Reversible solenoid valve and air conditioning unit having same

Abstract

A reversible solenoid valve (100) and an air conditioning unit (200) having the same. The reversible solenoid valve (100) includes a valve body (10) and a valve core assembly (20). A first communication port (11) and a second communication port (12) are formed on both sides of the valve body (10). The valve body (10) has a valve chamber (13). The valve core assembly (20) can slide within the valve chamber (13). The valve core assembly (20) includes a connecting rod (22), and a slider unit (23) and a piston unit (21) connected to both ends of the connecting rod (22). The slider unit (23) is adjacent to the first communication port (11) and the second communication port (12) provided opposite to each other and can simultaneously block the first communication port (11) and the second communication port (12). A pressure difference can be formed on both sides of the piston unit (21) to move the piston unit (21) and slide within the valve chamber (13).

Description

[Technical Field]

[0001] Related Applications This application claims priority to a Chinese patent application filed on May 20, 2021, bearing application number 202121097730.X and entitled "Reversible solenoid valve and air conditioning unit having the same," and a Chinese patent application filed on December 7, 2021, bearing application number 202111489240.9 and entitled "Reversible solenoid valve," the entire contents of which are incorporated herein by reference.

[0002] The present application relates to the technical field of refrigeration, and in particular to a reversible solenoid valve and an air conditioning unit having the same. [Background technology]

[0003] Reversible solenoid valves are typically installed in air conditioning units and are used to achieve two-way flow of medium.

[0004] The valve core assembly of the related reversible solenoid valve includes a connecting rod, a slider, and two piston units, each connected to either end of the connecting rod. When the medium moves the valve core assembly, the two piston units must be moved and slid. However, since the piston units are sealed and slide within the valve chamber, the friction is large. The medium must move the two piston units and slide, which requires a larger thrust force. As a result, the reversible solenoid valve requires a large valve opening differential pressure. Summary of the Invention

[0005] According to various embodiments of the present application, a reversible solenoid valve is provided.

[0006] The reversible solenoid valve includes a valve body and a valve core assembly, the valve body having a first communication port and a second communication port respectively drilled on both sides thereof, the valve body having a valve chamber, the valve core assembly being disposed within the valve chamber and capable of sliding within the valve chamber to establish or block communication between the first communication port and the second communication port, the valve core assembly including a piston unit, a connecting rod and a slider unit, the slider unit and the piston unit being respectively connected to both ends of the connecting rod, the slider unit being disposed adjacent to the first communication port and the second communication port and the first communication port and the second communication port being disposed opposite each other, the slider unit being capable of simultaneously blocking the first communication port and the second communication port, and a pressure difference being generated on both sides of the piston unit to move the piston unit to slide within the valve chamber.

[0007] In one embodiment, the reversible solenoid valve includes an intermediate end cover and a second end cover, the intermediate end cover is fixed within the valve chamber, and the piston unit is provided on a side of the intermediate end cover away from the first communication port and the second communication port, the intermediate end cover and the piston unit forming a first chamber, and the piston unit and the second end cover forming a second chamber.

[0008] In one embodiment, the reversible solenoid valve further includes a pilot valve, the pilot valve being provided on a valve body, the valve body having a first hole and a second hole formed therein, the first hole being connected to a first chamber, and the second hole being connected to a second chamber, the pilot valve being connected to each of the first hole and the second hole via a capillary tube, and the pilot valve controlling the differential pressure between the first chamber and the second chamber.

[0009] In one embodiment, the reversible solenoid valve further includes a first end cover, which is provided at one end of the valve body remote from the second end cover, and which forms a medium chamber together with the intermediate end cover. The slider unit is provided in the medium chamber, and when the reversible solenoid valve is in the first position, the first communication port and the second communication port are each in communication with the medium chamber.

[0010] In one embodiment, a first protrusion is provided on a side of the piston unit facing the intermediate end cover, and when the piston unit moves in a direction approaching the first communication port and the second communication port, the first protrusion can abut against the intermediate end cover, and / or a second protrusion is provided on a side of the piston unit facing the second end cover, and when the piston unit moves in a direction approaching the second end cover, the second protrusion can abut against the second end cover.

[0011] In one embodiment, a first protrusion is provided on the side of the piston unit facing the intermediate end cover, the first protrusion being annular and having a first orifice drilled into its side, allowing the medium to flow out of the groove formed by the first protrusion through the first orifice, and / or a second protrusion is provided on the side of the piston unit facing the second end cover, the second protrusion being annular and having a second orifice drilled into its side, allowing the medium to flow out of the groove formed by the second protrusion through the second orifice.

[0012] In one embodiment, a first protrusion is provided on a side surface of the piston unit facing the intermediate end cover, the first protrusion being annular, and a first throttle groove is formed in an end surface of the first protrusion facing the intermediate end cover, so that the medium can flow out of the groove formed by the first protrusion via the first throttle groove, and / or a second protrusion is provided on a side surface of the piston unit facing the second end cover, the second protrusion being annular, and a second throttle groove is formed in an end surface of the second protrusion facing the second end cover, so that the medium can flow out of the groove formed by the second protrusion via the second throttle groove.

[0013] In one embodiment, the slider unit includes a first part and a second part arranged opposite each other, the first part being capable of blocking the first communication port, the second part being capable of blocking the second communication port, a storage chamber being provided between the first part and the second part, an elastic member being provided in the storage chamber, and both ends of the elastic member being in contact with the first part and the second part, respectively.

[0014] In one embodiment, the valve chamber includes a medium chamber, the slider unit is provided in the medium chamber, a balancing hole is drilled in the first part and / or the second part, and the medium chamber is connected to the storage chamber via the balancing hole.

[0015] In one embodiment, the slider unit further includes a guide frame, which is fitted to the outside of the first and second parts and connected to the connecting rod.

[0016] The present application further provides an air conditioning unit including the above reversible solenoid valve.

[0017] The details of one or more embodiments of the application are set forth in the drawings and description that follow. Other features, objects, and advantages of the application will become apparent from the description, drawings, and claims. [Brief explanation of the drawings]

[0018] To better describe and explain the embodiments and / or examples of these applications disclosed herein, reference may be made to one or more drawings. Any additional details or examples used to explain the drawings should not be considered as limiting the scope of any of the disclosed applications, the embodiments and / or examples described herein, and the best mode of these applications as understood herein.

[0019] [Figure 1] FIG. 2 is a cross-sectional schematic view of a related reversible electromagnetic valve. [Figure 2] 1 is a diagram illustrating an overall configuration of a reversible solenoid valve according to some embodiments. [Figure 3] 1 is a cross-sectional schematic diagram of a reversible solenoid valve according to some embodiments. [Figure 4] 1 is a schematic diagram of an orifice according to some embodiments. [Figure 5] 1 is a cross-sectional schematic diagram of a reversible solenoid valve according to some embodiments. [Figure 6] 1 is a schematic diagram of a throttle groove according to some embodiments. [Figure 7]1 is a cross-sectional schematic diagram of a reversible solenoid valve according to some embodiments. [Figure 8] 1 is a cross-sectional schematic diagram of a reversible solenoid valve according to some embodiments. [Figure 9] FIG. 9 is a partially enlarged schematic view of the reversible electromagnetic valve in FIG. 8. [Figure 10] 1 is a cross-sectional schematic view of a first sealing seat of a reversible solenoid valve according to some embodiments. FIG. [Figure 11] 1 is a cross-sectional schematic view of a second sealing seat of a reversible solenoid valve according to some embodiments. FIG. [Figure 12] 1 is a cross-sectional schematic view of an intermediate end cover of a reversible solenoid valve according to some embodiments. [Figure 13] 1 is a schematic diagram illustrating the relationship between an air conditioning unit and a reversible solenoid valve according to some embodiments.

[0020] In the drawings, the meanings of the symbols are as follows: 100 Reversible solenoid valve, 110 Pilot valve, 200 Air conditioning unit, 10 Valve body, 11 First communication port, 111 First connecting pipe, 12 Second communication port, 121 Second connecting pipe, 13 Valve chamber, 131 First chamber, 132 Second chamber, 133 Medium chamber, 14 First hole, 141 First capillary tube, 15 Second hole, 151 Second capillary tube, 16 Valve seat, 20 Valve core assembly, 21 Piston unit, 211 First protrusion, 2111 First orifice, 2112 First throttle groove, 212 Second protrusion, 2121 Second orifice, 2122 Second throttle groove, 213 First piston cup, 214 Second piston cup, 215 Intermediate baffle, 216 First baffle, 217 Second baffle, 22 Connecting rod, 23 Slider unit, 231 first part, 2311 balancing hole, 232 second part, 233 accommodating chamber, 234 elastic member, 235 guide frame, 30 intermediate end cover, 31 through hole, 311 mounting groove, 312 sealing ring, 32 first end cover, 33 second end cover, 40 sleeve, 50 first sealing seat, 51 first mounting groove, 511 annular flange, 512 third sealing groove, 52 first through hole, 53 first sealing groove, 54 welding groove, 60 second sealing seat, 61 second through hole, 611 second sealing groove, 70 first sealing ring, 80 second sealing ring, 90 third sealing ring, 101 associated reversible solenoid valve, 1011 associated valve core assembly, 1012 associated connecting rod, 1013 associated piston unit, 1014 associated slider, 1015 associated valve chamber. DETAILED DESCRIPTION OF THE INVENTION

[0021] The technical aspects of the embodiments of the present application will be described below clearly and completely with reference to the drawings in the embodiments of the present application, but it is clear that the described embodiments are only some of the embodiments of the present application and do not represent all of the embodiments. Based on the embodiments of the present application, all other embodiments that can be obtained by a person skilled in the art without creative efforts fall within the scope of protection of the present application.

[0022] It should be noted that when an assembly is said to be "mounted" to another assembly, it may be mounted directly to the other assembly, or there may be an intervening assembly. When an assembly is said to be "mounted" to another assembly, it may be mounted directly to the other assembly, or there may be an intervening assembly. When an assembly is said to be "secured" to another assembly, it may be secured directly to the other assembly, or there may be an intervening assembly.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. The terms used herein in the specification of this application are for the purpose of describing specific examples only and are not intended to limit the scope of this application. The term "or" as used herein includes one or more of any and all combinations of the associated items.

[0024] Referring to FIG. 13, the reversible solenoid valve 100 provided by the present application is installed in an air conditioning unit 200 and is used to control the communication or blocking of a pipeline, thereby realizing two-way flow of a medium.

[0025] The reversible solenoid valve 100 of the present application can be used in an air conditioning unit 200 that needs to operate in two directions, for example, it can be installed in an air conditioning unit 200 that needs to have two functions, cooling mode and heating mode, at the same time, to achieve two-way flow of the medium without the need to switch pipelines. It should be noted that the medium in this application is a refrigerant.

[0026] Referring to FIG. 1, the associated valve core assembly 1011 of the associated reversible solenoid valve 101 includes an associated connecting rod 1012, an associated slider 1014, and two associated piston units 1013. The two associated piston units 1013 are respectively connected to both ends of the associated connecting rod 1012. When the medium moves the associated valve core assembly 1011, the two associated piston units 1013 need to move and slide. However, since the associated piston units 1013 are sealed and slide within the associated valve chamber 1015, the friction force is large. Therefore, the medium needs to move and slide the two associated piston units 1013, so a larger thrust is required. As a result, the associated reversible solenoid valve 101 requires a larger valve opening differential pressure.

[0027] Example 1 Referring to FIG. 3, the reversible solenoid valve 100 provided by the present application includes a valve body 10 and a valve core assembly 20. A first communication port 11 and a second communication port 12 are respectively drilled on both sides of the valve body 10. The valve body 10 has a valve chamber 13. The valve core assembly 20 is disposed in the valve chamber 13 and can slide within the valve chamber 13 to connect or disconnect the first communication port 11 and the second communication port 12.

[0028] Furthermore, a first connecting pipe 111 is provided in the first communication port 11, and a second connecting pipe 121 is provided in the second communication port 12, and the first connecting pipe 111 and the second connecting pipe 121 are respectively connected to the pipeline of the air conditioning unit.

[0029] The reversible solenoid valve 100 further includes a valve seat 16, which is mounted in the valve chamber 13, the first communication port 11 and the second communication port 12 pass through the valve body 10 and the valve seat 16, and one end of the valve core assembly 20 can move within the valve seat 16 so as to connect or disconnect the first communication port 11 and the second communication port 12.

[0030] Continuing to refer to FIG. 3, the valve core assembly 20 includes a piston unit 21, a connecting rod 22, and a slider unit 23. The slider unit 23 and the piston unit 21 are respectively connected to both ends of the connecting rod 22. The slider unit 23 is disposed adjacent to the first communication port 11 and the second communication port 12. A pressure difference can be generated on both sides of the piston unit 21 to move the piston unit 21 and slide within the valve chamber 13.

[0031] In the present application, by providing a single piston unit 21, the slider unit 23 is moved within the valve chamber 13 to connect or disconnect the first communication port 11 and the second communication port 12, thereby reducing the thrust required to move the piston unit 21, thereby reducing the valve opening differential pressure required to open the reversible solenoid valve 100 and improving the reliability of opening and closing the reversible solenoid valve 100 when the pressure is low. At the same time, while the related reversible solenoid valve 101 is provided with two piston units 1013, in the present application, a single piston unit 21 is provided, reducing the number of components and thereby reducing the overall volume of the reversible solenoid valve 100, making the reversible solenoid valve 100 more compact, saving materials, and reducing processing costs.

[0032] The first communication port 11 and the second communication port 12 are arranged opposite each other, and the slider unit 23 can simultaneously block the first communication port 11 and the second communication port 12. When the reversible solenoid valve 100 is in a closed state, if the first communication port 11 is an inlet, the first communication port 11 is blocked by the slider unit 23 and cannot communicate, and if the second communication port 12 is an inlet, the second communication port 12 is blocked by the slider unit 23 and cannot communicate, so that the reversible solenoid valve 100 operates effectively.

[0033] In the present application, the first communication port 11 of the reversible solenoid valve 100 can be the inlet, and after the mode of the air conditioning unit 200 is switched, the second communication port 12 can be the inlet. When the reversible solenoid valve 100 is closed, the slider unit 23 can simultaneously block the first communication port 11 and the second communication port 12 to prevent the medium from prying open the slider unit 23 and affecting the sealing performance.

[0034] Furthermore, the reversible solenoid valve 100 includes an intermediate end cover 30 and a second end cover 33. The intermediate end cover 30 is fixed within the valve chamber 13. The piston unit 21 is provided on the side of the intermediate end cover 30 away from the first communication port 11 and the second communication port 12. The intermediate end cover 30 and the piston unit 21 form a first chamber 131, and the piston unit 21 and the second end cover 33 form a second chamber 132. The first chamber 131 and the second chamber 132 are located on either side of the piston unit 21. When a pressure difference is formed between the first chamber 131 and the second chamber 132, the slider unit 23 can be moved to move the piston unit 21 so as to connect or disconnect the first communication port 11 and the second communication port 12.

[0035] Furthermore, a through hole 31 is formed in the intermediate end cover 30, and an attachment groove 311 for attaching a sealing ring 312 is formed in the inner wall of the through hole 31. The connecting rod 22 enters the through hole 31, with one part extending in a direction approaching the first communication port 11 and the second communication port 12 and the other part extending in a direction approaching the second end cover 33. The connecting rod 22 can move within the through hole 31, and the connecting rod 22 and the intermediate end cover 30 are sealed to each other by the sealing ring 312.

[0036] The reversible solenoid valve 100 further includes a first end cover 32, which is located at one end of the valve body 10 away from the second end cover 33. The first end cover 32 and the intermediate end cover 30 form a medium chamber 133. The slider unit 23 is located within the medium chamber 133. When the reversible solenoid valve 100 is in the first position, the first communication port 11 and the second communication port 12 communicate with the medium chamber 133. The first position refers to the position when the reversible solenoid valve 100 is open and all components are operating. The medium chamber 133 facilitates the flow of the medium. When the valve core assembly 20 slides away from the first communication port 11 and the second communication port 12, the first communication port 11 and the second communication port 12 communicate with each other via the medium chamber 133, realizing two-way medium flow.

[0037] 2 and 3, specifically, the first communication port 11 and the second communication port 12 are respectively located in the medium chamber 133, the first hole 14 and the second hole 15 are drilled in the valve body 10, the first hole 14 is connected to the first chamber 131, the second hole 15 is connected to the second chamber 132, a first capillary 141 is provided in the first hole 14, and a second capillary 151 is provided in the second hole 15, and the first capillary 141 and the second capillary 151 are connected to the pilot valve 110 described below so as to form a pressure difference between the first chamber 131 and the second chamber 132 and move the piston unit 21.

[0038] When the reversible solenoid valve 100 needs to be closed, the high-pressure refrigerant enters the second chamber 132 from the second capillary 151, and the refrigerant in the first chamber 131 flows out from the first capillary 141, so the piston unit 21 is moved in a direction toward the first communicating port 11 and the second communicating port 12. When the reversible solenoid valve 100 needs to be opened, the high-pressure refrigerant enters the first chamber 131 from the first capillary 141, and the refrigerant in the second chamber 132 flows out from the second capillary 151, so the piston unit 21 is moved in a direction away from the first communicating port 11 and the second communicating port 12.

[0039] Continuing to refer to Figure 3, a first protrusion 211 is provided on the side of the piston unit 21 facing the intermediate end cover 30, and when the piston unit 21 moves in a direction approaching the first communication port 11 and the second communication port 12, the first protrusion 211 can abut against the intermediate end cover 30, thereby reducing the impact force of the piston unit 21 on the intermediate end cover 30. 4, the first protrusion 211 is annular, and a first orifice 2111 is formed on a side of the first protrusion 211. When the piston unit 21 is moved toward the first communication port 11 and the second communication port 12, some of the medium gradually flows out of the groove formed by the first protrusion 211 through the first orifice 2111, creating resistance and mitigating the impact force of the piston unit 21 on the intermediate end cover 30, thereby enhancing the fastness of the installation of the intermediate end cover 30 and reducing noise.

[0040] 5 and 6, in another embodiment, a first throttle groove 2112 is formed in the end surface of the first protrusion 211 facing the intermediate end cover 30. When the piston unit 21 is moved toward the first communication port 11 and the second communication port 12, some of the medium gradually flows out of the groove formed by the first protrusion 211 through the first throttle groove 2112, creating resistance and mitigating the impact force of the piston unit 21 on the intermediate end cover 30, thereby enhancing the robustness of the installation of the intermediate end cover 30 and reducing noise.

[0041] Referring to Figure 3, in another embodiment, a second protrusion 212 is provided on the side of the piston unit 21 facing the second end cover 33, and when the piston unit 21 moves in a direction approaching the second end cover 33, the second protrusion 212 can abut against the second end cover 33, thereby reducing the impact force of the piston unit 21 on the second end cover 33.

[0042] Furthermore, the second protrusion 212 is annular, and a second orifice 2121 is formed on a side surface of the second protrusion 212. When the piston unit 21 is moved toward the second end cover 33, some of the medium gradually flows out of the groove formed by the second protrusion 212 through the second orifice 2121, creating resistance and mitigating the impact force of the piston unit 21 on the second end cover 33, thereby reducing noise.

[0043] 5, in another embodiment, a second throttle groove 2122 is formed in the end surface of the second protrusion 212 facing the second end cover 33. When the piston unit 21 is moved toward the second end cover 33, some of the medium gradually flows out of the recess formed by the second protrusion 212 through the second throttle groove 2122, creating resistance and mitigating the impact force of the piston unit 21 on the second end cover 33, thereby reducing noise.

[0044] Specifically, the piston unit 21 includes a first piston cup 213, a second piston cup 214, an intermediate baffle 215, a first baffle 216, and a second baffle 217, the first baffle 216, the intermediate baffle 215, and the second baffle 217 are connected to each other, the first baffle 216 and the second baffle 217 are located on both sides of the intermediate baffle 215, the first baffle 216 is provided close to the intermediate end cover 30, the first piston cup 213 is located between the first baffle 216 and the intermediate baffle 215, the second piston cup 214 is located between the intermediate baffle 215 and the second baffle 217, the first protrusion 211 is provided on the first baffle 216, and the second protrusion 212 is provided on the second baffle 217.

[0045] Continuing to refer to Figure 3, the slider unit 23 is provided in the medium chamber 133 and includes a first part 231 and a second part 232 that are provided opposite each other, the first part 231 can block the first communication port 11, and the second part 232 can block the second communication port 12, there is a storage chamber 233 between the first part 231 and the second part 232, an elastic member 234 is provided in the storage chamber 233, both ends of the elastic member 234 abut against the first part 231 and the second part 232, respectively, the first part 231 and the second part 232 can be separated by the interactive force generated between the elastic member 234 and the first part 231 and the second part 232, it becomes easier to block the first communication port 11 with the first part 231 and to block the second communication port 12 with the second part 232, and the sealing performance during blocking is improved.

[0046] Furthermore, balancing holes 2311 are drilled in the first part 231 and / or the second part 232, and the medium chamber 133 is connected to the storage chamber 233 through the balancing holes 2311. The balancing holes 2311 balance the pressure between the medium chamber 133 and the storage chamber 233, preventing the medium from pressing against the slider unit 23, thereby ensuring the stability of the slider unit 23.

[0047] 3 , the slider unit 23 further includes a guide frame 235. The guide frame 235 is fitted onto the outside of the first part 231 and the second part 232 and connected to the connecting rod 22. The guide frame 235 serves to limit and guide the slider unit 23, preventing the slider unit 23 from tilting due to the action of the medium and affecting the sealing between the first communication port 11 and the second communication port 12. At the same time, the first part 231 and the second part 232 are attached to the guide frame 235, and the connecting rod 22 moves and slides the first part 231 and the second part 232 via the guide frame 235, thereby reducing maintenance costs and improving utilization efficiency. In addition, if the guide frame 235 wears out or the connecting rod 22 breaks, it is only necessary to replace the missing parts, making replacement maintenance easy and reducing costs.

[0048] The pilot valve 110 of the reversible solenoid valve 100 is provided on the valve body 10 and is connected to each of the first capillary tube 141 and the second capillary tube 151. By changing the direction of the pilot valve 110, the differential pressure on both sides of the piston unit 21 can be controlled, thereby moving the piston unit 21.

[0049] The specific working principle of the reversible solenoid valve 100 provided by the present application is as follows. When the reversible solenoid valve 100 needs to be opened, the pilot valve 110 changes direction, causing high-pressure refrigerant to be drawn into the first chamber 131 from the first capillary 141, and the refrigerant in the second chamber 132 to flow out from the second capillary 151, thereby moving the piston unit 21 in a direction away from the first communication port 11 and the second communication port 12, and the piston unit 21 moves the slider unit 23 using the connecting rod 22 and guide frame 235 to release the blockage of the first communication port 11 and the second communication port 12.

[0050] When the reversible solenoid valve 100 needs to be closed, the pilot valve 110 changes direction, causing high-pressure refrigerant to be drawn into the second chamber 132 from the second capillary 151, and the refrigerant in the first chamber 131 to flow out from the first capillary 141, thereby moving the piston unit 21 in a direction approaching the first communication port 11 and the second communication port 12, and the piston unit 21 moves the slider unit 23 using the connecting rod 22 and guide frame 235 so as to block the first communication port 11 and the second communication port 12.

[0051] The present application has verified through experiments that when drive is performed by a single piston unit 21, the minimum operating differential pressure is approximately half that when drive is performed by two associated piston units 1013, and therefore the reversible solenoid valve 100 provided by the present application has significantly improved reliability in operating under low pressure. The present experiment is performed in an atmospheric environment.

[0052] The friction force between the slider unit 23 and the valve seat 16 is F1, the friction force between the sealing ring 312 and the valve core assembly 20 is F2, the friction force between the piston unit 21 and the inner wall of the valve body 10 is F3, the acting force between the medium in the medium chamber 133 and the valve core assembly 20 is F4, the acting force required to close the valve is F5, and the acting force required to open the valve is F6.

[0053] The first communication port 11 and the second communication port 12 are formed in the valve seat 16, and both the first communication port 11 and the second communication port 12 are in contact with air, so F1 and F4 tend to be close to 0, and the force F5 required to close the valve is the product of the pressure of the medium in the second chamber 132 and the contact area between the medium in the second chamber 132 and the piston unit 21, where the contact area between the piston unit 21 and the medium in the second chamber 132 is the area of ​​the side of the piston unit 21 facing the second chamber 132, and the force F6 required to open the valve is the product of the pressure of the medium in the first chamber 131 and the contact area between the medium in the first chamber 131 and the piston unit 21, and it should be noted that the contact area between the piston unit 21 and the medium in the first chamber 131 is the area of ​​the side of the piston unit 21 facing the first chamber 131 minus the cross-sectional area perpendicular to the axial direction of the connecting rod 22.

[0054] Specifically, when the reversible solenoid valve 100 is closed, F5>F1+F2+F3+F4, and according to the above explanation, in this case, F4 is 0, F1 is 0, and F5>F2+F3. When the reversible solenoid valve 100 is open, F4+F6>F1+F2+F3+F5, and according to the above explanation, in this case, F4 is 0, F1 is 0, F5 is 0, and F6>F2+F3.

[0055] The opening differential pressure is mainly caused by resistance. The resistance in the opening process of the reversible solenoid valve 100 provided by this application is mainly F2 and F3, and F2 < F3. Through experiments, the minimum opening differential pressure when using two related piston units 1013 is about 0.11 MPa, and the minimum opening differential pressure of the single piston unit 21 used in the reversible solenoid valve 100 provided by this application is about 0.06 MPa. The result is that the minimum opening differential pressure is half of that when using two piston units 1013. The single piston unit 21 used in the reversible solenoid valve 100 provided by this application has less resistance, requires a smaller minimum opening differential pressure, has a shorter axial length of the valve core assembly 20, and a smaller volume compared with the two related piston units 1013. It can be seen that when installing, it can reduce the volume of the occupied space required, save materials, and reduce costs.

[0056] Embodiment 2 Referring to FIG. 7, the structure of Embodiment 2 has the same operating principle and verification principle of the opening differential pressure as that of the structure of Embodiment 1, and the description of the common points is omitted. The valve body 10 in Embodiment 2 has a different installation method from the structure of Embodiment 1.

[0057] In this embodiment, the valve body 10 is provided separately.

[0058] The valve body 10 in this embodiment includes a valve seat 16 and a sleeve 40. The intermediate end cover 30 is provided between the valve seat 16 and the sleeve 40 and is fixedly connected to each of the valve body 10 and the sleeve 40.

[0059] The first end cover 32 is provided at one end of the valve seat 16 remote from the sleeve 40, or is not provided separately but is provided integrally with the valve seat 16. The connecting rod 22 passes through the intermediate end cover 30, the slider unit 23 is located within the valve seat 16 and can slide within the valve seat 16, and the piston unit 21 is located within the sleeve 40 and abuts against the inner wall of the sleeve 40. The slider unit 23 can be moved by the action of the differential pressure on both sides to connect or block communication between the first communication port 11 and the second communication port 12.

[0060] Example 3 8 and 9, the reversible solenoid valve includes a valve body 10, a valve seat 16, a slider unit 23, and a connecting rod 22. The valve seat 16 is disposed within the valve body 10 and has a valve port. The slider unit 23 is slidably disposed within the valve seat 16 to open and close the valve port. The connecting rod 22 is drivingly connected to the slider unit 23.

[0061] The reversible solenoid valve includes a first sealing seat 50 and a second sealing seat 60, the first sealing seat 50 is provided in the valve body 10 and has a first mounting groove 51, the opening of the first mounting groove 51 faces the opposite side of the valve seat 16 (or may face the opposite side of the slider unit 23), and the second sealing seat 60 is provided in the first mounting groove 51. The reversible solenoid valve 100 includes a first sealing ring 70 and a second sealing ring 80, the first sealing ring 70 being disposed in the first sealing seat 50, the second sealing ring 80 being disposed in the second sealing seat 60, and the connecting rod 22 passing through the first sealing ring 70 and the second sealing ring 80.

[0062] In this embodiment, the first sealing seat 50 and the second sealing seat 60 are provided, and the second sealing seat 60 is provided in the first mounting groove 51. During assembly, the first sealing ring 70 is first inserted into the first sealing seat 50, then the second sealing ring 80 is inserted into the second sealing seat 60, and finally the second sealing ring 80 together with the second sealing seat 60 is inserted into the first mounting groove 51. The above assembly method makes it easier and faster to assemble the first sealing ring 70 and the second sealing ring 80 into the first sealing seat 50 and the second sealing seat 60, respectively, and effectively solves the problem of difficulty in assembling the sealing rings into the sealing seats.

[0063] The intermediate end cover 30 of the reversible solenoid valve in Example 1 may also include the first sealing seat 50 and the second sealing seat 60 in Example 3, and the following descriptions regarding the first sealing seat 50 and the second sealing seat 60 can all be applied to Example 1.

[0064] The first sealing seat 50 further has a first through hole 52 and a first sealing groove 53, the first through hole 52, the first sealing groove 53 and the first mounting groove 51 are connected in sequence, the diameters of the first through hole 52, the first sealing groove 53 and the first mounting groove 51 increase in sequence, the first sealing ring 70 is disposed in the first sealing groove 53, the second sealing seat 60 has a second through hole 61, the inner wall of the second through hole 61 has a second sealing groove 611, the diameter of the second through hole 61 is smaller than the diameter of the first sealing groove 53, and the second sealing ring 80 is disposed in the second sealing groove 611. The first through-hole 52, the first sealing groove 53 and the first mounting groove 51 are connected in sequence to allow the connecting rod 22 to pass through easily. The first sealing groove 53 facilitates the placement of the first sealing ring 70. The second through-hole 61 has a diameter smaller than that of the first sealing groove 53, which not only ensures the smooth passage of the connecting rod 22 but also acts as a restriction for the first sealing ring 70, preventing the first sealing ring 70 from entering the second through-hole 61. The second sealing groove 611 is provided for the placement of the second sealing ring 80.

[0065] Furthermore, the axial dimension of the first sealing groove 53 is larger than the axial dimension of the first sealing ring 70, the first through hole 52 and the second through hole 61 have the same diameter, and the first sealing ring 70 and the second sealing ring 80 have the same dimensions. By making the axial dimension of the first sealing groove 53 larger than the axial dimension of the first sealing ring 70, the first sealing ring 70 can move within the first sealing groove 53, and the pressure at one end of the first sealing seat 50 facing the valve seat 16 is greater than the pressure at the other end, generating a thrust force away from one end of the valve seat 16, which causes the first sealing ring 70 to move toward the second sealing seat 60. This not only ensures sealing performance, but also reduces the working surface of the second sealing seat 60 that receives the thrust, preventing the second sealing seat 60 from separating from the first sealing seat 50 due to the large thrust. Furthermore, it improves the stability of the second sealing seat 60 during operation.

[0066] 10, the first mounting groove 51 has an annular flange 511 around its opening, and the second sealing seat 60 is pressed into the first mounting groove 51 through the opening, with the annular flange 511 crimped to the second sealing seat. The annular flange 511 around the opening of the first mounting groove 51 facilitates crimping to the second sealing seat 60, and the crimping connection method provides a more stable and reliable connection. The annular flange 511 is part of the first sealing seat 50.

[0067] 10 and 11, before the annular flange 511 is crimped, the depth of the first mounting groove 51 is L1, the outer wall of the second sealing seat 60 is cylindrical, and the axial length of the second sealing seat 60 is L2, where L1 and L2 satisfy the relationship: L1 > L2, and the annular flange 511 is crimped to the end surface of the second sealing seat 60. By limiting the magnitudes of the depth L1 of the first mounting groove 51 and the axial length L2 of the second sealing seat 60 within the above ranges, it is possible to ensure that the annular flange 511 is smoothly crimped to the end surface of the second sealing seat 60.

[0068] The inner wall of the first mounting groove 51 and the outer wall of the second sealing seat 60 can be connected by threads to facilitate attachment and detachment. The inner wall of the first mounting groove 51 and the outer wall of the second sealing seat 60 can also be laser welded. By using laser welding, the stability and reliability of the connection between the inner wall of the first mounting groove 51 and the outer wall of the second sealing seat 60 can be improved.

[0069] 12 , the bottom wall of the first mounting groove 51 has a third sealing groove 512, which is disposed around the first sealing ring 70. The reversible solenoid valve 100 further includes a third sealing ring 90, which is disposed in the third sealing groove 512 and abuts against the end face of the second sealing seat 60. The provision of the third sealing groove 512 on the bottom wall of the first mounting groove 51 and the abutment of the third sealing ring 90 against the end face of the second sealing seat 60 improves the sealing effect between the first sealing seat 50 and the second sealing seat 60 and reduces the thrust force exerted on the second sealing seat 60 due to high pressure, thereby improving the stability of the second sealing seat 60 during operation and preventing the first sealing ring 70 from failing and affecting the sealing effect between the first sealing seat 50 and the second sealing seat 60.

[0070] Furthermore, in the above embodiment, the outer wall of the first sealing seat 50 has a welding groove 54, and the outer wall of the first sealing seat 50 is welded to the inner wall of the valve body 10. By providing the welding groove 54 on the outer wall of the first sealing seat 50, welding to the inner wall of the valve body 10 becomes easier.

[0071] Referring to FIG. 13, the present application further provides an air conditioning unit 200 including the above-mentioned reversible solenoid valve 100.

[0072] The technical features of the above-described embodiments can be combined in any desired manner. For the sake of brevity, not all possible combinations of the technical features in the above-described embodiments have been described. However, as long as there is no contradiction in the combination of these technical features, any combination should be considered within the scope described in this specification.

[0073] The above examples merely illustrate some embodiments of the present application, and although the descriptions are relatively specific and detailed, they should not be understood as limiting the scope of the patent claims of the present application. It should be noted that those skilled in the art may make some modifications and improvements without departing from the spirit of the present application, and all of them will fall within the scope of protection of the present application. Therefore, the scope of protection of the patent of the present application shall be determined according to the scope of the attached claims.

Claims

1. a valve body and a valve core assembly, wherein a first communication port and a second communication port are respectively formed on both sides of the valve body, the valve body has a valve chamber, and the valve core assembly is disposed within the valve chamber and is slidable within the valve chamber so as to establish or block communication between the first communication port and the second communication port; the valve core assembly includes a piston unit, a connecting rod, and a slider unit, the slider unit and the piston unit being connected to both ends of the connecting rod, respectively, the slider unit being provided adjacent to the first communication port and the second communication port, the first communication port and the second communication port being provided opposite to each other, the slider unit being capable of simultaneously closing the first communication port and the second communication port, and being capable of generating a pressure difference on both sides of the piston unit to move the piston unit and slide it within the valve chamber, the valve chamber includes an intermediate end cover and a second end cover, the intermediate end cover is fixed within the valve chamber, the piston unit is provided on a side of the intermediate end cover away from the first communication port and the second communication port, the intermediate end cover and the piston unit form a first chamber, and the piston unit and the second end cover form a second chamber; a first protrusion is provided on a side surface of the piston unit facing the intermediate end cover, the first protrusion being annular, and a first opening is formed in a side surface of the first protrusion, so that the medium can flow out from a groove formed by the first protrusion through the first opening; and / or a second protrusion is provided on a side surface of the piston unit facing the second end cover, the second protrusion being annular, and a second opening is formed in a side surface of the second protrusion, so that the medium can flow out from the groove formed by the second protrusion through the second opening.

2. 2. The reversible solenoid valve according to claim 1, further comprising a pilot valve, the pilot valve being provided in the valve body, the valve body having a first hole and a second hole formed therein, the first hole communicating with the first chamber and the second hole communicating with the second chamber, the pilot valve communicating with each of the first hole and the second hole via a capillary tube, and the pilot valve controlling a differential pressure between the first chamber and the second chamber.

3. 2. The reversible solenoid valve according to claim 1, further comprising a first end cover, the first end cover being provided at one end of the valve body remote from the second end cover, the first end cover forming a medium chamber together with the intermediate end cover, the slider unit being a reversible solenoid valve provided in the medium chamber, and when the reversible solenoid valve is in a first position, the first communication port and the second communication port each communicate with the medium chamber.

4. 2. The reversible solenoid valve according to claim 1, wherein when the piston unit moves in a direction approaching the first communication port and the second communication port, the first protrusion can abut against the intermediate end cover, and / or when the piston unit moves in a direction approaching the second end cover, the second protrusion can abut against the second end cover.

5. the first opening is a first orifice; 2. The reversible solenoid valve according to claim 1, wherein the second opening is a second orifice.

6. the first opening is a first throttle groove formed in an end surface of the first projection facing the intermediate end cover, 2. The reversible electromagnetic valve according to claim 1, wherein the second opening is a second throttle groove formed in an end surface of the second projection facing the second end cover.

7. 2. The reversible solenoid valve according to claim 1, wherein the slider unit includes a first part and a second part arranged opposite to each other, the first part being capable of closing the first communication port, the second part being capable of closing the second communication port, a housing chamber being provided between the first part and the second part, an elastic member being provided in the housing chamber, and both ends of the elastic member being in contact with the first part and the second part, respectively.

8. 8. The reversible solenoid valve according to claim 7, wherein the valve chamber includes a medium chamber, the slider unit is provided in the medium chamber, a balancing hole is formed in the first part and / or the second part, and the medium chamber is communicated with the accommodating chamber via the balancing hole.

9. The reversible solenoid valve according to claim 7 , wherein the slider unit further includes a guide frame, the guide frame being fitted to the outside of the first part and the second part and connected to the connecting rod.

10. a reversible solenoid valve, wherein the intermediate end cover includes a first sealing seat and a second sealing seat, the first sealing seat is provided in the valve body and has a first mounting groove, an opening of the mounting groove faces away from the slider unit, and the second sealing seat is provided in the first mounting groove; 2. The reversible solenoid valve according to claim 1, further comprising a first sealing ring and a second sealing ring, wherein the first sealing ring is disposed in the first sealing seat, the second sealing ring is disposed in the second sealing seat, and the connecting rod passes through the first sealing ring and the second sealing ring.

11. the first sealing seat further has a first through hole and a first sealing groove, the first through hole, the first sealing groove and the first mounting groove are sequentially connected to each other, the diameters of the first through hole, the first sealing groove and the first mounting groove are sequentially increased, and the first sealing ring is disposed in the first sealing groove; 11. The reversible solenoid valve according to claim 10, wherein the second sealing seat has a second through hole, a second sealing groove is formed on an inner wall of the second through hole, a diameter of the second through hole is smaller than a diameter of the first sealing groove, and the second sealing ring is disposed in the second sealing groove.

12. 12. The reversible solenoid valve according to claim 11, wherein the axial dimension of the first sealing groove is larger than the axial dimension of the first sealing ring, the first through hole and the second through hole have the same diameter, and the first sealing ring and the second sealing ring have the same size.

13. The reversible solenoid valve according to claim 10, wherein an inner wall of the first mounting groove is threadably connected to an outer wall of the second sealing seat.

14. 11. The reversible solenoid valve according to claim 10, wherein a third sealing groove is formed in a bottom wall of the first mounting groove, and the third sealing groove is disposed around the first sealing ring, and the reversible solenoid valve further comprises a third sealing ring, the third sealing ring being disposed in the third sealing groove and abutting against an end surface of the second sealing seat.

15. The reversible solenoid valve according to claim 10, wherein the outer wall of the first sealing seat has a welding groove.

16. a valve body, a valve seat, a slider unit, and a connecting rod; the valve seat is provided within the valve body and has a valve port, the slider unit is slidably provided within the valve seat to open and close the valve port, and the connecting rod is drivingly connected to the slider unit; the valve disc includes an intermediate end cover and a second end cover, the intermediate end cover being fixed within a valve chamber of the valve disc, a piston unit connected to an end of the connecting rod opposite to the end to which the slider unit is connected, the piston unit being provided on a side of the intermediate end cover away from a first communication port and a second communication port respectively formed on both sides of the valve disc, the intermediate end cover forming a first chamber together with the piston unit, and the piston unit forming a second chamber together with the second end cover, a first protrusion is provided on a side surface of the piston unit facing the intermediate end cover, the first protrusion being annular, and a first opening is formed in the side surface of the first protrusion, so that the medium can flow out from the groove formed by the first protrusion through the first opening; and / or a second protrusion is provided on a side surface of the piston unit facing the second end cover, the second protrusion being annular, and a second opening is formed in the side surface of the second protrusion, so that the medium can flow out from the groove formed by the second protrusion through the second opening; the intermediate end cover includes a first sealing seat and a second sealing seat, the first sealing seat is disposed within the valve body and has a first mounting groove, an opening of the first mounting groove faces away from the valve seat, and the second sealing seat is disposed within the first mounting groove; a first sealing ring disposed in the first sealing seat and a second sealing ring disposed in the second sealing seat, and the connecting rod passes through the first sealing ring and the second sealing ring.

17. the first sealing seat further has a first through hole and a first sealing groove, the first through hole, the first sealing groove and the first mounting groove are sequentially connected to each other, the diameters of the first through hole, the first sealing groove and the first mounting groove are sequentially increased, and the first sealing ring is disposed in the first sealing groove; 17. The reversible solenoid valve according to claim 16, wherein the second sealing seat has a second through hole, and a second sealing groove is formed on the inner wall of the second through hole, the diameter of the second through hole is smaller than the diameter of the first sealing groove, and the second sealing ring is disposed in the second sealing groove.

18. 18. The reversible solenoid valve according to claim 17, wherein the axial dimension of the first sealing groove is larger than the axial dimension of the first sealing ring, the first through hole and the second through hole have the same diameter, and the first sealing ring and the second sealing ring have the same size.

19. 17. The reversible solenoid valve according to claim 16, wherein an inner wall of the first mounting groove is threadably connected to an outer wall of the second sealing seat.

20. 17. The reversible solenoid valve according to claim 16, wherein a third sealing groove is formed in a bottom wall of the first mounting groove, and the third sealing groove is arranged around the first sealing ring, and the reversible solenoid valve further includes a third sealing ring, the third sealing ring being arranged in the third sealing groove and abutting against an end surface of the second sealing seat.

21. 17. The reversible solenoid valve according to claim 16, wherein the outer wall of the first sealing seat has a weld groove.

22. An air conditioning unit comprising a reversible solenoid valve according to any one of claims 1 to 21.

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