Rotary compressor and refrigeration cycle device

Abstract

The invention discloses a rotary compressor and a refrigeration cycle device. The rotary compressor includes a hermetic casing, a built-in motor and a compression mechanism driven by the motor, a discharge pipe opening a hole in the casing, an air suction pipe connected to the compression mechanism, and a connection to the interior of the casing. The pressure equalizing device connected to the suction pipe, and the liquid reservoir connected to the suction pipe outside the casing and the first check valve device, when the motor stops, the bypass hole of the pressure equalizing device is opened, so The first check valve device is closed, and the gas in the casing flows into the suction pipe or the liquid reservoir. According to the rotary compressor of the present invention, the restart time of the rotary compressor can be greatly shortened, and the APF can be further improved. The pressure equalizing device and the first check valve device are automatically controlled by pressure difference, which is low in cost and high in reliability, and does not require Power control is beneficial to save energy.

Description

technical field [0001] The invention relates to the field of compressors, in particular to a rotary compressor and a refrigeration cycle device. The present invention relates to a technique for greatly reducing the restart time of a rotary compressor that increases the internal pressure of a hermetic casing to a high pressure. Utilizing this technology can improve capacity control and annual energy performance (APF) of air conditioning units and refrigeration units. Background technique [0002] Under conditions such as air-conditioning room temperature control and defrosting operation, the compressor will frequently start and stop repeatedly. However, a problem with the rotary compressor in which the internal pressure of the closed casing is high pressure is that if the casing pressure or discharge pressure is not equal to the suction pressure of the compression chamber, the motor cannot be started. [0003] Therefore, it takes about 4 minutes to restart the compressor af...

AI Technical Summary

Problems solved by technology

However, the problem of the rotary compressor whose internal pressure of the closed shell is high pressure is that if the shell pressure or discharge pressure is not equal to the suction pressure of the compression chamber, the motor cannot be started.

As a result, there will be disadvantages such as the deterioration of the room temperature control of the air conditioner and the increase in the defrosting operation time necessary for heating operation, and these problems will also become the cause of affecting the annual power efficiency (APF)

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