Method for reducing refrigerant flowing sound on multi-couple indoor unit side
A technology of flow noise and connected internal unit, which is applied in the field of noise reduction of air conditioners, can solve the problem of loud flow noise of refrigerant, and achieve the effect of suppressing flow sound of refrigerant
Inactive Publication Date: 2020-12-04
MITSUBISHI HEAVY IND HAIER QINGDAO AIR CONDITIONERS CO LTD
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Problems solved by technology
[0003] The present invention provides a method for reducing the flow sound of the refrigerant on the side of the multi-connected indoor unit, and overcomes the problem of the large flow sound of the refrigerant in the existing multi-connected duct air conditioner
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[0020] In the existing multi-duct air conditioner, in order to ensure the normal operation of the compressor, it is necessary to provide enough oil for the compressor to ensure the lubrication effect of the internal parts of the compressor. However, when the compressor discharges the refrigerant during operation, it will bring out the refrigerant Oil, the current hardware is to strip the oil through the oil separator and the gas-liquid separator to bring the oil back to the compressor, but it is not enough to return the oil only through the hardware. The software is often designed to control the oil return and bring it back through the high-speed flow of the return air. Press oil.
[0021] Such as figure 1 As shown, during the start-up process of the internal unit, in the existing control scheme, the frequency of the compressor is increased to a higher frequency such as 40Hz after start-up, and at the same time, the opening of the electronic expansion valve is controlled to be...
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The invention provides a method for reducing refrigerant flowing sound on a multi-couple indoor unit side. The method comprises the following steps: during starting of a cold room, the frequency of acompressor is controlled to be the lowest frequency, and the opening degree of an indoor unit electronic expansion valve is controlled to be the initial opening degree; during oil return of the cold room, the opening degree of a shutdown indoor unit electronic expansion valve is subjected to zoning control at the opening degree of P1-P2 according to the size of the machine type; during oil returnor defrosting of a warm room, the opening degree of a startup indoor unit electronic expansion valve is subjected to the zoning control at the opening degree of P3-P4 according to the size of the machine type, and the opening degree of the shutdown indoor unit electronic expansion valve is subjected to the zoning control at the opening degree of P3-P4 according to the size of the machine type. According to the method, different opening degrees of the electronic expansion valve are designed according to the capacity of the indoor unit, so that the effects of oil return, defrosting and the likeof an outdoor unit cannot be affected, and refrigerant flowing sound generated when a refrigerant flows through the indoor unit can be well inhibited.
Description
technical field [0001] The invention belongs to the technical field of air-conditioning noise reduction, and in particular relates to a method for reducing the flow sound of refrigerant on the side of multiple indoor units. Background technique [0002] With the improvement of living standards, multi-duct air conditioners have gradually entered thousands of households. In addition to requiring the air conditioner to have good cooling and heating effects, users also pay attention to the comfort of the air conditioner. Noise improvement is to improve the comfort of the air conditioner. important aspects of sex. At present, with the continuous in-depth exploration of the silent design of air conditioners, the fan noise of air conditioners is getting smaller and smaller, and the reduction of fan noise makes the refrigerant flow sound obvious. Therefore, solving the problem of refrigerant flow sound is very important for noise improvement. . The refrigerant of the multi-duct ai...
Claims
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Patent Timeline
Login to View More IPC IPC(8): F25B49/02
CPCF25B49/02F25B2500/12F25B2600/2513
Inventor 柳东营五十住晋一相金波
Owner MITSUBISHI HEAVY IND HAIER QINGDAO AIR CONDITIONERS CO LTD