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Air conditioning unit

A technology for air-conditioning units and compressors, applied in refrigerators, compressors, refrigeration components, etc., can solve the problems of small pressure difference in the cooling system for supplying refrigerants, different working stages of power modules, and different heat dissipation, etc., to improve the temperature uniformity. , expand the working temperature area, and achieve the effect of differential adjustment

Active Publication Date: 2021-03-09
CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the actual operation process, in different stages of unit operation, the power module works in different stages, and the heat dissipation will also be different; for example, in the process of unit startup, the power is relatively large, but the pressure difference of the supply refrigerant cooling system is small, Causes a certain over-temperature risk to the start-up process, but currently there is no corresponding control and adjustment measures

Method used

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  • Air conditioning unit
  • Air conditioning unit
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Examples

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Embodiment 1

[0029] like figure 1 As shown, the air conditioning unit of this embodiment includes a refrigeration system and a frequency converter. The refrigeration system includes a compressor 1, a condenser 2, a main evaporator 3, a flasher 6 and a throttling unit 5. The inlet port of the compressor 1 is connected to the The main evaporator 3 is connected, and the outlet port is connected with the condenser 2. The throttling unit 5 includes a first throttling element 501, a second throttling element 502 and a third throttling element 503. The first throttling element 501 is located in the condenser 2 Between the flasher 6, the second throttling element 502 is located between the compressor 1 and the flasher 6, the third throttling element 503 is located between the flasher 6 and the main evaporator 3, and the frequency converter is provided with Inverter cooling unit 4, the inlet end of the inverter cooling unit 4 is connected to the condenser 2, the outlet end of the inverter cooling u...

Embodiment 2

[0040] like image 3 As shown, the difference between this embodiment and Embodiment 1 is that the setting positions of the first switch module 43 and the second switch module 44 are different. In this embodiment, each cooling branch 411 is provided with the first switch module 43 or / and the second switch module 44 , specifically, each cooling branch 411 is provided with a cooler 412 and a first switch module 43 , and each first switch module 43 is located on the cooling branch 411 corresponding to the outlet end of the cooler 412 . Each cooling branch 411 is equipped with a first switch module 43, which can independently adjust each cooling branch 411, improve the temperature uniformity of the cooler 412, and realize differential adjustment, which is suitable for the loss of each cooling branch 411 There are certain differences (such as different heat dissipation of power devices); on this basis, the first switch module 43 is located downstream of the cooler 412, compared t...

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Abstract

The invention discloses an air conditioning unit. The air conditioning unit comprises a refrigerating system and a frequency converter. The refrigerating system comprises a compressor, a condenser, amain evaporator, a flash evaporator and a throttling unit. The inlet end of the compressor is connected with the main evaporator, the outlet end of the compressor is connected with the condenser, andthe throttling unit comprises a first throttling element, a second throttling element and a third throttling element. The first throttling element is located between the condenser and the flash evaporator, the second throttling element is located between the compressor and the flash evaporator, and the third throttling element is located between the flash evaporator and the main evaporator. The air conditioning unit is characterized in that the a frequency converter cooling unit is arranged on the frequency converter; the inlet end of the frequency converter cooling unit is connected with thecondenser; and the outlet end of the frequency converter cooling unit is connected with the flash evaporator through a first selector switch and connected with the main evaporator through a second selector switch. The air conditioning unit has the advantages of being simple in structure, capable of preventing condensation, suitable for different working conditions and the like.

Description

technical field [0001] The invention mainly relates to the technical field of thermal management of power electronics, in particular to an air conditioning unit. 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 part is the heat of power devices, and the other part is the heat of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B1/00F25B41/31F25B41/37F25B49/02H05K7/20
CPCF25B1/00F25B49/02H05K7/20945F25B2600/05Y02B30/70
Inventor 何凯马明王春燕姚磊冯钊赞李奎吴辉田恩李诗怀
Owner CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
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