A self-cascading heat pump system with multi-mode injection efficiency and its operation mode
A heat pump system, self-cascading technology, applied in lighting and heating equipment, compressors with cascaded work, refrigeration components, etc., can solve problems such as not being able to satisfy users well, achieve simple structure, increase temperature and Stress, cheap effect
Active Publication Date: 2019-04-16
XI AN JIAOTONG UNIV
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Problems solved by technology
Therefore, in areas with great differences in outdoor ambient temperature in winter and summer, single-stage heat pumps or self-cascading heat pumps cannot meet the needs of users well.
Method used
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[0017] like figure 1 As shown, the present invention is a self-cascading heat pump system with multi-mode injection synergism, which consists of a compressor 1, a condenser 2, a gas-liquid separator 3, a first throttle valve 4, a condensing evaporator 5, a second throttle Valve 6, evaporator 7, steam injector 8, first control valve 9, second control valve 10, third control valve 11 and fourth control valve 12;
[0018] The outlet of the compressor 1 is communicated with the condenser 2, the gas-liquid separator 3, the first throttle valve 4, the condensation evaporator 5, the fourth control valve 12 and the inlet of the compressor 1 in turn through a connecting pipe; the gas-liquid separator 3 The outlet at the upper end is divided into two routes, one route is connected with the first control valve 9, condensing evaporator 5, second throttle valve 6, evaporator 7 and the outlet of the first throttle valve 4 through the connecting pipe in sequence; the other route is connected...
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The invention discloses a self-cascading heat pump system with multi-mode injection and synergistic efficiency and its operating mode. The system consists of a compressor, a condenser, a gas-liquid separator, a throttle valve, a condensation evaporator, an evaporator, a steam ejector and Composed of control valves; the outlet of the compressor is connected with the condenser, the gas-liquid separator, the first throttle valve, the condensing evaporator, the fourth control valve and the inlet of the compressor in turn; the outlet of the gas-liquid separator is divided into two ways, one way The first control valve, the condensing evaporator, the second throttle valve, the evaporator and the outlet of the first throttle valve are connected in turn; the other is connected with the second control valve and the steam injector inlet; the condensing evaporator outlet is connected with the first The three control valves are connected with the inlet of the steam ejector; the outlet of the steam ejector is connected with the inlet of the compressor; the present invention utilizes the steam ejector to recover the available energy of the high-pressure refrigerant gas in the gas-liquid separator, and can select a single valve according to the outdoor ambient temperature Stage heat pump, self-cascade heat pump or partial cascade heat pump operation mode.
Description
technical field [0001] The invention relates to a self-cascading heat pump system, in particular to a self-cascading heat pump system with multi-mode injection efficiency enhancement and its operating mode. Background technique [0002] The use of heat pump units for heating is one of the main heating methods in winter in my country. However, in the cold north, the outdoor ambient temperature is often very low, and the single-stage heat pump can no longer work normally or has poor performance. The self-cascading heat pump utilizes the characteristic that the gas-liquid phase composition of the non-azeotropic mixed refrigerant is different when the gas-liquid phase is balanced, and the high-boiling point refrigerant and the low-boiling point refrigerant are separated through the condenser and the gas-liquid separator and enter two cycles for recombination. Stack for heat. Compared with conventional cascading heat pumps, self-cascading heat pumps only need one compressor to a...
Claims
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IPC IPC(8): F25B7/00F25B41/04F25B43/00F25B49/02F25B41/20F25B41/30
CPCF25B7/00F25B43/00F25B49/02F25B41/20
Inventor 赖芬刘明李国君
Owner XI AN JIAOTONG UNIV