A co2 heating heat pump system
A heat pump system and inlet technology, applied in heating systems, hot water central heating systems, household heating, etc., to achieve the effects of improving system energy efficiency, improving energy efficiency, and increasing enthalpy difference
Active Publication Date: 2018-03-20
XI AN JIAOTONG UNIV
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Problems solved by technology
[0006] The object of the present invention is to provide a CO 2 Heating heat pump system to solve the existing heating heat pump system using CO 2 Working fluid problems exist when making transcritical CO 2 The heat pump system can be efficiently and stably applied to heating in the form of radiators in winter
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[0025] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0026] see image 3 and Figure 4 Shown, the present invention a CO 2 The heating heat pump system includes a first compressor 11 , a second compressor 12 , an ejector 13 , a gas cooler 14 , a first expansion valve 15 , a flash tank 16 , a second expansion valve 17 and an evaporator 18 .
[0027] The exhaust port of the first compressor 11 is connected to the inlet of the ejector 13, and after injecting the gas from the second compressor 12, the outlet of the ejector 13 is connected to the inlet of the gas cooler 14, and the refrigerant releases heat in the gas cooler 14, Heating water for heating; the outlet of the gas cooler 14 is connected to the inlet of the first expansion valve 15, the outlet of the first expansion valve 15 is connected to the inlet of the flash tank 16, the throttled refrigerant is separated in the flash tank 16, and the gas enters t...
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The invention discloses a CO2 heating heat pump system, comprising a first compressor, a second compressor, an ejector, a gas cooler, a first expansion valve, a flash tank, a second expansion valve and an evaporator; the first compressor The exhaust port is connected to the first inlet of the ejector, the exhaust port of the second compressor is connected to the second inlet of the ejector, the outlet of the ejector is connected to the inlet of the gas cooler; the outlet of the gas cooler is connected to the first expansion valve The inlet and the outlet of the first expansion valve are connected to the inlet of the flash tank; the gas outlet in the flash tank is connected to the inlet of the second compressor, and the liquid outlet of the flash tank is connected to the inlet of the first compressor through the second expansion valve and the evaporator. The invention uses two parallel compressors to reduce the performance attenuation problem of the CO2 heat pump when the return water temperature is high (50°C); the power consumption of the two compressors is reduced by using the ejector, and the energy efficiency of the system is improved; A return air U-shaped pipe with an oil return hole is installed to ensure that the suction state of the compressor is gaseous.
Description
【Technical field】 [0001] The invention belongs to the technical field of mechanical engineering and relates to a CO 2 Compound heat pump system. 【Background technique】 [0002] Mechanical compression heat pump technology uses a small amount of high-grade mechanical energy to complete the cycle of refrigerant in the system by using a compressor, extract heat from a lower temperature heat source and heat other media, that is, by consuming a small amount of high-grade energy, the low Grade energy is upgraded to high grade energy. The air source heat pump uses outdoor air as the heat source to heat or supply hot water. It is easy to install and use, has less environmental pollution, and its energy-saving effect is significantly higher than that of heating methods such as electric heating. However, there are some deficiencies in the operation of air source heat pumps in low temperature environments. For example, as the ambient temperature decreases, the indoor heat load demand ...
Claims
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IPC IPC(8): F24D3/18F25B31/00F25B41/00F25B41/31
CPCF24D3/18F25B31/00F25B41/00F25B2400/06
Inventor 曹锋杨东方金磊何永宁殷翔
Owner XI AN JIAOTONG UNIV