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

The present disclosure relates to a scroll compressor that can maintain a constant back pressure in a back pressure chamber, even when the operating condition of an air conditioner in which the scroll compressor is disposed changes. This ensures maximum efficiency of the scroll compressor. Additionally, the scroll compressor can maintain a constant amount of oil supplied to a compression chamber, regardless of changes in the operating condition of the air conditioner. This ensures optimal performance of the air conditioner. The flow control valve may increase the amount of oil passing through the oil feed passage to achieve a back pressure of the back pressure chamber, which is a value between the suction pressure and the discharge pressure, at a low speed of the drive motor. This allows for precise control of back pressure and ensures a stable operation of the scroll compressor.

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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