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The Control Method of Preventing Refrigerant Drift Flow During Heating of Multi-connected Air Conditioning Units

A multi-connected air conditioner and control method technology, applied in space heating and ventilation, heating and ventilation control systems, household heating, etc., can solve the problem of poor heating effect, affecting the promotion and application of multi-connected air conditioners, and waste of refrigerant and other problems, to achieve the effect of preventing refrigerant drift

Active Publication Date: 2011-12-14
NINGBO AUX ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Once the refrigerant flow is biased, the outdoor unit with more refrigerant will accumulate too much refrigerant, causing waste, while the indoor unit with less refrigerant will have a poor heating effect, and the heating effect of each indoor unit cannot be guaranteed. Popularization and Application of Type Air Conditioning

Method used

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  • The Control Method of Preventing Refrigerant Drift Flow During Heating of Multi-connected Air Conditioning Units
  • The Control Method of Preventing Refrigerant Drift Flow During Heating of Multi-connected Air Conditioning Units

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Embodiment Construction

[0024] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0025] Such as figure 1 As shown, the control method for preventing refrigerant bias flow when the multi-connected air conditioner unit of the present invention is heating, the specific steps are as follows:

[0026] a. Start and run the compressor 1 of the outdoor unit for a period of time, specifically, start and run the compressor 1 of any outdoor unit of the multi-connected air conditioner unit for a period of time.

[0027] The period of time described in step a refers to 10 to 30 minutes, preferably 15 minutes.

[0028] b. Measure the temperature T in the middle of the indoor heat exchanger 2 of each indoor unit through the temperature sensor 3 in the middle of the indoor heat exchanger 2 of each indoor unit 0 , and send the temperature measurement result to the main controller of the air conditioner, the temperature T in the middle of ...

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Abstract

The invention discloses a control method for preventing bias flow of refrigerants during heating of a multi-connected air conditioning unit. The method comprises the following steps of: a, starting the multi-connected air conditioning unit; b, measuring a middle temperature T0 of an indoor heat exchanger (2), wherein an indoor machine of which the T0 is the highest has the most refrigerants, and the indoor machine of which the T0 is the lowest has the fewest refrigerants; c, measuring an outlet temperature T1min of the indoor heat exchanger (2) of the indoor machine which has the fewest refrigerants, measuring an outlet temperature T1max of the indoor heat exchanger (2) of the indoor machine which has the most refrigerants, and calculating a difference value delta T between the T1min and the T1max; d, judging whether the delta T is more than or equal to 5, if so, increasing the aperture of an indoor machine electronic expansion valve (4) of the indoor machine which has the fewest refrigerants, and decreasing the aperture of the indoor machine electronic expansion valve (4) of the indoor machine which has the most refrigerants; and e, repeating the steps b to d at certain intervalsuntil the multi-connected air conditioning unit is shut down. By the method, heating effect of each indoor machine is better, and waste is avoided.

Description

technical field [0001] The invention relates to a multi-connected air-conditioning unit, in particular to a control method for preventing refrigerant bias flow when the multi-connected air-conditioning unit is heating. Background technique [0002] The multi-connected air conditioner unit in the prior art includes one or more outdoor units, a plurality of indoor units connected in parallel, and two refrigerant circulation main pipes connecting each indoor unit and each outdoor unit. If there is one outdoor unit, the outdoor unit is connected to multiple indoor units connected in parallel through two refrigerant circulation main pipes; if there are multiple outdoor units, multiple outdoor units are connected in parallel, and the parallel outdoor units pass through two refrigerant circulation main pipes Connect with the indoor unit connected in parallel. [0003] Each outdoor unit includes compressor, oil separator, four-way reversing valve, outdoor heat exchanger (evaporator...

Claims

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Application Information

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IPC IPC(8): F24F11/00
Inventor 郑坚江侯丽峰
Owner NINGBO AUX ELECTRIC
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