Anti-explosion control method for outdoor unit modules of multi-coupled air-conditioning unit in transportation
A multi-connected air-conditioning and control method technology, applied in air-conditioning systems, heating methods, space heating and ventilation, etc., can solve problems such as large economic losses, leakage of refrigerants, safety accidents, etc., to protect the environment, avoid bursting, avoid troublesome effect
Active Publication Date: 2013-09-25
NINGBO AUX ELECTRIC
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Problems solved by technology
When transporting the outdoor unit module, there are the following disadvantages: after the factory produces the outdoor unit module, the liquid refrigerant is injected into the high pressure area of the module, that is, the outdoor heat exchanger behind the compressor, and then transported, and the liquid refrigerant injected into the outdoor unit module Restricted by the check valve between the oil separator and the outdoor heat exchanger and the shut-off valve of the high-pressure liquid pipe, it accumulates in the outdoor heat exchanger, liquid reservoir and high-pressure liquid pipe. During transportation, due to The turbulence and vibration or the high temperature will cause the liquid refrigerant accumulated in the above-mentioned area to evaporate, causing the air pressure in the above-mentioned area to rise sharply. When the pressure value exceeds the pressure-bearing limit of the above-mentioned components, the weakest position in the above-mentioned area is the wall thickness. The coil of the thinnest outdoor heat exchanger will burst, and once the coil of the outdoor heat exchanger bursts, it will leak refrigerant, pollute the environment, cause large economic losses, and even cause safety accidents when it bursts. Moreover, The outdoor heat exchanger also needs to be repaired or replaced, which is very troublesome
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[0017] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0018] Such as figure 1 , figure 2 As shown, the explosion-proof control method when the outdoor unit module of the multi-connected air-conditioning unit of the present invention is transported, its specific steps are as follows:
[0019] a. Before transportation, add a first air pressure balance pipe 3 between the outdoor heat exchanger 1 and the gas-liquid separator 2 of each outdoor unit module of the unit, the first air pressure balance pipe 3 and the gas-liquid separator 2. A second air pressure balance pipe 7 connecting the two is also provided between the liquid reservoirs 4, and a mechanical pressure switch valve 8 with a critical pressure value of Pa is set on the first air pressure balance pipe 3, and the critical pressure value Pa is 4.2MPa~ 5.5MPa, preferably 4.5Mpa. The mechanical pressure switching valve 8 of the present inven...
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The invention discloses an anti-explosion control method for outdoor unit modules of a multi-coupled air-conditioning unit in transportation. The method comprises the following steps: a. before transportation, a first air pressure balance pipe (3) is additionally arranged between an outdoor heat exchanger (1) and a gas-liquid separator (2) of each outdoor unit module, and a mechanical pressure switch valve (8) is arranged on the first air pressure balance pipe (3); and b, in transportation, the mechanical pressure switch valve (8) monitors the pressure value P0 of the outdoor heat exchanger (1) of the outdoor unit module in real time, once the P0 is greater than or equal to a critical pressure value Pa, the mechanical pressure switch valve (8) is open, and refrigerant which is accumulated in the outdoor heat exchanger (1), a liquid storage device (4) and a high-pressure liquid pipe (5) is diffused into the gas-liquid separator (2), a compressor and an oil separator (9) through the first air pressure balance pipe (3). A coil of the outdoor heat exchanger can be prevented from cracking through the adoption of the control method.
Description
technical field [0001] The invention relates to a multi-connected air-conditioning unit, in particular to an explosion-proof control method for transporting outdoor unit modules of the multi-connected air-conditioning unit. Background technique [0002] The multi-connected air conditioner unit in the prior art includes a plurality of outdoor unit modules connected in parallel, a plurality of indoor unit modules, and two refrigerant circulation main pipes connecting each indoor unit module and each outdoor unit module, and the plurality of outdoor unit modules are connected in parallel, parallel The last outdoor 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, outdoor heat exchanger (condenser in cooling mode, evaporator in heating mode), throttling device, liquid receiver and gas-liquid separator The outlet of...
Claims
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IPC IPC(8): F24F1/06
Inventor 郑坚江侯丽峰赵世婷
Owner NINGBO AUX ELECTRIC