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Heat pump system based on regenerative cycle and throttling element control method

A heat pump system and regenerative cycle technology, applied in heat pumps, superheaters, refrigerators, etc., can solve problems such as clogging of low-pressure throttling elements, improve exhaust temperature, relieve suction low pressure and throttling elements congestion problems, The effect of improving low temperature fluidity

Pending Publication Date: 2021-06-22
XI AN JIAOTONG UNIV
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  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of low pressure phenomenon and throttling element blockage in the existing compression cycle system during heating start-up and defrosting process, and propose a heat pump system and throttling element control method based on regenerative cycle

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  • Heat pump system based on regenerative cycle and throttling element control method
  • Heat pump system based on regenerative cycle and throttling element control method
  • Heat pump system based on regenerative cycle and throttling element control method

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Embodiment Construction

[0031] The content of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0032] The heat recovery cycle used in the refrigeration industry is generally used in the refrigeration cycle, not in the heating cycle. In the refrigeration cycle, its main functions are: 1. Make the liquid refrigerant fully supercooled to prevent flash gas from appearing in the liquid refrigerant pipeline, and ensure that the refrigerant before entering the throttle valve is in liquid state; 2. Improve Compressor suction temperature to prevent evaporator frosting, condensation and compressor liquid hammer phenomenon.

[0033] The present invention proposes a heat pump system based on a heat recovery cycle and a control method for a throttling element. The system uses the heat recovery cycle in the heating cycle, and utilizes the surplus caused by the temperature difference between the high temperature at the outlet o...

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Abstract

The invention provides a heat pump system based on a regenerative cycle and a throttling element control method. The problems that an existing compression cycle system has a low pressure phenomenon and a throttling element is blocked are solved. The heat pump system comprises a compressor, a condensation heat exchanger, a regenerator, a throttling element and an evaporation heat exchanger, wherein an outlet of the compressor is connected with an inlet of the condensation heat exchanger, an outlet of the condensation heat exchanger is connected with a hot end inlet of the regenerator, a hot end outlet of the regenerator is connected with an inlet of the throttling element, an outlet of the throttling element is connected with an inlet of the evaporation heat exchanger, an outlet of the evaporation heat exchanger is connected with a cold end inlet of the regenerator, and a cold end outlet of the regenerator is connected with an inlet of the compressor. According to the system, residual heat brought by the temperature difference between high temperature at the outlet of the condensation heat exchanger and suction temperature is utilized to increase the suction superheat degree, so that the exhaust superheat degree is controlled, the solubility of a refrigerant in an oil pool is lowered, the problems of suction low pressure and throttling element blockage in an unsteady process are relieved, and the reliability and the energy efficiency ratio of the system are improved.

Description

technical field [0001] The invention belongs to the field of heating, and in particular relates to a heat pump system based on a regenerative cycle and a control method for a throttling element. Background technique [0002] Since entering the 21st century, energy conservation and environmental protection have become the development theme of the refrigeration industry. Because CFCs (hydrochlorofluorocarbons) and HCFCs (hydrofluorocarbons) refrigerants have a destructive effect on the ozone layer, refrigerants such as R22, which are commonly used in the field of refrigeration, have been phased out or will be phased out. Nowadays, the refrigerants widely used in the refrigeration industry include R134a, R32, R410A, etc. The molecules of these refrigerants contain hydrogen, fluorine, and do not contain chlorine, so they will not destroy the ozone layer, but this type of refrigerant has a high Greenhouse effect, with the increasing severity of the greenhouse effect, such refrig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B30/02F25B31/00F25B40/06F25B41/31F25B49/02
CPCF25B30/02F25B31/004F25B40/06F25B49/02
Inventor 吴建华李澳特李佳宸雷博雯
Owner XI AN JIAOTONG UNIV
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