Centrifugal Refrigeration Compressor Superheating Zone Closed Cycle Test Device and Test Method

Abstract

The invention belongs to the technical field of refrigeration compressor performance tests, and concretely relates to a centrifugal type refrigeration compressor overheating area closed type circulation test device and a test method thereof. The device at least comprises a model machine closed type circulation module, a refrigerating fluid cooling module and a refrigerant recovering and filling module. The model machine closed type circulation module comprises a first oil separator, a first gas cooler, a first adjusting valve and a second gas cooler. According to the device, a refrigerating fluid can be still at an overheating gas state in a circulation system, and an active control function under the condition of any gas absorption temperature can be realized on an inlet of a compressor to be tested, so that the service life and the operation safety of the whole device are ensured, and meanwhile, the convenience in operation can be ensured. The invention additionally aims to provide the test method applying the device. The test method comprises the steps of filling a refrigerant, separating oil and gas, carrying out gas cooling for the first time, carrying out gas throttling, andcarrying out gas cooling for the second time. The method can efficiently and quickly achieve the aim of testing a performance of a centrifugal type refrigeration compressor.

Description

technical field [0001] The invention belongs to the technical field of performance testing of refrigeration compressors, and in particular relates to a closed cycle testing device and a testing method for a superheating zone of a centrifugal refrigeration compressor. Background technique [0002] The centrifugal refrigeration compressor has a large cooling capacity and high efficiency, and is the core component of the refrigeration system. Its operating superheat is generally between 2 and 5K. There are usually two options for performance testing of centrifugal refrigeration compressors: the first option is based on the standard test method specified in JB / T 12843-2016, which has a lot of equipment, complicated processes, and expensive construction costs. The operation and maintenance costs are high, and the control and adjustment are often difficult, so they are used less. The second solution is to condense the high-temperature and high-pressure refrigerant at the discharg...

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Problems solved by technology

Although the above-mentioned second test method is widely used, there are still the following problems: since the second test method generally uses a single condenser for rapid condensation of refrigerant, under the effect of rapid condensation, the above-mentioned refrigerant will directly transform into vapor Liquid two-phase state, this will greatly reduce the service life of the regulator inlet of the compressor connected to it, and the refrigerant in the vapor-liquid two-phase state is obviously not conducive to regulation; on the other hand, the compressor will also be in the suction zone The dangerous situation of liquid operation is obviously not conducive to safety testing

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