Frequency converter heat management system of air conditioner and air conditioner

A management system and air conditioner technology, applied in space heating and ventilation, control input involving air characteristics, space heating and ventilation control input, etc. Achieve differential adjustment, improve reliability and working conditions applicability, and improve the effect of temperature uniformity

CN112460774AActive Publication Date: 2021-03-09CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2021-03-09

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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.
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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 ...

Examples

Embodiment Construction

[0023] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0024] like figure 1 As shown, the frequency converter thermal management system of the air conditioner in this embodiment includes a frequency converter cooling unit 4 connected to the condenser 2 and the main evaporator 3 in the refrigeration system of the air conditioner at both ends, and the frequency converter cooling unit 4 includes For cooling the cooling circuit 41 of the inverter power module, the cooling circuit 41 includes a plurality of parallel cooling branches 411, each cooling branch 411 is provided with a cooler 412 and a first switch module 413, and each first switch module 413 Located on the cooling branch 411 corresponding to the outlet end of the cooler 412 . Each power module in the inverter is installed on the cooler 412 to form heat transfer, and the heat generated by each power module is taken away by the low-temperatur...