Scroll compressor and air conditioner having the same

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.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application claims priority from Korean Patent Application No. 10-2014-0195251 filed Dec. 31, 2014 in the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference in its entirety.BACKGROUND[0002]1. Field[0003]The present disclosure relates to a scroll compressor used in an air conditioner. More particularly, the present disclosure relates to a scroll compressor configured so that a predetermined back pressure is applied to the scroll compressor even when the scroll compressor is operated at a low load during variable operation, and to an air conditioner having the same.[0004]2. Description of the Related Art[0005]A scroll compressor has high efficiency, low vibration, and low noise in comparison with other types of compressors, such as rotary compressors, etc., so scroll compressors have been used in various types of air conditioners. Recently, since the scroll compressor is required to operate...

AI Technical Summary

Benefits of technology

[0008]The present disclosure has been developed in order to overcome the above drawbacks and other problems associated with the conventional arrangement. An aspect of the present disclosure relates to a scroll compressor which can maintain constant back pressure in a back pressure chamber so as to maximize efficiency of the scroll compressor even when an operating condition of an air conditioner in which the scroll compressor is disposed is changed, and to an air conditioner having the same.

[0009]Another aspect of the present disclosure relates to a scroll compressor which can keep an amount of oil supplied to a compression chamber constant even when an operating condition of an air conditioner, in which the scroll compressor is disposed, is changed, and to an air conditioner having the same.

[0015]When the drive motor is rotated at a low speed, the flow control valve may increase 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.

[0022]When the drive motor is rotated at a low speed, the flow control valve may increase 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.

[0027]When the drive motor is rotated at a low speed, the flow control valve may increase an amount of oil passing through the oil feed passage.

Problems solved by technology

Accordingly, in the case in which the scroll compressor is designed so that back pressure capable of axial sealing is generated at a maximum load condition, then at a low load condition, the back pressure is lowered so that the axial sealing of the scroll compressor is not properly performed.

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