Gas premixing assembly and gas stove

Abstract

The invention relates to the technical field of gas equipment, in particular to a gas premixing assembly and a gas stove. The fuel gas premixing assembly comprises an adjusting valve, a Venturi tube and a wrapping piece. The adjusting valve is provided with a gas outlet end which is used for outputting fuel gas. The venturi tube is provided with a connecting end, and the connecting end is directly connected and communicated with the air outlet end. The wrapping piece wraps the joint of the air outlet end and the connecting end. The gas outlet end and the connecting end are directly connected and communicated, and the wrapping piece wraps the joint of the gas outlet end and the connecting end to fixedly connect the gas outlet end and the connecting end, so that the connecting distance between the regulating valve and the Venturi tube is shortened, the flowing path of gas between the regulating valve and the Venturi tube is shortened, the pressure loss of the gas is reduced, and the service life of the gas is prolonged. According to the gas premixing assembly, the pressure of mixed gas output by the Venturi tube is kept high, and meanwhile the structure of the gas premixing assembly is more compact.

Description

Technical Field

[0001] The present invention relates to the technical field of gas equipment, and in particular to a gas premixing component and a gas stove. Background Art

[0002] Common gas equipment in households, such as gas stoves and gas water heaters, often requires mixing a certain amount of air before the gas reaches the combustion position to improve the combustion efficiency of the gas, reduce the generation of harmful gases, reduce carbon deposition, and improve the heat transfer efficiency. In related technologies, devices such as a blower and an ejector tube are added to enable the gas and air to be fully mixed before reaching the combustion position. However, the added devices increase the volume of the gas equipment and the required installation space; moreover, the pressure loss along the flow path of the gas increases, the pressure of the gas when it reaches the combustion position decreases, the gas and air do not contact sufficiently, the combustion is not sufficient, and the generated flame is weak and unstable. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the related technologies. For this purpose, the present invention provides a gas premixing component, including:

[0004] A regulating valve, the regulating valve is provided with an air outlet end, and the air outlet end is used for outputting gas;

[0005] A Venturi tube, the Venturi tube is provided with a connection end, and the connection end is directly connected and communicated with the air outlet end;

[0006] A wrapping member, the wrapping member wraps around the connection part of the air outlet end and the connection end.

[0007] According to the gas premixing component provided by the embodiment of the present invention, the regulating valve is provided with a first limiting surface at the air outlet end, the Venturi tube is provided with a second limiting surface at the connection end, one end of the wrapping member abuts against the first limiting surface, and the other end abuts against the second limiting surface.

[0008] According to the gas premixing component provided by the embodiment of the present invention, a first sealing member is clamped between the wrapping member and the outer peripheral wall of the air outlet end.

[0009] According to the gas premixing component provided by the embodiment of the present invention, there are a plurality of the first sealing members, and the plurality of sealing members are spaced apart along the height direction of the air outlet end.

[0010] According to the gas premixing component provided by the embodiment of the present invention, the distance between any two adjacent first sealing members is 1 mm - 3 mm.

[0011] According to the gas premixing component provided by the embodiment of the present invention, the plurality of first sealing members are evenly distributed along the height direction of the air outlet end.

[0012] According to the gas premixing component provided by an embodiment of the present invention, a plurality of second seals are clamped between the wrapping member and the outer peripheral wall of the connection end, and the plurality of second seals are spaced apart along the height direction of the connection end.

[0013] According to the gas premixing component provided by an embodiment of the present invention, the distance between any two adjacent second seals is 1 mm - 3 mm.

[0014] According to the gas premixing component provided by an embodiment of the present invention, it further includes a pressure regulating pipe. An air pressure regulating cavity is provided in the regulating valve, and the air pressure regulating cavity is used to regulate the flow rate of the regulating valve. One end of the pressure regulating pipe is connected and communicated with the venturi tube, and the other end of the pressure regulating pipe is connected and communicated with the regulating valve and communicated with the air pressure regulating cavity.

[0015] According to the gas premixing component provided by an embodiment of the present invention, the pressure regulating pipe is a straight pipe.

[0016] According to the gas premixing component provided by an embodiment of the present invention, it further includes a blower. The venturi tube is further provided with an air guiding end and an output end, and the air guiding end, the output end and the connection end are communicated with each other. The blower is connected and communicated with the air guiding end, or the blower is connected and communicated with the output end.

[0017] According to the gas premixing component provided by an embodiment of the present invention, it further includes an adapter flange. The adapter flange is connected and communicated with the output end, and the adapter flange is adapted to be connected to a burner to supply gas to the burner.

[0018] The present invention also provides a gas stove, including:

[0019] A gas premixing component, and the gas premixing component is the gas premixing component as described above;

[0020] A burner, and the burner is connected and communicated with the adapter flange of the gas premixing component.

[0021] According to the gas premixing component provided by the present invention, by directly connecting and communicating the gas outlet end with the connection end, and wrapping the wrapping member around the connection part of the gas outlet end and the connection end to fixedly connect the gas outlet end and the connection end, the connection distance between the regulating valve and the venturi tube is shortened, the flow path of the gas between the regulating valve and the venturi tube is shortened, thereby reducing the pressure loss of the gas, enabling the mixed gas output by the venturi tube to maintain a relatively high pressure, and at the same time, making the structure of the gas premixing component more compact.

[0022] Additional aspects and advantages of the present invention will be given in part in the following description, will become apparent in part from the following description, or will be understood through the practice of the present invention. Description of the Drawings

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the related art, the following will briefly introduce the drawings required for use in the description of the embodiments or the related art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0024] Figure 1 It is the front view of the gas premixing assembly provided by the embodiment of the present invention;

[0025] Figure 2 It is the sectional view of the gas premixing assembly provided by the embodiment of the present invention;

[0026] Figure 3 It is the partial structural schematic diagram of the regulating valve provided by the embodiment of the present invention;

[0027] Figure 4 It is the top view of the gas premixing assembly provided by the embodiment of the present invention.

[0028] Reference numerals:

[0029] 01, gas premixing assembly;

[0030] 100, regulating valve; 101, first chamber; 102, second chamber; 103, third chamber; 104, air pressure regulating chamber; 105, upper chamber; 106, middle chamber; 107, lower chamber;

[0031] 110, valve body; 111, intake end; 112, outlet end; 113, first limiting surface; 116, protective cover; 117, fixing block;

[0032] 120, first diaphragm; 121, first tray;

[0033] 130, compensation spring; 131, mounting seat; 132, first communication hole;

[0034] 140, regulating spring; 141, regulating column;

[0035] 150, main regulating assembly; 151, compartment seat; 152, valve core; 153, second diaphragm; 154, main spring; 155, fixing seat; 156, third communication hole;

[0036] 160, output regulating assembly; 170, cut-off assembly;

[0037] 200, Venturi tube; 210, connection end; 220, second limiting surface; 230, air guiding end; 240, output end; 250, adapter flange; 260, fixing protrusion;

[0038] 300. Package; 330. Air pressure regulating tube;

[0039] 400. Fan. Specific embodiments

[0040] The following further describes in detail the embodiments of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0041] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the embodiments of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0042] In the description of the embodiments of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific situations.

[0043] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over", and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "below", "beneath", and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0044] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0045] The following combines Figures 1 - 4 to describe the gas premixing assembly of the present invention. It can be understood that for common gas appliances in households such as gas stoves and gas water heaters, the gas often needs to be mixed with a certain amount of air before reaching the combustion position to improve the combustion efficiency of the gas, reduce the generation of harmful gases, reduce carbon deposition, and improve the heat transfer efficiency.

[0046] Refer to Figure 1 and Figure 2 As shown, the gas premixing assembly 01 provided according to the present invention includes a regulating valve 100, a Venturi tube 200, and a wrapper 300.

[0047] Specifically, the regulating valve 100 is used to regulate the flow rate of the gas. The Venturi tube 200 is connected and communicated with the regulating valve 100. The Venturi tube 200 is used to mix the gas with air, so as to provide the mixed gas to the gas appliance to improve the combustion efficiency of the gas. The regulating valve 100 is provided with an air outlet end 112, and the air outlet end 112 is used to output the gas. As Figure 2 shown, the air outlet end 112 is a convex structure provided on the side of the regulating valve 100 facing the Venturi tube 200, and a through hole is provided in the convex structure to communicate with the inside of the regulating valve 100.

[0048] The Venturi tube 200 is provided with a connection end 210. As Figure 2 shown, the connection end 210 is a convex structure provided on the side of the Venturi tube 200 facing the regulating valve 100, and a through hole is provided in the convex structure to communicate with the inside of the Venturi tube 200. The connection end 210 is directly connected and communicated with the air outlet end 112. As Figure 2 shown, the end of the air outlet end 112 and the end of the connection end 210 can be abutted; or the end of the air outlet end 112 and the end of the connection end 210 are opposite and spaced apart by a certain distance.

[0049] For example, the distance between the end of the gas outlet end 112 and the end of the connection end 210 can be 2 mm - 5 mm. The wrapping member 300 is wrapped around the connection between the gas outlet end 112 and the connection end 210 to fixedly connect the gas outlet end 112 and the connection end 210. This can shorten the connection distance between the regulating valve 100 and the Venturi tube 200, shorten the flow path of the gas between the regulating valve 100 and the Venturi tube 200, thereby reducing the pressure loss of the gas, making the gas pressure input into the Venturi tube 200 higher, and thus the mixed gas output by the Venturi tube 200 maintains a higher pressure. At the same time, the structure of the gas premixing assembly 01 is made more compact. In some embodiments, the wrapping member 300 is threadedly connected to both the gas outlet end 112 and the connection end 210. Threads are provided on the outer peripheral surfaces of the gas outlet end 112 and the connection end 210. The wrapping member 300 is in a straight tube shape, and threads are provided on the inner walls at both ends of the wrapping member 300. The gas outlet end 112 and the connection end 210 are abutted against both ends of the wrapping member 300, and the wrapping member 300 is rotated to gradually bring the gas outlet end 112 and the connection end 210 closer and abut against each other.

[0050] As Figure 2 shown, the regulating valve 100 further has an air inlet end 111, and the air inlet end 111 is used to connect to a gas supply device, and the gas supply device can be a municipal gas supply pipeline. Gas enters the regulating valve 100 from the air inlet end 111, undergoes flow regulation through the regulating valve 100, and a certain flow rate of gas is output from the gas outlet end 112 and directly input into the Venturi tube 200 through the connection end 210, thereby shortening the flow path of the gas between the regulating valve 100 and the Venturi tube 200, making the structure of the gas premixing assembly 01 more compact, and reducing the pressure loss generated during the gas flow process. At the same time, by providing the wrapping member 300 to connect the regulating valve 100 and the Venturi tube 200, the connection structures on the regulating valve 100 and the Venturi tube 200 are reduced, and the wrapping member 300 has good replaceability, which is convenient for later maintenance.

[0051] According to the gas premixing assembly 01 of the embodiment of the present invention, by directly connecting and communicating the gas outlet end 112 and the connection end 210, and the wrapping member 300 is wrapped around the connection between the gas outlet end 112 and the connection end 210 to fixedly connect the gas outlet end 112 and the connection end 210, thereby shortening the connection distance between the regulating valve 100 and the Venturi tube 200, shortening the flow path of the gas between the regulating valve 100 and the Venturi tube 200, thereby reducing the pressure loss of the gas, making the mixed gas output by the Venturi tube 200 maintain a higher pressure, and at the same time, making the structure of the gas premixing assembly 01 more compact.

[0052] See Figure 1 And Figure 4As shown, in some embodiments, a fixing block 117 is provided on one side of the regulating valve 100 facing the Venturi tube 200. The fixing block 117 is located at the air outlet end 112. A fixing protrusion 260 is provided on the outer peripheral wall of the Venturi tube 200. The fixing protrusion extends in a direction perpendicular to the axis of the Venturi tube 200. The fixing protrusion 260 and the fixing block 117 are stacked and connected by screws, thereby strengthening the connection strength between the regulating valve 100 and the Venturi tube 200.

[0053] See Figure 2 As shown, according to some embodiments of the present invention, the gas premixing assembly 01 further includes a fan 400. The Venturi tube 200 is further provided with an air guiding end 230 and an output end 240. The air guiding end 230, the output end 240 and the connection end 210 are in communication with each other. Among them, the air guiding end 230 is used to input air into the Venturi tube 200 to mix with the gas input from the connection end 210, and the mixed gas is output from the output end 240. In Figure 2 In the example, the air guiding end 230 can be provided at one end of the Venturi tube 200, the output end 240 is provided at the other end of the Venturi tube 200, and the connection end 210 can be provided on the peripheral wall of the Venturi tube 200. The fan 400 is connected and communicated with the air guiding end 230. The fan 400 conveys air into the Venturi tube 200 by blowing; of course, the fan 400 can also be connected and communicated with the output end 240, and the fan 400 sucks air into the Venturi tube 200 from the air guiding end 230 by pumping. In some embodiments, the air outlet end of the fan 400 is connected to the Venturi tube 200 through an air duct member, wherein the air duct member is inserted into the air guiding end 230, or the air duct member can be inserted into the output end 240. The fan 400 and the air duct member can be integrally formed to improve the stability of the connection between the fan 400 and the Venturi tube.

[0054] See Figure 2 As shown, according to some embodiments of the present invention, the regulating valve 100 is provided with a first limiting surface 113 at the air outlet end 112, and the Venturi tube 200 is provided with a second limiting surface 220 at the connection end 210. One end of the wrapping member 300 abuts against the first limiting surface 113, and the other end abuts against the second limiting surface 220 to limit the wrapping member 300. As Figure 3As shown, the air outlet end 112 is a convex structure on the outer surface of the regulating valve 100. At the root of the convex structure, the regulating valve 100 constructs a first limiting surface 113. One end of the wrapping member 300 abuts against the first limiting surface 113 for limiting. The structure of the first limiting surface 113 is not limited to this. In some embodiments, a stepped portion is provided at the root of the convex structure, and the end surface of the stepped portion is the first limiting surface 113, which can reduce the interference between the wrapping member 300 and other structures on the outer surface of the regulating valve 100 and make the connection between the wrapping member 300 and the regulating valve 100 more stable. In some implementations, a wear-resistant coating is provided on the first limiting surface 113 to reduce the wear of the wrapping member 300 on the surface of the regulating valve 100.

[0055] As Figure 2 shown, the connecting end 210 is a convex structure on the peripheral wall of the Venturi tube 200. On the outer surface of the Venturi tube 200 at the root of the convex structure, a second limiting surface 220 is constructed. The other end of the wrapping member 300 is connected to the second limiting surface 220 for limiting. In some embodiments, a limiting step can be provided on the outer surface of the Venturi tube 200 at the root of the convex structure, and the end surface of the limiting step is the second limiting surface 220, so that the end surface of the wrapping member 300 fits more closely to the outer surface of the Venturi tube 200 and improves the stability of the connection.

[0056] According to some embodiments of the present invention, a first sealing member is clamped between the wrapping member 300 and the outer peripheral wall of the air outlet end 112 to improve the airtightness at the connection between the wrapping member 300 and the regulating valve 100. The first sealing member can be a rubber sealing ring. In some embodiments, a groove is provided on the outer peripheral surface of the air outlet end 112, and the first sealing member is embedded in the groove and part of the first sealing member protrudes from the groove. There are multiple first sealing members, and the multiple sealing members are spaced apart along the height direction of the air outlet end 112 (such as Figure 2 the left-right direction shown in the figure) to perform multi-stage sealing between the air outlet end 112 and the wrapping member 300 to further improve the airtightness.

[0057] According to some embodiments of the present invention, the distance between any two adjacent first sealing members is 1 mm - 3 mm to increase the arrangement density of the first sealing members and improve the airtightness at the connection between the wrapping member 300 and the air outlet end 112. For example, the distance between any two adjacent first sealing members can be 1 mm, or 2 mm, or 3 mm. In some embodiments, the multiple first sealing members are evenly distributed along the height direction of the air outlet end 112.

[0058] According to some embodiments of the present invention, a plurality of second sealing members are clamped between the wrapping member 300 and the outer peripheral wall of the connecting end 210 to improve the airtightness of the connection between the wrapping member 300 and the Venturi tube 200. The second sealing members can be rubber sealing rings. The multiple second sealing members are arranged along the height direction of the connecting end 210 (such asFigure 2 Spaced apart in the left - right direction (as shown), the outer peripheral surface of the connection end 210 may be provided with a plurality of grooves, and each second seal is correspondingly embedded in a groove, and a part of the second seal protrudes from the groove. In some embodiments, the distance between any two adjacent second seals is 1 mm - 3 mm. For example, the distance between any two adjacent second seals may be 1 mm, or 1.5 mm, or 2.5 mm, or 3 mm.

[0059] See Figure 1 And Figure 4 As shown, according to some embodiments of the present invention, the gas premixing assembly 01 further includes a pressure regulating pipe 330. There is a pressure regulating cavity 104 in the regulating valve 100, and the pressure regulating cavity 104 is used to regulate the flow rate of the regulating valve 100. One end of the pressure regulating pipe 330 is connected and communicated with the venturi tube 200, and the other end of the pressure regulating pipe 330 is connected and communicated with the regulating valve 100 and with the pressure regulating cavity 104. The pressure in the pressure regulating cavity 104 is regulated through the venturi tube 200, so as to regulate the gas flow rate output by the regulating valve 100. In some embodiments, the pressure regulating pipe 330 is a straight pipe to reduce the connection length between the pressure regulating cavity 104 and the venturi tube 200, so as to increase the corresponding speed of the pressure regulation in the pressure regulating cavity 104, thereby improving the accuracy of the pressure regulation.

[0060] As Figure 2 As shown, according to some embodiments of the present invention, the regulating valve 100 includes a valve body 110, a first diaphragm 120, a compensation spring 130 and a mounting seat 131. The first diaphragm 120 is arranged in the valve body 110 and is connected to the valve body 110, and the first diaphragm 120 is deformable relative to the valve body 110. As Figure 3 As shown, the edge of the first diaphragm 120 is connected to the valve body 110, and the first diaphragm 120 can deform in the up - down direction (such as the direction shown in Figure 3 ). The compensation spring 130 is located on one side of the first diaphragm 120. One end of the compensation spring 130 is connected to the first diaphragm 120. The compensation spring 130 can provide a certain force to resist the deformation of the first diaphragm 120, make the deformation process of the first diaphragm 120 smooth, and at the same time avoid excessive deformation of the first diaphragm 120. The mounting seat 131 is arranged in the valve body 110. The mounting seat 131 and the valve body 110 can be integrally formed. For example, the mounting seat 131 can be integrally cast with the valve body 110. The compensation spring 130 is sleeved on the mounting seat 131 to fix the compensation spring 130. When the first diaphragm 120 deforms, the compensation spring 130 is stretched or compressed.

[0061] The mounting seat 131 is provided with a first communication hole 132, and the first communication hole 132 is used for fluid to flow through. The first diaphragm 120 deforms to adjust the opening degree of the first communication hole 132. As Figure 3As shown, one end of the first communication hole 132 faces the first diaphragm 120. When the first diaphragm 120 deforms upward (in the direction shown in Figure 3 ), the first diaphragm 120 moves away from the first communication hole 132, the opening degree of the first communication hole 132 increases, and the flow rate of the fluid increases; when the first diaphragm 120 deforms downward (in the direction shown in Figure 3 ), the first diaphragm 120 approaches the first communication hole 132, and the first diaphragm 120 blocks the first communication hole 132, the opening degree of the first communication hole 132 decreases, and the flow rate of the fluid decreases. By integrally molding the mounting seat 131 and the valve body 110, on the one hand, the airtightness inside the valve body 110 can be improved, preventing the fluid at one end of the first communication hole 132 from flowing to the other end through the connection gap, improving the control accuracy of the fluid flow rate, and on the other hand, reducing the assembly steps and improving the production efficiency.

[0062] As Figure 2 shown in Figure 3 , there are multiple chambers inside the valve body 110, including the first chamber 101, the second chamber 102, the third chamber 103, and the air pressure adjustment chamber 104. Among them, the air inlet end 111 is communicated with the first chamber 101, the first chamber 101 is communicated with both the second chamber 102 and the third chamber 103, the second chamber 102 is communicated with the third chamber 103, the air pressure adjustment chamber 104 is communicated with the second chamber 102, and the third chamber 103 is communicated with the air outlet end 112. The fluid can flow into the first chamber 101 from the air inlet end 111. Part of the fluid in the first chamber 101 flows into the second chamber 102, and then flows from the second chamber 102 to the third chamber 103 and out from the air outlet end 112. Another part of the fluid in the first chamber 101 can directly flow into the third chamber 103 and then out from the air outlet end 112.

[0063] As Figure 3 shown, the first diaphragm 120 is located at the connection between the second chamber 102 and the air pressure adjustment chamber 104, and the first diaphragm 120 separates the second chamber 102 and the air pressure adjustment chamber 104. The first communication hole 132 is used to communicate the first chamber 101 and the second chamber 102. By adjusting the air pressure difference between the air pressure adjustment chamber 104 and the second chamber 102, the first diaphragm 120 bulges upward or downward, thereby adjusting the opening degree of the first communication hole 132. By adjusting the opening degree of the first communication hole 132, the flow rate of the fluid flowing from the first chamber 101 into the second chamber 102 is controlled, thereby controlling the flow rate of the fluid at the air outlet end 112.

[0064] For example, when the air pressure in the air pressure adjustment chamber 104 is less than the air pressure in the second chamber 102, the first diaphragm 120 moves upward (in the direction shown in Figure 3When the air pressure in the air pressure adjustment chamber 104 is less than the air pressure in the second chamber 102, the first diaphragm 120 is agitated in the direction shown in FIG. (the direction shown in the figure), the first diaphragm 120 moves away from the first communication hole 132, the opening degree of the first communication hole 132 increases, the fluid flow rate from the first chamber 101 into the second chamber 102 increases, and the fluid flow rate at the air outlet 112 increases; when the air pressure in the air pressure adjustment chamber 104 is greater than the air pressure in the second chamber 102, the first diaphragm 120 approaches the first communication hole 132 and blocks the first communication hole 132, the opening degree of the first communication hole 132 decreases, the fluid flow rate from the first chamber 101 into the second chamber 102 decreases, and the fluid flow rate at the air outlet 112 decreases.

[0065] The control valve 100 further includes a first tray 121. The first tray 121 is connected to the first diaphragm 120 and is adapted to block the first communication hole 132. In some embodiments, the first diaphragm 120 is annular, the outer ring edge of the first diaphragm 120 is connected to the inner wall of the valve body 110, and the inner ring edge of the first diaphragm 120 is connected to the first tray 121. When the first diaphragm 120 deforms, the first tray 121 moves with the first diaphragm 120. When the first diaphragm 120 deforms downward, the first tray 121 approaches the first communication hole 132, preventing fluid from flowing out of the first communication hole 132. When one end of the first tray 121 contacts one end of the first communication hole 132 and completely blocks one end of the first communication hole 132, the flow rate of the first communication hole 132 is zero; when the first diaphragm 120 deforms upward, the first tray 121 moves in a direction away from the first communication hole 132, the resistance to fluid flowing out of one end of the first communication hole 132 decreases, and the fluid flow rate increases. The first tray 121 is connected to the compensation spring 130. For example, the first tray 121 may be provided with a groove, and one end of the compensation spring 130 is embedded in the groove. The force of the compensation spring 130 acts on the first tray 121, making the deformation process of the first diaphragm 120 smoother and assisting the first diaphragm 120 to restore its shape.

[0066] See Figure 3 As shown in FIG. , according to some embodiments of the present application, the control valve 100 further includes an adjustment spring 140 and an adjustment column 141. The adjustment spring 140 is located on the other side of the first diaphragm 120. The adjustment spring 140 is located in the air pressure adjustment chamber 104. One end of the adjustment spring 140 is connected to the first diaphragm 120. When the first diaphragm 120 deforms, it drives the adjustment spring 140 to extend or contract. The elastic force generated by the extension and contraction of the adjustment spring 140 can resist the deformation of the first diaphragm 120, and the elastic force generated by the adjustment spring 140 can assist the first diaphragm 120 to restore its shape. The adjustment spring 140 may be connected to the first tray 121. In the Figure 3 example of FIG. , a raised block is provided on the side of the first tray 121 facing the adjustment spring 140, and the adjustment spring 140 may be sleeved on the raised block.

[0067] The adjusting column 141 is movably connected to the valve body 110. In some embodiments, the adjusting column 141 is threadedly connected to the valve body 110, and the relative position between the adjusting column 141 and the valve body 110 is adjusted by rotating the adjusting column 141. One end of the adjusting column 141 is provided with a connecting head, and the connecting head is connected to the other end of the adjusting spring 140. The connecting head can be separately manufactured from the adjusting column 141, or the connecting head can also be integrally formed with the adjusting column 141. The adjusting column 141 is used to adjust the deformable range of the first diaphragm 120. By moving the adjusting column 141 closer to or farther away from the first diaphragm 120, the telescopic range of the adjusting spring 140 is defined, or the adjusting spring 140 has a certain elastic force in the initial state, thereby defining the deformable range of the first diaphragm 120.

[0068] As Figure 3 shown, the adjusting spring 140 is sleeved on the connecting head. The diameter of the connecting head can be slightly larger than the inner diameter of the adjusting spring 140, so that the connecting head and the adjusting spring 140 are in an interference fit. A limiting step can also be provided on the adjusting column 141. The limiting step is located at the root position of the connecting head, and the end of the adjusting spring 140 abuts against the limiting step for positioning.

[0069] See Figure 3 shown. According to some embodiments of the present application, the valve body 110 is provided with an installation channel. One end of the installation channel is communicated with the air pressure adjustment cavity 104, and the other end of the installation channel is communicated with the outside of the valve body 110. The adjusting column 141 is located in the installation channel, and the adjusting column 141 is movable along the installation channel. The position of the adjusting column 141 can be adjusted through the installation channel to adjust the deformable range of the first diaphragm 120.

[0070] In some embodiments, a protective cover 116 is provided at the other end of the installation channel. The protective cover 116 is sealingly connected to the installation channel to seal the installation channel and play a protective role. As Figure 3 shown, the protective cover 116 is in a T shape. One end of the protective cover 116 is inserted into the installation channel, and a sealing ring is clamped between the protective cover 116 and the installation channel to improve the sealing performance of the regulating valve 100.

[0071] See Figure 3 shown. According to some embodiments of the present application, the regulating valve 100 further includes a main regulating assembly 150. The main regulating assembly 150 is located at the communication position between the first chamber 101 and the third chamber 103. The main regulating assembly 150 is used to adjust the fluid flow rate between the first chamber 101 and the third chamber 103. The main regulating assembly 150 includes a partition seat 151, a valve core 152, a second diaphragm 153 and a main spring 154. The partition seat 151 and the second diaphragm 153 are both connected to the valve body 110. The second diaphragm 153 is deformable. The second diaphragm 153 is located on the side of the partition plate facing the first chamber 101 and above the partition seat 151 (as Figure 3In the direction shown, the second diaphragm 153 and the chamber seat 151 divide the first chamber 101 into an upper chamber 105, a middle chamber 106, and a lower chamber 107. Among them, the upper chamber 105 is located between the second diaphragm 153 and the partition, and the upper chamber 105 communicates with the first communication hole 132; the middle chamber 106 is directly located between the second diaphragm 153 and the chamber seat 151, and the middle chamber 106 directly communicates with the third chamber 103; the lower chamber 107 is located below the chamber seat 151 (as Figure 3 in the direction shown), and the lower chamber 107 communicates with the intake end 111.

[0072] The chamber seat 151 is provided with a second communication hole, the second communication hole communicates the middle chamber 106 and the lower chamber 107, the valve core 152 is inserted through the second communication hole, and the valve core 152 is provided with a blocking portion for adjusting the opening degree of the second communication hole. One end of the valve core 152 is connected to the second diaphragm 153, the other end of the valve core 152 is connected to the main spring 154, and the main spring 154 is fixedly connected to the valve body 110. The second diaphragm 153 can deform in the up and down direction (as Figure 3 in the direction shown) relative to the valve body 110. The deformation of the second diaphragm 153 can drive the valve core 152 to move relative to the communication hole to adjust the relative position of the blocking portion and the second communication hole, thereby adjusting the opening degree of the second communication hole. During the movement of the valve core 152, the main spring 154 is driven to elongate or shorten. The main spring 154 can support the valve core 152 and can provide a driving force to drive the valve core 152 to reset. In some embodiments, the main adjustment assembly 150 further includes a fixed seat 155. The fixed seat 155 is connected to the valve body 110, and the main spring 154 is connected to the fixed seat 155. The fixed seat 155 can wrap the main spring 154 and the second communication hole. Among them, the fixed seat 155 is provided with a plurality of air passing holes, and the fluid flows into the fixed seat 155 from the air passing holes and flows into the middle chamber 106 from the second communication hole.

[0073] As Figure 3 shown, the blocking portion is conical. When the valve core 152 moves upward, the cross-sectional area of the portion of the blocking portion located in the second communication hole increases, the opening degree of the second communication hole decreases, and the fluid flow rate in the second communication hole decreases; when the valve core 152 moves downward, the cross-sectional area of the portion of the blocking portion located in the second communication hole decreases, the opening degree of the second communication hole increases, and the fluid flow rate in the second communication hole increases.

[0074] The spool 152 is also provided with a third communication hole 156 which penetrates the spool 152 to communicate the upper chamber 105 and the lower chamber 107. Part of the fluid in the lower chamber 107 can flow into the upper chamber 105 through the third communication hole 156, flow into the second chamber 102 through the first communication hole 132, and finally flow to the third chamber 103 and the air outlet end 112. Another part of the fluid in the lower chamber 107 can flow into the middle chamber 106 through the second communication hole, directly flow into the third chamber 103 from the middle chamber 106, and finally flow out from the air outlet end 112.

[0075] Taking the gas premixing assembly 01 applied to a gas device as an example, the working process of the regulating valve 100 will be described below. The gas device can be a gas stove or a gas water heater:

[0076] The flow path of the gas in the regulating valve 100 includes a first flow path and a second flow path. The positions that the gas flows through in sequence on the first flow path are: the air inlet end 111, the lower chamber 107, the third communication hole 156, the upper chamber 105, the first communication hole 132, the second chamber 102, the third chamber 103, and the air outlet end 112. The contribution flow rate of the gas output by the first flow path to the air outlet end 112 is Q1. The positions that the gas flows through in sequence on the second flow path are: the air inlet end 111, the lower chamber 107, the second communication hole, the middle chamber 106, the third chamber 103, and the air outlet end 112. The contribution flow rate of the gas output by the second flow path to the air outlet end 112 is Q2. The total output flow rate of the air outlet end 112 is Q1 + Q2.

[0077] When the opening degrees of both the first communication hole 132 and the second communication hole are greater than zero, both Q1 and Q2 are greater than zero. When the air pressure in the air pressure regulating chamber 104 is greater than the air pressure in the second chamber 102, the first diaphragm 120 bulges downward (in the direction shown in Figure 3 ), and drives the first tray 121 to move towards the mounting seat 131. The resistance of the first tray 121 to the gas flowing out of the first communication hole 132 increases, and Q1 decreases. At the same time, since the flowing speed of the gas decreases, the air pressure in the upper chamber 105 increases to be greater than the air pressure in the middle chamber 106, causing the second diaphragm 153 to bulge downward. The second diaphragm 153 drives the spool 152 to move downward, and the cross-sectional area of the part of the blocking portion located in the second communication hole becomes smaller, and the opening degree of the second communication hole increases, so that Q2 increases. Among them, the air pressure regulating chamber 104 can be externally connected to a blower 400, and the air pressure in the air pressure regulating chamber 104 can be adjusted through the blower 400.

[0078] On the contrary, when the air pressure in the air pressure regulating chamber 104 is less than the air pressure in the second chamber 102, the first diaphragm 120 bulges upward (in the direction shown in Figure 3The valve core 152 is moved upward by the second diaphragm 153, and the cross-sectional area of ​​the sealing portion located in the second communicating hole increases, thereby reducing the opening of the second communicating hole and reducing Q2.

[0079] When the air pressure in the air pressure regulating chamber 104 is lower than the air pressure in the second chamber 102, and the air pressure difference between the air pressure regulating chamber 104 and the second chamber 102 reaches a certain value, the blocking portion of the valve core 152 can completely block the second connecting hole, at which time Q2 is equal to zero, and the total flow rate of the gas outlet 112 is equal to Q1. In some embodiments, the cross-sectional area of ​​the first connecting hole 132 is smaller than the cross-sectional area of ​​the second connecting hole, the maximum value of Q1 is smaller than the maximum value of Q2, and the minimum flow rate of the gas output by the regulating valve 100 is Q1, so that when the gas device is running at the minimum power, the gas flow rate can remain stable to avoid flameout.

[0080] When the fan 400 is started, the fluid flow rate in the venturi tube 200 increases, the gas flow rate in the third chamber 103 increases, and the gas flow rate in the second chamber 102 directly connected to the third chamber 103 increases, so that the air pressure in the second chamber 102 decreases, so that the first diaphragm 120 moves downward (such as Figure 3 The first diaphragm 120 drives the first tray 121 to move downward, the opening of the first connecting hole 132 decreases, Q1 decreases, and the air pressure in the upper chamber 105 increases. The air pressure difference between the upper chamber 105 and the middle chamber 106 changes, and the second diaphragm 153 drives the valve core 152 to move downward. The cross-sectional area of ​​the portion of the blocking portion located in the second connecting hole becomes smaller, thereby increasing the opening of the second connecting hole, Q2 increases, and the cross-sectional area of ​​the second connecting hole is greater than that of the first connecting hole 132. Therefore, the flow rate of the gas output by the regulating valve 100 can be increased by driving the fan 400. Figure 1 As shown, near the position where the venturi tube 200 is connected to the fan 400, one end of the air pressure regulating tube 330 is connected to and communicated with the venturi tube 200 to connect the venturi tube 200 and the air pressure regulating chamber 104, so that the air pressure in the air pressure regulating chamber 104 can be directly adjusted to adjust the flow rate of the regulating valve 100. The specific process is the same as the process described above and will not be repeated here.

[0081] See also Figure 2 and Figure 3As shown, according to some embodiments of the present application, the regulating valve 100 further includes an output regulating assembly 160 and a cut-off assembly 170. Among them, the output regulating assembly 160 is arranged at the air outlet end 112 to regulate the fluid flow rate at the air outlet end 112. The maximum output flow rate value of the regulating valve 100 can be limited through the output regulating assembly 160; the cut-off assembly 170 is arranged at the air inlet end 111. The cut-off assembly 170 is used to control the on-off between the air inlet end 111 and the first chamber 101. The cut-off assembly 170 can be an electromagnetic control valve core 152 assembly.

[0082] See Figure 1 As shown, according to some embodiments of the present invention, the gas premixing assembly 01 further includes an adapter flange 250. The adapter flange 250 is connected and communicated with the output end 240, and the adapter flange 250 is adapted to be connected and communicated with a burner to supply gas to the burner. Among them, the gas burns on the burner to provide heat. The venturi tube 200 is directly connected to the burner through the adapter flange 250, making the structure of the burner and the gas premixing assembly 01 more compact, and the connection between the gas premixing assembly 01 and the burner safer and more reliable. At the same time, the flow path of the gas from the venturi tube 200 to the burner can be reduced, thereby reducing the pressure loss of the gas, so that the mixed gas input to the burner maintains a relatively high pressure, so that the mixed gas in the burner has a relatively high flow rate, enabling the mixed gas to fully contact with air on the burner for combustion and improving the stability of the flame.

[0083] The gas stove according to an embodiment of the present invention includes a gas premixing assembly 01 and a burner. The gas premixing assembly 01 is the gas premixing assembly 01 as described above. The burner is connected and communicated with the adapter flange 250 of the gas premixing assembly 01. The gas is transported to the burner through the gas premixing assembly 01 and burns on the burner. By directly connecting the air outlet end 112 of the gas premixing assembly 01 to the connection end 210, the wrapping member 300 wraps around the connection between the air outlet end 112 and the connection end 210 to fixedly connect the air outlet end 112 and the connection end 210, thereby shortening the connection distance between the regulating valve 100 and the venturi tube 200, shortening the flow path of the gas between the regulating valve 100 and the venturi tube 200, thereby reducing the pressure loss of the gas, so that the mixed gas output by the venturi tube 200 maintains a relatively high pressure. At the same time, the structure of the gas premixing assembly 01 is made more compact; by directly connecting with the burner through the adapter flange 250, the flow path of the gas from the venturi tube 200 to the burner can be reduced, thereby reducing the pressure loss of the gas, so that the mixed gas input to the burner maintains a relatively high pressure, so that the mixed gas in the burner has a relatively high flow rate, enabling the mixed gas to fully contact with air on the burner for combustion and improving the stability of the flame.

[0084] Finally, it should be noted that the above embodiments are only used to illustrate the present invention, rather than to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, those of ordinary skill in the art should understand that various combinations, modifications or equivalent substitutions of the technical solutions of the present invention do not depart from the spirit and scope of the technical solutions of the present invention, and should all be covered within the scope of the present invention.

Claims

1. A gas premixing component, characterized in that Comprising: A regulating valve, the regulating valve is provided with an air outlet end for outputting gas; A Venturi tube, the Venturi tube is provided with a connection end, and the connection end is directly connected and communicated with the air outlet end; A wrapping member, the wrapping member wraps the connection part of the air outlet end and the connection end.

2. The gas premixing assembly according to claim 1, wherein, The regulating valve is provided with a first limiting surface at the air outlet end, the Venturi tube is provided with a second limiting surface at the connection end, one end of the wrapping member abuts against the first limiting surface, and the other end abuts against the second limiting surface.

3. The gas premixing assembly according to claim 1, characterized in that A first sealing member is clamped between the wrapping member and the outer peripheral wall of the air outlet end.

4. The gas premixing component according to claim 3, characterized in that, There are multiple first sealing members, and the multiple sealing members are spaced along the height direction of the air outlet end.

5. The gas premixing assembly according to claim 4, characterized in that, The distance between any two adjacent first sealing members is 1 mm - 3 mm.

6. The gas premixing component according to claim 4, wherein The multiple first sealing members are evenly distributed along the height direction of the air outlet end.

7. The gas premixing component according to claim 1, characterized in that, A plurality of second sealing members are clamped between the wrapping member and the outer peripheral wall of the connection end, and the plurality of second sealing members are spaced along the height direction of the connection end.

8. The gas premixing assembly according to claim 7, characterized in that, The distance between any two adjacent second sealing members is 1 mm - 3 mm.

9. The gas premixing component according to claim 1, characterized in that, It further includes a pneumatic regulating tube. There is a pneumatic regulating cavity in the regulating valve, and the pneumatic regulating cavity is used to regulate the flow rate of the regulating valve. One end of the pneumatic regulating tube is connected and communicated with the Venturi tube, and the other end of the pneumatic regulating tube is connected to the regulating valve and communicated with the pneumatic regulating cavity.

10. The gas premixing assembly according to claim 9, characterized in that, The pneumatic regulating tube is a straight tube.

11. The gas premixing component according to claim 1, wherein, It further includes a fan. The Venturi tube is further provided with an air guiding end and an output end, and the air guiding end, the output end and the connection end are communicated with each other. The fan is connected and communicated with the air guiding end, or the fan is connected and communicated with the output end.

12. The gas premixing component according to claim 11, wherein, It further includes an adapter flange, and the adapter flange is connected and communicated with the output end. The adapter flange is suitable for being connected with a burner to convey gas to the burner.

13. A gas stove, characterized in that, Comprising: A gas premixing assembly, the gas premixing assembly is the gas premixing assembly according to any one of claims 1 - 12; A burner, and the burner is connected and communicated with the adapter flange of the gas premixing assembly.

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