Refrigeration cycle device and refrigerant circulation method

A technology of refrigerant cycle and refrigeration cycle, applied in refrigerators, refrigeration components, refrigeration and liquefaction, etc., can solve problems such as parts damage, oil exhaustion, and reduction in the return of refrigeration oil.
CN102869930AInactive Publication Date: 2013-01-09MITSUBISHI ELECTRIC CORP
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
MITSUBISHI ELECTRIC CORP
Publication Date
2013-01-09
Estimated Expiration
Not applicable ยท inactive patent

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Abstract

Disclosed is a refrigeration cycle device that is capable of reliably returning refrigerating machine oil to a compressor without being limited by the miscibility or immiscibility of the oil with a refrigerant. The refrigeration cycle device (1010) is equipped with: a first refrigerant course in which the compressor (101), a condenser (103), a first flow control valve (104), a refrigerant storage container (105), a second flow control valve (106), and a first evaporator (107) are connected in that order by piping and in which the refrigerant exit of the first evaporator (107) is connected to the suctioned refrigerant inlet (1092) of an ejector (109) by piping; a second refrigerant course in which the compressor (101) and a second evaporator (110) are connected in that order by piping and in which the refrigerant entrance of the second evaporator (110) is connected to the mixed refrigerant outlet (1093) of the ejector (109) by piping; and a third refrigerant course that diverges from the middle of the piping connecting the refrigerant exit of the condenser (103) and the first flow control valve (104) and in which a third flow control valve (108) and the driving refrigerant inlet (1091) of the ejector (109) are connected in that order by piping.
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Description

technical field

[0001] The present invention relates to a refrigeration cycle device with an ejector. For example, the present invention provides a highly reliable refrigerating cycle device that can avoid shaft burns due to depletion of refrigerating machine oil in the compressor housing. Background technique

[0002] As a conventional refrigeration cycle device with an ejector, in Patent Document 1, an oil return hole is provided on the bottom side of the gas-liquid separator provided at the outlet of the ejector, and a pipe is provided to connect the oil return hole to the compressor. Bypass circuit for suction connection.

[0003] With such a structure, the refrigerating machine oil accumulated at the bottom of the accumulator can be returned to the compressor, so that the compressor can be prevented from being burned.

[0004] Patent Document 1: Japanese Unexamined Patent Application Publication No. 2002-130874 (Claim 1, FIG. 1 )

[0005] In conventional examples, wh...

Claims

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