Freezing apparatus, and expander

A technology of refrigeration device and expansion mechanism, which is applied in refrigerators, safety devices, gas cycle refrigerators, etc., and can solve the problems of low recovery efficiency
CN101548066BActive Publication Date: 2011-05-04DAIKIN IND LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
DAIKIN IND LTD
Publication Date
2011-05-04

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Abstract

Provided is a freezing apparatus, which is constituted to make the inlet quantity of a coolant of an expansion mechanism variable while recovering the energy of a high-pressure coolant as a power to the maximum by the expansion mechanism. The expansion mechanism (50) is equipped with two rotary mechanism units (70 and 80) having displacements made different from each other. These rotary mechanismunits are connected in series, and the rotary mechanism unit of the smaller displacement has two inlet ports (55 and 56) formed in its cylinder (71). Inlet pipes (24 and 27), as connected to the inlet ports (55 and 56), are equipped with a front throttle valve (60) and a switch valve (61). A bypass pipe (65) for bypassing the expansion mechanism (50) is equipped with a bypass valve (66). These valves (60, 61 and 66) are controlled to attain a balance between the coolant circulation rate of the expansion mechanism (50) and the coolant circulation rate of a compression mechanism (40).
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Description

technical field

[0001] The present invention relates to a refrigeration device including an expansion mechanism, in particular to a volumetric expansion mechanism that generates power from the expansion of fluid. Background technique

[0002] Conventionally, as disclosed in Patent Documents 1 and 2, in a refrigerant circuit that performs a refrigerating cycle, a refrigeration device is known that includes an expansion mechanism for recovering power from refrigerant together with a compression mechanism. The power recovered from the high-pressure refrigerant by the expansion mechanism is transmitted to the connected compression mechanism through the drive shaft, and is used to drive the compression mechanism.

[0003] However, since the refrigerant circuit is a closed circuit, the amount of refrigerant circulating through the compression mechanism per unit time (equivalent to mass flow, the same below) must always be consistent with the amount of refrigerant circulating throu...

Claims

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