Control method and system for variable frequency air conditioner
A frequency conversion air conditioner and control method technology, applied in heating and ventilation control systems, heating and ventilation safety systems, heating methods, etc., can solve the problems of slow discharge, electric shock, etc., to avoid electric shock, avoid the danger of electric shock, and reduce waiting time. effect of time
Active Publication Date: 2018-11-23
HISENSE (SHANDONG) AIR CONDITIONING CO LTD
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Problems solved by technology
However, the problem brought about by this method is that when the power is cut off, the power of the switching power supply will be discharged quickly, and the indicator light of the weak current will be extinguished soon, but the energy of the strong current part will be discharged very slowly because there is no fast discharge circuit. , if the strong current indicator light is damaged, the maintenance personnel will mistakenly think that the machine is out of power when they see that the indicator light is not on during operation, which may cause the risk of electric shock
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[0034] In the following, the present invention will be specifically described through exemplary embodiments. It should be understood, however, that elements, structures and characteristics of one embodiment may be beneficially incorporated in other embodiments without further recitation.
[0035] In the description of the present invention, it should be noted that: (1) figure 2 and image 3 The middle arrow represents the current trend; (2) the structure and the connection relationship of the drive MCU, inverter, compressor, main control MCU, main loop control switch and drive power supply control switch are technologies known to those skilled in the art, so the present invention is for those skilled in the art. I won't go into details here.
[0036] In order to reduce the waiting time for maintenance and avoid the risk of electric shock, see Figure 1 to Figure 3 , the present invention provides a method for controlling an inverter air conditioner, comprising the followin...
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The invention provides a control method and system for a variable frequency air conditioner. The control method includes the following steps that the steps of a discharge program are started, whereinwhen a variable frequency air conditioner is in a shutdown or standby state after startup and there is no startup request during continuous T1 time, a command of a main control MCU is received, and the discharge program used for discharging of a strong electricity part is started; the steps of the discharge program are executed, wherein direct current bus voltage low voltage detection faults and alternating current input current detection faults are shielded, and meanwhile an inverter is controlled so as to change the current direction of a compressor winding in cycle. The control system applies the above control method. According to the system and the method, when the air conditioner is shut down or in the standby state for a long time, after a main circuit power supply is switched off, the waiting time for maintenance can be reduced, and meanwhile occurrence of electric shock hazards is avoided.
Description
technical field [0001] The invention belongs to the technical field of air conditioners, and in particular relates to a control method and a control system for an inverter air conditioner. Background technique [0002] Since the energy efficiency requirements of products in various countries are getting higher and higher, and the energy efficiency is generally calculated using the seasonal energy efficiency ratio, the contribution of reducing the standby power consumption of air conditioners to energy efficiency is becoming more and more important, so how to reduce the standby power consumption of air conditioners is generally considered in product design. power consumption. [0003] A common way to reduce standby power consumption is to first cut off the power supply of the drive part during standby, and then turn off the weak power supply of the drive part, leaving only the switching power supply at work. However, the problem brought about by this method is that when the ...
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IPC IPC(8): F24F11/64F24F11/88
CPCF24F11/64F24F11/88
Inventor 安丰德陈建兵高思云牛建勇
Owner HISENSE (SHANDONG) AIR CONDITIONING CO LTD