Sanhua (hangzhou) Micro Channel Heat Exchanger Co., Ltd.

Guangfei Wei

Qiang Gao

Jianlong Jiang

Haobo Jiang

A flat tube, a multi-channel heat exchanger, and an air conditioning and refrigeration system. The flat tube has n groups of flow channels extending in a length direction of the flat tube, and the n groups of flow channels are distributed to be spaced apart in a width direction of the flat tube; and a flow cross-sectional area of a first group of the flow channels is A, . . . , a flow cross-sectional area of kgroup of the flow channels is A, . . . , a flow cross-sectional area of an ngroup of the flow channels is An, 1<k≤n, A≥1.2A, and k is an integer greater than 1.

Flat tube, multi-channel heat exchanger, and air conditioning and refrigeration system

The present disclosure discloses a control method for an air conditioning system. The air conditioning system at least includes a compressor, a heat exchanger and a throttle device. The operation phase of the air conditioning system at least includes a start-up phase and a stable phase. The control method includes an action that in the start-up phase, the operating time of the compressor is set as t, when t is greater than 0 and less than 60s, an operating frequency F of the compressor is controlled to be less than 75 Hz, and a frequency rise speed per second Vof the compressor is controlled to be less than 1.25 Hz/s.

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Zhejiang, China

Guangfei Wei