Rotary expansion machine and fluid machinery

An expander and rotary technology, applied in the field of expander and fluid machinery, can solve the problems of large vibration and noise, pipeline fluid pulsation, pipeline damage, etc.
CN1833093AInactive Publication Date: 2006-09-13DAIKIN IND LTD
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Patent Information

Authority / Receiving Office
CN ยท China
Current Assignee / Owner
DAIKIN IND LTD
Publication Date
2006-09-13
Estimated Expiration
Not applicable ยท inactive patent

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Abstract

The invention discloses a rotary type expander and a fluid machinery. The rotary type expander (60) is provided with two rotary mechanism parts (70, 80). These two rotary mechanism parts (70, 80) differ from each other in displacement volume. The outflow side of the first rotary mechanism part (70) of small displacement volume is fluidly connected to the inflow side of the second rotary mechanism part (80) of large displacement volume. In addition, the process in which the volume of a first low-pressure chamber (74) in the first rotary mechanism part (70) decreases is in synch with the process in which the volume of a second high-pressure chamber (83) in the second rotary mechanism part (80) increases. Refrigerant at high pressure is first introduced into a first high-pressure chamber (73) of the first rotary mechanism part (70). Thereafter, this high-pressure refrigerant passes through a communicating passage (64) and then flows by way of the first low-pressure chamber (74) into the second high-pressure chamber (83) while expanding. The after-expansion refrigerant flows out to an outflow port (35) from a second low-pressure chamber (84) of the second rotary mechanism part (80).
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Description

technical field

[0001] The present invention relates to an expander generating power by expansion of a high-pressure fluid and a fluid machine having the expander. Background technique

[0002] Conventionally, a so-called rotary fluid machine has been known and widely used as a compressor for compressing a refrigerant in a refrigeration device. On the other hand, in the refrigerating apparatus disclosed in JP-A-2000-234814, an expander as an expansion mechanism is provided in a refrigerant circuit, and power recovery is performed from a refrigerant that is a high-pressure fluid in a supercritical state. The above-mentioned rotary fluid machine can also be used as such an expander for power recovery. At this time, the high-pressure fluid can be introduced into the rotary fluid machine as the expander, and the power can be obtained through the expansion of the high-pressure fluid. The power thus recovered in the expander is used to drive the compressor.

[0003] The operati...

Claims

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