Scroll compressor having an oil separation space

Patent metadata

Field	Value
Publication number	US-10227983-B2
Application number	US-201615244543-A
Country	US
Kind code	B2
Filing date	Aug 23, 2016
Priority date	Sep 9, 2015
Publication date	Mar 12, 2019
Grant date	Mar 12, 2019

Abstract

A scroll compressor is provided that may include a casing; a drive motor; a fixed scroll that forms a compression space by being coupled to the orbiting scroll; and a discharge cover provided at an inner space of the casing, the discharge cover having a space that communicates with the compression space and separated from the inner space of the casing, and having one or more discharge hole on a side surface thereof, the one or more discharge hole providing communication between an inside and an outside of the space. With such a configuration, vibration noise of the scroll compressor may be more reduced in comparison with a case in which an oil separator is provided outside of the casing. Further, as an area of the one or more discharge hole and a volume of the space are optimized, efficiency of the scroll compressor may be enhanced.

First claim

What is claimed is:

1. A scroll compressor, comprising:
a casing having an inner space;
a drive motor provided at the inner space of the casing, and configured to generate a rotational force;
a rotational shaft rotated by the drive motor;
an orbiting scroll that performs an orbital motion by being coupled to the rotational shaft;
a fixed scroll that forms a compression space by being coupled to the orbiting scroll; and
a discharge cover provided at the inner space of the casing, the discharge cover having a space that communicates with the compression space while being separated from the inner space of the casing, and having one or more discharge hole at a side surface thereof, the one or more discharge holes providing communication between an inside and an outside of the space, wherein an outer circumferential surface of the discharge cover includes:
first surfaces spaced from an inner circumferential surface of the casing; and
a second surface formed between two ends of the first surfaces, the second surface contacting the inner circumferential surface of the casing, wherein the one or more discharge hole is formed on one of the first surfaces, wherein a communication hole, configured to communicate the inside of the space of the discharge cover with the inner space of the easing at which the drive motor is provided, is formed at the fixed scroll, and wherein a ratio (B/A) between a summation of a total sectional area (B) of the one or more discharge hole and a sectional area (A) of the communication hole is within a range of 1.0˜1.5.

2. The scroll compressor of claim 1 , wherein a space formed by an outer side surface of the discharge cover, one side surface of the fixed scroll, and an inner wall surface of the casing is an oil separation space, a discharge pipe is penetratingly-coupled to the casing so as to communicate with the oil separation space, and wherein a sectional area (C) of a flow path inside of the discharge pipe is formed to be equal to or larger than a total sectional area (A+B) of the sectional area (A) of the communication hole and the total sectional area (B) of the one or more discharge hole.

3. The scroll compressor of claim 1 , wherein a discharge pipe is coupled to the one or more discharge hole such that a central longitudinal axis of the discharge pipe extends perpendicular to a central longitudinal axis of the one or more discharge hole.

4. The scroll compressor of claim 1 , wherein a space formed by an outer side surface of the discharge cover, one side surface of the fixed scroll, and an inner wall surface of the casing is an oil separation space, and a volume of the space of the discharge cover is formed to be equal to or smaller than a volume of the oil separation space.

5. The scroll compressor of claim 1 , wherein the space of the discharge cover includes:
a first space configured to accommodate therein an outlet through which a refrigerant inside of the discharge chamber is discharged, and having an outer circumferential surface spaced from the inner circumferential surface of the casing by a predetermined gap; and
a second space that communicates with the first space, configured to accommodate the communication hole therein, and having an outer circumferential surface that contacts the inner circumferential surface of the casing, and wherein the one or more discharge hole is formed such that at least a portion thereof is included in the second space.

6. The scroll compressor of claim 5 , wherein a volume of the first space is larger than a volume of the second space.

7. The scroll compressor of claim 1 , further including a guide configured to guide a refrigerant and oil formed at an outer side surface of the one or more discharge hole.

8. The scroll compressor of claim 7 , wherein the guide extends from the outer side surface of the one or more discharge hole, so as to guide the refrigerant and oil in a circumferential direction.

9. The scroll compressor of claim 1 , further including a frame, configured to support the rotational shaft in a radial direction and to support the orbiting scroll in a central longitudinal direction, is coupled to the casing, and wherein the orbiting scroll is formed of a material lighter than the frame per unit area.

10. A scroll compressor, comprising:
a casing having an inner space;
a drive motor provided at the inner space of the casing, and configured to generate a rotational force;
a rotational shaft rotated by the drive motor;
an orbiting scroll that performs an orbital motion by being coupled to the rotational shaft;
a fixed scroll that forms a compression space by being coupled to the orbiting scroll;
a discharge cover provided at the inner space of the casing, and having a space that communicates with the compression space while being separated from the inner space of the casing, wherein the space communicates with a motor space and an oil separation space, respectively;
one of more discharge hole provided at a side surface of the discharge cover; and
a discharge pipe is provided that communicates with the oil separation space, wherein the discharge pipe communicates the one or more discharge hole such that a central longitudinal axis of the discharge pipe is substantially perpendicular to a central longitudinal axis of the one or more discharge hole, wherein an outlet that provides communication between the compression space and the oil separation space of the casing is formed a the fixed scroll, wherein a plurality of communication holes that communicates the oil separation space with the motor space is formed at one side of the outlet, wherein the discharge cover is fixed to one side surface of the fixed scroll, such that the discharge cover accommodates therein the outlet and least one of the communication holes for communication between the space of the discharge cover and the outlet and at least one of the communication hole is formed at the discharge cover such that the space of the discharge cover communicates with the oil separation space of the casing, and wherein a summation of a total section area of the one or more discharge hole is larger than a sectional area of the at least one of the communication holes accommodated in the discharge cover.

11. The scroll compressor of claim 10 , wherein a ratio (B/A) between the summation of the total sectional area (B) of the one or more discharge hole and a sectional area (A) of the at least one of the communication holes is within a range of 1.0˜1.5.

12. The scroll compressor of claim 11 , wherein a sectional area (C) of a flow path inside of the discharge pipe is equal to or larger than a total sectional area (A+B) between the sectional area (A) of the at least one of the communication holes and the total sectional area (B) of the one or inure discharge hole.

13. A scroll compressor, comprising:
a compression space formed by a fixed scroll and an orbiting scroll engaged with each other at an inner space of a casing;
a discharge space that communicates with the compression space and formed by a discharge cover provided at the fixed scroll;
a motor space having a drive motor provided at the inner space of the casing so as to transmit a rotational force to the orbiting scroll, the motor space communicating with the discharge space through a first communication hole provided at the fixed scroll; and
an oil separation space formed by the discharge cover, an upper surface of the fixed scroll, and an inner side surface of the casing, the oil separation space communicating with the discharge space through one or more discharge hole provided at the discharge cover and with a discharge pipe, wherein an outer circumferential

Assignees

• Lg Electronics Inc

Inventors

• Lee Jaeha
• Oh Junchul
• Choi Seheon
• Lee Byeongchul

Classifications

• F04C18/0215

  where only one member is moving · CPC title

• F05C2201/021

  Aluminium · CPC title

• F04C2210/206

  Oil · CPC title

• F04C29/026 Primary

  Lubricant separation · CPC title

• F04C2240/30

  Casings or housings · CPC title