Noise reduction control method and device for multi-split air conditioner and multi-split air conditioner
A multi-connected air conditioner and control method technology, applied in noise suppression, heating and ventilation control systems, heating methods, etc., can solve the problem of large opening of the expansion valve of the indoor unit, easy noise generation of the indoor unit, insufficient refrigerant supercooling, etc. problems, to achieve the effect of improving user experience, avoiding noise, and reducing the temperature of refrigerant
Active Publication Date: 2021-08-03
NINGBO AUX ELECTRIC +1
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Problems solved by technology
[0002] In the refrigeration or dehumidification operation of the multi-connected air conditioner, when the multi-connected air conditioner enters the oil return mode, the refrigerant needs to carry oil, the expansion valve of the indoor unit is opened larger, the frequency of the compressor increases, and the refrigerated oil in the air conditioning system is carried by the refrigerant. However, when the oil return mode ends, a large amount of refrigerant is still stored in the liquid storage tank of the outdoor unit, and the subcooling degree of the refrigerant entering the indoor unit is insufficient. When adjusting the expansion valve of the indoor unit according to the pipe temperature, It is easy to misjudge that the air-conditioning system is in a state of lack of refrigerant, resulting in the expansion valve of the indoor unit opening too large, and the refrigerant in the air-conditioning system is in a gas phase state, which will produce an obvious airflow sound when flowing through the indoor unit, causing the indoor unit to generate noise
Therefore, the existing multi-connected air conditioner still has the problem of low user experience due to the noise generated by the indoor unit after the oil return mode
Method used
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[0061] Judging whether the current exhaust high pressure is greater than the first preset high pressure value Pd 预设 , or, determine whether the current exhaust gas temperature is greater than the first preset temperature Td 预设 .
[0062] Get current exhaust high pressure Pd 2 And the exhaust temperature of the compressor (also called the exhaust temperature) Td 2 , to determine the exhaust high pressure Pd 2 Whether to satisfy Pd 2 >Pd 预设 , if yes, it is determined that the exhaust pressure of the air conditioning system is too high. The above-mentioned first preset high pressure value Pd 预设Can be the high pressure upper limit of the air conditioning system. Or, judge the discharge temperature Td 2 Whether Td is satisfied 2 >Td 预设 , if yes, determine the exhaust temperature is too high. The above-mentioned first preset temperature Td 预设 The value range can be 90 ~ 100 ℃.
[0063] When the current exhaust high pressure is greater than the first preset high pressure...
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The invention discloses a noise reduction control method and device of a multi-split air conditioner and the multi-split air conditioner, and relates to the technical field of air conditioners. The noise reduction control method for the multi-split air conditioner comprises the following steps that a current operation mode of the multi-split air conditioner is monitored; when the multi-split air conditioner starts a refrigeration mode or a dehumidification mode to run, running state information of the multi-split air conditioner is monitored, wherein the running state information involves compressor frequency; and when the multi-split air conditioner quits an oil return mode, the opening degrees of expansion valves of all indoor units of the multi-split air conditioner and the frequency of a compressor are controlled in a staged mode based on the operation state information till the actual supercooling degree of the multi-split air conditioner is increased to the preset supercooling degree. According to the noise reduction control method and device for the multi-split air conditioner and the multi-split air conditioner, the noise of the air conditioner is reduced, and the use experience of a user is improved.
Description
technical field [0001] The invention relates to the technical field of air conditioners, in particular to a noise reduction control method and device for a multi-connected air conditioner, and a multi-connected air conditioner. Background technique [0002] In the refrigeration or dehumidification operation of the multi-connected air conditioner, when the multi-connected air conditioner enters the oil return mode, the refrigerant needs to carry oil, the expansion valve of the indoor unit is opened larger, the frequency of the compressor increases, and the refrigerated oil in the air conditioning system is carried by the refrigerant. However, when the oil return mode ends, a large amount of refrigerant is still stored in the liquid storage tank of the outdoor unit, and the subcooling degree of the refrigerant entering the indoor unit is insufficient. When adjusting the expansion valve of the indoor unit according to the pipe temperature, It is easy to misjudge that the air-co...
Claims
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Patent Timeline
Login to View More IPC IPC(8): F24F11/30F24F11/64F24F11/65F24F11/84F24F11/86F24F11/88F24F13/24
CPCF24F11/30F24F11/64F24F11/65F24F11/84F24F11/86F24F11/88F24F13/24F24F2013/247
Inventor 肖旭东黄春陈东邹富强吉金浩
Owner NINGBO AUX ELECTRIC