CN-122003559-A - Valve

Abstract

To provide a device to be controlled which can be easily adjusted. A valve (V1) is provided with a housing (60) having a high-pressure space (S2) into which a high-pressure fluid (Pd) flows, a back-pressure space (S3) into which a back-pressure fluid (Pb) flows, a low-pressure space (S1) into which a low-pressure fluid (Ps) flows, and a passage (68) provided between the high-pressure space (S2) and the back-pressure space (S3), and a valve body (61) having high-pressure receiving surfaces (A1-B1) located in the high-pressure space (S2), back-pressure receiving surfaces (A1-E) located in the back-pressure space (S3), and low-pressure receiving surfaces (B1-E) located in the low-pressure space (S1), wherein the valve body (61) is provided with a communication passage (67) for communicating the back-pressure space (S3) with the low-pressure space (S1).

Inventors

• Kurihara Taichi

Assignees

• 伊格尔工业股份有限公司

Dates

Publication Date

20260508

Application Date

20241022

Priority Date

20231027

Claims (10)

1. 1. A valve, having: A housing having a high pressure space into which a high pressure fluid flows, a back pressure space into which a back pressure fluid flows, a low pressure space into which a low pressure fluid flows, and a passage provided between the high pressure space and the back pressure space, and A valve element having a high pressure receiving surface located in the high pressure space, a back pressure receiving surface located in the back pressure space, and a low pressure receiving surface located in the low pressure space, the valve element controlling the opening degree of the passage, Wherein, the The valve is provided with a communication passage that communicates the back pressure space with the low pressure space.
2. 2. The valve of claim 1, wherein, The communication path is a path penetrating the valve element.
3. 3. The valve of claim 1, wherein, The communication path is a path penetrating the housing.
4. 4. The valve of claim 1, wherein, The back pressure space is disposed adjacent to the low pressure space, The communication path is arranged between the shell and the valve core.
5. 5. The valve of claim 4, wherein, The communication path is a radial clearance between the shell and the valve core, and is always communicated with the back pressure space and the low pressure space.
6. 6. A valve, having: A housing having a high pressure space into which a high pressure fluid flows, a back pressure space into which a back pressure fluid flows, a low pressure space into which a low pressure fluid flows, and a passage provided between the back pressure space and the low pressure space, and A valve element having a high pressure receiving surface located in the high pressure space, a back pressure receiving surface located in the back pressure space, and a low pressure receiving surface located in the low pressure space, the valve element controlling the opening degree of the passage, Wherein, the The valve is provided with a communication passage that communicates the high-pressure space with the back pressure space.
7. 7. The valve of claim 6, wherein, The communication path is a path penetrating the housing.
8. 8. The valve of claim 6, wherein, The communication path is a path penetrating the valve element.
9. 9. The valve of claim 6, wherein, The high pressure space is disposed adjacent to the back pressure space, The communication path is arranged between the shell and the valve core.
10. 10. The valve of claim 9, wherein, The communication path is a radial clearance between the shell and the valve core, and is always communicated with the high-pressure space and the back pressure space.

Description

Valve Technical Field The present invention relates to valves, for example valves for controlling pressure. Background As one of compressors used in various industrial fields, there is a scroll compressor which has high compression efficiency and low noise, and is therefore used in various fields such as refrigeration cycle. The scroll compressor has a structure including a fixed scroll having spiral wraps and a movable scroll having spiral wraps, and an eccentric mechanism attached to a rotating shaft to eccentrically rotate the movable scroll, wherein the movable scroll is caused to relatively slide with respect to the fixed scroll along with the eccentric rotation, thereby pressurizing a fluid serving as a refrigerant supplied from a low-pressure chamber on the outer diameter side of both scrolls, and discharging the high-pressure refrigerant from a discharge hole formed in the center of the fixed scroll. In such a scroll compressor, when the pressure of the discharge chamber from which the refrigerant compressed by the scroll compression mechanism is discharged increases, a force acts in a direction to separate the movable scroll from the fixed scroll. The scroll compressor of patent document 1 is provided with a back pressure communication path that communicates a discharge chamber with a back pressure chamber formed on the back surface side of the movable scroll, and an orifice is provided in the back pressure communication path. A part of the compressed refrigerant in the discharge chamber is depressurized by the orifice and adjusted to be supplied to the back pressure chamber, and the movable scroll is pressed against the fixed scroll, so that the movable scroll is prevented from moving away from the fixed scroll. The scroll compressor is provided with a pressure release hole that communicates the back pressure chamber with the suction chamber, and a pressure adjustment valve that releases the pressure of the back pressure chamber to the low pressure chamber to adjust the pressure is provided in the pressure release hole. When the force that presses the valve element in the opening direction according to the pressure of the back pressure chamber exceeds the force that presses the valve element in the closing direction according to the pressure of the low pressure chamber and the urging force of the spring, the pressure regulating valve is opened, the refrigerant in the back pressure chamber flows to the low pressure chamber, and the pressure in the back pressure chamber is reduced. This prevents the movable scroll from being excessively pressed against the fixed scroll by the pressure rise in the back pressure chamber, and thus prevents smooth operation of the movable scroll from being hindered. Prior art literature Patent literature Patent document 1 International publication No. 2022/009769 (pages 8 and 9, FIG. 1) Disclosure of Invention Problems to be solved by the invention In the scroll compressor of patent document 1, when adjustment for the specification is performed, the scroll compressor needs to be subjected to machining such as reworking of the back pressure communication path and the pressure release hole, replacement of the orifice provided in the back pressure communication path, replacement of the spring constituting the pressure adjustment valve, and the like, and thus the operation becomes complicated. The present invention has been made in view of such a problem, and an object thereof is to provide a valve capable of easily adjusting a device to be controlled. Means for solving the problems In order to solve the above problems, a valve according to the present invention includes a housing having a high pressure space into which a high pressure fluid flows, a back pressure space into which a back pressure fluid flows, a low pressure space into which a low pressure fluid flows, and a passage provided between the high pressure space and the back pressure space, and a valve body having a high pressure receiving surface located in the high pressure space, a back pressure receiving surface located in the back pressure space, and a low pressure receiving surface located in the low pressure space, the valve body controlling an opening degree of the passage, wherein the valve is provided with a communication passage that communicates the back pressure space with the low pressure space. Thus, since the valve is provided with the communication passage that communicates the back pressure space with the low pressure space, the controlled device can be easily adjusted without machining the controlled device side. The communication path may be a path penetrating the valve body. Thus, the communication path can be formed without machining the controlled device. The communication path may be a path penetrating the housing. Thus, the communication path can be formed without machining the controlled device. The back pressure space may be disposed adjacent to the low pressure space, and the communicat