Refrigeration machine and method for operating a refrigeration machine

A technology for refrigerators and refrigerants, applied in refrigerators, refrigeration components, refrigeration and liquefaction, etc., can solve problems such as damage, mechanical wear of compressors, weakening the economy of heat pumps, etc., to improve economy and reduce freezing. dangerous effect

Active Publication Date: 2007-06-27
EMERSON ELECTRIC GMBH & CO OHG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The problem with known heat pumps is that under certain operating conditions, for example at particularly low outside temperatures, the temperature of the evaporated refrigerant reaches rather high values ​​at the outlet of the compressor, i.e. destroys the compressor oil in (e.g. lubricating oil) and / or causing mechanical wear on the compressor
[0005] Turning off the heat pump to avoid an increased end-of-compression temperature at the compressor outlet, and turning off the heat pump or switching the switching valve for evaporator defrosting are all related to the downtime of the heat pump, which weakens the economy of the heat pump

Method used

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  • Refrigeration machine and method for operating a refrigeration machine
  • Refrigeration machine and method for operating a refrigeration machine
  • Refrigeration machine and method for operating a refrigeration machine

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Embodiment Construction

[0036] The refrigerating machine according to the invention shown in FIG. 1 , described here as a heat pump, comprises a closed circuit 10 with a refrigerant. An evaporator 12 , a compressor 14 , a condenser 16 and an electrically driven expansion valve 18 are arranged in succession in the refrigerant circuit 10 .

[0037] The evaporator 12 and the compressor 14 are connected to each other via an extraction line 20 . Since the compressor 14 is designed to compress only evaporated refrigerant and may be damaged by inadvertent leakage of liquid refrigerant, a liquid separator 22 in the suction line 20 is provided upstream of the compressor 14, which The liquid separator separates and collects liquid refrigerant that has not been fully evaporated in the evaporator 12 and / or has been liquefied in the extraction line 20 from the refrigerant flow.

[0038]A four-way switching valve 24 in the extraction line 20 is arranged upstream of the liquid separator 22 , and the four-way switc...

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PUM

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Abstract

The invention relates to a refrigeration machine, particularly a heat pump, comprising a closed circuit, which contains a coolant and in which an evaporator, a compressor, a condenser and an, in particular, electrically operated expansion valve are arranged one after the other. The refrigeration machine also comprises an overheating control unit for at least intermittently regulating the temperature of the coolant in the area of the compressor, particularly the compression final temperature. The invention also relates to a method for operating a refrigeration machine of the aforementioned type.

Description

technical field [0001] The invention relates to a refrigerating machine, in particular a heat pump, comprising a closed loop with a refrigerant, in which are arranged in sequence: an evaporator, a compressor, a condenser and in particular an electrically driven expansion valve . Furthermore, the invention relates to a method for operating the refrigerator. Background technique [0002] Refrigerators of the type mentioned at the outset are basically known. The refrigerant evaporates in the evaporator and superheats it, that is, exceeds its saturation temperature. Superheating of the refrigerant also means that, at a constant pressure, the refrigerant temperature exceeds its saturation temperature. Superheat is defined as the difference between the actual temperature of the refrigerant and the evaporation temperature or saturation temperature of the refrigerant, for example in the region of the outlet of the evaporator. [0003] As a rule, in conventional refrigerators pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B31/00F25B49/02F25B13/00F25B43/00
CPCF25B13/00F25B49/022F25B2700/2106F25B2700/21151F25B31/006F25B2700/1933F25B2600/2501F25B2500/08F25B43/006F25B2600/21
Inventor 阿里·R·内贾德
Owner EMERSON ELECTRIC GMBH & CO OHG
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