Compressor exhaust temperature control device and its control method and applications

Abstract

The present invention relates to an exhaust temperature controller of a compressor and a control method and an application thereof. A compressing cavity is arranged in the compressor; a high-pressure gas circuit is arranged outside the compressor; one end of the high-pressure gas circuit is communicated with the high pressure side of the compressor or a system, and the other end is communicated with the compressing cavity. A gas valve and flow-regulating valves are arranged in the high-pressure gas circuit. The high-pressure gas circuit is communicated with a liquid refrigerant circuit connected between the condenser and the expansion valve of the system; control valves, which can realize the communication of only the high-pressure gas circuit, the communication of only the liquid refrigerant circuit or the simultaneous communications of the high-pressure gas circuit and the liquid refrigerant circuit, are arranged in the high-pressure gas circuit and / or the liquid refrigerant circuit. The controller injects the high-pressure gas in a housing into the compressing cavity of an air cylinder to rapidly increase the exhaust temperature and pressure of the compressor in order to improve the working capability and efficiency of a greenhouse. When the outside temperature is low, the startup time and defrosting operation time of the greenhouse can be greatly shortened in the process of startup, operation, defrosting, etc.

Description

technical field [0001] The invention relates to a compressor, in particular to a compressor discharge temperature control device and a control method and application thereof. Background technique [0002] At present, there are the following fundamental problems in the heating operation of the air conditioner: when the outside temperature is below 0°C, the heating speed is very slow, and the temperature of the air blown out by the indoor unit is also relatively low. In addition, in the defrosting operation, the heating function stops, and it stops for a long time; in the operation under normal conditions, the heating capacity is often insufficient. Contents of the invention [0003] The object of the present invention is to provide a compressor exhaust temperature control device, its control method and application, which have a stable structure, reliable performance, long service life, greatly shortened heating start-up time and defrosting operation time, so as to overcome ...

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Problems solved by technology

[0002] At present, there are the following fundamental problems in the heating operation of the air conditioner: when the outside temperature is below 0°C, the heating speed is very slow, and the temperature of the air blown out by the indoor unit is also relatively low. In addition, in the defrosting operation, the heating function stops, and it stops for a long time; in the operation under normal conditions, the heating capacity is often insufficient

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