Combined cycle heat pump unit

Abstract

The invention provides a combined cycle heat pump device, which belongs to the technical field of energy power and heat pump. The compressor is connected to the expander through the high temperature heat exchanger, the expander is connected to the compressor through the medium temperature evaporator and the low temperature evaporator, the heat supply unit is connected to the low temperature evaporator through the circulating pump, the low temperature evaporator is connected to the second expander, and the heat supply unit is connected to the second expander through the first heat exchanger. The secondary circulation pump is connected to the medium temperature evaporator, the medium temperature evaporator is connected to the third expander, the second expander and the third expander are connected to the heater; the second compressor is connected to the second heater, and the second heater is throttled The valve communicates with the evaporator, and the evaporator communicates with the second compressor; the high-temperature heat exchanger and the medium-temperature evaporator have a heat source medium channel, the heater and the second heater have a heated medium channel, and the evaporator has a low-temperature heat medium channel and communicated respectively. Externally, the expander, the second expander and the third expander connect the compressor and the second compressor and transmit power to form a combined cycle heat pump device.

Description

Technical field: [0001] The invention belongs to the technical field of energy power and heat pump. Background technique: [0002] Cold demand, heat demand and power demand are common in human life and production; in reality, people often need to use high-temperature thermal energy to achieve cooling, heating or conversion into power, and also need to use power for cooling or use power and combine Low temperature thermal energy for heating. In the process of realizing the above purpose, there will be many considerations or conditions, including the type, grade and quantity of energy, the type, grade and quantity of user requirements, ambient temperature, type of working medium, equipment flow, structure and quantity. manufacturing costs, etc. [0003] In the field of refrigeration or heating technology, the use of phase-change medium to realize temperature difference utilization is a common technical means, which has many advantages, but also has shortcomings - especially ...

AI Technical Summary

Problems solved by technology

[0003] In the field of refrigeration or heating technology, the use of phase change media to realize temperature difference utilization is a common technical means, which has many advantages, but also has shortcomings—especially for non-high-quality fuels, high temperature and variable temperature heat sources, it will lead to the use of temperature difference Insufficient, low performance index or high operating pressure; in actual demand, it is also necessary to consider providing external power while heating or cooling, to consider the effective use of mechanical energy during cooling / heating, and to input energy, low temperature, etc. Adaptation range of heat medium and heating demand, etc.

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