A method and device for controlling the speed of an external fan, and a multi-connected air conditioner
A speed control and external fan technology, applied in heating and ventilation control systems, air conditioning systems, heating methods, etc., can solve the problems of high energy efficiency of multi-connected air conditioners and not receiving too much attention
Active Publication Date: 2022-03-29
NINGBO AUX ELECTRIC +1
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Problems solved by technology
At present, for the judgment of the energy efficiency of multi-connected air conditioners, the annual performance system is generally used, and the energy efficiency of low-load operation has not received much attention, resulting in relatively high energy efficiency of multi-connected air conditioners in low-load operation.
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Embodiment
[0047] see figure 1 , this embodiment provides a method and device for controlling the speed of an external fan, which is applied to a multi-connected air conditioner 10. The method and device for controlling the speed of an external fan provided in this embodiment can reduce the power of the fan during low-load operation and improve the speed of the multi-connected air conditioner. Energy efficiency of the air conditioner 10 during low load operation.
[0048] The multi-connected air conditioner 10 includes an outdoor unit and a plurality of indoor units. The outdoor unit is connected to the indoor unit through pipes and branch pipes, and the indoor unit can be controlled to cool or heat. Since the multi-connected air conditioner 10 adopts one outdoor unit to drive multiple indoor units, it has many advantages such as saving energy consumption, saving design, saving space, and saving construction. In actual usage, there is a 60% probability that one indoor unit is turned on,...
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The invention provides a method and device for controlling the speed of an external fan, and a multi-connected air conditioner, and relates to the technical field of air conditioners. The method for controlling the speed of the outdoor fan includes: responding to the startup command, controlling the start of the multi-connected air conditioner; obtaining the total load of the multi-connected air conditioner; judging whether the total load is less than or equal to the preset load; if the total load is less than or equal to the preset load, obtain the low-pressure value of the multi-split air conditioner; control the speed of the external fan according to the low-pressure value. When the total load is less than or equal to the preset load, it means that the current load of the multi-connected air conditioner is small. At this time, controlling the fan speed according to the low pressure value can reduce the power consumption of the fan during low-load operation and improve the efficiency of the multi-connected air conditioner. Energy efficiency of air conditioners at low loads.
Description
technical field [0001] The present invention relates to the technical field of air conditioners, in particular to a method and device for controlling the speed of an external fan and a multi-connected air conditioner. Background technique [0002] A multi-connected air conditioner includes an outdoor unit and multiple indoor units. The outdoor unit is connected to the indoor unit through pipes and branch pipes, and can control the cooling or heating of the indoor unit. Since the multi-connected air conditioner uses one outdoor unit to drive multiple indoor units, it has many advantages such as saving energy consumption, saving design, saving space, and saving construction. In actual usage, there is a 60% probability that one indoor unit is turned on, and a 30% probability that two indoor units are turned on. In other words, the multi-connected air conditioner is in low-load operation state 90% of the time during use. . At present, the judgment of the energy efficiency of m...
Claims
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IPC IPC(8): F24F1/0003F24F11/61F24F11/64F24F11/65F24F11/86F24F11/871F24F11/88
CPCF24F1/0003F24F11/61F24F11/64F24F11/65F24F11/86F24F11/871F24F11/88
Inventor 刘永超刘合心陈华张稳
Owner NINGBO AUX ELECTRIC