A twin-screw compressor with intermediate pumping function and multi-temperature zone heat pump system

Abstract

The invention discloses a twin-screw compressor with an intermediate pumping function and a multi-temperature zone heat pump system. The twin-screw compressor with an intermediate pumping function includes a motor system, a compression system and an exhaust end seat; The compression system includes a male rotor, a female rotor and a machine body. The motor system includes a motor housing, a variable frequency motor and a junction box located outside the motor housing. The exhaust end seat is provided with an exhaust valve that communicates with the inside of the machine body. interface. The multi-temperature-zone heat pump system of the twin-screw compressor with intermediate pumping function according to the present invention includes a high-temperature stage condenser, a low-temperature stage condenser, a first throttle valve, a second throttle valve, an evaporator, and an intermediate Twin-screw compressor with suction function. The invention can provide heat sources with different temperatures through a single compressor.

Description

technical field [0001] The invention belongs to the technical field of heat pump air conditioners, and relates to a compressor and a multi-temperature zone heat pump system, in particular to a twin-screw compressor with an intermediate pumping function and a multi-temperature zone heat pump system. Background technique [0002] Since its development in the 1930s, twin-screw compressors have been widely used in many applications such as chemical engineering, power, machinery, construction, refrigeration and heat pumps due to their unique advantages such as high pressure ratio, large flow rate, stability and reliability. application. The twin-screw compressor is not particularly sensitive to the change of the air volume, and the air supply orifice can be set in the body. In some systems, a screw compressor with an economizer is used. The liquid coming out of the condenser is divided into two streams, and a small part is throttled first. It turns into a low-temperature liquid ...

AI Technical Summary

Problems solved by technology

Among them, small boilers can only provide steam at a certain temperature. Such a large temperature difference heat exchange will cause a large irreversible loss of the system, which not only reduces energy utilization efficiency, but also causes serious pollution to the environment; although the electric heating method is simple and environmentally friendly, it is efficient. It is very low, and the long-term operation cost of the system is high; multiple heat pump unit systems solve the above problems to a certain extent, using multiple compressors to provide different exhaust temperatures will not only cause no environmental pollution, but also improve system efficiency. Greatly reduce the cost of use

However, the use of multiple heat pump units will also bring some other problems, such as high initial investment costs, complex system adjustment and load matching, and greatly reduced system reliability.

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