Intelligent overload protection device of household electrical appliance main control board

Abstract

The invention discloses an intelligent overload protection device of a household electrical appliance main control board, and relates to the technical field of household electrical appliance overload protection, the intelligent overload protection device comprises a first shell, and the top of the first shell is provided with a second shell through bolts. When the pin inserting piece is used, the inserting piece body is inserted into the pin body, then the two ends of the two clamping rods are pressed, the fixing rod is driven to move through the fixing block, when the limiting groove moves to the limiting rod, the limiting spring rebounds to drive the moving block to move, one end of the limiting rod is inserted into the limiting groove, and the fixing rod is limited; and therefore, the two moved clamping rods are limited. At the moment, the two first insulation sleeves are in contact with the outer surface of the pin body and generate pressure on the top end of the pin body, so that the top end of the pin body is tightened, the connection pressure between the pin body and the insertion piece body is increased, the pin body and the insertion piece body are in tight contact, and the tightness is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of overload protection for household appliances, and particularly to an intelligent overload protection device for the main control board of household appliances. Background Technique

[0002] The main control board of household appliances is a key component in household appliances, responsible for controlling and managing various functions of the appliances. When the main control board of household appliances controls the operation of the appliances, it needs to provide electrical energy and control signals for each component. When a fault occurs in the external circuit, it will cause a sharp increase in the current flowing through the main control board, resulting in an overload phenomenon. Without overload protection, the excessive current may damage the electronic components on the main control board, such as chips, capacitors, resistors, etc., thus causing the entire household appliance to malfunction, and even potentially leading to safety hazards, such as fires. Intelligent overload protection can monitor the working state of the device in real time, and once an abnormal situation is detected, it can cut off the power supply in time or take measures to avoid damage.

[0003] In the prior art, in the intelligent overload protection device of the main control board of household appliances, the relay is a very important component. The relay can cut off the power supply of the overload circuit and prevent excessive current from damaging the main control board and other components. When the relay is in use, the insertion pieces at the bottom need to be inserted into the normally open pins and normally closed pins of the base. When subjected to vibration or external impact, this simple plug-in connection will cause the insertion pieces to become loose, resulting in poor contact between the insertion pieces and the pins, signal interference, thus affecting the normal operation of the relay and being unfavorable for current overload protection.

[0004] Therefore, we propose an intelligent overload protection device for the main control board of household appliances to solve the problems raised in the above background technique. Summary of the Invention

[0005] The purpose of the present invention is to provide an intelligent overload protection device for the main control board of household appliances to solve the problem that in the intelligent overload protection device of the main control board of household appliances mentioned in the above background technique, the insertion pieces at the bottom of the relay need to be inserted into the pins of the base. When subjected to vibration or external impact, the simple plug-in connection will cause the insertion pieces to become loose, resulting in poor contact between the insertion pieces and the pins, affecting the normal operation of the relay and being unfavorable for current overload protection.

[0006] To achieve the above purpose, the present invention provides the following technical solution: An intelligent overload protection device for the main control board of household appliances, including a first housing, the top of the first housing is installed with a second housing through bolts, the bottom surface inside the first housing is installed with a mounting plate through bolts, a bottom case is arranged on the top of the mounting plate, a relay body is arranged on the top of the bottom case, and a clamping component and an anti-friction component are arranged inside the bottom case;

[0007] The clamping assembly includes eight clamping rods. First insulating sleeves are fixedly connected to the outer surfaces of the eight clamping rods. Two fixing blocks are fixedly installed on the outer surfaces of the eight clamping rods. Fixing rods are fixedly installed on one side outer surfaces of the eight fixing blocks. Return springs are movably sleeved on the outer surfaces of the eight fixing rods. Limiting grooves are opened at positions near one ends of the outer surfaces of the eight fixing rods. Connecting grooves are opened at both ends of four of the clamping rods. Moving holes are opened on both side outer surfaces of the other eight fixing blocks. Threaded shafts are threadedly embedded in the interiors of the eight connecting grooves. Fixing rings are fixedly installed in the interiors of the eight connecting grooves. Limiting rods are movably embedded in the interiors of the eight fixing rings.

[0008] Preferably, limiting springs are movably sleeved on the outer surfaces of the eight limiting rods. Moving blocks are fixedly installed at one ends of the eight limiting rods. Chute grooves are opened at one ends of the eight limiting rods. Double-headed connecting rods are movably embedded in the interiors of the eight threaded shafts. One ends of the eight double-headed connecting rods are respectively movably embedded in the interiors of the eight chute grooves. The outer surfaces of the eight double-headed connecting rods are respectively movably embedded in the interiors of the eight moving blocks.

[0009] Preferably, the anti-friction assembly includes eight protective top rods. Second insulating sleeves are fixedly connected to the outer surfaces of the eight protective top rods. Every two horizontally distributed protective top rods among the eight protective top rods form a group. V-shaped blocks are fixedly installed at both ends of the four groups of protective top rods. Fixing shafts are fixedly installed on one side outer surfaces of the eight V-shaped blocks. Every four vertically distributed fixing shafts among the eight fixing shafts form a group.

[0010] Preferably, connecting plates are fixedly installed on the outer surfaces of the two groups of fixing shafts. Two metal plates are fixedly installed at the bottoms of the two connecting plates. J-shaped plates are fixedly installed on both side outer surfaces of the bottom case. Two magnets are fixedly installed at the tops of the two J-shaped plates. The tops of the four magnets are magnetically connected to the bottoms of the four metal plates respectively. Four moving holes are opened at positions near the bottoms of both side outer surfaces of the bottom case. The outer surfaces of the eight fixing shafts are respectively movably embedded in the interiors of the eight moving holes.

[0011] Preferably, a microcontroller is installed on the bottom surface inside the first housing by screws, a Hall current sensor is installed on the bottom surface inside the first housing by screws, an alarm is installed on the bottom surface inside the first housing by screws. A plurality of insert pieces are arranged at the bottom of the relay body. A plurality of jacks are opened at the top of the bottom case. Four adjusting holes are opened on both side outer surfaces of the bottom case. A plurality of pin bodies are arranged at the top of the mounting plate. The outer surfaces of the plurality of insert pieces are respectively movably embedded in the interiors of the plurality of jacks and the plurality of pin bodies.

[0012] Preferably, every two of the eight adjusting holes distributed horizontally form a group, and every two of the eight clamping rods distributed horizontally form a group. The outer surfaces of the four groups of clamping rods are respectively movably embedded in the interiors of the four groups of adjusting holes. The outer surfaces of the eight first insulating sleeves are all movably embedded in the interior of the bottom case. One ends of the eight reset springs are respectively fixedly installed on the outer surfaces of eight of the fixing blocks.

[0013] Preferably, the other ends of the eight reset springs are respectively fixedly installed on the outer surfaces of the other eight fixing blocks. The outer surfaces of the eight fixing rods are respectively movably embedded in the interiors of eight of the moving holes. One ends of the eight fixing rods respectively movably penetrate into the interiors of the eight connecting grooves.

[0014] Preferably, the other ends of the eight limiting rods respectively contact the outer surfaces of the eight fixing rods. One ends of the eight limiting springs are respectively fixedly connected to the outer surfaces of one sides of the eight fixing rings. The other ends of the eight limiting springs are respectively fixedly connected to the outer surfaces of one sides of the eight moving blocks. The outer surfaces of the eight moving blocks are respectively movably embedded in the interiors of the eight connecting grooves.

[0015] An intelligent overload protection system for the main control board of a household appliance, which comprises: a current detection module, a micro-control module, a drive circuit module, a protection execution module, a storage and recording module, a reset and control module, an alarm module and a communication module;

[0016] The current detection module is used for monitoring the magnitude of the current in the circuit in real time and converting the current signal into an electrical signal. The micro-control module is used for receiving the signal and sending out a control instruction to initiate a protection measure. The drive circuit module is used for providing a drive signal for the protection execution module.

[0017] Preferably, the protection execution module is used for taking actual protection actions. The storage and recording module is used for storing and recording the detected current data. The reset and control module is used for restoring the system to the normal working state after troubleshooting. The alarm module is used for abnormal alarm reminders. The communication module is used for sending the alarm information to the user.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. When the present invention is in use, the insert body is inserted into the inside of the pin body, and then the two ends of the two clamping rods are pressed, driving the fixing rod to move through the fixing block. When the limiting groove moves to the position of the limiting rod, the limiting spring rebounds, driving the moving block to move, so that one end of the limiting rod is inserted into the limiting groove to limit the fixing rod, thereby limiting the two moved clamping rods. At this time, the two first insulating sleeves are in contact with the outer surface of the pin body and generate pressure on the top end of the pin body, tightening its top end, increasing the connection pressure between the pin body and the insert body, making the pin body and the insert body tightly contact, improving the tightness, preventing loosening between the insert body and the pin body due to accidental vibration or impact, ensuring the stability and reliability of the electrical connection, thus ensuring the normal operation of the circuit and improving the effect of overcurrent protection.

[0020] 2. When the present invention is in use, the two threaded shafts are screwed out, driving the double-headed connecting rod and the moving block to move outwards, moving one end of the limiting rod out of the limiting groove, and the compressed reset spring starts to rebound, pushing the two clamping rods to move in the opposite direction, making the fixing rod reset, and the positions of the limiting groove and the limiting rod are staggered. Repeat the above operation to release the tightening of the other three groups of pin bodies. Then, pull up the connecting plate outward, separating the metal plate from the magnet, driving the fixed shaft and the V-shaped block to move upward, so that the protective ejector rod slightly pushes the top end of the pin body outwards, increasing the space range between the pin body and the insert body, preventing large friction between the insert body and the pin body when the insert body is pulled out from the inside of the pin body later, which may damage the pin body and affect the normal operation of the device.

[0021] 3. When the present invention is in use, the current detection module monitors the current magnitude during the operation of the main control board of the household appliance in real time and converts it into an electrical signal. The micro-control module receives the detected electrical signal, compares and analyzes it with a preset overload threshold, and makes a decision based on the comparison result. The drive circuit module amplifies and shapes the weak control signal output by the micro-control module and provides a suitable drive waveform. The protection execution module takes actual protection actions according to the instructions of the micro-control module, such as cutting off the circuit, limiting the power, etc., to prevent the overload current from damaging the electrical equipment. The storage and recording module stores and records relevant parameters, and at the same time records the detailed information of the overload event. When abnormal situations such as overload are detected, the micro-control module also controls the alarm module to issue an alarm, reminding the user to pay attention to the problem of the electrical equipment, and sending the overload information and the alarm information to the user's mobile phone through the communication module, facilitating the user to understand the situation in the first time. The reset and control module is used to restore the system to the normal working state after troubleshooting. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a front perspective view of an intelligent overload protection device for the main control board of a household appliance according to the present invention;

[0023] Figure 2 It is a three-dimensional exploded view of the structure of an intelligent overload protection device for the main control board of a household appliance according to the present invention;

[0024] Figure 3 It is a partial structure cross-sectional view of the first housing in the intelligent overload protection device for the main control board of a household appliance according to the present invention;

[0025] Figure 4 It is a three-dimensional exploded view of the structure of the insert body in the intelligent overload protection device for the main control board of a household appliance according to the present invention;

[0026] Figure 5 It is a three-dimensional exploded view of the structure of the bottom shell in the intelligent overload protection device for the main control board of a household appliance according to the present invention;

[0027] Figure 6 It is a partial structure cross-sectional view of the movable hole in the intelligent overload protection device for the main control board of a household appliance according to the present invention;

[0028] Figure 7 It is a three-dimensional exploded view of the structure of the anti-friction component in the intelligent overload protection device for the main control board of a household appliance according to the present invention;

[0029] Figure 8 It is a three-dimensional exploded view of the structure of the clamping component in the intelligent overload protection device for the main control board of a household appliance according to the present invention;

[0030] Figure 9 It is a partial structure cross-sectional view of the clamping rod in the intelligent overload protection device for the main control board of a household appliance according to the present invention;

[0031] Figure 10 It is a partial structure cross-sectional view of the limiting rod in the intelligent overload protection device for the main control board of a household appliance according to the present invention;

[0032] Figure 11 It is a system diagram of the intelligent overload protection device for the main control board of a household appliance according to the present invention.

[0033] In the figure:

[0034] 1. First housing; 2. Second housing; 3. Mounting plate; 4. Bottom case; 5. Relay body; 6. Clamping assembly; 601. Clamping rod; 602. First insulating sleeve; 603. Fixed block; 604. Fixed rod; 605. Return spring; 606. Limit groove; 607. Connection groove; 608. Moving hole; 609. Threaded shaft; 610. Fixed ring; 611. Limit rod; 612. Limit spring; 613. Moving block; 614. Chute; 615. Double-headed connecting rod; 7. Anti-friction assembly; 701. Protective ejector rod; 702. Second insulating sleeve; 703. V-shaped block; 704. Fixed shaft; 705. Connecting plate; 706. Metal plate; 707. Channel-shaped plate; 708. Magnet; 8. Microcontroller; 9. Hall current sensor; 10. Alarm; 11. Insert body; 12. Jack; 13. Adjusting hole; 14. Moving hole; 15. Pin body; 16. Current detection module; 17. Microcontrol module; 18. Drive circuit module; 19. Protection execution module; 20. Storage and recording module; 21. Reset and control module; 22. Alarm module; 23. Communication module. Detailed implementation mode

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0036] Embodiment 1: Please refer to Figures 1-11As shown in the figure, the present invention provides a technical solution: an intelligent overload protection device for the main control board of a household appliance, which includes a first housing 1. The top of the first housing 1 is bolted with a second housing 2. The bottom surface inside the first housing 1 is bolted with a mounting plate 3. The top of the mounting plate 3 is provided with a bottom case 4. The top of the bottom case 4 is provided with a relay body 5. A clamping assembly 6 and an anti-friction assembly 7 are arranged inside the bottom case 4;The clamping assembly 6 includes eight clamping rods 601. The outer surfaces of the eight clamping rods 601 are fixedly connected with first insulating sleeves 602. Two fixing blocks 603 are fixedly installed on the outer surfaces of the eight clamping rods 601. One side outer surfaces of the eight fixing blocks 603 are fixedly installed with fixing rods 604. Return springs 605 are movably sleeved on the outer surfaces of the eight fixing rods 604. Limiting grooves 606 are opened at one ends of the outer surfaces of the eight fixing rods 604. Connecting grooves 607 are opened at both ends of four of the clamping rods 601. Moving holes 608 are opened on both side outer surfaces of the other eight fixing blocks 603. Threaded shafts 609 are threadedly embedded in the interiors of the eight connecting grooves 607. Fixing rings 610 are fixedly installed in the interiors of the eight connecting grooves 607. Limiting rods 611 are movably embedded in the interiors of the eight fixing rings 610. Limiting springs 612 are movably sleeved on the outer surfaces of the eight limiting rods 611. Moving blocks 613 are fixedly installed at one ends of the eight limiting rods 611. Chute grooves 614 are opened at one ends of the eight limiting rods 611. Double-headed connecting rods 615 are movably embedded in the interiors of the eight threaded shafts 609. One ends of the eight double-headed connecting rods 615 are respectively movably embedded in the interiors of the eight chute grooves 614. The outer surfaces of the eight double-headed connecting rods 615 are respectively movably embedded in the interiors of the eight moving blocks 613. A microcontroller 8 is installed on the bottom surface inside the first housing 1 by screws. A Hall current sensor 9 is installed on the bottom surface inside the first housing 1 by screws. An alarm 10 is installed on the bottom surface inside the first housing 1 by screws. A plurality of insertion pieces 11 are arranged at the bottom of the relay body 5. A plurality of jacks 12 are opened at the top of the bottom case 4. Four adjusting holes 13 are opened on both side outer surfaces of the bottom case 4. A plurality of pin bodies 15 are arranged at the top of the mounting plate 3. The outer surfaces of the plurality of insertion pieces 11 are respectively movably embedded in the interiors of the plurality of jacks 12 and the plurality of pin bodies 15. Every two horizontally distributed adjusting holes 13 among the eight adjusting holes 13 form a group. Every two horizontally distributed clamping rods 601 among the eight clamping rods 601 form a group. The outer surfaces of the four groups of clamping rods 601 are respectively movably embedded in the interiors of the four groups of adjusting holes 13. The outer surfaces of the eight first insulating sleeves 602 are movably embedded in the interior of the bottom case 4. One ends of the eight return springs 605 are respectively fixedly installed on one side outer surfaces of eight of the fixing blocks 603. The other ends of the eight return springs 605 are respectively fixedly installed on the outer surfaces of the other eight fixing blocks 603. The outer surfaces of the eight fixing rods 604 are respectively movably embedded in the interiors of eight of the moving holes 608. One ends of the eight fixing rods 604 respectively movably penetrate through the interiors of the eight connecting grooves 607. The other ends of the eight limiting rods 611 are respectively in contact with the outer surfaces of the eight fixing rods 604. One ends of the eight limiting springs 612 are respectively fixedly connected with one side outer surfaces of the eight fixing rings 610. The other ends of the eight limiting springs 612 are respectively fixedly connected with one side outer surfaces of the eight moving blocks 613. The outer surfaces of the eight moving blocks 613 are respectively movably embedded in the interiors of the eight connecting grooves 607.;

[0037] In this embodiment, during use, the relay body 5, the alarm 10, the Hall current sensor 9 and the microcontroller 8 are electrically connected. Installed horizontally and grouped, the pin body 15 can be divided into four groups, as Figure 5 shown. Two clamping rods 601 are distributed on the outer surface of each group of pin bodies 15, and two protective ejector rods 701 are distributed inside each group of pin bodies 15. The limiting rod 611 contacts the outer surface of the fixed rod 604 and is limited by the fixed rod 604. The limiting rod 611 and the moving block 613 are subjected to a thrust force, causing the limiting spring 612 to be pulled and expand, as Figure 10 shown. Insert the insert body 11 downward into the jack 12 and enter the inside of the pin body 15. Then press both ends of the two clamping rods 601, so that the two clamping rods 601 move relative to each other inside the corresponding adjustment holes 13, and drive the fixed block 603 to move, causing the return spring 605 to be squeezed and contract together, and one end of the fixed rod 604 slides into the connection groove 607. At the same time, the limiting rod 611 moves on the outer surface of the fixed rod 604. When the limiting groove 606 moves to the position of the limiting rod 611, the limiting spring 612 loses its pulling force and starts to rebound, driving the moving block 613 to move, so that one end of the limiting rod 611 is inserted into the limiting groove 606, thereby limiting the fixed rod 604 and further limiting the two clamping rods 601 after movement. When the two clamping rods 601 move relative to each other, they will drive the two first insulating sleeves 602 to contact the outer surface of the pin body 15 and generate a pressure on the top end of the pin body 15, tightening its top end, increasing the connection pressure between the pin body 15 and the insert body 11. Repeat the above operation to clamp the other three groups of pin bodies 15 and the insert body 11, so that the pin body 15 and the insert body 11 are in close contact, improving the tightness, preventing accidental vibration or impact from causing loosening between the insert body 11 and the pin body 15 and resulting in poor contact, ensuring the stability and reliability of the electrical connection, thus ensuring the normal operation of the circuit, improving the effect of current overload protection, and solving the problem that in the intelligent overload protection device of the main control board of household appliances, the insert at the bottom of the relay needs to be inserted into the pins of the base. When subjected to vibration or external impact, a simple plug-in connection will cause the insert to loosen, resulting in poor contact between the insert and the pins, affecting the normal operation of the relay and being unfavorable for current overload protection. The Hall current sensor 9 detects the current of the main control board of household appliances and transmits the detection result to the microcontroller 8 for identification and analysis. When it is found that the current is overloaded, the microcontroller 8 sends an instruction to cut off the circuit. When the relay body 5 receives the instruction to cut off the circuit from the microcontroller 8, the electromagnetic coil is energized to generate a magnetic field, attracting the armature and disconnecting the contacts, thereby cutting off the power supply of the overloaded circuit, realizing intelligent overload protection and preventing the adverse effects of current overload on household appliances.

[0038] Example 2: As Figures 1-7 shown, a second housing 2 is installed on the top of the first housing 1 through bolts. An installation plate 3 is installed on the bottom surface inside the first housing 1 through bolts. A bottom case 4 is arranged on the top of the installation plate 3. A relay body 5 is arranged on the top of the bottom case 4. A clamping assembly 6 and an anti-friction assembly 7 are arranged inside the bottom case 4. The anti-friction assembly 7 includes eight protective ejector rods 701. Second insulating sleeves 702 are fixedly connected to the outer surfaces of the eight protective ejector rods 701. Every two horizontally distributed protective ejector rods 701 among the eight protective ejector rods 701 form a group. V-shaped blocks 703 are fixedly installed at both ends of the four groups of protective ejector rods 701. Fixed shafts 704 are fixedly installed on the outer surfaces of the eight V-shaped blocks 703. Every four vertically distributed fixed shafts 704 among the eight fixed shafts 704 form a group. Connecting plates 705 are fixedly installed on the outer surfaces of the two groups of fixed shafts 704. Two metal plates 706 are fixedly installed at the bottoms of the two connecting plates 705. Angle plates 707 are fixedly installed on the outer surfaces of both sides of the bottom case 4. Two magnets 708 are fixedly installed on the tops of the two angle plates 707. The tops of the four magnets 708 are magnetically connected to the bottoms of the four metal plates 706 respectively. Four movable holes 14 are opened on the outer surfaces of both sides of the bottom case 4 near the bottom. The outer surfaces of the eight fixed shafts 704 are respectively movably embedded in the eight movable holes 14. A microcontroller 8 is installed on the bottom surface inside the first housing 1 through screws. A Hall current sensor 9 is installed on the bottom surface inside the first housing 1 through screws. An alarm 10 is installed on the bottom surface inside the first housing 1 through screws. A plurality of insert bodies 11 are arranged at the bottom of the relay body 5. A plurality of jacks 12 are opened on the top of the bottom case 4. Four adjusting holes 13 are opened on the outer surfaces of both sides of the bottom case 4. A plurality of pin bodies 15 are arranged on the top of the installation plate 3. The outer surfaces of the plurality of insert bodies 11 are respectively movably embedded in the plurality of jacks 12 and the plurality of pin bodies 15.

[0039] In this embodiment, during use, turn the two threaded shafts 609 to screw them outwards from the connecting groove 607, drive the double-headed connecting rod 615 to move outwards, thereby driving the moving block 613 and the limiting rod 611 to move outwards, so that one end of the limiting rod 611 moves out of the limiting groove 606. The fixed rod 604 loses its limit, and the compressed return spring 605 starts to rebound, pushing the two clamping rods 601 to move in the opposite direction, so that the fixed rod 604 is reset, and the positions of the limiting groove 606 and the limiting rod 611 are staggered. Through the reverse movement of the clamping rod 601, drive the first insulating sleeve 602 to move in the opposite direction, separate from the pin body 15, loosen the tightening of the pin body 15, repeat the above operation, and loosen the tightening of the other three groups of pin bodies 15. Then pull up the connecting plate 705 outwards, so that the metal plate 706 is separated from the magnet 708, and drive the plurality of fixed shafts 704 and the V-shaped block 703 to move upwards, so that the protective ejector rod 701 moves upwards inside the pin body 15, slightly push outwards the top end of the pin body 15, thereby increasing the space range between the pin body 15 and the insert body 11, preventing a large friction between the insert body 11 and the pin body 15 when the insert body 11 is pulled out from inside the pin body 15 later, which may cause damage to the pin body 15 and affect the normal operation of the device. Under the action of the anti-friction component 7, the protective effect is achieved, which is beneficial to improving the overload protection effect.

[0040] Embodiment 3: As Figure 11 shown, an intelligent overload protection system for a main control board of a household appliance includes: a current detection module 16, a micro-control module 17, a drive circuit module 18, a protection execution module 19, a storage and recording module 20, a reset and control module 21, an alarm module 22, and a communication module 23; the current detection module 16 is used to monitor the current magnitude in the circuit in real time and convert the current signal into an electrical signal, the micro-control module 17 is used to receive the signal and issue a control instruction to start the protection measure, the drive circuit module 18 is used to provide a drive signal for the protection execution module 19, the protection execution module 19 is used to take actual protection actions, the storage and recording module 20 is used to store and record the detected current data, the reset and control module 21 is used to restore the system to the normal working state after the fault is eliminated, the alarm module 22 is used for abnormal alarm reminders, and the communication module 23 is used to send the alarm information to the user.

[0041] In this embodiment, during use, the current detection module 16 mainly monitors the magnitude of the current when the main control board of the household appliance is working in real time, and converts the current signal into an electrical signal that is convenient for processing, such as a voltage signal, providing a data basis for subsequent determination of whether there is an overload. Then, the electrical signal is transmitted to the micro-control module 17. The micro-control module 17 receives the detected electrical signal, compares and analyzes it with a preset overload threshold, and makes decisions based on the comparison result, such as issuing a control instruction to initiate a protection measure, recording relevant data, etc. The drive circuit module 18 amplifies and shapes the weak control signal output by the micro-control module 17 and provides a suitable drive waveform to meet the drive requirements of the protection execution module 19, ensuring that the protection execution module 19 can act reliably. The protection execution module 19 takes actual protection actions according to the instructions of the micro-control module 17, such as cutting off the circuit, limiting the power, etc., to prevent the overload current from damaging the electrical equipment. In addition, the storage and recording module 20 stores and records relevant parameters, such as the overload threshold, protection action time, etc., and at the same time records the detailed information of the overload event, such as the time, number of times, and magnitude of the current when the overload occurs, for the user or maintenance personnel to view and analyze later to find the cause of the fault. When an abnormal situation such as an overload is detected, the micro-control module 17 also controls the alarm module 22 to issue an alarm, reminding the user to pay attention to the problem with the electrical equipment, and sending the overload information and alarm information to the user's mobile phone through the communication module 23, facilitating the user to understand the situation in a timely manner. The reset and control module 21 is used to restore the system to the normal working state after troubleshooting, and can also manually trigger the protection action or set and control the system when necessary, such as a manual reset button, control switch, etc.

[0042] The effect and working principle achieved by the entire mechanism are as follows: insert the insert body 11 downward into the socket 12 and into the pin body 15, and then press the two ends of the two clamping rods 601, so that the two clamping rods 601 move relative to each other in the corresponding adjustment holes 13, and drive the fixing block 603 to move, so that the reset spring 605 is squeezed and contracted together, and one end of the fixing rod 604 slides toward the inside of the connecting groove 607, and at the same time, the limiting rod 611 moves on the outer surface of the fixing rod 604. When the limiting groove 606 moves to the limiting rod 611, the limiting spring 612 begins to rebound, driving the moving block 613 to move, so that one end of the limiting rod 611 is inserted into the limiting groove 606, thereby limiting the fixing rod 604, and further limiting the two clamping rods 601 after movement. When the two clamping rods 601 move relative to each other, the two first insulating sleeves 602 will be driven to contact the outer surface of the pin body 15, and pressure will be generated at the top of the pin body 15, so that the top of the pin body 15 is tightened, and the connection pressure between the pin body 15 and the plug body 11 is increased. Repeat the above operation to clamp the other three groups of pin bodies 15 and the plug body 11, so that the pin body 15 and the plug body 11 are in tight contact, improving the tightness, ensuring the stability and reliability of the electrical connection, thereby ensuring the normal operation of the circuit and improving the effect of current overload protection. The current of the main control board of the household appliance is detected by the Hall current sensor 9, and the detection result is transmitted to the microcontroller 8 for identification and analysis. When the current overload is found, the microcontroller 8 sends a circuit cut-off instruction. When the relay body 5 receives the circuit cut-off instruction from the microcontroller 8, it cuts off the power supply of the overload circuit to achieve intelligent overload protection. The two threaded shafts 609 are screwed out of the connection groove 607, and the double-headed connection rod 615 is driven to move outward, thereby driving the moving block 613 and the limiting rod 611 to move outward, so that one end of the limiting rod 611 is moved out of the limiting groove 606, the fixed rod 604 loses its limit, and the squeezed reset spring 605 begins to rebound, pushing the two clamping rods 601 to move in the opposite direction, so that the fixed rod 604 is reset, and the limiting groove 606 is staggered with the limiting rod 611. Through the reverse movement of the clamping rod 601, the first insulating sleeve 602 is driven to move in the opposite direction and separate from the pin body 15, loosening the tightening of the pin body 15, and repeating the above operation to loosen the tightening of the other three groups of pin bodies 15. Then, the connecting plate 705 is pulled outward to separate the metal plate 706 from the magnet 708, and the multiple fixed shafts 704 and the V-block 703 are driven to move upward, so that the protective push rod 701 moves upward inside the pin body 15, and the top of the pin body 15 is slightly pushed outward, thereby increasing the space range between the pin body 15 and the plug body 11, and preventing the plug body 11 from being pulled out from the pin body 15 later. Large friction is generated between the plug body 11 and the pin body 15, causing damage to the pin body 15, affecting the normal operation of the equipment.The current detection module 16 mainly monitors the magnitude of the current when the main control board of the household appliance is working in real time, and converts the current signal into an electrical signal that is convenient for processing. The micro-control module 17 receives the detected electrical signal, compares and analyzes it with a preset overload threshold, and makes a decision based on the comparison result. The drive circuit module 18 amplifies and shapes the weak control signal output by the micro-control module 17 and provides a suitable drive waveform to meet the drive requirements of the protection execution module 19. The protection execution module 19 takes actual protection actions according to the instructions of the micro-control module 17. In addition, the storage and recording module 20 stores and records relevant parameters, such as the overload threshold, protection action time, etc., and at the same time records the detailed information of the overload event, such as the time, frequency, and magnitude of the overload occurrence. When abnormal situations such as overload are detected, the micro-control module 17 also controls the alarm module 22 to issue an alarm to remind the user to pay attention to problems with the electrical equipment, and sends the overload information and alarm information to the user's mobile phone through the communication module 23, facilitating the user to understand the situation in a timely manner. The reset and control module 21 is used to restore the system to the normal working state after troubleshooting, and can also manually trigger the protection action or set and control the system when necessary, such as a manual reset button, control switch, etc.

[0043] Among them, the relay body 5, the microcontroller 8, the Hall current sensor 9, and the alarm 10 are all prior arts, and their components and operating principles are all publicly known technologies, and will not be explained in detail here.

[0044] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An intelligent overload protection device for a main control board of a household appliance, comprising a first housing (1), a second housing (2) being mounted on the top of the first housing (1) by bolts, characterized in that: A mounting plate (3) is mounted on the bottom surface of the first housing (1) by means of bolts, a bottom shell (4) is arranged on the top of the mounting plate (3), a relay body (5) is arranged on the top of the bottom shell (4), and a clamping assembly (6) and an anti-friction assembly (7) are arranged inside the bottom shell (4); The clamping assembly (6) comprises eight clamping rods (601), the outer surfaces of the eight clamping rods (601) are all fixedly connected with a first insulating sleeve (602), the outer surfaces of the eight clamping rods (601) are all fixedly mounted with two fixing blocks (603), wherein a fixing rod (604) is fixedly mounted on one side outer surface of the eight fixing blocks (603), the outer surfaces of the eight fixing rods (604) are all movably sleeved with a return spring (605), and the outer surfaces of the eight fixing rods (604) are A limiting groove (606) is provided near one end, wherein both ends of the four clamping rods (601) are provided with connecting grooves (607), and the outer surfaces of both sides of the other eight fixing blocks (603) are provided with movable holes (608), the interiors of the eight connecting grooves (607) are threadedly embedded with threaded shafts (609), the interiors of the eight connecting grooves (607) are fixedly installed with fixing rings (610), and the interiors of the eight fixing rings (610) are movably embedded with limiting rods (611).

2. The intelligent overload protection device for the main control board of a household appliance according to claim 1, characterized in that: The outer surfaces of the eight limit rods (611) are movably sleeved with limit springs (612), one ends of the eight limit rods (611) are fixedly mounted with moving blocks (613), one ends of the eight limit rods (611) are provided with sliding grooves (614), the interiors of the eight threaded shafts (609) are movably embedded with double-headed connecting rods (615), one ends of the eight double-headed connecting rods (615) are movably embedded in the interiors of the eight sliding grooves (614), and the outer surfaces of the eight double-headed connecting rods (615) are movably embedded in the interiors of the eight moving blocks (613).

3. The intelligent overload protection device for the main control board of a household appliance according to claim 2, characterized in that: The anti-friction component (7) comprises eight protective top rods (701), the outer surfaces of the eight protective top rods (701) are all fixedly connected with a second insulating sleeve (702), the eight protective top rods (701) are each a group of two protective top rods (701) distributed laterally, both ends of the four groups of protective top rods (701) are fixedly mounted with V-shaped blocks (703), the outer surfaces of one side of the eight V-shaped blocks (703) are all fixedly mounted with fixed shafts (704), and the eight fixed shafts (704) are each a group of four fixed shafts (704) distributed longitudinally.

4. The intelligent overload protection device for the main control board of a household appliance according to claim 3, characterized in that: The outer surfaces of the two groups of fixed shafts (704) are fixedly mounted with connecting plates (705), the bottoms of the two connecting plates (705) are fixedly mounted with two metal plates (706), the outer surfaces of both sides of the bottom shell (4) are fixedly mounted with cross plates (707), the tops of the two cross plates (707) are fixedly mounted with two magnets (708), the tops of the four magnets (708) are magnetically connected to the bottoms of the four metal plates (706), the outer surfaces of both sides of the bottom shell (4) are opened with four movable holes (14) near the bottom, and the outer surfaces of the eight fixed shafts (704) are movably embedded in the eight movable holes (14) respectively.

5. The intelligent overload protection device for the main control board of a household appliance according to claim 4, characterized in that: A microcontroller (8) is installed on the bottom surface of the first shell (1) by screws, a Hall current sensor (9) is installed on the bottom surface of the first shell (1) by screws, and an alarm (10) is installed on the bottom surface of the first shell (1) by screws. A plurality of plug bodies (11) are arranged at the bottom of the relay body (5), a plurality of jacks (12) are provided at the top of the bottom shell (4), four adjustment holes (13) are provided on the outer surfaces of both sides of the bottom shell (4), a plurality of pin bodies (15) are arranged at the top of the mounting plate (3), and the outer surfaces of the plurality of plug bodies (11) are movably embedded in the plurality of jacks (12) and the plurality of pin bodies (15), respectively.

6. The intelligent overload protection device for the main control board of a household appliance according to claim 5, characterized in that: Each of the eight adjustment holes (13) distributed laterally comprises two adjustment holes (13) forming a group, each of the eight clamping rods (601) distributed laterally comprises two clamping rods (601) forming a group, the outer surfaces of the four groups of clamping rods (601) are movably embedded in the four groups of adjustment holes (13), the outer surfaces of the eight first insulating sleeves (602) are movably embedded in the bottom shell (4), and one end of the eight reset springs (605) is fixedly mounted on the outer surface of one side of the eight fixed blocks (603).

7. The intelligent overload protection device for the main control board of a household appliance according to claim 6, characterized in that: The other ends of the eight return springs (605) are respectively fixedly mounted on the outer surfaces of the other eight fixed blocks (603); the outer surfaces of the eight fixed rods (604) are respectively movably embedded in the interiors of the eight movable holes (608); and one ends of the eight fixed rods (604) are respectively movably penetrated into the interiors of the eight connection grooves (607).

8. The intelligent overload protection device for the main control board of a household appliance according to claim 7, characterized in that: The other ends of the eight limit rods (611) are respectively in contact with the outer surfaces of the eight fixed rods (604), one ends of the eight limit springs (612) are respectively fixedly connected to the outer surfaces of one side of the eight fixed rings (610), the other ends of the eight limit springs (612) are respectively fixedly connected to the outer surfaces of one side of the eight moving blocks (613), and the outer surfaces of the eight moving blocks (613) are respectively movably embedded in the interior of the eight connecting grooves (607).

9. The intelligent overload protection device for the main control board of a household appliance according to claim 8, characterized in that: Also includes: An intelligent overload protection system for a main control board of a household appliance, comprising: a current detection module (16), a microcontroller module (17), a drive circuit module (18), a protection execution module (19), a storage and recording module (20), a reset and control module (21), an alarm module (22) and a communication module (23); The current detection module (16) is used to monitor the current size in the circuit in real time and convert the current signal into an electrical signal. The microcontroller module (17) is used to receive the signal and issue a control instruction to start the protection measure. The drive circuit module (18) is used to provide a drive signal for the protection execution module (19).

10. The intelligent overload protection device for the main control board of a household appliance according to claim 9, characterized in that: The protection execution module (19) is used to take actual protection actions, the storage and recording module (20) is used to store and record detected current data, the reset and control module (21) is used to restore the system to a normal working state after troubleshooting, the alarm module (22) is used to alarm for abnormalities, and the communication module (23) is used to send alarm information to a user.

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