PTC water heater, shower water heater. The power can be adjusted itself. When the water is dried, it's no trouble.
Notice for manufacturer and consumer:
PTC as heating element, it fits for high safety, slap-up product. Using to maintain temperature of water is very excellent and also low cost.
For getting higher power, let water flowing or convection, ensure compact assembling, and using high heat-conducting materials such as copper or aluminum. The power density is about 6W /cm2at 25 waterfor immerging heater or transflux heater. The higher temperature is the water, the lower is the power.
Using higher switch temperature PTC can get higher power, 220~270switch temperature PTC is selected usually. But if select too high switch temperature, the reliable will reduce.
2. Classify by structure for PTC heating
Type | Specialty | Excellence | shortcoming | Others |
Transflux heater | Water transflux hole of the heater | Large power, quick heating | Water must flow | It can be used to heat tap water supply |
Immerging heater | Heater immerge at bottom of water tank | It can be used to heat quiet water | It is long time to heat the water in whole tank | Used to maintain temperature of water |
Bottom heater | Heater put under bottom of water tank | It can be used to heat quiet water | It is long time to heat the water in whole tank | Used to maintain temperature of water |
