Multi-line system

Abstract

The invention discloses a multi-connected system, comprising: multiple indoor units, at least one indoor unit includes a main heat exchange assembly and an auxiliary heat exchange assembly; an outdoor unit, the outdoor unit includes: a compressor, the compressor has an exhaust port, a second A suction port and a second suction port; the first reversing assembly, the first reversing assembly includes the first port to the fourth port; the second reversing assembly, the second reversing assembly includes the first valve port to the fourth port The valve port, the third valve port is connected to the fourth interface; the outdoor heat exchanger; the first refrigerant flow path to the third refrigerant flow path, the first refrigerant flow path is respectively connected to the first end of the main heat exchange assembly and the auxiliary heat exchange assembly The first end of the main heat exchange assembly is connected to the second end of the second refrigerant flow path, and the second end of the auxiliary heat exchange assembly is connected to the second end of the third refrigerant flow path. The multi-connection system of the present invention can avoid excessive indoor dehumidification, avoid frequent startup and shutdown in rooms with small loads, and improve system reliability and operating energy efficiency.

Description

technical field [0001] The invention relates to the technical field of air conditioning, in particular to a multi-connected system. Background technique [0002] At present, the government and consumers have gradually increased their energy efficiency requirements for air-conditioning systems, and are gradually paying attention to seasonal energy efficiency and operational energy saving. In order to improve seasonal energy efficiency and actual operating energy efficiency, there are two main energy-saving measures for air-conditioning systems, especially multi-connected systems: one is to directly improve system energy efficiency, such as using variable refrigerant evaporation temperature, when the system load is small, actively increase The evaporation temperature of the refrigerant in the system improves the energy efficiency of the system. The second is to reduce the number of system starts and stops and improve the energy efficiency of operation. For example, if a compr...

AI Technical Summary

Problems solved by technology

But after the cooling of the first few rows of heat exchangers, the difference between the temperature of the indoor return air and the evaporation temperature of the refrigerant becomes relatively small (usually the heat exchange temperature difference is less than three degrees), so the last row of heat exchangers has almost no cooling effect. Cooling effect, low utilization rate

In turn, affect the energy efficiency of the multi-connected system

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