Heating control system and multi-line air-conditioning system containing the same manufacturing method

1. This utility model relates to the field of air conditioning technology, in particular to a heating control system and a multi-line air conditioning system containing the same.

Background technique:

2. At present, severely cold regions, cold regions, and hot summer and cold winter regions account for more than 70 percent of the global area. These regions have high heating demand in winter, and multi-line systems account for more than 75 percent of the heating demand market, and have huge Market.

3. The current conventional multi-line air-conditioning system generally has the problem of low-temperature heating capacity attenuation, resulting in poor comfort in winter. The main reason is that the outdoor unit heat exchanger gradually frosts during the low-temperature heating process of the multi-line system, which causes the refrigerant to evaporate. Completely, the accumulation of liquid is gradually formed in the gas, causing the system's refrigerant circulation to gradually decrease, so that the heat absorption of evaporation becomes lower and lower, the heat exchange capacity of the indoor unit gradually decreases, and the frequency of defrosting increases. On the market, the method to solve the above problems is usually to add electric auxiliary heating to the indoor unit, but this scheme has a large electric auxiliary heating power and does not save energy, and is facing a situation of phasing out.

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