Scroll compressor

Abstract

The present invention relates to a scroll compressor. The scroll compressor is configured to have a discharge outlet (113) of a fixed scroll (110) and a discharge guide groove of an orbiting scroll (120) for med in non-circular shapes such as a heart shape. Accordingly, it is capable of preventing a refrigerant from being incompletely or excessively compressed without additional bypass valves, thereby being capable of reducing a fabrication cost of the compressor. And, since it is not required to consider interference by other components at the time of installation of a bypass valve, it is capable of simplifying a fabrication process.

Description

TECHNICAL FIELD[0001]The present invention relates to shapes of a discharge outlet and a discharge guide groove in a scroll compressor.BACKGROUND ART[0002]Generally, a compressor serves to convert mechanical energy into compressive energy of fluid. Compressors may be categorized into a reciprocating type, a rotary type, a vane type and a scroll type according to a compressing mechanism with respect to fluid.[0003]The scroll compressor is provided with a driving motor for generating a driving force and a compression unit for compressing a refrigerant, compressive fluid by receiving the driving force from the driving motor, within a hermetic casing.[0004]The compression unit consists of a fixed scroll fixed at the casing by being provided with a fixed wrap and an orbiting scroll performing an orbiting motion by being provided with an orbiting wrap to be engaged with the fixed wrap. The fixed wrap and the orbiting wrap have the same base circle radius and are formed to have one involut...

AI Technical Summary

Benefits of technology

[0011]The scroll compressor in accordance with the present invention is configured to have the discharge outlet of the fixed scroll and the discharge guide groove of the orbiting scroll formed in non-circular shapes such as a heart shape, thus it is capable of preventing the discharge pressure of the refrigerant from being incomplete or exceeding under a state that the bypass valves are not additionally installed. Accordingly, it is capable of reducing the fabrication cost of the compressor and simplifying the fabrication process because it is not required to consider the interference by other components at the time of installation of the bypass valve.

Problems solved by technology

But, when the two pressure ratios are not equal to each other, the loss increases.

For example, in case that the operating pressure ratio is set to be higher than the designed pressure ratio, a pressure of gas in the compression chambers does not implement the discharge pressure.

Thus, a pressure actually discharged is lower than a pressure needed for loads, which causes a compression incompletion.

On the other hand, in case that the operating pressure ratio is lower than the designed pressure ratio, even though the pressure needed for the load is low, the orbiting wrap does not yet reach the discharge initiation angle at a time that the gas pressure in the compression chambers is equal to the discharge pressure, accordingly the gas is continuously compressed, thereby occurring excessive compression.

However, such bypass device in the related art scroll compressor should be provided with a plurality of bypass valves so as to open / close the bypass holes, accordingly a material cost and the number of assembly processes may increase, thus a fabrication cost may increase.

In this case, the bypass valves may not be installed at desired positions due to interference by positions of the discharge valve or the vacuum state prevention device.

Images