WO2026002011A1 - 单向阀及其加工方法 - Google Patents

单向阀及其加工方法

Info

Publication number
WO2026002011A1
WO2026002011A1 PCT/CN2025/103338 CN2025103338W WO2026002011A1 WO 2026002011 A1 WO2026002011 A1 WO 2026002011A1 CN 2025103338 W CN2025103338 W CN 2025103338W WO 2026002011 A1 WO2026002011 A1 WO 2026002011A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
valve seat
diaphragm
stop
limiting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/CN2025/103338
Other languages
English (en)
French (fr)
Inventor
朱婕
金华海
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Dunan Artificial Environment Co Ltd
Original Assignee
Zhejiang Dunan Artificial Environment Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN202410841179.7A external-priority patent/CN121206255A/zh
Priority claimed from CN202421487899.XU external-priority patent/CN222596882U/zh
Application filed by Zhejiang Dunan Artificial Environment Co Ltd filed Critical Zhejiang Dunan Artificial Environment Co Ltd
Publication of WO2026002011A1 publication Critical patent/WO2026002011A1/zh
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K15/00—Check valves
    • F16K15/14—Check valves with flexible valve members

Definitions

  • This application relates to the field of one-way valve technology, and in particular to a one-way valve and its processing method.
  • Diaphragm check valves are widely used in air conditioning systems. They typically consist of a valve body, valve seat, magnet, and diaphragm.
  • the valve seat is installed within the valve body and has an opening for refrigerant flow.
  • the magnet in the shape of a long strip, is installed inside the valve seat and attracts the diaphragm, causing it to cover the valve opening.
  • the refrigerant flows in the forward direction, it overcomes the magnetic force, opening the diaphragm and the valve.
  • the diaphragm Under the combined force of the magnet and refrigerant pressure, blocks the valve opening, thus cutting off the flow.
  • the diaphragm check valve utilizes the interaction between the magnet and the diaphragm to achieve unidirectional refrigerant flow.
  • magnets are often installed and fixed by interference fit with the inner wall of the mounting space on the valve seat.
  • the refrigerant flowing through the valve port will impact the magnet.
  • the magnet Under long-term impact, the magnet may loosen and fall off the valve seat, causing the product to fail.
  • This application provides a one-way valve, which includes a valve body and a valve seat assembly installed in the valve body.
  • the valve seat assembly includes a valve seat and a magnet.
  • the valve seat has a valve port extending axially through the valve seat and an annular groove communicating with the valve port.
  • the annular groove has two sidewalls distributed axially along the valve seat, and one of the sidewalls has a clearance groove extending axially through itself.
  • the end of the magnet can be installed into the annular groove through the clearance groove, and the magnet can rotate relative to the valve seat in the annular groove at a preset angle in the circumferential direction of the valve seat, so that the two sidewalls of the annular groove form an axial stop for the magnet.
  • the clearance groove forms a stop portion.
  • the magnet rotates circumferentially in the annular groove, it forms a stop with the stop portion to restrict the end of the magnet from rotating into the clearance groove and prevent the magnet from rotating to the clearance groove position and dislodging from the valve seat.
  • a stop point is defined on the side of the opening where the clearance groove communicates with the valve port, wherein each stop point is capable of deforming toward the interior of the annular groove in response to an external force to form the stop portion.
  • the number of clearance grooves is two, and the two clearance grooves are arranged opposite each other in the radial direction of the valve seat; wherein, any two adjacent stop points along the circumference of the valve seat form the stop portion, or all the stop points form the stop portion.
  • the sidewall of the annular groove is further provided with a limiting groove.
  • the limiting groove and the clearance groove are spaced apart along the circumference of the valve seat.
  • the side of the opening where the limiting groove communicates with the valve port is defined as a limiting point.
  • Each limiting point can deform toward the inside of the annular groove in response to external force to form a limiting part.
  • the limiting part can stop the magnet along the circumference of the valve seat to prevent the end of the magnet from rotating along the circumference of the valve seat.
  • the shortest distance between the limiting portion and the stop portion is equal to the width of the magnet; and/or, the number of the limiting grooves is two, and the two limiting grooves are arranged opposite each other along the radial direction of the valve seat.
  • the stop portion is a riveted structure; and/or, the limiting portion is a riveted structure.
  • the valve seat assembly further includes a diaphragm and a limiting bracket.
  • One end of the limiting bracket is connected to the valve seat, and the other end forms a limiting portion.
  • the diaphragm is movably installed within the limiting bracket, and the diaphragm and the magnet are magnetically coupled, and the diaphragm can be sealed at the valve port under the attraction of the magnet.
  • the diaphragm moves away from the valve seat under the action of an external force, the diaphragm can stop at the limiting portion and make line-to-surface or surface-to-surface contact with the limiting portion.
  • the limiting bracket includes a main body and a limiting part. One end of the main body is connected to the valve seat, and the other end is connected to the limiting part.
  • the limiting bracket and the valve seat form a flow cavity.
  • the diaphragm is movably installed in the flow cavity to open or close the valve port.
  • the limiting part is set at an angle to the main body, and the end of the limiting part away from the main body extends into the flow cavity and forms a stop plane or a stop ridge. When the diaphragm moves toward the valve seat, the diaphragm can seal against the valve seat, and the valve port is closed.
  • the diaphragm When the diaphragm moves away from the valve seat, the diaphragm can abut against the stop plane and form a surface-to-surface contact with the stop plane, or the diaphragm can abut against the stop ridge and form a line-to-surface contact with the stop ridge, and the valve port is opened.
  • the main body includes a columnar segment and an arc-shaped segment, one end of the arc-shaped segment is connected to the columnar segment, and the other end is connected to the limiting part; wherein, the limiting part has a through hole communicating with the flow cavity.
  • the limiting part, the columnar segment, and the arc-shaped segment are integrally bent and formed.
  • the vertical distance from the stop protrusion to the connection between the limiting portion and the arc-shaped segment is defined as H1
  • the vertical distance from the connection between the limiting portion and the arc-shaped segment to the connection between the arc-shaped segment and the columnar segment is defined as h1 , satisfying that H1 > h1 .
  • the main body includes a columnar segment, an arc-shaped segment, and a blocking segment.
  • the blocking segment blocks one end of the flow cavity, and the periphery of the blocking segment is connected to the arc-shaped segment and the columnar segment is connected through the arc-shaped segment.
  • the limiting portion protrudes and is connected to the end face of the blocking segment near the flow cavity.
  • the vertical distance from the stop protrusion to the connection between the limiting portion and the blocking segment is defined as H2
  • the vertical distance from the connection between the blocking segment and the arc segment to the connection between the arc segment and the column segment is defined as h2 , satisfying that H2 > h2 .
  • the one-way valve further includes a filter screen disposed at the end of the valve seat away from the diaphragm and connected to the valve seat.
  • the one-way valve further includes a retaining ring, which is sleeved on one end of the valve seat and connected to the valve seat; wherein one end of the filter screen is sandwiched between the retaining ring and the valve seat.
  • the valve seat assembly further includes a diaphragm, the inner wall of the valve body protruding in a direction close to the axis to form a protrusion, the diaphragm being disposed between the valve seat and the protrusion, and the diaphragm being able to stop against the protrusion when the diaphragm moves in a direction away from the valve seat.
  • the protrusion includes a plurality of stop protrusions spaced axially along the inner wall of the valve body; or, the protrusion is a stop ring extending circumferentially along the inner wall of the valve body.
  • the diaphragm has an overflow hole, and along the axial direction of the diaphragm, the projection of the valve port on the diaphragm does not overlap with the overflow hole, and the projection position of the valve port on the diaphragm is located inside the overflow hole on the diaphragm.
  • the valve body includes a first valve tube and a second valve tube, and a connecting boss is formed on the outer side wall of the valve seat.
  • One end of the connecting boss is attached to and connected to the end of the first valve tube, and the other end is attached to and connected to the end of the second valve tube; or, the valve body is an integral structure.
  • This application also provides a method for processing a one-way valve.
  • This method is used to process the one-way valve described in any of the above embodiments.
  • the processing method includes the following steps: processing a valve port and an annular groove on a valve seat, and cutting a clearance groove on one side wall of the annular groove; inserting the end of a magnet into the annular groove through the clearance groove and rotating it by a preset angle; riveting a stop point on the clearance groove to cause the stop point to deform toward the inside of the annular groove; and connecting the valve seat to the valve body.
  • Figure 1 is a cross-sectional view of a one-way valve according to an embodiment of this application.
  • Figure 2 is a cross-sectional view of a valve seat assembly according to an embodiment of this application.
  • Figure 3 is a schematic diagram of the structure of a valve seat according to an embodiment of this application.
  • Figure 4 is a structural schematic diagram of a valve seat according to another embodiment provided in this application.
  • Figure 5 is a cross-sectional view of a one-way valve according to an embodiment of this application.
  • Figure 6 is a cross-sectional view of a valve seat assembly according to an embodiment of this application.
  • Figure 7 is a structural schematic diagram of a limiting bracket according to an embodiment of this application.
  • Figure 8 is a cross-sectional view of a one-way valve according to an embodiment of this application.
  • Figure 9 is an enlarged view of the structure at point Q in Figure 8.
  • the symbols in the diagram represent the following meanings: 100. Check valve; 10. Valve body; 11. First valve tube; 12. Second valve tube; 20. Valve seat assembly; 21. Valve seat; 2101, Valve port; 2102, Annular groove; 2103, Clearance groove; 2103a, Stop point; 2104, Limiting groove; 2104a, Limiting point; 211, Connecting boss; 22, Magnet; 23, Diaphragm; 231, Flow hole; 24, Limiting bracket; 2401, Flow chamber; 2402, Flow port; 2403, Through hole; 241, Main body; 2411, Columnar section; 2412, Arc-shaped section; 242, Limiting part; 2421, Stopping plane; 2422, Stopping ridge; 25, Filter screen; 26, Fixing ring; 27, Protrusion.
  • 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.
  • a feature defined as “first” or “second” may explicitly or implicitly include at least one of that feature.
  • “multiple” means at least two, such as two, three, etc., unless otherwise explicitly specified.
  • the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium.
  • “above,” “over,” and “on top” the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature.
  • “Below,” “below,” and “under” the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
  • Diaphragm check valves are widely used in air conditioning systems. They typically consist of a valve body, valve seat, magnet, and diaphragm.
  • the valve seat is installed within the valve body and has an opening for refrigerant flow.
  • the magnet in the shape of a long strip, is installed inside the valve seat and attracts the diaphragm, causing it to cover the valve opening.
  • the refrigerant flows in the forward direction, it overcomes the magnetic force, opening the diaphragm and the valve.
  • the diaphragm Under the combined force of the magnet and refrigerant pressure, blocks the valve opening, thus cutting off the flow.
  • the diaphragm check valve utilizes the interaction between the magnet and the diaphragm to achieve unidirectional refrigerant flow.
  • magnets are often installed and fixed by interference fit with the inner wall of the mounting space on the valve seat.
  • the refrigerant flowing through the valve port will impact the magnet.
  • the magnet Under long-term impact, the magnet may loosen and fall off the valve seat, causing the product to fail.
  • the one-way valve 100 includes a valve body 10 and a valve seat assembly 20 installed within the valve body 10.
  • the valve seat assembly 20 includes a valve seat 21 and a magnet 22.
  • the valve seat 21 has a valve port 2101 extending axially through the valve seat 21 and an annular groove 2102 communicating with the valve port 2101.
  • the annular groove 2102 has two sidewalls distributed axially along the valve seat 21, and one sidewall has a clearance groove 2103 extending axially through the valve seat 21.
  • the end of the magnet 22 can be installed into the annular groove 2102 via the clearance groove 2103, and the magnet 22 can rotate relative to the valve seat 21 at a predetermined angle circumferentially within the annular groove 2102, so that the two sidewalls of the annular groove 2102 form an axial stop for the magnet 22.
  • the clearance groove 2103 forms a stop.
  • the magnet 22 rotates circumferentially in the annular groove 2102, it forms a stop with the stop to restrict the end of the magnet 22 from rotating into the clearance groove 2103, thus preventing the magnet 22 from rotating to the position of the clearance groove 2103 and coming out of the valve seat 21.
  • the magnet 22 can easily extend into the annular groove 2102 through the clearance groove 2103. Compared to the traditional interference fit connection method, this greatly reduces the installation difficulty of the magnet 22. Furthermore, after the magnet 22 extends into the annular groove 2102, by rotating the magnet 22, its end can deviate from the clearance groove 2103 while forming a stop fit with both sides of the annular groove 2102 along the axial direction of the valve seat 21. This ensures that the magnet 22 can only rotate and will not move along the axial direction of the valve seat 21, further guaranteeing the reliability of the magnet 22 installation.
  • the clearance groove 2103 can be machined to form a stop portion, which restricts the rotation of the magnet 22, preventing the end of the magnet 22 from rotating back into the clearance groove 2103, effectively preventing the magnet 22 from detaching from the annular groove 2102.
  • the magnet 22 can be firmly fixed in the valve seat 21, which greatly improves the reliability of the magnet 22 installation, thereby helping to improve the reliability of the one-way valve 100 during operation.
  • the shape of the clearance groove 2103 can be adapted to the shape of the end of the magnet 22, as long as it can satisfy the insertion of the magnet 22.
  • a stop point 2103a is defined on the side of the opening where the clearance groove 2103 communicates with the valve port 2101.
  • Each stop point 2103a can deform toward the interior of the annular groove 2102 in response to external force to form a stop portion.
  • the stop point 2103a is the corner position of the clearance groove 2103 near the valve port 2101. In this way, the forming of the stop part is simple and easy to process.
  • the stop part can also be set as an independent structure and protrude and connect to the side wall of the relief groove 2103, as long as it can achieve the same stopping effect on the end of the magnet 22.
  • the length of the magnet 22 can be reasonably controlled so that one end of the magnet 22 is inserted into the annular groove 2102, and the other end extends into the annular groove 2102 through the clearance groove 2103. This achieves the installation of the magnet 22 and ensures that the magnet 22 will not have a large displacement along the radial direction of the valve seat 21.
  • the two stop points 2103a on the clearance groove 2103 both form stop parts to prevent the magnet 22 from rotating into the clearance groove 2103 through the side of the clearance groove 2103 without the stop part when rotating around the circumference of the valve seat 21. This achieves reliable limiting between the magnet 22 and the valve seat 21.
  • a stop portion is formed at any two adjacent stop points 2103a along the circumference of the valve seat 21.
  • the two stops can be formed by machining two stop points 2103a on any one of the clearance grooves 2103, or by machining a stop point 2103a on one of the clearance grooves 2103 and an adjacent stop point 2103a on the other clearance groove.
  • the specific settings can be reasonably configured according to actual needs.
  • all the stopping points 2103a on the two clearance slots 2103 form stopping portions. In this way, the reliability of the limiting can be further improved, both ends of the magnet 22 can be stopped when rotating, improving the uniformity of force and reducing the risk of the magnet 22 falling off if one of the stopping portions fails.
  • a limiting groove 2104 is further provided on the side wall of the annular groove 2102.
  • the limiting groove 2104 and the clearance groove 2103 are spaced apart along the circumference of the valve seat 21.
  • the side portion at the opening where the limiting groove 2104 communicates with the valve port 2101 is defined as the limiting point 2104a.
  • Each limiting point 2104a can deform towards the inside of the annular groove 2102 in response to external force to form a limiting part.
  • the limiting part can stop the magnet 22 along the circumference of the valve seat 21 to prevent the end of the magnet 22 from rotating along the circumference of the valve seat 21.
  • the limiting part can play the same stopping effect as the stop part.
  • the two work together to limit the rotation range of the magnet 22 along the valve seat 21, thereby reducing the risk of damage or breakage caused by the long-term rotation of the magnet 22.
  • the width of the limiting groove 2104 along the circumference of the valve seat 21 can be reasonably set.
  • the width of the limiting groove 2104 along the circumference of the valve seat 21 can be set to be smaller than the width of the clearance groove 2103 along the circumference of the valve seat 21 to prevent the magnet 22 from falling off through the limiting groove 2104, thus improving safety.
  • the width of the limiting groove 2104 along the circumference of the valve seat 21 can be set to be greater than or equal to the width of the clearance groove 2103 along the circumference of the valve seat 21.
  • the magnet 22 can also be inserted into the annular slot 2102 through the limiting groove 2104, reducing the installation difficulty of the magnet 22. That is, the limiting groove 2104 does not require high machining precision, which can effectively reduce the machining difficulty and machining cost.
  • the width of the limiting groove 2104 is equal to the width of the clearance groove 2103.
  • the limiting groove 2104 can perform essentially the same function as the clearance groove 2103.
  • the limiting point 2104a on the limiting groove 2104 and the stopping point 2103a on the clearance groove 2103 can be processed into limiting parts or stopping parts according to actual needs, as long as they can prevent the magnet 22 from detaching.
  • the stop is a riveted structure, which facilitates the forming of the stop and reduces the processing difficulty of the stop.
  • the limiting part is a riveted structure, which facilitates the forming of the limiting part and reduces the processing difficulty of the limiting part.
  • limiting grooves 2104 which are arranged opposite each other radially along the valve seat 21. This further improves the reliability of the limiting part in limiting the magnet 22.
  • the shortest distance between the limiting part and the stop part is equal to the width of the magnet 22. In this way, the ends of the magnet 22 can be stopped by the limiting part and the stop part on both sides of the valve seat 21 in the circumferential direction, thereby fixing the magnet 22, effectively preventing the magnet 22 from being damaged due to rotation, and improving the service life of the magnet 22.
  • the shortest distance between the limiting part and the stop part may be slightly greater than the width of the magnet 22, so that the magnet 22 can only rotate within a small range.
  • the valve seat assembly 20 further includes a diaphragm 23, which is movably disposed at one end of the valve seat 21.
  • the diaphragm 23 and the magnet 22 are magnetically coupled, and the diaphragm 23 can be sealed at the valve port 2101 under the attraction of the magnet 22.
  • the diaphragm 23, through its cooperation with the magnet 22, can close the valve port 2101 when there is no refrigerant flow.
  • both the clearance groove 2103 and the limiting groove 2104 are located at the end of the limiting slot away from the diaphragm 23, so as to reduce the impact on the fit between the valve seat 21 and the diaphragm 23.
  • the valve seat assembly 20 further includes a limiting bracket 24.
  • One end of the limiting bracket 24 is connected to the valve seat 21, and the other end forms a limiting portion 242.
  • the diaphragm 23 is movably installed within the limiting bracket 24. When the diaphragm 23 moves away from the valve seat 21 under the action of an external force, the diaphragm 23 can be stopped at the limiting portion 242. In this way, the limiting portion 242 on the limiting bracket 24 can reliably limit the diaphragm 23.
  • a stop plane 2422 is formed on the side of the limiting portion 242 facing the valve port 2101, and the diaphragm 23 is stopped by the stop plane 2422.
  • the stop engagement between the limiting portion 242 and the diaphragm 23 is achieved through surface-to-surface contact. It can be understood that in other embodiments, the stop engagement between the limiting portion 242 and the diaphragm 23 can also be achieved through line-to-surface contact.
  • the limiting bracket 24 and the valve seat 21 are fixedly connected by welding or snap-fit, and a flow cavity 2401 communicating with the valve port 2101 is formed between the limiting bracket 24 and the valve seat 21.
  • a flow port 2402 communicating with the flow cavity 2401 is opened on the periphery of the limiting bracket 24, thus enabling the smooth flow of refrigerant.
  • the end face of the limiting bracket 24 located at the end of the flow cavity 2401 away from the valve seat 21 forms a stop plane 2421.
  • the limiting bracket 24 includes a main body 241 and a limiting part 242. One end of the main body 241 is connected to the valve seat 21, and the other end is used to connect to the limiting part 242.
  • the limiting bracket 24 and the valve seat 21 form a flow cavity 2401, and the diaphragm 23 is movably installed in the flow cavity 2401 to open or close the valve port 2101.
  • the limiting part 242 is set at an angle to the main body 241, and the end of the limiting part 242 away from the main body 241 extends into the flow cavity 2401 and forms a stop plane 2421.
  • the included angle between the limiting part 242 and the main body part 241 is 90 degrees, so that the formed stop plane 2421 is parallel to the upper surface of the diaphragm 23, so as to form surface-to-surface contact.
  • the diaphragm 23 when the diaphragm 23 moves toward the valve seat 21, the diaphragm 23 can seal against the valve seat 21, and the valve port 2101 is closed; when the diaphragm 23 moves away from the valve seat 21, the diaphragm 23 can abut against the stop plane 2421 and form surface-to-surface contact with the stop plane 2421, at which time the valve port 2101 is opened.
  • the limiting portion 242 and the diaphragm 23 are in line-surface contact.
  • the limiting portion 242 is set at an angle to the main body portion 241, and the end of the limiting portion 242 away from the main body portion 241 extends into the flow cavity 2401 and forms a stop ridge 2422.
  • the diaphragm 23 can seal against the valve seat 21, and the valve port 2101 is closed.
  • the diaphragm 23 moves away from the valve seat 21, the diaphragm 23 can abut against the stop ridge 2422 and form line-surface contact with the stop ridge 2422, at which time the valve port 2101 is opened.
  • the angle between the limiting part 242 and the main body 241 is less than 90 degrees, causing the end of the limiting part 242 away from the main body 241 to tilt downwards.
  • This allows a stop ridge 2422 to form at the lower edge of the end of the limiting part 242 away from the main body 241, creating a line-surface contact with the diaphragm 23.
  • This effectively reduces the contact area between the diaphragm 23 and the limiting bracket 24, thereby weakening the tension of the refrigerant between the limiting bracket 24 and the diaphragm 23.
  • the resistance that the diaphragm 23 needs to overcome when resealing the valve port 2101 is smaller, significantly reducing the difficulty of the diaphragm 23's resuscitation.
  • the resuscitation resistance is reduced, there is no need to increase the volume of the magnet 22 to enhance the magnetic force. This not only reduces manufacturing costs but also minimizes the impact of increased volume on refrigerant flow. Additionally, this design reduces the magnetic force required to open the valve, making the opening of the one-way valve 100 simpler.
  • the flow port 2402 on the periphery of the limiting bracket 24, which is connected to the flow cavity 2401, can effectively solve this problem in order to facilitate the smooth flow of the refrigerant.
  • the main body 241 includes a columnar segment 2411 and an arc-shaped segment 2412. One end of the arc-shaped segment 2412 is connected to the columnar segment 2411, and the other end is connected to the limiting part 242.
  • the limiting part 242 has a through hole 2403 communicating with the flow cavity 2401.
  • the columnar segment 2411 is used to limit and guide the diaphragm 23, while the arc-shaped segment 2412 serves as a smooth transition between the columnar segment 2411 and the limiting portion 242, reducing stress concentration and preventing turbulence of the refrigerant, thus improving the flow performance of the refrigerant.
  • the through-hole 2403 in the limiting portion 242 helps reduce the molding difficulty of the limiting portion 242.
  • the flow port 2402 is located on the columnar section 2411.
  • the limiting part 242, the columnar segment 2411, and the arc-shaped segment 2412 are integrally bent and formed. That is, the arc-shaped segment 2412 and the limiting part 242 can be formed by stamping and bending the end of the columnar segment 2411 away from the valve seat 21, so as to improve the forming efficiency of the limiting bracket 24 and reduce the processing steps.
  • the vertical distance from the stop protrusion 2422 to the connection point of the limiting part 242 and the arc-shaped segment 2412 is defined as H1
  • the vertical distance from the connection point of the limiting part 242 and the arc-shaped segment 2412 to the connection point of the arc-shaped segment 2412 and the columnar segment 2411 is defined as h1 , satisfying that H1 > h1 .
  • the diaphragm 23 is guided by the columnar segment 2411 during movement.
  • the diaphragm 23 moves to the position engaging with the stop plane, its periphery is prone to interfering with the inner wall of the arc-shaped segment 2412, posing a risk of jamming.
  • a common solution is to machine a clearance groove locally on the arc-shaped segment 2412, creating a gap between the stop plane and the arc-shaped segment 2412 to prevent jamming.
  • the diaphragm 23 will not interfere with the arc-shaped segment 2412 when linearly engaging with the stop protrusion 2422, effectively preventing jamming. Furthermore, there is no need to machine clearance grooves, further reducing processing steps and improving processing efficiency.
  • the main body 241 includes a columnar segment 2411, an arc-shaped segment 2412, and a blocking segment (not shown).
  • the blocking segment blocks one end of the flow cavity 2401, and the periphery of the blocking segment is connected to the arc-shaped segment 2412 and the arc-shaped segment 2412 is connected to the columnar segment 2411.
  • a limiting portion 242 protrudes and is connected to the end face of the blocking segment near the flow cavity 2401.
  • the blocking section can block the axial flow of the refrigerant.
  • this portion of the refrigerant can generate a certain reaction force on the movement of the diaphragm 23 toward the blocking section and the limiting part 242, thereby slowing down the movement speed of the diaphragm 23 and achieving a noise reduction effect.
  • the blocking section can be configured as a disc-shaped structure, and the limiting part 242 can be fixedly connected to the blocking section by snap-fit or welding.
  • the vertical distance H2 from the stop protrusion 2422 to the connection point of the limiting part 242 and the blocking section, and the vertical distance h2 from the connection point of the blocking section and the arc-shaped section 2412 to the connection point of the arc-shaped section 2412 and the columnar section 2411 satisfy that H2 > h2 .
  • the diaphragm 23 will not interfere with the arc segment 2412 when it is linearly engaged with the stop protrusion 2422, thereby effectively preventing the diaphragm 23 from jamming. Furthermore, there is no need to process clearance grooves, which can further reduce processing steps and improve processing efficiency.
  • a protrusion 27 can be formed on the inner wall of the valve body 10 protruding towards the axis.
  • the diaphragm 23 is disposed between the valve seat 21 and the protrusion 27, and when the diaphragm 23 moves away from the valve seat 21, the diaphragm 23 can be stopped by the protrusion 27. In this way, the movement of the diaphragm 23 can also be limited.
  • the protrusion 27 can be a plurality of protrusions spaced apart along the circumference of the valve body 10.
  • the protrusion 27 can be a convex ring extending along the circumference of the valve body 10. In this way, the structure of the protrusion 27 is simple and easy to manufacture.
  • the diaphragm 23 has an overflow hole.
  • the projection of the valve port 2101 on the diaphragm 23 does not overlap with the overflow hole, and the projection position of the valve port 2101 on the diaphragm 23 is located inside the overflow hole on the diaphragm 23.
  • the axial direction of the diaphragm is also the axial direction of the valve body 10.
  • the valve seat assembly 20 further includes a filter screen 25, which is disposed at the end of the valve seat 21 away from the diaphragm 23 and connected to the valve seat 21. This allows for the filtration of impurities in the refrigerant.
  • the filter screen 25 is often fixed to the valve seat 21 by welding in related technologies, if one of them is damaged or its performance is substandard, the whole system will be scrapped, which greatly increases the cost.
  • the valve seat assembly 20 further includes a retaining ring 26, which is sleeved on one end of the valve seat 21 and connected to the valve seat 21.
  • One end of the filter screen 25 is sandwiched between the retaining ring 26 and the valve seat 21. This not only ensures the secure installation of the filter screen 25 but also allows for its disassembly, facilitating the replacement of individual components and significantly reducing production costs.
  • the valve body 10 includes a first valve tube 11 and a second valve tube 12.
  • a connecting boss 211 is formed on the outer side wall of the valve seat 21.
  • One end of the connecting boss 211 is attached to and connected to the end of the first valve tube 11, and the other end is attached to and connected to the end of the second valve tube 12.
  • first valve tube 11, the second valve tube 12, and the valve seat 21 can be fixed together by laser welding.
  • first valve tube 11 and the second valve tube 12 can be pre-fixed to the valve seat 21 by interference fit, thereby improving the reliability of the welding.
  • valve body 10 can also be configured as an integral structure.
  • the valve body 10 can be connected to the valve seat 21 by means of necking or other means, thereby realizing the fixed installation of the valve seat 21 in the valve body 10.
  • valve seat 21 Before welding the valve seat 21 and the valve body 10, the valve seat 21, diaphragm 23, limit bracket 24, magnet 22, filter screen 25 and fixing ring 26 can be assembled into valve seat assembly 20 before welding, which makes the assembly simpler.
  • This application also provides a method for processing a one-way valve 100, which is used to process the one-way valve 100 of any of the above embodiments.
  • the processing method includes steps S1, S2, S3, and S4.
  • a valve port 2101 and an annular groove 2102 are machined on the valve seat 21, and a clearance groove 2103 is cut on one side wall of the annular groove 2102.
  • the clearance groove 2103 can be provided on the side of the valve seat 21 away from the diaphragm 23.
  • step S1 further includes: cutting a limiting groove 2104 on the annular groove 2102.
  • step S3 further includes: riveting the limiting point 2104a on the limiting groove 2104 to cause the limiting point 2104a to deform toward the inside of the annular groove 2102. This further ensures the limiting effect of the magnet 22.

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Abstract

一种单向阀（100）及其加工方法。单向阀（100）包括阀体（10）及阀座组件（20），阀座组件（20）包括阀座（21）、磁铁（22）以及环形卡槽（2102），环形卡槽（2102）的一个侧壁开设有避让槽（2103）。磁铁（22）的端部经过避让槽（2103）安装至环形卡槽（2102）内，且磁铁（22）在环形卡槽（2102）内能够沿阀座（21）的周向相对阀座（21）转动预设角度。在磁铁（22）安装至环形卡槽5（2102）后，避让槽（2103）形成止挡部，磁铁（22）在周向转动时与止挡部形成止挡，以避免磁铁（22）转动至避让槽（2103）位置时从阀座（21）中脱出。

Description

单向阀及其加工方法
相关申请
本申请要求2024年6月26日申请的，申请号为202410841179.7，发明名称为“单向阀及其加工方法”，以及2024年6月26日申请的，申请号为202421487899.X，发明名称为“单向阀”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及单向阀技术领域，特别是涉及一种单向阀及其加工方法。
背景技术
膜片式单向阀广泛应用于空调系统中，其通常包括阀体、阀座、磁铁以及膜片，阀座安装于阀体内，且阀座开设有供冷媒流通的阀口，磁铁呈长条状并安装于阀座内，且磁铁能够吸引膜片，使得膜片盖设于阀口。当冷媒正向流动时，冷媒能够克服磁力作用从而冲开膜片，并打开阀口。当冷媒反向流动时，膜片在磁力和冷媒压力下会堵住阀口，实现阀口的截断。也即，膜片式单向阀利用磁铁和膜片间的配合实现了冷媒的单向流通。
在相关技术中，磁铁常通过与阀座上的安装空间的内壁过盈配合实现安装固定，然而，在使用过程中，由于流经阀口处的冷媒会对磁铁产生冲击，在长期的冲击作用下，磁铁可能会产生松动，导致磁铁从阀座上脱落，从而造成产品失效。
发明内容
基于此，有必要提供一种单向阀及其加工方法。
本申请提供一种单向阀，该单向阀包括阀体以及安装于所述阀体内的阀座组件，所述阀座组件包括阀座以及磁铁，所述阀座开设有沿轴向贯穿所述阀座的阀口以及与所述阀口连通的环形卡槽，所述环形卡槽具有沿所述阀座轴向分布的两个侧壁，且其中一个侧壁开设有沿所述阀座的轴向贯穿自身的避让槽；所述磁铁的端部能够经过所述避让槽安装至所述环形卡槽内，且所述磁铁在所述环形卡槽内能够沿所述阀座的周向相对所述阀座转动预设角度，以使所述环形卡槽的两个侧壁对所述磁铁形成轴向止挡；在所述磁铁安装至所述环形卡槽后，所述避让槽形成止挡部，所述磁铁在所述环形卡槽内周向转动时与所述止挡部形成止挡，以限制所述磁铁的端部转动至所述避让槽内，避免所述磁铁转动至所述避让槽位置从所述阀座中脱出。
在其中一个实施例中，定义所述避让槽与所述阀口连通的开口处的侧部为止挡点，其中，每一所述止挡点均能够响应外力作用产生朝向所述环形卡槽内部的形变，以形成所述止挡部。
在其中一个实施例中，所述避让槽的数量为两个，两个所述避让槽沿所述阀座的径向相对设置；其中，沿所述阀座周向相邻的任意两个所述止挡点均形成所述止挡部，或者，全部所述止挡点均形成所述止挡部。
在其中一个实施例中，所述环形卡槽的侧壁还开设有限位槽，所述限位槽与所述避让槽沿所述阀座的周向间隔设置，定义所述限位槽与所述阀口连通的开口处的侧部为限位点，且每一所述限位点均能够响应外力作用产生朝向所述环形卡槽内部的形变，以形成限位部；其中，所述限位部能够沿所述阀座的周向止挡于所述磁铁，以阻止所述磁铁的端部沿所述阀座周向的转动。
在其中一个实施例中，所述限位部和所述止挡部间的最短距离等于所述磁铁的宽度；及/或，所述限位槽的数量为两个，两个所述限位槽沿所述阀座的径向相对设置。
在其中一个实施例中，所述止挡部为铆压成型结构；及/或，所述限位部为铆压成型结构。
在其中一个实施例中，所述阀座组件还包括膜片和限位支架，所述限位支架的一端连接于所述阀座，另一端形成有限位部；所述膜片活动安装于所述限位支架内，且所述膜片和所述磁铁磁性配合，并能够在所述磁铁的吸附作用下封堵于所述阀口；当所述膜片在外力作用下朝远离所述阀座的方向移动时，所述膜片能够止挡于所述限位部，与所述限位部线面接触或者面面接触。
在其中一个实施例中，所述限位支架包括主体部和限位部，所述主体部的一端连接于所述阀座，另一端用于连接所述限位部，且所述限位支架和所述阀座围成有流通腔，所述膜片活动安装于所述流通腔内，以打开或者关闭所述阀口；其中，所述限位部与所述主体部呈夹角设置，且所述限位部远离所述主体部的一端朝所述流通腔内部延伸，并形成有止挡平面或者止挡凸棱；当所述膜片朝靠近所述阀座方向移动时，所述膜片能够与所述阀座密封抵接，所述阀口关闭；当所述膜片朝远离所述阀座方向移动时，所述膜片能够抵接于所述止挡平面并与所述止挡平面形成面面接触或者所述膜片能够抵接于所述止挡凸棱并与所述止挡凸棱形成线面接触，所述阀口开启。
在其中一个实施例中，所述主体部包括柱状段和弧状段，所述弧状段的一端连接所述柱状段，另一端连接所述限位部；其中，所述限位部开设有连通所述流通腔的通孔。
在其中一个实施例中，所述限位部、所述柱状段和所述弧状段为一体弯折成型结构。
在其中一个实施例中，沿所述限位支架的轴向，所述止挡凸棱至所述限位部和所述弧状段的连接处的垂直距离定义为H1，所述限位部和所述弧状段的连接处至所述弧状段和所述柱状段的连接处的垂直距离定义为h1，满足，H1＞h1。
在其中一个实施例中，所述主体部包括柱状段、弧状段和封堵段，所述封堵段封堵于所述流通腔的一端，且所述封堵段的周侧连接所述弧状段并通过所述弧状段连接所述柱状段；其中，所述限位部凸出并连接于所述封堵段靠近所述流通腔的端面。
在其中一个实施例中，沿所述限位支架的轴向，所述止挡凸棱至所述限位部和所述封堵段的连接处的垂直距离定义为H2，所述封堵段和所述弧状段的连接处至所述弧状段和所述柱状段的连接处的垂直距离定义为h2，满足，H2＞h2。
在其中一个实施例中，所述单向阀还包括过滤网，所述过滤网设于所述阀座远离所述膜片的一端并与所述阀座连接。
在其中一个实施例中，所述单向阀还包括固定环，所述固定环套设于所述阀座的一端并与所述阀座连接；其中，所述过滤网的一端夹设于所述固定环和所述阀座之间。
在其中一个实施例中，所述阀座组件还包括膜片，所述阀体的内壁朝靠近轴线的方向凸出形成有凸起部，所述膜片设于所述阀座和所述凸起部之间，且当所述膜片朝远离所述阀座的方向移动时，所述膜片能够止挡于所述凸起部。
在其中一个实施例中，所述凸起部包括多个沿所述阀体的内壁轴向间隔设置的止挡凸块；或者，所述凸起部为沿所述阀体内壁周向延伸的止挡凸环。
在其中一个实施例中，所述膜片开设有过流孔，沿所述膜片的轴向，所述阀口在所述膜片上的投影与所述过流孔互不重叠，且所述阀口在所述膜片上的投影位置位于所述膜片上所述过流孔的内侧。
在其中一个实施例中，所述阀体包括第一阀管和第二阀管，所述阀座的外侧壁凸出形成有连接凸台，所述连接凸台的一端贴设并连接于所述第一阀管的端部，另一端贴设并连接于所述第二阀管的端部；或者，所述阀体为一体式结构。
本申请还提供一种单向阀的加工方法，该加工方法用于加工以上任意一个实施例所述的单向阀，所述加工方法包括以下步骤：在阀座上加工出阀口和环形卡槽，并在所述环形卡槽的一侧壁切削形成避让槽；将磁铁的端部通过所述避让槽插入所述环形卡槽内，并转动预设角度；对所述避让槽上的止挡点铆压，以使所述止挡点发生朝向所述环形卡槽内部的形变；将所述阀座连接于阀体。
本申请的一个或多个实施例的细节在下面的附图和描述中提出。本申请的其它特征、目的和优点将从说明书、附图以及权利要求书变得明显。
附图说明
为了更好地描述和说明这里公开的那些发明的实施例和/或示例，可以参考一幅或多幅附图。用于描述附图的附加细节或示例不应当被认为是对所公开的发明、目前描述的实施例和/或示例以及目前理解的这些发明的最佳模式中的任何一者的范围的限制。
图1为本申请提供的一实施例的单向阀的剖视图。
图2为本申请提供的一实施例的阀座组件的剖视图。
图3为本申请提供的一实施例的阀座的结构示意图。
图4为本申请提供的另一实施例的阀座的结构示意图。
图5为本申请提供的一实施例的单向阀的剖视图。
图6为本申请提供的一实施例的阀座组件的剖视图。
图7为本申请提供的一实施例的限位支架的结构示意图。
图8为本申请提供的一实施例的单向阀的剖视图。
图9为图8中Q处的结构放大图。
图中各符号表示含义如下：
100、单向阀；10、阀体；11、第一阀管；12、第二阀管；20、阀座组件；21、阀座；
2101、阀口；2102、环形卡槽；2103、避让槽；2103a、止挡点；2104、限位槽；2104a、限位点；211、连接凸台；22、磁铁；23、膜片；231、过流孔；24、限位支架；2401、流通腔；2402、流通口；2403、通孔；241、主体部；2411、柱状段；2412、弧状段；242、限位部；2421、止挡平面；2422、止挡凸棱；25、过滤网；26、固定环；27、凸起部。
具体实施方式
为使本申请的上述目的、特征和优点能够更加明显易懂，下面结合附图对本申请的具体实施方式做详细的说明。在下面的描述中阐述了很多具体细节以便于充分理解本申请。但是本申请能够以很多不同于在此描述的其它方式来实施，本领域技术人员可以在不违背本申请内涵的情况下做类似改进，因此本申请不受下面公开的具体实施例的限制。
需要说明的是，当组件被称为“固定于”或“设置于”另一个组件，它可以直接在另一个组件上或者也可以存在居中的组件。当一个组件被认为是“连接”另一个组件，它可以是直接连接到另一个组件或者可能同时存在居中组件。本申请的说明书所使用的术语“垂直的”、“水平的”、“上”、“下”、“左”、“右”以及类似的表述只是为了说明的目的，并不表示是唯一的实施方式。
此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。在本申请的描述中，“多个”的含义是至少两个，例如两个，三个等，除非另有明确具体的限定。
在本申请中，除非另有明确的规定和限定，第一特征在第二特征“上”、“下”可以是第一特征直接和第二特征接触，或第一特征和第二特征间接地通过中间媒介接触。而且，第一特征在第二特征“之上”、“上方”和“上面”可以是第一特征在第二特征正上方或斜上方，或仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”可以是第一特征在第二特征正下方或斜下方，或仅表示第一特征水平高度小于第二特征。
除非另有定义，本申请的说明书所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同。在本申请的说明书中所使用的术语只是为了描述具体的实施方式的目的，不是旨在于限制本申请。本申请的说明书所使用的术语“及/或”包括一个或多个相关的所列项目的任意的和所有的组合。
膜片式单向阀广泛应用于空调系统中，其通常包括阀体、阀座、磁铁以及膜片，阀座安装于阀体内，且阀座开设有供冷媒流通的阀口，磁铁呈长条状并安装于阀座内，且磁铁能够吸引膜片，使得膜片盖设于阀口。当冷媒正向流动时，冷媒能够克服磁力作用从而冲开膜片，并打开阀口。当冷媒反向流动时，膜片在磁力和冷媒压力下会堵住阀口，实现阀口的截断。也即，膜片式单向阀利用磁铁和膜片间的配合实现了冷媒的单向流通。
在相关技术中，磁铁常通过与阀座上的安装空间的内壁过盈配合实现安装固定，然而，在使用过程中，由于流经阀口处的冷媒会对磁铁产生冲击，在长期的冲击作用下，磁铁可能会产生松动，导致磁铁从阀座上脱落，从而造成产品失效。
请参阅图1-图4，为解决相关技术中磁铁过盈安装会在冷媒冲击下产生脱落的问题，本申请提供一种单向阀100，该单向阀100包括阀体10以及安装于阀体10内的阀座组件20。阀座组件20包括阀座21以及磁铁22，阀座21开设有沿轴向贯穿阀座21的阀口2101以及与阀口2101连通的环形卡槽2102，环形卡槽2102具有沿阀座21轴向分布的两个侧壁，且其中一个侧壁开设有沿阀座21的轴向贯穿自身的避让槽2103。磁铁22的端部能够经过避让槽2103安装至环形卡槽2102内，且磁铁22在环形卡槽2102内能够沿阀座21的周向相对阀座21转动预设角度，以使环形卡槽2102的两个侧壁对磁铁22形成轴向止挡。在磁铁22安装至环形卡槽2102后，避让槽2103形成止挡部，磁铁22在环形卡槽2102内周向转动时与止挡部形成止挡，以限制磁铁22的端部转动至避让槽2103内，避免磁铁22转动至避让槽2103位置从阀座21中脱出。
可以理解的是，本申请通过开设环形卡槽2102和避让槽2103，磁铁22能够通过避让槽2103较为轻易地伸入环形卡槽2102，相比于传统过盈配合的连接方式，能够大大降低磁铁22的安装难度。并且，在磁铁22伸入环形卡槽2102后，通过转动磁铁22，磁铁22的端部能够在偏离避让槽2103的同时与环形卡槽2102沿阀座21轴向两侧的侧壁均形成止挡配合，从而使得磁铁22只能够产生转动而不会发生沿阀座21轴向的移动，进一步保证了磁铁22安装的可靠性。进一步地，在安装完磁铁22后，可将避让槽2103进行加工形成止挡部，并利用止挡部对磁铁22的转动进行限制，避免磁铁22端部再转入避让槽2103内，有效防止了磁铁22脱离环形卡槽2102的情况发生。如此，在环形卡槽2102的侧壁以及止挡部的止挡作用下，磁铁22能够牢固限位于阀座21，极大提升了磁铁22安装的可靠性，从而有利于提升单向阀100工作时的可靠性。
其中，避让槽2103的形状可与磁铁22端部形状相适配，只要能够满足磁铁22的插入即可。
具体地，在一实施例中，定义避让槽2103与阀口2101连通的开口处的侧部为止挡点2103a，其中，每一止挡点2103a均能够响应外力作用产生朝向环形卡槽2102内部的形变，以形成止挡部。
也即，本实施例中的止挡点2103a为避让槽2103靠近阀口2101处的拐角位置。如此，止挡部的成型简单，易于加工。
当然，在其他实施例中，也可将止挡部设置为独立的结构，并凸出连接于避让槽2103的侧壁上，只要能够对磁铁22端部起到相同的止挡效果即可。
需要说明的是，当环形卡槽2102上仅开设一个避让槽2103时，可通过合理控制磁铁22的长度，将磁铁22一端插设于环形卡槽2102内，另一端通过避让槽2103伸入环形卡槽2102，从而实现磁铁22的安装，并保证磁铁22沿阀座21径向不会产生较大位移。此时，避让槽2103上的两个止挡点2103a均形成止挡部，以防止磁铁22沿阀座21的周向转动时通过避让槽2103上未设有止挡部的一侧转动进入避让槽2103内，从而实现了磁铁22与阀座21间的可靠限位。
在一实施例中，如图3所示，避让槽2103的数量为两个，两个避让槽2103沿阀座21的径向相对设置。如此，能够进一步降低磁铁22通过避让槽2103伸入环形卡槽2102的难度。
其中，可以理解的是，两个避让槽2103上共形成四个止挡点2103a。
进一步地，在一实施例中，沿阀座21周向相邻的任意两个止挡点2103a均形成止挡部，如此，通过将任意相邻两个止挡点2103a加工形成止挡部，磁铁22在转动时，必定有一端能够与止挡部实现止挡配合，从而防止磁铁22端部进入避让槽2103内而导致磁铁22发生脱离，提升了磁铁22限位安装的可靠性。并且，仅加工两个止挡部，加工的数量较少，能够提高加工效率，降低加工成本。
具体地，两个止挡部可以通过任意一个避让槽2103上的两个止挡点2103a加工形成，也可以通过其中一个避让槽2103上的止挡点2103a与另一个避让槽2103上相邻的止挡点2103a加工形成，具体可根据实际需要合理设置。
在另一实施例中，两个避让槽2103上的全部止挡点2103a均形成止挡部。如此，能够进一步提升限位的可靠性，磁铁22在转动时的两端均能够受到止挡，提升受力的均匀性，并降低其中一个止挡部失效时存在的磁铁22掉落的风险。
在一实施例中，如图4所示，环形卡槽2102的侧壁还开设有限位槽2104，限位槽2104与避让槽2103沿阀座21的周向间隔设置，定义限位槽2104与阀口2101连通的开口处的侧部为限位点2104a，且每一限位点2104a均能够响应外力作用产生朝向环形卡槽2102内部的形变，以形成限位部。其中，限位部能够沿阀座21的周向止挡于磁铁22，以阻止磁铁22的端部沿阀座21周向的转动。
通过开设限位槽2104并将限位槽2104上的限位点2104a加工形成限位部，限位部能够起到与止挡部相同的止挡效果，二者相互配合能够限制磁铁22沿阀座21周向的转动范围，从而降低了磁铁22长期旋转活动导致的损坏或断裂的风险。
其中，限位槽2104沿阀座21周向的槽宽可合理设置。例如，可设置限位槽2104沿阀座21周向的槽宽小于避让槽2103沿阀座21周向的槽宽，以避免磁铁22通过限位槽2104发生脱落，提升安全性。或者，也可设置限位槽2104沿阀座21周向的槽宽大于或等于避让槽2103沿阀座21周向的槽宽，此时，磁铁22也可通过限位槽2104插入环形卡槽2102，降低磁铁22的安装难度。也即，限位槽2104无需较高的加工精度，能够有效降低加工难度和加工成本。
为便于说明，本申请仅以限位槽2104槽宽等于避让槽2103槽宽为例来进行简要说明，此时，限位槽2104能够起到与避让槽2103基本相同的功能。并且，限位槽2104上的限位点2104a以及避让槽2103上的止挡点2103a可根据实际需要加工成限位部或止挡部，只要能够起到防止磁铁22脱离的效果即可。
具体地，在一实施例中，止挡部为铆压成型结构，如此，便于止挡部的成型，能够降低止挡部的加工难度。
在一实施例中，限位部为铆压成型结构，如此，便于限位部的成型，能够降低限位部的加工难度。
在一实施例中，如图4所示，限位槽2104的数量为两个，两个限位槽2104沿阀座21的径向相对设置。如此，能够进一步提升限位部对磁铁22限位的可靠性。
在一实施例中，限位部和止挡部间的最短距离等于磁铁22的宽度。如此，磁铁22端部沿阀座21周向的两侧能够受到限位部和止挡部的止挡，从而实现了磁铁22的固定，有效避免了磁铁22因转动而损坏的情况发生，提升了磁铁22的使用寿命。
但不限于此，在其他实施例中，限位部和止挡部间的最短距离也可略大于磁铁22的宽度，使得磁铁22仅能够在小范围内进行旋转。
在一实施例中，如图1和图2所示，阀座组件20还包括膜片23，膜片23可活动地设于阀座21的一端，且膜片23和磁铁22磁性配合，并能够在磁铁22的吸附作用下封堵于阀口2101。如此，膜片23通过和磁铁22的配合，能够在没有冷媒流动时实现阀口2101的关闭。
在一实施例中，避让槽2103和限位槽2104均开设于限位卡槽远离膜片23的一端，以降低对阀座21与膜片23配合的影响。
具体来说，当有冷媒进入单向阀100，且冷媒从阀座21远离膜片23的一端流入阀口2101并冲击到膜片23时，受冷媒流动压力作用，冷媒能够克服磁力作用并推动膜片23远离阀口2101，从而实现阀口2101的开启。若冷媒反向从膜片23一侧朝向阀口2101处流动时，在冷媒压力以及磁铁22磁力作用下，膜片23会与阀座21紧密贴合，从而保证阀口2101的关闭。
基于此，为避免阀口2101开启时，膜片23朝远离阀口2101方向移动距离过大，导致膜片23无法实现阀口2101的再次关闭，在一实施例中，阀座组件20还包括限位支架24，限位支架24的一端连接于阀座21，另一端形成有限位部242。膜片23活动安装于限位支架24内，当膜片23在外力作用下朝远离阀座21的方向移动时，膜片23能够止挡于限位部242。如此，通过限位支架24上的限位部242能够实现膜片23的可靠限位。
在一实施例中，限位部242朝向阀口2101的一侧形成有止挡平面2422，膜片23被止挡平面2422止挡。换言之，限位部242与膜片23之间的止挡配合通过面面接触实现。可以理解，在其他实施例中，限位部242与膜片23之间的止挡配合也可通过线面接触实现。
限位支架24和阀座21间通过焊接或卡接等固定连接，且限位支架24与阀座21间围设形成有与阀口2101连通的流通腔2401，限位支架24的周侧开设有与流通腔2401连通的流通口2402，如此，能够实现冷媒的顺利流通。其中，限位支架24上位于流通腔2401远离阀座21一端的端面形成止挡平面2421。
具体而言，限位支架24包括主体部241和限位部242，主体部241的一端连接于阀座21，另一端用于连接限位部242。且限位支架24和阀座21围成有流通腔2401，膜片23活动安装于流通腔2401内，以打开或者关闭阀口2101。其中，限位部242与主体部241呈夹角设置，且限位部242远离主体部241的一端朝流通腔2401内部延伸，并形成有止挡平面2421。
需要说明的是，在本实施例中，限位部242与主体部241之间的夹角为90度，使得形成的止挡平面2421与膜片23的上表面平行，以形成面面接触。
如此，当膜片23朝靠近阀座21方向移动时，膜片23能够与阀座21密封抵接，阀口2101关闭；当膜片23朝远离阀座21方向移动时，膜片23能够抵接于止挡平面2421并与止挡平面2421形成面面接触，此时，阀口2101开启。
本申请还提供有一个实施例中，在该实施例中，限位部242与膜片23之间为线面接触。具体的，请参阅图5-图7，限位部242与主体部241呈夹角设置，且限位部242远离主体部241的一端朝流通腔2401内部延伸，并形成有止挡凸棱2422。如此，当膜片23朝靠近阀座21方向移动时，膜片23能够与阀座21密封抵接，阀口2101关闭。当膜片23朝远离阀座21方向移动时，膜片23能够抵接于止挡凸棱2422并与止挡凸棱2422形成线面接触，此时，阀口2101开启。换言之，限位部242与主体部241之间的夹角小于90度，使得限位部242远离主体部241的端部倾斜向下，如此限位部242远离主体部241的端部的下边沿处能够形成止挡凸棱2422的棱边，以与膜片23形成线面接触，能够有效减少膜片23和限位支架24的接触面积，从而减弱冷媒在限位支架24和膜片23间形成的张力。如此，膜片23在回复重新封闭阀口2101时需克服的阻力将较小，大大降低了膜片23的回复难度。另一方面，由于回复阻力减小，故无需以增大磁铁22体积的方式来提升磁力，从而不仅能够降低制造成本，还能够降低体积增大对冷媒流通的影响，同时，如此设置，开阀时所需克服的磁力减弱，单向阀100开阀也更加简单。
由于膜片23和止挡凸棱2422线性配合时，会对冷媒沿轴向的流动产生影响，为便于冷媒的顺利流动，限位支架24的周侧开设的与流通腔2401连通的流通口2402能够有效降解决此问题。
在一实施例中，如图6所示，主体部241包括柱状段2411和弧状段2412，弧状段2412的一端连接柱状段2411，另一端连接限位部242。其中，限位部242开设有连通流通腔2401的通孔2403。
可以理解的是，柱状段2411用于与膜片23限位导向配合，弧状段2412用于柱状段2411和限位部242间的平滑过渡，减小应力集中以及避免冷媒在此形成湍流，提高冷媒的流动性能。此外，在限位部242上开设通孔2403，有利于降低限位部242的成型难度。
具体地，流通口2402设于柱状段2411上。
进一步地，在一实施例中，限位部242、柱状段2411和弧状段2412为一体弯折成型结构。也即，弧状段2412和限位部242可通过柱状段2411远离阀座21的一端冲压弯折成型，以提高限位支架24的成型效率，减少加工工序。
在一实施例中，如图6所示，沿限位支架24的轴向，止挡凸棱2422至限位部242和弧状段2412的连接处的垂直距离定义为H1，限位部242和弧状段2412的连接处至弧状段2412和柱状段2411的连接处的垂直距离定义为h1，满足，H1＞h1。
通常，在传统限位支架24通过止挡平面与膜片23配合的结构中，由于膜片23移动时会受到柱状段2411的导向，当膜片23移动至与止挡平面配合的位置时，膜片23的周侧易与弧状段2412内壁产生干涉，存在膜片23卡死的风险。而通常的解决方式是在弧状段2412上局部车加工形成避让槽，以使止挡平面和弧状段2412间通过避让槽形成间隔，从而避免膜片23卡死。而在本实施例中，通过设置H1＞h1，膜片23在与止挡凸棱2422线性配合时，不会与弧状段2412产生干涉，从而有效避免了膜片23卡死，并且，也无需加工避让槽等，能够进一步减少加工工序，提高加工效率。
在一实施例中，主体部241包括柱状段2411、弧状段2412和封堵段(图未示)，封堵段封堵于流通腔2401的一端，且封堵段的周侧连接弧状段2412并通过弧状段2412连接柱状段2411。其中，限位部242凸出并连接于封堵段靠近流通腔2401的端面。
也即，在本实施例中，封堵段能够对冷媒沿轴向的流动进行阻挡，如此，当部分冷媒从膜片23和柱状段2411间的间隙进入流通腔2401内位于膜片23和封堵段间的腔室时，这一部分冷媒能够对膜片23朝封堵段和限位部242方向的移动产生一定的反作用力，从而减缓膜片23的移动速度，从而实现降噪效果。
具体地，封堵段可设置为圆盘状结构，限位部242则可通过卡接或焊接的方式与封堵段固定连接。
进一步地，在一实施例中，沿限位支架24的轴向，止挡凸棱2422至限位部242和封堵段的连接处的垂直距离H2，封堵段和弧状段2412的连接处至弧状段2412和柱状段2411的连接处的垂直距离h2，满足，H2＞h2。
如此，通过设置H2＞h2，膜片23在与止挡凸棱2422线性配合时，不会与弧状段2412产生干涉，从而有效避免了膜片23卡死，并且，也无需加工避让槽等，能够进一步减少加工工序，提高加工效率。
参见图8及图9，为了避免膜片移动距离过大，在一实施例中，也可在阀体10的内壁朝靠近轴线的方向凸出形成凸起部27，膜片23设于阀座21和凸起部27之间，且当膜片23朝远离阀座21的方向移动时，膜片23能够止挡于凸起部27。如此，同样能够实现膜片23移动的限位。
具体地，凸起部27可以为多个沿阀体10周向间隔设置的凸块结构。或者，凸起部27可以为沿阀体10周向延伸的凸环结构。如此，凸起部27的结构简单，易于加工。
进一步地，在一实施例中，膜片23上开设有过流孔，沿膜片23的轴向，阀口2101在膜片23上的投影与过流孔互不重叠，且阀口2101在膜片23上的投影位置位于膜片23上过流孔的内侧。如此，当膜片23与凸起部27止挡配合时，冷媒能够通过膜片23上的过流孔实现顺利流动，而当膜片23与阀座21密封配合时，由于过流孔与阀口2101间互不干涉，故能够保证膜片23对阀口2101的密封效果。可以理解，膜片的轴向也即阀体10的轴向。
为对冷媒中的杂质进行过滤，在一实施例中，阀座组件20还包括过滤网25，过滤网25设于阀座21远离膜片23的一端并与阀座21连接。如此，能够对冷媒中的杂质进行过滤。
进一步地，由于相关技术中过滤网25常通过焊接与阀座21实现固定，这就导致若其中一个损坏或性能不达标，便会导致整体产生报废，从而极大增加了成本。
因此，为进一步降低单向阀100的成本，在一实施例中，阀座组件20还包括固定环26，固定环26套设于阀座21的一端并与阀座21连接。其中，过滤网25的一端夹设于固定环26和阀座21之间。如此，不仅能够实现过滤网25的牢固安装，还能够实现过滤网25的拆卸，从而便于对单一部件进行替换，大大降低了生产成本。
在一实施例中，如图1所示，阀体10包括第一阀管11和第二阀管12，阀座21的外侧壁凸出形成有连接凸台211，连接凸台211的一端贴设并连接于第一阀管11的端部，另一端贴设并连接于第二阀管12的端部。如此，阀座21的安装更为简单，能够提高单向阀100整体的加工和成型效率。
具体地，第一阀管11、第二阀管12和阀座21间可通过激光焊接实现固定。同时，为避免在焊接过程中相互间产生晃动，可先将第一阀管11和第二阀管12与阀座21通过过盈实现预固定，从而提高焊接的可靠性。
在其他实施例中，也可将阀体10设置为一体式结构，此时，阀体10可通过缩颈等方式与阀座21连接，从而实现阀座21在阀体10内的固定安装。
可以理解，在阀座21和阀体10焊接前，可先将阀座21、膜片23、限位支架24、磁铁22、过滤网25以及固定环26等组合形成阀座组件20后再进行焊接，装配更为简单。
本申请还提供一种单向阀100的加工方法，该加工方法用于加工以上任意一个实施例的单向阀100，加工方法包括步骤S1、S2、S3、S4。
S1、在阀座21上加工出阀口2101和环形卡槽2102，并在环形卡槽2102的一侧壁切削形成避让槽2103，其中，避让槽2103可设于阀座21远离膜片23的一侧；
S2、将磁铁22的端部通过避让槽2103插入环形卡槽2102内，并转动预设角度，以使磁铁22的端部偏离避让槽2103；
S3、对避让槽2103上的止挡点2103a铆压，以使止挡点2103a发生朝向环形卡槽2102内部的形变；
S4、将阀座21连接于阀体10。
在一实施例中，步骤S1中还包括：在环形卡槽2102上切削形成限位槽2104。
进一步地，在一实施例中，步骤S3中还包括：对限位槽2104上的限位点2104a铆压，以使限位点2104a发生朝向环形卡槽2102内部的形变。如此，进一步确保磁铁22的限位效果。
以上所述实施例的各技术特征可以进行任意的组合，为使描述简洁，未对上述实施例中的各个技术特征所有可能的组合都进行描述，然而，只要这些技术特征的组合不存在矛盾，都应当认为是本说明书记载的范围。
以上所述实施例仅表达了本申请的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对申请专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本申请构思的前提下，还可以做出若干变形和改进，这些都属于本申请的保护范围。因此，本申请专利的保护范围应以所附权利要求为准。

Claims (21)

  1. 一种单向阀，包括阀体以及安装于所述阀体内的阀座组件，其特征在于，所述阀座组件包括阀座以及磁铁，所述阀座开设有沿轴向贯穿所述阀座的阀口以及与所述阀口连通的环形卡槽，所述环形卡槽具有沿所述阀座轴向分布的两个侧壁，且其中一个侧壁开设有沿所述阀座的轴向贯穿自身的避让槽；
    所述磁铁的端部能够经过所述避让槽安装至所述环形卡槽内，且所述磁铁在所述环形卡槽内能够沿所述阀座的周向相对所述阀座转动预设角度，以使所述环形卡槽的两个侧壁对所述磁铁形成轴向止挡；
    在所述磁铁安装至所述环形卡槽后，所述避让槽形成止挡部，所述磁铁在所述环形卡槽内周向转动时与所述止挡部形成止挡，以限制所述磁铁的端部转动至所述避让槽内，避免所述磁铁转动至所述避让槽位置从所述阀座中脱出。
  2. 根据权利要求1所述的单向阀，其中，定义所述避让槽与所述阀口连通的开口处的侧部为止挡点，其中，每一所述止挡点均能够响应外力作用产生朝向所述环形卡槽内部的形变，以形成所述止挡部。
  3. 根据权利要求2所述的单向阀，其中，所述避让槽的数量为两个，两个所述避让槽沿所述阀座的径向相对设置；
    其中，沿所述阀座周向相邻的任意两个所述止挡点均形成所述止挡部，或者，全部所述止挡点均形成所述止挡部。
  4. 根据权利要求1-3任一项所述的单向阀，其中，所述环形卡槽的侧壁还开设有限位槽，所述限位槽与所述避让槽沿所述阀座的周向间隔设置，定义所述限位槽与所述阀口连通的开口处的侧部为限位点，且每一所述限位点均能够响应外力作用产生朝向所述环形卡槽内部的形变，以形成限位部；
    其中，所述限位部能够沿所述阀座的周向止挡于所述磁铁，以阻止所述磁铁的端部沿所述阀座周向的转动。
  5. 根据权利要求4所述的单向阀，其中，所述限位部和所述止挡部间的最短距离等于所述磁铁的宽度；及/或，所述限位槽的数量为两个，两个所述限位槽沿所述阀座的径向相对设置。
  6. 根据权利要求4所述的单向阀，其中，所述止挡部为铆压成型结构；及/或，所述限位部为铆压成型结构。
  7. 根据权利要求1所述的单向阀，其中，所述阀座组件还包括膜片和限位支架，所述限位支架的一端连接于所述阀座，另一端形成有限位部；
    所述膜片活动安装于所述限位支架内，且所述膜片和所述磁铁磁性配合，并能够在所述磁铁的吸附作用下封堵于所述阀口；
    当所述膜片在外力作用下朝远离所述阀座的方向移动时，所述膜片能够止挡于所述限位部，与所述限位部线面接触或者面面接触。
  8. 根据权利要求7所述的单向阀，其中，所述限位支架包括主体部和所述限位部，所述主体部的一端连接于所述阀座，另一端用于连接所述限位部，且所述限位支架和所述阀座围成有流通腔，所述膜片活动安装于所述流通腔内，以打开或者关闭所述阀口；
    其中，所述限位部与所述主体部呈夹角设置，且所述限位部远离所述主体部的一端朝所述流通腔内部延伸，并形成有止挡平面或者止挡凸棱；
    当所述膜片朝靠近所述阀座方向移动时，所述膜片能够与所述阀座密封抵接，所述阀口关闭；
    当所述膜片朝远离所述阀座方向移动时，所述膜片能够抵接于所述止挡平面并与所述止挡平面形成面面接触或者所述膜片能够抵接于所述止挡凸棱并与所述止挡凸棱形成线面接触，所述阀口开启。
  9. 根据权利要求8所述的单向阀，其中，所述主体部包括柱状段和弧状段，所述弧状段的一端连接所述柱状段，另一端连接所述限位部；
    其中，所述限位部开设有连通所述流通腔的通孔。
  10. [根据细则91更正 22.07.2025]
    根据权利要求9所述的单向阀，其中，所述限位部、所述柱状段和所述弧状段为一体弯折成型结构。
  11. [根据细则91更正 22.07.2025]
  12. 根据权利要求9所述的单向阀，其中，沿所述限位支架的轴向，所述止挡凸棱至所述限位部和所述弧状段的连接处的垂直距离定义为H1，所述限位部和所述弧状段的连接处至所述弧状段和所述柱状段的连接处的垂直距离定义为h1，满足，H1＞h1。
  13. 根据权利要求8所述的单向阀，其中，所述主体部包括柱状段、弧状段和封堵段，所述封堵段封堵于所述流通腔的一端，且所述封堵段的周侧连接所述弧状段并通过所述弧状段连接所述柱状段；
    其中，所述限位部凸出并连接于所述封堵段靠近所述流通腔的端面。
  14. 根据权利要求12所述的单向阀，其中，沿所述限位支架的轴向，所述止挡凸棱至所述限位部和所述封堵段的连接处的垂直距离定义为H2，所述封堵段和所述弧状段的连接处至所述弧状段和所述柱状段的连接处的垂直距离定义为h2，满足，H2＞h2。
  15. 根据权利要求7所述的单向阀，其中，所述单向阀还包括过滤网，所述过滤网设于所述阀座远离所述膜片的一端并与所述阀座连接。
  16. 根据权利要求14所述的单向阀，其中，所述单向阀还包括固定环，所述固定环套设于所述阀座的一端并与所述阀座连接；
    其中，所述过滤网的一端夹设于所述固定环和所述阀座之间。
  17. 根据权利要求1所述的单向阀，其中，所述阀座组件还包括膜片，所述阀体的内壁朝靠近轴线的方向凸出形成有凸起部，所述膜片设于所述阀座和所述凸起部之间，且当所述膜片朝远离所述阀座的方向移动时，所述膜片能够止挡于所述凸起部。
  18. 根据权利要求16所述的单向阀，其中，所述凸起部包括多个沿所述阀体的内壁轴向间隔设置的凸块结构；或者，所述凸起部为沿所述阀体内壁周向延伸的凸环结构。
  19. 根据权利要求16所述的单向阀，其中，所述膜片开设有过流孔，沿所述膜片的轴向，所述阀口在所述膜片上的投影与所述过流孔互不重叠，且所述阀口在所述膜片上的投影位置位于所述膜片上所述过流孔的内侧。
  20. 根据权利要求1所述的单向阀，其中，所述阀体包括第一阀管和第二阀管，所述阀座的外侧壁凸出形成有连接凸台，所述连接凸台的一端贴设并连接于所述第一阀管的端部，另一端贴设并连接于所述第二阀管的端部；
    或者，所述阀体为一体式结构。
  21. 一种单向阀的加工方法，其特征在于，用于加工如权利要求1-19中任意一项所述的单向阀，所述加工方法包括以下步骤：
    在阀座上加工出阀口和环形卡槽，并在所述环形卡槽的一侧壁切削形成避让槽；
    将磁铁的端部通过所述避让槽插入所述环形卡槽内，并转动预设角度；
    对所述避让槽上的止挡点铆压，以使所述止挡点发生朝向所述环形卡槽内部的形变；
    将所述阀座连接于阀体。
PCT/CN2025/103338 2024-06-26 2025-06-25 单向阀及其加工方法 Pending WO2026002011A1 (zh)

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