Dynamic Balance Control Method of Refrigerant During Heating in Multi-connected Air Conditioning Units
A multi-connected air conditioner and dynamic balancing technology, which is applied in the control input of air characteristics, space heating and ventilation control input, refrigeration and liquefaction, etc. Maintenance personnel workload and other issues, to increase labor intensity, simple, convenient and effective refrigerant bias flow, and solve the effect of refrigerant bias flow
Active Publication Date: 2017-10-17
NINGBO AUX ELECTRIC
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Problems solved by technology
But whether it is too much or too little is not conducive to the operation of the unit
However, in actual operation, especially when one outdoor unit is turned on alone, it is difficult to supplement the refrigerant in the most reasonable way. If the outdoor unit that is turned on is tested every time, the refrigerant will be released if there is too much refrigerant. Replenishing if a part is missing will inevitably greatly increase the workload of maintenance personnel, increase labor costs, and waste refrigerant, which is not practical.
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[0020] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0021] Such as figure 1 As shown, the method for controlling the dynamic balance of the refrigerant during heating of the multi-connected air conditioner unit according to the present invention, the specific steps are as follows.
[0022] a. Turn on an outdoor unit for normal operation. At this time, detect the ambient temperature Tao. If 7°C ≤ Tao < 20°C, go to step b. If 0°C ≤ Tao < 7°C, go to step c.
[0023] b. Detect the discharge temperature Td and discharge pressure Pd of the compressor 1 of the outdoor unit that is turned on. If Td≥95°C and Pd≤2.2Mpa are satisfied at the same time, enter step d; if satisfy Pd>3.4Mpa, enter step e; If neither the conditions for entering step d nor the conditions for entering step e are met, it means that there is no more refrigerant, and the normal operation continues.
[0024] c. Detect the exhaust te...
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The invention discloses a dynamic refrigerant balance control method used in the heating process of a multi-connected air-conditioner unit. The method includes the steps that once it is found that the exhaust temperature of started outdoor units is high, while the exhaust pressure is insufficient, the frequency of the initially-started outdoor units is reduced by 30% in the operation process, outdoor units originally turned off are made to operate at the frequency 30% the initial operation frequency of the initially-started outdoor units till it is found by detection that the exhaust temperature is lowered to be in the normal state and the exhaust pressure is increased to be in the normal state; once it is found that the exhaust pressure of the started outdoor units is overly large, the outdoor units originally turned off serve as adjusting outdoor units, electronic expansion valves of the adjusting outdoor units are opened, and the excessive part of refrigerant in system circulation enters outdoor heat exchangers of the adjusting outdoor units from the electronic expansion valves to be stored. By means of the method, the refrigerant of the started outdoor units can be adjusted automatically.
Description
technical field [0001] The invention relates to a multi-connected air-conditioning unit, in particular to a dynamic balance control method of a refrigerant when the multi-connected air-conditioning unit is heating. Background technique [0002] Large-scale shopping malls, office buildings and factories often use central air-conditioning, that is, multi-connected air-conditioning units, to adjust the room temperature. The multi-connected air conditioner unit in the prior art includes multiple outdoor unit modules, multiple indoor unit modules, and two refrigerant circulation main pipes connecting each indoor unit module and each outdoor unit module. Multiple outdoor unit modules are connected in parallel, and the outdoor unit modules after parallel connection The unit module communicates with the parallel-connected indoor unit module through two refrigerant circulation main pipes. [0003] Each outdoor unit module includes compressor, oil separator, four-way reversing valve,...
Claims
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IPC IPC(8): F24F11/00F25B49/02
CPCF24F11/30F24F2110/10F25B49/022
Inventor 侯丽峰涂虬
Owner NINGBO AUX ELECTRIC