Inverter thermal management system for air conditioner and air conditioner

Abstract

The invention discloses a frequency converter thermal management system for an air conditioner, which includes a frequency converter cooling unit, the frequency converter cooling unit includes a cooling circuit for cooling a frequency converter power module, and the cooling circuit includes a plurality of cooling branches connected in parallel with each other. A cooler and a first switch module are arranged in the cooling branches, and each first switch module is located on the cooling branch corresponding to the outlet end of the cooler. The invention also discloses an air conditioner, which includes a refrigeration system and a frequency converter. The refrigeration system includes a compressor, a condenser, a main evaporator and a throttling element. The inlet end of the compressor is connected to the main evaporator, and the outlet end is connected to the condenser. Connected, the throttling element is located between the condenser and the main evaporator, the inverter is provided with the inverter thermal management system of the air conditioner as described above, and the two ends of the inverter cooling unit in the inverter thermal management system are respectively connected to the condenser. connected to the main evaporator. The thermal management system of the present invention has the advantages of simple structure, anti-condensation and precise control.

Description

technical field [0001] The invention mainly relates to the technical field of power electronic thermal management, in particular to a frequency converter thermal management system of an air conditioner and an air conditioner. Background technique [0002] The frequency conversion of refrigeration and heat pump units has stronger working condition adjustment ability, which is an effective measure to improve the unit's ability to adjust. The frequency conversion of central air conditioners has become an industry trend. The inverter of the unit adopts refrigerant cooling, which has the advantages of high efficiency, simplicity, cleanliness, strong economy and convenient maintenance. However, the thermal management of the inverter is also more complex, requiring a better thermal management system. [0003] The thermal management load inside the inverter of refrigeration and heat pump units is usually divided into two parts, one part is the heat of the power device, and the oth...

AI Technical Summary

Problems solved by technology

In actual operation, the cooling temperature of the refrigerant in the inverter may be lower than the ambient temperature. Compared with the traditional water-cooled and air-cooled systems, there may be a new problem of condensation

In addition, for multi-power module inverters, the cooling branches of each power module need to be designed in parallel. When the differences between each cooling branch are large, it is impossible to accurately control each cooling branch

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