APPARATUS FOR CONTROLLING VARIABLE VALVE WITH PROTECTION CIRCUIT IN COOLING AND HEATING SYSTEM USING COLD OR HOT WATER AS AN ENERGE SOURCE AND POWER SUPPLY APPARATUS FOR VARIABLE VALVE

摘要

The present invention relates to a variable valve control device and a variable valve power supply device for a cooling and heating system using cold and hot water as a heat source, wherein the variable valve control device for a cooling and heating system using cold and hot water as a heat source includes operation mode information including a cooling mode or a heating mode, and A control unit for blocking, opening or proportionally controlling the variable valve based on state information of the fan coil unit including temperature information of the fan coil unit; A power circuit unit for generating a valve driving power supplied to the variable valve driving device for driving the variable valve; A switching unit which receives a valve driving power as an input from the power supply circuit unit and switches on/off switching of the valve driving power to the variable valve driving device, and a switching unit having a bias resistance connected in parallel with the switching device; A load short circuit detection unit that receives a valve driving power from the switching unit as an input and detects a load short circuit when a load short circuit occurs in the variable valve driving apparatus; When a load short circuit is detected from the load short circuit detection unit, the switching unit is turned off to block the supply of the valve driving power to the variable valve device. If no load short circuit is detected, the switching unit is turned ON to drive the valve to the variable valve. It includes a switching driver for supplying power.