Twin-screw compressor with intermediate air-pumping function and multiple-temperature-zone heat pump system

Abstract

The invention discloses a twin-screw compressor with an intermediate air-pumping function and a multiple-temperature-zone heat pump system. The twin-screw compressor with the intermediate air-pumping function comprises a motor system, a compression system, and an air-discharging end seat, wherein the compression system comprises a male rotor, a female rotor, and a machine body; the motor system includes a motor housing, a variable frequency motor, and a connecting box arranged at the outside of the motor housing; and the air-discharging end seat is provided with an exhaust valve connection port communicating with the inside of the machine body. The multiple-temperature-zone heat pump system having the twin-screw compressor with the intermediate air-pumping function includes a high-temperature condenser, a low-temperature condenser, a first throttling valve, a second throttling valve, an evaporator, and the twin-screw compressor with the intermediate air-pumping function. According to the invention, heat sources with different temperatures can be provided by a single compressor.

Description

Technical field [0001] The invention belongs to the technical field of heat pump air conditioning, and relates to a compressor and a multi-temperature zone heat pump system, in particular to a twin-screw compressor with an intermediate air extraction 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 industry, power, machinery, construction, refrigeration and heat pumps with their unique advantages such as high pressure ratio, large flow, stability and reliability. application. Twin-screw compressors are not particularly sensitive to changes in air volume. You can set up air supplement holes in the body. In some systems, screw compressors with economizers are used. The liquid from the condenser is divided into two streams, and a small part is first throttled and then It becomes a cryogenic liquid and enters the economizer, and ...

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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