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Perhaps you recall learning in chemistry class that changes in pressure can bring about changes in energy. Well, that is the theory behind the compressor pump. It compresses or pressurizes fluid and thus reduces the heat energy in that chemical. The makers of air conditioning equipment often rely on the cooling properties of the scroll compressor.
The original version of the scroll pump has one fixed and one orbiting scroll. That latter component traps and compresses pockets of fluid. That fluid could be a liquid or a gas. The air compressor traps atmospheric air and puts in under pressure.
Yet not all compressor pumps trap and compress the same fluid. Moreover not all such pumps have the same number of moving parts. Adaptations to the original design led to the creation of co-rotating scrolls. In those devices two scroll like structures move in a synchronous motion, but they have offset centers of rotation.
The scroll compressor demonstrates a higher level of efficiency than the reciprocating equipment, the equipment that it has begun to replace. It does not cause the throttling losses that can reduce a machine’s efficiency. By the same token, it has been shown to have an greater reliability. That increased reliability stems from the presence of only a few moving parts.
The scroll pump has no suction valve. The absence of that valve has allowed the scroll pump to become an important component within the supercharger, the occasional addition to the car engine. The scroll vacuum pump takes in some extra air whenever an added injection of fuel takes place.
While all scroll compressors lack a suction valve, some do have a discharge valve. The exact number and positioning of the parts in any one of these devices reflects the function that it is intended to carry out. Not every scroll get placed in an air conditioner or a supercharger. Some are used in vacuum pumps or a compressor pump.