Water heater
1. Configuration.
Type |
Specialty |
Excellence |
shortcoming |
Others |
Transflux heater |
Water transflux hole of the heater |
Large power, quick heating |
Water must flow by itself or by a pump. |
Water can be heated in tap water supply |
Immerging |
Heater immerge at bottom of water tank |
Heat quiet water, with uniform temperature |
Rising time is too long to heat the water in whole tank |
Fit for large power |
Underside heater |
Heater is placed underside the tank |
Heat quiet water, with uniform temperature |
Rising time is too long to heat the water in whole tank |
Fit to maintain temperature of water |
Double insulators heater |
With two layers insulators and two metal shells |
Top safety |
Higher cost |
No electric leakage on surface when PTC was burn |
periphery of pipe heater |
Around the periphery of metal pipe |
The heater can contact the pipe very fit |
The power can not be large; energy can not be used very effectively |
Suitable for the situation the pipe can not be changed |
Temperature control water heater |
With a temperature controller,the temperature of the water can be adjusted |
The temperature of water Can be controlled with accuracy of 4℃ |
Larger volume of the system, more cost. |
Suitable for the situation necessary to control the temperature of water |
Various materials.
1) Aluminium shell or pipe, it is cheaper, but not good in resistance to corrosion.
2) Brass or copper shell or pipe, it is good in resistance to corrosion. But it costs higher.
3) Ceramic shell, it’s good in resistance to corrosion. But its heating power could not be very large.
4) Stainless steel or titanium shell or pipe, it is very excellence for preventing corrosion, and meets food safe standard. But it costs higher and has bigger bulk. China patent number: ZL 2011 2022 0811.4, ZL 2011 2022 0805.9.
5) Anti-corrosion coated aluminum shell, it is corrosion resistance, and prevent incrustant, but the cost is quite high.
2. Some samples of uses.
PTC water heater could be used for shower, footbath, washing hand, vegetable and dish, drink warmer and boiler, fermenter, tea warmer, coffee warmer, milk warmer, vapor generator, sauna bath.
They could be used in heating diesel oil, gasoline or other liquid. Using PTC as a heating element could prevent the oil burning, it’s safer.
3. Notice in appliance.
PTC as a heating element, it fits for high safety, slap-up product. In some situations, it’s low cost and convenient.
The electric power of PTC water heater changes with the temperature of water. The higher is the temperature of water, the smaller is the power.
Using higher switch temperature PTC can get higher power, 220~270℃switch temperature PTC is selected usually. But if select too high switch temperature, the reliable will reduce.
Power is almost same to change the voltage twice or decrease of 1/2.
4. Current products.
Immerging heater
Shape |
Length in water |
width |
Thickness |
Screw or flange |
Surface temp. in air |
Power |
Rectangle aluminum tube |
100mm |
9.7 |
6 |
M14 |
250℃ |
70W |
Rectangle aluminum tube |
100mm |
13.2 |
6 |
M20 |
250℃ |
150W |
Rectangle aluminum tube |
100mm |
15.5 |
6 |
M22 |
250℃ |
180W |
Rectangle aluminum tube |
100mm |
16.5 |
11 |
M24 |
250℃ |
350W |
Rectangle aluminum tube |
100mm |
21.5 |
6 |
M25 |
250℃ |
250W |
Rectangle aluminum tube |
100mm |
21.5 |
12 |
M30 |
250℃ |
450W |
Rectangle aluminum tube |
200mm |
21.5 |
24 |
M42 |
250℃ |
2000W |
Rectangle aluminum tube |
200mm |
31 |
12 |
flange |
250℃ |
1800W |
Rectangle aluminum tube |
150mm |
32 |
7 |
flange |
250℃ |
400W |
+ shape aluminum tube |
400mm |
39 |
39 |
flange |
250℃ |
8000W |
+ shape aluminum tube |
500mm |
48 |
48 |
flange |
250℃ |
10000W |
Rectangle aluminum tube |
200mm |
65 |
7 |
flange |
240℃ |
1800W |
Round aluminum tube |
100mm |
|
Φ8 |
M12 |
250℃ |
100W |
Round aluminum tube |
100mm |
|
Φ11 |
M14 |
250℃ |
150W |
Round aluminum tube |
100mm |
|
Φ16 |
M20 |
250℃ |
200W |
Round aluminum tube |
200mm |
|
Φ23 |
M30 |
250℃ |
1200W |
Round aluminum tube |
200mm |
|
Φ33 |
M42 |
250℃ |
1800W |
Round aluminum tube |
200mm |
|
Φ40 |
M48 |
250℃ |
2400W |
Round aluminum tube |
500mm |
|
Φ48 |
M56 |
250℃ |
6500W |
Round brass tube |
75mm |
|
Φ12 |
M16 |
240℃ |
100W |
Stainless steel/titanium tube |
200mm |
|
Φ10 |
M14 |
240℃ |
200W |
Stainless steel/titanium tube |
200mm |
|
Φ20 |
M24 |
240℃ |
400W |
Stainless steel/titanium tube |
200mm |
|
Φ25 |
M30 |
240℃ |
1100W |
Stainless steel/titanium tube |
400mm |
|
Φ35 |
M42 |
240℃ |
2000W |
Stainless steel/titanium tube |
400mm |
|
Φ45 |
M52 |
240℃ |
3000W |
Stainless steel/titanium tube |
500mm |
|
Φ50 |
M56 |
240℃ |
4000W |
Stainless steel/titanium tube |
500mm |
|
Φ50 |
M56 |
240℃ |
8000W |
Stainless steel double insulators |
200mm |
|
Φ25 |
M30 |
240℃ |
900W |
Stainless steel double insulators |
400mm |
|
Φ35 |
M42 |
240℃ |
1800W |
T shape |
Plane |
86/74 |
Heater |
55/40/8 |
260℃ |
350W |
T shape |
Plane |
86/74 |
Heater |
55/40/22 |
260℃ |
800W |
Notice:
1) PTC heating tube can be operated without water, low water level, incrustant depositing.
2) Applied voltage could be 12~72V, 100~380V. Two applied voltages in one heater; three phase voltage are possible.
3) The length of heating part could be selected between 50~800mm, the longer is the shell, the larger is the power.
4) The connected screw or flange could be customer made.
5) The surface temperature without water, could be between 50~260℃, the higher is this temperature, the larger is the heating power.
6) The stable temperature of water would be affected by the heating power, cubage of water, the shape and material of container, heating dispersion, evaporating of water, temperature controller.
7) The tube can be consist of aluminum, copper, brass, 304/316/316L stainless steel, titanium, monel alloy. The life time for aluminum tube is around 2years, for stainless steel is around 5years continuously operation.
8) For preventing corrosion, the surface of tube can be coated with Teflon, used for heating element in electroplate tank is possible.
9) A thermostat or thermo-couple or sensor can be assembled in the tube for controlling the temperature of water.
10)TUV approval number: B 09 06 46746 004,B 09 08 16746 008.
11) National patent, ZL 2010 2 01356626.0, high power density water heater.
National patent, ZL 201320630141.2, surround PTC heating tube.
National patent, ZL 2011 2022 0811.4, anti-corrosion PTC heating tube.
National patent, ZL 2011 2012 6016.9, Used for special high security, there are 2 layers of insulator and 2 layers of metal protective layer. That can prevent the electricity leakage on the heater caused by breakdown of PTC ceramic.
National patent, ZL 201520425957.0, PTC heating element used in electroplate tank.
National patent, ZL 201520103573.7, PTC heating element used in three phases.
National patent, ZL 201520103574.1 PTC heating element applied with multi voltage.
Transflux water heater:
Shape |
Total length |
Width |
Height |
Innerdiameter of pipe |
Terminal screw |
Surface temp. without water |
Power |
Aluminum pipe |
150mm |
21.5 |
20.5 |
Φ10 |
2/8” |
250℃ |
380W |
Aluminum pipe |
150mm |
21.5 |
23.5 |
Φ13 |
3/8” |
250℃ |
400W |
Aluminum pipe |
300mm |
21.5 |
23.5 |
Φ13 |
3/8” |
250℃ |
820W |
Aluminum pipe |
200mm |
21.5 |
25 |
Φ13 |
3/8” |
250℃ |
1200W |
Aluminum pipe |
200mm |
33 |
48 |
Φ26 |
1” |
240℃ |
1500W |
Aluminum pipe |
200mm |
39 |
39 |
Φ16 |
4/8” |
250℃ |
3500W |
Aluminum pipe |
200mm |
48 |
48 |
Φ15 |
4/8” |
250℃ |
4500W |
Aluminum pipe double insulating + |
200mm |
48 |
48 |
Φ15 |
4/8” |
250℃ |
4500W |
tainless steel/titanium pipe# |
250mm |
26 |
35.5 |
Φ15 |
4/8” |
250℃ |
1000W |
Stainless steel/titanium pipe# |
250mm |
35.5 |
35.5 |
Φ15 |
4/8” |
250℃ |
1800W |
Copper pipe # |
250mm |
35.5 |
35.5 |
Φ15 |
4/8” |
250℃ |
2000W |
Stainless steel/titanium pipe# |
500mm |
Φ48 |
Φ28 |
1” |
240℃ |