Direct current variable frequency multifunctional air conditioning system and control method thereof

Abstract

The invention discloses a direct current variable frequency multifunctional air conditioning system comprising a multi-online air conditioner, an afterheat recycling device, a hot pump water heater and a floor radiation heating system; one end of the afterheat recycling device is communicated with a flow adjusting pipe (6), and the other end of the afterheat recycling device is communicated with a high pressure fluid storing device (20) through a second condenser (18); the hot pump water heater is connected with the afterheat recycling device in parallel; and both ends of the floor radiation heating system are respectively connected with both ends of an indoor multi-linked machine (28) in parallel. The core content of the control method of the system is as follows: the starting or stopping of the direct current variable frequency compressor or the fixed frequency compressor can be determined according to the comparison between the water outlet temperature or the environment temperature and the target set temperature. Thus, when these systems are mounted, only one set of basic control device is required to mount without independent installation respectively; therefore, the system and method have few primary investment and low cost; simultaneously, these functions are performed on one operation system, and the operation is very convenient; furthermore, the system and method are beneficial to saving energy and reducing emission.

Description

technical field [0001] The invention relates to the technical field of air-conditioning equipment, in particular to a DC frequency conversion multifunctional air-conditioning system and a control method thereof. Background technique [0002] The DC frequency conversion air conditioner in the prior art refers to the air conditioner that adopts the DC frequency conversion control system and the corresponding DC frequency conversion compressor. . With the improvement of people's living standards, the pursuit of quality of life is getting higher and higher. Many families, especially apartments or villas, are equipped with DC inverter multi-connected air conditioners, heat pump water heaters and other cooling or heating systems. systems, which are independently controlled. Therefore, it has the following disadvantages: [0003] 1) Since the above-mentioned cooling or heating systems often have a single function, it also means that users often have to install multiple sets of s...

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Problems solved by technology

[0003] 1) Since the above-mentioned cooling or heating systems often have a single function, it also means that users often have to install multiple sets of systems with different functions, which will inevitably lead to large initial investment and high cost;

[0004] 2) When the user requests to achieve various functions such as indoor air temperature adjustment, shower hot water supply, and realization of suitable temperature in the large living room at the same time, these systems need to be turned on at the same time. The independent control between these systems will make the operation inconvenient ;

[0005] 3) In addition, in the DC frequency conversion multi-connected air conditioning system, when the DC frequency conversion compressor adjusts the operating frequency according to the required capacity of the indoor unit, part of the heat energy is not effectively reused, resulting in waste of heat energy, which is not conducive to energy saving and emission reduction. implement

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