TRV

A thermostatic valve is a commonly used temperature control device, which works as follows:

The thermostatic valve typically contains a temperature sensing element (such as a thermistor or a thermocouple), a movable valve core, and a control device (such as a PID controller). When the temperature changes, the sensing element measures the ambient temperature and transmits a temperature signal to the control device.

The control device compares the target temperature set by the user with the actual temperature measured by the sensing element, and calculates a control signal based on the difference. This control signal is sent to the movable valve core to adjust the fluid flow by changing its position.

When the actual temperature is below the set temperature, the control device increases the control signal, opening the valve core wider to increase the fluid flow. This can increase the temperature by introducing more heat.

Conversely, when the actual temperature is higher than the set temperature, the control device reduces the control signal, causing the valve core to close or reduce its opening, thereby reducing the fluid flow. This can lower the temperature by reducing the heat input.

By continuously providing feedback and control based on the actual temperature, the thermostatic valve can maintain the ambient temperature within a range near the set value and achieve precise temperature regulation.