The operating principle of the thermostatic faucet: A thermoelement is installed at the outlet of the thermostatic valve core. The characteristics of the temperature-sensing element are used to promote the movement of the valve body of the valve body, and the inlet and outlet of the cold and hot water are blocked or opened, while blocking the cold water. Turn on the hot water. When the temperature control knob is set to a certain temperature, the proportion of hot and cold water that enters the water outlet also automatically changes, so that the outlet water temperature is always kept constant. The thermostat can be arbitrarily set between 35°C and 65°C. The thermostatic mixer will automatically maintain the set outlet temperature.
The thermostatic faucets on the market use memory alloys, paraffin wax, and pressure-regulating valves in three ways to achieve a constant temperature effect. In general, the memory alloy thermostatic faucet is sensitive to temperature changes and has a small temperature deviation, making it the first choice for thermostats. Thermostatic faucet requires high production process. It is recommended to purchase large brands to ensure quality.
â—†Faucet product quality authentication
1. Visual inspection: (1) Plating surface: The surface of a good faucet is smooth, spotless, free of defects such as plating, pinholes, and blisters, and vice versa. (2) Plating: A good faucet has a thicker coating and brighter color. On the other hand, the thinner faucet has a dark color.
2, hand touch: hand touch without burr; gently move the handle, should be light and flexible, non-blocking sense; check the assembly of each component is tight, no loose feeling.
3, check: Check the completeness of supporting parts, common leading parts and accessories are: hose, rubber gasket, shower, go to water, kidnapper, decorative caps and so on.
â—† Use and maintenance
When using a thermostatic faucet, lightly turn off the light, do not use too much force, and often use excessive pressure to break the valve stem to damage the valve core. After a period of use, the surface of the faucet is dirty, or because the dirt in the water may cause the flow to decrease, or the temperature control becomes out of control, maintenance is required at this time.
1, the faucet surface hanging dirt: generally use a soft cotton cloth can be wiped, just like people wash their face. In order to keep the faucet shining, you should often use a soft cotton cloth to dip it with a neutral detergent. Rinse with water. Normally every three or two days can be cleaned. Pay attention to the surface of the faucet to avoid soda.
2. Internal maintenance: (1) Close the cold and hot water inlet valve. (2) Unscrew the inlet nuts on both sides of the faucet with a wrench, remove the wire mesh gasket, check valve, and clean the dirt on the surface of the screen. Check if the check valve is working properly. If not, replace it. (3) Unscrew the screw with a 3 mm hex wrench and pull the hand wheel until the hand wheel pulls out of the faucet housing together with the valve plug, clean the dirt on the surface of the valve plug filter, and then align the threaded hole on the valve plug with the main body of the faucet. Hole, push the valve plug into the body and tighten the screw.
â—† The main defects of the thermostatic mixer:
1, thermostatic rod
It is understood that in 2003 there were very few factories for such products, and it was required to use a thermostat made in France for thermostats in factories. However, there have been more domestic thermostat factories since 2004. Due to the high process requirements of mud-like heat-sensing materials, the author is also very doubtful about the service life of thermostats on the market.
In addition, there is a piece of rubber film between the temperature-sensing package (slim-like temperature sensing material) and the ejector rod, and the rubber film is fixed relative to the temperature-sensing package, and the rubber film is caused by the thermal expansion, contraction and spring action of the temperature-sensing material. When concave, convex, so the rubber film is easy to cause rupture, resulting in leakage of temperature sensing material, and quickly lead to oxidation, and ultimately make the thermostatic valve core out of action.
2. Check Valves: Thermostatic faucets produced by many factories. Check valves are made of plastic materials. Because it is always under pressure and temperature, the plastic of the check valve is prone to aging and can easily be damaged. The general life will not exceed 2 years.
3, water pressure: thermostat water pressure has a certain requirement, the general requirements in the 0.1-0.5Mp, there are cold, hot water pressure difference can not be too much. If the hot water pressure of the thermostatic faucet is less than 0.05, it is recommended not to buy a thermostatic faucet.
4, temperature: hot water temperature generally requires 49-80 degrees.
5, water quality: If the water quality is poor, the piston of the valve plug is easy to get stuck, causing constant temperature failure.
In addition, the most important point is that if the hot water comes from the gas water heater, if the flow adjustment of the water heater is inconsistent with the thermostat, the thermostat will be very likely to lose its function. Please pay attention when purchasing it!
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