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Method for switching compressor capacity

A compressor capacity, compressor technology, applied in compressors, irreversible cycle compressors, refrigerators, etc.

Active Publication Date: 2020-07-24
DANFOSS AS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this solution resulted in a high amount of unused compressor capacity

Method used

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  • Method for switching compressor capacity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0062] figure 1 is a diagrammatic view of a vapor compression system 1 according to an embodiment of the invention. The vapor compression system 1 comprises a compressor unit 2 arranged in a refrigerant path, two heat recovery heat exchangers 3a and 3b, a heat rejection heat exchanger 4, an ejector 5, a high pressure valve 6, a receiver 7, and a or multiple evaporator units (not shown). Each evaporator unit comprises an evaporator and an expansion device arranged to control the supply of refrigerant to the evaporator.

[0063] The compression unit 2 comprises a plurality of compressors 8, 9, 10, four of which are shown. One of these compressors 8 is permanently connected to a high pressure suction line 11 interconnecting the gas outlet 12 of the receiver 7 with the compressor unit 2 . The other of these compressors 9 is permanently connected to a medium pressure suction line 13 interconnecting the outlet of the evaporator unit with the compressor unit 2 . The last two comp...

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Abstract

A method for operating a compressor unit (2) comprising one or more compressors (8, 9, 10) arranged in a vapor compression system (1) is disclosed. Two or more options are defined for distributing the available compressor capacity of the compressor unit (2) between being connected to the high pressure suction line (11) and being connected to the medium pressure suction line (13). For each option, the expected impact on one or more operating parameters of the vapor compression system (1) resulting from allocating the available compressor capacity according to the option is predicted. An option is selected based on the predicted expected impact on the options and based on the current operating requirements of the vapor compression system (1), and distribution is made according to the selected option, for example by means of one or more valve arrangements (14, 15) The available compressor capacity.

Description

technical field [0001] The invention relates to a method for operating a compressor unit comprising one or more compressors, the compressor unit being arranged in a vapor compression system. According to the method of the invention, the compressor unit is operated to switch the available compressor capacity between being connected to the high pressure suction line and being connected to the medium pressure suction line. The invention also relates to a vapor compression system comprising a switchable compressor unit. Background technique [0002] In some refrigeration systems, high pressure valves and / or ejectors are arranged in the refrigerant path at a downstream location relative to the heat rejection heat exchanger. Thereby, the refrigerant leaving the heat rejection heat exchanger passes through the high pressure valve or ejector and thereby reduces the pressure of the refrigerant. Furthermore, due to the expansion that occurs in the high pressure valve or ejector, the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B1/10F25B9/08F25B41/04
CPCF25B9/08F25B2341/0012F25B2400/23F25B2600/2519F25B1/10F25B41/39F25B41/20F25B41/385F25B2600/2523F25B2600/2507F25B2500/19F25B2400/16F25B2500/18
Inventor 克里斯蒂安·弗雷德斯隆德扬·普林斯肯内思·班克·马德森弗雷德·施密特
Owner DANFOSS AS