Refrigeration machine and method for operating refrigeration machine

Abstract

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 An expansion valve, and the heat pump also has a superheat regulating unit for at least intermittently regulating the temperature of the refrigerant in the region of the compressor, in particular the end-of-compression temperature. Furthermore, the invention also relates to a method for operating a refrigerator of the aforementioned type.

Description

Technical field

[0001] The present invention relates to a refrigerator, in particular a heat pump, which includes a closed loop with refrigerant, in which an evaporator, a compressor, a condenser and a special electrically driven expansion valve are arranged in sequence . In addition, the present invention also relates to a method for operating the refrigerator. Background technique

[0002] Refrigerators of the type mentioned at the beginning are basically well known. The refrigerant evaporates in the evaporator and superheats it, that is, exceeds its saturation temperature. The superheating of the refrigerant also means that, at a constant pressure, the temperature of the refrigerant exceeds its saturation temperature. Overheating is defined as, for example, the difference between the actual temperature of the refrigerant in the exit area of ​​the evaporator and the evaporation temperature or saturation temperature of the refrigerant.

[0003] Generally, a predetermined value...

Examples

Embodiment Construction

[0036] figure 1 The refrigerator according to the present invention shown in and described here as a function of a heat pump includes a closed loop 10 with a refrigerant. In the refrigerant circuit 10, an evaporator 12, a compressor 14, a condenser 16, and an electrically driven expansion valve 18 are sequentially provided.

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

[0038] The four-way switching valve 24 in the suction line 20 is provided upstream of the liquid separator 22, and the four...

Technical field

[0001] The present invention relates to a refrigerator, in particular a heat pump, which includes a closed loop with refrigerant, in which an evaporator, a compressor, a condenser and a special electrically driven expansion valve are arranged in sequence . In addition, the present invention also relates to a method for operating the refrigerator. Background technique

[0002] Refrigerators of the type mentioned at the beginning are basically well known. The refrigerant evaporates in the evaporator and superheats it, that is, exceeds its saturation temperature. The superheating of the refrigerant also means that, at a constant pressure, the temperature of the refrigerant exceeds its saturation temperature. Overheating is defined as, for example, the difference between the actual temperature of the refrigerant in the exit area of ​​the evaporator and the evaporation temperature or saturation temperature of the refrigerant.

[0003] Generally, a predetermined value...

Examples

Embodiment Construction

[0036] figure 1 The refrigerator according to the present invention shown in and described here as a function of a heat pump includes a closed loop 10 with a refrigerant. In the refrigerant circuit 10, an evaporator 12, a compressor 14, a condenser 16, and an electrically driven expansion valve 18 are sequentially provided.

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

[0038] The four-way switching valve 24 in the suction line 20 is provided upstream of the liquid separator 22, and the four...

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