Indoor-unit cooling-medium-flow distribution control method of one-drive-multi air-conditioner

Abstract

A one-driving-multiple air conditioner indoor unit refrigerant flow distribution control method refers to heat-making operation control method of one-driving-multiple air conditioner consisting of one outdoor unit connected with plurality of indoor units. It contains stages of sharing stage for plurality of indoor units interchanging conduit temperature value; each indoor unit confirming mutual operating state comparing judging stage from already commutative conduit temperature value; regulating stage for regulating refrigerant flow rate. Indoor electromagnetism expansion valve regulates fed refrigerant flow rate according to each indoor unit operating state, capable of preventing refrigerant flow rate imbalance and raising thermal manufacture efficiency.

Description

technical field [0001] The invention belongs to the field of air conditioning, and in particular relates to a one-to-many air conditioner that prevents low heating efficiency caused by unbalanced distribution of refrigerant flow between indoor units and distributes refrigerant to all indoor units evenly to improve heating efficiency. Disclosed is a method for controlling the flow distribution of refrigerant in an indoor unit of an air conditioner. Background technique [0002] Generally, a multiple air conditioner is an air conditioner in which multiple indoor units are connected to one outdoor unit, and the outdoor unit is used together so that each of the multiple indoor units can be used as a refrigerator or a heater. [0003] Such prior art drags many air conditioners such as figure 1 or figure 2 As shown, a plurality of indoor units installed in each room, that is, the indoor unit 10 in room A, the indoor unit 20 in room B, the indoor unit 30 in room C, and the outdo...

AI Technical Summary

Problems solved by technology

[0012] However, in the prior art one-to-many air conditioner, the indoor units 10, 20, 30 and the outdoor unit 40 perform transmission and reception at a ratio of 1:1, so the heating efficiency of the indoor units 10, 20, 30 is unbalanced.

[0013] That is to say, if indoor units with the same capacity have different models, the performance of the indoor heat exchanger will be different. , the difference in the height of the installed ducts, the shape of the duct branches, or the degree of bending of the ducts) are different, and there are also deviations in heating performance between indoor units

[0014] Therefore, when the electromagnetic expansion valve of the outdoor unit is controlled by the average temperature of the indoor pipe in order to send the refrigerant flow rate to each indoor unit as before, the overall refrigerant flow rate can be satisfied, but the refrigerant flow rate deviation may occur between the indoor units due to the above reasons. And because of this, the indoor electromagnetic expansion valve is fully opened and operated, so the function of refrigerant flow regulation is lost, and the overall heating efficiency of the one-to-multi-air conditioner is reduced.

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