Oil return system of dual-mode fluorine pump refrigerating device, control method of oil return system and machine room air conditioner

Abstract

The invention discloses an oil return system of a dual-mode fluorine pump refrigeration device, a control method of the oil return system and a machine room air conditioner, and the system comprises a balance assembly which is arranged between a liquid storage tank and an oil collection tank; the oil suction assembly is arranged in the liquid storage tank and used for floating on the layered lubricating oil layer in the liquid storage tank and sucking the lubricating oil; the oil collection assembly is arranged between the liquid storage tank and the oil collection tank and used for collecting the lubricating oil sucked by the oil suction assembly into the oil collection tank; and the oil return assembly is used for conveying the lubricating oil collected in the oil collecting tank back to the dual-mode fluorine pump refrigeration assembly under the conditions that the pipeline of the oil return assembly is connected and the pipeline of the oil collecting assembly is disconnected. According to the scheme, the oil collecting tank is arranged outside the liquid storage tank, different parts of the liquid storage tank are arranged according to the oil liquid density, the liquid storage tank and the oil collecting tank are controlled, part of lubricating oil generated when oil liquid layering occurs in the liquid storage tank can be collected and recycled, and the refrigeration operation reliability of the compressor can be improved.

Description

technical field [0001] The invention belongs to the technical field of air conditioners, and in particular relates to an oil return system of a dual-mode fluorine pump refrigeration device, a control method thereof, and a machine room air conditioner. Background technique [0002] The data center is provided with various data processing equipment. With the large-scale application of 4G and the gradual popularization of 5G, the calorific value of various data processing equipment is increasing, and the cooling capacity and energy-saving requirements of data centers on air-conditioning equipment are also getting higher and higher. [0003] The use of outdoor natural cold sources in transitional seasons and cold winters to cool the data center can greatly reduce the operating costs of air-conditioning equipment. In some solutions, the air-conditioning equipment adopts a dual-mode fluorine pump refrigeration device (such as a fluorine pump air conditioner). [0004] In a dual-...

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Problems solved by technology

[0006] The object of the present invention is to provide an oil return system of a dual-mode fluorine pump refrigeration device and its control method and a machine room air conditioner, so as to solve the problem of oil in the liquid storage tank when the fluorine pump heat pipe of the dual-mode fluorine pump refrigeration device is running. The phenomenon of liquid stratification causes the lack of oil or even damages the compressor during the start-up stage of the compressor, which affects the reliability of the compressor’s refrigeration operation. By setting the oil collection tank outside the liquid storage tank, according to the density of the lubricating oil and the density of the liquid refrigerant Density setting of different parts of the liquid storage tank, and control of the liquid storage tank and oil collection tank, can collect and recover part of the lubricating oil when oil stratification occurs in the liquid storage tank, which is conducive to improving the cooling operation of the compressor reliability effect

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