I don t understand how heat pipes work, what is the working principle of electric heat pipes

It will also evaporate in the middle of the reflux.

However, the evaporation process in the middle of the process will reduce the temperature of the pipe wall in the middle of the pipe, so that the reflux can be further refluxed closer to the bottom.

If the liquid has not been able to flow back to the bottom, or if it is found that the heat pipe cannot effectively dissipate heat, it is likely that the heat dissipation efficiency of the heat pipe does not match the heat generation of the heating element, that is, the heat pipe is not properly selected, or the heating element is not heating normally due to failure.

In fact, there is no clear interface between the hot and cold ends of the heat pipe, and if it is in an open environment, it is indeed possible that the liquid surface may be heated and evaporated halfway, for example, sometimes on the inner wall of the steamer with the lid open, you can see the pot evaporate along the condensed water vapor flowing down the way.

In a closed heat pipe environment, there is another concept called "saturated vapor pressure". One of the physical phenomena is the increase in temperature at the heating end, the increase in vapor pressure, and the increase in boiling point, which is a dynamic process of "negative feedback". The so-called thermal equilibrium state of heat pipes is just to reach the dynamic equilibrium point.

When the heat pipe is just started, the working fluid may evaporate close to the heating end, which is due to the fact that the steam pressure in the pipe is insufficient and the boiling point of the working fluid is still very low when the thermal equilibrium is not reached. During this period, the working efficiency of the heat pipe is very low, but this will cause a sharp increase in the heat of the boiling section, the working fluid boils violently, the steam pressure increases sharply, and the boiling point increases sharply. The increase in the boiling point will reduce the evaporation of the working fluid in the capillary until it returns to the evaporation pond to form a complete dynamic equilibrium.

A well-designed heat pipe has a short time to start equilibrium, and the evaporation of the working fluid is very small due to the pressure of the steam and the pulling force of the capillaries.

Electric heating pipe principle: The resistance wire inside the electric heating pipe is used to heat.

An electric heating pipe is a kind of energy that consumes electricity and converts it into heat energy to heat the material to be heated. In the work, the low-temperature fluid medium enters its input port under pressure through the pipeline, and along the specific heat exchange flow channel inside the electric heating vessel, the path designed by the principle of fluid thermodynamics is used to take away the high-temperature attitude and open heat energy generated in the work of the electric heating element, so that the temperature of the heated medium rises, and the high-temperature medium required by the process is obtained at the outlet of the electric heating pipe.

The heating element is a metal tube with a resistance wire inside, which is the same as the electric furnace wire. The principle of heat generation, the passage of an electric current through a resistor to generate heat. It has excellent performance such as long service life, high electro-heat conversion efficiency, far-infrared radiation, health and environmental protection.

According to the law of electric heating: the amount of heat generated is proportional to the square of the current and the product of the resistance. Principle of Thermal Effect of Electric Current:

The electrons are accelerated in the electric field, gain kinetic energy, have velocity, and then collide with other particles (atoms, molecules, clusters) to cause other particles to gain kinetic energy, resulting in an increase in average kinetic energy and an increase in temperature. Joule-Lenz law: When an electric current passes through a resistor, the resistance heats up and converts electrical energy into heat, a phenomenon called the thermal effect of electric current.

Through a large number of tests, Joules and Lenzes found that the heat generated by the resistance through the current is proportional to the square of the current, the resistance and the energizing time. This is the Joule-Lenz law. This article is from Zhongshan City, Tanzhou Town, Chuangxinxiang Hardware Electric Heating Equipment Manufacturing Factory.

The working principle of an electric heating pipe is actually quite simple.

The alloy heating wire inside heats up the water by filling the tube and compressing the very compact magnesium oxide to the body of the heating pipe. It has nothing to do with what ions are in the water you are talking about. Water is just plain water, and there are no special requirements.

Hope it helps.

In fact, it is generated by the heat generated by the resistor. w=i2*r*t, that's the formula.

It is heated by using a resistance wire inside the electric heating pipe.

The instructions say that it conducts electricity by ions in water, so won't it leakage? Is it safe? Does it mean that it conducts heat by ions in water?

The best way to turn "slow heating" into "fast heating" is to increase the electrical power of the electric heating pipes, which is commonly referred to as wattage.

The outside is a metal tube, the inside is a resistance wire for heating, and the amethy stone conducts heat and insulation!

It's not the same, there is an electric heating wire in the electric heating pipe, which dissipates heat by heating the medium at high temperature, magnesium oxide.

The landlord is talking about electromagnetic heating pipes, right? It seems that this heating speed is like this, and the ordinary resistance wire electric heating pipe is easy to say, change to a high-power one.

Inside the electric heating pipe is an electric heating wire.

Heat pipe technology is a kind of heat transfer element called "heat pipe" invented by the Losalamos National Laboratory in the United States in 1963, which makes full use of the principle of heat conduction and the rapid heat transfer properties of the refrigerating medium, and quickly transfers the heat of the heating object to the heat source through the heat pipe, and its thermal conductivity exceeds the thermal conductivity of any known metal.

From a thermodynamic point of view, why do heat pipes have such good thermal conductivity? The heat absorption and exothermia of an object are relative, and whenever there is a temperature difference, there will inevitably be a phenomenon of heat transfer from high temperature to low temperature. There are three ways to transfer heat from it:

radiation, convection, conduction, of which heat conduction is the fastest. Heat pipes use evaporative refrigeration, so that the temperature difference between the two ends of the heat pipe is very large, so that the heat is quickly conducted. Generally, heat pipes are composed of a tube shell, a wick and an end cap.

The inside of the heat pipe is pumped into a negative pressure state and filled with an appropriate liquid, which has a low boiling point and is easy to volatile. The tube wall has a wick of liquid absorption, which is made of a capillary porous material. When the heat pipe is heated, the liquid in the capillary evaporates rapidly, and the vapor flows to the other end under a small pressure difference, and the heat is released, and it is re-condensed into a liquid, and the liquid flows back to the evaporation section along the porous material by the action of capillary force, so that the cycle continues, and the heat is transferred from one end of the heat pipe to the other end.

This cycle is fast, and the heat can be continuously conducted.

Like the heat pipe in the notebook, it is not really a heat pipe, but just a pure copper thermal conductive element.

The basic composition of a heat pipe consists of three parts: the shell, the capillary structure, and the action fluid.

Its working principle: 1) heat is transferred from the heat source through the heat pipe wall and the wick filled with the working liquid to the (liquid) interface; (2) the liquid evaporates at the (liquid-vapor) sub-interface in the evaporation section; (3) The steam in the steam chamber flows from the evaporation section to the condensing section; (4) The steam condenses on the vapor-liquid interface in the condensation section: (5) The heat is transmitted to the cold source from the (vapor-liquid) interface through the suction core, liquid and pipe wall

6) In the wick, the condensed working liquid is refluxed to the evaporation section due to capillary action.

When the cross-linked crystalline polymer material is heated above the crystalline melting point, it no longer flows, but is in a rubber state and becomes an elastomer. In this state, the expansion is cooled below the crystallization temperature under tension or deformation. As a result of crystallization, the frozen cross-linked chain is shaped into the desired expanded shape and becomes a product with a shape memory effect.

When the expanded product with shape memory heat shrinkage is reheated to the crystallization melting point temperature, it is restored to the initial shape of the irradiation cross-linking under the action of the cross-linked chain in the stress state, which is the heat shrinkage or shape memory principle.

Heat transfer begins when one end of a heat pipe is placed at a higher temperature and the other end is placed at a lower temperature. The heat first passes through the metal pipe wall at high temperature and enters the capillary object, and the working liquid in the capillary object begins to evaporate after being heated. The part of the heat pipe at high temperature is called the evaporator.

The evaporated vapor collects in the hollow tube of the evaporated part and flows to the other end of the heat pipe. Since the other end of the heat pipe is in contact with the lower temperature, the vapor will begin to condense when it reaches the colder end, and the heat will pass through the capillary object, the working fluid and the metal pipe wall from the vapor to the lower temperature. Therefore, the lower temperature part of the heat pipe is called the condenser.

In the condensation part, the vapor that was originally evaporated by the evaporation part is condensed into a liquid, and the condensed liquid flows back to the evaporation part from the condensed part due to the action of capillary pumping, so that the fluid circulates endlessly, and the heat is transferred from the high temperature to the low temperature, which is the heat transfer principle of the heat pipe.