Compressor with pulsation attenuation space disposed in injection passage

Patent metadata

Field	Value
Publication number	US-10876532-B2
Application number	US-201615553512-A
Country	US
Kind code	B2
Filing date	Feb 29, 2016
Priority date	Feb 27, 2015
Publication date	Dec 29, 2020
Grant date	Dec 29, 2020

Abstract

A compressor includes a compression chamber forming member, an injection passage, an injection pipe, and a pulsation attenuation space. The compression chamber forming member forms a compression chamber. The injection passage is formed in at least one of the compression chamber forming member and a separate member disposed in a surrounding area and connecting to the compression chamber. The injection pipe supplies refrigerant to the injection passage. The pulsation attenuation space is formed in one of the compression chamber forming member and the separate member disposed in the surrounding area so as to communicate with the injection passage. The pulsation attenuation space attenuates pulsation of refrigerant gas flowing from the injection pipe into the compression chamber.

First claim

What is claimed is:

1. A compressor comprising:
a compression chamber forming member, including a fixed scroll and a movable scroll, forming a compression chamber;
an injection passage formed in at least one of the compression chamber forming member and a separate member disposed in a surrounding area and connecting to the compression chamber;
an injection pipe supplying refrigerant to the injection passage; and
an expansion chamber formed in one of the compression chamber forming member and the separate member disposed in the surrounding area so as to communicate with the injection passage, the expansion chamber attenuating pulsation of the refrigerant flowing from the injection pipe into the compression chamber,
the expansion chamber being located in a flow path from the injection pipe to the compression chamber such that the refrigerant flows through the expansion chamber in order to reach the compression chamber,
the compressor having a configuration such that
a direction along which the refrigerant flows into the expansion chamber and a direction along which the refrigerant flows out of the expansion chamber intersect each other and
an injection port lies on an extension line of the direction along which the refrigerant flows out of the expansion chamber, and

the compression chamber and the injection passage communicating with each other by the injection port, and
area centers of a flow path cross section on a refrigerant outflow side of the expansion chamber and a flow path cross section of the injection port lying on a common axis.

2. The compressor according to claim 1 , wherein
the expansion chamber has a larger flow path cross-sectional area than the flow path cross-sectional area of the injection port.

3. The compressor according to claim 2 , wherein a ratio of the flow path cross-sectional area of the expansion chamber to the flow path cross-sectional area of the injection port is in a range of 2.0 to 50.

4. The compressor according to claim 3 , wherein the expansion chamber is set to attenuate 70 Hz to 1400 Hz pulsation.

5. The compressor according to claim 2 , wherein the expansion chamber is set to attenuate 70 Hz to 1400 Hz pulsation.

6. The compressor according to claim 1 , wherein the expansion chamber is a Helmholtz space.

7. The compressor according to claim 6 , wherein the expansion chamber is set to attenuate 70 Hz to 1400 Hz pulsation.

8. The compressor according to claim 1 , wherein the expansion chamber is a side branch space.

9. The compressor according to claim 1 , wherein
a length of the injection passage is set to a length that attenuates 70 Hz to 1400 Hz pulsation.

10. The compressor according to claim 1 , wherein the expansion chamber is set to attenuate 70 Hz to 1400 Hz pulsation.

11. A compressor comprising:
a compression chamber forming member, including a fixed scroll and a movable scroll, forming a compression chamber;
an injection passage formed in at least one of the compression chamber forming member and a separate member disposed in a surrounding area and connecting to the compression chamber;
an injection pipe supplying refrigerant to the injection passage; and
an expansion chamber formed in one of the compression chamber forming member and the separate member disposed in the surrounding area so as to communicate with the injection passage, the expansion chamber attenuating pulsation of the refrigerant flowing from the injection pipe into the compression chamber,
the expansion chamber being located in a flow path from the injection pipe to the compression chamber such that the refrigerant flows through the expansion chamber in order to reach the compression chamber,
the compressor having a configuration such that
a direction along which the refrigerant flows into the expansion chamber and a direction along which the refrigerant flows out of the expansion chamber intersect each other and
an injection port lies on an extension line of the direction along which the refrigerant flows out of the expansion chamber, and

a flow path cross section on a refrigerant outflow side of the expansion chamber and a flow path cross section of the injection port having a positional relationship such that
the flow path cross section on the refrigerant outflow side of the expansion chamber and the flow path cross section of the injection port are parallel to each other and
area centers of the flow path cross section on the refrigerant outflow side of the expansion chamber and the flow path cross section of the injection port do not lie on a common axis.

12. The compressor according to claim 11 , wherein the expansion chamber is set to attenuate 70 Hz to 1400 Hz pulsation.

Assignees

• Daikin Ind Ltd

Inventors

• Tsuka Yoshitomo

Classifications

• F04C27/008

  for other than working fluid, i.e. the sealing arrangements are not between working chambers of the machine · CPC title

• F04C29/068

  the silencing means being arranged inside the pump housing · CPC title

• F04C2240/806

  Pipes for fluids; Fittings therefor · CPC title

• F04C29/061

  Silencers using overlapping frequencies, e.g. Helmholtz resonators · CPC title

• F04C29/12

  Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet · CPC title