Multi-connected air conditioning outdoor unit, multi-connected air conditioning system and small load operation control method thereof
A multi-connected air conditioner and outdoor unit technology, which is applied in the direction of air conditioning system, heating and ventilation control system, heating and ventilation safety system, etc. It can solve the problems of affecting user comfort, increasing system oil discharge, affecting system reliability, etc. problems, to achieve the effect of improving the reliability of the system operation, increasing the evaporation temperature, and improving the comfort of use
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[0044] The present invention will be further described below through specific embodiments.
[0045] A multi-connected air-conditioning system and a control method for its small-load operation, such as figure 1The multi-connected air conditioning system shown includes: a compressor 100 having an exhaust port 101 and an air return port 102; a first check valve 110, the input end 111 of the first check valve 110 is connected to the The exhaust port 101 of the compressor 100 is connected; the first four-way valve 120, the first four-way valve 120 has a first port 121, a second port 122, a third port 123 and a fourth port 124; A four-way valve 130, the second four-way valve 130 has a first port 131, a second port 132, a third port 133 and a fourth port 134, the first port 131 of the second four-way valve 130 and the first port 131 After the first interface 121 of a four-way valve 120 is connected in parallel, it is connected to the output end 112 of the first one-way valve 110; th...
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