A frequency converter thermal management system for an air-conditioning unit and an air-conditioning unit

A technology of air-conditioning units and frequency converters, applied in the direction of mechanical equipment, etc., can solve problems such as complex control, control valves and pipelines, reduce complex process procedures, improve reliability and applicability to working conditions, and eliminate internal condensation Effect

Active Publication Date: 2022-08-02
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 prior art, the cold plate and the air-cooled evaporator are often configured in parallel. The cold plate is often controlled by an expansion valve with stepless adjustment capability, while the air-cooled evaporator is often controlled by a solenoid valve with intermittent adjustment capability. Plates are often controlled by expansion valves with stepless adjustment capabilities, while air-cooled evaporators are often controlled by solenoid valves with intermittent adjustment capabilities, that is, the two are controlled independently, not only the control valves and pipelines that need to be configured are complicated, but also The corresponding control is also more complicated

Method used

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  • A frequency converter thermal management system for an air-conditioning unit and an air-conditioning unit
  • A frequency converter thermal management system for an air-conditioning unit and an air-conditioning unit

Examples

Experimental program
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Effect test

Embodiment 1

[0030] like figure 1 As shown, the inverter thermal management system of the air-conditioning unit in this embodiment includes a inverter cooling circuit 4 whose ends are respectively connected to the condenser 2 and the main evaporator 3 in the refrigeration system of the air-conditioning unit, and the inverter cooling circuit 4 includes a A cooling circuit 41 for cooling the power modules of the inverter (including rectifiers, inverters, reactors, etc.) and a refrigerant evaporation circuit 42 for cooling the air inside the inverter; the inlet end of the cooling circuit 41 is connected to the condenser through the first pipeline. 2 are connected, the outlet end of the cooler 411 is connected to the inlet end of the refrigerant evaporation circuit 42 through the second pipeline, and the outlet end of the refrigerant evaporation circuit 42 is connected to the inlet end of the main evaporator 3 . Specifically, the cooling circuit 41 includes a cooler 411, and each power module ...

Embodiment 2

[0046] like figure 2 As shown, the only difference between this embodiment and the first embodiment is that the switch unit 43 further includes a second switch module 432 (such as a solenoid valve or a throttle valve, etc.) located on the first pipeline, and the throttle valve is an electronic expansion valve, a thermal expansion valve, capillary tube or orifice plate), through the cooperative control between the second switch module 432 and the first switch module 431, it is possible to realize any temperature control under the full temperature range of the air-conditioning unit, so that the inverter can operate in special units and No over-temperature and no condensation under working conditions, improving reliability and applicability of working conditions, especially suitable for units with high power level and high temperature of condenser 2. Other undescribed contents are the same as those in the first embodiment, and are not repeated here.

[0047] Of course, in other...

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Abstract

The invention discloses a frequency converter thermal management system for an air conditioning unit, comprising a frequency converter cooling circuit whose ends are respectively connected with a condenser and a main evaporator in a refrigeration system of the air conditioning unit, and the frequency converter cooling circuit includes a frequency converter cooling circuit for cooling the power of the frequency converter The cooling circuit of the module and the refrigerant evaporation circuit for cooling the air inside the inverter are connected in series with each other. The invention also discloses an air conditioning unit, comprising a refrigeration system and a frequency converter. The refrigeration system includes a compressor, a condenser and a main evaporator. The inlet end of the compressor is connected to the main evaporator, and the outlet end is connected to the main evaporator. The condenser is connected to the inverter, and the inverter is provided with the inverter thermal management system of the air-conditioning unit as described above. The two ends of the inverter cooling circuit in the inverter thermal management system are respectively connected to the condenser and the main evaporator. connected. The thermal management system and the air-conditioning unit of the present invention have the advantages of simple structure, anti-condensation, low cost and high reliability.

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 unit and an air conditioner unit. 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, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24F11/33F24F11/65F24F11/84
CPCF24F11/33F24F11/65F24F11/84
Inventor 何亚屏马明邓明罗何喻通李嘉文亮李诗怀王幸智
Owner CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
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