Gas stove

Abstract

The invention discloses a gas stove which comprises a burner, an inner fire burning part provided with inner fire holes, an outer fire burning part surrounding the inner fire burning part and provided with outer fire holes, and an extremely-small fire gas pipe, and the center of the inner fire burning part is provided with an extremely-small fire burning part; the extremely-low fire gas pipe extends into the combustor and is connected with the extremely-low fire combustion part, and extremely-low fire holes communicated with the extremely-low fire gas pipe are formed in the extremely-low fire combustion part; the gas valve comprises a valve main body for supplying gas to the burner and a control component for controlling the gas supply of the valve main body, the control component is provided with a minimum gear, and under the minimum gear, the extremely-small fire burning part is in a burning state, and the inner fire burning part and the outer fire burning part are in a flameout state. The control method has the beneficial effects that the phenomenon of blow-off or flameout is avoided, and the control difficulty of a user for adjusting the soft fire is reduced.

Description

Technical Field

[0001] The invention relates to a gas stove and belongs to the technical field of kitchen appliances. Background Art

[0002] Gas stoves are common cooking equipment in modern kitchens. They heat pots by burning gas. The gas valve is an important component for controlling the gas flow. Its main function is to open or close the gas supply according to the user's operation and adjust the gas flow to achieve precise control of the flame size. The burner is where the gas mixes with the air and burns. It is the key part for converting chemical energy into thermal energy. The gas valve sprays gas to the burner's ejector pipe through the nozzle.

[0003] In the prior art, users control the firepower of the burner by controlling the gas valve. In many application scenarios, users need to use a low fire for cooking. When the burner is in a low fire state, the flow rate of the gas injected from the nozzle into the injection tube is slow, and the suction force on the air is insufficient, which will affect the flow state of the gas in the burner, making it easy for the fire to be out of control or flameout. In addition, when the user controls the gas valve to adjust the firepower, the low fire is also very difficult to control, and it is easy for improper control to cause the flameout directly. Summary of the invention

[0004] The object of the present invention is to provide a gas stove which can avoid the phenomenon of flameout or flameout and reduce the control difficulty of users in adjusting a low flame.

[0005] The present invention is achieved through the following technical solutions.

[0006] A gas stove, comprising:

[0007] A burner having an inner fire combustion part with inner fire holes arranged therein, an outer fire combustion part surrounding the inner fire combustion part and with outer fire holes arranged therein, and a very small fire gas pipe, wherein a very small fire combustion part is arranged at the center of the inner fire combustion part, the very small fire gas pipe extends into the burner and is connected to the very small fire combustion part, and the very small fire combustion part is arranged with very small fire holes connected to the very small fire gas pipe;

[0008] The gas valve comprises a valve body for supplying gas to the burner and a control component for controlling the gas supply of the valve body. The control component is set with a minimum gear, and at the minimum gear, the extremely small fire combustion part is in a burning state, and the inner fire combustion part and the outer fire combustion part are in a flameout state.

[0009] As a further improvement of the present invention, the burner comprises an inner fire gas chamber having the inner fire combustion part, an inner fire ejection pipe connected to the inner fire gas chamber, an outer fire gas chamber having the outer fire combustion part, and an outer fire ejection pipe connected to the outer fire gas chamber;

[0010] The gas valve has a very small fire gas outlet connected to the very small fire gas pipe and outputting gas thereto, an inner fire gas nozzle spraying gas toward the inlet of the inner fire injector pipe, and an outer fire gas nozzle spraying gas toward the inlet of the outer fire injector pipe.

[0011] As a further improvement of the present invention, the very small fire gas pipe extends from one end connected to the very small fire gas outlet to one end connected to the very small fire combustion part, and its cross-sectional area remains unchanged.

[0012] As a further improvement of the present invention, the control component is set with multiple gears with gradually increasing firepower, and the multiple gears are set with a minimum gear, an intermediate gear and a maximum gear;

[0013] When the control component is in any gear position from the maximum gear position to the middle gear position, the outer fire combustion part and the inner fire combustion part are in a burning state, and when the control component is in other gear positions, the outer fire combustion part is in a flameout state and the inner fire combustion part is in a burning state;

[0014] The extremely small fire burning portion is in a flameout state at least when the control component is in any gear position from the maximum gear position to the middle gear position.

[0015] As a further improvement of the present invention, the control component includes a valve stem assembled on the valve body and a knob arranged on the valve stem;

[0016] The valve stem can move axially to switch the control state and the original state of the control component, and is equipped with a valve stem reset elastic member for driving the valve stem to reset to the original state;

[0017] The valve body is provided with a gear plate, which has a plurality of gear nodes corresponding to the gear positions of the control component. The valve stem is provided with a fixed gear unit. The valve stem can rotate around the axis in the control state, so that the fixed gear unit is combined or released with different gear nodes.

[0018] As a further improvement of the present invention, the gear node is formed by a depression on the surface of the fixing piece, a fixing mounting seat is provided on the valve stem, the fixing unit is slidably connected to the fixing mounting seat to switch its fixing state and adjustment state, and is provided with a fixing elastic reset member for driving the fixing unit to reset to the fixing state, the fixing unit is engaged with the gear node when in the fixing state, and is slidably engaged with the surface of the fixing piece when in the adjustment state.

[0019] As a further improvement of the present invention, the extremely small fire burning portion bulges upward from its edge toward the center, and the extremely small fire holes are arranged around the center of the extremely small fire burning portion.

[0020] As a further improvement of the present invention, the inner fire combustion portion forms an upwardly raised area and a downwardly sunken area from its edge to the edge of the extremely small fire combustion portion, which is used to reduce the height difference between the inner fire hole and the extremely small fire hole.

[0021] As a further improvement of the present invention, the inner fire gas chamber extends upward from its bottom end to its top end to form the inner fire combustion portion, and the outer fire gas chamber includes a main cavity surrounding the inner fire gas chamber, a plurality of circumferentially spaced branch cavities connected to the main cavity and extending upward to its top end to form the outer fire combustion portion.

[0022] As a further improvement of the present invention, a reduction tube structure is formed at the inner fire combustion portion near the top of the inner fire gas chamber and at the outer fire combustion portion near the top of the branch cavity, and the cross-sectional area of ​​the reduction tube structure gradually decreases and then gradually increases along the gas flow direction.

[0023] Beneficial effects of the present invention:

[0024] When the inner fire combustion part and the outer fire combustion part of the minimum burner are both in a flameout state, the stable delivery of gas in the extremely small fire combustion tube and the stable combustion in the extremely small fire combustion part can ensure stable control of the minimum firepower, and can prevent the flameout due to improper operation when the user controls to reduce the burner firepower to a low fire, and can also effectively avoid the trouble of the user needing to ignite again in this case, that is, it plays the role of ignition. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings to help understand the purpose and advantages of the present invention, wherein:

[0026] Figure 1 is a schematic diagram of a burner in implementation case 1;

[0027] Figure 2 A cross-sectional view of the burner in Example 1 Figure 1 ;

[0028] Figure 3 A cross-sectional view of the burner in Example 1 Figure 2 ;

[0029] Figure 4 It is a cross-sectional schematic diagram of the inner fire combustion part and the extremely small fire combustion part in implementation case 1;

[0030] Figure 5 It is a schematic diagram of the gas valve in implementation case 2;

[0031] Figure 6 It is a cross-sectional schematic diagram of the gas valve in implementation case 2;

[0032] Figure 7 for Figure 6 A partial enlarged schematic diagram of . DETAILED DESCRIPTION

[0033] The present invention is further described in detail below based on the accompanying drawings and implementation examples.

[0034] The directional terms such as up, down, left, right, front, back, front, back, top, bottom, etc. mentioned or may be mentioned in this specification are defined relative to the structures shown in the drawings. The words "inside" and "outside" refer to the direction toward or away from the geometric center of a specific component, respectively. They are relative concepts, and therefore may change accordingly according to different locations and different usage conditions. Therefore, these or other directional terms should not be interpreted as restrictive terms.

[0035] Implementation Case 1:

[0036] A burner, used in a gas stove in a kitchen appliance, referring to Figure 1-Figure 4 , which includes an inner fire gas chamber 11, an outer fire gas chamber 12, an inner fire gas ejection pipe 13 and an outer fire gas ejection pipe 14, wherein the inner fire gas chamber 11 is connected to the inner fire gas ejection pipe 13, the outer fire gas chamber 12 is connected to the outer fire gas ejection pipe 14, the top of the inner fire gas chamber 11 is arranged with an inner fire hole a, the top of the outer fire gas ejection pipe 14 is arranged with an outer fire hole b, and the top of the outer fire gas chamber is arranged around the top of the inner fire gas chamber 11. Gas is ejected at high speed from one end of the inner fire gas ejection pipe 13 and the outer fire gas ejection pipe 14, and the outside air is sucked in and mixed with the gas under the ejection effect, and the gas passes through the inner fire gas chamber and the outer fire gas chamber 12, and finally burns at the inner fire hole a to form an inner flame and burns at the outer fire hole b to form an outer flame.

[0037] In this embodiment, the inner fire gas chamber 11 has a seamlessly connected top with inner fire holes a, and the outer fire gas chamber 12 has a seamlessly connected top with outer fire holes b. Since the tops of the inner fire gas chamber 11 and the outer fire gas chamber 12 are seamlessly connected, the possibility of gas leakage is eliminated outside the inner fire holes a and the outer fire holes b. Compared with the gas leakage caused by the gaps between the burner head and the fire cover in the prior art after long-term use, the loss of combustion energy efficiency caused by gas leakage can be avoided, and the stability of the combustion state of the burner can be ensured to avoid safety hazards.

[0038] In this embodiment, for the structure of the inner fire gas chamber 11 and the outer fire gas chamber 12, the inner fire gas chamber 11 includes an inner fire gas shell 111 with an opening at the top and an inner fire combustion part 112 formed integrally at the opening, and the outer fire gas chamber 12 includes an outer fire gas shell 121 with an opening at the top and an outer fire combustion part 122 formed integrally at the opening. Among them, the inner fire gas shell 111 and the outer fire gas shell 121 are equivalent to the burner 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 there is another way to achieve seamless connection, thermal welding, however, considering that the materials of the inner fire gas shell 111 and the outer fire gas shell 121 of the burner and the inner fire combustion part 112 and the outer fire combustion part 122 of the fire cover are different and have different thermal expansion coefficients, this may cause stress concentration at the welding point, causing cracks in the weld over time, affecting the safety and stability of the burner, so the one-piece molding method of this embodiment is a more excellent technical solution.

[0039] In this embodiment, the inner fire gas shell 111 is set as an aluminum alloy inner fire gas shell 111, the outer fire gas shell 121 is set as an aluminum alloy outer fire gas shell 121, the inner fire combustion part 112 is set as a copper alloy inner fire combustion part 112, and the outer fire combustion part 122 is set as a copper alloy outer fire combustion part 122. The inner fire gas shell 111 and the outer fire gas shell 121 of the stove head are made of aluminum alloy, and the inner fire combustion part 112 and the outer fire combustion part 122 of the fire cover are made of copper alloy. Since the thermal conductivity of copper alloy is higher than that of aluminum alloy, this means that copper alloy can conduct heat faster. For the inner fire combustion part 112 and the outer fire combustion part 122 of the fire cover, this helps to evenly distribute the heat generated by the flame and reduce the risk of local overheating, thereby extending the service life and improving safety. In contrast, although the thermal conductivity of aluminum alloy is not as good as 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 of the stove head while maintaining a low cost.

[0040] More specifically, in one embodiment, the inner fire gas shell 111 and the inner fire combustion part 112 are formed with a connecting edge formed by 3D metal printing, and the outer fire gas shell 121 and the outer fire combustion part 122 are formed with a connecting edge formed by 3D metal printing, that is, an integrated connection is achieved through the 3D metal printing process.

[0041] More specifically, in another embodiment, the inner fire gas shell 111 and the inner fire combustion part 112 are formed with a connecting edge formed by bimetallic secondary die-casting, and the outer fire gas shell 121 and the outer fire combustion part 122 are formed with a connecting edge formed by bimetallic secondary die-casting, that is, an integrated connection is achieved through a bimetallic secondary die-casting process.

[0042] Both of the above two implementations can achieve integrated connection. In comparison, the bimetallic secondary die-casting method has lower production costs.

[0043] In this embodiment, the inner fire gas chamber 11 extends upward from the bottom end to its top end, that is, the inner fire burner as a whole presents an upright columnar structure. More specifically, the outer fire gas shell 121 extends upward from its bottom end to the opening at its top end, and the inner fire combustion part 112 is integrally formed at the opening.

[0044] In the present embodiment, for the outer fire gas shell 121 of the outer fire gas chamber 12, the top of the outer fire gas shell 121 has a plurality of openings which are circumferentially spaced from each other and independently arranged, and an outer fire combustion portion 122 is integrally formed at each opening, so that a plurality of independent outer fire combustion portions 122 are arranged around the inner fire combustion portion 112, which can miniaturize the structure of the outer fire combustion portion 122, thereby effectively reducing the difficulty and requirements of the production and processing technology.

[0045] In this embodiment, the outer fire combustion chamber 12 has a main chamber 12a surrounding the inner fire combustion chamber 11, and a plurality of circumferentially spaced branch chambers 12b connected to the main chamber 12a and extending upward to the top thereof. The branch chambers 12b form an outer fire combustion portion 122 at the top where outer fire holes b are arranged. The gas input by the external fire gas injection pipe 14 first enters the main cavity 12a, and then is diverted by multiple branch cavities 12b to form multiple streams of gas, which flow along the corresponding branch cavities 12b to the external fire combustion section 122 and burn at the external fire hole b. By setting up multiple branch cavities 12b, the gas can be transported in a dispersed manner, so that the gas can be evenly transported to each external fire combustion section 122 for combustion. Compared with the annular external fire burner head in the prior art, the gas encounters less resistance loss during the circulation process, thereby improving the gas circulation efficiency and then improving the combustion efficiency; and, the multiple branch cavities 12b can play a role in equalizing the pressure of the gas circulation, so that the gas diverted to each branch cavity 12b remains in a uniform state, so that the flame cavity of each external fire combustion section 122 remains balanced, which is beneficial to the maintenance of the overall combustion effect.

[0046] In this embodiment, more specifically, the outer fire gas shell 121 extends upward from its bottom end to an opening at its top end, the lower part of the outer fire gas shell 121 surrounds the outer fire gas shell 121, and the upper part forms multiple branches and extends upward to the opening at its top end.

[0047] In the present embodiment, with regard to the specific structural setting of the branch cavity 12b, the branch cavity 12b extends from the outer side of the upper part of the main cavity 12a and its extension direction gradually transitions to upward and extends to the outer fire combustion part 122, that is, the branch cavity 12b presents a tubular structure with an arc-shaped transition, which gradually changes the flow direction of the gas, so that the gas can reduce the resistance when flowing along the branch cavity 12b, thereby improving the circulation efficiency of the gas, and then improving the combustion efficiency of the outer fire combustion part 122.

[0048] In this embodiment, the inner fire combustion part 112 near the top of the inner fire combustion chamber 11 and the outer fire combustion part 122 near the top of the branch cavity 12b are both formed with a contraction structure 1r, and the cross-sectional area of ​​the contraction structure 1r gradually decreases and then gradually increases along the flow direction of the gas. When the gas enters the contraction structure 1r, since the cross-sectional area of ​​the contraction structure 1r decreases first, according to the continuity equation, the speed of the gas must increase to maintain the same flow rate. At the same time, according to Bernoulli's law, the static pressure will decrease where the flow rate increases; then the cross-sectional area of ​​the contraction structure 1r gradually increases, the gas speed begins to slow down, and the pressure gradually recovers. This change in speed helps the mixing of gas and air, and then improves the injection efficiency and combustion efficiency at the outer fire hole b and the inner fire hole a.

[0049] In this embodiment, the outer fire combustion portion 122 bulges upward from its edge toward the center, and the outer fire holes b are arranged around the center of the outer fire combustion portion 122, so that the gas can surround the center of the outer fire combustion portion 122 and be sprayed in a radial direction toward the periphery of the outer fire combustion portion 122, thereby expanding the coverage range of the flame on the outer fire combustion portion 122, allowing the gas to be fully burned, thereby improving the combustion efficiency.

[0050] In the present embodiment, the inner fire combustion section 112 is formed with an upwardly raised area 1121 from its edge, and the inner fire hole a is arranged in the raised area 1121, which is the same principle as the outer fire combustion section 122, so that the gas can surround the center of the inner fire combustion section 112 and be sprayed in a radial direction toward the inner periphery of the inner fire combustion section 112, thereby expanding the coverage range of the flame on the inner fire combustion section 112, allowing the gas to be fully burned, and then improving the combustion efficiency.

[0051] In the present embodiment, for the inner fire gas ejection pipe 13 and the outer fire gas ejection pipe 14, the inner fire gas ejection pipe 13 extends into the outer fire gas cavity 12 and is connected to the inner fire gas cavity 11, and the outer fire gas ejection pipe 14 is connected to the main cavity 12a of the outer fire gas cavity 12.

[0052] In this embodiment, the inner fire gas ejector pipe 13 and the outer fire gas ejector pipe 14 are arranged horizontally and parallel to each other, and the inner fire gas ejector pipe 13 and the outer fire gas ejector pipe 14 are symmetrical about the outer fire gas chamber 12 in terms of positional relationship. The inner fire gas ejector pipe 13 has an inner fire gas connection portion 131 which is bent and connected to the inner fire gas chamber 11, and is used to adjust the gas intake direction and point it to the center of the inner fire gas chamber 11, so that the gas is distributed more evenly after flowing from the inner fire gas connection portion 131 into the inner fire gas chamber 11, thereby reducing the resistance loss caused by the resistance on the inner wall of the inner fire gas shell 111 during the upward flow process, thereby improving the gas circulation efficiency and the combustion efficiency at the inner fire combustion portion 112. The outer fire gas ejector pipe 14 has an outer fire gas connection portion 141 which is bent and connected to the main cavity 12a, and is used to adjust the gas intake direction and direct it to the center of the main cavity 12a, so that the gas is distributed more evenly after flowing from the outer fire gas connection portion 141 into the inner fire gas cavity 11, which is beneficial for diverting the gas to each branch cavity 12b, thereby improving the gas circulation efficiency and improving the combustion efficiency at the outer fire combustion portion 122.

[0053] The burner of this embodiment also includes a very small fire gas pipe 15. The inner fire combustion part 112 is provided with a very small fire combustion part 151 at the center thereof. The very small fire combustion part 151 is provided with a very small fire hole c. The very small fire gas pipe 15 extends into the inner fire gas cavity 11 to connect with the very small fire combustion part 151 and communicates with the very small fire hole c.

[0054] In this embodiment, the extremely small fire gas pipe 15 is independently arranged outside the inner fire gas chamber 11 and the outer fire gas chamber 12. The extremely small fire gas pipe 15 can stably transport the gas to the extremely small fire combustion part 151 for combustion. The flame formed at the extremely small fire combustion part 151 is mainly used for the minimum firepower, that is, the minimum combustion output. At the minimum, the inner fire combustion part 112 and the outer fire combustion part 122 of the burner are both in a flameout state. Through the stable transportation of the gas of the extremely small fire combustion pipe and the stable combustion at the extremely small fire combustion part 151, the stable control of the minimum firepower can be ensured, and the situation that the flameout is caused by improper operation when the user controls to reduce the burner firepower to a small fire can be avoided, and the trouble of the user needing to ignite again in this case can be effectively avoided, that is, it plays the role of ignition. In other words, the setting of the extremely small fire gas pipe 15 and the extremely small fire combustion part 151 can not only stably and reliably maintain the minimum firepower of the burner to avoid flameout, but also play the role of ignition, avoiding the user's trouble of repeated ignition operations, and improving the user's experience.

[0055] In the present embodiment, the very small fire gas pipe 15 includes a first conveying section 15a, a transition section 15b and a second conveying section 15c, wherein the first conveying section 15a sequentially passes through the outer wall of the outer fire gas chamber 12 and the inner wall of the inner fire gas chamber 11 and extends into the interior of the inner fire gas chamber 11, the transition section 15b connects the first conveying section 15a and the second conveying section 15c and transitions in an arc shape, the second conveying section 15c extends upward and is connected to the very small fire combustion section 151, and the transition section 15b with an arc shape can reduce the resistance encountered during gas transportation, thereby reducing the bottom resistance loss and improving the gas circulation efficiency, thereby improving the combustion efficiency at the very small fire combustion section 151.

[0056] In this embodiment, the extremely small fire burning section 151 bulges upward from its edge toward the center, and the extremely small fire holes c are arranged around the center of the extremely small fire burning section 151. The structure of the extremely small fire burning section 151 is the same as that of the outer fire burning section 122, so that the gas can surround the center of the extremely small fire burning section 151 and be sprayed toward the periphery of the extremely small fire burning section 151 in a radial direction, thereby expanding the coverage range of the flame on the extremely small fire burning section 151, allowing the gas to be fully burned, thereby improving the combustion efficiency.

[0057] In the present embodiment, the inner fire burning section 112 forms, from its edge to the edge of the extremely small fire burning section 151, a raised area 1121 that bulges upward and a sunken area 1122 that sinks downward, for reducing the height difference between the inner fire hole a and the extremely small fire hole c, thereby preventing the flame at the inner fire burning section 112 from being too far from the bottom of the pot, while the flame at the extremely small fire burning section 151 is closer to the bottom of the pot, making the horizontal arrangement of the flame more reasonable, and also preventing the horizontal height of the center of the extremely small fire burning section 151 from being too high and colliding with the bottom of the pot.

[0058] In this embodiment, the air inlet end of the extremely small fire gas pipe 15 is used to connect the device for conveying gas, namely the gas valve. There is a gap between the outer fire gas ejector pipe 14 of the burner and the inner fire gas ejector pipe 13 and the nozzle on the gas valve. The nozzle sprays the gas into the ejector 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 section 112 and the outer fire combustion section 122. Since the extremely small fire combustion section 151 is used to maintain the minimum firepower of the burner, the requirements for combustion intensity and combustion completeness are very low. Therefore, it is not necessary to use the Bernoulli principle to inhale air for mixing like the ejector pipe. It can be directly connected. The gas is transported to the extremely small fire combustion section 151 through the extremely small fire gas pipe 15 to achieve stable and reliable small fire combustion. In addition, it should be noted that in the prior art, when the burner is in a low-fire state, the flow rate of the gas injected from the nozzle into the injector tube is slow, and the suction force on the air is insufficient, which will affect the circulation state of the gas in the burner, thereby easily causing flameout or flameout. In the present embodiment, since the extremely low-fire gas pipe 15 is directly connected to the gas valve, this situation can be effectively avoided.

[0059] In the present embodiment, the very small fire gas pipe 15 extends from the air inlet end to the air outlet end, and its cross-sectional area remains unchanged. Since the very small fire gas pipe 15 is directly connected to the equipment for conveying gas, namely the gas valve, its structure does not need to be set to a Venturi tube shape like an ejector tube. The unchanged cross-sectional area can improve the stability of the gas circulation state in the very small fire gas pipe 15, thereby ensuring that the combustion of the very small fire combustion section 151 remains stable.

[0060] Implementation Case 2:

[0061] A gas valve, referring to Figure 5-Figure 7 , including a valve body 21 and a control component. The valve body 21 is used to supply gas to the burner, the burner is as shown in the implementation example 1, and the control component is used to control the gas valve.

[0062] In this embodiment, the control component includes a valve stem 22 mounted on the valve body 21 and a knob 23 disposed on the valve stem 22. The user can rotate the control valve stem 22 through the knob 23 to determine the combustion firepower of the control component and the corresponding burner of the control component. The valve body 21 is provided with a stop plate 24 on its top. The top surface of the stop plate 24 is a plane. The top surface of the stop plate 24 has a plurality of gear nodes 241 corresponding to the control component. The valve stem 22 is provided with a stop unit 25. The valve stem 22 can rotate around the axis so that the stop unit 25 and different gear nodes 241 are combined or separated.

[0063] In this embodiment, when the user manually turns the valve stem 22 with the knob 23 for rotational adjustment, the fixed gear unit 25 and the different gear nodes 241 can be precisely adjusted in combination, so that the firepower of the burner can be precisely controlled. As the valve stem 22 rotates, the fixed gear unit 25 and the gear node 241 change from a combined state to a separated state, which will provide feedback to the user with a jerky feel, thereby making the user's control more precise.

[0064] In this embodiment, 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. In the original state, the user cannot rotate the valve stem 22, which can prevent the user from accidentally touching the knob 23 and causing the firepower to change. The valve stem 22 can move axially to switch the control state and the original state of the control component. The control component is equipped with a valve stem reset elastic member 2a that drives the valve stem 22 to reset to the original state. More specifically, the valve stem 22 is in the control state when it is in the lowest position. When the user releases the knob 23, it is reset to the highest position under the action of the valve stem reset elastic member 2a, that is, the control component is in the original state.

[0065] In this embodiment, the gear node 241 is formed by a depression on the surface of the gear plate 24, and the depression is specifically formed into an arc-shaped pit. A gear mounting seat 26 is provided on the valve stem 22, and the gear unit 25 is slidably connected to the gear mounting seat 26. The gear unit 25 has a gear state and an adjustment state. The gear state is that the gear unit 25 and the gear node 241 are in a combined state, and the adjustment state is that the gear unit 25 and the gear node 241 are in a separated state. The gear unit 25 can switch its gear state and adjustment state by sliding up and down on the gear mounting seat 26. The gear unit 25 is equipped with a gear elastic reset member 2b that drives the gear unit 25 to reset to the gear state. When the gear unit 25 is in the highest position relative to the gear mounting seat 26, it is in the adjustment state, and when the gear unit 25 is in the lowest position relative to the gear mounting seat 26, it is in the gear state. The gear unit 25 is engaged with the gear node 241 when in the gear setting state, and is slidably engaged with the surface of the gear piece 24 when in the adjustment state. The gear unit 25 can be combined with the gear node through the engagement, so as to achieve more accurate determination to control the firepower. At the same time, the user can apply a certain force to make the gear unit 25 slide from the pit to the surface of the gear piece 24, so that the two are separated.

[0066] In this embodiment, a radially protruding positioning structure 221 is provided on the valve stem 22, the valve stem reset elastic member 2a is sleeved on the outside of the valve stem 22, and the two ends are respectively supported on the positioning structure 221 and the fixed gear mounting seat 26. The valve stem reset elastic member 2a is specifically configured as a compression spring, and the positioning structure 221 can be configured as a structure such as a retaining spring that can be connected to the valve stem 22. The fixed gear mounting seat 26 not only serves as an installation component of the fixed gear unit 25, but also can serve as a supporting component of the valve stem reset elastic member 2a, which can simplify the structure of the operating component.

[0067] In the present embodiment, a minimum and a maximum are set among the multiple settings of the control component, and the piece has a corresponding minimum gear node 241 and a maximum gear node 241, and the degree of depression of the minimum gear node 241 and the maximum gear node 241 is greater than that of the other gear nodes 241. Therefore, when the user rotates to the maximum and minimum, the sense of frustration in the hand is more obvious than other feelings, which can give the user clearer control instructions.

[0068] In this embodiment, the fixed-gear mounting seat 26 is provided with a channel 261 which is through from top to bottom and has a step structure 262. The step structure 262 makes the diameter of the upper part of the channel 261 smaller than that of the lower part. A blocking structure 263 is provided at the top of the channel 261, so that the top of the channel 261 is blocked and the bottom forms an opening at the bottom of the fixed-gear mounting seat 26. The fixed-gear unit 25 includes a fixed-gear slide bar 251 which is slidably connected in the channel 261, a fixed-gear bead 252 which is provided at the bottom of the fixed-gear slide bar 251 and can be clamped on the gear node 241, and the top of the fixed-gear slide bar 251 has a support structure which can be supported on the step structure 263. 2, so the step structure 262 limits the lowest position of the fixing bead 252, the fixing elastic reset member 2b is arranged in the channel 261, and its two ends respectively support the blocking structure 263 and the flange structure 253, when the user presses the button to make the control component change from the initial state to the control state, as the user turns the knob 23, the fixing bead 252 gradually escapes from the current gear node, the valve stem reset elastic member 2a is continuously compressed, and the fixing bead 252 slides on the surface of the fixing plate 24, when the fixing bead 252 slides to the next gear node, under the elastic force of the valve stem reset elastic member 2a, the fixing bead 252 is embedded in the gear node.

[0069] In this embodiment, the blocking structure 263 can adjust its position along the extension direction of the channel 261, thereby changing the distance between the blocking structure 263 and the step structure 262, and changing the initial compression amount of the fixed-position elastic return member 2b, thereby changing the return elastic force of the fixed-position elastic return member 2b, so that users can make adaptive adjustments according to their preferences.

[0070] In this embodiment, more specifically, the blocking structure 263 and the inner wall of the channel 261 are threadedly connected, and the user can adjust the position of the blocking structure 263 in the channel 261 by rotating the blocking structure 263, which is convenient for the user to adjust.

[0071] In this embodiment, a mounting hole 2511 matching the shape of the fixing bead 252 is provided at the bottom of the fixing slide rod 251, and the diameter of the opening of the mounting hole 2511 is smaller than the diameter of the fixing bead 252, so that the fixing bead 252 will not fall out of the mounting hole 2511, and the fixing bead 252 can roll on the surface of the fixing plate 24, which has less resistance than the sliding movement mode, and the user feels smoother when rotating and operating.

[0072] The gas valve of this embodiment has a valve body 21 with a very small fire gas outlet 253, an inner fire gas nozzle 251, and an outer fire gas nozzle 252, wherein the very small fire gas outlet 253 is connected to the very small fire gas pipe 15, the inner fire gas nozzle 251 sprays gas into the inner fire gas injection pipe 13, and the outer fire gas nozzle 252 sprays gas into the outer fire gas injection pipe 14.

[0073] Implementation Case 3:

[0074] A gas stove includes a burner and a gas valve, wherein the burner is as shown in Implementation Example 1, and the gas valve is as shown in Implementation Example 2.

[0075] In this embodiment, when the control component of the gas valve is at the minimum position, the extremely small fire combustion part 151 is in a burning state, and the inner fire combustion part 112 and the outer fire combustion part 122 are in a flameout state. That is, at the minimum position, the extremely small fire gas outlet 253 of the valve body 21 continuously inputs gas into the extremely small fire gas pipe 15, while the inner fire gas nozzle 251 and the outer fire gas nozzle 252 stop spraying gas to the inner fire gas injection pipe 13 and the outer fire gas injection pipe 14.

[0076] In the present embodiment, the inner fire combustion section 112 and the outer fire combustion section 122 of the minimum lower burner are both in a flameout state. Through the stable delivery of gas from the extremely small fire combustion tube and the stable combustion at the extremely small fire combustion section 151, stable control of the minimum lower firepower can be ensured. When the user controls to reduce the burner firepower to a low fire, the flameout caused by improper operation can be avoided, and the trouble of the user needing to ignite again in this case can be effectively avoided, that is, it plays the role of ignition.

[0077] In this embodiment, the outer fire burning part 122 and the inner fire burning part 112 are in a burning state when the control part is in any gear from the maximum gear to the middle gear, and the outer fire burning part 122 is in a flameout state and the inner fire burning part 112 is in a burning state when the control part is in other gears. The extremely small fire burning part 151 is in a flameout state at least when the control part is in any gear from the maximum gear to the middle gear. As for between the middle gear and the minimum gear, the extremely small fire burning part 151 can burn when the gear is smaller, and the extremely small fire burning part 151 is extinguished when the gear that allows the inner fire burning part 112 to stably burn is lowered.

[0078] Finally, it should be noted that the above implementation cases are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned implementation cases, those skilled in the art should understand that they can still modify the technical solutions recorded in the aforementioned implementation cases, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the implementation cases of the present invention.

Claims

1. A gas stove, characterized in that: include: A burner, comprising an inner fire combustion part (112) arranged with an inner fire hole (a), an outer fire combustion part (122) surrounding the inner fire combustion part (112) and arranged with an outer fire hole (b), and a very small fire gas pipe (15), wherein a very small fire combustion part (151) is arranged at the center of the inner fire combustion part (112), the very small fire gas pipe (15) extends into the burner and is connected to the very small fire combustion part (151), and the very small fire combustion part (151) is arranged with a very small fire hole (c) connected to the very small fire gas pipe (15); A gas valve comprises a valve body (21) for supplying gas to the burner and a control component for controlling the gas supply of the valve body (21); the control component is set with a minimum gear, and at the minimum gear, the extremely small fire combustion part (151) is in a combustion state, and the inner fire combustion part (112) and the outer fire combustion part (122) are in a flameout state.

2. The gas stove according to claim 1, characterized in that: The burner comprises an inner fire combustion chamber (11) having the inner fire combustion portion (112), an inner fire ejector pipe connected to the inner fire combustion chamber (11), an outer fire combustion chamber (12) having the outer fire combustion portion (122), and an outer fire ejector pipe connected to the outer fire combustion chamber (12); The gas valve comprises a very small fire gas outlet (253) connected to the very small fire gas pipe (15) and outputting gas thereto, an inner fire gas nozzle (251) spraying gas toward the inlet of the inner fire ejector pipe, and an outer fire gas nozzle (252) spraying gas toward the inlet of the outer fire ejector pipe.

3. The gas stove according to claim 2, characterized in that: The very small fire gas pipe (15) extends from one end connected to the very small fire gas outlet (253) to one end connected to the very small fire combustion part (151), and its cross-sectional area remains unchanged.

4. The gas stove according to claim 2, characterized in that: The control component is set with a plurality of gears with gradually increasing firepower, and the plurality of gears are set with a minimum gear, an intermediate gear and a maximum gear; When the control component is in any gear position from the maximum gear position to the middle gear position, the outer fire combustion part (122) and the inner fire combustion part (112) are in a burning state; when the control component is in other gear positions, the outer fire combustion part (122) is in a flameout state and the inner fire combustion part (112) is in a burning state; The extremely small flame burning portion (151) is in a flameout state at least when the control component is in any gear position from the maximum gear position to the middle gear position.

5. The gas stove according to claim 1, characterized in that: The control component comprises a valve stem (22) assembled on the valve body (21) and a knob (23) arranged on the valve stem (22); The valve stem (22) can move axially to switch the control state and the original state of the control component, and is provided with a valve stem reset elastic member (2a) for driving the valve stem (22) to reset to the original state; The valve body (21) is provided with a gear plate, which has a plurality of gear nodes (241) corresponding to the gear positions of the control component. The valve stem (22) is provided with a fixed gear unit (25). The valve stem (22) can rotate around an axis in a control state, so that the fixed gear unit (25) and different gear nodes (241) are combined or released.

6. The gas stove according to claim 5, characterized in that: The gear position node (241) is formed by a depression on the surface of the fixed gear piece (24); a fixed gear mounting seat (26) is provided on the valve stem (22); the fixed gear unit (25) is slidably connected to the fixed gear mounting seat (26) to switch its fixed gear state and adjustment state, and is provided with a fixed gear elastic reset member (2b) for driving the fixed gear unit (25) to reset to the fixed gear state; the fixed gear unit (25) is engaged with the gear position node (241) when in the fixed gear state, and is slidably engaged with the surface of the fixed gear piece (24) when in the adjustment state.

7. The gas stove according to claim 1, characterized in that: The extremely small fire burning portion (151) bulges upward from its edge toward the center, and the extremely small fire holes (c) are arranged around the center of the extremely small fire burning portion (151).

8. The gas stove according to claim 7, characterized in that: The inner fire burning portion (112) forms, from its edge to the edge of the extremely small fire burning portion (151), a raised area (1121) that rises upward and a lowered area (1122) that sinks downward, in sequence, for reducing the height difference between the inner fire hole (a) and the extremely small fire hole (c), and the inner fire hole (a) is arranged in the raised area (1121).

9. The gas stove according to claim 2, characterized in that: The inner fire combustion chamber (11) extends upward from its bottom end to its top end to form the inner fire combustion portion (112), and the outer fire combustion chamber (12) comprises a main chamber (12a) surrounding the inner fire combustion chamber (11), and a plurality of branch chambers (12b) spaced circumferentially and connected to the main chamber (12a) and extending upward to its top end to form the outer fire combustion portion (122).

10. The gas stove according to claim 9, characterized in that: A shrinkage tube structure (1r) is formed at the inner fire combustion portion (112) near the top of the inner fire combustion chamber (11) and at the outer fire combustion portion (122) near the top of the branch chamber (12b), and the cross-sectional area of ​​the shrinkage tube structure (1r) gradually decreases and then gradually increases along the flow direction of the gas.

Images