Circulation timing system for elevator air conditioner
A timing system and air-conditioning technology, applied in heating and ventilation control systems, heating and ventilation safety systems, applications, etc., to achieve the effect of saving manpower and power resources
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[0016] as attached figure 1 As shown, the cycle timing system for an elevator air conditioner of the present invention includes a power supply module, a timing module, a drive module, and a display and input module.
[0017] Specifically, as attached figure 1 As shown, the rectifier bridge composed of diodes D1-D4 and capacitors C7 and C12 constitute a capacitor step-down circuit, which serves as a power module to provide a stable 12V DC voltage for the system.
[0018] The timing module of the present invention uses the MC68H(R)C908JK3E type single-chip microcomputer. The single-chip microcomputer MC68H (R) C908JK3E has 20 pins and integrates the interface of 16-bit timer. This microcontroller uses 5V DC voltage. Among them, the pin 5 is connected to a 5V DC power supply, and the pin 3 and pin 4 are connected to the output of the 8MHz crystal oscillator circuit. The crystal oscillation circuit is composed of R12 and quartz chip, pin 18 and pin 19 are timer output interfac...
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