Electric blanket leakage protection device
By designing leakage protection devices for controlling circuit boards, electromagnetic switches and zero-sequence current transformers in the electric blanket, the risk of electric shock caused by the lack of leakage protection of the electric blanket is solved, and the function of quickly cutting off the power supply is achieved, improving safety.
Patent Information
- Application Number
- CN202421283687.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-06
- Publication Date
- 2025-05-13
- Estimated Expiration
- 2034-06-06
AI Technical Summary
Existing electric blankets lack leakage protection devices. Once leakage occurs, users will have greater risk of electric shock.
An electric blanket leakage protection device is designed, including a control circuit board, an electromagnetic switch and a zero-sequence current transformer. By detecting the leakage current in the circuit, an induced voltage signal is generated and converted into a switching signal, which is used to judge whether there is a leakage phenomenon and quickly cut off the power supply after detecting leakage.
Effectively prevent electric shock accidents, avoid unnecessary losses, and improve the safety of electric blankets.
Smart Images
Figure CN222869057U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of leakage protection, in particular to a leakage protection device for an electric blanket. Background Art
[0002] An electric blanket, also known as an electric mattress, is a contact electric heating appliance. It weaves or sews a special soft-cable electric heating element with standard insulation performance into the blanket in a snake-like shape. It emits heat when powered on. It is mainly used to increase the temperature in the bed when people sleep to achieve the purpose of heating. It can also be used to dehumidify bedding. It consumes little power, has adjustable temperature, is easy to use, and is widely used. However, fires caused by leakage of electric blankets still occur. There is a lack of leakage protection devices. Once leakage occurs, users are at greater risk of electric shock. Therefore, we propose an electric blanket leakage protection device that can quickly cut off the power supply when leakage occurs, thereby preventing electric shock accidents and avoiding unnecessary losses. Utility Model Content
[0003] 1. Technical issues to be resolved
[0004] In view of the deficiencies in the prior art, the utility model provides an electric blanket leakage protection device, which solves the problem that the user has a greater risk of electric shock once leakage occurs due to the lack of a leakage protection device.
[0005] (II) Technical solution
[0006] To achieve the above objectives, the utility model is implemented through the following technical solutions: an electric blanket leakage protection device, comprising two protection boxes, two pairs of screws are arranged between the two protection boxes, heating elements are arranged at the rear of the two protection boxes, the connecting ends of the heating elements are fixedly connected with connectors, control circuit boards, electromagnetic switches and zero-sequence current transformers are arranged in the two protection boxes, protection tubes are arranged on the front and rear sides of the two protection nets, protective covers are fixedly connected to the opposite surfaces of the two protection tubes, and the two protection covers are respectively movably connected to the two protection boxes.
[0007] As a preferred technical solution of the utility model, the upper surface of the two protective boxes located at the top is provided with two groups of heat dissipation grooves and two card slots, and the two card slots are fixedly connected with protective nets.
[0008] As a preferred technical solution of the utility model, the zero-sequence current transformer is fixedly connected to the lower protection box of the two protection boxes, and two connecting wires are arranged between the zero-sequence current transformer and the rear protection cover of the two protection covers.
[0009] As a preferred technical solution of the utility model, a reset switch is arranged on the upper surface of the control circuit board, and the reset switch is movably connected with the upper protection box of the two protection boxes.
[0010] As a preferred technical solution of the utility model, two pairs of connecting wires three are arranged between the electromagnetic switch and the zero-sequence current transformer and the control circuit board, and two connecting wires two are arranged above the electromagnetic switch. The two connecting wires two are respectively fixedly connected to the protective covers located in the front of the two protective covers.
[0011] (III) Beneficial effects
[0012] 1. The control circuit board is responsible for the induced voltage signal generated by the zero-sequence current transformer and converts it into a switch signal, which is used to amplify, filter and compare the induced voltage signal to determine whether there is a leakage phenomenon. After detecting the leakage phenomenon, the control circuit board transmits the signal to the electromagnetic switch. The electromagnetic switch is responsible for cutting off the power supply. The electromagnetic switch uses the electromagnet to attract to realize the power on and off. When leakage occurs, the power supply will be cut off quickly, thereby preventing electric shock accidents and avoiding unnecessary losses.
[0013] 2. The upper one of the two protective boxes is penetrated with two sets of heat dissipation slots to ensure air circulation in the protective box. The control circuit board will generate heat during operation. The opening of the two sets of heat dissipation slots increases the efficiency of heat exchange between the control circuit board and the protective box. Two protective nets are respectively provided on the two sets of heat dissipation slots to protect them and avoid the intrusion of foreign objects, thereby improving the overall safety. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the utility model in conjunction with the accompanying drawings.
[0015] Figure 1 It is the overall structure diagram of the utility model;
[0016] Figure 2 This is a structural diagram of the protection box in the utility model;
[0017] Figure 3 This is a structural diagram of a control circuit board in the utility model;
[0018] Figure 4 This is a structural diagram of the electromagnetic switch in the utility model.
[0019] Legend: 1. Protective box; 2. Heating element; 3. Connector; 4. Protective tube; 5. Protective net; 6. Screws; 7. Heat sink; 8. Card slot; 9. Protective cover; 10. Electromagnetic switch; 11. Control circuit board; 12. Connection line one; 13. Zero-sequence current transformer; 14. Reset switch; 15. Connection line two; 16. Connection line three. DETAILED DESCRIPTION
[0020] The embodiment of the present application provides an electric blanket leakage protection device, which effectively solves the problem of lack of leakage protection device. Once leakage occurs, the user has a greater risk of electric shock. The control circuit board 11 is responsible for the induced voltage signal generated by the zero-sequence current transformer 13, and converts it into a switch signal for amplifying, filtering and comparing the induced voltage signal to determine whether there is a leakage phenomenon. After the leakage phenomenon is detected, the control circuit board 11 transmits the signal to the electromagnetic switch 10. The electromagnetic switch 10 is responsible for cutting off the power supply. The electromagnetic switch 10 uses the electromagnet to attract to realize the power on and off. When leakage occurs, the power supply will be quickly cut off, thereby preventing electric shock accidents and avoiding unnecessary losses. Example
[0021] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the technical solution in the embodiment of the present application effectively solves the problem of lack of leakage protection device. Once leakage occurs, the user has a greater risk of electric shock. The overall idea is as follows:
[0022] In view of the problems existing in the prior art, the utility model provides an electric blanket leakage protection device, comprising two protection boxes 1, two pairs of screws 6 are arranged between the two protection boxes 1, heating elements 2 are arranged at the rear of the two protection boxes 1, and the connection ends of the heating elements 2 are fixedly connected with connectors 3, and control circuit boards 11, electromagnetic switches 10 and zero-sequence current transformers 13 are arranged in the two protection boxes 1, and protection tubes 4 are arranged on the front and rear sides of the two protection nets 5, and the opposite surfaces of the two protection tubes 4 are fixedly connected with protection sleeves 9, and the two protection sleeves 9 are respectively movably connected with the two protection boxes 1. When the electric blanket is in use, it is turned on and off by a reset switch 14 arranged on the protection box 1, and the two A zero-sequence current transformer 13 is arranged in a protective box 1. The zero-sequence current transformer 13 is used to detect leakage current in the circuit. It has a ring structure. Two connecting wires 12 pass through the magnetic ring of the transformer to form a closed magnetic circuit. The two connecting wires 12, the two connecting wires 2 15 and the two pairs of connecting wires 3 16 are the live wire and the neutral wire respectively. When there is leakage in the circuit, the zero-sequence current transformer 13 will generate an induced voltage to drive the subsequent circuit to work. The control circuit board 11 is responsible for the induced voltage signal generated by the zero-sequence current transformer 13, and converts it into a switch signal, which is used to amplify, filter and compare the induced voltage signal to determine whether there is leakage.
[0023] The upper surface of the protective box 1 located at the top of the two protective boxes 1 is provided with two groups of heat dissipation grooves 7 and two card slots 8, and the two card slots 8 are fixedly connected with the protective net 5. The zero-sequence current transformer 13 is fixedly connected to the protective box 1 located at the bottom of the two protective boxes 1. Two connecting lines 12 are arranged between the zero-sequence current transformer 13 and the protective cover 9 located at the rear of the two protective covers 9. When leakage is detected, the control circuit board 11 transmits the signal to the electromagnetic switch 10, and the electromagnetic switch 10 is responsible for cutting off the power supply. The electromagnetic switch 10 uses the electromagnet to attract to realize the on and off of the power supply. When leakage occurs, the power supply will be cut off quickly, thereby preventing electric shock accidents and avoiding unnecessary losses.
[0024] A reset switch 14 is provided on the upper surface of the control circuit board 11, and the reset switch 14 is movably connected to the upper protective box 1 of the two protective boxes 1. Two pairs of connecting wires 3 16 are provided between the electromagnetic switch 10 and the zero-sequence current transformer 13 and the control circuit board 11. Two connecting wires 2 15 are provided above the electromagnetic switch 10. The two connecting wires 2 15 are respectively fixedly connected to the front protective covers 9 of the two protective covers 9. Two groups of heat dissipation grooves 7 are opened through the upper protective box 1 of the two protective boxes 1. The air circulation in the protective box 1 is ensured by the two groups of heat dissipation grooves 7. The control circuit board 11 generates heat during operation. The opening of the two groups of heat dissipation grooves 7 increases the efficiency of heat exchange between the control circuit board 11. Two protective nets 5 are respectively provided on the two groups of heat dissipation grooves 7 to protect them and avoid the intrusion of foreign objects from the outside, thereby improving the overall safety.
[0025] Working principle:
[0026] When the electric blanket is in use, it is turned on and off by the reset switch 14 set on the protection box 1. The two protection boxes 1 are provided with zero-sequence current transformers 13. The zero-sequence current transformer 13 is used to detect leakage current in the circuit. It has a ring structure. The two connecting wires 12 pass through the magnetic ring of the transformer to form a closed magnetic circuit. The two connecting wires 12, the two connecting wires 2 15 and the two pairs of connecting wires 3 16 are the live wire and the neutral wire respectively. When there is leakage in the circuit, the zero-sequence current transformer 13 will generate an induced voltage to drive the subsequent circuit to work. The control circuit board 11 is responsible for the induced voltage signal generated by the zero-sequence current transformer 13 and converts it into a switch signal for amplifying, filtering and comparing the induced voltage signal to determine whether There is a leakage phenomenon. When the leakage phenomenon is detected, the control circuit board 11 transmits a signal to the electromagnetic switch 10. The electromagnetic switch 10 is responsible for cutting off the power supply. The electromagnetic switch 10 uses the electromagnet to attract to realize the on and off of the power supply. When leakage occurs, the power supply will be quickly cut off to prevent electric shock accidents and avoid unnecessary losses. The upper protective box 1 of the two protective boxes 1 is penetrated by two groups of heat dissipation grooves 7. The air circulation in the protective box 1 is guaranteed by the two groups of heat dissipation grooves 7. The control circuit board 11 will generate heat during operation. The opening of the two groups of heat dissipation grooves 7 increases the efficiency of the heat exchange between the control circuit board 11. Two protective nets 5 are respectively provided on the two groups of heat dissipation grooves 7 to protect them and avoid the intrusion of foreign objects from the outside, thereby improving the overall safety.
[0027] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly explaining the present invention, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from this are still within the scope of protection of the present invention.
Claims
1. An electric blanket leakage protection device, comprising two protection boxes (1), characterized in that: Two pairs of screws (6) are arranged between the two protection boxes (1), and a heating element (2) is arranged behind the two protection boxes (1); The connection end of the heating element (2) is fixedly connected to a connector (3), and a control circuit board (11), an electromagnetic switch (10) and a zero-sequence current transformer (13) are arranged in the two protection boxes (1); the upper protection box (1) of the two protection boxes (1) is provided with two groups of heat dissipation grooves (7) and two card slots (8) on its upper surface, and a protection net (5) is fixedly connected in the two card slots (8).
2. An electric blanket leakage protection device as claimed in claim 1, characterized in that: Protection tubes (4) are provided on both the front and rear sides of the two protection nets (5), and protection sleeves (9) are fixedly connected to the opposite surfaces of the two protection tubes (4); The two protective sleeves (9) are respectively movably engaged with the two protective boxes (1).
3. An electric blanket leakage protection device as claimed in claim 2, characterized in that: The zero-sequence current transformer (13) is fixedly connected to the lower protection box (1) of the two protection boxes (1); Wherein, two connecting wires 1 (12) are arranged between the zero-sequence current transformer (13) and the protective sleeve (9) located at the rear of the two protective sleeves (9).
4. An electric blanket leakage protection device as claimed in claim 3, characterized in that: A reset switch (14) is provided on the upper surface of the control circuit board (11); The reset switch (14) is movably connected to the upper protection box (1) of the two protection boxes (1).
5. An electric blanket leakage protection device as claimed in claim 4, characterized in that: Two pairs of connecting wires (16) are provided between the electromagnetic switch (10) and the zero-sequence current transformer (13) and the control circuit board (11); Wherein, two connecting wires 2 (15) are arranged above the electromagnetic switch (10), and the two connecting wires 2 (15) are respectively fixedly connected to the protective sleeves (9) located in the front of the two protective sleeves (9).