What is the manufacturing method of the coil disc?

Electric rice cooker is a kind of cooking utensil that uses electric energy to convert into internal energy. With steaming, boiling, stewing, simmering and other operating functions. It is mainly composed of coil disc, temperature limiter, heat preservation switch, lever switch, current limiting resistor, indicator lamp and socket. The coil plate is the main heating element of the rice cooker. It is an aluminum alloy plate embedded in the electric heating tube. The induction cooker is an electric cooking appliance based on the principle of electromagnetic induction heating, which is mainly composed of a high-frequency induction heating coil, a high-frequency power conversion device, a controller and a ferromagnetic material pot. Both rice cookers and induction cookers use the magnetic field generated by the coil plate and the high-frequency alternating magnetic field generated by the metal pot to generate heat to heat food. At the beginning of the rice cooker, the coil enameled wire is mainly made of copper wire. With the increase in the price of raw materials and the decrease in the price of food materials, in order to popularize more users, the traditional copper enameled wire for rice cookers and induction cookers is gradually replaced by aluminum enameled wire. The traditional copper enameled wire of rice cookers and induction cookers is connected to the wiring board through the following process, that is, the copper wire is first stripped of paint, then cold pressed with the wiring board, and then filled with tin. This process is relatively mature. However, in the processing of aluminum enameled wire, the enameled wire coating needs to be removed first, then immersed in flux, and tinned after cold pressing. The process is long and

2023-01-16

How to check the coil disc?

The coil disc is a component used for heating in the induction cooker to generate the worm current and thermal effect. The quality of the coil disc is determined by inspection. How to check the coil disk? This article will introduce the inspection method and standard of the coil disk for you in detail. 1. Subject Content and Scope of Application These Rules apply to induction cooker coil products. The Detailed Rules specify the technical requirements and inspection items for coil discs. 2. Inspection items and specific requirements are as follows: 1. Appearance: coil winding is uniform, spacing is uniform, gluing is uniform, flatness is ≤ 1.5mm; The coil should be close to the coil and should not be loose, and the enameled wire should not float (the adhesion between the coil and the coil should be ≥ 5N); The frame shall not be damaged or recessed; Ferrite shall not be damaged, and the ferrite shall be tightly glued in the groove and fixed with epoxy resin; the joint between the terminal and the copper wire needs to be sealed with a heat shrinkable tube and cannot be damaged; the surface of the plastic part should be smooth and tidy, without obvious deformation, discoloration, burrs, flash and other defects. The tray shall not be damaged or dented. 2. Size: The size should meet the requirements of technical drawings and actual installation requirements. 3. Identification and packaging: the product shall be packed into the packing box according to the fixed number, and the product name, model, specification, quantity, manufacturer name and production batch number shall be marked on the outside of the packing box.

2023-01-06

Coil disc precautions and influencing factors

The coil plate is a winding wire that combines a certain number of enameled copper flat wires into two rows with wide surfaces contacting each other, and makes the same turning transposition along the narrow surfaces above and below the two rows of enameled flat wires as required, and then uses electrical insulation paper and rope or tape as continuous winding wires. Coil coil winding, spacing and glue are uniform, flatness ≤ 1.5mm, coil should be close to the coil can not be loosened, enameled wire can not float, disk frame can not be damaged or recessed; Ferrite can not be damaged, need to use epoxy resin tightly in the groove and fixed, terminals and copper wire joints need to be sealed with heat shrinkable tube, heat shrinkable tube can not be damaged, plastic parts surface should be smooth and tidy, without obvious deformation, discoloration, burr, flash and other defects, the tray shall not be damaged or dented. In the actual use of the inductor coil, there are many types of non-standard parts, and according to the need for winding, therefore, in the winding process should pay attention to, then the coil disc in use what matters needing attention. In fact, in its actual use, there are many types of non-standard parts, and they are targeted according to needs. First of all, select the winding method according to the circuit requirements. When winding the hollow inductor coil, the winding method should be determined according to the circuit requirements, the inductor size and the diameter of the coil frame.

2022-12-27

Coil disc detection methods and advantages of introduction, quick collection!

The coil plate is an output power output component and also an energy converter. It converts the high frequency number caused by the power circuit of the switching power supply. According to the coil plate, the high frequency current amount is converted into a high frequency alternating electromagnetic field. Under the action of the high frequency alternating electromagnetic field, the heated container causes thousands of annular current amount and makes the heated container hot. The function of the magnetic stripe card is to embed different styles of magnetic stripe cards under it, reducing the length of the gas gap under it, but no control loop is generated, and the gas gap is still large. It does not do much harm to the magnetic absorption index μo of all its magnetic circuits, and does not do much harm to the inductor quantity L. It stores electromagnetic energy. And released, the electric field can be transformed into an important component of magnetic field energy. The size of the electromagnetic cooker power is greatly related to the winding disc. How to detect the coil is good or bad? Here to introduce. 1. The coil plate is generally not short-circuited, and it is a very thick wire composed of multiple strands of enameled. The current here is very large, which is high-frequency alternating current. Once short-circuited, the insurance will be burned off. The short-circuited point can be seen with naked eyes and will be burned into carbon black. The black color is not short-circuited, but caused by long-term high temperature of insulating paint. 2. If the induction cooker has a power coil plate, it is generally normal,

2022-12-19

Introduction to the working principle and precautions of the coil disc

The coil plate is composed of a certain number of enameled copper flat wires. Two rows of wide surfaces are in contact with each other. The upper and lower sides of the two rows of enameled flat wires are transposable in the same direction along the narrow surfaces as required, and then electrical winding is used for continuous winding of insulating paper and rope or tape. What is the working principle of the coil disc? The following is an introduction. The principle of grounding device magnetic induction coil geomagnetic sensor is based on the basic principle of geomagnetic sensor, using the magnetic effect of current. Under normal circumstances, a loop coil is laid under the subgrade of the same lane, and a certain working current is given as a sensor. When the car passes or stops at the coil, the iron parts of the car itself will change the magnetic flux in it, causing it The inductor of the power circuit changes, and the detector judges the condition of passing vehicles by detecting the change of the inductor. There are generally two methods to check the inductance change: one is to use the phase difference latch and the phase difference voltage comparator to check the phase difference change, and the other is to use the coupling circuit composed of the loop coil to test the oscillation frequency. What are the precautions of the coil disc? The following is the introduction. 1. Pay attention to the work of the coil. It has many good performance, but in the use of the process should pay attention to the working conditions, good working conditions in the air humidity is not more than 95%, no explosive and rot

2022-12-07

Inductance method of electromagnetic coil

1. General Description It is well known that the magnetic effect heating of current is mainly composed of electromagnetic induction heater and electromagnetic induction heating coil, and the matching level of the two is the key to measure the efficacy of magnetic induction heating. For the main parameters of electromagnetic coil, different inductance will be consistent with this according to different output power. There are many ways to 2. the coil inductance of the electromagnetic coil in the common coil inductance mode. According to the structure of the heating body on the spot, it can be generally divided into a flat disc coil and an annular straight-wound coil. Annular straight wound coil, this kind of winding method is based on the outer diameter and size of the barrel to spread the winding line. There are two ways to wind the thread. One is to wind the thread one after the other, which is usually called dense winding. This kind of winding method has the winding method when the length of the barrel is limited. The main disadvantage of this kind of winding method is that the heating door of this kind of winding method will be centralized (the heating door will be concentrated in the core direction of the winding coil). Therefore, under the condition that the barrel has sufficient length, in order to make the heating door symmetrical and loose on the barrel, another winding method is generally adopted: the coil will be wound four or five or six times after one circle, with a spacing of 67cm, then close around down, divided into several. For two close windings and a spacing of 3cm, it can be effectively adjusted according to the length of the barrel, and there is no

2022-11-29

Basic principle of electromagnetic coil maintenance

Principle of self-holding solenoid valve of solenoid coil: when coil 1 of self-maintaining solenoid valve is not energized, the power supply is turned off 3 seconds after coil 2 is plugged in, and the self-holding solenoid valve is turned off; When coil 2 of self-maintaining solenoid valve is not energized, coil 1 is plugged in, the power supply is turned off 3 seconds after coil 1 is plugged in, and the self-holding solenoid valve is opened. Working principle diagram with manual calibration solenoid valve: after the solenoid valve needs to be opened, unscrew the protective cover (the middle of the protective cover is a threaded hole type, which is screwed on the linkage rod to be used as a deceived handle), pull the rocker with force, and the valve opens. When the solenoid valve needs to be turned off, the coil should not be plugged in for more than 1 second, and the valve should be turned off quickly within 65ms. Note Name: The solenoid coil of the emergency shut-off valve is plugged in in an instant, the emergency shut-off valve is turned on and turned off quickly, and the valve is locked. Even if the switching power supply is removed, the gate valve is still locked and turned off. It is not easy to turn on the valve fully automatically again, and manual calibration is required on the spot. Because the self-maintaining solenoid valve without long-term plug-in, completed the environmental protection and energy saving, environmental protection. The basic principle of maintenance of straight solenoid valve: when plugging in, the solenoid coil causes the magnetic field force to lift the shut-off piece from the valve block, and the gate valve opens; when the power is turned off, the magnetic field force subsides and the torsion spring

2022-11-17

What are the characteristics of the electromagnetic coil?

The change method of opening pressure of natural gas solenoid valve: ① Before leaving the factory, the opening pressure of natural gas solenoid valve should be adjusted to the setting value of customer standard one by one. If the customer clearly proposes the pressure level of the torsion spring during operation, it shall be adjusted at the factory according to the limit value under the pressure level. ② the use of natural gas solenoid valve installed in the care equipment before or before assembly, the need to be adjusted again in the assembly on the spot, to ensure that the natural gas solenoid valve set value pressure value in line with the provisions. ③ Within the working pressure level range of the torsion spring indicated on the factory nameplate, the opening pressure can be controlled by rotating the adjusting screw rod to change the compression amount of the spring. ④ Before rotating the adjusting screw rod, the pressure at the valve inlet should be reduced to below 90% of the opening pressure to avoid the piston valve being pushed to rotate when rotating the adjusting screw rod, thus damaging the protruding surface. ⑤ In order to ensure the opening pressure value, the adjusted material standard, such as material type, ambient temperature, etc., should be as close as possible to the actual operating standard. Changes in the type of substance, especially when the state of aggregation of the substance is different (e. g. from liquid to liquid), the opening pressure often changes. When the temperature rises during work, the opening pressure generally decreases. Therefore, when the normal temperature state is adjusted and used for continuous high temperature, the setting value pressure value of the normal temperature state should be slightly higher.

2022-10-28

Application of Inductance Coil Based on Magnetic Field

The application of an inductance coil based on a magnetic field. Is there an inductance? Before answering this question, let us first understand what an inductor is. Just as every object has its own unique characteristics, the inductance coil also has its own unique characteristics, and its characteristics are inductance. How to describe, please see the explanation below. An energized wire can generate a magnetic field. According to the right spiral rule, the direction of the magnetic field and the magnitude of the magnetic field are represented by the magnetic field strength "H. The greater the current, the stronger the magnetic field. The magnetic field is completely generated by electricity. When the current is zero, the magnetic field disappears. Obviously, the greater the current, the greater the number of turns of the coil, and the greater the magnetic field superimposed inside the coil. The size of the magnetic field is expressed by the number of magnetic lines of force, that is, the more magnetic lines of force that pass through a unit area, the stronger the magnetic field. The number of lines of magnetic force passing through the inside of the coil is called a magnetic flux, so that a larger magnetic field indicates a larger magnetic flux. This magnetic field is still generated only by electricity. In other words, the magnetic field around the core coil is composed of two parts, one part is excited by the current on the wire, and the other part is generated by the magnetization of the core. Therefore, after the iron core is placed, the magnetic field of the coil will increase, and the size of the magnetic field is expressed by the magnetic induction intensity "B. Draw a straight line related to the flux and current of the induction coil. This line is the inductive element

2022-10-18

The role of the inductance coil

The effect of the inductance coil inductance is one of the main characteristics of the circuit or electronic device. Inductance is defined as a characteristic of a circuit or device that resists changes in current. Note that the inductor does not block the current, but rather the change in current in the circuit. The unit of inductance is Henry (H), which depends on the physical properties of the circuit rather than electrical properties, because no current or voltage is involved. The inductance is proportional to the "number of turns" and the "area around the coil", and inversely proportional to the "coil length. Inductors have two main functions, namely current resistance and tuning and frequency selection. The self-induced electromotive force in the inductive coil always counteracts the current change in the coil. The inductance coil has an obstruction effect on AC current. The magnitude of the obstruction effect is called inductance reactance XL, and its relationship with inductance L and AC frequency F is XL = 2π FL. Inductance coil is mainly divided into high frequency choke coil and low frequency choke coil. The inductor and the capacitor may be connected in parallel to form an LC tuned circuit. That is, the natural oscillation frequency F0 of the circuit is equal to the frequency F of the non-AC signal, and the inductive reactance and capacitive reactance of the circuit are equal, so the electromagnetic energy oscillates back and forth in the inductance and capacitance, which is called resonance phenomenon. Resonant circuit inductance reactance and capacitive reactance are equivalent and opposite, the total current inductance reactance of the circuit is small.

2022-10-11