Variable-capacity compressor control valve

Patent metadata

Field	Value
Publication number	US-10823162-B2
Application number	US-201716306445-A
Country	US
Kind code	B2
Filing date	Apr 20, 2017
Priority date	Jun 28, 2016
Publication date	Nov 3, 2020
Grant date	Nov 3, 2020

Abstract

Provided is a variable-capacity compressor control valve with a simple configuration that can increase the attraction force of an electromagnetic actuator and thus can reduce the size of the control valve. A sub valve element that is a magnetic body made of the same magnetic material as or a different magnetic material from that of a plunger, which is adapted to move a main valve element in the direction to open or close the valve orifice, is fitted in and fixed to the plunger.

First claim

The invention claimed is:

1. A variable-capacity compressor control valve comprising:
a valve body including a valve chamber with a valve orifice, a Ps inlet/outlet port communicating with a suction chamber of a compressor, a Pd introduction port arranged upstream of the valve orifice and communicating with a discharge chamber of the compressor, and a Pc inlet/outlet port arranged downstream of the valve orifice and communicating with a crank chamber of the compressor;
a main valve element adapted to open or close the valve orifice;
an electromagnetic actuator including a plunger and an attractor, the electromagnetic actuator being adapted to move the main valve element in a direction to open or close the valve orifice;
a pressure-sensitive chamber adapted to receive a suction pressure Ps from the compressor via the Ps inlet/outlet port; and
a pressure-sensitive reaction member adapted to urge the main valve element in the direction to open or close the valve orifice in accordance with a pressure in the pressure-sensitive chamber,
wherein:
the main valve element includes an in-valve release passage for releasing a pressure Pc in the crank chamber to the suction chamber of the compressor via the Ps inlet/outlet port,
a sub valve element adapted to open or close the in-valve release passage is provided,
the plunger has a cylindrical shape, and
a magnetic body made of the same magnetic material as or a different magnetic material from that of the plunger is securely inserted in the plunger in order to increase an attraction force of the electromagnetic actuator.

2. The variable-capacity compressor control valve according to claim 1 , wherein the magnetic body is a cylindrical member.

3. The variable-capacity compressor control valve according to claim 1 , wherein the magnetic body is press-fitted in and fixed to the plunger.

4. The variable-capacity compressor control valve according to claim 1 , wherein a projected area of a lower face of the attractor with respect to a horizontal plane is equal to a projected area of upper faces of the magnetic body and the plunger with respect to the horizontal plane.

Assignees

• Fujikoki Corp

Inventors

• Kume Yoshiyuki
• Asano Hisashi
• Sakamoto Takashi
• Itoh Masaharu

Classifications

• F16K11/044 Primary

  with movable valve members positioned between valve seats · CPC title

• F04B2027/1827

  between crankcase and discharge chamber · CPC title

• F04B27/1804 Primary

  Controlled by crankcase pressure · CPC title

• F04B2027/1818

  Suction pressure · CPC title

• F16K11/048

  with valve seats positioned between movable valve members · CPC title