Frequency converter heat management system of air conditioner and air conditioner

Abstract

The invention discloses a frequency converter heat management system. The frequency converter heat management system comprises a frequency converter cooling unit. The frequency converter cooling unitcomprises a cooling loop used for cooling a frequency converter power module. The cooling loop comprises multiple cooling branches connected in parallel, and a cooler and a first switch module are arranged in each cooling branch. Each first switch module is positioned on the cooling branch of the outlet end of the corresponding cooler. The invention further discloses an air conditioner which comprises a refrigerating system and a frequency converter, the refrigerating system comprises a compressor, a condenser, a main evaporator and a throttling element, the inlet end of the compressor is connected with the main evaporator, the outlet end of the compressor is connected with the condenser, and the throttling element is located between the condenser and the main evaporator. The frequency converter is provided with the above frequency converter heat management system of the air conditioner, and the two ends of the frequency converter cooling unit in the frequency converter heat managementsystem are connected with the condenser and the main evaporator correspondingly. The heat management system has the advantages of being simple in structure, capable of preventing condensation and achieving accurate control and the like.

Description

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

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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