Control method for pipeline noise of multi-connected air-conditioning system and multi-connected air-conditioning system
A technology of multi-connected air conditioners and control methods, which can be used in noise suppression, space heating and ventilation details, heating methods, etc., and can solve problems such as large initial opening and pipeline liquid flow noise.
Active Publication Date: 2021-08-24
NINGBO AUX ELECTRIC
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Problems solved by technology
[0005] In order to solve the above problems, the present invention provides a method for controlling pipeline noise of a multi-connected air-conditioning system and a multi-connected air-conditioning system. By controlling the opening degree of the electronic expansion valve of the indoor unit in the heating standby pipeline, the problem of noise caused by the standby pipe in the prior art is solved. The problem of pipeline liquid flow noise caused by the large initial opening of the electronic expansion valve of the indoor unit of the indoor unit, while ensuring the system reliability of the multi-connected air conditioning system
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[0036] In order to make the above objects, features and advantages of the present invention more comprehensible, specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0037] Such as Figure 1-2 As shown, a schematic diagram of a multi-connected air-conditioning system has one outdoor unit 1 and three indoor units 2, the three indoor units 2 are connected in parallel, and are connected to the outdoor unit and the compressor 3 respectively, and the pipeline of each indoor unit Indoor unit electronic expansion valve 6, gas pipe sensor 10 and liquid pipe sensor 11 are installed. In this embodiment, the first indoor unit is in the heating start state, and the second and third indoor units are in heating standby state, that is, multi-line The air conditioning system has one indoor unit startup pipeline and two indoor unit standby pipelines.
[0038] The method for controlling pipeline noise of a multi-connec...
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The invention provides a method for controlling pipeline noise of a multi-connected air-conditioning system and a multi-connected air-conditioning system. The multi-connected air-conditioning system includes an indoor mechanism heating start-up pipeline and an indoor mechanism heating standby pipeline, and an electronic expansion valve is arranged on the indoor unit pipeline. Control the opening of the electronic expansion valve on the indoor mechanical thermal standby pipeline and the opening and closing methods to control the noise of the indoor mechanical thermal standby pipeline. The control method of the present invention does not need to change the existing air-conditioning pipeline, only the control program logic of the electronic expansion valve opening of the indoor unit needs to be changed, which saves costs and ensures system reliability while controlling noise.
Description
technical field [0001] The invention relates to the technical field of air conditioning, in particular to a method for controlling pipeline noise of a multi-connected air-conditioning system and the multi-connected air-conditioning system. Background technique [0002] The multi-connected air-conditioning system has multiple indoor units used in parallel. In the heating mode, some pipelines of the indoor units are in the power-on state, and some pipelines are in the standby state. In order to ensure the reliability of the multi-connected air-conditioning system, the heating standby pipeline The electronic expansion valve of the indoor unit will maintain a certain opening degree, but the refrigerant in the heating state is generally in a gas-liquid two-phase state before the electronic expansion valve of the indoor unit. The refrigerant in the gas-liquid two-phase state contains a large number of air bubbles. When the refrigerant in the phase state passes through the small op...
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IPC IPC(8): F24F11/64F24F11/84F24F13/24
CPCF24F13/24F24F2013/247F24F11/64F24F11/84
Inventor 侯丽峰秦宪赵攀汪云强
Owner NINGBO AUX ELECTRIC