JP7366162B2 - How to install an electromagnetic three-way valve and the electromagnetic three-way valve - Google Patents

Description

The present application relates to the technical field of valves, and specifically relates to a method of mounting an electromagnetic three-way valve and a three-way electromagnetic valve.

There are many types of traditional flow control valves, including the commonly used three-way solenoid valve, and the three-way solenoid valve in the refrigeration industry usually has one inlet and two outlets, but this Fluid entering through one inlet can only exit through one of the two outlets, i.e. the inlet can only communicate with one outlet and is cut off from the other outlet, thereby It only has a "conduction" or "blocking" function, and cannot realize proportion-based distribution. Some three-way solenoid valves have a relatively complex overall structure, and the processing and assembly steps are long and difficult, making it difficult to ensure accurate processing accuracy.

The main purpose of the present application is to provide a method for installing an electromagnetic three-way valve and an electromagnetic three-way valve to solve the problem of the complicated installation process of the three-way electromagnetic valve in the prior art.

To achieve the above object, according to an alternative embodiment of the present application, the guide sleeve and the valve seat are connected, the nut assembly and the valve seat are connected, and the valve core assembly is connected to the valve core assembly. The valve core assembly is assembled by sequentially attaching the screw, packing, spring, and valve stem to the spring sleeve from the bottom to the top and connecting the valve stem and the spring sleeve, and the valve core assembly is assembled from the bottom to the top of the valve seat. The present invention provides a method of installing an electromagnetic three-way valve, which includes: attaching the valve seat to the valve seat, passing the valve through a guide sleeve, and connecting the valve to a nut assembly.

In one alternative embodiment, the guide sleeve is mounted over the valve seat when connecting the guide sleeve and the valve seat.

In an alternative embodiment, the guide sleeve has a small diameter segment and a large diameter segment connected in sequence, the large diameter segment being connected to the valve seat, and in connecting the nut assembly and the valve seat, the nut assembly The nut assembly is fitted over the valve seat to the outside of the small diameter segment of the guide sleeve and then connected to the valve seat, and the nut assembly is brought into contact with the guide sleeve.

In an alternative embodiment, when assembling the valve core assembly, the screw is first drilled into the spring sleeve from the bottom to the top so that the protrusion of the screw abuts the inner edge of the spring sleeve, and then the packing and the spring are inserted into the spring sleeve. are sequentially installed into the spring sleeve from bottom to top so that both ends of the packing are in contact with the screw and spring, respectively, and then the valve stem and the bottom of the spring sleeve are connected.

In an alternative embodiment, after connecting the valve stem and the bottom of the spring sleeve, the first gasket, the sealing ring, and the second gasket are sequentially attached to the bottom of the valve stem from bottom to top, and the second gasket and the valve stem are tightly fitted.

In an alternative embodiment, the method of mounting the electromagnetic three-way valve includes, before connecting the guide sleeve and the valve seat, connecting the first connecting pipe and the second connecting pipe to the side of the valve seat, and connecting the first connecting pipe with the valve seat. The method further includes providing the tubes and the second connecting tubes offset along an axial direction of the valve core assembly.

In an alternative embodiment, the method for installing an electromagnetic three-way valve further includes connecting the third connecting pipe to the bottom surface of the valve seat after installing the valve core assembly to the valve seat.

In an alternative embodiment, when connecting the third connecting pipe, the third connecting pipe and the valve core seat are connected, and the valve core seat is attached to the opening at the bottom of the valve seat to close the opening.

In an alternative embodiment, the method for installing the electromagnetic three-way valve further includes fitting the rotor assembly to the outside of the nut assembly and connecting the rotor assembly and the top of the screw after installing the third connecting pipe. include.

In an alternative embodiment, upon connecting the rotor assembly and the top of the screw, the axial position of the valve core assembly relative to the valve seat and the position of the rotor assembly relative to the nut assembly are adjusted to initialize the electromagnetic three-way valve. become

In an alternative embodiment, the method of installing the electromagnetic three-way valve includes, after installing the rotor assembly, putting the housing over the outside of the rotor assembly, connecting the housing and the valve seat, and then connecting the housing and the valve seat. The method further includes connecting at least one of the above and the fixed holder.

According to other aspects of the present application, a valve seat, a guide sleeve connected to the valve seat, a nut assembly connected to the valve seat, and a valve bored within the guide sleeve and connected to the nut assembly. Provided is an electromagnetic three-way valve including a core assembly, the valve core assembly including a spring sleeve fitted into a guide sleeve, a screw, a packing, a spring, and a valve stem connected to the spring sleeve in order from above. are doing.

In an alternative embodiment, the valve seat has a first chamber and a second chamber that are vertically spaced apart, and a first valve port is formed between the first chamber and the second chamber; The first chamber communicates with the first connecting pipe and the third connecting pipe, the second chamber communicates with the second connecting pipe, and a second valve port is formed between the first chamber and the third connecting pipe, The valve core assembly controls the opening of the first valve port and the second valve port.

In an alternative embodiment, the valve core assembly further includes a first gasket, a sealing ring, and a second gasket disposed in order from above, the first gasket engaging the first valve port, and the second gasket engaging the first valve port. engages the second valve port.

In an alternative embodiment, the inner diameter of the first valve port is greater than the outer diameter of the spring sleeve and smaller than the diameter of the first gasket.

In an alternative embodiment, the guide sleeve has a small diameter segment and a large diameter segment connected in sequence, the large diameter segment being connected to the valve seat, and a portion of the nut assembly fitting outside the small diameter segment. .

Applying the technical aspects of the present application, the valve core assembly is formed by sequentially attaching the screw, packing, spring, and valve stem to the spring sleeve from the bottom to the top, and the assembled valve core assembly is also attached to the valve seat from the bottom to the top. This further simplifies the whole process of electromagnetic three-way valve, and greatly facilitates the installation process of electromagnetic three-way valve, and the valve seat is fitted with a guide sleeve, and the valve core assembly is attached to the guide sleeve. The guide stroke is increased by the installation of the guide sleeve, and the coaxiality of the valve core assembly is improved, ensuring the installation accuracy of the valve core assembly and ensuring the normal and stable operation of the electromagnetic three-way valve. This is advantageous in ensuring proper operation.

The drawings in the specification forming part of the present application are for the purpose of providing a further understanding of the present application, and the schematic embodiments of the present application and their description are for the purpose of interpreting the present application. , which are not intended to unduly limit this application.

The configuration schematic diagram when the first connecting pipe and the second connecting pipe of the electromagnetic three-way valve of the present application are fully opened is shown. FIG. 2 shows a schematic configuration diagram when the first connecting pipe and the third connecting pipe of the electromagnetic three-way valve in FIG. 1 are fully opened. FIG. 2 shows a schematic configuration diagram of a valve core assembly of the electromagnetic three-way valve in FIG. 1. FIG.

Here, the following symbols are included in the above drawings.
10 guide sleeve, 20 valve seat, 21 first chamber, 22 second chamber, 23 first valve port, 24 second valve port, 30 nut assembly, 40 valve core assembly, 41 screw, 42 packing, 43 spring, 44 valve Stem, 45 Spring sleeve, 46 First gasket, 47 Sealing ring, 48 Second gasket, 50 First connecting pipe, 60 Second connecting pipe, 70 Third connecting pipe, 80 Valve core seat, 90 Rotor assembly, 100 Housing , 110 Fixed holder.

Note that the embodiments and features in the embodiments of the present application can be combined with each other unless there is a contradiction. Hereinafter, the present application will be described in detail in conjunction with examples with reference to the drawings.

The present application provides an electromagnetic three-way valve mounting method and an electromagnetic three-way valve in order to solve the problem of the complicated mounting process of the three-way electromagnetic valve in the prior art.

The electromagnetic three-way valve as shown in FIGS. 1 to 3 includes a valve seat 20, a guide sleeve 10 connected to the valve seat 20, a nut assembly 30 connected to the valve seat 20, and a valve core assembly 40. , the valve core assembly 40 is bored within the guide sleeve 10 and connected to the nut assembly 30, and the valve core assembly 40 is connected to a spring sleeve 45 fitted within the guide sleeve 10 and to the spring sleeve 45 from above. It includes a screw 41, a packing 42, a spring 43, and a valve stem 44 that are connected in this order. Correspondingly, the mounting method includes connecting the guide sleeve 10 and the valve seat 20, connecting the nut assembly 30 and the valve seat 20, and connecting the screw 41, packing 42, and spring 43 of the valve core assembly 40. , and the valve stem 44 are sequentially attached to the spring sleeve 45 from the bottom to the top, and the valve stem 44 and the spring sleeve 45 are connected to assemble the valve core assembly 40, and the valve core assembly 40 is attached to the valve seat. The valve seat 20 is attached to the valve seat 20 from the bottom to the top of the valve 20, passed through the guide sleeve 10, and then connected to the nut assembly 30.

In this embodiment, the valve core assembly 40 is formed by sequentially attaching the screw 41, the packing 42, the spring 43, and the valve stem 44 to the spring sleeve 45 from the bottom to the top. The guide sleeve 10 is attached to the valve seat 20 upward, which further simplifies the whole process of the electromagnetic three-way valve, and greatly facilitates the installation process of the electromagnetic three-way valve. The valve core assembly 40 is drilled into the guide sleeve 10, and the guide stroke is increased by installing the guide sleeve 10, and furthermore, the coaxiality of the valve core assembly 40 is improved, so that the valve core assembly 40 is This is advantageous in ensuring installation accuracy and ensuring normal and stable operation of the electromagnetic three-way valve.

Note that attaching the screw 41, packing 42, spring 43, and valve stem 44 to the spring sleeve 45 in order from the bottom to the top means that the screw 41, packing 42, spring 43, and valve stem 44 are attached to the spring sleeve 45 in order from the bottom to the top. It refers to the structure in which the screw 41, the packing 42, the spring 43, and the valve stem 44 are sequentially arranged from above by being attached to the spring sleeve 45 in order from the lower end of the sleeve 45 upward.

In this embodiment, when connecting the guide sleeve 10 and the valve seat 20, the guide sleeve 10 can be attached onto the valve seat 20 by pressing the guide sleeve 10 onto the valve seat 20 from above the valve seat 20. . Specifically, an annular groove is formed on the upper surface of the valve seat 20, and the bottom of the guide sleeve 10 and the annular groove are tightly fitted, and when the guide sleeve 10 is directly press-fitted into the annular groove during installation, the guide sleeve The guide sleeve 10 can be reliably connected to the valve seat 20 by the interference fit between the guide sleeve 10 and the annular groove.

The outer side of the guide sleeve 10 of this embodiment includes a small diameter segment and a large diameter segment that are connected in order from the top, and the bottom of the large diameter segment is tightly fitted into the annular groove and connected to the valve seat 20, and is connected to the nut assembly 30. When connecting the valve seat 20, the nut assembly 30 is fitted onto the outside of the small diameter segment of the guide sleeve 10 from above the valve seat 20, and then connected to the valve seat 20, so that the nut assembly 30 is fitted onto the end face of the small diameter segment. Alternatively, the nut assembly 30 abuts the guide sleeve 10 by abutting the stepped surface formed by the large diameter segment and the small diameter segment, and engages the annular groove to move the guide sleeve 10 into the valve seat 20. After stably fixing the nut assembly 30 and the valve seat 20, the nut assembly 30 and the valve seat 20 may be welded together by laser welding.

In this example, most of the parts to be welded by laser welding are made by first assembling two members together by tight fitting and then welding them together by laser welding. It is possible to ensure relative stability between the two, making it easier to perform welding operations.

As shown in FIG. 3, the top of the spring sleeve 45 has an inner edge extending radially inward, the lower end of the screw 41 has a protrusion extending radially outward, and both the packing 42 and the spring 43 are connected to the spring sleeve 45. 45 and is tightly fitted with the top end of the valve stem 44 and the bottom end of the spring sleeve 45. When assembling the valve core assembly 40, the screw 41 is first drilled into the spring sleeve 45 from the bottom to the top, and the screw 41 is inserted into the spring sleeve 45 from the bottom to the top. 41 is brought into contact with the inner edge of the spring sleeve 45, and by doing so, the upper part of the screw 41 extends from the spring sleeve 45, thereby facilitating subsequent engagement with the nut assembly 30, After that, the packing 42 and the spring 43 are sequentially installed into the spring sleeve 45 from the bottom to the top, and both ends of the packing 42 are brought into contact with the screw 41 and the spring 43, respectively, and then the valve stem 44 is press-fitted into the bottom of the spring sleeve 45. Then, the valve stem 44 and spring sleeve 45 are welded together by laser welding. When the screw 41 moves, the screw 41 presses the packing 42 and the spring 43 to move the valve stem 44, and when the valve stem 44 cannot continue to move, the screw 41, the packing 42, and Since the spring 43 is movable relative to the spring sleeve 45, the screw 41 has a certain margin of movement, and since the movement of the screw 41 presses the spring 43 via the packing 42, all of the movement is caused by the spring 43. is converted into elastic force and stored to avoid direct contact.

In this embodiment, the valve core assembly 40 further includes a first gasket 46, a sealing ring 47, and a second gasket 48, which are provided in order from the top, and after connecting the valve stem 44 and the bottom of the spring sleeve 45. A first gasket 46, a sealing ring 47, and a second gasket 48 are sequentially bored from the lower end of the valve stem 44 to the lower part of the valve stem 44 from below to above. Two gaskets 48 form a structure arranged in order from above, and both the first gasket 46 and the sealing ring 47 can move freely with respect to the valve stem 44, but the second gasket 48 and the valve stem 44 adopts an interference fit mounting configuration, and the first gasket 46 and the second gasket 48 each engage with the valve seat 20 to control the conduction/cutoff of the electromagnetic three-way valve and the distribution of the flow rate. The electromagnetic three-way valve achieves the effect of being able to provide flow to multiple outlets simultaneously, and the specific flow distribution ratio can be adjusted to any ratio according to the needs of the system. The sealing ring 47 is mainly provided to seal the gap between the first gasket 46 and the second gasket 48, which is caused by the movement of the first gasket 46 relative to the valve stem 44. Therefore, some fluid may spill out from the gap between the first gasket 46 and the valve stem 44, and the sealing ring 47 closes this gap and prevents the fluid from spilling, reducing the effectiveness of the electromagnetic three-way valve. This is because it is possible to secure the

In this embodiment, the electromagnetic three-way valve is attached by welding the first connecting pipe 50 and the second connecting pipe 60 to the side surface of the valve seat 20 by in-furnace welding before connecting the guide sleeve 10 and the valve seat 20. At the same time, the method further includes providing the first connecting pipe 50 and the second connecting pipe 60 offset along the axial direction of the valve core assembly 40. The method for installing the electromagnetic three-way valve further includes connecting the third connecting pipe 70 to the bottom surface of the valve seat 20 after installing the valve core assembly 40 to the valve seat 20.

Specifically, the valve seat 20 of this embodiment includes a first chamber 21 and a second chamber 22 that are spaced apart from each other in order from the bottom, and the first connecting pipe 50 is connected to the first chamber 21 as a fluid inlet. The second connecting pipe 60 is connected to the second chamber 22 as one fluid outlet, and the third connecting pipe 70 is also connected to the first chamber 21 as the other fluid outlet, so that the first chamber 21 and the second A first valve port 23 is provided between the chamber 22 and the first valve port 23, which is larger than the spring sleeve 45 and slightly smaller than the first gasket 46. By engaging with the first valve port 23, the conduction/blocking and opening degree of the first connecting pipe 50 and the second connecting pipe 60 are controlled, and both the first connecting pipe 50 and the second connecting pipe 60 are electromagnetic. The third connecting pipe 70 is perpendicular to the axis of the three-way valve, and the third connecting pipe 70 is parallel to the axis of the electromagnetic three-way valve. The size is slightly smaller than the size of the second gasket 48, and the second gasket 48 engages with the second valve port 24 to establish and disconnect the first connecting pipe 50 and the third connecting pipe 70, and to control the opening degree. As the valve core assembly 40 moves up and down, both the engagement relationship between the first gasket 46 and the first valve port 23 and the engagement relationship between the second gasket 48 and the second valve port 24 change. By doing so, the fluid flow rates of the second connecting pipe 60 and the third connecting pipe 70 are changed, thereby realizing flow rate distribution.

In this embodiment, the bottom of the valve seat 20 is open, and the opening is large to facilitate assembly of the valve core assembly 40 from the bottom of the valve seat 20. A valve core seat 80 is further provided in consideration of the fact that the valve core seat 80 is difficult to block the open side, and when connecting the third connecting pipe 70, the third connecting pipe 70 and the valve core seat 80 are first connected by in-furnace welding. After that, the valve core seat 80 is press-fitted into the bottom opening of the valve seat 20 by interference fit, and then it and the valve seat 20 are welded together by laser welding. The opening at the bottom of the seat 20 can be closed to ensure that fluid can only flow out from the second connecting tube 60 and the third connecting tube 70 and not from other parts.

In this embodiment, since the valve core seat 80 is provided, the second gasket 48 does not directly engage with the third connecting pipe 70 but engages with the valve core seat 80, and the second valve port 24 The second gasket 48 is opened at the valve core seat 80 and comes into contact with and engages with the valve core seat 80 to change the opening degree of the second valve port 24 . Of course, the third connecting pipe 70 may extend into one end of the valve core seat 80 and directly contact and engage with the second gasket 48. In this case, the pipe opening of the third connecting pipe 70 is connected to the second valve core seat 80. It becomes mouth 24.

In this embodiment, the method of installing the electromagnetic three-way valve is to attach the third connecting pipe 70, then put the rotor assembly 90 over the nut assembly 30 from above, and then attach the rotor assembly 90 to the top of the screw 41. further comprising connecting the. When connecting the rotor assembly 90 and the top of the screw 41, the axial position of the valve core assembly 40 with respect to the valve seat 20 and the position of the rotor assembly 90 with respect to the nut assembly 30 are adjusted to initialize the electromagnetic three-way valve. There is a need. Note that this initialization refers to adjusting the valve core assembly 40 and rotor assembly 90 so that the electromagnetic three-way valve meets the requirements at the time of shipment, and the specific initialization conditions may vary depending on the actual requirements. One example of initialization adjustment is given below. The axial position of the valve core assembly 40 is adjusted so that the second gasket 48 and the third connecting pipe 70 in the valve core assembly 40 are in contact with each other, and at this time, the position of the valve core assembly 40 is at the lower limit position, and the position corresponding to this is adjusted. The stop rod in the rotor assembly 90 and the slip located on the rail of the linear spring of the nut assembly 30 are arranged so that the rotor assembly 90 is located at the lower limit position relative to the nut assembly 30, that is, the position shown in FIG. The ring adjusts the position of the rotor assembly 90 relative to the nut assembly 30, thereby completing the initialization adjustment, and then the rotor assembly 90 and the valve stem 44 are welded together by laser welding. The connection between rotor assembly 90 and valve stem 44 may be completed.

In this embodiment, the method of installing the electromagnetic three-way valve is as follows: After installing the rotor assembly 90, the housing 100 is placed over the outside of the rotor assembly 90, and the housing 100 and the valve seat 20 are welded together by laser welding. 100 and the valve seat 20 and a fixed holder 110 for winding the coil together by laser welding, thereby completing the assembly of the entire electromagnetic three-way valve. be able to.

Note that the plurality in the above-mentioned embodiments refers to at least two.

From the above description, it can be seen that the above-mentioned embodiments of the present application achieve the following technical effects.
1. This solves the problem of the complicated installation process of the three-way solenoid valve in the prior art.
2. The entire process of the electromagnetic three-way valve has been further simplified, and the installation process of the electromagnetic three-way valve has become much easier.
3. The provision of the guide sleeve increases the stroke of the guide, and further improves the coaxiality of the valve core assembly, which is advantageous in ensuring the installation accuracy of the valve core assembly.
4. The effect of the electromagnetic three-way valve is that it can provide flow to multiple outlets simultaneously.

It is clear that the embodiments described above are only some, but not all, embodiments of the present application. Based on the embodiments in this application, all other embodiments that a person skilled in the art can obtain without creative efforts should fall within the scope of protection of this application.

What has been described above are only preferred embodiments of the present application and are not intended to limit the present application, and the present application is capable of various modifications and variations to those skilled in the art. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of this application shall be included within the protection scope of this application.

Claims (16)

connecting the guide sleeve (10) and the valve seat (20);
connecting a nut assembly (30) and the valve seat (20);
Attach the valve core assembly (40) to the spring sleeve (45) in order from bottom to top, including the screw (41), packing (42), spring (43), and valve stem (44) of the valve core assembly (40). assembling by connecting the valve stem (44) and the spring sleeve (45);
The valve core assembly (40) is attached to the valve seat (20) from below to above the valve seat (20), passed through the guide sleeve (10), and then connected to the nut assembly (30). and,
How to install an electromagnetic three-way valve including The method for mounting an electromagnetic three-way valve according to claim 1, wherein the guide sleeve (10) is mounted on the valve seat (20) when connecting the guide sleeve (10) and the valve seat (20). . The guide sleeve (10) has a small diameter segment and a large diameter segment that are connected in sequence, the large diameter segment is connected to the valve seat (20), and the nut assembly (30) is connected to the nut assembly (30). ) and the valve seat (20), the guide sleeve (10) is fitted onto the outside of the small diameter segment of the guide sleeve (10) from above the valve seat (20) and then connected to the valve seat (20). The method of installing an electromagnetic three-way valve according to claim 2, wherein the nut assembly (30) is brought into contact with the guide sleeve (10). When assembling the valve core assembly (40), the screw (41) is drilled into the spring sleeve (45) from below to above, and the protrusion of the screw (41) is inserted into the inner edge of the spring sleeve (45). Then, the packing (42) and the spring (43) are sequentially installed into the spring sleeve (45) from below to above, and both ends of the packing (42) are attached to the screw (41) and the spring (43). The method for installing an electromagnetic three-way valve according to claim 1, wherein the valve stem (44) and the bottom of the spring sleeve (45) are connected after being brought into contact with the springs (43), respectively. After connecting the valve stem (44) and the bottom of the spring sleeve (45), the first gasket (46), the sealing ring (47), and the second gasket (48) are inserted into the valve from bottom to top. The method for installing an electromagnetic three-way valve according to claim 4, wherein the electromagnetic three-way valve is attached to the lower part of the stem (44) in order, and the second gasket (48) and the valve stem (44) are tightly fitted. Before connecting the guide sleeve (10) and the valve seat (20), connect the first connecting pipe (50) and the second connecting pipe (60) to the side surface of the valve seat (20), and The method for mounting an electromagnetic three-way valve according to claim 1, further comprising providing the first connecting pipe (50) and the second connecting pipe (60) offset along the axial direction of the valve core assembly (40). . The electromagnetic device of claim 1, further comprising connecting a third connecting pipe (70) to a bottom surface of the valve seat (20) after attaching the valve core assembly (40) to the valve seat (20). How to install a three-way valve. When connecting the third connecting pipe (70), connect the third connecting pipe (70) and the valve core seat (80), and connect the valve core seat (80) to the bottom of the valve seat (20). The method for installing an electromagnetic three-way valve according to claim 7, wherein the electromagnetic three-way valve is attached to an opening of the valve to close the opening. After installing the third connecting pipe (70), a rotor assembly (90) is fitted to the outside of the nut assembly (30) to connect the rotor assembly (90) and the top of the screw (41). The method for mounting an electromagnetic three-way valve according to claim 7, further comprising: When connecting the rotor assembly (90) and the top of the screw (41), the axial position of the valve core assembly (40) with respect to the valve seat (20) and the rotor with respect to the nut assembly (30) The method of installing a three-way electromagnetic valve according to claim 9, wherein the three-way electromagnetic valve is initialized by adjusting the position of the assembly (90). After installing the rotor assembly (90), a housing (100) is placed over the outside of the rotor assembly (90) to connect the housing (100) and the valve seat (20), and then the housing (100) is connected to the valve seat (20). 100) and the valve seat (20) to a fixed holder (110). Valve seat (20) and
a guide sleeve (10) connected to the valve seat (20);
a nut assembly (30) connected to the valve seat (20);
a valve core assembly (40) bored within the guide sleeve (10) and connected to the nut assembly (30), the spring sleeve (45) being fitted within the guide sleeve (10); , and a valve core assembly (40) including a screw (41), a packing (42), a spring (43), and a valve stem (44) connected to the spring sleeve (45) in order from above;
including ;
The valve seat (20) has a first chamber (21) and a second chamber (22) that are vertically spaced apart, and the first chamber (21) and the second chamber (22) are separated from each other. A first valve port (23) is formed in between;
The inner diameter of the first valve port (23) is larger than the outer diameter of the spring sleeve (45).
Solenoid three-way valve. The first chamber (21) communicates with the first connecting pipe (50) and the third connecting pipe (70), and the second chamber (22) communicates with the second connecting pipe (60), and communicates with the first connecting pipe (50) and the third connecting pipe (70). A second valve port (24) is formed between the chamber (21) and the third connecting pipe (70), and the valve core assembly (40) is connected to the first valve port (23) and the second valve port (23). The electromagnetic three-way valve according to claim 12, which controls the opening degree of the port (24). The valve core assembly (40) further includes a first gasket (46), a sealing ring (47), and a second gasket (48) provided in order from above, and the first gasket (46) is connected to the first gasket (46). 14. An electromagnetic three-way valve according to claim 13, in which the second gasket (48) engages the second valve port (24). The electromagnetic three-way valve according to claim 14 , wherein an inner diameter of the first valve port (23) is smaller than a diameter of the first gasket (46). The guide sleeve (10) has a small diameter segment and a large diameter segment connected in sequence, the large diameter segment is connected to the valve seat (20), and a part of the nut assembly (30) is connected to the small diameter segment. The electromagnetic three-way valve according to claim 12, which is fitted on the outside.

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