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Single-screw refrigeration compressor heat pump system coupling air supply and composite slide valve

A refrigeration compressor and heat pump system technology, which is applied in the field of fluid machinery, can solve the problems of increasing the power consumption of the compressor and the large difference between the internal and external pressure ratio of the compressor, etc., and achieve the effect of improving intelligence and simple structure

Pending Publication Date: 2021-06-01
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the existence of a low temperature environment, there will be a large difference in the internal and external pressure ratio of the compressor, that is, the compressor is prone to a very strong undercompression state, which will increase the power consumption of the compressor

Method used

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  • Single-screw refrigeration compressor heat pump system coupling air supply and composite slide valve
  • Single-screw refrigeration compressor heat pump system coupling air supply and composite slide valve
  • Single-screw refrigeration compressor heat pump system coupling air supply and composite slide valve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1: For the heat pump system that couples flasher air supply and composite slide valve, compressor (1) outlet is provided with first pressure sensor 2, and gas enters condenser (3) after coming out from compressor (1), and gas After the condenser (3) cools down, it enters the first-stage throttling element (4), throttling the medium-pressure gas-liquid mixture into the flasher (5), and the gas coming out of the flasher (5) is directly connected to the compressor ( 1) The gas supply port is connected, and the liquid from the flasher (5) enters the compressor (1) through the secondary throttling element (6) and the evaporator (7) in sequence. The inlet of the compressor (1) is provided with a second pressure sensor (8).

[0017] When the pressure in the heat pump system changes due to changes in the external environment, the first pressure sensor (2) and the second pressure sensor (8) detect that the system is working under the medium pressure ratio condition, a...

Embodiment 2

[0018] Embodiment 2: For the heat pump system coupled with subcooler air supply and composite slide valve, the compressor (1) outlet is provided with a first pressure sensor 2, and the gas enters the condenser (3) after coming out of the compressor (1), and the gas After the condenser (3) is cooled, it enters the first-stage throttling element (4), throttling the gas-liquid mixture at medium pressure and then enters the subcooler (9), and the gas after absorbing heat enters the compressor directly through the air supply port of the compressor (1). The gas from the condenser (3) directly enters the subcooler (9) to heat the throttling gas-liquid mixture, and the liquid directly from the subcooler (9) passes through the secondary throttling element (6), the evaporator ( 7) Enter the compressor (1). The inlet of the compressor (1) is provided with a second pressure sensor (8).

[0019] When the pressure in the heat pump system changes due to changes in the external environment,...

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Abstract

The invention discloses a single-screw refrigeration compressor heat pump system coupling air supply and a composite slide valve, and belongs to the technical field of compressors. The heat pump system aims to adjust the capacity and the internal volume ratio of a single-screw refrigeration compressor by utilizing the composite slide valve, and to increase the heating capacity of the heat pump system by utilizing air supply, and belongs to the field of fluid machinery. According to the system, air supply and the composite slide valve are coupled to realize air supply, and the variable internal volume ratio can be realized at the same time. Therefore, when the single-screw refrigeration compressor applying the coupled air supply and the composite slide valve is applied to the heat pump system, the system performance of the heat pump system can be improved in a low-temperature environment, and the overall power consumption of the heat pump system can be reduced under other working conditions deviating from the design working condition.

Description

technical field [0001] The invention relates to a novel single-screw refrigerating compressor, which aims at adjusting the capacity and inner volume ratio of the single-screw refrigerating compressor by using a compound slide valve, and at the same time increasing the exhaust volume of the compressor by supplementing air, belonging to the field of fluid machinery. Background technique [0002] For compressors used in heat pumps, adjusting the capacity and internal volume ratio can meet the different needs of users. Capacity adjustment can meet the demand for heat load, and the internal volume ratio is used to adjust the matching degree of the internal and external pressure ratio of the heat pump system, that is, to match the change of the environment. The composite slide valve is a single slide valve structure composed of coaxial double slide blocks, which can realize the adjustment of capacity and content ratio at the same time. However, in the process of adjusting the int...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B1/047F25B49/02
CPCF25B1/047F25B49/02
Inventor 吴玉庭温强宇雷标马重芳李亚南
Owner BEIJING UNIV OF TECH
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