Scroll compressor and air conditioner having the same

Patent metadata

Field	Value
Publication number	US-2016186754-A1
Application number	US-201514960723-A
Country	US
Kind code	A1
Filing date	Dec 7, 2015
Priority date	Dec 31, 2014
Publication date	Jun 30, 2016
Grant date	—

Abstract

A scroll compressor includes a casing, a drive motor, an orbiting scroll, a fixed scroll engaged with the orbiting scroll, a back pressure chamber proximate to the orbiting scroll, an inlet pipe for supplying refrigerant to a compression chamber formed by the orbiting scroll and the fixed scroll, and a discharge pipe for discharging the refrigerant discharged from the compression chamber. The scroll compressor includes an oil feed passage configured to connect the back pressure chamber and an oil storage tank provided in the casing so that oil of the oil storage tank is supplied to the back pressure chamber; and a flow control valve disposed in the oil feed passage and configured to control an amount of oil to be supplied to the back pressure chamber via the oil feed passage according to a suction pressure, a discharge pressure, and a rotational velocity.

First claim

What is claimed is:

1 . A scroll compressor which comprises a casing, a drive motor accommodated in the casing, an orbiting scroll to be rotated by the drive motor, a fixed scroll engaged with the orbiting scroll, a back pressure chamber provided proximate to the orbiting scroll, an inlet pipe that is disposed in the casing and supplies refrigerant to a compression chamber formed by the orbiting scroll and the fixed scroll, and a discharge pipe that is disposed in the casing and discharges the refrigerant discharged from the compression chamber outside the casing, the scroll compressor comprising:
an oil feed passage configured to connect the back pressure chamber and an oil storage tank provided in the casing so that oil of the oil storage tank is supplied to the back pressure chamber; and a flow control valve disposed in the oil feed passage, the flow control valve configured to control an amount of oil to be supplied to the back pressure chamber via the oil feed passage, wherein the flow control valve controls the amount of oil to be supplied via the oil feed passage in accordance with a suction pressure of the refrigerant to be sucked through the inlet pipe, a discharge pressure of the refrigerant to be discharged through the discharge pipe, and a rotational velocity of the drive motor.

2 . The scroll compressor of claim 1 , wherein
the flow control valve is configured to control an opening area of the oil feed passage.

3 . The scroll compressor of claim 1 , wherein
the scroll compressor is disposed in an outdoor unit of an air conditioner, and the flow control valve is controlled by a controller of the air conditioner.

4 . The scroll compressor of claim 1 , further comprising:
a main frame configured to support the orbiting scroll and provided with the back pressure chamber, wherein the main frame is provided with an oil feed hole connected to a discharge end of the oil feed passage.

5 . The scroll compressor of claim 4 , wherein the oil feed hole comprises:
a vertical hole which is connected to the back pressure chamber and is parallel to a drive shaft of the drive motor; and a horizontal hole which is formed perpendicular to the vertical hole and is connected to the discharge end of the oil feed passage.

6 . The scroll compressor of claim 1 , wherein,
when the drive motor is rotated at a low speed, the flow control valve increases an amount of oil passing through the oil feed passage so that a back pressure of the back pressure chamber is a value between the suction pressure and the discharge pressure.

7 . The scroll compressor of claim 1 , wherein,
when the discharge pressure of the scroll compressor is maximum, the flow control valve cuts off the oil feed passage.

8 . A scroll compressor which comprises a casing, a drive motor accommodated in the casing, an orbiting scroll to be rotated by the drive motor, a fixed scroll engaged with the orbiting scroll, a back pressure chamber proximate to the orbiting scroll, an inlet pipe that is disposed in the casing and supplies refrigerant to a compression chamber formed by the orbiting scroll and the fixed scroll, a discharge pipe that is disposed in the casing and discharges the refrigerant discharged from the compression chamber outside the casing, and an oil separator that is connected to the discharge pipe, and separates and collects oil from the discharged refrigerant, the scroll compressor comprising:
an oil feed passage configured to connect the oil separator and the back pressure chamber so that oil collected in the oil separator is supplied to the back pressure chamber; and a flow control valve disposed in the oil feed passage, the flow control valve configured to control an amount of oil to be supplied to the back pressure chamber via the oil feed passage, wherein the flow control valve controls the amount of oil to be supplied via the oil feed passage in accordance with a suction pressure of the refrigerant to be sucked through the inlet pipe, a discharge pressure of the refrigerant to be discharged through the discharge pipe, and a rotational velocity of the drive motor.

9 . The scroll compressor of claim 8 , wherein
the flow control valve is configured to control an opening area of the oil feed passage.

10 . The scroll compressor of claim 8 , wherein
the scroll compressor is disposed in an outdoor unit of an air conditioner, and the flow control valve is controlled by a controller of the air conditioner.

11 . The scroll compressor of claim 8 , further comprising:
a main frame configured to support the orbiting scroll and provided with the back pressure chamber, wherein the main frame is provided with an oil feed hole connected to a discharge end of the oil feed passage.

12 . The scroll compressor of claim 11 , wherein the oil feed hole comprises:
a vertical hole which is connected to the back pressure chamber and is parallel to a drive shaft of the drive motor; and a horizontal hole which is formed perpendicular to the vertical hole and is connected to the discharge end of the oil feed passage.

13 . The scroll compressor of claim 8 , wherein,
when the drive motor is rotated at a low speed, the flow control valve increases an amount of oil passing through the oil feed passage so that a back pressure of the back pressure chamber is a value between the suction pressure and the discharge pressure.

14 . The scroll compressor of claim 8 , wherein,
when the discharge pressure of the scroll compressor is maximum, the flow control valve cuts off the oil feed passage.

15 . A scroll compressor which comprises a casing, a drive motor accommodated in the casing, an orbiting scroll to be rotated by the drive motor, a fixed scroll engaged with the orbiting scroll, a back pressure chamber proximate to the orbiting scroll, an inlet pipe that is disposed in the casing and supplies refrigerant to a compression chamber formed by the orbiting scroll and the fixed scroll, and a discharge pipe that is disposed in the casing and discharges the refrigerant discharged from the compression chamber outside the casing, the scroll compressor comprising:
an oil feed passage configured to connect the compression chamber and an oil storage tank provided in the casing so that oil of the oil storage tank is supplied to the compression chamber; and a flow control valve disposed in the oil feed passage, the flow control valve configured to control an amount of oil to be supplied to the compression chamber via the oil feed passage, wherein the flow control valve controls the amount of oil to be supplied via the oil feed passage in accordance with a suction pressure of the refrigerant to be sucked through the inlet pipe, a discharge pressure of the refrigerant to be discharged through the discharge pipe, and a rotational velocity of the drive motor.

16 . The scroll compressor of claim 15 , wherein
the fixed scroll comprises an auxiliary oil feed hole connecting the compression chamber and a discharge end of the oil feed passage.

17 . The scroll compressor of claim 15 , wherein
the scroll compressor is disposed in an outdoor unit of an air conditioner, and the flow control valve is controlled by a controller of the air conditioner.

18 . The scroll compressor of claim 15 , wherein,
when the drive motor is rotated at a low speed, the flow control valve increases an amount of oil passing through the oil feed passage.

19 . A scroll compressor which comprises a casing, a drive motor accommodated in the casing, an orbiting scroll to

Assignees

• Samsung Electronics Co Ltd

Inventors

• Cho Yang-Hee
• Oh Sung-Kwang

Classifications

• F04C18/0215 Primary

  where only one member is moving · CPC title

• F04C29/023

  Lubricant distribution through a hollow driving shaft (F04C29/025 takes precedence) · CPC title

• F04C29/021 Primary

  Control systems for the circulation of the lubricant · CPC title

• F04C29/0085

  Prime movers · CPC title

• F04C23/008

  Hermetic pumps · CPC title