What is the principle of thermostatic valve core of thermostatic faucet? It can control the water temperature within a certain range.

The principle is to pour high-purity special paraffin into a small copper container with a rubber sensor on the lid. Due to the change of water temperature, the volume of paraffin in the container also increases and decreases, and then the sensor at the container mouth drives the spring to push the piston to adjust the mixing ratio of cold and hot water.

because the thermostatic valve core is a very precise device, the internal machining of the valve core thermostatic faucet shell is required to be very precise, and the tolerance of all internal machining dimensions should be limited within ±.1mm, and the tolerance of important dimensions must be controlled within .5 mm..

constant temperature faucet is suitable for shower facilities in homes, hotels, public bathrooms, barbershops and other environments where the water pressure often changes.

Extended data

Paraffin thermostatic valve core always has some shortcomings, such as slow reaction speed and too large instantaneous temperature Overshoot. The instantaneous temperature exceeding value refers to that when the thermostat adjusts the temperature, it first crosses the target temperature instantly, and then it is adjusted to the target temperature again. The instantaneous override value of paraffin thermostatic valve core is about 5℃ ~ 1℃.

The shape memory alloy spring is the most important part in p>SMA thermostatic valve core. The effective working temperature range of the shape memory alloy spring made of Ni-Ti alloy is ℃ ~ 1℃.

SMA thermostatic spool has extremely fast reaction speed, and the instantaneous temperature overshoot can be controlled below 2℃. Moreover, the SMA thermostatic valve core is extremely sensitive at around 4℃, which can meet the needs of users for stepless fine adjustment.

In the SMA thermostatic valve core, the shape memory alloy spring itself not only acts as a temperature sensing element, but also pushes the piston to adjust the mixing of cold and hot water, and the mixed water can also pass through the spring, thus saving valuable space and making the thermostatic valve core more exquisite.

Baidu encyclopedia-constant temperature faucet