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Refrigerant flow regulating system of multi-connected air-conditioning heat exchanger and regulating method thereof

A multi-connected air conditioner and refrigerant flow technology, applied in high-efficiency regulation technology, refrigerators, refrigeration components, etc., can solve problems such as uneven flow distribution of heat exchangers, low condensation pressure, and insufficient refrigerant circulation

Inactive Publication Date: 2012-02-08
QINGDAO HISENSE HITACHI AIR CONDITIONING SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, if the outdoor unit does not run for a long time, a large amount of liquid refrigerant will accumulate in the heat exchanger, which will eventually lead to insufficient refrigerant circulation when the entire system is running, affecting the overall operating performance of the unit and deteriorating the cooling effect of the indoor unit.
[0006] For the multi-unit unit formed by the combination of two modules, due to different installation conditions, such as the installation part of an individual outdoor unit close to the wall has poor heat dissipation effect, at this time, the condensation pressure of the outdoor unit is relatively high during cooling operation, and the other outdoor units combined with it The condensing pressure is low, and the distribution flow of each heat exchanger is uneven, so that the capacity of the heat exchanger cannot be fully utilized

Method used

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  • Refrigerant flow regulating system of multi-connected air-conditioning heat exchanger and regulating method thereof
  • Refrigerant flow regulating system of multi-connected air-conditioning heat exchanger and regulating method thereof
  • Refrigerant flow regulating system of multi-connected air-conditioning heat exchanger and regulating method thereof

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Experimental program
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Effect test

Embodiment 1

[0028] Such as figure 1 As shown, the multi-connected air conditioner heat exchanger refrigerant flow regulating system of this embodiment includes an indoor unit 1 and an outdoor unit 2, the outdoor unit 2 module is provided with a compressor 3 and a heat exchanger 4, and one end of the heat exchanger 4 is connected to a four-way The valve 5 and the other port of the heat exchanger 4 are provided with an electronic expansion valve 6, one end of the electronic expansion valve 6 is connected to the outlet of the heat exchanger 4, and the other end is connected to the branch pipe 7 in the system pipeline.

[0029] Such as figure 2 As shown, the multi-connected air conditioner heat exchanger refrigerant flow regulation method implemented in this implementation includes the following steps:

[0030] Step 101 system startup: all units of the outdoor unit module are turned on and run;

[0031] Step 102 collect data: collect the condensing pressure and the temperature Te of the re...

Embodiment 2

[0038] The similarities between this embodiment and Embodiment 1 will not be repeated, and the difference is:

[0039] Such as image 3 As shown, the multi-connected air conditioner heat exchanger refrigerant flow regulation method implemented in this implementation includes the following steps:

[0040] Step 201 system startup: some units of the outdoor unit module shut down;

[0041] Step 202 collect data: collect the ambient temperature Ta and the refrigerant temperature Te at the outlet of the heat exchanger;

[0042] Step 203 Calculate the temperature difference: Calculate the ambient superheat of the heat exchanger, that is: the ambient superheat of the heat exchanger=refrigerant temperature Te at the outlet of the heat exchanger−environment temperature Ta;

[0043] Step 204 judges whether the temperature difference is out of range: compare the superheat degree calculated in step 203 with the preset value range of the unit (such as: 2-4 degrees), if it exceeds the ...

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Abstract

The invention provides a refrigerant flow regulating system of a multi-connected air-conditioning heat exchanger. The opening of an electronic expansion valve at the outlet of the heat exchanger is controlled, and the supercooling degree or superheating degree at the outlet of each heat exchanger is detected and controlled so as to regulate the refrigerant flow of each heat exchanger. The regulating method comprises the following steps: (1) starting the system; (2) acquiring data; (3) calculating the temperature difference; (4) determining whether the temperature difference exceeds the range; (5) calculating the variation value of the electronic expansion valve; and (6) finishing the regulation and operating normally. According to the invention, the refrigerant flow of each heat exchanger is regulated effectively, and the whole refrigerating effect of the air-conditioning system is improved.

Description

[0001] technical field [0002] The invention relates to a heat exchanger refrigerant flow regulating system, in particular to a heat exchanger refrigerant flow regulating system suitable for multi-connected air conditioners and a regulating method thereof. [0003] Background technique [0004] At present, multi-connected air-conditioning units mostly adopt the modular combination type, which has good transportation advantages and flexible combination forms, and has gradually become the main product in the commercial air-conditioning market. The multi-connected air conditioner unit is a kind of air conditioner unit in which multiple outdoor units are connected in parallel and multiple indoor units are connected in parallel. This combination of multiple outdoor unit heat exchangers in parallel makes the condensing pressure of each heat exchanger different when the ambient temperature is different. Different, the distribution flow of each heat exchanger is not uniform,...

Claims

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Application Information

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IPC IPC(8): F25B41/04F25B41/06F25B49/02
CPCY02B30/70
Inventor 张文强李亚军丛辉崔明
Owner QINGDAO HISENSE HITACHI AIR CONDITIONING SYST
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