Jet synergistic type enhanced vapor injection efficient heat pump

By using a jet-enhanced enthalpy-increasing high-efficiency heat pump, which combines an ejector and a flow-regulating electronic expansion valve, the safety and efficiency issues of jet-enhanced enthalpy-increasing heat pump units in low-temperature environments are solved, achieving safe and reliable operation of the compressor and increased heating capacity.

CN224284988UActive Publication Date: 2026-05-26NINGBO UNIVERSITY OF TECHNOLOGY
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Patent Information

Application Number
CN202521518457.1
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-07-18
Publication Date
2026-05-26
Estimated Expiration
2035-07-18

AI Technical Summary

Technical Problem

In low-temperature environments, conventional jet enthalpy-increasing heat pump units are prone to compressor damage or back injection due to excessive or insufficient refrigerant. Existing technologies cannot improve heating capacity and energy efficiency while ensuring safety.

Method used

The system employs a high-efficiency heat pump with enhanced jet enthalpy and injection technology. The refrigerant in the flash tank enters the low-pressure ejector tube of the ejector through the flow-regulating electronic expansion valve. Combined with the ejector, the refrigerant is injected into the intermediate pressure chamber of the compressor. The high-temperature and high-pressure refrigerant exchanges heat with the return gas refrigerant in the gas-liquid separator, ensuring positive injection and increasing the compressor temperature.

Benefits of technology

It enables safe and reliable operation of the compressor in low-temperature environments, improves heating capacity and operating efficiency, and avoids liquid-carrying operation and back-jet phenomena in the compressor.

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Abstract

The utility model provides a jet synergy type enhanced vapor injection high-efficiency heat pump, the system is composed of a conventional heat pump module, an enhanced vapor injection module and a jet module, the enhanced vapor injection module comprises a flash tank and a jet electronic expansion valve, and the jet module comprises a jet, an electromagnetic valve and other parts. Refrigerant flashed from the flash tank enters the ejector through the ejection electronic expansion valve and is ejected to a middle pressure cavity of the compressor through the ejector, and the enhanced vapor injection effect is generated. Besides, in order to improve the ejection effect of the ejector and control the working temperature of the compressor, an ejection coil pipe is designed in the gas-liquid separator, high-temperature and high-pressure refrigerants are introduced from the high-pressure side, and heat exchange with return gas refrigerants is achieved in gas separation, so that on one hand, the temperature of the refrigerants in the low-pressure section of a compressor cavity can be increased, and the compressor is prevented from running with liquid; meanwhile, the intermediate cavity temperature and the exhaust temperature of the compressor can be reduced, the whole cavity temperature of the compressor is moderate, and safe and reliable operation of the compressor is guaranteed.
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