ptc heater technology

PTC heater technology and function

The PTC ceramic heater manufactured by the company with patented technology is composed of PTC ceramic heating module and corrugated aluminium strip by high temperature adhesive. This type of PTC heater has the advantages of low thermal resistance and high heat transfer efficiency. It is an electric heater with automatic constant temperature and power saving. One of its prominent features is its safety performance. Under any application conditions, there will be no "red" phenomenon on the surface of heaters such as electric heat pipes, which will cause potential safety hazards such as burns and fires.

The most notable characteristics are:

1. provinces cost, long life.

Without special temperature controllers and thermocouples for temperature feedback, the heater can be heated. Its temperature regulation depends on its own material characteristics, so that the product has a much longer service life than other heaters.

2. safety, green environmental protection.

The design heating temperature of the heater body is below 200 degrees Celsius. In any case, the body is not reddish and has a protective isolation layer. No heat insulation materials such as asbestos are needed for cooling treatment in any application occasion. It is safe to use the heater body without burning or causing fire.

3. save electricity.

Comparing the heating products of electric heat pipe and resistance wire, this product relies on the characteristics of material itself and adjusts its thermal power output according to the change of environmental temperature, so it can optimize and control the energy consumption of heater to a minimum, and the material with high heating efficiency also greatly improves the utilization efficiency of electric energy.
The temperature is fast and when the fan is in trouble, it can also automatically control the temperature and prolong the service life.

A wide range of voltage can be designed between 12V-380V according to need.

It is easy to design, can be designed from small to high power, and the shape can be designed as required.

• non burning, safe and reliable. PTC is not red when exposed to heat.

In medium and small power heating occasions, PTC heater has incomparable advantages over traditional heating components, such as constant temperature heating, no open fire, high heat conversion rate, little influence by power supply voltage, long natural life, etc. The application of PTC heater in electric heating appliances is becoming more and more popular with R&D engineers.

Use attention

(1) PTC heater sheet has the characteristics of automatic constant temperature. It does not need the temperature control system. It can be directly energized by PTC heater sheet.

(2) When PTC heater is used to heat liquid (such as water), the PTC heater will not be damaged after the liquid is dried.

(3) if the PTC heater plate is used to heat the cold air, the PTC heater plate will not be damaged when the wind is not supplied.

(4) the service life is long, and the service life is more than 10 years.

(5) reliable operation, using PTC heater plate internal characteristics of temperature control, will never exceed the temperature.

(6) the working voltage is very wide: when the working voltage changes 2 times, the surface temperature changes very little.

(7) when multiple PTC heater plates are used together, they should be connected in parallel and not connected in series.

(8) different heating conditions make the heating power of PTC heater plate vary greatly.

(9) the heating power is large to small after being energized and finally stabilized. The stable power is related to the operating conditions. If the same PTC heater is used under different conditions, the power may differ several times. The faster the heat dissipation, the greater the stable power; the higher the surface temperature of PTC, the higher the power.

(10) The surface temperature of PTC heater is controlled by PTC itself or by disconnecting circuit, but it can not be controlled by adjusting voltage.

(11) PTC itself has high reliability and long life, but if it is not properly assembled, the power and temperature of the product will be unstable.

(12) when multiple PTC are used together, they should be connected in parallel and not concatenate.

what is wax heater？

Wax heater is a device specially designed for heating dehairing honey wax. Soft or hard, can melt and keep it at the optimum temperature, and it is very convenient. It can be said that wax heater is essential for home beauty.

The structure of wax heater is quite simple. It is generally composed of PTC Heater, LED and Plug. This PTC heater suite is widely used in wax melting equipment, depilator, odor heater and so on.

The characteristics of PTC Heater are:

1.PTC type ceramic heater saves cost and longevity.

Without special temperature controllers and thermocouples for temperature feedback, the heater can be heated. Its temperature regulation depends on its own material characteristics, so that the product has a much longer service life than other heaters.

2.PTC ceramic heater is safe and green.

The heater body is designed to be heated at temperatures below 200 degrees Celsius, under any circumstances.

The body is not red and has protective isolation layer. No application of asbestos and other insulation materials is required in any application.

After cooling treatment, it can be assured that there is no problem of scalding and fire.

3. The PTC ceramic heater saves electricity.

Comparing the heating products of electric heat pipe and resistance wire, this product relies on the characteristics of material itself and adjusts its thermal power output according to the change of environmental temperature, so it can optimize and control the energy consumption of heater to a minimum, and the material with high heating efficiency also greatly improves the utilization efficiency of electric energy.

Wax heater

Do you really know about ceramic band heaters?

Ceramic band heaters are not made of ordinary mica wire, but of ceramic wire, so the power of the product is 0.5 to 1.5 times higher than that of ordinary products. The heating body is made of imported round silk pottery, which is flexed into a spring and inserted into the ceramic strip. The outer cover is made of stainless steel made in Japan, and the insulation cotton (aluminum silicate fiberboard) is used in the middle to prevent temperature leakage. Ceramic heating ring ceramic strip is a high-frequency ceramic with fast heat transfer, hard and not fragile, high temperature deformation is not easy to aging characteristics.

Ceramic band heaters：

1. Fast heat transfer, uniform heating and stable operation.
2. Ceramic band heaters temperature does not leak, can save electricity, the cover touch hands not hot, work safety.
3. The power of the product is high. The power of the ceramic bar through wire is 0.5~1.5 times higher than that of the ordinary one.
4. European and American high-temperature heating wire, with fast heat dissipation, uniform heating, high temperature stability and other characteristics, can be used for a long time at 600-800 C.
5. The product life is long, because raw materials aging at high temperature is slower, so the product has a long life.
6. In line with the national GB technical requirements. The power deviation is +5% - 10%.
7. Electrical strength: voltage 1500v/50Hz sine alternating voltage test, 1MIN no breakdown phenomenon.

The first condition of Ceramic band heaters forming is the interaction between powder and water hardening, and then the reinforcement of the binder part. A certain time of static has an important impact on the final forming effect. When the mold has a preliminary hardness, according to different types of additional measures to further strengthen the force, such as through heating, vacuum drying, ultraviolet light irradiation and so on. After this process is completed, the mold has a strong hardness, which requires the removal of other powder from the surface and the brush to sweep away most of the surrounding powder. The remaining less powder can be removed by mechanical vibration, microwave vibration, wind blowing in different directions. It has also been reported that molds are immersed in special solvents which can dissolve dispersed powders, but can not dissolve solidified molds to remove excess powders.

For moulds finished with powder, especially for moulds made of gypsum base, Tao Ciji and other absorbent materials. Also need to consider its long-term preservation problem, the common method is to brush a layer of waterproof curing adhesive outside the mold, increase its strength, to prevent weakening due to water absorption. Or the mold can be immersed in a protective polymer, such as epoxy resin, cyanoacrylate, molten paraffin, the final mold can be waterproof, strong, beautiful, not easy to deform and so on.

vsec elec. - ceramic band heaters

what is a ptc heater ?

Many customers don't know what PTC heater is or how PTC heater works, so today we'll give you a brief introduction to PTC heater.

PTC heater is also known as PTC thermistor ceramics, it is a kind of semiconductor functional ceramics with positive temperature coefficient. PTC resistance decreases with the increase of temperature before the transition temperature. The resistance increases significantly with the increase of temperature from the transition temperature to the thermal runaway temperature.

PTC heater has many advantages, such as constant temperature heating, long natural life, energy saving, no open fire, good safety performance, easy regulation of heat and less affected by power supply voltage. Domain.

The PTC heater can be made into various shapes and specifications according to the requirements.

Scope of application:

Heating fan, air conditioning heating, dryer, mosquito killer, motorcycle carburetor, automotive damper door, automotive cold start preheating, electric humidifier, electrical instrument moisture-proof heating plate (plate), massager, thermotherapy device, melt gun, curling hair, hair straightener heating, coffee heater, milk heater, boiling water heater, water heater, steam Beauty, etc.

Production process of PTC heater：

PTC heater refers to the automatic temperature control PTC ceramic heating body, is a special ceramic material. The principle of constant temperature heating of PTC heater is: when PTC heater is energized, because the resistance at room temperature is small, the initial current is large, which can make PTC heater heating up quickly, and lead to the resistance value rapidly increasing into the transition zone. At this time, the current through PTC heater is very small, so that the surface temperature of PTC heater remains constant. The temperature is only related to Curie temperature and applied voltage of PTC heater, but has nothing to do with ambient temperature. The production process of PTC heater is as follows:

https://www.vsec.top/news/what_is_a_ptc_heater.html

All kinds of PTC thermistors

PTC thermistors for degaussing circuits. Characterized by no contact, no noise, long life. The product is used in the demagnetizing circuit of color CRT. It can effectively demagnetize the magnetized CRT shading board due to the influence of magnetic field and improve the color barrier. Models are: MZ71, MZ72, MZ73, MZ1, MZ2, MZ3, etc.

SMD SMT PTC thermistor. This resistor is flat sheet, suitable for mass production of PCB chip packaging, higher efficiency, low defect rate.

High polymer PTC thermistor. This kind of PTC is often found in PPTC self-recovery fuse, which has the function of over-current and over-heat protection, and can be restored. Under normal conditions, the low resistance state, once the phenomenon of overcurrent occurs, the PPTC thermistor self-heating to increase its impedance to suppress the current to a small enough to protect the secondary circuit.

The PTC heater has the characteristics of constant temperature, temperature regulation and automatic temperature control. It is also safe, reliable and has a long life. When the PTC heater is heated, the resistivity is very low below the Curie point temperature; once the temperature exceeds the Curie point, the resistivity increases sharply, so that the current drops to a stable value, so as to achieve automatic control of temperature, constant temperature and other purposes. Widely used in tea disinfection cabinet, coffee machine, chocolate machine, electric mosquito repellent, thermostat, physiotherapy, heater and other electrical appliances.

PTC thermistors are started by motors and motors. This kind of resistance is usually found in disc structure of optical sheet. It is more suitable for clamping contact mode and more suitable for single-phase induction motor. The PTC motor starter is one of the most important components for motor startup.

Power type PTC thermistor. Usually PTC thermistors are connected in series in the power supply circuit. Normally, the current flowing through the PTC is less than the rated current, and the resistance value is very small. When the circuit current greatly exceeds the rated current, the PTC suddenly heats, the resistance value suddenly increases to the high resistance state, thus limiting or blocking the current, and protecting the back circuit from damage.

DS18B20 temperature sensor waterproof test

Hello everyone.

Today we show you our waterproof DS18B20 temperature sensor.

The following is a very simple waterproof test to verify that the waterproof DS18B20 works properly underwater.

Firstof all we have to prepare a Vsec waterproof DS18B20 temperature sensorand a single chip microcomputer, of course, also need a glass of water.

Thenwe link the DS18B20 temperature sensor to the microcontroller, andfinally put the DS18B20 temperature sensor into the prepared water.

From the above picture we can see, in fact, the waterproof DS18B20 temperature sensor and ordinary DS18B20 temperature sensor in use is no difference, the difference is only waterproof.

DS18B20 temperature sensor waterproof test

Advantages of ptc fan heater

1.What is ptc heater?

ptc heater is a positive temperature coefficient thermistor. It is a ceramic heating element. Characterized by a certain operating temperature range, its resistance value increases sharply with the increase of temperature, and can be stabilized in a certain operating temperature range.

2. Advantages of ptc fan heater

The ptc fan heater is extremely safe because when the working temperature of the ptc heater reaches Curie point, its resistance value increases sharply with the temperature rising, forcing the output power to drop rapidly. When the fan stops running and there is no air-dry burning, the maximum temperature of the internal parts of the machine is limited to (specific) 240 C, which effectively avoids the problem. This is the most outstanding feature of other electric heaters.

The energy saving effect of ptc fan heater is very significant. This is because the output power of ptc heater decreases significantly with the increase of ambient temperature. The output power of ptc heater decreases about 1800W at 20 C when the air flow is unchanged at 2.1m3/min. When the ambient temperature rises to +20 C, the output power of ptc heater decreases to about 1500W with an average increase of 1 C, and the output power decreases about 7W. This characteristic plays a role of automatic power regulation to a certain extent, it can also be understood that the lower the room temperature, the greater the output power of ptc heater, the faster the heating; conversely, with the increase of room temperature, the output power of ptc heater gradually decreases, the slower the heating rate.

Power is also a notable feature of ptc fan heater. ptc fan heater uses forced convection to heat the room temperature, because the coefficient of heat transfer of forced convection air is many times that of natural convection, so the heat transfer area needed to transfer the same heat is much smaller, so ptc fan heater can be made compact and portable, its volume and weight can be as small as the same power electrothermal cement. About 1/5, which is very suitable for hanging walls.

Immersion water heater with thermostat use matters needing attention

Immersion water heater with thermostat use matters needing attention

1. components are allowed to work under the following conditions:

A. air relative humidity is not greater than 95%, no explosive and corrosive gases. (excluding explosion-proof heater)

B. The working voltage of should not exceed 1.1 times the rated value, and the enclosure should be effectively grounded.

C. insulation resistance is greater than 1M ohm dielectric strength: 2KV/1min.

2. Electric heat pipe should be fixed and positioned. The effective heating zone must be immersed in liquid or metal solids. No air burning is allowed. When dirt or carbon deposit is found on the surface of the tube, it should be cleaned up and reused in time so as to avoid heat dissipation and shorten the service life.

3. When heating fusible metals or solid salts of nitrate, alkali, leaching, paraffin, etc., the applied voltage should be lowered first, and after the medium is melted, it can be raised to the rated voltage.

4. When heating air, the elements should be arranged evenly and cross-wise, so that the elements have good heat dissipation conditions, so that the air flowing through can be fully heated.

5. heating nitrate should consider safety measures to prevent explosion accidents.

6. The wiring part should be placed outside the insulation layer to avoid contact with corrosive, explosive media and moisture; the wiring should be able to withstand the temperature and heating load of the wiring part for a long time; the wiring screw should be tightened to avoid overexertion.

7. The components should be stored in a dry place. If the insulation resistance is lower than 1M for a long time, the components can be dried in the oven at about 200 degrees Celsius or heated by lowering the voltage until the insulation resistance is restored.

Vsec elec.

What is the use of tubular heater with thermostat?

Tubular heaters are widely used to heat air, oil, water, chemical solvents, molds, etc. It is a very general heater. It consists of stainless steel seamless tube, spiral resistance wire and crystalline magnesia powder. It has excellent overall performance, long life and easy maintenance.
The spiral resistance wire is evenly distributed in the stainless steel seamless tube, and the crystalline magnesium oxide powder with good thermal conductivity and insulation property is filled in the gap. The structure is compact, the thermal efficiency is high, the heating is uniform, and the heat generated by the resistance wire is transferred to the stainless steel seamless tube through the magnesium oxide powder and diffused to the metal. The surface of the tube is heated by means of heat conduction and thermal radiation to achieve the purpose of heating up.
Tubular heaters can configure pipe diameter, size, heating power and end fixing mode according to customer requirements.

Internal structure of cartridge heater with thermocouple

In the cartridge heater, a cartridge heater with a thermocouple is bred in the hope of detecting the temperature at certain points. Carridge heater with a thermocouple is used to detect temperature by adding a K or J thermocouple into it, but the position of the thermocouple is different, so the temperature position of the thermocouple is different.

1. bottom grounding type

The thermocouple is placed at the bottom of the tube and communicated with the shell of the electric heating tube. Because the temperature measuring node at the bottom can be in close contact with the mold, the temperature sensing speed is fast, and the process structure is suitable for all sizes of electric heat pipe.

2. pipe bottom non grounding type
The temperature sensing speed is slower than the contact structure at the bottom of the tube, and is often used as reference temperature.

3. tube intermediate grounding type
It is suitable for measuring the inner temperature of an electric heating pipe with a length of more than 80 mm, and plays an over-temperature monitoring role.

4. tube intermediate non grounding type

It is suitable for measuring the temperature of the inner wall of the shell of the electric heat pipe, which is longer than 80 mm. It is widely used as a reference for the temperature of the shell of the electric heat pipe.

immersion water heater

immersion water heater (flanged heater) as the name implies is the electric heater immersed in the liquid for heating, the main characteristics of the electric heater immersed in the liquid, the energy emitted by the electric heater are absorbed by the liquid heater, so energy efficiency is very high, coupled with small size, easy to control and other advantages, is widely used in petroleum. Chemical and metallurgical fields.

The company provides customized design and manufacturing of immersion water heater (flanged heater). Users can specify the shape, parameters, material and other requirements of the use of scenarios. Our company will customize more suitable heating products according to customer needs.

ds18b20 temperature sensor pack up for shipment to customers.

I always feel happy at work, though the weather in Shenzhen is not very good today.

One hundred DS18B20 temperature sensor pack up for shipment to customers.

We are Shenzhen Vsec Electronics Co., Ltd. We specialize in DS18B20 temperature sensor and other temperature sensors, including various resistors, power, wire and size.

If you have any need, you can contact us anytime.

how does a silicone heater work

The silicone heate plate is generally divided into two kinds, 220V and 380V, and the current is 1.5A. silicone heater sheet (SCS), that is, silicone rubber heater sheet (heating sheet), also known as silicone rubber heater gasket / electric heating film / electric hot strip /electric heating sheet, oil drum heater / heating belt / heating plate and so on, are called different. It is made up of two glass fiber cloth and silicon rubber glass fiber cloth made of double chip silicon bonding. Because it is a thin sheet product (the normal thickness is 1.5mm), it has good flexibility and can be completely in close contact with the heated object. It is flexible, easy to get close to the heater, and the shape can be changed to design heating, so that the heat can be transferred to any desired place.

Vsec Elec. - Silicone heater

Silicone heater delivery of our company

Silicone heater delivery of our company

How to design die cartridge heater?

When heating metal modules, plastic molds, or hot runners with a high-power mold cartridge heater, we usually insert it into a machined hole. However, the outer diameter of the cartridge heater and the clearance between the mounting holes have a direct impact on the service life of the cartridge heater. The gap is too big, the mold cartridge heater cooling effect is poor, the life is short; the gap is too small, the mold cartridge heater replacement is very difficult, encounter such a problem, what should wedo?

These lection of mounting hole size of cartridge heater is closely related to the heat density of heater. The temperature produced by different heat densities is different, and the expansion degree of casing is also different. Therefore, it is necessary to combine the relationship between the two to make a suitable mounting hole size.

Firstly, we determine the operating temperature of the heated object. Secondly, we select the heater suitable for size and power, and calculate its thermal density.

Thirdly, combined with the heat density and the temperature curve, we find the corresponding gap parameters.

Finally, according to the data found, choose the intermediate value to determine the final data.

(Example)Choose a 10 mm diameter mold cartridge heater, the size of the heater is 9.93 + 0.03 mm, we choose 10 m + 0.02 mm installation aperture, mold temperature 300 degrees, the maximum heat density of the electric heat pipe? What is the maximum power of an electric heating tube with a length of 200mm?

(1)By calculating the known data, we can get that the maximum gap between the installation hole and the electric heat pipe is 10.02-9.90=0.12mm. From the data point of view, the maximum heat density of the corresponding heater is 25W/cm2.

(2)According to the parameters mentioned above, the effective heating length of the 200 mm electric heat pipe can be calculated as 180 mm, and the maximum density is 25W/cm2. The maximum power can be obtained by the following formula: electric heat pipe power = thermal density *heating length * electric heat pipe diameter * 3.1416 = 25 * 18 * 3.1416= 1413W.

Points for attention in design of die cartridge heater

For the mold cartridge heater, the most important thing is to ensure that the heat generated by the heating rod can be transferred to the heating medium in time, reducing the temperature of the material inside the heating rod, so as to effectively improve the service life of the mold cartridge heater.

(1)The gap between the outer diameter of cartridge heater and its insertion aperture should be reduced as far as possible. Usually the gap between them is less than 0.1 mm. For example, the heating rod with 10diameter should be the aperture with 10.1 diameter.

(2)When machining mounting holes, the coaxiality and tolerance should be effectively guaranteed, such as using reamers and other tools to dress the machining.

(3)The mold cartridge heater should be installed before cleaning the residue left in the processing, such as organic oil and other residues, after heating will be carbonized, thus affecting the ability of heat conduction.

(4)There will be no problem in the use of the design voltage, the actual power can be calculated according to the following formula:

[use voltage / design voltage] * [use voltage / design voltage] * design power = power used.

An electric heat pipe with a rated voltage and power of 230V 500W and a voltage of 220V has a power of 418.6W, about 84% of the rated power.

 cartridge heater design

how to check a cartridge heater？

Carridge heater is simply a kind of conductive heating elements in electrical appliances, is an important member of the category of electric heating elements. Moreover, most electrical appliances need to use cartridge heaters, and they can't work properly without a cartridge heater. So cartridge heater is an indispensable part of the electric heating element.

Cartridge heater generally we can judge their professionalism and reliability through their manufacturability. The quality of electrical products is the most interesting issue. What are the differences in the quality of cartridge heaters made of different materials: cartridge heaters convert electrical energy into kinetic energy, which brings about the kinetic energy of machines. If the quality is not enough, then it will not lead to the normal work of the machine, thereby reducing efficiency.

Briefly speaking, what should be paid attention to when using cartridge heater: the voltage at work should not be greater than its rated voltage; the relative temperature of air should not be greater than 95%; the components of cartridge heater should be placed in a dry place; the cartridge heater should be positioned and fixed; the effective heating zone must be completely immersed in liquid or metal solids In the cartridge heater outlet end magnesium oxide powder, in the use of places to avoid contaminants and water infiltration, prevent accidents.