Capacity control valve

Patent metadata

Field	Value
Publication number	US-11754194-B2
Application number	US-202017599520-A
Country	US
Kind code	B2
Filing date	Apr 2, 2020
Priority date	Apr 3, 2019
Publication date	Sep 12, 2023
Grant date	Sep 12, 2023

Abstract

A capacity control valve includes a valve housing provided with a suction fluid supply chamber to which a suction fluid of suction pressure Ps is supplied, and a control fluid supply chamber to which a control fluid of control pressure Pc is supplied, a CS valve formed by a CS valve element driven in the axial direction by a solenoid, and a CS valve seat provided in a communication passage between the control fluid supply chamber and the suction fluid supply chamber, the CS valve being connectable to and separable from the CS valve seat, and a pressure drive portion arranged in the control fluid supply chamber in a sealed manner and biasing the CS valve element in the opposite direction to the driving direction by the solenoid.

First claim

The invention claimed is:

1. A capacity control valve comprising:
a valve housing provided with a suction fluid supply chamber to which a suction fluid of suction pressure is supplied, and a control fluid supply chamber to which a control fluid of control pressure is supplied;
a CS valve formed by a CS valve element driven in an axial direction by a solenoid, and a CS valve seat provided in a communication passage between the control fluid supply chamber and the suction fluid supply chamber, the CS valve being connectable to and separable from the CS valve seat; and
a pressure drive portion arranged in the control fluid supply chamber in a sealed manner and biasing the CS valve element in an opposite direction to a driving direction of the solenoid, wherein
the control fluid is introduced on a first side of the pressure drive portion, and the suction fluid is introduced on a second side of the pressure drive portion, the first side and the second side being opposed to each other through the pressure drive portion in the axial direction;
the capacity control valve further comprises a retaining member that retains the pressure drive portion, and
the retaining member is provided with a supply port communicating with an inside of the pressure drive portion, the supply port being directed in the axial direction.

2. A capacity control valve comprising:
a valve housing provided with a suction fluid supply chamber to which a suction fluid of suction pressure is supplied, and a control fluid supply chamber to which a control fluid of control pressure is supplied;
a CS valve formed by a CS valve element driven in an axial direction by a solenoid, and a CS valve seat provided in a communication passage between the control fluid supply chamber and the suction fluid supply chamber, the CS valve being connectable to and separable from the CS valve seat; and
a pressure drive portion arranged in the control fluid supply chamber in a sealed manner and biasing the CS valve element in an opposite direction to a driving direction of the solenoid, wherein
the control fluid is introduced on a first side of the pressure drive portion, and the suction fluid is introduced on a second side of the pressure drive portion, the first side and the second side being opposed to each other through the pressure drive portion in the axial direction,
the capacity control valve further comprises a return spring that is provided separately from the pressure drive portion and biases the CS valve element in the opposite direction to the driving direction of the solenoid, and
the CS valve element and the pressure drive portion are out of contact upon a non-driving state of the solenoid.

3. The capacity control valve according to claim 2 , wherein
the pressure drive portion includes a spring that biases the CS valve element in the opposite direction to the driving direction of the solenoid, and the spring has a spring constant higher than a spring constant of the return spring.

4. The capacity control valve according to claim 2 , further comprising a retaining member that retains the pressure drive portion, wherein
the retaining member is provided with a supply port communicating with an inside of the pressure drive portion, the supply port being directed in the axial direction.

5. The capacity control valve according to claim 1 , further comprising a return spring that is provided separately from the pressure drive portion and biases the CS valve element in the opposite direction to the driving direction of the solenoid, wherein
the CS valve element and the pressure drive portion are out of contact upon a non-driving state of the solenoid.

6. The capacity control valve according to claim 5 , wherein
the pressure drive portion includes a spring that biases the CS valve element in the opposite direction to the driving direction of the solenoid, and the spring has a spring constant higher than a spring constant of the return spring.

7. The capacity control valve according to claim 1 , wherein an effective pressure receiving area of the pressure drive portion is larger than an area of a valve opening of the CS valve seat.

8. The capacity control valve according to claim 2 , wherein an effective pressure receiving area of the pressure drive portion is larger than an area of a valve opening of the CS valve seat.

Assignees

• Eagle Ind Co Ltd

Inventors

• Hayama Masahiro
• Fukudome Kohei
• Kanzaki Toshinori
• Takahashi Wataru
• Shirafuji Keigo

Classifications

• F16K31/0655 Primary

  Lift valves · CPC title

• F16K17/06 Primary

  with special arrangements for adjusting the opening pressure · CPC title

• F04B27/18

  by varying the relative positions of a swash plate and a cylinder block · CPC title

• F16K1/54

  Arrangements for modifying the way in which the rate of flow varies during the actuation of the valve · CPC title

• F16K31/0693

  Pressure equilibration of the armature · CPC title