Motor-operated compressor

Patent metadata

Field	Value
Publication number	US-11225969-B2
Application number	US-202016733384-A
Country	US
Kind code	B2
Filing date	Jan 3, 2020
Priority date	Jan 7, 2019
Publication date	Jan 18, 2022
Grant date	Jan 18, 2022

Abstract

A motor-operated compressor includes a compression part including a fixed scroll and an orbiting scroll that form a compression chamber configured to compress fluid by an orbiting motion of the orbiting scroll relative to the fixed scroll. A motor part is disposed at one side of the compression part, and configured to generate a drive force to cause the orbiting scroll to make the orbiting motion. A rotary shaft is connected to the motor part and the orbiting scroll to transmit the drive force generated by the motor part to the orbiting scroll. A main frame is disposed between the compression part and the motor part in an axial direction of the rotary shaft, and configured to support the fixed scroll in the axial direction of the rotary shaft. A discharge chamber is formed between the fixed scroll and the main frame, and fluid discharged from the compression part passes through the discharge chamber to outside of the motor-operated compressor.

First claim

What is claimed is:

1. A motor-operated compressor comprising:
a compression part including a fixed scroll and an orbiting scroll configured to form a compression chamber in between the fixed scroll and the orbiting scroll, and compress fluid by an orbiting motion of the orbiting scroll relative to the fixed scroll;
a motor part disposed at one side of the compression part, and configured to generate a drive force to cause the orbiting scroll to make the orbiting motion;
a rotary shaft connected to the motor part and the orbiting scroll, respectively, to transmit the drive force generated by the motor part to the orbiting scroll;
a main frame disposed between the compression part and the motor part in an axial direction of the rotary shaft, and configured to support the fixed scroll in an axial direction of the rotary shaft;
a discharge chamber formed between the fixed scroll and the main frame, and configured to be supplied with fluid discharged from the compression part; and
a discharge part formed in the main frame and communicating with outside of the motor-operated compressor and the discharge chamber, respectively, the discharge part being configured to cause fluid discharged from the compression part to the discharge chamber to be discharged to the outside of the motor-operated compressor,
wherein the discharge chamber is formed as an annular chamber surrounding the rotary shaft,
wherein the main frame includes a main frame-side suction flow path configured to supply fluid to be compressed from the motor part to the compression chamber, and
wherein the main frame-side suction flow path is formed between an outer edge of the discharge chamber and an outer edge of the main frame in a radial direction of the rotary shaft.

2. The motor-operated compressor of claim 1 , wherein a fixed scroll-side suction flow path is formed at a position that faces the main frame-side suction flow path in the axial direction on a fixed plate of the fixed scroll.

3. The motor-operated compressor of claim 2 , wherein at least one of the fixed scroll or the main frame includes a partition wall that forms the outer edge of the discharge chamber, and
wherein the partition wall has a section shaped in a form of a closed curve to isolate the discharge chamber from the main frame-side suction flow path and the fixed scroll-side suction flow path.

4. The motor-operated compressor of claim 3 , comprising an o-ring disposed in a position at least one of between the fixed plate and the partition wall or between the main frame and the partition wall.

5. The motor-operated compressor of claim 1 , wherein the fixed scroll includes a rotary shaft accommodation part configured to surround the rotary shaft,
wherein the rotary shaft accommodation part is disposed in the main frame, and
wherein a sealing member configured to enclose the rotary shaft accommodation part is disposed between an outer circumferential surface of the rotary shaft accommodation part and an inner circumferential surface of the main frame.

6. The motor-operated compressor of claim 1 , wherein the fixed scroll includes a fixed plate,
wherein the fixed plate includes a fixed scroll-side discharge flow path configured to discharge the fluid compressed in the compression chamber into the discharge chamber,
wherein the motor-operated compressor further includes a discharge valve, and
wherein the discharge valve is configured to open and close the fixed scroll-side discharge flow path and disposed between the fixed plate and the main frame.

7. The motor-operated compressor of claim 1 , wherein the main frame includes:
an oil separator configured to separate oil from fluid entering the discharge part from the discharge chamber;
an oil separating chamber formed below the oil separator to collect oil separated by the oil separator; and
a main frame-side oil hole penetrating through one side of the main frame in the axial direction and configured to supply the oil collected at the oil separation chamber towards the fixed scroll.

8. The motor-operated compressor of claim 7 , wherein the discharge chamber is formed as an annular chamber surrounding the rotary shaft, and
wherein the main frame-side oil hole is formed between an outer edge of the discharge chamber and an outer edge of the main frame in a radial direction of the rotary shaft.

9. The motor-operated compressor of claim 7 , wherein a rotary shaft-side oil feeding flow path is formed in a hollow part of the rotary shaft, and
wherein the fixed scroll includes a fixed scroll-side oil feeding flow path configured to supply oil supplied from the oil separation chamber through the oil hole to the rotary shaft-side oil feeding flow path, and
wherein the fixed scroll-side oil feeding flow path passes through the fixed plate of the fixed scroll in a radial direction of the rotary shaft, an inlet of the fixed scroll-side oil feeding flow path is disposed to face the main frame-side oil hole in the axial direction, and an outlet of the fixed scroll-side oil feeding flow path is disposed to face an inlet of the rotary shaft-side oil feeding flow path in the radial direction of the rotary shaft.

10. The motor-operated compressor of claim 9 , wherein at least one of the fixed scroll or the main frame includes a projection protruding towards the other of the fixed scroll or the main frame in the axial direction of the rotary shaft, and at least one of an inlet of the oil hole or the inlet of the rotary shaft-side oil feeding flow path is formed in the projection.

11. The motor-operated compressor of claim 10 , wherein the projection is formed on an outside of the discharge chamber in the radial direction of the rotary shaft.

12. The motor-operated compressor of claim 10 , further comprising:
a main housing exposed to the outside of the motor-operated compressor and configured to enclose the motor part; and
a middle housing exposed to the outside of the motor-operated compressor and configured to enclose the compression part, and
wherein the main frame is exposed to the outside of the motor-operated compressor between the main housing and the middle housing in the axial direction, and configured to form an external appearance of the motor-operated compressor together with the main housing and the middle housing.

13. The motor-operated compressor of claim 10 , further comprising a rear housing,
wherein the rear housing is configured to cover the orbiting scroll and disposed opposite to the fixed scroll with respect to the orbiting scroll, to form an intermediate pressure chamber between the rear housing and an orbiting plate of the orbiting scroll,
wherein the orbiting plate includes an intermediate pressure discharge flow path, and
wherein the intermediate pressure discharge flow path is configured to provide communication between the compression chamber and the intermediate pressure chamber to discharge fluid of an intermediate pressure between suction pressure and discharge pressure of the fluid from the compression chamber to the intermediate pressure chamber.

14. A motor-operated compressor comprising:
a compression part including a fixed scroll and an orbiting scroll configured to form a compression chamber in between the fixed scroll and the orbiting scroll, and compress fluid by an orbiting motion of the orbiting scroll relative to the fixed scroll;
a motor part disposed at one side of the compression part, and configured to generate a drive force to cause the orbiting scroll to make the orbiting motion;
a rotary shaft connected to the motor part and the orbiting scroll, respectively, to transmit the drive force generated

Assignees

• Lg Electronics Inc

Inventors

• Her Jongtae
• Min Dongwoo
• Lee Gyeongbeom
• Lee Byeongchul

Classifications

• F04C29/12

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

• F04C29/06

  Silencing (gas-flow silencers or exhaust apparatus for machines or engines in general F01N) · CPC title

• F04C29/0092

  Removing solid or liquid contaminants from the gas under pumping, e.g. by filtering or deposition; Purging; Scrubbing; Cleaning · CPC title

• F04C2240/30

  Casings or housings · CPC title

• F04C29/124

  with inlet and outlet valves specially adapted for rotary or oscillating piston pumps · CPC title