A sparkless explosion-proof temperature control method and system

Abstract

The application discloses a spark-free explosion-proof temperature control method and system, and relates to the technical field of equipment control. The method comprises the following steps: a local epoxy resin insulation layer is arranged in a contact area of a contact switch; an epoxy resin material is filled around a metal conductive part of the contact switch through an injection molding process to form a closed insulation structure; an electromagnetic induction driving device is installed outside the contact switch; and the size of electromagnetic force required for closing or opening the contact switch is calculated based on input signal parameters of the electromagnetic induction driving device, and corresponding control instructions are generated. The metal conductive part of the contact switch is insulated by the local epoxy resin, and the spark-free operation is realized in combination with the electromagnetic induction driving device, so that the problems of insufficient local spark protection, decreased heat dissipation performance and complex process in the prior art are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of device control, in particular to a spark-free explosion-proof temperature control method and system. BACKGROUND

[0002] In the field of explosion-proof electrical appliances and temperature control devices, how to effectively avoid the safety hazards caused by sparks generated during the closing and opening of contact switches is an important research direction. Common explosion-proof measures include using overall sealing structures or isolation devices to prevent flammable and explosive gases from contacting electrical components, thereby reducing the risk of fire or explosion. However, existing explosion-proof technologies still have certain deficiencies in local optimization and process simplification, especially in the aspect of spark-free control of contact switches.

[0003] Chinese invention patent with publication number CN111599640B discloses a waterproof and explosion-proof double-metal temperature controller shell and overall packaging intelligent process. The patent embeds a sealing gasket at the joint of the shell and sets a sealing ring in the middle of the heat conduction rod, achieving effective isolation between the inside of the temperature controller and the outside. At the same time, the outer surface is coated with a metal explosion-proof shell to prevent the influence of combustion on surrounding electrical components. However, this technical solution mainly focuses on overall packaging and external protection, and does not involve local isolation measures in the design of contact switches. Moreover, overall packaging may lead to decreased heat dissipation performance, affecting the working efficiency and response speed of the temperature controller. In addition, the overall packaging process is complex, increasing production costs and maintenance difficulty.

[0004] Chinese invention patent with publication number CN105161353B discloses a waterproof and explosion-proof double-metal temperature controller packaging shell and its packaging process. The patent uses an integrated shell instead of traditional inner and outer shell designs, and installs a sealing ring at the contact between the shell and the connecting piece to achieve isolation of internal and external air and water vapor, thereby prolonging the service life of the temperature controller. However, this technical solution does not address the local optimization of spark problems in contact switches. Although the integrated design simplifies the production process, it has limited protection capability for high temperature or sparks in contact switches, which may not meet the application scenarios with high safety requirements. In addition, the aging problem of the sealing ring may affect the reliability of long-term use.

[0005] The above problems show that existing explosion-proof temperature controllers and related packaging technologies still have certain deficiencies in local spark protection, heat dissipation performance optimization, and process simplification. Therefore, the present application provides a spark-free explosion-proof temperature control method and system, aiming to isolate contact switches through local epoxy resin and achieve spark-free operation of closing and opening through electromagnetic induction, thereby improving the safety, response speed, and reliability of the device, simplifying the production process, and meeting the needs of modern industry for efficient and safe explosion-proof devices. SUMMARY

[0006] In view of the deficiencies of the prior art, the present application provides a spark-free explosion-proof temperature control method and system, which realizes spark-free operation of closing and opening by local epoxy resin insulation contact switch combined with electromagnetic induction, thereby improving the safety, response speed and reliability of the equipment.

[0007] In the first aspect, the present application provides a spark-free explosion-proof temperature control method, which realizes spark-free operation of the contact switch by setting an epoxy resin insulation layer around the metal conductive part of the contact switch and combining with an electromagnetic induction driving device, comprising:

[0008] A local epoxy resin insulation layer is arranged at the contact area of the contact switch, and the epoxy resin material is filled around the metal conductive part of the contact switch by injection molding process to form a closed insulation structure;

[0009] An electromagnetic induction driving device is installed outside the contact switch, which is coupled with the metal conductive part of the contact switch through a coil winding, for receiving external signals and generating electromagnetic force;

[0010] Based on the input signal parameters of the electromagnetic induction driving device, the electromagnetic force required for closing or opening the contact switch is calculated, and the corresponding control instruction is generated;

[0011] The output power of the electromagnetic induction driving device is adjusted according to the control instruction, so that the contact switch realizes closing or opening operation without mechanical collision;

[0012] The working state of the contact switch is monitored in real time, the current change data is collected, and it is judged whether the contact switch is abnormal through data analysis;

[0013] When an abnormality is detected, the alarm mechanism is triggered and the output parameters of the electromagnetic induction driving device are adjusted to restore the normal working state of the contact switch.

[0014] In the above technical solution, the local epoxy resin insulation layer arranged at the contact area of the contact switch comprises the following steps:

[0015] The specific position and geometric shape of the metal conductive part of the contact switch are determined;

[0016] An epoxy resin injection mold is designed according to the geometric shape of the metal conductive part, and the inner cavity of the mold matches the outer contour of the metal conductive part;

[0017] The contact switch is fixed on the workbench of the injection molding equipment to ensure that the metal conductive part is aligned with the inner cavity of the mold;

[0018] Liquid epoxy resin is injected into the inner cavity of the mold by the injection molding equipment to uniformly wrap the metal conductive part;

[0019] After the epoxy resin is cured, the mold is removed and the surface of the insulation layer is polished to ensure that the insulation layer is tightly attached to the overall structure of the contact switch.

[0020] In the above technical solution, the electromagnetic induction driving device is installed outside the contact switch, including the steps of:

[0021] A coil former made of high permeability material is selected, and multiple layers of copper enameled wire are wound on the surface of the coil former to form a coil winding;

[0022] Weld wires at both ends of the coil winding, and the wires are connected to an external power supply;

[0023] The coil winding is fixed near the metal conductive part of the contact switch, and the distance between them is kept between 0.5mm and 2mm;

[0024] Wrap an insulating protective layer outside the coil winding;

[0025] The electromagnetic induction driving device is fixed to the shell of the contact switch by bolts or buckles.

[0026] In the above technical solution, the input signal parameters of the electromagnetic induction driving device are used to calculate the electromagnetic force required for the contact switch to close or open, including the steps of:

[0027] Obtain the mass and initial position of the metal conductive part of the contact switch;

[0028] Based on the input signal parameters of the electromagnetic induction driving device, the mass and initial position of the metal conductive part are combined to calculate the theoretical value of the electromagnetic force; the input signal parameters include the number of turns of the coil of the electromagnetic induction driving device and the input current;

[0029] Compare the theoretical value with the theoretical threshold value of the contact switch closing;

[0030] If the theoretical value is less than the theoretical threshold value, adjust the number of turns or the input current until the theoretical value reaches the theoretical threshold value.

[0031] In the above technical solution, the output power of the electromagnetic induction driving device is adjusted according to the control instruction, including the steps of:

[0032] Convert the control instruction into a PWM signal, and transmit the PWM signal to the electromagnetic induction driving device through a driving circuit; wherein, the input current of the electromagnetic induction driving device is adjusted according to the duty cycle of the PWM signal;

[0033] Real-time monitor the actual value of the electromagnetic force, and compare it with the theoretical value;

[0034] If the actual value deviates from the theoretical value, compensate by adjusting the duty cycle of the PWM signal until the actual value and the theoretical value are consistent.

[0035] In the technical solution, the working state of the contact switch is monitored in real time, including the following steps:

[0036] A current sensor is connected in series with the metal conductive part of the contact switch to collect current data flowing through the contact switch.

[0037] The data collected by the current sensor is transmitted to a data processing unit, which filters and denoises the current data.

[0038] According to the processed current data, a current change curve is drawn, and characteristic parameters in the curve are extracted.

[0039] The characteristic parameters are compared with a preset standard parameter range to determine whether the working state of the contact switch is normal.

[0040] If the characteristic parameters exceed the standard parameter range, it is determined that the contact switch has an abnormality.

[0041] In the technical solution, when an abnormality is detected, an alarm mechanism is triggered and the output parameters of the electromagnetic induction driving device are adjusted to restore the normal working state of the contact switch, including the following steps:

[0042] Threshold value judgment logic is set in the data processing unit, and an alarm signal is triggered when the characteristic parameters exceed the threshold value.

[0043] The alarm signal is transmitted to an alarm device through a communication interface, and the alarm device issues an audible and visual alarm prompt.

[0044] At the same time, the alarm signal is transmitted to the control module of the electromagnetic induction driving device.

[0045] The control module adjusts the duty cycle of the PWM signal according to the alarm signal to change the output power of the electromagnetic induction driving device.

[0046] Through multiple iterations of adjustment, the contact switch returns to a normal working state.

[0047] In a second aspect, the present application provides a spark-free explosion-proof temperature control system, which applies the spark-free explosion-proof temperature control method described above. The system includes an isolation layer construction module, a driving device installation module, an electromagnetic force calculation module, a power adjustment module, a state monitoring module, and an abnormality processing module.

[0048] The isolation layer construction module is used to set a local epoxy resin isolation layer in the contact area of the contact switch. The epoxy resin material is filled around the metal conductive part of the contact switch through an injection molding process to form a closed isolation structure.

[0049] The driving device installation module is used for installing the electromagnetic induction driving device outside the contact switch, and coupling the coil winding with the metal conductive part of the contact switch to receive external signals and generate electromagnetic force.

[0050] The electromagnetic force calculation module is used for calculating the electromagnetic force required for the contact switch to close or open based on the input signal parameters of the electromagnetic induction driving device, and generating corresponding control instructions.

[0051] The power adjustment module is used for adjusting the output power of the electromagnetic induction driving device according to the control instructions, so that the contact switch can realize closing or opening operation without mechanical collision.

[0052] The state monitoring module includes a data processing unit, which is used for real-time monitoring of the working state of the contact switch, collecting current change data, and determining whether the contact switch is abnormal through data analysis.

[0053] The abnormality processing module is used for triggering an alarm mechanism when an abnormality is detected, and adjusting the output parameters of the electromagnetic induction driving device to restore the normal working state of the contact switch.

[0054] In the above technical solution, the thickness of the epoxy resin insulation layer in the insulation layer construction module is 0.5mm to 2mm.

[0055] In the above technical solution, the distance between the coil winding of the electromagnetic induction driving device and the metal conductive part of the contact switch is 0.5mm to 2mm.

[0056] Compared with the prior art, the present application has the following advantages and beneficial effects:

[0057] The present application realizes spark-free operation by locally insulating the metal conductive part of the contact switch with epoxy resin, combined with electromagnetic induction driving device, solves the problems of insufficient local spark protection, decreased heat dissipation performance and complex process in the prior art. The epoxy resin insulation layer has excellent insulation performance and high temperature resistance, which can effectively prevent flammable and explosive gas from contacting the metal conductive part of the contact switch, and reduce the risk of fire or explosion. At the same time, the electromagnetic induction driving device controls the operation of the contact switch in a non-contact manner, avoiding the spark problem caused by mechanical collision, improving the safety and reliability of the equipment. In addition, the application of injection molding process simplifies the production process, reduces the manufacturing cost, and facilitates large-scale popularization and use. BRIEF DESCRIPTION OF DRAWINGS

[0058] Figure 1 It is a flowchart of a spark-free explosion-proof temperature control method.

[0059] Figure 2 It is a schematic diagram of a local epoxy resin insulation layer.

[0060] Figure 3 Structure diagram of electromagnetic induction driving device.

[0061] Figure 4 Flow chart of contact switch working state monitoring.

[0062] Figure 5 Structure diagram of a spark-free explosion-proof temperature control system. DETAILED DESCRIPTION

[0063] The technical solutions of the present application will be described below in conjunction with the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application. It should be noted that the relationship terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or sequence between the entities or operations.

[0064] Embodiment 1

[0065] Please refer to Figures 1-4 The present application provides a spark-free explosion-proof temperature control method, which realizes spark-free operation of the contact switch by setting an epoxy resin isolation layer around the metal conductive part of the contact switch and combining an electromagnetic induction driving device, comprising:

[0066] A local epoxy resin isolation layer is arranged in the contact area of the contact switch, and an epoxy resin material is filled around the metal conductive part of the contact switch through an injection molding process to form a closed isolation structure;

[0067] An electromagnetic induction driving device is installed outside the contact switch, which is coupled with the metal conductive part of the contact switch through a coil winding, and is used to receive external signals and generate electromagnetic force;

[0068] Based on the input signal parameters of the electromagnetic induction driving device, the required electromagnetic force size for closing or opening the contact switch is calculated, and the corresponding control instruction is generated;

[0069] The output power of the electromagnetic induction driving device is adjusted according to the control instruction, so that the contact switch realizes closing or opening operation without mechanical collision;

[0070] The working state of the contact switch is monitored in real time, the current change data is collected, and it is judged whether the contact switch is abnormal through data analysis;

[0071] When the abnormality is detected, an alarm mechanism is triggered and the output parameters of the electromagnetic induction driving device are adjusted to restore the normal working state of the contact switch.

[0072] It can be understood that the contact switch includes a metal conductive part, which is the core component of the contact switch and is used to realize the on-off function of the current. In the contact area of the contact switch, the liquid epoxy resin material is filled around the metal conductive part through the injection molding process to form a closed isolation structure, i.e., an epoxy resin isolation layer. The design of the epoxy resin isolation layer needs to ensure that it completely matches the outer contour of the metal conductive part to achieve the effect of tight wrapping. To achieve this purpose, the specific position and geometry of the metal conductive part need to be determined first, and then a special injection mold is designed according to the geometry; the size and shape of the mold cavity should be consistent with the outer contour of the metal conductive part, while a suitable gap is reserved to facilitate the flow of the epoxy resin material and uniformly cover the surface of the metal conductive part. In actual operation, the contact switch is fixed on the workbench of the injection molding equipment, and after ensuring that the metal conductive part is aligned with the mold cavity, the liquid epoxy resin is injected into the mold cavity through the injection molding equipment. After the epoxy resin is cured, the mold is removed and the surface of the isolation layer is polished to make it tightly fit the overall structure of the contact switch and have a smooth and flat surface. The thickness of the epoxy resin isolation layer is usually controlled between 0.5mm and 2mm to ensure that it has good insulation performance and mechanical strength.

[0073] The electromagnetic induction driving device is installed outside the contact switch, and its core components include a coil winding and a coil skeleton made of high magnetic permeability material. The coil winding is formed by winding multiple layers of copper enameled wire on the coil skeleton, and the two ends are connected to the external power supply through soldered wires. The position of the coil winding needs to be close to the metal conductive part of the contact switch, and the distance between them needs to be kept within the range of 0.5mm to 2mm to ensure that the electromagnetic induction driving device can effectively couple the metal conductive part. To prevent external environment from interfering with the coil winding, an insulating protective layer is wrapped around it. The electromagnetic induction driving device is fixed to the shell of the contact switch through bolts or buckles to ensure that its position is stable and not easy to loosen.

[0074] When the number of turns of the coil of the electromagnetic induction driving device and the input current are input, the theoretical value of the electromagnetic force can be calculated in combination with the mass and initial position of the metal conductive part; if the theoretical value does not meet the theoretical threshold value of the contact switch closing, the number of turns of the coil or the input current may need to be adjusted until the theoretical value reaches the theoretical threshold value, thereby driving the contact switch to complete the closing or opening operation; in addition, the current theoretical value required to generate the electromagnetic force is deduced according to the adjusted theoretical value, and a control instruction is generated according to the current theoretical value.

[0075] The power regulation module is responsible for adjusting the output power of the electromagnetic induction driving device according to the control instruction. Specifically, the control instruction is converted into a PWM signal and transmitted to the electromagnetic induction driving device through the driving circuit. The driving circuit adjusts the input current size according to the duty cycle of the PWM signal, thereby changing the magnetic field strength generated by the coil winding and the electromagnetic force size. For example, when the duty cycle of the PWM signal increases, the input current increases, the magnetic field strength increases, and the electromagnetic force increases accordingly; conversely, the same is true. To ensure that the actual value of the electromagnetic force is consistent with the theoretical value, a closed-loop control system is used to monitor the actual value of the electromagnetic force in real time and compare it with the theoretical value. If the actual value deviates from the theoretical value, compensation is made by adjusting the duty cycle of the PWM signal until the actual value and the theoretical value are consistent. This closed-loop control mechanism can effectively improve the response speed and stability of the system.

[0076] The state monitoring module realizes real-time monitoring of the working state of the contact switch by connecting a current sensor in series at the metal conductive part. The current sensor collects current data flowing through the contact switch and transmits the data to the data processing unit. The data processing unit draws a current change curve after filtering and denoising the received current data, and extracts characteristic parameters in the curve. These characteristic parameters include current peak value, valley value, average value, etc., which are used to judge whether the working state of the contact switch is normal. For example, if the current peak value exceeds the preset range, it may indicate that the contact switch is abnormal. At this time, the data processing unit will trigger the alarm mechanism and transmit it to the control module of the electromagnetic induction driving device.

[0077] When an abnormality is detected, the alarm mechanism is immediately started. Threshold judgment logic is preset in the data processing unit, which triggers an alarm signal when the characteristic parameter exceeds the threshold value. The alarm signal is transmitted to the alarm device through the communication interface, and the alarm device issues an audible and visual alarm prompt to remind the operator; at the same time, the alarm signal is transmitted to the control module of the electromagnetic induction driving device, and the control module adjusts the duty cycle of the PWM signal according to the alarm signal to change the output power of the electromagnetic induction driving device. Through multiple iterative adjustments, the contact switch returns to a normal working state. For example, if the current peak value is too high, the control module will reduce the duty cycle of the PWM signal to reduce the output power of the electromagnetic induction driving device, thereby reducing the load pressure of the contact switch until it returns to normal.

[0078] The system of the present application is composed of multiple modules, which cooperate with each other to realize the spark-free control function. The insulation layer construction module is responsible for setting an epoxy resin insulation layer in the contact area of the contact switch, the drive device installation module is responsible for installing the electromagnetic induction drive device, the electromagnetic force calculation module is responsible for calculating the required electromagnetic force for closing or opening the contact switch, the power adjustment module is responsible for adjusting the output power of the electromagnetic induction drive device, and the state monitoring module is responsible for real-time monitoring of the working state of the contact switch. The abnormality processing module is responsible for processing abnormal conditions and restoring the normal working state of the contact switch. Each module realizes information interaction through a data communication interface to ensure the coordinated operation of the entire system.

[0079] In specific application scenarios, the present application can be widely used in refrigerators to effectively suppress the explosion or fire of the compressor in the refrigerator. Due to the excellent insulation performance and high-temperature resistance of the epoxy resin insulation layer, it can effectively prevent flammable and explosive gases from contacting the metal conductive part, thereby reducing the risk of fire or explosion. At the same time, the electromagnetic induction drive device controls the operation of the contact switch in a non-contact manner, avoiding the spark problem caused by mechanical collision, further improving the safety and reliability of the equipment. In addition, the application of injection molding process simplifies the production process, reduces the manufacturing cost, and facilitates large-scale use.

[0080] In order to better enable relevant persons in the art to fully understand and implement the present application, the specific implementation principles of the present application are supplemented in the following with reference to a specific application scenario.

[0081] In a certain refrigerator, the spark-free control method and system provided by the present application are used. In this device, the contact switch is installed inside the temperature controller to control the on-off operation of the heating element; since the refrigerant in the compressor is flammable and explosive, the traditional mechanical contact switch is prone to safety hazards due to poor contact or sparks, so the technical solution of the present application is needed to solve this problem.

[0082] First, an epoxy resin insulation layer is set around the metal conductive part of the contact switch, which is the core component of current on-off, and its surface is covered with a layer of epoxy resin material with a thickness of 0.5mm to 2mm through injection molding process. The design of the injection mold needs to accurately match the geometry of the metal conductive part to ensure that the epoxy resin insulation layer closely fits the metal conductive part. After injection molding, the surface of the insulation layer is polished to form a smooth and flat structure. The insulation performance and high-temperature resistance of the epoxy resin insulation layer can effectively prevent flammable and explosive gases from entering the metal conductive part area of the contact switch, thereby reducing the risk of fire or explosion. In addition, since the thermal conductivity of the epoxy resin material is low, the local setting of the insulation layer will not significantly affect the overall heat dissipation performance, ensuring that the working efficiency of the temperature controller is not disturbed.

[0083] Secondly, the installation and debugging of the electromagnetic induction driving device is the key step to realize sparkless operation. The electromagnetic induction driving device is fixed on the shell of the contact switch through bolts, and the distance between its coil winding and the metal conductive part is kept within the range of 0.5mm to 2mm. When an external signal is input, the coil winding generates a magnetic field acting on the metal conductive part, thereby driving the contact switch to complete the closing or opening operation. In order to avoid interference to the coil winding from the external environment, an insulating protective layer is wrapped outside the coil winding. By adjusting the number of turns of the coil winding and the input current value, the required electromagnetic force size can be accurately calculated. This non-contact electromagnetic induction driving method can completely avoid the spark problem caused by mechanical collision, further improving the safety of the equipment.

[0084] The power regulation module functions to dynamically adjust the output power of the electromagnetic induction driving device according to actual needs. The control command is converted into a PWM signal and transmitted to the electromagnetic induction driving device through a driving circuit. The driving circuit adjusts the input current size according to the duty cycle of the PWM signal, thereby changing the magnetic field strength and electromagnetic force size generated by the coil winding. For example, when the duty cycle of the PWM signal increases, the input current increases, the magnetic field strength increases, and the electromagnetic force increases accordingly; conversely, the same is true. The closed-loop control system monitors the actual value of the electromagnetic force in real time and compares it with the theoretical value. If the actual value deviates from the theoretical value, compensation is made by adjusting the duty cycle of the PWM signal until the actual value and the theoretical value are consistent. This closed-loop control mechanism can effectively improve the response speed and stability of the system, ensuring that the operation accuracy of the contact switch meets the industrial requirements.

[0085] The state monitoring module collects current data flowing through the contact switch in real time through a current sensor and transmits the data to a data processing unit for analysis. The data processing unit draws a current change curve after filtering and denoising the received current data, and extracts characteristic parameters in the curve, including peak value, valley value and average value, etc. These characteristic parameters are used to judge whether the working state of the contact switch is normal. For example, if the current peak value exceeds the preset range, it may indicate that the contact switch is abnormal. At this time, the data processing unit triggers the alarm mechanism and transmits it to the control module of the electromagnetic induction driving device. The alarm device issues an audible and visual alarm prompt to remind the operator to handle the abnormal situation in time; at the same time, the control module adjusts the duty cycle of the PWM signal according to the alarm signal to change the output power of the electromagnetic induction driving device until the contact switch returns to the normal working state.

[0086] In the above device, the technical scheme of the present application realizes sparkless operation of the contact switch through the synergistic effect of the local epoxy resin insulation layer and the electromagnetic induction driving device, the epoxy resin insulation layer effectively prevents the flammable and explosive refrigerant from contacting the metal conductive part, and reduces the risk of fire or explosion; the electromagnetic induction driving device controls the operation of the contact switch in a non-contact manner, avoiding the spark problem caused by mechanical collision, and further improving the safety and reliability of the device. In addition, the application of injection molding process simplifies the production process, reduces the manufacturing cost, and facilitates large-scale popularization and use.

[0087] Embodiment 2

[0088] Please refer to Figures 2-5 The present application provides a sparkless explosion-proof temperature control system, which applies the sparkless explosion-proof temperature control method as described above, and the system comprises an insulation layer construction module, a driving device installation module, an electromagnetic force calculation module, a power adjustment module, a state monitoring module and an abnormality processing module.

[0089] The insulation layer construction module is used to set a local epoxy resin insulation layer in the contact area of the contact switch, and fill the epoxy resin material around the metal conductive part of the contact switch by injection molding process to form a closed insulation structure.

[0090] The driving device installation module is used to install an electromagnetic induction driving device outside the contact switch, and couple the coil winding with the metal conductive part of the contact switch to receive external signals and generate electromagnetic force.

[0091] The electromagnetic force calculation module is used to calculate the required electromagnetic force size for closing or opening the contact switch based on the input signal parameters of the electromagnetic induction driving device, and generate corresponding control instructions.

[0092] The power adjustment module is used to adjust the output power of the electromagnetic induction driving device according to the control instructions, so that the contact switch realizes closing or opening operation without mechanical collision.

[0093] The state monitoring module comprises a data processing unit, which is used to monitor the working state of the contact switch in real time, collect its current change data, and judge whether the contact switch has abnormality through data analysis.

[0094] The abnormality processing module is used to trigger an alarm mechanism when an abnormality is detected, and adjust the output parameters of the electromagnetic induction driving device to restore the normal working state of the contact switch.

[0095] Specifically, in the insulation layer construction module, the thickness of the epoxy resin insulation layer is 0.5mm to 2mm.

[0096] Specifically, the distance between the coil winding of the electromagnetic induction driving device and the metal conductive part of the contact switch is 0.5mm to 2mm.

[0097] The contents not described in the specification are all the prior art known by the skilled in the art, and the model parameters of the electric appliances are not specifically limited, and the conventional equipment can be used. In the technical solution, the electric appliance control elements not mentioned belong to the prior art, so they are not shown in the figure, and will not be described here.

[0098] The above only describes the preferred embodiments of the present application and is not used to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A spark-free explosion-proof temperature control method, characterized in that, Spark-free operation of the contact switch is achieved by setting an epoxy resin insulating layer around the metal conductive parts of the contact switch and combining it with an electromagnetic induction drive device, including: A local epoxy resin insulating layer is set in the contact area of ​​the contact switch. The epoxy resin material is filled around the metal conductive part of the contact switch through injection molding process to form a closed insulating structure. An electromagnetic induction drive device is installed outside the contact switch. The electromagnetic induction drive device is coupled to the metal conductive part of the contact switch through a coil winding to receive external signals and generate electromagnetic force. Based on the input signal parameters of the electromagnetic induction drive device, the magnitude of the electromagnetic force required for the contact switch to close or open is calculated, and the corresponding control command is generated. The output power of the electromagnetic induction drive device is adjusted according to the control command, so that the contact switch can close or open without mechanical collision. Real-time monitoring of the working status of the contact switch, collection of its current change data, and data analysis to determine whether there is any abnormality in the contact switch; When an anomaly is detected, an alarm mechanism is triggered to adjust the output parameters of the electromagnetic induction drive device and restore the contact switch to its normal operating state.

2. The spark-free explosion-proof temperature control method according to claim 1, characterized in that: The step of setting a local epoxy resin insulating layer in the contact area of ​​the contact switch includes: Determine the exact location and geometry of the metal conductive parts of the contact switch; The epoxy resin injection mold is designed according to the geometry of the metal conductive part, and the inner cavity of the mold matches the outer contour of the metal conductive part. Fix the contact switch to the worktable of the injection molding equipment, ensuring that the conductive metal part is aligned with the inner cavity of the mold. Liquid epoxy resin is injected into the mold cavity using injection molding equipment, so that it evenly coats the conductive metal parts. After the epoxy resin has cured, remove the mold and polish the surface of the insulating layer to ensure that the insulating layer fits tightly with the overall structure of the contact switch.

3. The spark-free explosion-proof temperature control method according to claim 1, characterized in that: The step of installing an electromagnetic induction drive device on the outside of the contact switch includes: Select a coil bobbin made of a high permeability material and wind multiple layers of copper enameled wire around its surface to form a coil winding; Wires are welded to both ends of the coil winding, and the wires are connected to an external power source. Fix the coil winding near the metal conductive part of the contact switch, ensuring that the distance between them is between 0.5mm and 2mm; An insulating protective layer is wrapped around the outside of the coil winding; The electromagnetic induction drive device is fixed to the housing of the contact switch by bolts or clips.

4. The spark-free explosion-proof temperature control method according to claim 3, characterized in that: The calculation of the electromagnetic force required for the contact switch to close or open based on the input signal parameters of the electromagnetic induction drive device includes the following steps: Obtain the mass and initial position of the metal conductive part of the contact switch; Based on the input signal parameters of the electromagnetic induction drive device, combined with the mass and initial position of the metal conductive part, the theoretical value of the electromagnetic force is calculated; the input signal parameters include the number of coil turns and the input current of the electromagnetic induction drive device. Compare the theoretical value with the theoretical threshold for the contact switch to close; If the theoretical value is less than the theoretical threshold, adjust the number of coil turns or the input current until the theoretical value reaches the theoretical threshold.

5. The spark-free explosion-proof temperature control method according to claim 4, characterized in that: The step of adjusting the output power of the electromagnetic induction drive device according to the control command includes the following steps: The control command is converted into a PWM signal, and the PWM signal is transmitted to the electromagnetic induction drive device through the drive circuit; wherein, the input current of the electromagnetic induction drive device is adjusted according to the duty cycle of the PWM signal. Real-time monitoring of the actual value of electromagnetic force and comparison with the theoretical value; If the actual value deviates from the theoretical value, compensation is made by adjusting the duty cycle of the PWM signal until the actual value matches the theoretical value.

6. The spark-free explosion-proof temperature control method according to claim 5, characterized in that: The real-time monitoring of the working status of the contact switch includes the following steps; A current sensor is connected in series with the conductive metal part of the contact switch to collect the current data flowing through the contact switch. The data collected by the current sensor is transmitted to the data processing unit, which then performs filtering and noise reduction on the current data. Plot the current change curve based on the processed current data, and extract the characteristic parameters from the curve; The characteristic parameters are compared with the preset standard parameter range to determine whether the working state of the contact switch is normal. If the characteristic parameters exceed the standard parameter range, the contact switch is determined to be abnormal.

7. The spark-free explosion-proof temperature control method according to claim 6, characterized in that: When an anomaly is detected, an alarm mechanism is triggered and the output parameters of the electromagnetic induction drive device are adjusted to restore the normal working state of the contact switch, including the following steps: A threshold judgment logic is set in the data processing unit to trigger an alarm signal when the feature parameter exceeds the threshold. The alarm signal is transmitted to the alarm device through the communication interface, and the alarm device issues an audible and visual alarm. At the same time, the alarm signal is transmitted to the control module of the electromagnetic induction drive device; The control module adjusts the duty cycle of the PWM signal according to the alarm signal, thereby changing the output power of the electromagnetic induction drive device. Through multiple iterative adjustments, the contact switch was restored to normal working condition.

8. A spark-free explosion-proof temperature control system, using the spark-free explosion-proof temperature control method as described in any one of claims 1-7, characterized in that: The system includes an isolation layer construction module, a drive device installation module, an electromagnetic force calculation module, a power adjustment module, a status monitoring module, and an anomaly handling module. The isolation layer construction module is used to set a local epoxy resin isolation layer in the contact area of ​​the contact switch. The epoxy resin material is filled around the metal conductive part of the contact switch through injection molding process to form a closed isolation structure. The drive device mounting module is used to mount an electromagnetic induction drive device on the outside of the contact switch, and couples with the metal conductive part of the contact switch through a coil winding to receive external signals and generate electromagnetic force. The electromagnetic force calculation module is used to calculate the magnitude of the electromagnetic force required for the contact switch to close or open based on the input signal parameters of the electromagnetic induction drive device, and generate corresponding control commands. The power adjustment module is used to adjust the output power of the electromagnetic induction drive device according to the control command, so that the contact switch can achieve the closing or opening operation without mechanical collision. The status monitoring module includes a data processing unit, which is used to monitor the working status of the contact switch in real time, collect its current change data, and determine whether there is any abnormality in the contact switch through data analysis. The anomaly handling module is used to trigger an alarm mechanism when an anomaly is detected, and to adjust the output parameters of the electromagnetic induction drive device to restore the normal working state of the contact switch.

9. The spark-free explosion-proof temperature control system according to claim 8, characterized in that: In the isolation layer construction module, the thickness of the epoxy resin isolation layer is 0.5 mm to 2 mm.

10. The spark-free explosion-proof temperature control system according to claim 8, characterized in that: The distance between the coil winding of the electromagnetic induction drive device and the metal conductive part of the contact switch is 0.5mm to 2mm.

Images