The method of air conditioner time delay protection
A time-delay protection and air-conditioning technology, applied in heating methods, space heating and ventilation, household heating, etc., to achieve the effects of protecting pressure balance, shortening power supply waiting time, and rapid cooling/heating
Active Publication Date: 2011-12-07
SICHUAN CHANGHONG ELECTRIC CO LTD
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However, the problem with this method is that when the indoor unit is powered on for the first time, since the outdoor unit is completely powered off at this time, it should immediately supply power to the outdoor unit to control the normal operation of the air conditioner, but the indoor unit cannot judge the time when the outdoor unit is powered off length
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[0026] like figure 1 The air-conditioning delay protection method of the present invention is shown, comprising:
[0027] a. If figure 2 The indoor unit discharge detection circuit shown includes a first resistor R0 and a parallel unit connected in series with it, wherein the first resistor R0 is connected to the 5V working voltage of the indoor unit MCU, and the parallel unit includes a second resistor R1 and a capacitor C in parallel, The tap of the input end of the parallel unit is connected to any AD port of the indoor unit MCU, and the indoor unit MCU detects the AD value of the residual voltage of the capacitor C through the analog-to-digital conversion of the 8-bit voltage of this port. The first resistor R0 is 3KΩ, the second resistor R1 is 660KΩ, and the capacitor C is 100uF / 10V;
[0028] b. After the MCU of the indoor unit is powered on, the AD value detected in step a is sampled at one time. After the sampling is completed, no further sampling is performed, and t...
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The invention relates to a delayed protection method for an air conditioner. The method comprises the following steps: a, providing an indoor unit discharge detection circuit, detecting an AD value of residual voltage of an external capacitor by using an indoor unit MCU (micro control unit); b, sampling the AD value detected in the step a when the indoor unit MCU is powered on and comparing the AD value with records in a time-AD table one by one to obtain a power-off time of an indoor unit; c, comparing the power-off time of the indoor unit obtained in the step b with a startup interval time of an outdoor unit, wherein if the power-off time of the indoor unit is greater than or equal to the startup interval time of the outdoor unit, the indoor unit immediately supply electricity for the outdoor unit; and if the power-off time of the indoor unit is less than the startup interval time of the outdoor unit, the indoor unit can supply electricity according to difference time between the power-off time of the indoor unit and the startup interval time of the outdoor unit. According to the air conditioner delayed protection method provided by the invention, the indoor unit can immediately supply electricity to the outdoor unit when the power-off time of the outdoor unit exceeds a given value; when the power-off time of the outdoor unit is lower than the given value, an immediate power supply can be realized only by waiting for the difference time, thus the waiting time of power supply can be shortened. By the adoption of the method, the pressure balance of the air-conditioning system can be protected well, and the air conditioner can perform refrigerating or heating rapidly.
Description
technical field [0001] The invention relates to a method for delay protection of an air conditioner. Background technique [0002] For household air conditioners, in order to protect the pressure balance of the compressor and the system, after the compressor stops, it must wait for a certain period of time before starting the compressor again. Especially for inverter air conditioners, the indoor unit is used to control the power on and off of the outdoor unit. Since the outdoor unit has a large-capacity filter capacitor, when the outdoor unit is powered off, the outdoor unit MCU (microprocessor) runs for a long time. For a period of time, because the electricity stored in the capacitor is not fully released through the discharge circuit, the MCU can continue to work, but at this time, because the 5V DC operating voltage of the indoor unit MCU and other chips is insufficient, the various values and communication data detected by the outdoor unit MCU etc. may be incorrect, ...
Claims
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IPC IPC(8): F24F11/00
Inventor 陈跃
Owner SICHUAN CHANGHONG ELECTRIC CO LTD
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