Multi-connected heat recovery air conditioning system and its operation method

Abstract

The invention discloses a multi-connected heat recovery air-conditioning system, which includes an indoor unit and an outdoor unit. For thermal air conditioners, four-way valves are installed in the system, and different operating conditions of the air-conditioning system and combinations of various working conditions are realized through the selection of opening and closing of the four-way valve ports; the invention also discloses the above-mentioned multi-connected thermal Recycling the operating method of the air-conditioning system; in the present invention, the domestic water and the floor heating water are treated separately to ensure the water quality and temperature of the domestic water, and it can also prevent some indoor units from retaining refrigerant inside when they are not running, resulting in a reduction in the working efficiency of the air-conditioning system .

Description

technical field [0001] The invention relates to a multi-connected air conditioner, in particular to a multi-connected heat recovery air-conditioning system and its operating method. Background technique [0002] The multi-connected heat recovery air conditioning system is a multi-connected system that adds waste heat recovery and floor heating functions to the ordinary multi-connected system. This system is mainly to add a four-way valve to the ordinary multi-connected system to switch the high-temperature refrigerant to the hot water tank, and store the waste heat in the water tank to achieve the purpose of heat recovery; this system switches the refrigerant to the floor heating generator on the common multi-connected system , release the heat to the floor water system circulation to achieve the effect of heating. The heating comfort of floor heating is better than that of traditional fan coil system, and it is more energy-saving. [0003] In the existing multi-connected ...

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Problems solved by technology

[0003] In the existing multi-connected heat recovery air-conditioning system, the hot water used by the hot water system and the floor heating system are processed separately through the same heat exchanger, and the quality of domestic hot water cannot be guaranteed.

Restricted by the operating range of the compressor, the water temperature is usually lower than 50°C and cannot meet the higher requirements for domestic hot water on water temperature

When some indoor units are not running, the refrigerant will remain in them, which will reduce the amount of refrigerant in the working cycle of the system and affect the working efficiency of the system

The multi-connected heat recovery air conditioning system in the prior art usually has an actual working efficiency of only 40% of its design power, or even lower

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