 122 are in a extinguished state. That is, in the minimum position, the minimum flame gas outlet 253 of the valve body 21 continuously supplies gas into the minimum flame gas pipe 15, while the inner flame gas nozzle 251 and the outer flame gas nozzle 252 stop injecting gas into the inner flame gas ejector pipe 13 and the outer flame gas ejector pipe 14.

[0071] In this embodiment, both the inner flame combustion section 112 and the outer flame combustion section 122 of the minimum burner are in an extinguished state. The stable gas supply through the minimum flame combustion tube and the stable combustion at the minimum flame combustion section 151 ensure stable control of the minimum flame. This prevents the flame from going out due to improper operation when the user reduces the burner flame to the minimum flame, and also effectively avoids the trouble of the user having to re-ignite in this situation, thus serving as an ignition point.

[0072] In this embodiment, when the control component is in any gear from the maximum to the intermediate gear, the outer flame combustion section 122 and the inner flame combustion section 112 are in a burning state. When the control component is in other gears, the outer flame combustion section 122 is in a extinguished state, and the inner flame combustion section 112 is in a burning state. The miniature flame combustion section 151 is in a extinguished state at least when the control component is in any gear from the maximum to the intermediate gear. As for the gears between the intermediate and the minimum gears, the miniature flame combustion section 151 can burn when the gear is lower, and the miniature flame combustion section 151 is extinguished when the gear is lowered so that the inner flame combustion section 112 can maintain a stable burning state.

[0073] Finally, it should be noted that: the above implementation cases are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing implementation cases, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing implementation cases, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the implementation cases of the present application.

Claims

1. A gas valve, characterized in that The valve body (21) supplies gas to the burner, the control component controls the gas supply of the valve body (21) and sets multiple gears; The control component includes a valve stem (22) assembled on the valve body (21), and a knob (23) arranged on the valve stem (22); The valve body (21) is provided with a gear sheet having multiple gear nodes (241) corresponding to the gears of the control component, and the valve stem (22) is provided with a gear setting unit (25), and the valve stem (22) can rotate around an axis, so that the gear setting unit (25) and different gear nodes (241) are combined or separated.

2. Gas valve according to claim 1, characterized in that The control component has a control state in which the valve stem (22) can rotate, and an original state in which the valve stem (22) cannot rotate, the valve stem (22) can be axially moved to switch the control state and the original state of the control component, and is provided with a valve stem reset spring (2a) for driving the valve stem (22) to reset to the original state.

3. Gas valve according to claim 2, characterized in that The gear node (241) is formed by a surface recess of the gear sheet (24), the valve stem (22) is provided with a gear mounting seat (26), the gear setting unit (25) is slidingly connected to the gear mounting seat (26) to switch its gear setting state and adjustment state, and is provided with a gear reset spring (2b) for driving the gear setting unit (25) to reset to the gear setting state, the gear setting unit (25) is in gear setting state and is clamped and fitted with the gear node (241), and is in adjustment state and is slidingly fitted with the surface of the gear sheet (24).

4. Gas valve according to claim 3, characterized in that The valve stem (22) is provided with a radial protruding positioning structure (221), the valve stem reset spring (2a) is sleeved outside the valve stem (22), and two ends are respectively supported on the positioning structure (221) and the gear mounting seat (26).

5. Gas valve according to claim 3, characterized in that Among the multiple gears set by the control component, the minimum gear and the maximum gear are set, the gear sheet has corresponding minimum gear node and maximum gear node, and the recess degree of the minimum gear node and the maximum gear node is greater than that of the remaining gear nodes (241).

6. Gas valve according to claim 3, characterized in that The gear mounting seat (26) is provided with a channel (261) penetrating up and down and having a stepped structure (262), and is provided with a blocking structure (263) at the top of the channel (261), the gear setting unit (25) includes a gear sliding rod (251) slidingly connected in the channel (261), a gear ball (252) arranged at the bottom end of the gear sliding rod (251) and capable of being clamped on the gear node (241), and the top end of the gear sliding rod (251) has a flange structure (253) capable of being supported on the stepped structure (262), and the gear reset spring (2b) is arranged in the channel (261), and two ends thereof are respectively supported on the blocking structure (263) and the flange structure (253).

7. Gas valve according to claim 6, characterized in that The blocking structure (263) can adjust the position along the extension direction of the channel (261) to change the reset spring force of the gear reset spring (2b).

8. Gas valve according to claim 7, characterized in that The blocking structure (263) and the inner wall of the channel (261) are threadedly connected.

9. The gas valve of claim 6, wherein, The bottom of the stopper slide rod (251) is provided with a mounting hole (2511) matching the shape of the stopper bead (252), and the diameter of the opening of the mounting hole (2511) is smaller than the diameter of the stopper bead (252).

10. A gas hob, characterized in that A gas valve according to any one of claims 1 to 9 for controlling the delivery of gas to a burner.

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