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Walk-in cooler multifunctional room (1)
author: supermarket refrigerated showcase category: walk-in display coolers Views: 557Time: 2016-08-22
walk-in cooler multifunctional room humidity sensing and control The humidity sensor probe is located on the upper wall of the multifunctional room. When the multifunctional room is set as a drying cabinet, the humidity sensor probe will walk- in cooler The humidity value becomes an electrical signal, which is output by pin 3 after being processed by the humidity sensor. The output voltage of the 3-pin humidity output terminal is generally lV~4V. The higher the humidity becomes, the higher the voltage output, but should not exceed 4V. The computer board judges the humidity of the drying cabinet according to the output voltage value of the 3 pin of the humidity sensor, and when the judged result humidity is greater than the set value, it supplies power to the heating wire of the 3 pin multi-function room, so that the heating wire starts to dehumidify. The
system protection is to protect the operation of the control system and the compressor, and the following rules are prioritized: ①In order to prevent temporary poor contact during plugging in the power supply, and to ensure the completion of the solenoid valve self-test, the compressor is allowed to work 4s after the power is turned on . ②The system should be powered on after a power failure. If the power failure time is less than one minute, it must be turned on after a delay of 3 minutes after power on. In other cases, the walk-in cooler compressor should be stopped for more than or equal to 10 minutes each time (except for exiting the self-test). ③When the system is powered on again, it will automatically operate according to the mode and settings before the power failure. ④ When the system crashes due to interference or other reasons, it can automatically reset and keep the E display before reset and run in the mode before reset. Door closing reminder When the refrigerator door is opened for more than 2 minutes, the computer board will output three pulses to the buzzer every 30s of isolation, and the buzzer will sound 3 times. After 10 minutes, the computer board stops the buzzer and forcibly turns off the light. Normal light control can not be restored until the door closing signal is detected.
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