Valve device

Abstract

The valve device comprises a valve port part provided with a valve port, a first port and a second port, the valve port can communicate with the first port and the second port, the valve device comprises a valve element, the valve element is provided with a sealing part, the sealing part can abut against or be away from the valve port part, and the valve element is provided with a balance hole channel extending in the axial direction; the valve element is further provided with a circulation hole channel penetrating through the inner surface and the outer surface of the valve element, the valve device has a valve closing position, at the valve closing position, the sealing part and the valve port part are in sealing fit, and the first port, the second port, the balance hole channel and the circulation hole channel are communicated. When the valve device is in the valve closing position, the sealing part and the valve port part are in sealing fit, meanwhile, the valve element of the valve device is provided with the circulation hole channel penetrating through the inside and the outside, the first port, the second port, the circulation hole channel and the balance hole channel are communicated at the valve closing position, the valve device can still keep certain flow at the valve closing position, and the valve device can be suitable for a large-diameter two-way valve.

Description

Technical Field

[0001] This application relates to the technical field of refrigeration control, and particularly relates to a valve device. Background Art

[0002] Traditional valve devices usually achieve a certain flow rate at the valve-closed position by the imperfect fit between the valve needle and the valve port. However, this implementation method is more suitable for small-diameter valve structures and is difficult to achieve for other structural forms such as large-diameter two-way valves. Summary of the Invention

[0003] The purpose of this application is to provide a valve device that is applicable to large-diameter two-way valves and can maintain a certain flow rate at the valve-closed position.

[0004] To solve the above technical problems, this application provides a valve device, including a valve port part provided with a valve port, a first port and a second port. The valve port can communicate the first port and the second port. The valve device includes a valve core, the valve core has a sealing part, the sealing part can abut against or move away from the valve port part, the valve core is provided with a balance hole extending along the axial direction, the valve core is also provided with a flow hole penetrating the inner and outer surfaces of the valve core. The valve device has a valve-closed position. In the valve-closed position, the sealing part and the valve port part are in sealing cooperation, and the first port, the second port, the balance hole and the flow hole are connected and communicated.

[0005] The technical effects of the valve device of this application are as follows:

[0006] When the valve device of this application is in the valve-closed position, the sealing part and the valve port part are in sealing cooperation. At the same time, the valve core of the valve device is provided with a flow hole penetrating the inside and outside. In the valve-closed position, the first port, the second port, the flow hole and the balance hole are connected and communicated, realizing that the valve device still maintains a certain flow rate at the valve-closed position and can be applicable to large-diameter two-way valves. Description of the Drawings

[0007] Figure 1 is a schematic structural diagram of a specific embodiment of the valve device provided by this application;

[0008] Figure 2 is Figure 1 a schematic structural diagram of the valve core in the valve device;

[0009] Among them, Figure 1 - Figure 2 the reference numerals in

[0010] A - valve port; B - first port; C - second port; 101 - valve core; 1011 - first connecting section; 1012 - second connecting section; 101A - sealing part; 101a - balance passage; 101b - flow passage; 102 - valve seat; 102A - valve cavity; 102a - through hole; 102a1 - small - diameter section; 1021 - protruding part; 103 - first connecting pipe; 104 - second connecting pipe; 105 - valve - core sleeve; 106 - annular sealing ring; 107 - limit seat; 107a - limit groove; 108 - nut; 108a - limit protrusion; 109 - retaining ring; 110 - lead screw; 111 - rotor. Detailed implementation manners

[0011] To enable those skilled in the art to better understand the technical solutions of the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0012] Please refer to Figure 1 - Figure 2 , Figure 1 which is a schematic structural diagram of the first specific embodiment of the valve device provided by the present application; Figure 2 and Figure 1 is a schematic structural diagram of the valve core in the valve device.

[0013] This embodiment provides a valve device, including a valve - port part A provided with a valve port, a first port B and a second port C. The valve port can communicate the first port B and the second port C. The valve device includes a valve core 101. The valve core 101 has a sealing part 101A. The sealing part 101A can abut against or move away from the valve - port part A. The valve core 101 is provided with an axially - extending balance passage 101a. The valve core 101 is also provided with a flow passage 101b that penetrates the inner and outer surfaces of the valve core 101. The valve device has a valve - closing position. In the valve - closing position, the sealing part 101A and the valve - port part A are in sealing cooperation, and the first port B, the second port C, the balance passage 101a, and the flow passage 101b are connected and communicated.

[0014] Among them, according to the different flow directions of the refrigerant, in the first port B and the second port C, one can be a fluid inlet and the other can be a fluid outlet.

[0015] When the valve device of the present application is in the valve - closing position, the sealing part 101A and the valve - port part A are in sealing cooperation. At the same time, the valve core 101 of the valve device is provided with a flow passage 101b that penetrates inside and outside. In the valve - closing position, the first port B, the second port C, the flow passage 101b, and the balance passage 101a are connected and communicated, realizing that the valve device still maintains a certain flow rate in the valve - closing position, and can be applicable to large - diameter two - way valves.

[0016] In addition, in a traditional valve device, the valve core 101 is already provided with a balance passage 101a to balance the pressures at both axial ends of the valve core 101 and improve the operating performance of the valve core 101. In this embodiment, the balance passage 101a is further utilized such that a partial area of the balance passage 101a participates in forming a flow passage. During the machining process of the valve core 101, only a flow hole 101b needs to be further machined, which has a simple structure, is convenient to machine, and improves the machining efficiency.

[0017] As Figure 1 shown, in this embodiment, the flow hole 101b extends along the radial direction of the valve core 101, and the flow hole 101b and the balance passage 101a are perpendicular to each other.

[0018] In practice, it is also feasible that the flow hole 101b has a certain inclination angle from the outer radial end to the inner radial end of the valve core 101. For example, from the outer radial end to the inner radial end of the valve core 101, the flow passage 101b extends obliquely upward, or from the outer radial end to the inner radial end of the valve core 101, the flow passage 101b extends obliquely downward, as long as it does not affect the flow of the refrigerant. Of course, in this embodiment, the flow hole 101b extends along the radial direction of the valve core 101, and the flow path of the refrigerant when flowing through the flow hole 101b is the shortest, and the refrigerant can flow through the valve device faster, which is a more preferable technical solution.

[0019] As Figure 1 shown, in this embodiment, the flow hole 101b is an equal-diameter hole.

[0020] In practice, the structure of the flow hole 101b is not limited. For example, it is also feasible that the flow hole 101b is a variable-diameter hole, which does not affect the realization of the above technical effects. Of course, in this embodiment, the flow hole 101b is an equal-diameter hole, and the structure of the flow hole 101b is simple and convenient to machine, which is a more preferable technical solution.

[0021] In this embodiment, the minimum flow area of the flow hole 101b is 1% - 10% of the flow area of the valve port A. The specific value can be adaptively selected according to the flow requirement of the valve device in the valve-closed position, so that the valve device still has a small flow rate in the valve-closed position.

[0022] Please continue to refer to Figure 1 , in this embodiment, the valve device includes a valve seat 102. The valve seat 102 has a valve cavity 102A inside. The valve port A is provided on the valve seat 102. The first port B communicates with the valve cavity 102A. The valve port A and the second port C are axially opposite. The second port C communicates with the valve cavity 102A through the valve port A. The number of the flow holes 101b is one, and the outer port of the flow hole 101b faces the first port B.

[0023] In this embodiment, the outer port of the flow passage 101b is arranged facing the first port B. The distance between the outer port of the flow passage 101b and the first port B is the shortest. When the refrigerant flows from the outer port of the flow passage 101b to the first port B, or from the first port B to the outer port of the flow passage 101b, the flow path is the shortest, and the refrigerant can flow through the valve device faster.

[0024] In practice, there is no limit to the number of the flow passages 101b provided on the valve core 101. For example, the number of the flow passages 101b provided on the valve core 101 can also be multiple, and the multiple flow passages 101b can be arranged at intervals along the circumferential direction and / or the axial direction of the valve core 101.

[0025] Please continue to refer to Figure 1 , in this embodiment, the axial end wall of the valve seat 102 has a protruding portion 1021 protruding outward. The axial end wall of the valve seat 102 is provided with a through hole 102a. The through hole 102a includes a small-diameter section 102a1 and a large-diameter section. The small-diameter section 102a1 communicates with the valve cavity 102A. The port where the small-diameter section 102a1 communicates with the valve cavity 102A forms a valve port portion A. A stepped wall is formed between the small-diameter section 102a1 and the large-diameter section 102a2. The large-diameter section penetrates the axial end wall of the protruding portion 1021. The valve device further includes a first connecting pipe 103. The first connecting pipe 103 is partially inserted into the large-diameter section and abuts against the stepped wall. The port of the first connecting pipe 103 away from the valve seat 102 forms a second port C.

[0026] In this embodiment, the first connecting pipe 103 is partially inserted into the large-diameter section, which can reduce the cross-sectional size of the first connecting pipe 103 and lower the material cost of the first connecting pipe 103.

[0027] Please continue to refer to Figure 2 , in this embodiment, the valve core 101 includes an axially connected first connecting section 1011 and a second connecting section 1012. The first connecting section 1011 is located at one end close to the valve port portion A. The sealing portion 101A is arranged on the first connecting section 1011. The diameter of the second connecting section 1012 is smaller than the diameter of the first connecting section 1011, and the diameter of the second connecting section 1012 is equal to the diameter of the valve port portion A.

[0028] In this way, the diameter of the first connecting section 1011 is larger than the diameter of the second connecting section 1012, and the sealing portion 101A is arranged on the first connecting section 1011, realizing reliable sealing between the sealing portion 101A and the valve port portion A. And the diameter of the second connecting section 1012 is equal to the diameter of the valve port portion A, making the pressures received at both axial ends of the valve core 101 balanced and improving the operating performance of the valve core 101.

[0029] Please continue to refer to Figure 1 and Figure 2, in this embodiment, a through hole extending horizontally is provided on the peripheral wall of the valve seat 102. The valve device further includes a second connecting pipe 104, a part of the second connecting pipe 104 is inserted inside the through hole, and the outer end of the second connecting pipe 104 forms a first port B.

[0030] In this embodiment, the valve device further includes a valve core sleeve 105, an annular sealing ring 106, a limit seat 107, a nut 108, a retaining ring 109, a lead screw 110, a rotor 111 and an external coil (not shown in the figure), wherein:

[0031] The valve core sleeve 105 is fixedly connected to the valve seat 102. A part of the valve core 101 is arranged inside the valve core sleeve 105. The valve core sleeve 105 plays a guiding role for the valve core 101. The valve core 101 can axially move relative to the valve core sleeve 105. The annular sealing ring 106 is arranged between the outer wall of the valve core 101 and the inner wall of the valve core sleeve 105 to achieve circumferential sealing; the nut 108 and the valve core 101 are fixedly connected through the retaining ring 109. The lead screw 110 is connected to the rotor 111. The lead screw 110 is in threaded cooperation with the nut 108. The lead screw 110 is rotatably installed on the limit seat 107 through a bearing. The external coil is located on the outer periphery of the rotor 111. The rotor 111 can be excited and rotated under the driving action of the external coil, and then drive the lead screw 110 to rotate; the limit seat 107 is connected to the end of the valve core sleeve 105 away from the valve seat 102. A limit groove 107a is provided on the peripheral wall of the limit seat 107. A corresponding limit protrusion 108a is provided on the peripheral wall of the nut 108. A part of the nut 108 is located inside the limit seat 107. The limit protrusion 108a is inserted inside the corresponding limit groove 107a to achieve the circumferential limit of the nut 108, so that the nut 108 can only axially move under the threaded cooperation with the lead screw 110, and then drive the valve core 101 to axially move.

[0032] The above is only the preferred embodiment of the present application. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present application, several improvements and retouches can be made, and these improvements and retouches should also be regarded as the protection scope of the present application.

Claims

1. A valve device, characterized in that: The invention comprises a valve opening portion (A) provided with a valve opening, a first port (B) and a second port (C), wherein the valve opening can connect the first port (B) and the second port (C), the valve device comprises a valve core (101), the valve core (101) has a sealing portion (101A), the sealing portion (101A) can abut against or move away from the valve opening portion (A), the valve core (101) is provided with a balancing channel (101a) extending along the axial direction, the valve core (101) is also provided with a flow channel (101b) penetrating the inner and outer surfaces of the valve core (101), the valve device has a valve closing position, in which the sealing portion (101A) and the valve opening portion (A) are sealed and matched, and the first port (B), the second port (C), the balancing channel (101a) and the flow channel (101b) are connected.

2. The valve device according to claim 1, characterized in that The circulation channel (101b) and the balance channel (101a) are arranged vertically.

3. The valve device according to claim 1, characterized in that The flow channel (101b) is a hole of equal diameter.

4. The valve device according to claim 1, characterized in that The minimum flow area of ​​the flow channel (101b) is 1%-10% of the flow area of ​​the valve opening (A).

5. The valve device according to claim 1, characterized in that The valve device comprises a valve seat (102), the valve seat (102) has a valve cavity (102A) inside, the valve mouth portion (A) is arranged on the valve seat (102), the first port (B) is connected to the valve cavity (102A), the valve mouth portion (A) and the second port (C) are axially arranged opposite to each other, the second port (C) is connected to the valve cavity (102A) through the valve mouth portion (A), the number of the flow channel (101b) is at least one, and the outer port of at least one of the flow channels (101b) is arranged toward the first port (B).

6. The valve device according to claim 5, characterized in that The number of the circulation channels (101b) is plural, and the plurality of circulation channels (101b) are arranged at intervals along the circumferential direction and / or axial direction of the valve core (101).

7. The valve device according to any one of claims 1 to 6, characterized in that: The valve core (101) includes a first connecting section (1011) and a second connecting section (1012) which are axially connected, wherein the first connecting section (1011) is located at one end close to the valve mouth portion (A), the sealing portion (101A) is arranged on the first connecting section (1011), the diameter of the second connecting section (1012) is smaller than the diameter of the first connecting section (1011), and the diameter of the second connecting section (1012) is equal to the diameter of the valve mouth portion (A).

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