Method for controlling temperature and humidity in multi-connected air-conditioning system and multi-connected air-conditioning system

Abstract

Disclosed are a method for controlling temperature and humidity in a multi air-conditioning system and the multi air conditioning system. The method includes: the first stream of refrigerant inputted from a switching unit (3) of an outdoor unit (01) and the second stream of refrigerant inputted from the third port (9) of the outdoor unit (01) are converged and then shunted to output a first stream of refrigerant and a second stream of refrigerant respectively after being compressed by a shunting unit; the second stream of refrigerant outputted from the shunting unit passes through the first port (7) of the outdoor unit (01) to the first port of an indoor unit (02), and then passes through a second condenser (33) and an evaporator (34) of the indoor unit (02) orderly and flows out from the third port of the indoor unit (02) and is refluxed to the shunting unit through the third port (9) of the outdoor unit (01); the first stream of refrigerant outputted from the shunting unit is switched to orderly flow through a first condenser (4), a first evaporator (37) and is entered into the shunting unit.

Description

technical field [0001] The invention relates to a multi-connected air conditioner control technology, in particular to a method for controlling temperature and humidity in a multi-connected air-conditioning system and the multi-connected air-conditioning system. Background technique [0002] With the continuous improvement of people's living standards, installing air-conditioning systems in living and indoor working environments to improve the comfort of living and working environments has become an important choice for people to improve their comfort needs. Among them, multi-connected air-conditioning technology is an important direction for the development of air-conditioning due to its advantages of free control, high efficiency and energy saving, and easy installation and maintenance. [0003] The multi-connected air conditioning system is mainly used to control the indoor temperature and humidity, and generally includes one or more outdoor units, one or more indoor unit...

AI Technical Summary

Problems solved by technology

The mass transfer inside the total heat exchanger is due to the pressure difference between the water vapor partial pressure in the outdoor fresh air and the indoor return air. The limited moisture permeability of the internal paper limits the heat and mass transfer capacity of the total heat exchanger, resulting in insufficient dehumidification in summer and insufficient humidification in winter

In addition, total heat exchangers cannot handle the indoor sensible heat load, where sensible heat is when heat is added or removed, causing a change in the temperature of a substance without a phase change

Sensible heat load control depends on the indoor unit terminal of the multi-connected air conditioning system. The joint use of the indoor unit terminal and the total heat exchanger makes the user's investment high and installation and maintenance inconvenient

[0006] It can be seen from the above that the existing means of cooling and dehumidification and the rotary dehumidification system are not suitable for multi-connected air-conditioning systems due to their low energy efficiency ratio and bulky size; while multi-connected air-conditioning systems use the combined application of indoor air supply terminals and total heat exchangers to Separately control the indoor temperature and humidity, but this leads to high user costs, and the indoor equipment is not compact enough, installation and maintenance are inconvenient, and the energy efficiency of the multi-connected air conditioning system is relatively low.

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