Industrial ultrahigh temperature heat pump unit

Abstract

The invention discloses an industrial ultrahigh temperature heat pump unit. A main refrigerant circulation loop of the heat pump unit is mainly formed by connecting a compressor, a condenser, a booster, a main throttling device and an evaporator. A main refrigerant outlet of the booster is further connected with a motor cooling circulation loop, an oil cooling circulation loop and a refrigerant boosting loop. A cooler and an ejector are mainly arranged in the motor cooling circulation loop. The oil cooling circulation loop is mainly provided with an oil separator, an oil circulation pump, an oil cooler and a drying filter. According to the industrial ultrahigh temperature heat pump unit, the compressor motor cooling effect is good, and the service life is long; the lubricating oil supply temperature is low, and high-temperature decomposition is avoided; and the supercooling degree of a main refrigerant is increased, and the exhaust temperature of the compressor is reduced while the heating amount is increased. According to the industrial ultrahigh temperature heat pump unit, the heating water outflow temperature is high, and running of the heat pump unit is stable and reliable.

Description

technical field [0001] The invention relates to the technical field of thermal energy engineering heat pumps, in particular to an industrial ultra-high temperature heat pump unit. Background technique [0002] In the heating link of the industrial production process itself that requires low thermal energy grade (less than 150°C), such as petroleum refining process, metallurgical production process, building material production process, food processing process, chemical production process, etc., on the one hand, the traditional The way of heating is to burn fossil fuels or even direct electric heating, resulting in huge dissipation of available energy. On the other hand, in various industrial production processes, a large amount of waste heat resources are associated, and the temperature is mostly above 50°C. If these low-grade heat energy cannot be effectively used, it will not only cause a lot of waste of energy resources, but also cause damage to the environment. thermal ...

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Problems solved by technology

[0003] At present, the heating outlet temperature of ordinary heat pump devices is mostly below 80°C. For the case where the heating outlet temperature is required to be higher, such as above 100°C, the heat pump device mainly faces high compressor discharge temperature, high temperature decomposition of lubricating oil, compressor Many problems, such as poor cooling of the motor, lead to the unstable and reliable operation of the heat pump unit

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