Testing device for detecting and controlling lubricating oil circulation rate of refrigerating system

Abstract

The invention relates to a testing device for detecting and controlling the lubricating oil circulation rate of a refrigerating system, which belongs to the technical field of refrigeration. The testiThe invention relates to a testing device for detecting and controlling the lubricating oil circulation rate of a refrigerating system, which belongs to the technical field of refrigeration. The testi a throttle mechanism and other parts and components under the conditions with different lubricating oil circulation rates according to different test purposes, thereby obtaining a curve showing thar, a throttle mechanism and other parts and components under the conditions with different lubricating oil circulation rates according to different test purposes, thereby obtaining a curve showing that the performances of the refrigerating system and all parts and components attenuate along with the increment of the lubricating oil circulation rate.t the performances of the refrigerating system and all parts and components attenuate along with the increment of the lubricating oil circulation rate.ng device adopts two oil separators to completely separate out lubricating oil from a mixture of a refrigerant and the lubricating oil discharged by a compressor, only allows the refrigerant to enterng device adopts two oil separators to completely separate out lubricating oil from a mixture of a refrigerant and the lubricating oil discharged by a compressor, only allows the refrigerant to entera condenser while storing the lubricating oil in an oil storage tank; and then the lubricating oil is pumped into a refrigerant pipeline at the inlet end of the condenser by an oil pump from the oil sa condenser while storing the lubricating oil in an oil storage tank; and then the lubricating oil is pumped into a refrigerant pipeline at the inlet end of the condenser by an oil pump from the oil storage tank, and the quantity of the lubricating oil pumped into the refrigerant pipeline is precisely controlled by a hand-operated pin valve. The testing device achieves the aim of controlling and mtorage tank, and the quantity of the lubricating oil pumped into the refrigerant pipeline is precisely controlled by a hand-operated pin valve. The testing device achieves the aim of controlling and measuring the lubricating oil circulation rate of the refrigerating system; and simultaneously, the testing device can detect the performances of the refrigerating system or an evaporator, the condenseeasuring the lubricating oil circulation rate of the refrigerating system; and simultaneously, the testing device can detect the performances of the refrigerating system or an evaporator, the condenser,

Description

technical field [0001] The invention relates to a test device in the technical field of refrigeration, in particular to a test device for detecting and controlling the circulation rate of lubricating oil in a refrigeration system. Background technique [0002] The lubricating oil circulation rate in the refrigeration system not only plays an important role in the normal operation of the refrigeration compressor, but also affects the performance of the condenser, evaporator, throttling mechanism and other components in the refrigeration system. The inner surface of the heat transfer tube of the condenser and evaporator forms an oil film, so that its heat transfer performance is seriously affected. Therefore, it is necessary to study a test device that can accurately control the lubricating oil circulation rate in the refrigeration system and test the influence of the lubricating oil circulation rate on the performance of the refrigeration system and its components. [0003] ...

AI Technical Summary

Problems solved by technology

[0003] Most of the existing refrigeration system performance testing test benches are not equipped with special devices that can accurately measure and control the lubricating oil circulation rate of the refrigeration system, so these test benches can only measure the mixture of refrigerant and lubricating oil circulating in the system. The total mass of the lubricating oil cannot be measured. Since the lubricating oil circulation rate of the tested refrigeration system fluctuates greatly during operation, the performance of the refrigeration system and various components will vary with the fluctuation of the lubricating oil circulation rate. Changes, resulting in large test deviations, directly affect the test bench test accuracy and test repeatability

[0004] Through literature retrieval of prior art, it is found that Zhang Huajun et al published "Experimental Research on Air-conditioning and Refrigeration System of Medium-sized Passenger Cars" on the 19th page of the 5th issue of "Refrigeration, Air Conditioning and Electric Machinery" in 2007, in which a method for testing The test bench and test method for the performance of large and medium-sized passenger car air-conditioning systems. This test device tests and analyzes the quantitative effects of changes in compressor speed, evaporator air volume, condenser air volume, and ambient temperature on system performance. The test device is not equipped with a device to detect and control the amount of lubricating oil circulation in the refrigeration system, so it is impossible to test and analyze the quantitative impact of changes in the amount of lubricating oil circulation on system performance. The lubricating oil circulation rate fluctuates greatly during the test process, which may lead to large test deviations and affect the reliability of the test results

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