Assembly Method of Reversible Solenoid Valve

Abstract

The present invention relates to the field of refrigeration technology, particularly to an assembly method of a reversible solenoid valve. An assembly method of a reversible solenoid valve, the reversible solenoid valve comprising a valve body, an intermediate end cover, a spool assembly, a valve seat and an end cover, the valve body having a valve cavity with openings at both ends; the assembly method of the reversible solenoid valve includes: inserting the intermediate end cover into the valve cavity from the opening and fixedly connecting it to the valve body; inserting the valve seat into the valve cavity and fixing it to the inner wall of the valve body; inserting the spool assembly into the valve cavity and making the spool assembly slidably connected to the valve seat; covering the end cover on both ends of the valve body and sealing the opening. By fixedly connecting the intermediate end cover to the valve body, the present invention can not only strengthen the firmness of the intermediate end cover, but also separate the chambers, enabling one piston component to be omitted and simplifying the installation steps.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigeration, and particularly to an assembly method of a reversible solenoid valve. Background Art

[0002] A reversible solenoid valve is usually installed in an air-conditioning unit to achieve bidirectional flow of a medium.

[0003] For the existing reversible solenoid valve, the valve cavity is separated by the cooperation between a spool assembly and the inner wall of the valve cavity. Therefore, at least two piston components are required to separate the valve cavity, and both piston components are movable and need to slide sealingly in the inner wall of the valve cavity, resulting in a complex structure. Thus, the assembly method is also relatively cumbersome, affecting the assembly efficiency. Summary of the Invention

[0004] Based on this, in view of the above technical problems, the present invention provides a reversing valve, and the technical solution is as follows:

[0005] An assembly method of a reversible solenoid valve, the reversible solenoid valve includes a valve body, an intermediate end cover, a spool assembly, a valve seat and an end cover, and the valve body has a valve cavity with openings at both ends; the assembly method of the reversible solenoid valve includes:

[0006] Insert the intermediate end cover into the valve cavity from the opening and fixedly connect it with the valve body;

[0007] Insert the valve seat into the valve cavity and fix it to the inner wall of the valve body;

[0008] Insert the spool assembly into the valve cavity and make the spool assembly slidably connected with the valve seat;

[0009] Cover the end cover on both ends of the valve body and seal the openings.

[0010] With such a setting, by fixedly connecting the intermediate end cover with the valve body, the present invention can not only strengthen the firmness of the intermediate end cover, but also separate the chambers, and can reduce the number of piston components, simplifying the installation steps.

[0011] In one embodiment, the valve body is provided with a first communication port and a second communication port. In the step of inserting the intermediate end cover into the valve cavity from the opening:

[0012] The intermediate end cover is inserted into the valve cavity from the opening at one end of the valve body close to the first communication port and the second communication port.

[0013] With such a setting, it can avoid scratching the inner wall of the valve cavity on the other side, and enable the piston component to slide sealingly in the valve cavity smoothly.

[0014] In one embodiment, the valve core assembly includes a connecting rod, a piston component, and a slider component. The intermediate end cover is provided with a mounting hole. The steps of installing the valve core assembly into the valve cavity include:

[0015] Connect the slider component to one end of the connecting rod;

[0016] Insert the connecting rod and the slider component into the valve cavity through the opening at one end of the valve body near the first communication port and the second communication port. Insert the connecting rod into the mounting hole and push the slider component into the valve seat;

[0017] Connect the piston component to the end of the connecting rod away from the slider component.

[0018] With this arrangement, since there is only one piston component in the present invention, the assembly steps can be simplified.

[0019] In one embodiment, the slider component includes a guide frame, a first slider, and a second slider. The guide frame is provided with a through hole. Both the first slider and the second slider include a first section and a second section. The assembly method of the slider component includes:

[0020] Place the first section of the first slider outside the through hole and insert the second section of the first slider into the through hole;

[0021] Place the first section of the second slider on the side of the through hole away from the first section of the first slider and insert the second section of the second slider into the second section of the first slider;

[0022] Connect the guide frame to the connecting rod.

[0023] With this arrangement, the movement of the slider component can be guided and the slider component can be prevented from rotating under the impact of the medium.

[0024] In one embodiment, the piston component includes an intermediate baffle, a first part, and a second part. The assembly method of the piston component includes:

[0025] Place the first part and the second part on both sides of the intermediate baffle respectively and fixedly connect them.

[0026] With this arrangement, it plays a role in supporting and strengthening the first part and the second part.

[0027] In one embodiment, the first part includes a first baffle and a first piston bowl in a bowl shape, and the second part includes a second baffle and a second piston bowl in a bowl shape. The steps before fixedly connecting the first part, the intermediate baffle, and the second part further include:

[0028] Place the first piston bowl and the second piston bowl on both sides of the intermediate baffle plate back to back;

[0029] Set the first baffle plate inside the first piston bowl and set the second baffle plate inside the second piston bowl.

[0030] With such a setting, the piston component can move in the valve cavity in a sealed manner to hermetically isolate the chambers on both sides of the piston component, so that a pressure difference can be formed between the two chambers.

[0031] In one embodiment, the intermediate end cover and the valve body are fixedly connected by welding.

[0032] With such a setting, the firmness of the installation of the intermediate end cover can be enhanced.

[0033] In one embodiment, a solder groove is provided on the outer side wall of the intermediate end cover. Before welding the intermediate end cover to the valve body, solder or a solder ring is placed in the solder groove.

[0034] With such a setting, it is convenient for welding the intermediate end cover.

[0035] In one embodiment, the reversible solenoid valve further includes a pilot valve. The steps between installing the valve seat into the valve cavity and installing the valve core assembly into the valve cavity further include:

[0036] Fix the pilot valve to the valve body.

[0037] With such a setting, since the pilot valve is welded to the valve body, fixing the pilot valve first can protect components such as the sealing ring inside the valve core assembly from the influence of welding high temperature.

[0038] In one embodiment, the intermediate end cover includes a guide sleeve and a cover body. A sealing groove is provided inside the guide sleeve. The steps of fixedly connecting the intermediate end cover to the valve body include:

[0039] Weld the cover body to the inner wall of the valve body;

[0040] Set a sealing ring in the sealing groove;

[0041] Insert the guide sleeve into the valve cavity and fixedly connect it to the cover body.

[0042] With such a setting, first weld the cover body, and then connect the guide sleeve to the cover body, so that components such as the sealing ring can be assembled with the guide sleeve outside the valve body and then connected to the cover body, which is convenient for the installation of the sealing ring and also protects the sealing ring from the influence of welding high temperature.

[0043] Compared with the prior art, the reversible solenoid valve provided by the present invention can partition the chamber by using the middle end cover fixed in the valve body, and can reduce the number of piston components, thus simplifying the installation steps. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 is a cross-sectional view of the reversible solenoid valve provided by the present invention;

[0045] Figure 2 is Figure 1 a partial enlarged view of part A in

[0046] Figure 3 is a cross-sectional view of the reversible solenoid valve after installing the connecting rod component;

[0047] Figure 4 is a schematic structural view of the reversible solenoid valve without installing the pilot valve and the end cover;

[0048] Figure 5 is an overall three-dimensional view of the reversible solenoid valve;

[0049] Figure 6 is a cross-sectional view of the middle end cover;

[0050] Figure 7 is a schematic structural view of the connecting rod and the guide frame;

[0051] Figure 8 is a process diagram of assembling the reversible solenoid valve.

[0052] The meanings of the symbols in the drawings are as follows:

[0053] 100, reversible solenoid valve; 10, valve body; 101, first hole; 102, second hole; 103, first capillary; 104, second capillary; 11, valve chamber; 110, opening; 111, first chamber; 112, second chamber; 113, third chamber; 12, first communication port; 121, first connecting pipe; 13, second communication port; 131, second connecting pipe; 140, end cover; 14, first end cover; 15, second end cover; 16, middle end cover; 161, mounting hole; 162, sealing groove; 163, sealing ring; 164, cover body; 165, guide sleeve; 166, solder groove; 17, valve seat; 20, valve core assembly; 21, connecting rod; 22, piston component; 221, middle baffle; 222, first part; <2221, first baffle; 2222, first piston bowl; 223, second part; 2231, second baffle; 2232, second piston bowl; 23, slider component; 231, first slider; 2311, first section; 2312, second section; 232, second slider; 233, guide frame; 2331, through hole; 30, pilot valve; 31, third capillary; 32, fourth capillary. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0054] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part rather than all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0055] It should be noted that when a component is referred to as being "installed on" another component, it can be directly on the other component or there may also be an intermediate component. When a component is considered to be "arranged on" another component, it can be directly arranged on the other component or there may be an intermediate component at the same time. When a component is considered to be "fixed to" another component, it can be directly fixed to the other component or there may be an intermediate component at the same time.

[0056] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used in the description of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "or / and" used herein includes any and all combinations of one or more of the related listed items.

[0057] Please refer to Figures 1 to 8 , the present invention provides an assembly method for a reversible solenoid valve 100, which is used to assemble a reversible solenoid valve 100.

[0058] The reversible solenoid valve 100 (hereinafter referred to as the solenoid valve) is installed in an air-conditioning unit and is used to control the connection or disconnection of a pipeline. The reversible solenoid valve 100 can be used in an air-conditioning unit that needs to work bidirectionally. For example, it can be installed in an air-conditioning unit that needs to have both a refrigeration mode and a heating mode at the same time to achieve the bidirectional flow of the medium without switching the pipeline.

[0059] Please refer to Figure 1 , the solenoid valve includes a valve body 10, an intermediate end cover 16 and a spool assembly 20. The valve body 10 has a valve chamber 11. The valve body 10 is provided with a first communication port 12 and a second communication port 13 which are oppositely arranged. The intermediate end cover 16 is arranged in the valve chamber 11. The spool assembly 20 is arranged in the valve chamber 11 and can slide in the valve chamber 11 to connect or disconnect the first communication port 12 and the second communication port 13.

[0060] Specifically, a first connecting pipe 121 is arranged in the first communication port 12, a second connecting pipe 131 is arranged in the second communication port 13, and the first connecting pipe 121 and the second connecting pipe 131 are respectively connected to the pipelines of the air-conditioning unit.

[0061] The two ends of the valve body 10 are provided with openings 110. End caps 140 are provided at both ends of the valve body 10. The end cap 140 includes a first end cap 14 and a second end cap 15. The first end cap 14 is provided at one end of the valve body 10 close to the first communication port 12 and the second communication port 13, and the second end cap 15 is provided at the other end of the valve body 10.

[0062] A valve seat 17 is provided in the valve cavity 11. The valve seat 17 is fixed within the valve body 10. The first communication port 12 and the second communication port 13 penetrate through the valve seat 17. A part of the valve core assembly 20 is disposed within the valve seat 17 and slides within the valve seat 17.

[0063] The valve cavity 11 includes a first cavity 111, a second cavity 112, and a third cavity 113. The first end cap 14, the valve body 10, and the valve core assembly 20 cooperate to form the first cavity 111. The valve core assembly 20, the intermediate end cap 16, and the valve body 10 form the second cavity 112. The valve core assembly 20, the valve body 10, and the second end cap 15 form the third cavity 113. The first communication port 12 and the second communication port 13 respectively extend into the first cavity 111. When the reversible solenoid valve 100 is in the first position, the first communication port 12 and the second communication port 13 communicate with the first cavity 111 for the flow of the medium.

[0064] The valve body 10 is provided with a first hole 101 and a second hole 102. The first hole 101 is in body communication with the second cavity 112, and the second hole 102 communicates with the third cavity 113. A first capillary tube 103 is provided within the first hole 101, and a second capillary tube 104 is provided within the second hole 102. The first capillary tube 103 and the second capillary tube 104 are connected to the following pilot valve 30 to form a pressure difference on both sides of the valve core assembly 20 and push the valve core assembly 20 to move.

[0065] Please refer to Figure 6 , an installation hole 161 is provided on the intermediate end cap 16. A part of the valve core assembly 20 passes through the installation hole 161, a part is disposed on one side of the intermediate end cap 16 close to the first communication port 12 and the second communication port 13, and another part is disposed on the side of the intermediate end cap 16 away from the first communication port 12 and the second communication port 13.

[0066] A solder groove 166 is provided on the outer side wall of the intermediate end cap 16. When welding the intermediate end cap 16 to the inner wall of the valve body 10, a welding ring or solder will be placed in the solder groove 166.

[0067] A sealing groove 162 is provided on the inner wall of the installation hole 161. A sealing ring 163 is provided within the sealing groove 162. The sealing ring 163 abuts against that part of the valve core assembly 20 passing through the installation hole 161 to enable the valve core assembly 20 to pass through the installation hole 161 in a sealed manner.

[0068] The middle end cover 16 includes a cover body 164 and a guide sleeve 165. The mounting hole 161 is formed in the guide sleeve 165. The cover body 164 is sleeved outside the guide sleeve 165 and is fixedly welded to the inner wall of the valve body 10. The cover body 164 and the guide sleeve 165 are fixedly connected. The cover body 164 and the guide sleeve 165 can be connected by rivets or screws.

[0069] Please continue to refer to Figure 1 , the valve core assembly 20 includes a connecting rod 21 and a piston component 22. The connecting rod 21 passes through the mounting hole 161. The piston component 22 is arranged in the valve cavity 11. The piston component 22 can move sealingly along the inner wall of the valve body 10. The piston component 22 is located between the second cavity 112 and the third cavity 113. That is, the piston component 22 separates the second cavity 112 and the third cavity 113 to prevent the medium from flowing through. When the solenoid valve needs to be closed, the high-pressure medium enters the third cavity 113 from the second capillary 104, and the medium in the second cavity 112 flows out from the first capillary 103, so as to push the piston component 22 to move towards the direction close to the valve seat 17. When the solenoid valve needs to be opened, the high-pressure medium enters the second cavity 112 from the first capillary 103, and the medium in the third cavity 113 flows out from the second capillary 104, so as to push the piston to move away from the valve seat 17.

[0070] The piston component 22 includes an intermediate baffle 221, a first part 222 and a second part 223. The intermediate baffle 221, the first part 222 and the second part 223 are connected to each other. The first part 222 faces the first end cover 14, and the second part 223 faces the second end cover 15.

[0071] The first part 222 includes a first baffle 2221 and a first piston bowl 2222 in a bowl shape. The second part 223 includes a second baffle 2231 and a second piston bowl 2232 in a bowl shape. The first baffle 2221 is arranged in the first piston bowl 2222, the second baffle 2231 is arranged in the second piston bowl 2232. The first piston bowl 2222 and the second piston bowl 2232 are respectively arranged on both sides of the intermediate baffle 221. The first baffle 2221, the first piston bowl 2222, the intermediate baffle 221, the second piston bowl 2232, and the second baffle 2231 are connected in sequence. The first piston bowl 2222 and the second piston bowl 2232 are arranged back to back, and the outer side walls of the first piston bowl 2222 and the second piston bowl 2232 are fitted with the inner wall of the valve body 10, so that the piston component 22 moves sealingly in the valve body 10 to seal off the second cavity 112 and the third cavity 113.

[0072] The valve core assembly 20 further includes a slider component 23. The slider component 23 is connected to the end of the connecting rod 21 far from the piston component 22. The slider component 23 can block or unblock the first communication port 12 and the second communication port 13 as the piston component 22 moves.

[0073] Please refer to Figure 7 As shown in Figure 7 , the slider component 23 includes a first slider 231, a second slider 232 and a guide frame 233. The guide frame 233 is provided with a through hole 2331. A part of the first slider 231 and the second slider 232 are both arranged in the through hole 2331. The guide frame 233 is used for the installation and limitation of the first slider 231 and the second slider 232, and the guide frame 233 is connected to the connecting rod 21.

[0074] Both the first slider 231 and the second slider 232 include a first section 2311 and a second section 2312. The first section 2311 of the first slider 231 is arranged close to the first communication port 12, and the first section 2311 of the second slider 232 is arranged close to the second communication port 13. The outer diameter of the first section 2311 is larger than that of the second section 2312, and the outer diameter of the second section 2312 of the first slider 231 is smaller than the outer diameter of the second section 2312 of the second slider 232. The second section 2312 of the first slider 231 is sleeved on the outside of the second section 2312 of the second slider 232. The guide frame 233 is arranged on the outside of the second section 2312.

[0075] Please refer to Figure 4 and Figure 5 As shown in Figure 4 and Figure 5 , the solenoid valve further includes a pilot valve 30. The pilot valve 30 is arranged outside the valve body 10 and is connected to the first capillary 103 and the second capillary 104. By reversing the pilot valve 30, the pressure difference on both sides of the piston component 22 is controlled, thereby pushing the piston component 22.

[0076] The pilot valve 30 is provided with a third capillary 31 and a fourth capillary 32. One end of the third capillary 31 is connected to the pilot valve 30, and the other end is connected to the high-pressure pipeline of the air-conditioning unit. One end of the fourth capillary 32 is connected to the pilot valve 30, and the other end is connected to the low-pressure pipeline of the air-conditioning unit.

[0077] Please refer to Figure 8 As shown in Figure 8 , the assembling method of the reversible solenoid valve 100 includes:

[0078] S1 Install the middle end cover 16 into the valve cavity 11 from the opening 110 of the valve body 10 and fixedly connect it to the valve body 10;

[0079] S2 Install the valve seat 17 into the valve cavity 11 and fix it to the inner wall of the valve body 10;

[0080] S3 Install the valve core assembly 20 into the valve cavity 11 and make the valve core assembly 20 slidably connected to the valve seat 17;

[0081] S4 Cover the first end cover 14 and the second end cover 15 on both ends of the valve body 10 respectively to seal the opening 110.

[0082] In the present invention, by fixing the intermediate end cap 16 inside the valve body 10 and using the intermediate end cap 16 to separate the chambers, one piston component 22 can be set less, reducing the assembly steps.

[0083] In step S1, by loading the intermediate end cap 16 from the opening 110 at one end close to the first communication port 12 and the second communication port 13, the inner wall of the valve body 10 near the second end cap 15 can be protected from being scratched, so that the piston component 22 can slide smoothly and sealingly on that part of the inner wall of the valve body 10.

[0084] In step S1, the intermediate end cap 16 is fixed in the valve chamber 11 by welding, which can strengthen the firmness of the intermediate end cap 16.

[0085] The steps before step S1 further include:

[0086] S11 Weld the cover body 164 in the valve chamber 11;

[0087] S12 Set the sealing ring 163 in the sealing groove 162;

[0088] S13 Insert the guide sleeve 165 equipped with the sealing ring 163 into the valve chamber 11 and install it in the cover body 164;

[0089] S14 Fix the guide sleeve 165 and the cover body 164 in a connected manner.

[0090] It can be understood that by first welding the cover body 164 and then fixedly connecting the guide sleeve 165 equipped with the sealing ring 163 and the cover body 164, parts that are not resistant to high temperature such as the sealing ring 163 can be protected from the influence of the high-temperature heat of welding.

[0091] In S14, the guide sleeve 165 and the cover body 164 are fixedly connected by rivets or screws, so as to protect the sealing ring 163 when the guide sleeve 165 and the cover body 164 are fixed.

[0092] In S2, the valve seat 17 is fixed in the valve body 10 by welding.

[0093] Step S3 includes:

[0094] S31 Connect the slider component 23 and the connecting rod 21;

[0095] S32 Insert the connecting rod 21 and the slider component 23 into the valve chamber 11 from the opening 110 of the valve body 10 close to the first communication port 12 and the second communication port 13, insert the connecting rod 21 into the mounting hole 161, and push the slider component 23 into the valve seat 17;

[0096] S33 Insert the piston component 22 into the valve chamber 11 from the opening 110 at the end of the valve body 10 far from the first communication port 12 and the second communication port 13, and connect it to the connecting rod 21.

[0097] In step S31, the slider component 23 and the connecting rod 21 are fixedly connected by rivets, screws, etc.

[0098] In step S31, the assembly method of the slider component 23 includes:

[0099] S311 Place the first section 2311 of the first slider 231 outside the through hole 2331, and extend the second section 2312 of the first slider 231 into the through hole 2331;

[0100] S312 Place the first section 2311 of the second slider 232 on the side of the through hole 2331 away from the first section 2311 of the first slider 231, and extend the second section 2312 of the second slider into the second section 2312 of the first slider 231;

[0101] S313 Connect the guide frame 233 and the connecting rod 21.

[0102] In step S33, the installation method of the piston component 22 includes:

[0103] S331 Place the first part 222 and the second part 223 on both sides of the middle baffle 221 and make a fixed connection.

[0104] Step S331 includes:

[0105] S3311 Place the first piston bowl 2222 and the second piston bowl 2232 on both sides of the middle baffle 221 back to back;

[0106] S3312 Place the first baffle 2221 in the first piston bowl 2222 and place the second baffle 2231 in the second piston bowl 2232.

[0107] Before step S3 and after step S2, the steps further include:

[0108] S5 Fix the pilot valve 30 on the valve body 10.

[0109] In S5, the pilot valve 30 is fixed on the valve body 10 by welding.

[0110] Since the first piston bowl 2222, the second piston bowl 2232 and the slider in the spool assembly 20 are made of plastic material, the step of welding the pilot valve 30 is placed before installing the spool assembly 20 to protect the spool assembly 20 from the high-temperature environment of welding.

[0111] Before step S3 and after step S5, the steps further include:

[0112] S6 welds one end of the first capillary tube 103 and the second capillary tube 104 to the pilot valve 30, and the other end to the valve body 10, and welds one end of the third capillary tube 31 and the fourth capillary tube 32 to the pilot valve 30.

[0113] During the assembly process, first insert the intermediate end cover 16 into the valve cavity 11 from the opening 110 near the first communication port 12 and fix it inside the valve body 10, and fix the valve seat 17 inside the valve body 10. Then connect the assembled slider component 23 to the connecting rod 21, and then install it into the valve cavity 11. The connecting rod 21 passes through the mounting hole 161 and extends between the intermediate end cover 16 and the second end cover 15 end cover 140, and connect the piston component 22 to one end of the connecting rod 21 far from the slider component 23. Further, fix the pilot valve 30 to the valve body 10, and then set the first end cover 14 and the second end cover 15 at both ends of the valve body 10 to block the opening 110.

[0114] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0115] The above-described embodiments only represent several implementation manners of the present invention, and the description thereof is relatively specific and detailed, but it should not be understood as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the appended claims.

Claims

1. A method for assembling a reversible solenoid valve, the reversible solenoid valve comprising a valve body (10), an intermediate end cover (16), a valve core assembly (20), a valve seat (17), and an end cover (140), wherein the valve body (10) has a valve cavity (11) with openings (110) at both ends; characterized in that: The assembly method of the reversible solenoid valve comprises: The intermediate end cover (16) is installed into the valve cavity (11) through the opening (110) and fixedly connected to the valve body (10); The valve seat (17) is installed in the valve cavity (11) and fixed to the inner wall of the valve body (10); The valve core assembly (20) is installed in the valve cavity (11), and the valve core assembly (20) is slidably connected to the valve seat (17); Covering the two ends of the valve body (10) with the end covers (140) and sealing the opening (110); The valve body (10) is provided with a first communication opening (12) and a second communication opening (13). In the step of inserting the intermediate end cover (16) into the valve cavity (11) through the opening (110): The intermediate end cover (16) is installed into the valve cavity (11) from the opening (110) at one end of the valve body (10) close to the first communication port (12) and the second communication port (13); The valve core assembly (20) includes a piston component (22), and the steps of installing the valve core assembly (20) into the valve cavity (11) include: The piston component (22) is extended into the valve cavity (11) from an opening (110) at one end of the valve body (10) away from the first communication port (12) and the second communication port (13).

2. The assembly method of a reversible solenoid valve according to claim 1, characterized in that: The valve core assembly (20) further comprises a connecting rod (21) and a slider component (23). The intermediate end cover (16) is provided with a mounting hole (161). The steps of installing the valve core assembly (20) into the valve cavity (11) include: Connecting the slider component (23) to one end of the connecting rod (21); Install the connecting rod (21) and the slider component (23) into the valve cavity (11) from the opening (110) at one end of the valve body (10) close to the first communication port (12) and the second communication port (13), extend the connecting rod (21) into the mounting hole (161) and push the slider component (23) into the valve seat (17); The piston component (22) is connected to an end of the connecting rod (21) away from the slider component (23).

3. The assembly method of a reversible solenoid valve according to claim 2, characterized in that: The slider component (23) comprises a guide frame (233), a first slider (231) and a second slider (232); the guide frame (233) is provided with a through hole (2331); the first slider (231) and the second slider (232) both comprise a first section (2311) and a second section (2312); and an assembly method of the slider component (23) comprises: The first section (2311) of the first slider (231) is arranged outside the through hole (2331), and the second section (2312) of the first slider (231) is extended into the through hole (2331); The first section (2311) of the second slider (232) is arranged on a side of the through hole (2331) away from the first section (2311) of the first slider (231), and the second section (2312) of the second slider (232) is extended into the second section (2312) of the first slider (231); The guide frame (233) is connected to the connecting rod (21).

4. The assembly method of a reversible solenoid valve according to claim 2, characterized in that: The piston component (22) comprises an intermediate baffle (221), a first portion (222) and a second portion (223). The assembly method of the piston component (22) comprises: The first part (222) and the second part (223) are respectively placed on both sides of the middle baffle (221) and fixedly connected.

5. The assembly method of a reversible solenoid valve according to claim 4, characterized in that: The first part (222) includes a first baffle (2221) and a bowl-shaped first piston bowl (2222), and the second part (223) includes a second baffle (2231) and a bowl-shaped second piston bowl (2232). The steps before fixing the first part (222), the middle baffle (221) and the second part (223) together further include: Placing the first piston bowl (2222) and the second piston bowl (2232) back to back on both sides of the middle baffle (221); The first baffle (2221) is disposed in the first piston bowl (2222), and the second baffle (2231) is disposed in the second piston bowl (2232).

6. The assembly method of a reversible solenoid valve according to claim 1, characterized in that: The middle end cover (16) and the valve body (10) are fixed by welding.

7. The assembly method of a reversible solenoid valve according to claim 1, characterized in that: A solder groove (166) is provided on the outer side wall of the middle end cover (16). Before welding the middle end cover (16) to the valve body (10), solder or a solder ring is placed in the solder groove (166).

8. The assembly method of a reversible solenoid valve according to claim 1, characterized in that: The reversible solenoid valve further comprises a pilot valve (30), and the steps between installing the valve seat (17) into the valve cavity (11) and installing the valve core assembly (20) into the valve cavity (11) further comprise: The pilot valve (30) is fixed on the valve body (10).

9. The assembly method of a reversible solenoid valve according to claim 1, characterized in that: The intermediate end cover (16) comprises a guide sleeve (165) and a cover body (164), a sealing groove (162) being provided in the guide sleeve (165), and the steps of fixedly connecting the intermediate end cover (16) and the valve body (10) include: Welding the cover (164) to the inner wall of the valve body (10); The sealing ring (163) is arranged in the sealing groove (162); The guide sleeve (165) is extended into the valve cavity (11) and fixedly connected to the cover body (164).

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