JP2015086704A5 - - Google Patents

Claims (7)

In a scroll compressor configured by storing a compression mechanism unit configured by combining a fixed scroll and a turning scroll with each other, and an electric motor unit for driving the compression mechanism unit in a sealed container,
A liquid injection mechanism for injecting liquid refrigerant into a compression chamber formed by the fixed scroll and the orbiting scroll;
A release valve mechanism for releasing the overcompressed gas refrigerant in the compression chamber from the compression chamber to the discharge pressure space in the sealed container when the pressure in the compression chamber is higher than the discharge pressure. And
Wherein the compression chamber side of the flow path in the liquid injection mechanism, the compression chamber side of the channel in the release valve mechanism, the compression chamber is shared with each other by the co port formed in the base plate of the fixed scroll Open and
The liquid injection mechanism includes a liquid injection pipe that penetrates the sealed container, and an injection flow path that connects the liquid injection pipe and the common port and is provided on the base plate of the fixed scroll.
The release valve mechanism includes a release flow path extending in an outer diameter direction from the shared port in the fixed scroll base plate, and valve means for opening and closing the release flow path in the fixed scroll base plate. Scroll compressor.   2. The scroll compressor according to claim 1, wherein the valve means for opening and closing the release flow path is formed in the fixed scroll base plate and communicates the release flow path and the discharge pressure space in the sealed container. A release valve arrangement space for arranging the release valve plate, a release valve plate provided in the release valve arrangement space for opening and closing the release flow path, an elastic body for pressing the release valve plate, and positioning the elastic body A scroll compressor comprising a release flow path forming stopper to be held. The scroll compressor according to claim 2, wherein the release valve mechanism opens the release valve plate when the pressure in the compression chamber becomes higher than the discharge pressure space in the sealed container, A scroll compressor configured to release a gas refrigerant into the discharge pressure space.   2. The scroll compressor according to claim 1, wherein the valve means for opening and closing the release flow path includes a reed valve for opening and closing the release flow path, a retainer for limiting an operating range of the reed valve, the reed valve, A scroll compressor comprising a bolt for fixing a retainer to a base plate of a fixed scroll.   5. The scroll compressor according to claim 4, wherein the reed valve and the retainer are fixed to a surface of the base plate of the fixed scroll opposite to the wrap by a bolt, and the pressure in the compression chamber is higher than the discharge pressure space of the sealed space. The scroll compressor is configured so that, when it becomes high, the reed valve is pushed up to the retainer side to release the gas refrigerant in the compression chamber to the discharge pressure space.   2. The scroll compressor according to claim 1, wherein the liquid injection mechanism applies a back flow from the compression chamber side to the liquid injection pipe side in a portion of the injection flow path between the liquid injection pipe and the common port. The check valve mechanism is provided with a liquid injection flow path forming stopper, an elastic body, a valve plate, and a valve seal stopper provided in order from the shared port side. Scroll compressor.   2. The scroll compressor according to claim 1, wherein the scroll compressor is used as a refrigerant compressor of a refrigeration cycle apparatus in which an R32 single refrigerant or a mixed refrigerant containing 70% or more of R32 is used as a refrigerant. Scroll compressor.