Method and arrangement for defrosting vapor compression system

A compressor and vapor compression technology, applied in the direction of compressors, irreversible cycle compressors, and reversible cycle compressors, etc., can solve the problem of low refrigerant temperature, long defrosting time, and limited transfer to heat accumulators. temperature difference
CN1461400AInactive Publication Date: 2003-12-10SINVENT AS
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SINVENT AS
Publication Date
2003-12-10
Estimated Expiration
Not applicable · inactive patent

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Abstract

Method for defrosting of a heat exchanger (evaporator) in a vapor compression system including, beyond a heat exchanger (evaporator) (3) to be defrosted, at least a compressor (1), a second heat exchanger (condenser / heat rejecter) (2) and an expansion device (6) connected by conduits in an operable manner to form an integral closed circuit. The heat exchanger (3) to be defrosted is subjected to essentially the same pressure as the compressor's (1) discharge pressure whereby the heat exchanger (3) is defrosted as the high-pressure discharge gas from the compressor (1) flows through to the heat exchanger, giving off heat to the said heat exchanger (3).
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Description

technical field

[0001] The invention relates to a defrosting method and device for a heat exchanger (evaporator) in a refrigeration or heat pump system. In addition to the first heat exchanger (evaporator), the system also includes at least one compressor, a second heat exchanger ( thermal suppressor) and an expansion device are operatively connected by piping to form an integral closed circuit. Background technique

[0002] In some applications, such as air source heat pumps or air coolers in refrigeration systems, when the ambient temperature is close to or below the freezing point of water, frost can form on the heat-absorbing heat exchanger (used as an evaporator). Due to the accumulation of frost, the heat transfer performance of the heat exchanger is reduced, and thus the system performance is reduced. Therefore a defrosting device is required. The most conventional defrosting methods are electric defrosting and hot gas defrosting. When the system has two or more ev...

Claims

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