Coil integrating temperature control protection and transient voltage suppression functions

Abstract

The utility model discloses a coil integrating temperature control protection and transient voltage suppression functions, and relates to the technical field of electromagnetic valve coils. The coil integrating the temperature control protection and transient voltage suppression functions comprises a hollow injection molding shell, an insulation framework, a transient suppression diode and a temperature control switch, a coil installation space is formed in the injection molding shell, the insulation framework is located in the coil installation space, and an enameled wire winding is wound on the outer wall of the insulation framework. Internal temperature control protection and transient voltage suppression of the electromagnetic coil are achieved, and the defects in the prior art are effectively overcome. According to the electromagnetic coil, the temperature control switch and the transient suppression diode are integrated in the conventional electromagnetic coil, so that fault damage caused by high temperature, abnormal electrification and external high-voltage interference in the working process of the coil can be avoided, the operation fault rate of the coil is greatly reduced, the reliability is enhanced, the failure risk is reduced, and the maintenance cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of solenoid valve coils, in particular to a coil with integrated temperature control protection and transient voltage suppression functions. Background Art

[0002] Solenoid valves are common industrial equipment that use the electromagnetic principle. They are basic automation components used to control fluids and are widely used in the automotive and industrial fields. The reason why solenoid valves can rely on electromagnetic force to control the on and off of the valve is that electromagnetic coils are indispensable. Electromagnetic coils are devices that work on the principle of electromagnetic induction. The basic structure is that a wire is wound around an insulating frame in circles. The electromagnetic coil uses a energized wire to generate a magnetic field. When current flows through the wire, according to Faraday's law of electromagnetic induction, the current flowing through any conductor will generate a circular magnetic field around the conductor. The magnetic fields generated by the turns of wire wrapped around the insulating frame all pass through the center of the coil and are added (superimposed) at its center to generate a strong magnetic field.

[0003] The more turns of wire wound around the insulating frame, the stronger the magnetic field generated, or the greater the current flowing through the wire, the stronger the magnetic field generated. The traditional electromagnetic coil is designed based on the above principle. Its working principle diagram and basic structure diagram are shown in Figure 3 and Figure 4 The traditional electromagnetic coil is mainly composed of a skeleton 2, enameled wire 4, an outer frame 3 and an injection molded shell 1. When power is turned on, current flows through the coil formed by the enameled wire 4, generating magnetic force at the center of the coil. When power is turned off, the magnetic force disappears.

[0004] In actual use, especially in the automotive field, the current electromagnetic coil solution has some obvious defects, which will interfere with the reliability and stability of the electromagnetic coil operation. The first defect is that when current passes through the coil, in addition to generating electromagnetic force, it will also quickly generate heat. The working environment of automotive coils is harsh. The working environment temperature in summer can be as high as 60°C or above. In a high temperature environment, continuous power supply to the coil can easily cause the coil to overheat, and the enamel layer inside the coil will age and be damaged, resulting in coil short circuit and open circuit. Once a fault occurs, the electromagnetic coil fails and the vehicle will not be able to work normally; the second defect is that traditional coils have weak resistance to external interference. Automotive coils are often mainly low-voltage coils. During the operation of the vehicle, many high-voltage devices such as motors and pump components will work at the same time. The electromagnetic field formed by the high-voltage devices can easily cause electromagnetic interference to the coil, resulting in abnormally large interference voltage at both ends of the coil. Excessive interference voltage frequently impacts the coil and breaks through the coil enamel layer, which also causes the coil to malfunction. Utility Model Content

[0005] (1) Technical problems solved

[0006] In response to the shortcomings of the existing technology, the utility model provides a coil with integrated temperature control protection and transient voltage suppression functions, which solves the problem that the electromagnetic field formed by high-voltage devices can easily cause electromagnetic interference to the coil, resulting in abnormally large interference voltage at both ends of the coil. The excessive interference voltage frequently impacts the coil and breaks through the coil enamel layer, which also causes the coil to malfunction.

[0007] (2) Technical solution

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions: a coil with integrated temperature control protection and transient voltage suppression functions, comprising:

[0009] A hollow injection-molded housing, wherein the interior of the injection-molded housing forms a coil installation space;

[0010] An insulating frame, the insulating frame being located in the coil installation space, an enameled wire winding being wound on an outer wall of the insulating frame, and an outer bracket being provided outside the enameled wire winding and at an outer edge of the insulating frame;

[0011] A transient suppression diode and a temperature-controlled switch are both located in an injection-molded housing and are electrically connected to the enameled wire winding.

[0012] Preferably, the upper and lower ends of the injection-molded shell are open, and the insulating frame and the outer bracket are provided with through grooves corresponding to the positions of the openings.

[0013] Preferably, a mounting groove is provided inside the injection-molded housing, and the transient suppression diode and the temperature control switch are embedded in the corresponding mounting groove.

[0014] (3) Beneficial effects

[0015] The utility model provides a coil with integrated temperature control protection and transient voltage suppression functions. Compared with the prior art, it has at least the following beneficial effects:

[0016] The internal temperature control protection and transient voltage suppression of the electromagnetic coil are realized, which effectively solves the shortcomings of the existing technology.

[0017] A temperature control switch and transient suppression diode are integrated inside a conventional electromagnetic coil to ensure that the coil will not be damaged by high temperature, abnormal power supply, or external high-voltage interference during operation. This greatly reduces the coil's operating failure rate, enhances reliability, reduces the risk of failure, and saves maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of the utility model;

[0019] Figure 2 This is a circuit working principle diagram of the utility model;

[0020] Figure 3 Schematic diagram of the traditional coil circuit structure;

[0021] Figure 4 This is the working principle diagram of the traditional coil.

[0022] In the figure: 1. Injection-molded housing; 2. Insulation frame; 3. External bracket; 4. Enameled wire winding; 5. Temperature control switch; 6. Transient suppression diode. DETAILED DESCRIPTION

[0023] See also Figure 1-4 The present invention provides a technical solution. The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0024] : A coil with integrated temperature control protection and transient voltage suppression functions, comprising: a hollow injection-molded shell 1, an insulating skeleton 2, a transient suppression diode 6, and a temperature control switch 5;

[0025] A coil installation space is formed inside the injection-molded shell 1, and the insulating frame 2 is located in the coil installation space. An enameled wire winding 4 is wound on the outer wall of the insulating frame 2. An outer bracket 3 is provided outside the enameled wire winding 4 and at the outer edge of the insulating frame 2. The transient suppression diode 6 and the temperature control switch 5 are both located in the injection-molded shell 1, and the transient suppression diode 6 and the temperature control switch 5 are electrically connected to the enameled wire winding 4.

[0026] The upper and lower ends of the injection-molded shell 1 are open, and the insulating frame 2 and the outer bracket 3 are provided with through grooves corresponding to the positions of the openings. The interior of the injection-molded shell 1 is provided with mounting grooves, and the transient suppression diode 6 and the temperature control switch 5 are embedded in the corresponding mounting grooves.

[0027] Specific structural components, such as Figure 1 As shown, the circuit connection relationship between the transient suppression diode 6, the temperature control switch 5, and the enameled wire winding 4 is as follows: Figure 2 shown.

[0028] Insulation frame 2: Made of corrosion-resistant material with certain strength and good insulation, it is used to provide a support base for winding and fixing the enameled wire.

[0029] Injection molding shell 1: After the internal main body of the enameled wire winding 4 is assembled, a mold is made according to the overall shape of the enameled wire winding 4. The entire enameled wire winding 4 is molded using a material with good fluidity and good insulation combined with an injection molding process to form a coil shell that meets the digital model requirements.

[0030] Transient voltage suppressor diode 6: A standard electrical component. Appropriate diode voltage suppression parameters are selected based on the operating voltage range of the enameled wire winding 4. This component is connected in parallel with the enameled wire winding 4 during manufacture. The enameled wire winding 4 will not be affected by the diode during normal operation. However, when the enameled wire winding 4 is subject to external high-voltage interference, the diode will absorb and filter the high-voltage portion that exceeds its suppression voltage, thereby protecting the electromagnetic coil from high-voltage shocks.

[0031] Temperature control switch 5: a standard electrical component. Appropriate temperature control switch parameters are selected according to the maximum temperature resistance of the enameled wire winding 4, and the component is connected in series with the enameled wire winding 4 when the enameled wire winding 4 is manufactured. When the coil is working normally, the temperature is within the limit. At this time, the resistance of the temperature control switch 5 itself is very low, which is equivalent to a good conductor and will not affect the operation of the coil. When the coil works in a high-temperature environment and is powered on for a long time, the coil temperature exceeds the protection limit of the temperature control switch 5, the temperature-sensitive copper sheet inside the temperature control switch 5 will deform and detach from the contact, thereby cutting off the power to the coil to prevent the coil from being damaged by high temperature or burning accidents. After the coil is cut off, no current flows through it and it cools down rapidly. When the temperature drops to the recovery temperature of the temperature control switch 5, the copper sheet inside the temperature control switch 5 is reset, the contact is reconnected, the coil is turned on, and normal operation is restored.

[0032] Enameled wire winding 4: The main body is a thin copper wire, which is wound around the insulating frame 2 in circles to form a winding. One circle is one turn. In order to prevent short circuits between turns of the copper wire winding, a layer of insulating varnish is coated on the surface of the copper wire before winding. Therefore, the copper wire coated with insulating varnish is wound around the insulating frame in circles to form an enameled wire winding 4. Pins are reserved at both ends of the winding. When power is turned on, the current passes through the enameled wire winding 4 wound on the insulating frame 2, and the generated magnetic field all passes through the center of the coil and is added (superimposed) at its center to generate a strong magnetic field.

[0033] Outer bracket 3: Made of corrosion-resistant, high-strength metal material, it is used to shield the strong magnetic field inside the coil, lock the magnetic lines of force in the center of the coil, and prevent the coil from leaking magnetic flux.

[0034] In the coil design with integrated thermal protection and transient voltage suppression, the basic coil functions and the specific implementation of transient suppression and thermal protection are shown below. The functional modules work together to ensure long-term stable operation of the coil.

[0035] The basic function of the coil is realized: after the coil is energized, the current passes through the enameled wire winding 4 wound on the insulating frame 2, and the generated magnetic field all passes through the center of the coil and is added (superimposed) at its center to generate a strong magnetic field. The coil realizes the basic function of converting the electric field into a magnetic field.

[0036] Implementation of the transient voltage suppression protection function: Select an appropriate voltage suppression parameter for the transient voltage suppression diode 6 based on the coil operating voltage range. In this embodiment, assuming the coil operating voltage is 18-32V, a voltage suppression parameter of 36V is more appropriate for the transient voltage suppression diode 6. When the coil is manufactured, this component is connected in parallel with the enameled wire winding 4. The coil will not be affected by the transient voltage suppression diode 6 during normal operation. When the coil is interfered with by an external electromagnetic field, causing a transient high-voltage interference voltage to be induced at both ends of the enameled wire winding 4, the voltage suppression of the transient voltage suppression diode 6 is triggered, absorbing the transient high voltage exceeding the 36V suppression voltage, thereby protecting the coil enameled wire winding 4 from breakdown by the interference voltage.

[0037] Implementation of temperature control protection function: Select appropriate temperature protection parameters of the temperature control switch 5 according to the maximum temperature resistance of the coil. In this embodiment, assuming that the normal operating temperature of the coil is 85°C and the maximum operating temperature resistance is 150°C, the temperature protection parameter of the selected temperature control switch 5 is 135°C and the recovery temperature is 105°C. When the coil is manufactured, this component and the enameled wire winding 4 are connected in series. When the coil is working normally, the temperature does not exceed the limit. At this time, the resistance of the temperature control switch itself is very low, which is equivalent to a good wire and will not affect the operation of the coil. When the coil works in a high-temperature environment and is energized for a long time, when the coil temperature exceeds the protection limit of the temperature control switch 5, the temperature-sensitive copper sheet inside the temperature control switch 5 will be deformed and separated from the contact, thereby cutting off the circuit of the enameled wire winding 4, preventing the enameled wire winding 4 from being damaged by high temperature or igniting the coil injection molded shell 1, thereby causing a combustion accident, etc. After the enameled wire winding 4 is cut off, no current passes through, and the coil cools down rapidly. When the temperature drops to the recovery temperature of the temperature control switch 5, the copper sheet inside the temperature control switch 5 is reset, the contact is reconnected, the enameled wire winding 4 is turned on, and the coil resumes its electromagnetic conversion function.

[0038] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0039] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A coil with integrated temperature control protection and transient voltage suppression function, characterized in that: include: A hollow injection-molded housing (1), wherein the interior of the injection-molded housing (1) forms a coil installation space; An insulating frame (2), the insulating frame (2) being located in the coil installation space, an enameled wire winding (4) being wound on the outer wall of the insulating frame (2), and an outer bracket (3) being provided outside the enameled wire winding (4) and located at the outer edge of the insulating frame (2); A transient suppression diode (6) and a temperature control switch (5) are both located in the injection molded housing (1), and are electrically connected to the enameled wire winding (4).

2. The coil with integrated temperature control protection and transient voltage suppression functions according to claim 1, characterized in that: The upper and lower ends of the injection-molded housing (1) are open, and the insulating frame (2) and the outer bracket (3) are provided with through grooves corresponding to the positions of the openings.

3. The coil with integrated temperature control protection and transient voltage suppression functions according to claim 1, characterized in that: The injection molded housing (1) is provided with mounting grooves inside, and the transient suppression diode (6) and the temperature control switch (5) are embedded in the corresponding mounting grooves.

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