A proportional valve module, valve device and gas-fired hot water equipment

Abstract

This utility model belongs to the field of valve technology, specifically disclosing a proportional valve module, valve device, and gas-fired water heater. The proportional valve module includes a proportional valve seat, a stepper motor, a plug, and a resilient reset component. The stepper motor includes a cooperating drive mechanism and an output shaft. The drive mechanism is mounted on the first end of the proportional valve seat and drives the output shaft to reciprocate axially. The plug is coaxially arranged with the output shaft and has a groove at its first end. The proportional valve seat has a proportional valve port at its second end. The output shaft is axially movable through the proportional valve seat and slidably inserted into the groove. The plug is used to adjust the opening degree of the proportional valve port axially. The resilient reset component applies an elastic force to the plug, causing it to move towards the drive mechanism. This utility model can better ensure the elastic force of the resilient reset component, ensuring the sensitivity of the proportional valve module to opening degree adjustment and the reliability of reset, thereby improving the reliability of the valve device and the gas-fired water heater.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to a proportional valve module, valve device and gas-fired hot water equipment. Background Technology

[0002] The gas proportional valve is a core component of a gas water heater, which controls the gas supply and demand, stabilizes the pressure, and adjusts the gas ratio.

[0003] To improve the operational accuracy of proportional valve modules, some existing gas proportional valves are driven by stepper motors. These valves include an electrically operated proportional control device, a transmission rod slidably inserted within the proportional control device, and a sealing plug assembly connected to the end of the electrically operated proportional control device. The sealing plug assembly adjusts the valve opening. An elastic reset element is also fitted onto the transmission rod, located inside the electrically operated proportional control device. When the electrically operated proportional control device is de-energized, the transmission rod retracts inwards towards the inside of the device under the elastic force of the reset element, pulling the sealing plug assembly to close the valve. Conversely, when the electrically operated proportional control device is de-energized, it uses an internal magnetic device to push the transmission rod out, opening the valve. The valve opening degree is controlled by controlling the stroke of the pushed-out transmission rod.

[0004] The existing gas proportional valve has a limited size due to the elastic reset element being sleeved on the transmission rod and located inside the electric switch proportional adjustment device. This can easily lead to insufficient elasticity of the elastic reset element, resulting in sluggish adjustment of the sealing plug assembly and unreliable reset. Consequently, the gas proportional valve has low gas flow regulation accuracy and sensitivity, which in turn reduces the water temperature regulation accuracy and user experience of existing gas water heaters using this valve. Utility Model Content

[0005] One of the technical problems solved by this utility model is to provide a proportional valve module that can effectively solve the problems of delayed opening adjustment and unreliable reset caused by insufficient elasticity of the elastic reset element in existing gas proportional valves, thereby improving the proportional adjustment accuracy and adjustment sensitivity of the proportional valve module.

[0006] The second technical problem solved by this utility model is to provide a valve device that can effectively solve the problems of delayed opening adjustment and unreliable reset caused by insufficient elasticity of the elastic reset element in existing gas proportional valves, thereby improving the proportional adjustment accuracy and adjustment sensitivity of the proportional valve module.

[0007] The third technical problem solved by this utility model is to provide a gas-fired water heater that can effectively solve the technical problem that the water temperature regulation accuracy of existing gas-fired water heaters is difficult to guarantee.

[0008] The first technical problem mentioned above is solved by the following technical solution:

[0009] A proportional valve module, comprising:

[0010] Proportional valve seat;

[0011] A stepper motor includes a drive mechanism and an output shaft that are configured to work together. The drive mechanism is mounted on the first end of the proportional valve seat and drives the output shaft to reciprocate along the axial direction.

[0012] A plug is coaxially arranged with the output shaft. A groove is provided at the first end of the plug, and a proportional valve port is provided at the second end of the proportional valve seat. The output shaft can move axially through the proportional valve seat and can be slidably inserted into the groove. The plug is used to adjust the opening degree of the proportional valve port axially.

[0013] An elastic reset member is connected to the second end of the plug, and the elastic reset member applies an elastic force to the plug to cause the plug to move toward the drive mechanism.

[0014] Compared with the prior art, the proportional valve module of this utility model has the following advantages: By using a stepper motor to realize the axial reciprocating movement of the output shaft, the stroke of the output shaft movement can be controlled more precisely, improving the operating accuracy of the proportional valve module and thus improving the flow control accuracy; at the same time, by setting a groove on the plug and inserting the output end of the output shaft into the groove, the output shaft can limit the plug, ensuring the coaxiality of the plug during valve opening, thereby improving the stability of valve opening; furthermore, since the elastic reset element is set on the side of the plug away from the drive mechanism, the setting space of the elastic reset element can be effectively guaranteed. Under the same material, a larger size model of the elastic reset element can be selected, thereby ensuring that the elastic reset element has sufficient elastic force to drive the plug to move in the direction towards the drive mechanism. Then, when the output shaft moves in the direction towards the drive mechanism, the plug can quickly follow the output shaft to move, and the sealing reliability of the plug on the proportional valve port can be improved when sealing.

[0015] In one embodiment, the plug includes:

[0016] The adjusting body has an adjusting cone that is coaxially arranged with the output shaft. The small end of the adjusting cone faces the driving mechanism. The adjusting cone is movably inserted through the proportional valve port to adjust the opening degree of the proportional valve port.

[0017] A sealing component is sleeved on the outside of the regulating body and located on the outside of the proportional valve seat. The sealing component can abut against the open end face of the proportional valve port to block the proportional valve port.

[0018] In one embodiment, the adjusting body includes an equal-diameter portion coaxially connected to the large end of the adjusting body, the diameter of the equal-diameter portion being equal to the diameter of the large end of the adjusting cone and the diameter of the proportional valve port; when the sealing component blocks the proportional valve port, the equal-diameter portion is inserted into the proportional valve port.

[0019] In one embodiment, the proportional valve seat has a valve sleeve portion, the output shaft is coaxially inserted into the valve sleeve portion, one end of the valve sleeve portion is open and forms the proportional valve port, and the side wall of the valve sleeve portion has a side vent that communicates with the proportional valve port.

[0020] In one embodiment, the proportional valve module further includes a guide sleeve, which is installed in the proportional valve seat and coaxially arranged with the output shaft. The guide sleeve has a guide through hole with both ends through it. The cross-section of the guide through hole is a non-circular cross-section. The output shaft is slidably inserted into the guide through hole and at least partially slides with the hole wall of the guide through hole.

[0021] In one embodiment, a guide portion is partially protruding from the outer wall of the output shaft. The shape of the guide portion is the same as the shape of the guide through hole, and the guide portion slides in conjunction with the guide through hole.

[0022] And / or, the proportional valve seat has a positioning step surface facing the drive mechanism, and the guide sleeve is at least partially sandwiched between the positioning step surface and the end of the drive mechanism.

[0023] In one embodiment, the drive mechanism includes a stator assembly and a rotor assembly coaxially and rotatably mounted inside the stator assembly, the stator assembly and the rotor assembly being electromagnetically driven together;

[0024] The inner wall of the rotor assembly is provided with an internal thread, and the outer wall of the output shaft is provided with an external thread. The output shaft is inserted into the rotor assembly and the internal thread and the external thread are screwed together.

[0025] The second technical problem mentioned above is solved by the following technical solution:

[0026] A valve device includes a valve body having a gas passage, characterized in that it further includes a proportional valve module as described above, wherein the proportional valve seat is sealed and installed in the valve body and its second end is sealed and inserted into the gas passage, the output shaft, the plug and the elastic reset member are all located in the gas passage, the elastic reset member is always in a compressed state, and the end of the elastic reset member away from the plug presses against the valve body;

[0027] When the plug opens the proportional valve port, the gas passage is open and the flow rate of the gas passage is adjusted by the opening degree of the proportional valve port; when the plug blocks the proportional valve port, the gas passage is disconnected.

[0028] Compared with the prior art, the valve device described in this utility model has the following advantages: by adopting the above-mentioned proportional valve module, the sensitivity and adjustment accuracy of the valve device to flow regulation can be improved, thereby improving the reliability and user experience of the valve device.

[0029] In one embodiment, the gas passage includes a gas inlet passage, a pressure stabilizing passage, and a gas outlet passage connected in sequence. The valve body includes an integrally formed proportional seat and a pressure stabilizing seat. The pressure stabilizing passage is located inside the pressure stabilizing seat, the gas outlet passage is located inside the proportional seat, and the proportional valve port is disposed inside the gas outlet passage.

[0030] The proportional valve module is installed on the proportional seat, and the valve device further includes a pressure regulating valve, which is installed on the pressure regulating seat and extends into the pressure regulating channel to regulate pressure.

[0031] The connection between the gas outlet channel and the pressure stabilizing channel has a limiting step surface facing the drive mechanism, and the second end of the elastic reset member abuts against the limiting step surface.

[0032] In one embodiment, the proportional valve module further includes a mounting base, which is mounted on the limiting step surface. The mounting base has a vent hole that connects the gas outlet channel and the pressure stabilizing channel, and the second end of the elastic reset member abuts against the mounting base.

[0033] The third technical problem mentioned above is solved by the following technical solution:

[0034] A gas-fired hot water appliance includes the valve device described above.

[0035] Compared with the prior art, the gas-fired water heater of this utility model has the following advantages: by adopting the above-mentioned valve device, the sensitivity and adjustment accuracy of the valve device to flow regulation can be improved, and the reliability and user experience of the valve device can be improved. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the valve device provided in Embodiment 1 of this utility model;

[0037] Figure 2 This is a schematic diagram of the disassembled structure of the valve device provided in Embodiment 1 of this utility model;

[0038] Figure 3This is a cross-sectional view of the proportional valve module and proportional valve seat provided in Embodiment 1 of this utility model when the output shaft abuts against the bottom of the slide groove;

[0039] Figure 4 This is a cross-sectional view of the proportional valve module and proportional valve seat provided in Embodiment 1 of this utility model when the output shaft is separated from the bottom of the slide groove;

[0040] Figure 5 for Figure 4 A magnified view of a section at point I;

[0041] Figure 6 This is a schematic diagram of the disassembled structure of the proportional valve module provided in Embodiment 1 of this utility model after removing the elastic reset component;

[0042] Figure 7 This is a schematic diagram of the valve device provided in Embodiment 2 of this utility model;

[0043] Figure 8 This is a schematic diagram of the disassembled structure of the valve device provided in Embodiment 2 of this utility model;

[0044] Figure 9 This is a cross-sectional view of the valve device provided in Embodiment 2 of this utility model.

[0045] Label Explanation:

[0046] 100. Proportional valve module; 200. Valve body; 201. Proportional seat; 202. Pressure stabilizing seat; 2021. Pressure stabilizing outlet channel; 204. Gas inlet channel; 205. Gas outlet channel; 2051. Inlet channel; 2052. Proportional valve chamber; 2053. Outlet channel; 300. Pressure stabilizing valve; 400. Solenoid switch valve; 500. Outer sealing ring;

[0047] 1. Stepper motor; 11. Drive mechanism; 111. Stator assembly; 112. Rotor assembly; 113. Sleeve; 12. Output shaft; 121. Guide section;

[0048] 2. Proportional valve seat; 21. Main seat; 211. End plate; 212. Drive seat; 22. Valve sleeve; 221. Proportional valve port; 222. Side vent; 223. Sealing ring groove;

[0049] 3. Plug; 31. Adjusting body; 311. Adjusting cone; 3111. Slide groove; 312. Equal diameter section; 313. Convex ring section; 314. Mounting shaft section; 32. Sealing component; 321. Sealing ring section;

[0050] 4. Elastic reset component; 5. Guide sleeve; 51. Sliding sleeve; 52. Limiting sleeve; 53. Guide through hole;

[0051] 6. Inner sealing ring; 7. Shaft seal; 8. End seal; 9. Elastic gasket; 10. Mounting base; 101. Vent hole. Detailed Implementation

[0052] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0053] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0054] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0055] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0056] Example 1

[0057] This embodiment provides a valve device that can be applied to a gas-fired water heater to control the on / off state of gas and regulate the gas flow rate.

[0058] like Figures 1 to 5As shown, the valve device includes a valve body 200, a solenoid valve 400, a pressure regulating valve 300, and a proportional valve module 100. The valve body 200 has a gas passage, which includes a gas inlet passage 204, a pressure regulating passage, and a gas outlet passage 205 connected in sequence. The inlet end of the gas inlet passage 204 forms an inlet, and the outlet end of the gas outlet passage 205 forms an outlet. The solenoid valve 400 is installed on the valve body 200 and is used to control the opening and closing of the gas inlet passage 204. The pressure regulating valve 300 is installed on the valve body 200 and partially extends into the pressure regulating passage to achieve pressure stabilization. The proportional valve module 100 is installed on the valve body 200 and is used to control the opening and closing of the gas outlet passage 205 and regulate the gas flow rate of the gas outlet passage 205.

[0059] The proportional valve module 100 includes a proportional valve seat 2, a stepper motor 1, a plug 3, and an elastic reset member 4. The stepper motor 1 includes a drive mechanism 11 and an output shaft 12 that are configured to cooperate with each other. The drive mechanism 11 is mounted on the first end of the proportional valve seat 2 and drives the output shaft 12 to reciprocate axially. The plug 3 is coaxially arranged with the output shaft 12. A groove 3111 is formed at the first end of the plug 3, and a proportional valve port 221 is formed at the second end of the proportional valve seat 2. The output shaft 12 is axially movable through the proportional valve seat 2 and slidably inserted into the groove 3111. The plug 3 is used to adjust the opening degree of the proportional valve port 221 axially. The elastic reset member 4 is connected to the second end of the plug 3 and applies an elastic force to the plug 3, causing the plug 3 to move towards the drive mechanism 11.

[0060] The proportional valve seat 2 is sealed and installed on the valve body 200, and its second end is sealed and inserted into the gas passage. The output shaft 12, the plug 3, and the elastic reset member 4 are all located in the gas passage. The elastic reset member 4 is always in a compressed state, and the end of the elastic reset member 4 away from the plug 3 presses against the valve body 200. When the plug 3 opens the proportional valve port 221, the gas passage is open and the flow rate of the gas passage is adjusted by the opening of the proportional valve port 221. When the plug 3 blocks the proportional valve port 221, the gas passage is disconnected.

[0061] The proportional valve module 100 and valve device provided in this embodiment use a stepper motor 1 to realize the axial reciprocating movement of the output shaft 12, which can more accurately control the stroke of the output shaft 12, improve the operating accuracy of the proportional valve module 100, and thus improve the flow control accuracy. At the same time, by setting a groove 3111 on the plug 3, the output end of the output shaft 12 is inserted into the groove 3111, and the output shaft 12 can limit the plug 3, which can ensure the coaxiality of the plug 3 during the valve opening process, thereby improving the stability of the valve opening. Furthermore, since the elastic reset member 4 is set on the side of the plug 3 away from the drive mechanism 11, the setting space of the elastic reset member 4 can be effectively guaranteed. Under the same material, the elastic reset member 4 can be selected with a larger size, thereby ensuring that the elastic reset member 4 has sufficient elastic force to drive the plug 3 to move in the direction toward the drive mechanism 11. Then, when the output shaft 12 moves in the direction toward the drive mechanism 11, the plug 3 can quickly follow the output shaft 12 to move, and when sealing, it can improve the sealing reliability of the plug 3 to the proportional valve port 221.

[0062] An intake valve port is provided within the gas intake passage 204. The valve core structure of the electromagnetic switch valve 400 can selectively block or open the intake valve port to control the opening and closing of the gas intake passage 204. In one embodiment, the electromagnetic switch valve 400 employs a double-seal structure for blocking the intake valve port. Specifically, the electromagnetic switch valve 400 has an inner sealing head and an outer sealing head spaced apart outside the inner sealing head. When the electromagnetic switch valve 400 closes the intake valve port, both the inner and outer sealing heads abut against the opening plane of the intake valve port to simultaneously block it. The structure of the electromagnetic switch valve 400 with double-seal function can be designed with reference to existing technology, which is not the focus of this utility model and will not be described further here.

[0063] It is worth noting that the specific structure, function, and cooperation structure between the electromagnetic switch valve 400 and the pressure regulating valve 300 and the valve body 200 can be set with reference to the existing technology. This is not the focus of this utility model and will not be limited or elaborated here. In addition, the proportional valve module 100 provided in this embodiment can also be applied to scenarios with only on / off control and flow regulation, that is, the electromagnetic switch valve 400 and the pressure regulating valve 300 may not be provided in the valve device.

[0064] like Figures 3 to 5 As shown, the proportional valve module 100 also includes a proportional valve seat 2, which is sealed and installed on the valve body 200. The drive mechanism 11 is installed on the first end of the proportional valve seat 2. The second end of the proportional valve seat 2 extends into the gas outlet passage 205 and is sealed and fitted with the passage wall of the gas outlet passage 205. The second end of the proportional valve seat 2 is provided with a proportional valve port 221. The output shaft 12 is axially movable and passes through the proportional valve seat 2, and the plug 3 is slidably inserted into the proportional valve port 221. The axial movement of the plug 3 adjusts the opening degree of the proportional valve port 221.

[0065] Specifically, the gas outlet passage 205 includes an inlet passage 2051, a proportional valve chamber 2052, and an outlet passage 2053 connected in sequence; the elastic reset member 4 is located in the inlet passage 2051, and the second end of the elastic reset member 4 abuts against the passage wall of the inlet passage 2051. When the plug 3 opens the proportional valve port 221, the inlet passage 2051 is connected to the proportional valve chamber 2052 through the proportional valve port 221; when the plug 3 closes the proportional valve port 221, the inlet passage 2051 and the proportional valve chamber 2052 are disconnected at the proportional valve port 221.

[0066] By setting a proportional valve seat 2, the proportional valve port 221 can be opened on the proportional valve seat 2, which simplifies the structure of the valve body 200, reduces the processing cost of the valve body 200, and thus reduces the setting cost of the valve device. At the same time, the setting of the proportional valve seat 2 makes the proportional valve module 100 a modular unit that can be disassembled and installed as a whole, which is conducive to the disassembly, assembly and maintenance of the proportional valve module 100 on the valve body 200, and also facilitates the detection of the matching setting of the proportional valve port 221 and the plug 3.

[0067] In one embodiment, the proportional valve seat 2 has a valve sleeve portion 22, and the output shaft 12 is coaxially inserted into the valve sleeve portion 22. The end of the valve sleeve portion 22 away from the drive mechanism 11 is open and forms a proportional valve port 221. A side vent 222 communicating with the proportional valve port 221 is provided on the side wall of the valve sleeve portion 22. By providing the valve sleeve portion 22, it is beneficial to achieve the coaxial arrangement of the output shaft 12, the drive mechanism 11 and the plug 3, and to achieve a sealing fit between the proportional valve seat 2 and the channel wall of the inlet channel portion 2051.

[0068] Furthermore, the proportional valve cavity 2052 extends through the valve body 200 in a direction opposite to the inlet channel portion 2051 and forms an installation port. The proportional valve seat 2 includes a main seat portion 21 and a valve sleeve portion 22. The main seat portion 21 is sealed and installed at the installation port, and the drive mechanism 11 is installed on the main seat portion 21. The valve sleeve portion 22 is connected to the side of the main seat portion 21 away from the drive mechanism 11. The valve sleeve portion 22 passes through the proportional valve cavity 2052 and is sealed and inserted into the inlet channel portion 2051.

[0069] An outer sealing ring 500 is provided between the main seat 21 and the valve body 200. The outer sealing ring 500 surrounds the mounting opening to seal the mounting gap between the main seat 21 and the valve body 200. Specifically, the valve body 200 has a sealing ring groove 223 on the opening plane of the mounting opening, and the outer sealing ring 500 is disposed in the sealing ring groove 223, and the outer sealing ring 500 is pressed between the valve body 200 and the main seat 21.

[0070] An inner sealing ring 6 is provided between the valve sleeve 22 and the channel wall of the inlet channel 2051 to seal the gap between them and prevent gas from passing through the gap. Specifically, a sealing ring groove 223 is provided on the valve sleeve 22, and the inner sealing ring 6 is installed in the sealing ring groove 223 and pressed between the bottom of the sealing ring groove 223 and the channel wall of the inlet channel 2051. In one embodiment, the end of the valve sleeve 22 is chamfered to facilitate the insertion of the valve sleeve 22 into the inlet channel 2051, thereby improving the ease of installation of the proportional valve module 100 on the valve body 200.

[0071] The main seat 21 includes an end plate 211 and a drive seat 212. The drive seat 212 and the valve sleeve 22 are respectively connected to opposite sides of the end plate 211. The end plate 211 covers the opening plane of the mounting port and is sealed to the valve body 200. The drive mechanism 11 is installed at the end of the drive seat 212 away from the end plate 211.

[0072] The drive mechanism 11 includes a stator assembly 111 and a rotor assembly 112 rotatably mounted inside the stator assembly 111. The rotor assembly 112 is electromagnetically driven to cooperate with the stator assembly 111, so that the stator assembly 111 drives the rotor assembly 112 to rotate when energized. The rotor assembly 112 has a central through hole with both ends, the wall of the central through hole is provided with internal threads, and the outer wall of the output shaft 12 is provided with external threads. The output shaft 12 passes through the central through hole, and the internal threads and external threads are engaged. Thus, when the rotor assembly 112 rotates, it drives the output shaft 12 to translate axially. Because the rotor assembly 112 and the output shaft 12 are threadedly engaged, the electrical pulse signal received by the stator assembly 111 can be converted into the linear displacement of the output shaft 12, accurately controlling the linear displacement of the output shaft 12, thereby controlling the movement of the plug 3, reducing the proportional valve differential, and improving the accuracy of gas flow regulation.

[0073] The rotor assembly 112 includes a magnetic component that electromagnetically engages with the stator assembly 111 and an inner sleeve 113 fitted inside the magnetic component. The inner sleeve 113 and the magnetic component can be fastened together by injection molding or other methods. The inner wall of the inner sleeve 113 has internal threads. It is worth noting that the specific structure of the stator assembly 111 and the rotor assembly 112, as well as their engagement structure and principle, can be set with reference to existing technology, and will not be limited or elaborated here.

[0074] To improve the operational reliability of the output shaft 12, in one embodiment, the proportional valve module 100 further includes a guide sleeve 5. The guide sleeve 5 is installed inside the proportional valve seat 2 and coaxially arranged with the output shaft 12. The guide sleeve 5 has guide holes 53 extending through both ends. The cross-section of the guide holes 53 is a non-circular cross-section. The output shaft 12 is slidably inserted into the guide holes 53 and at least partially slides against the hole wall of the guide holes 53. Thus, the guide sleeve 5 provides sliding guidance for the axial movement of the output shaft 12, ensuring the operational stability and reliability of the output shaft 12. Simultaneously, the non-circular cross-section of the guide holes 53 prevents the output shaft 12 from rotating relative to the guide sleeve 5, thereby ensuring that the output shaft 12 only performs axial translational movement.

[0075] Furthermore, a guide portion 121 is provided protruding from the outer wall of the output shaft 12. The guide portion 121 is partially provided protruding from the outer wall of the output shaft 12. The shape of the guide portion 121 is the same as the shape of the guide through hole 53. The guide portion 121 and the guide through hole 53 are slidably engaged to reduce the contact area between the output shaft 12 and the guide sleeve 5, reduce frictional resistance, improve the smoothness of the operation of the output shaft 12, and at the same time avoid the engagement between the output shaft 12 and the guide through hole 53 from affecting the threaded engagement between the output shaft 12 and the rotor assembly 112.

[0076] In one embodiment, the proportional valve seat 2 has a positioning step surface facing the drive mechanism 11, and the guide sleeve 5 is at least partially sandwiched between the positioning step surface and the end of the drive mechanism 11. This arrangement enables stable installation of the guide sleeve 5 on the proportional valve seat 2 without the need for other structures to fasten the guide sleeve 5, improving the disassembly and assembly performance of the guide sleeve 5 and simplifying the overall structure of the proportional valve module 100.

[0077] The proportional valve seat 2 has an installation cavity, which includes a main cavity and a limiting cavity. The limiting cavity is located on the side of the main cavity facing the drive mechanism 11, and its cross-sectional area is larger than that of the main cavity. The guide sleeve 5 includes a sliding sleeve 51 and a limiting sleeve 52 coaxially connected. The limiting sleeve 52 is located in the limiting cavity, and the sliding sleeve 51 is located in the main cavity. The bottom of the main cavity or the bottom of the limiting cavity forms a positioning step surface. This structure of the installation cavity and the guide sleeve 5 effectively ensures the installation stability and reliability of the guide sleeve 5 on the proportional valve seat 2, and prevents the guide sleeve 5 from shaking.

[0078] In one embodiment, the end of the sliding sleeve 51 abuts against the bottom of the main cavity, forming a positioning step surface at the bottom of the main cavity. The proportional valve module 100 also includes an elastic gasket 9, which is sleeved on the outside of the output shaft 12 and pressed between the guide sleeve 5 and the end of the drive mechanism 11. The elastic gasket 9 helps to press the guide sleeve 5 tightly, preventing it from shaking and improving its stability and reliability, thereby preventing displacement deviation of the output shaft 12 caused by the movement of the guide sleeve 5. Simultaneously, the elastic gasket 9 can also compensate for the problem of the drive mechanism 11 failing to press the guide sleeve 5 tightly due to machining or assembly errors. The elastic gasket 9 can be, but is not limited to, a corrugated gasket.

[0079] In one embodiment, a coaxial sealing groove is provided at the bottom of the main cavity, and a shaft through hole is provided at the bottom of the sealing groove. The diameter of the sealing groove is smaller than the diameter of the mounting cavity and larger than the diameter of the shaft through hole. A shaft seal 7 is provided in the sealing groove. The shaft seal 7 is pressed between the output shaft 12 and the groove wall of the sealing groove, thereby preventing gas from entering the mounting cavity through the shaft through hole, avoiding gas leakage, and improving the reliability and safety of the proportional valve module 100 and the valve device.

[0080] Preferably, at least two shaft seals 7 are provided along the axial direction of the output shaft 12 to improve sealing reliability and stability. The end of the guide sleeve 5 away from the drive mechanism 11 has a bottom structure with a bottom through hole for the output shaft 12 to pass through. A seal abuts against the bottom structure of the guide sleeve 5 to restrict the axial movement of the shaft seal 7 and further improve sealing reliability.

[0081] like Figure 5 and Figure 6 As shown, the plug 3 includes an adjusting cone 311 and a sealing component 32 coaxially connected. The adjusting cone 311 is coaxially arranged with the output shaft 12 and its small end faces the drive mechanism 11. The adjusting cone 311 passes through the proportional valve port 221. The sealing component 32 is located on the side of the adjusting cone 311 away from the electromagnetic drive mechanism 11, and the outer diameter of the sealing component 32 is larger than the diameter of the proportional valve port 221. The sealing component 32 is used to abut against the opening plane of the proportional valve port 221 to seal the proportional valve port 221. By setting the adjusting cone 311, the opening degree of the proportional valve port 221 can be adjusted by adjusting the relative position of the adjusting cone 311 at the proportional valve port 221. By setting the sealing component 32, the sealing reliability of the plug 3 on the proportional valve port 221 can be improved when the proportional valve module 100 is in the closed state. In other embodiments, the outer diameter of the larger end of the adjusting cone 311 may be larger than the diameter of the proportional valve port 221, thereby blocking the proportional valve port 221 by adjusting the cone 311.

[0082] In one embodiment, the plug 3 includes an adjusting body 31, a first end of which has a groove 3111, and a second end of which abuts against the first end of the elastic reset member 4. The adjusting body 31 includes an adjusting cone portion 311. A sealing member 32 is sleeved on the outside of the adjusting body 31, and the sealing member 32 forms a sealing surface on the side facing the drive mechanism 11. The hardness of the sealing member 32 is less than the hardness of the adjusting body 31.

[0083] By separating the adjusting body 31 and the sealing component 32, the materials of the adjusting body 31 and the sealing component 32 can be selected separately. This allows the adjusting body 31 to be made of a material with relatively high hardness, which facilitates the connection between the adjusting component and the elastic reset component 4 and the output shaft 12. It also avoids the problem of reduced adjustment sensitivity caused by the elasticity of the adjusting cone 311. By setting the elastic sealing component 32, the reliability and stability of the plug 3 in sealing the proportional valve port 221 can be guaranteed.

[0084] The regulating body 31 also includes a constant-diameter portion 312 coaxially connected to the large end of the regulating cone 311. The diameter of the constant-diameter portion 312 is equal to the diameter of the large end of the regulating cone 311, and the diameter of the constant-diameter portion 312 is equal to the diameter of the proportional valve port 221. When the plug 3 blocks the proportional valve port 221, the constant-diameter portion 312 is inserted into the proportional valve port 221 to further improve the reliability of the blockage and to make it easier to control the opening of the proportional valve port 221.

[0085] To improve the reliability of the sealing component 32, in one embodiment, the adjusting body 31 has a protruding ring portion 313. The protruding ring portion 313 is coaxially connected to the side of the adjusting cone portion 311 away from the driving mechanism 11. The side of the sealing component 32 away from the driving mechanism 11 abuts against the protruding ring portion 313. This allows the protruding ring portion 313 to restrict the sealing component 32 from swaying away from the driving mechanism 11 when it is compressed, ensuring the sealing reliability of the plug 3 when sealing the proportional valve port 221. Furthermore, the adjusting body 31 has a mounting ring groove, and the sealing component 32 is fitted into the mounting ring groove to prevent the sealing component 32 from moving along the axial direction of the adjusting body 31, thereby improving the stability and reliability of the sealing component 32.

[0086] In one embodiment, a sealing ring 321 protrudes from the side of the sealing member 32 facing the drive mechanism 11. The sealing ring 321 abuts against the open end face of the proportional valve port 221. By providing the sealing ring 321, the opening end face of the proportional valve port 221 can be squeezed and deformed to ensure a tight fit between the sealing member 32 and the opening end face of the proportional valve port 221, further improving the sealing reliability. In other embodiments, the sealing ring 321 may also protrude from the opening end face of the proportional valve port 221.

[0087] The first end of the elastic reset member 4 is sleeved on the second end of the plug 3. Specifically, the adjusting body 31 also includes a mounting shaft 314, which is located on the side of the convex ring 313 away from the adjusting cone 311. The first end of the elastic reset member 4 is sleeved on the mounting shaft 314 and abuts against the convex ring 313.

[0088] This embodiment also provides a gas-fired water heater, including the valve device described above. By employing the valve device, the sensitivity and accuracy of flow regulation can be improved, thereby enhancing the reliability and user experience of the valve device.

[0089] Example 2

[0090] This embodiment provides a proportional valve module 100 and a valve device including the proportional valve module 100. The proportional valve module 100 provided in this embodiment has a basically the same structure as that in the above embodiments, with only some differences in the configuration. This embodiment will not describe the same structure as that in the above embodiments again.

[0091] like Figures 7 to 9 As shown, in this embodiment, the valve body 200 includes an integrally formed proportional seat 201 and a pressure stabilizing seat 202. The pressure stabilizing channel is located inside the pressure stabilizing seat 202, the gas outlet channel 205 is located in the proportional seat 201, and the proportional valve port 221 is disposed inside the gas outlet channel 205. The proportional valve module 100 is installed in the proportional seat 201, and the valve device also includes a pressure stabilizing valve 300. The pressure stabilizing valve 300 is installed in the pressure stabilizing seat 202 and extends into the pressure stabilizing channel to stabilize the pressure. A limiting step surface is formed at the connection between the gas outlet channel 205 and the pressure stabilizing channel, facing the drive mechanism 11. The second end of the elastic reset member 4 abuts against the limiting step surface.

[0092] Specifically, the pressure stabilizing channel has a pressure stabilizing inlet channel, a pressure stabilizing chamber, and a pressure stabilizing outlet channel connected in sequence. The pressure stabilizing inlet channel is connected to the outlet section of the gas intake channel 204, and the pressure stabilizing outlet channel 2021 is connected to the outlet passage. The pressure stabilizing valve 300 extends into the pressure stabilizing chamber to achieve pressure stabilization. The pressure stabilizing outlet channel 2021 and the outlet channel section 2053 are set at an angle, preferably 80° to 120°, and most preferably 90°.

[0093] Furthermore, the proportional valve module 100 also includes a mounting base 10, which is mounted on the limiting step. The mounting base 10 has a vent hole 101 that connects the regulated air outlet channel and the inlet channel 2051. The second end of the elastic reset member 4 presses against the mounting base 10, thereby improving the ease of setting the elastic reset member 4 and reducing the selection requirements for the elastic reset member 4.

[0094] In this embodiment, the drive mechanism 11 includes a sleeve 113, which has a closed first end and an open second end. One end of the sleeve 113 is inserted into the central hole of the stator assembly 111 and abuts against the wall of the central hole of the stator assembly 111. The open end of the sleeve 113 has a mounting plate portion extending radially outward, which abuts against the end of the proportional valve seat 2, and an end seal 8 is provided between the two. With this arrangement, it is not necessary to install a shaft seal 7 on the output shaft 12. That is, in this embodiment, the end of the mounting cavity away from the drive mechanism 11 is open and communicates with the inner cavity of the valve sleeve portion 22, and the output shaft 12 passes through a bottom through hole opened at the bottom of the guide sleeve 5.

[0095] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0096] The specific embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A proportional valve module, characterized in that, include: Proportional valve seat (2); A stepper motor (1) includes a drive mechanism (11) and an output shaft (12) that are configured to cooperate. The drive mechanism (11) is installed at the first end of the proportional valve seat (2). The drive mechanism (11) drives the output shaft (12) to reciprocate along the axial direction. A plug (3) is coaxially arranged with the output shaft (12). The first end of the plug (3) is provided with a groove (3111), and the second end of the proportional valve seat (2) is provided with a proportional valve port (221). The output shaft (12) can be moved axially through the proportional valve seat (2) and can be slidably inserted into the groove (3111). The plug (3) is used to adjust the opening degree of the proportional valve port (221) axially. An elastic reset member (4) is connected to the second end of the plug (3). The elastic reset member (4) applies an elastic force to the plug (3) to cause the plug (3) to run toward the drive mechanism (11).

2. The proportional valve module according to claim 1, characterized in that, The plug (3) includes: The adjusting body (31) has an adjusting cone (311) coaxially arranged with the output shaft (12), the small end of the adjusting cone (311) facing the drive mechanism (11), and the adjusting cone (311) is movably inserted through the proportional valve port (221) to adjust the opening degree of the proportional valve port (221); A sealing component (32) is sleeved on the outside of the regulating body (31) and located on the outside of the proportional valve seat (2). The sealing component (32) can abut against the open end face of the proportional valve port (221) to block the proportional valve port (221).

3. The proportional valve module according to claim 2, characterized in that, The adjusting body (31) includes an equal diameter portion (312) coaxially connected to the large end of the adjusting body (31). The diameter of the equal diameter portion (312) is equal to the diameter of the large end of the adjusting cone portion (311) and the diameter of the proportional valve port (221). When the sealing component (32) blocks the proportional valve port (221), the equal diameter portion (312) is inserted into the proportional valve port (221).

4. The proportional valve module according to claim 1, characterized in that, The proportional valve seat (2) has a valve sleeve (22), and the output shaft (12) is coaxially inserted into the valve sleeve (22). The valve sleeve (22) is open at one end away from the drive mechanism (11) and forms the proportional valve port (221). The side wall of the valve sleeve (22) is provided with a side vent (222) that communicates with the proportional valve port (221).

5. The proportional valve module according to claim 1, characterized in that, The proportional valve module also includes a guide sleeve (5), which is installed in the proportional valve seat (2) and coaxially arranged with the output shaft (12). The guide sleeve (5) has a guide through hole (53) through both ends. The cross-section of the guide through hole (53) is a non-circular cross-section. The output shaft (12) is slidably inserted in the guide through hole (53) and at least partially slidably engaged with the hole wall of the guide through hole (53).

6. The proportional valve module according to claim 5, characterized in that, The outer wall of the output shaft (12) is partially provided with a guide portion (121), the shape of the guide portion (121) is the same as the shape of the guide through hole (53), and the guide portion (121) and the guide through hole (53) are slidably engaged; And / or, the proportional valve seat (2) has a positioning step surface facing the drive mechanism (11), and the guide sleeve (5) is at least partially sandwiched between the positioning step surface and the end of the drive mechanism (11).

7. The proportional valve module according to any one of claims 1-6, characterized in that, The drive mechanism (1) includes a stator assembly (11) and a rotor assembly (112) coaxially and rotatably mounted inside the stator assembly (11), wherein the stator assembly (11) and the rotor assembly (112) are electromagnetically driven together. The inner wall of the rotor assembly (112) is provided with an internal thread, and the outer wall of the output shaft (12) is provided with an external thread. The output shaft (12) is inserted into the rotor assembly (112) and the internal thread and the external thread are screwed together.

8. A valve device comprising a valve body (200) having a gas passage, characterized in that, It also includes a proportional valve module as described in any one of claims 1-7, wherein the proportional valve seat (2) is sealed and installed on the valve body (200) and the second end is sealed and inserted into the gas passage, the output shaft (12), the plug (3) and the elastic reset member (4) are all located in the gas passage, the elastic reset member (4) is always in a compressed state, and the end of the elastic reset member (4) away from the plug (3) presses against the valve body (200); When the plug (3) opens the proportional valve port (221), the gas passage is open and the flow rate of the gas passage is adjusted by the opening degree of the proportional valve port (221); when the plug (3) blocks the proportional valve port (221), the gas passage is disconnected.

9. The valve device according to claim 8, characterized in that, The gas passage includes a gas inlet passage (204), a pressure stabilizing passage, and a gas outlet passage (205) connected in sequence. The valve body (200) includes an integrally formed proportional seat (201) and a pressure stabilizing seat (202). The pressure stabilizing passage is located inside the pressure stabilizing seat (202), and the gas outlet passage (205) is located inside the proportional seat (201). The proportional valve port (221) is located inside the gas outlet passage (205). The proportional valve module is installed on the proportional seat (201), and the valve device further includes a pressure regulating valve (300), which is installed on the pressure regulating seat (202) and extends into the pressure regulating channel to regulate pressure; The gas outlet channel (205) and the pressure stabilizing channel are connected by a limiting step surface facing the drive mechanism (11), and the second end of the elastic reset member (4) presses against the limiting step surface.

10. The valve device according to claim 9, characterized in that, The proportional valve module also includes a mounting base (10), which is installed on the limiting step surface. The mounting base (10) has a vent hole (101) that connects the gas outlet channel (205) and the pressure stabilizing channel. The second end of the elastic reset member (4) presses against the mounting base (10).

11. A gas-fired hot water device, characterized in that, Includes the valve device as described in any one of claims 8-10.

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