CN219841039U - Premixed air-fuel ratio valve and kitchen range - Google Patents

Abstract

The application provides a premixed air-fuel ratio valve and a stove. Wherein, a premixed air-fuel ratio valve includes: the shell is internally provided with a first chamber, a second chamber and a third chamber, the side part of the shell is respectively provided with an air inlet communicated with the second chamber and an air outlet communicated with the third chamber, the first chamber is positioned at the top side of the second chamber and is communicated with the second chamber through a first opening, and the first chamber and the second chamber are respectively communicated with the third chamber through the side parts; the first inlet end or the outlet end of the venturi tube is communicated with the fan, and the second inlet end of the venturi tube is communicated with the air outlet; a first flow regulating assembly, built into the first chamber, comprising: the first diaphragm is connected to the first chamber in a floating mode, the shape and the size of the first diaphragm are matched with those of a cross section of the first chamber perpendicular to the longitudinal direction, and the first diaphragm can float up and down along the longitudinal direction relative to the first chamber through air pressure change of the first chamber so as to change the opening between the first opening and the first diaphragm.

Description

Premixed air-fuel ratio valve and kitchen range

Technical Field

The application relates to the technical field of kitchen range products, in particular to a premixed air-fuel ratio example valve and a kitchen range.

Background

The combustion of the gas cooker needs air combustion supporting, and the mixing proportion and the mixing degree of the gas determine the combustion degree of the gas. When the mixing proportion of air and gas is optimal, the gas is combusted fully, the generated heat value is highest, and the generated waste gas and harmful gas after combustion are minimized, thereby achieving the purposes of high efficiency, energy saving and environmental protection.

The inner and outer rings of the household kitchen range on the market commonly adopt a natural injection primary air combustion structure, the air inflow of the household kitchen range depends on the arrangement of an air quantity regulating switch, insufficient combustion phenomena such as Huang Huo and the like are easy to occur, a structure for supplementing primary air by adopting a blower is also available in the latest research products on the market, but the two structures are difficult to lead the kitchen range fuel gas and air in the full power range to achieve ideal mixing proportion, so the combustion effect is poor. The existing commercial wall-mounted furnace adopts a full-premix combustion structure, the pneumatic proportional valve is driven by the pressure generated by the fan to perform gas proportional adjustment, and the air-fuel ratio is maintained constant by the adjusting mechanism arranged on the valve.

However, the wall-mounted stove is limited in structure, so that the wall-mounted stove is large in size, and the minimum power of the wall-mounted stove is close to the maximum power of the household stove. At present, an air-fuel ratio valve applied to full premix combustion of a low-power household kitchen range is lacking in the market. Therefore, how to realize full premix combustion of a low-power household kitchen range is a technical problem to be solved in the current kitchen range industry.

Disclosure of Invention

The embodiment of the utility model aims to provide a premixed air-fuel ratio valve and a kitchen range so as to realize full premixed combustion of a low-power household kitchen range.

In order to solve the technical problems, the embodiment of the utility model provides the following technical scheme:

a first aspect of the present utility model provides a premixed air-fuel ratio valve, the premixed air-fuel ratio valve including: the shell is internally provided with a first chamber, a second chamber and a third chamber, the side part of the shell is respectively provided with an air inlet communicated with the second chamber and an air outlet communicated with the third chamber, the first chamber is positioned at the top side of the second chamber and is communicated with the second chamber through a first opening, and the first chamber and the second chamber are respectively communicated with the third chamber through the side parts; the first inlet end or the outlet end of the venturi tube is communicated with the fan, and the second inlet end of the venturi tube is communicated with the air outlet; a first flow regulating assembly, built into the first chamber, comprising: the first diaphragm is connected to the first chamber in a floating manner, the shape and the size of the first diaphragm are matched with those of the cross section of the first chamber perpendicular to the longitudinal direction, and the first diaphragm can float up and down along the longitudinal direction relative to the first chamber through the air pressure change of the first chamber so as to change the opening between the first opening and the first diaphragm; and a second flow regulating assembly, built into the second chamber, comprising: the valve core is connected to the isolation seat in a floating mode and penetrates through the second opening, a first vent hole penetrating through the valve core is formed in the upper portion of the isolation seat in the longitudinal direction, the second diaphragm is sleeved on the valve core and located above the communicating position of the second cavity and the third cavity, the shape and the size of the second diaphragm are matched with the shape and the size of the cross section of the second cavity perpendicular to the longitudinal direction so as to divide the second cavity into a first cavity and a second cavity in the longitudinal direction, the first cavity is communicated with the second cavity through the first vent hole, and the second diaphragm can drive the valve core to vertically float relative to the second opening in the longitudinal direction through pressure difference change of the first cavity and the second cavity so as to change the opening between the second opening and the valve core.

In some modified embodiments of the first aspect of the present application, a first mounting groove is formed on the top side of the housing at a position corresponding to the second chamber, the first opening is formed at the bottom of the first mounting groove, and the side part of the first mounting groove is communicated with the third chamber; the first flow regulating assembly further comprises: an end cover mounted on the top side of the housing and closing the first mounting groove to form a first chamber; the first mounting seat is mounted on the first opening, and a second ventilation hole which penetrates through the first mounting seat and is communicated with the first opening is formed in the first mounting seat along the longitudinal direction; and the first floating spring extends longitudinally, and two ends of the first floating spring are respectively connected with the first mounting seat and the bottom of the first diaphragm.

In some variations of the first aspect of the present application, the first flow regulating assembly further comprises: the top of the end cover is longitudinally provided with a first screw hole penetrating through the end cover, and the first adjusting screw is in threaded connection with the first screw hole; and the adjusting spring extends longitudinally and is respectively connected with the bottom of the first adjusting screw and the top of the first diaphragm at two ends.

In some variations of the first aspect of the present application, the second flow regulating assembly further comprises: the second installation seat is arranged at the bottom side of the isolation seat, the second installation seat is a shell with at least one third vent hole at the side part, the top of the second installation seat is communicated with the second opening through an opening, and the air inlet is communicated with the first cavity through at least one third vent hole and the second opening; and the second floating spring extends longitudinally, and two ends of the second floating spring are respectively connected with the valve core and the inner wall of the bottom of the second mounting seat.

In some variations of the first aspect of the present application, the end cap is provided with at least one conduit interface in communication with the first cavity for communication with the first inlet end of the venturi.

In some variations of the first aspect of the present application, the premixed air-fuel ratio valve further comprises: the inside of shell still has the fourth cavity, and the second mounting groove that runs through the shell is seted up to the position that the top side of shell corresponds the fourth cavity, and the outside intercommunication of fourth cavity and shell is passed through the second mounting groove, and the bottom of fourth cavity is passed through the third opening and is linked together with the second cavity, and the lateral part and the air inlet intercommunication of fourth cavity, the subassembly is cut off in the air inlet run through the second mounting groove and part is located the fourth cavity, and it includes: the electromagnetic coil is arranged above the second mounting groove and seals the second mounting groove, and the electromagnetic coil longitudinally winds and extends and is electrically connected with the power supply; the fixed iron core is arranged in the coiling center of the electromagnetic coil and is fixed with the end part of the electromagnetic coil, which is far away from the second mounting groove; the movable iron core is arranged in the coiling center of the electromagnetic coil, is positioned below the fixed iron core and is spaced from the fixed iron core by a preset distance; and a closing member connected to the moving iron core and located below the moving iron core; the movable iron core can drive the closing piece to longitudinally reciprocate relative to the electromagnetic coil through electromagnetic induction so as to open and close the third opening.

In some modified embodiments of the first aspect of the present application, the moving core is divided into, in order from top to bottom in the longitudinal direction: the top of the second movable iron core is connected with the bottom of the first movable iron core through a first compression spring; the closure is divided into: the first closing piece is connected with the first movable iron core and is positioned below the second movable iron core, the top of the first closing piece is propped against the bottom of the electromagnetic coil through the second compression spring, and the second closing piece is connected to the bottom of the second movable iron core.

In some variations of the first aspect of the present application, the premixed air-fuel ratio valve further comprises: the gas outlet regulation subassembly is installed in the third cavity, and it includes: the top side of the third chamber is provided with a fourth opening penetrating through the shell longitudinally, and the second adjusting screw penetrates through the fourth opening and is rotationally connected with the bottom of the third chamber; the adjusting piece is longitudinally provided with a second screw hole which penetrates through the adjusting piece and is matched with the second adjusting screw, is connected with the second adjusting screw through the second screw hole and can longitudinally reciprocate between a first position and a second position relative to the air outlet; the pre-tightening spring is sleeved on the second adjusting screw, and two ends of the pre-tightening spring are respectively abutted with the top inner wall of the third chamber and the top side of the adjusting piece; when the regulating piece is positioned at the first position, the regulating piece completely closes the air outlet, and when the regulating piece is positioned at the second position, the regulating piece completely exposes the air outlet.

In some modified embodiments of the first aspect of the present application, the third chamber is provided with a limit rib corresponding to the position of the adjusting member and adapted to the external dimension of the adjusting member.

A second aspect of the present application provides a cooktop, comprising: any one of the above first aspects of the present application provides a premixed air-fuel ratio valve.

Compared with the prior art, when the premixed air-fuel ratio valve is in an initial state, namely when the air inlet is not filled with fuel gas, the valve core in the second flow regulating assembly seals the second opening of the isolation seat, the second diaphragm divides the second cavity into a first cavity and a second cavity which are not communicated with each other from top to bottom, after the fuel gas is input into the second cavity through the air inlet, the fuel gas can be firstly sent into the first cavity above the second cavity through the first vent hole of the valve core in the second cavity, then the fuel gas enters the first cavity through the first opening and enters the third cavity from the side part of the first cavity, finally enters the second inlet end of the venturi tube through the air outlet, and is mixed with air introduced from the first inlet end of the venturi tube and then discharged from the outlet end of the venturi tube. When the gas is discharged from the gas outlet, the internal air pressure of the first chamber communicated with the gas outlet through the third chamber is changed to generate pressure difference, the pressure difference can change the opening before the first diaphragm and the first opening, so that the flow rate of the gas flowing into the first chamber from the first opening is changed, when the opening between the first diaphragm and the first opening is gradually reduced, the first cavity air pressure above the second chamber is increased, the second diaphragm drives the valve core to move downwards, the valve core can not completely seal the second opening on the isolation seat, a part of the gas in the second chamber enters the first chamber through the first vent hole on the valve core, then enters the third chamber through the first chamber, finally enters the venturi tube through the gas outlet to be mixed with the air, and the other part of the gas directly enters the third chamber through the second opening of the isolation seat and then enters the venturi tube through the gas outlet to be mixed with the air. According to the premixed air-fuel ratio valve provided by the application, the upper position and the lower position of the first diaphragm in the first flow regulating assembly and the second diaphragm in the second flow regulating assembly are changed through the change of the air pressure in the shell when the fuel gas circulates, so that the opening degree of the communication part of the first cavity and the second cavity in the shell is controlled, the adjustment of the fuel gas flow is realized, and the fuel gas with different flow rates can be fully mixed with air after entering the venturi tube. The premixed air-fuel ratio valve provided by the application has a compact structure, and the aperture of the first vent hole of the valve core in the second flow regulating component ensures the maximum combustion power, so that the premixed air-fuel ratio valve is suitable for household small-sized stoves with the combustion power lower than 5.23 kW.

Drawings

The above, as well as additional purposes, features, and advantages of exemplary embodiments of the present utility model will become readily apparent from the following detailed description when read in conjunction with the accompanying drawings. In the drawings, wherein like or corresponding reference numerals indicate like or corresponding parts, there are shown by way of illustration, and not limitation, several embodiments of the utility model, in which:

FIG. 1 is a schematic diagram of a premixed air-fuel ratio valve according to an embodiment of the present utility model;

FIG. 2 shows an enlarged partial schematic view of the structure of part A of FIG. 1;

FIG. 3 shows an enlarged partial schematic view of the structure of part B of FIG. 1;

FIG. 4 is a schematic view showing an axial structure of an angle of a housing of a premix air-fuel ratio valve according to an embodiment of the utility model;

FIG. 5 is a schematic view showing an axial side structure of another angle of a housing of a premix air-fuel ratio valve according to an embodiment of the utility model;

FIG. 6 is a schematic diagram showing a cross-sectional view of a structure of a housing of a premix air-fuel ratio valve according to an embodiment of the utility model;

FIG. 7 is a schematic view showing an axial structure of an end cover of a premixed air-fuel ratio valve according to an embodiment of the utility model;

FIG. 8 is a schematic diagram showing a state in which a second opening in a second flow rate adjusting assembly of a premixed air-fuel ratio valve according to an embodiment of the present utility model is opened;

Fig. 9 is a schematic view showing a state in which the first closing member and the second closing member close the third opening in the intake cut-off assembly of the premixed air-fuel ratio example valve according to the first embodiment of the utility model.

Reference numerals illustrate:

1. a housing; 101. a first chamber; 101a, a first mounting groove; 101b, a first opening; 102. a second chamber; 102a, a first cavity; 102b, a second cavity; 103. a third chamber; 103a, fourth openings; 103b, limit ribs; 104. a fourth chamber; 104a, a second mounting groove; 104b, a third opening; 105. an air inlet; 106. an air outlet; 2. a venturi tube; 201. a first inlet end; 202. a second inlet end; 203. a throat; 204. an outlet end; 3. a first membrane; 4. a separation seat; 401. a second opening; 5. a valve core; 501. a first vent hole; 6. a second membrane; 7. an end cap; 701. a first screw hole; 702. a pipeline interface; 8. a first mount; 801. a second vent hole; 9. a first floating spring; 10. a first adjusting screw; 11. an adjusting spring; 12. a second mounting base; 1201. a third vent hole; 13. a second floating spring; 14. an electromagnetic coil; 15. fixing an iron core; 16. a first moving core; 17. a first closure; 18. a second moving core; 19. a second closure; 20. a first compression spring; 21. a second compression spring; 22. a second adjusting screw; 23. an adjusting member; 24. and (5) pre-tightening the spring.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

It is noted that unless otherwise indicated, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this utility model belongs.

Example 1

Referring to fig. 1 to 6 and 8, a first embodiment of the present utility model proposes a premixed air-fuel ratio valve including: the casing 1, its inside has first cavity 101, second cavity 102 and third cavity 103, its lateral part has offered the air inlet 105 communicated with second cavity 102 and air outlet 106 communicated with third cavity 103 separately, the first cavity 101 locates at the top side of the second cavity 102 and communicates with second cavity 102 through the first opening 101b, the first cavity 101 and second cavity 102 communicate with third cavity 103 separately through the lateral part; a venturi tube 2, a first inlet end 201 or an outlet end 204 of which is used for communicating with a fan, and a second inlet end 202 of which is communicated with the air outlet 106; a first flow regulating assembly, built into the first chamber 101, comprising: the first diaphragm 3, the first diaphragm 3 is connected to the first chamber 101 in a floating manner, and the shape and the size of the first diaphragm 3 are matched with the shape and the size of a cross section of the first chamber 101 perpendicular to the longitudinal direction, and the first diaphragm 3 can float up and down along the longitudinal direction relative to the first chamber 101 through the air pressure change of the first chamber 101 so as to change the opening degree between the first opening 101b and the first diaphragm 3; and a second flow regulating assembly, built into the second chamber 102, comprising: the isolation seat 4, the valve core 5 and the second diaphragm 6, the isolation seat 4 is installed in the second cavity 102 and is located below the communication position of the second cavity 102 and the third cavity 103, a second opening 401 penetrating through the isolation seat 4 is formed in the middle of the isolation seat along the longitudinal direction, the valve core 5 is connected to the isolation seat 4 in a floating mode and penetrates through the second opening 401, a first vent hole 501 penetrating through the valve core 5 is formed in the upper portion of the isolation seat along the longitudinal direction, the second diaphragm 6 is sleeved on the valve core 5 and is located above the communication position of the second cavity 102 and the third cavity 103, the shape and the size of the cross section of the second cavity 102 perpendicular to the longitudinal direction are matched to divide the second cavity 102 into a first cavity 102a and a second cavity 102b, the first cavity 102a is communicated with the second cavity 102b through the first vent hole 501, and the second diaphragm 6 can drive the valve core 5 to float up and down along the longitudinal direction relative to the second opening 401 through pressure difference change opening degree between the second opening 401 and the valve core 5.

Specifically, the premixed air-fuel ratio valve comprises a shell 1, wherein the shell 1 is an integrally formed shell or a shell formed by welding a plurality of shells in a combined mode, an opening is formed in the bottom of the shell, and a bottom plate can be connected through bolts to close the opening. The inside of the shell 1 is provided with a first chamber 101, a second chamber 102 and a third chamber 103, the first chamber 101 is positioned above the second chamber 102, the bottom of the first chamber 101 is provided with a first opening 101b, the first chamber 101 can be communicated with the second chamber 102 through the first opening 101b, the third chamber 103 is positioned at the side part of the first chamber 101 and the second chamber 102 and can be respectively communicated with the first chamber 101 and the second chamber 102, the side part of the shell 1 is also provided with an air inlet 105 communicated with the second chamber 102 and an air outlet 106 communicated with the third chamber 103, the air inlet 105 is used for being communicated with a gas pipeline so as to introduce gas into the inside of the shell 1, the air outlet 106 is communicated with a second inlet 202 of the venturi 2 so as to introduce gas into the venturi 2, a fan can be externally connected with a first inlet 201 of the venturi 2 or externally connected with an outlet 204 of the venturi 2, so that air can be introduced into the venturi 2 from the first inlet 201 of the venturi 2, and can be mixed with the second inlet 202 of the venturi 2 and then introduced into the outlet 204 of the venturi 2.

Specifically, a first flow rate adjusting assembly is disposed in the first chamber 101 of the housing 1, and a second flow rate adjusting assembly is disposed in the second chamber 102. The first diaphragm 3 in the first flow adjusting assembly is adapted to the shape and size of the first chamber 101 so that the first chamber 101 can be longitudinally isolated and the first opening 101b can be covered, the first diaphragm 3 is connected in the first chamber 101 in a floating mode, and when the air pressure on the upper side and the lower side of the first diaphragm 3 changes, the first diaphragm 3 can float up and down relative to the first opening 101b under the action of the air pressure difference so as to change the covering opening between the first diaphragm and the first opening 101 b. The second flow regulating assembly includes: the valve comprises an isolation seat 4, a valve core 5 and a second diaphragm 6, wherein the isolation seat 4 is arranged below a communication part of the second chamber 102 and the third chamber 103, a second opening 401 is formed in the middle of the isolation seat 4 along the longitudinal direction, the valve core 5 is connected with the isolation seat 4 in a floating mode and penetrates through the second opening 401, a first vent hole 501 penetrating the valve core is formed in the upper portion of the isolation seat along the longitudinal direction, the second diaphragm 6 is sleeved on the valve core 5 and is positioned above the communication part of the second chamber 102 and the third chamber 103, the shape and the size of the second diaphragm 6 are matched with the shape and the size of the second chamber 102 to divide the isolation seat into a first cavity 102a and a second cavity 102b along the longitudinal direction, the first cavity 102a is positioned on the top side of the second diaphragm 6, the second cavity 102b is positioned on the bottom side of the second diaphragm 6, when an air pressure difference is generated between the first cavity 102a and the second cavity 102b, the second diaphragm 6 can float up and down to change the opening degree between the valve core 5 and the second opening 401, and when the air pressure difference between the first cavity 102a and the second cavity 102b does not exist or the air pressure difference is smaller than the second floating pressure difference 13, the valve core can seal the second diaphragm opening 401.

According to the above list, in the initial state, i.e., when the gas inlet 105 is not filled with gas, the valve core 5 in the second flow regulating assembly closes the second opening 401 of the isolation seat 4, the second diaphragm 6 separates the second chamber 102 from top to bottom into the first cavity 102a and the second cavity 102b which are not communicated with each other, after gas is introduced into the second chamber 102 through the gas inlet 105, the gas is firstly introduced into the first cavity 102a above the second chamber 102 through the first vent 501 of the valve core 5 in the second cavity 102, then the gas enters the first chamber 101 through the first opening 101b and enters the third chamber 103 from the side of the first chamber 101, finally enters the second inlet end 202 of the venturi tube 2 through the gas outlet 106, and is discharged from the outlet end 204 of the venturi tube 2 after being mixed with air introduced into the first inlet end 201 of the venturi tube 2. When the rotation speed of the fan communicated with the venturi tube 2 changes, the air pressure of the cavities on the upper side and the lower side of the first diaphragm 3 in the first chamber 101 communicated with the air outlet 106 through the third chamber 103 changes to generate a pressure difference, the pressure difference can change the opening before the first diaphragm 3 and the first opening 101b, so that the flow rate of the fuel gas flowing into the first chamber 101 from the first opening 101b is changed, when the opening between the first diaphragm 3 and the first opening 101b is gradually reduced, the air pressure of the first cavity 102a above the second chamber 102 rises, the second diaphragm 6 drives the valve core 5 to move downwards, so that the second opening 401 on the isolation seat 4 cannot be completely sealed by the valve core 5, one part of the fuel gas in the second chamber 102 enters the first chamber 101 through the first vent 501 on the valve core 5, enters the third chamber 103 through the first opening 101b, finally enters the venturi tube 2 through the air outlet 106 to be mixed with the air, and the other part of the fuel gas directly enters the third chamber 103 through the second opening 401 of the isolation seat 4, and then enters the venturi tube 2 through the air outlet 106 to be mixed with the air. The premixed air-fuel ratio valve provided by the application can change the air pressure change of the upper side and the lower side of the first diaphragm 3 in the first cavity 101 by controlling the rotating speed of the fan, so as to generate air pressure difference, and the opening degree between the first diaphragm 3 and the first opening 101b is controlled by the air pressure difference, so that the pressure difference between the first cavity 102a and the second cavity 102b of the upper side and the lower side of the second diaphragm 6 in the second cavity 102 is changed, so that the opening degree between the valve core 5 and the second opening 401 is changed, and the adjustment of the air flow is realized, so that the air can be fully mixed with the air after the air with different flow flows enter the venturi tube 2.

Further, referring to fig. 1, fig. 2, and fig. 4 to fig. 7, in the premixed air-fuel ratio valve according to the first embodiment of the present utility model, in a specific implementation, a first installation groove 101a is formed at a position corresponding to the second chamber 102 on the top side of the housing 1, a first opening 101b is formed at the bottom of the first installation groove 101a, and a side portion of the first installation groove 101a is communicated with the third chamber 103; the first flow regulating assembly further comprises: an end cap 7 mounted to the top side of the housing 1 and closing the first mounting groove 101a to form a first chamber 101; a first mounting seat 8 mounted on the first opening 101b, and having a second vent hole 801 extending through the first mounting seat 8 and communicating with the first opening 101b, longitudinally formed thereon; and a first floating spring 9 extending in the longitudinal direction and having both ends connected to the first mount 8 and the bottom of the first diaphragm 3, respectively.

Specifically, in order to realize floating connection of the first membrane 3 in the first chamber 101, in the technical scheme adopted by the utility model, a first mounting groove 101a is formed in the top side of the housing 1 corresponding to the position of the second chamber 102, a first opening 101b is formed in the bottom of the first mounting groove 101a, the side part of the first mounting groove 101a is communicated with the third chamber 103, an end cover 7 for closing the first mounting groove 101a to form the first chamber 101 is mounted on the top side of the housing 1, a first mounting seat 8 is mounted on the first opening 101b at the bottom of the first mounting groove 101a, a second ventilation hole 801 which penetrates the first mounting seat and is communicated with the first opening 101b is formed in the upper side of the first mounting seat along the longitudinal direction, a first floating spring 9 is sleeved on the first mounting seat 8, and the other end of the first floating spring 9 is sleeved on the bottom of the first membrane 3. When the air pressure in the first chamber 101 is the standard air pressure, the first floating spring 9 can be in a free state, so that the fuel gas enters the first chamber 101 from the opening between the second vent hole 801 on the first mounting seat 8 and the first diaphragm 3, enters the third chamber 103 from the first chamber 101, and finally enters the venturi tube 2 from the air outlet 106; when the fuel gas in the third chamber 103 flows into the venturi tube 2 through the air outlet 106, under the action of the fluid generated by the fan drive, the air pressure of the cavities on the upper side and the lower side of the first diaphragm 3 is changed to generate an air pressure difference, and the first diaphragm 3 drives the first floating spring 9 to stretch under the action of the air pressure difference, so that the opening degree between the first diaphragm 3 and the second ventilation hole 801 on the first mounting seat 8 is changed, and the flow rate of the fuel gas entering the first chamber 101 through the second ventilation hole 801 is changed.

Further, referring to fig. 1, fig. 2, and fig. 4 to fig. 6, in a premixed air-fuel ratio valve according to an embodiment of the present utility model, in a specific implementation, the first flow adjusting assembly further includes: the top of the end cover 7 is longitudinally provided with a first screw hole 701 penetrating through the end cover 7, and the first adjusting screw 10 is in threaded connection with the first screw hole 701; and an adjusting spring 11 extending in a longitudinal direction and having both ends connected to the bottom of the first adjusting screw 10 and the top of the first diaphragm 3, respectively.

Specifically, in order to realize the adjustable flow of the fuel gas flowing out of the second ventilation hole 801 of the first mounting seat 8 in the first flow adjusting assembly, in the technical scheme adopted by the utility model, the top of the end cover 7 is longitudinally provided with the first screw hole 701 penetrating the end cover and communicated with the first chamber 101, the first adjusting screw 10 is in threaded connection with the first screw hole 701, the bottom of the first adjusting screw is sleeved with the adjusting spring 11, the other end of the adjusting spring 11 is sleeved at the top of the first diaphragm 3, the pre-pressure of the adjusting spring 11 on the first diaphragm 3 can be increased or decreased by rotating the first adjusting screw 10, so that the pre-pressure difference between the first floating spring 9 and the adjusting spring 11 is changed, and the pressure difference between the first diaphragm 3 when floating up and down is changed, so that the purpose of adjusting the opening degree between the first diaphragm 3 and the second ventilation hole 801 of the first mounting seat 8 is realized.

Further, referring to fig. 1, 3 to 6 and 8, in a specific implementation, the premixed air-fuel ratio valve according to the first embodiment of the present utility model further includes: the second installation seat 12 is installed at the bottom side of the isolation seat 4, the second installation seat 12 is a shell with at least one third vent 1201 on the side part, the top of the second installation seat 12 is communicated with the second opening 401 through an opening, and the air inlet 105 is communicated with the second opening 401 and the first chamber 101 through at least one third vent 1201; and a second floating spring 13 extending in the longitudinal direction and having both ends connected to the valve cartridge 5 and the bottom inner wall of the second mount 12, respectively.

Specifically, in order to realize floating connection of the second diaphragm 6 in the second chamber 102, in the technical scheme adopted by the utility model, the bottom of the isolation seat 4 is sleeved with the second installation seat 12 in the second chamber 102, the second installation seat 12 is a shell with an opening at the top, the opening is arranged at the bottom of the isolation seat 4 and is covered by the isolation seat 4, the second opening 401 on the isolation seat 4 is communicated with the interior of the second installation seat 12, the side part of the second installation seat 12 is provided with a third air vent 1201, and fuel gas in the second chamber 102 can enter the interior of the second installation seat 12 through the third air vent 1201 and enter the third chamber 103 through the second opening 401 of the isolation seat 4 or enter the first chamber 101 through the first air vent 501 of the valve core 5. The bottom inner wall of the second mounting seat 12 is connected with a second floating spring 13, the other end of the second floating spring 13 is sleeved at the bottom of the valve core 5, the valve core 5 is arranged in the shell of the second mounting seat 12 and partially penetrates through a second opening 401 of the isolation seat 4, the valve core 5 is provided with a circumferential side part which is matched with the shape and the size of the second opening 401 of the isolation seat 4, and the circumferential side part of the valve core 5 can seal the second opening 401 under the thrust of the second floating spring 13. When the gas inside the second mounting seat 12 enters the first cavity 102a on the top side of the second diaphragm 6 through the first vent hole 501 of the valve core 5, part of the gas which does not enter the first cavity 101 through the second vent hole 801 of the first mounting seat 8 in time will cause the gas pressure in the first cavity 102a to be greater than the gas pressure in the second cavity 102b on the bottom side of the second diaphragm 6, so as to generate a gas pressure difference, under the action of the gas pressure difference, the second diaphragm 6 drives the valve core 5 to move downwards, so that the circumferential side part of the valve core 5 cannot close the second opening 401, and the gas inside the second mounting seat 12 can directly enter the third cavity 103 through the second opening 401, thereby reducing the flow of the gas entering the first cavity 101 through the first vent hole 501 of the valve core 5, and realizing the gas flow adjusting effect of the second flow adjusting component.

Further, referring to fig. 1, fig. 2 and fig. 7, in a premixed air-fuel ratio valve according to an embodiment of the present utility model, in a specific implementation, at least one pipe interface 702 communicating with the first cavity 102a is formed on the end cover 7, for communicating with the first inlet end 201 of the venturi tube 2.

Specifically, in order to realize another control mode for the first flow rate adjusting component, in the technical scheme adopted by the utility model, the end cover 7 is provided with the pipeline interface 702 communicated with the first cavity 102a, the pipeline interface 702 can be communicated with the first inlet end 201 of the venturi tube 2 through a pipeline, when the venturi tube 2 is filled with air, the air pressure in the first chamber 101 communicated with the throat 203 of the venturi tube 2 changes under the action of fluid, so that the air pressure difference capable of driving the first diaphragm 3 to float up and down is generated, and the opening degree between the first diaphragm 3 and the second vent 801 of the first mounting seat 8 is changed, so that the control of the gas flow rate through the first flow rate adjusting component is realized.

Further, referring to fig. 1, fig. 3 to fig. 6 and fig. 9, in a specific implementation, the premixed air-fuel ratio valve according to the first embodiment of the present utility model further includes: the air inlet cutting assembly, the inside of the shell 1 is also provided with a fourth chamber 104, the top side of the shell 1 is provided with a second mounting groove 104a penetrating through the shell 1 at a position corresponding to the fourth chamber 104, the fourth chamber 104 is communicated with the outside of the shell 1 through the second mounting groove 104a, the bottom of the fourth chamber 104 is communicated with the second chamber 102 through a third opening 104b, the side part of the fourth chamber 104 is communicated with an air inlet 105, and the air inlet cutting assembly penetrates through the second mounting groove 104a and is partially positioned in the fourth chamber 104, and the air inlet cutting assembly comprises: an electromagnetic coil 14 disposed above the second mounting groove 104a and closing the second mounting groove 104a, the electromagnetic coil 14 extending along a longitudinal coil and electrically connected to a power source; a fixed iron core 15 which is built in the winding center of the electromagnetic coil 14 and is fixed with the end of the electromagnetic coil 14 away from the second mounting groove 104 a; a moving iron core which is built in the coiling center of the electromagnetic coil 14 and is positioned below the fixed iron core 15 and is spaced from the fixed iron core 15 by a preset distance; and a closing member connected to the moving iron core and located below the moving iron core; the movable iron core can drive the closing member to reciprocate longitudinally relative to the electromagnetic coil 14 through electromagnetic induction so as to open and close the third opening 104b.

Specifically, in order to realize that the on-off of the fuel gas at the air inlet 105 can be controlled, in the technical scheme adopted by the utility model, a fourth chamber 104 is further arranged in the shell 1, a second mounting groove 104a penetrating through the shell 1 is formed in the top of the fourth chamber 104, the side part of the fourth chamber 104 is communicated with the air inlet 105, a third opening 104b is formed in the bottom of the fourth chamber 104, the fourth chamber 104 can be communicated with the second chamber 102 through the third opening 104b, an air inlet cutting assembly is mounted on the second mounting groove 104a, the assembly part is positioned in the fourth chamber 104, the air inlet cutting assembly comprises an electromagnetic coil 14 which is positioned above the second mounting groove 104a and is electrically connected with a power supply, the electromagnetic coil 14 longitudinally winds and extends to the bottom of the second mounting groove 104a, a fixed iron core 15 is fixed at the top of the winding center of the electromagnetic coil, a movable iron core part is arranged at a preset distance below the fixed iron core 15, and the movable iron core part is positioned in the fourth chamber 104, and the bottom of the movable iron core part is connected with a closing piece. When the electromagnetic coil 14 is not energized, the closure member closes the third opening 104b so that the fourth chamber 104 and the second chamber 102 are not in communication with each other; when the electromagnetic coil 14 is electrified to generate electromagnetic excitation so that the fixed iron core 15 obtains magnetism, the movable iron core moves upwards longitudinally under the action of the magnetic force until the top of the movable iron core is attached to the bottom of the fixed iron core 15, and the closing piece moves upwards under the driving of the upward movement of the movable iron core so that the fourth chamber 104 is communicated with the second chamber 102 through the third opening 104 b.

Further, referring to fig. 1, fig. 3 to fig. 6 and fig. 9, in a specific implementation, the premixed air-fuel ratio valve according to the first embodiment of the present utility model is divided into: the first movable iron core 16 and the second movable iron core 18, wherein the top of the second movable iron core 18 is connected with the bottom of the first movable iron core 16 through a first compression spring 20; the closure is divided into: the first closing member 17 and the second closing member 19, the first closing member 17 is connected with the first moving iron core 16 and is located below the second moving iron core 18, the top of the first closing member is propped against the bottom of the electromagnetic coil 14 through the second compression spring 21, and the second closing member 19 is connected with the bottom of the second moving iron core 18.

Specifically, in order to realize secondary cutting of the fuel gas in the air inlet 105 through the air inlet cutting assembly, the technical scheme adopted by the utility model includes that the movable iron core is sequentially divided into: the first moving iron core 16 and the second moving iron core 18, the top of the second moving iron core 18 is connected with the bottom of the first moving iron core 16 through a first compression spring 20. The closure is divided into: the first closing piece 17 and the second closing piece 19, the first closing piece 17 is sleeved on the side part of the first movable iron core 16, the bottom of the first closing piece extends to the fourth chamber 104, the part of the first closing piece located in the fourth chamber 104 abuts against the bottom of the electromagnetic coil 14 through the second compression spring 21, and the second closing piece 19 is sleeved on the bottom side of the first closing piece 17 and connected with the bottom of the second movable iron core 18. When the electromagnetic coil 14 is not electrified, under the thrust of the second compression spring 21, the first closing member 17 drives the second closing member 19 to close the third opening 104b, so that the fourth chamber 104 and the second chamber 102 are not communicated with each other; when the electromagnetic coil 14 is electrified, the fixed iron core 15 obtains magnetic excitation, the first movable iron core 16 moves upwards longitudinally under the action of magnetic force until the top of the first movable iron core is attached to the bottom of the fixed iron core 15, the first closing member 17 moves upwards synchronously under the drive of the first movable iron core 16, and when the first movable iron core 16 moves upwards, the second movable iron core 18 moves upwards longitudinally under the combined action of the first compression spring 20, the fixed iron core 15 and the first movable iron core 16 until the top of the second movable iron core is attached to the bottom of the first movable iron core 16, and the second closing member 19 moves upwards synchronously under the drive of the second movable iron core 18, so that the fourth chamber 104 and the second chamber 102 are communicated with each other through the third opening 104 b; when the electromagnetic coil 14 is powered off, the first closing member 17 drives the second closing member 19 to move downward simultaneously under the urging force of the second compression spring 21 until the third opening 104b is completely closed. After the air inlet cutting assembly adopts the secondary cutting structure, the gas of the air inlet 105 can be effectively cut off, even if one of the closing members fails due to mechanical failure, the other closing member can still close the third opening 104b, and the damage of gas leakage can be effectively avoided.

Further, referring to fig. 1 and fig. 4 to fig. 6, in an embodiment of the present utility model, a premixed air-fuel ratio valve further includes: an air outlet 106 adjustment assembly mounted to the third chamber 103, comprising: the second adjusting screw 22, the top side of the third chamber 103 is provided with a fourth opening 103a penetrating through the housing 1 along the longitudinal direction, and the second adjusting screw 22 penetrates through the fourth opening 103a and is rotationally connected with the bottom of the third chamber 103; the adjusting piece 23 is provided with a second screw hole penetrating through the adjusting piece 23 and matched with the second adjusting screw 22 along the longitudinal direction, and the adjusting piece 23 is connected with the second adjusting screw 22 through the second screw hole and can reciprocate between a first position and a second position along the longitudinal direction relative to the air outlet 106; and a pre-tightening spring 24 sleeved on the second adjusting screw 22, and two ends of the pre-tightening spring respectively abut against the top inner wall of the third chamber 103 and the top side of the adjusting piece 23; wherein the regulating member 23 completely closes the air outlet 106 when the regulating member 23 is located at the first position, and the regulating member 23 completely exposes the air outlet 106 when the regulating member 23 is located at the second position.

Specifically, in order to realize the control of the flow rate of the gas output by the gas outlet 106, in the technical scheme adopted by the utility model, a fourth opening 103a penetrating through the shell 1 is formed on the top side of the third chamber 103, a limiting structure is arranged at the bottom of the third chamber 103, the second adjusting screw 22 is rotationally connected with the limiting structure at the bottom of the third chamber 103 through the fourth opening 103a, an adjusting piece 23 is sleeved on the thread of the second adjusting screw 22, a part of the adjusting piece 23 is attached to the inner wall where the gas outlet 106 is located, the shape and the size of the adjusting piece are matched with those of the gas outlet 106, a pre-tightening spring 24 is sleeved on the thread of the second adjusting screw 22, and two ends of the pre-tightening spring 24 respectively abut against the bottom of a nut of the second adjusting screw 22 and the top of the joint of the adjusting piece 23 and the second adjusting screw 22. When the second adjusting screw 22 is rotated, the adjusting member 23 can be moved up and down in the longitudinal direction with respect to the air outlet 106 by the rotation of the thread on the second adjusting screw 22, and when the adjusting member 23 is moved to the highest position, it completely closes the air outlet 106.

Further, referring to fig. 1 and fig. 4 to fig. 6, in a premixed air-fuel ratio valve according to an embodiment of the present utility model, in a specific implementation, a position of the third chamber 103 corresponding to the adjusting member 23 is provided with a limit rib 103b adapted to an external dimension of the adjusting member 23.

Specifically, in order to prevent the air outlet 106 from being blocked and disabled due to the false touch or rotation of the adjusting member 23, in the technical scheme adopted by the utility model, the third cavity 103 inside the housing 1 is provided with the limit rib 103b corresponding to the side part of the adjusting member 23 on the inner wall of the adjusting member 23, and when the adjusting member 23 is driven by the second adjusting screw 22 to move up and down along the longitudinal direction, the limit rib 103b can limit the rotation of the adjusting member 23, so that the air outlet 106 is blocked by the adjusting member 23.

Example two

An embodiment of the present utility model provides a stove, including: the premixed air-fuel ratio valve according to the first embodiment of the present utility model.

Specifically, after the premixed air-fuel ratio valve provided by the first embodiment of the utility model is applied to the kitchen range, the maximum combustion power of the kitchen range is not more than 5.23kW, and the kitchen range is suitable for household use.

It should be noted that, in the description of the present specification, the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element in question must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present utility model; the terms "coupled," "mounted," "secured," and the like are to be construed broadly, and may be fixedly coupled, detachably coupled, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present specification, the terms "one embodiment," "some embodiments," "particular embodiments," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims (10)

1. A premix air-fuel ratio valve for a household kitchen range of no more than 5.23kW power, comprising:

the shell is internally provided with a first chamber, a second chamber and a third chamber, the side parts of the shell are respectively provided with an air inlet communicated with the second chamber and an air outlet communicated with the third chamber, the first chamber is positioned at the top side of the second chamber and is communicated with the second chamber through a first opening, and the first chamber and the second chamber are respectively communicated with the third chamber through the side parts;

The first inlet end or the outlet end of the venturi tube is communicated with the fan, and the second inlet end of the venturi tube is communicated with the air outlet;

a first flow regulating assembly, built into the first chamber, comprising: the first diaphragm is connected to the first chamber in a floating mode, the shape and the size of the first diaphragm are matched with those of a cross section of the first chamber perpendicular to the longitudinal direction, and the first diaphragm can float up and down relative to the first chamber along the longitudinal direction through the air pressure change of the first chamber so as to change the opening between the first opening and the first diaphragm; and

a second flow regulating assembly, built into the second chamber, comprising: the valve core is connected to the isolation seat in a floating mode and penetrates through the second opening, a first vent hole penetrating through the valve core is formed in the upper portion of the valve core in a longitudinal mode, the second diaphragm is sleeved on the valve core and located above the communicating position of the second cavity and the third cavity, the shape and the size of the second diaphragm are matched with the shape and the size of a cross section of the second cavity perpendicular to the longitudinal direction so as to divide the second cavity into a first cavity and a second cavity in the longitudinal direction, the first cavity is communicated with the second cavity through the first vent hole, the valve core can be driven by pressure difference change of the first cavity and the second cavity to float up and down relative to the second opening in the longitudinal direction so as to change the opening degree between the second opening and the valve core.

2. The premixed air-fuel ratio valve according to claim 1, wherein,

a first mounting groove is formed in the top side of the shell, corresponding to the position of the second chamber, the first opening is formed in the bottom of the first mounting groove, and the side part of the first mounting groove is communicated with the third chamber;

the first flow regulating assembly further comprises:

an end cap mounted to a top side of the housing and closing the first mounting groove to form the first chamber;

the first mounting seat is mounted on the first opening, and a second ventilation hole penetrating through the first mounting seat and communicated with the first opening is longitudinally formed in the first mounting seat; and

and the first floating spring extends longitudinally, and two ends of the first floating spring are respectively connected with the first mounting seat and the bottom of the first diaphragm.

3. The premixed air-fuel ratio valve according to claim 2, wherein,

the first flow regulating assembly further comprises:

the top of the end cover is longitudinally provided with a first screw hole penetrating through the end cover, and the first adjusting screw is in threaded connection with the first screw hole; and

and the adjusting spring extends longitudinally and is respectively connected with the bottom of the first adjusting screw and the top of the first diaphragm at two ends of the adjusting spring.

4. The premixed air-fuel ratio valve according to claim 2, wherein,

the second flow regulating assembly further comprises:

the second installation seat is arranged at the bottom side of the isolation seat, the second installation seat is a shell with at least one third vent hole formed in the side part, the top of the second installation seat is communicated with the second opening through an opening, and the air inlet is communicated with the second opening and the first cavity through the at least one third vent hole; and

and the second floating spring extends longitudinally, and two ends of the second floating spring are respectively connected with the valve core and the inner wall of the bottom of the second mounting seat.

5. The premixed air-fuel ratio valve according to claim 2, wherein,

at least one pipeline interface communicated with the first cavity is arranged on the end cover and is used for being communicated with the first inlet end of the venturi tube.

6. The premix air-fuel ratio valve of any of claims 1-5, further comprising:

the air inlet cutting assembly, the inside of shell still has the fourth cavity, the top side of shell corresponds the position of fourth cavity has seted up and has run through the second mounting groove of shell, the fourth cavity pass through the second mounting groove with the outside intercommunication of shell, the bottom of fourth cavity pass through the third opening with the second cavity intercommunication, the lateral part of fourth cavity with the air inlet intercommunication, the air inlet cutting assembly runs through the second mounting groove and part is located the fourth cavity, it includes:

The electromagnetic coil is arranged above the second mounting groove and seals the second mounting groove, and the electromagnetic coil longitudinally winds and extends and is electrically connected with a power supply;

a fixed iron core which is arranged in the coiling center of the electromagnetic coil and is fixed with the end part of the electromagnetic coil far away from the second mounting groove;

a movable iron core which is arranged in the coiling center of the electromagnetic coil, is positioned below the fixed iron core and is spaced from the fixed iron core by a preset distance; and

the closing piece is connected with the movable iron core and is positioned below the movable iron core;

the movable iron core can drive the closing piece to longitudinally reciprocate relative to the electromagnetic coil through electromagnetic induction so as to open and close the third opening.

7. The premixed air-fuel ratio valve according to claim 6, wherein,

the movable iron core is sequentially divided into: the top of the second movable iron core is connected with the bottom of the first movable iron core through a first compression spring;

the closure is divided into: the first closing piece is connected with the first movable iron core and is positioned below the second movable iron core, the top of the first closing piece is propped against the bottom of the electromagnetic coil through a second compression spring, and the second closing piece is connected with the bottom of the second movable iron core.

8. The premix air-fuel ratio valve of any of claims 1-5, further comprising:

and an air outlet adjusting assembly mounted in the third chamber, comprising:

the top side of the third chamber is provided with a fourth opening penetrating through the shell longitudinally, and the second adjusting screw penetrates through the fourth opening and is rotationally connected with the bottom of the third chamber;

the adjusting piece is longitudinally provided with a second screw hole penetrating through the adjusting piece and matched with the second adjusting screw, is connected with the second adjusting screw through the second screw hole and can longitudinally reciprocate between a first position and a second position relative to the air outlet; and

the pre-tightening spring is sleeved on the second adjusting screw, and two ends of the pre-tightening spring are respectively abutted against the inner wall of the top side of the third chamber and the top side of the adjusting piece;

wherein when the regulating member is located at the first position, the regulating member completely closes the air outlet, and when the regulating member is located at the second position, the regulating member completely exposes the air outlet.

9. The premixed air-fuel ratio valve according to claim 8, wherein,

And the position of the third cavity corresponding to the adjusting piece is provided with a limit rib which is matched with the external dimension of the adjusting piece.

10. A cooktop, comprising:

a premix air-fuel ratio valve as in any one of claims 1-9.