Capacity control valve

Patent metadata

Field	Value
Publication number	US-12180950-B2
Application number	US-202017600529-A
Country	US
Kind code	B2
Filing date	Apr 2, 2020
Priority date	Apr 3, 2019
Publication date	Dec 31, 2024
Grant date	Dec 31, 2024

Abstract

A capacity control valve includes a valve housing provided with a suction port through which a suction fluid of suction pressure Ps passes, and a control port through which a control fluid of control pressure Pc passes, a valve element configured to be driven by a solenoid, a spring that biases the valve element in a direction opposite to a driving direction of the solenoid, and a CS valve formed by a CS valve seat and the valve element, the CS valve being configured for opening and closing a communication between the control port and the suction port in accordance with a movement of the valve element. The capacity control valve further includes communication controller that controls a communication between the control port and a space on a back surface side of the valve element.

First claim

The invention claimed is:

1. A capacity control valve comprising:
a valve housing provided with a suction port through which a suction fluid of suction pressure passes, and a control port through which a control fluid of control pressure passes;
a valve element configured to be driven by a solenoid;
a first spring that biases the valve element in a direction opposite to a driving direction of the solenoid; and
a control-suction valve formed by a control-suction valve seat provided on an inner peripheral surface of the valve housing and the valve element, the control-suction valve being configured for opening and closing a communication passage between the control port and the suction port by causing the valve element to separate from and come into contact with the control-suction valve seat, wherein
the control pressure is controlled in accordance with opening and closing operation of the control-suction valve,
a space configured for communicating with the control port is formed inside the valve housing and arranged on a back surface side of the valve element,
the valve element has a contact portion which is capable of coming into contact with the control-suction valve seat and which is housed in a valve chamber communicating with the suction port,
the valve chamber is formed by a single continuous space,
the control-suction valve seat is provided so as to face the valve chamber,
the control pressure of the control fluid acts on the valve element through the communication passage which provides a communication between the valve chamber and a control fluid supply chamber communicating with the control port, and
a supplemental spring is arranged in the control fluid supply chamber and interlockingly coupled to the valve element.

2. The capacity control valve according to claim 1 , wherein
the space on the back surface side of the valve element communicates with the suction port.

3. The capacity control valve according to claim 2 , wherein
the space on the back surface side of the valve element communicates with the suction port via a throttle.

4. The capacity control valve according to claim 3 , wherein
a guide hole through which the valve element is inserted is formed in the valve housing on the back surface side of the valve element with respect to the suction port.

5. The capacity control valve according to claim 3 , wherein
a communication between the control port and the space on the back surface side of the valve element is secured when an electromagnetic force is generated in the solenoid.

6. The capacity control valve according to claim 5 , wherein
the solenoid includes a coil, a plunger, a center post, and the first spring arranged between the plunger and the center post,
the plunger, the valve housing in which a through hole passing through in the axial direction is formed, and the center post, which is capable of closing an opening end of the through hole, cooperatively form a passage of the communication between the control port and the space on the back surface side of the valve element and
the center post is movable toward the plunger by the electromagnetic force generated in the solenoid.

7. The capacity control valve according to claim 6 , wherein
the center post is pushed onto the valve housing by a second spring, and
the second spring has larger bias force than the first spring.

8. The capacity control valve according to claim 2 , wherein
a communication between the control port and the space on the back surface side of the valve element is secured when an electromagnetic force is generated in the solenoid.

9. The capacity control valve according to claim 8 , wherein
the solenoid includes a coil, a plunger, a center post, and the first spring arranged between the plunger and the center post,
the plunger, the valve housing in which a through hole passing through in the axial direction is formed, and the center post, which is capable of closing an opening end of the through hole, cooperatively form a passage of the communication between the control port and the first space on the back surface side of the valve element, and
the center post is movable toward the plunger by the electromagnetic force generated in the solenoid.

10. The capacity control valve according to claim 9 , wherein
the center post is pushed onto the valve housing by a second spring, and
the second spring has larger bias force than the first spring.

11. The capacity control valve according to claim 2 , further comprising a control pressure operated valve that includes a second spring arranged in a through hole which passes through the valve housing in an axial direction, and an operated valve element to be biased in a valve closing direction of the control pressure operated valve by the second spring, and that controls a communication between the control port and the space on the back surface side of the valve element.

12. The capacity control valve according to claim 1 , wherein
a communication between the control port and the space on the back surface side of the valve element is secured when an electromagnetic force is generated in the solenoid.

13. The capacity control valve according to claim 12 , wherein
the solenoid includes a coil, a plunger, a center post, and the first spring arranged between the plunger and the center post,
the plunger, the valve housing in which a through hole passing through in the axial direction is formed, and the center post, which is capable of closing an opening end of the through hole, cooperatively form a passage of the communication between the control port and the space on the back surface side of the valve element, and
the center post is movable toward the plunger by the electromagnetic force generated in the solenoid.

14. The capacity control valve according to claim 13 , wherein
the center post is pushed onto the valve housing by a second spring, and
the second spring has larger bias force than the first spring.

15. The capacity control valve according to claim 1 , further comprising a control pressure operated valve that includes a second spring arranged in a through hole which passes through the valve housing in an axial direction, and an operated valve element to be biased in a valve closing direction of the control pressure operated valve by the second spring, and that controls a communication between the control port and the space on the back surface side of the valve element.

Assignees

• Eagle Ind Co Ltd

Inventors

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

Classifications

• F16K31/0655 Primary

  Lift valves · CPC title

• F04B2027/1859

  Suction pressure · CPC title

• F04B2027/1854

  External parameters · CPC title

• F04B2027/1831

  between crankcase and suction chamber · CPC title

• F04B2027/1813

  Crankcase pressure · CPC title