Compressor frequency reduction control method and device and unit
A control method and compressor technology, applied in heating and ventilation control systems, heating methods, mechanical equipment, etc., can solve problems such as grid voltage fluctuations, air conditioning protection shutdown, etc., to achieve the effect of improving user experience
Active Publication Date: 2022-07-08
GREE ELECTRIC APPLIANCES INC
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Problems solved by technology
[0005] The embodiment of the present invention provides a compressor frequency reduction control method, device and unit to at least solve the problem in the prior art that the power grid voltage fluctuations lead to the shutdown of the air conditioner protection
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[0022] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0023] It should be noted that the terms "comprising" and "having" in the description, claims and drawings of the present invention, as well as any modifications thereof, are intended to cover non-exclusive inclusion, for example, including a series of steps or units Processes, methods, systems, products or devices are not necessarily limited to those steps or units expressly listed, but may include other steps or units not expres...
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The invention discloses a compressor frequency reduction control method and device and a unit. The method comprises the steps that in the operation process of a compressor, whether the frequency reduction condition is met or not is judged; if the frequency reduction condition is met, whether the current weak magnetic angle is larger than a preset angle or not is judged, and the weak magnetic angle is the included angle between the output current vector of the compressor frequency converter and the d axis of the two-phase rotating coordinate system; and if the current flux weakening angle is larger than the preset angle, frequency reduction is conducted on the compressor according to the first frequency reduction speed, and the first frequency reduction speed is larger than the second frequency reduction speed. Under the conditions that the frequency reduction condition is met and the current weak magnetic angle is larger than the preset angle, the compressor is subjected to rapid frequency reduction, the current of the compressor is rapidly reduced, and therefore the current of the compressor is reduced in advance, shutdown protection is prevented from being triggered due to the fact that the current of the compressor is too large, and the service life of the air conditioner is prolonged without affecting the normal operation capacity of the air conditioner. The problem of air conditioner protection shutdown caused by power grid voltage fluctuation is solved, and the user experience is greatly improved.
Description
technical field [0001] The present invention relates to the technical field of compressor control, in particular, to a compressor frequency reduction control method, device and unit. Background technique [0002] During cooling, the higher the external ambient temperature, the greater the load of the air conditioning system. When the load is large, the compressor may always run at high frequency, and the output capacity of the inverter is maximized. [0003] Due to the unstable grid voltage or the influence of high-power electrical appliances, the grid voltage may drop. When the voltage drop is large, the output capacity of the inverter will be weakened, and the compressor current cannot be adjusted in time, resulting in protection shutdown. In the hot summer, every time the air conditioner is shut down is a torment for the user, which affects the user's comfort. [0004] Aiming at the problem of air conditioner protection shutdown caused by grid voltage fluctuation in the ...
Claims
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Login to View More IPC IPC(8): F24F11/49F24F11/64F24F11/86F24F11/88
CPCF24F11/49F24F11/64F24F11/86F24F11/88Y02B30/70Y02B40/00
Inventor 贺小林范晓坤范胜全章童
Owner GREE ELECTRIC APPLIANCES INC