Two-stage heating air conditioning system with defrosting function and control method thereof

Abstract

The invention discloses a two-stage heating air conditioning system with a defrosting function and a control method of the two-stage heating air conditioning system with the defrosting function. The two-stage heating air conditioning system with the defrosting function comprises an outdoor unit and an indoor unit. A main four-way reversing valve and a heat storage four-way reversing valve are arranged in the outdoor unit. Two-stage heating and the process of defrosting of the air conditioning system are conducted at the same time and two-stage heating and heat storage of the air conditioning system are also conducted at the same time by controlling the main four-way reversing valve, the heat storage four-way reversing valve and the rest of electromagnetic valves to be opened and closed. The two-stage heating air conditioning system with the defrosting function and the control method of the two-stage heating air conditioning system with the defrosting function have the advantages that two-stage heating and defrosting can be conducted at the same time, two-stage heating and heat storage can also be conducted at the same time, the indoor unit operates for heating without stopping when defrosting and heat storage are conducted, better user experience can be provided, and the comfort level is greatly increased.

Description

technical field [0001] The invention relates to the field of air-conditioning system control, and more specifically relates to a two-stage heating and air-conditioning system with a defrosting function and a control method thereof. Background technique [0002] Air conditioning is air conditioning, which refers to the process of adjusting and controlling the temperature, humidity, cleanliness, speed and other parameters of the ambient air in the building / structure by artificial means. The structure of the air conditioner mainly includes: compressor, condenser, evaporator, Composed of four-way valve and one-way valve capillary assembly. [0003] In the south, the indoor temperature is low in winter, and it is often necessary to use the air conditioner to heat the indoor air. However, when the air conditioner is heating, when the evaporation temperature drops, the outdoor heat exchanger will be frosted, and the frosting of the outdoor heat exchanger will seriously affect The ...

AI Technical Summary

Problems solved by technology

The basic principle of the hot gas bypass method is to distribute part of the heat-bearing gas discharged from the compressor to the outdoor heat exchanger through a branch circuit for defrosting, but this defrosting method will divert part of the heat generated by the compressor and affect the performance of the air conditioner. Heating performance, and using the hot gas bypass method for defrosting not only takes a long time but also has poor defrosting effect

The basic principle of the four-way valve reversing method is to use the four-way reversing valve to defrost the outdoor heat exchanger and heat the room respectively by switching different channels of the four-way valve. The working condition of the four-way reversing valve changes the air conditioning system from a heating state to a cooling state, so that continuous heat supply to the room cannot be guaranteed, resulting in reduced comfort and poor user experience

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