CN210112314U - Electric blanket with double heating wires and overheat protection function - Google Patents
Electric blanket with double heating wires and overheat protection function Download PDFInfo
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- CN210112314U CN210112314U CN201821794032.3U CN201821794032U CN210112314U CN 210112314 U CN210112314 U CN 210112314U CN 201821794032 U CN201821794032 U CN 201821794032U CN 210112314 U CN210112314 U CN 210112314U
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Abstract
An electric blanket with double-wire heating and overheat protection functions is composed of internal and external heating systems and overheat feedback safety protection system, and is mainly used for electric blankets and similar heating appliances.
Description
Technical Field
The utility model relates to a double-wire heating electric blanket capable of overheat protection, belonging to the field of household appliances.
Background
The electric blanket is used as an economic and applicable bed heating appliance, and the popularization rate is higher and higher. Especially various high, medium and low grade electric blankets are more and more popular with users. However, with the popularization of relevant national standards and the improvement of water products of people's life, people pay more attention to the quality of life and the environmental protection. The electric blankets on the market are required to face a problem in use, namely, the national standard requirements on thermal shock are met. The recommended temperature of the electric blanket can not exceed 37 ℃ to meet the national standard requirement of thermal shock. Therefore, the utility model designs an electric blanket which can generate heat with double wires and can protect overheat especially aiming at the situation. The utility model can also be used for heating appliances with similar purposes.
Disclosure of Invention
The utility model relates to a double-wire heating electric blanket capable of overheat protection, which is designed aiming at the thermal shock standard requirements and is mainly used for electric blankets and warming appliances with similar purposes.
The utility model provides a technical scheme that its technical problem adopted is: the system comprises an internal heating system, an external heating system and an overheating feedback safety protection system. The internal and external heating systems are respectively composed of specially made '3 + 2' spiral heating wires. The specially made '3 + 2' spiral heating wire is composed of a heating wire 1, a heating wire 2, a special PE layer 3 between the two heating wires, and an outermost PVC layer 4. The overheating feedback safety protection system consists of a thermal fuse FT, protection resistors R1 and R2, protection diodes VD1 and VD 2. The protection resistors R1 and VD1 are connected in series and then connected with the heating wire 1 in parallel, the protection resistors R2 and VD2 are connected in series and then connected with the heating wire 2 in parallel, and then the two circuits are connected with the thermal fuse FT in series to form a closed loop. The thermal fuse FT is placed between the protective resistors R1, R2, and the three are abutted side by side.
The beneficial effects of the utility model are that, utilize foretell special preparation "3 + 2" spiral heating wire and supporting circuit with it, adopt foretell connected mode to constitute, "3 + 2" spiral heating wire inlayer can heat respectively under the normal operating condition, so the heating power is different because its resistance value is different, just so can satisfy the requirement of national standard about the thermal shock. When the electric blanket is over-temperature or in other abnormal working states, a feedback signal is input into the protection system, the protection resistor is electrified to work and the thermal fuse is fused, so that the controller is in a permanent protection state.
The present invention will be described in further detail with reference to the accompanying drawings.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a structural schematic diagram of a 3+2 spiral heating wire.
In the figure, 1 is a heating wire 1, 2 is a heating wire 2, 3 is a special PE layer, 4 is a PVC layer, 5 is an internal and external heating system respectively, and 6 is an overheating feedback safety protection system.
Detailed Description
As shown in fig. 1 and 2, the utility model comprises an internal and external heating system (5) and an overheating feedback safety protection system (6). The inner and outer heating systems (5) are composed of specially made '3 + 2' spiral heating wires. The specially made 3+2 spiral heating wire is composed of a heating wire (1), a heating wire (2), a special PE layer (3) between the two heating wires, and an outermost PVC layer (4). The overheating feedback safety protection system (6) is composed of a thermal fuse FT, protection resistors R1 and R2, protection diodes VD1 and VD 2. The protective resistors R1 and VD1 are connected in series and then connected in parallel with the heating wire (1), the protective resistors R2 and VD2 are connected in series and then connected in parallel with the heating wire (2), and then the two circuits are connected in series with the thermal fuse FT to form a closed loop. The thermal fuse FT is placed between the protective resistors R1, R2, and the three are abutted side by side.
Switch on, commercial power 220V ~ gets into through protective tube FU, thermal fuse FT, switch, the utility model discloses begin to work. The two ends of the heating wire (1) and the heating wire (2) of the inner layer of the 3+2 spiral heating wire are respectively connected with the points H1-H2 and H3-H4 of the circuit. After the power is switched on, the heating wire (1) and the heating wire (2) respectively generate heat, and the heating power is different because the resistance values are different, so that the requirements of national standards on thermal shock can be met, and an internal and external heating system (5) is also formed. Meanwhile, the heating wire (1) and the heating wire (2) are respectively connected with protection resistors R2 and VD2 and protection resistors R1 and VD1 in the overheating protection system (6) in parallel and then connected with the thermal fuse FT in series. When the special PE layer (3) between the heating wire (1) and the heating wire (2) is melted due to high temperature, generated leakage current passes through the protective resistors R1 and R2 and the protective diodes VD1 and VD2 in the overheating protection system (6), the thermal fuse FT forms a loop, the protective resistors R1 and R2 generate heat, and the protective resistors R1 and R2 and the thermal fuse FT are arranged side by side and close to each other. The thermal fuse FT is blown. The circuit is placed in a permanent protection state.
The above description is only for the preferred embodiment of the present invention, and for those skilled in the art, there are variations on the detailed description and the application scope according to the idea of the present invention, and the content of the description should not be construed as a limitation to the present invention.
Claims (1)
1. An electric blanket with double-wire heating and overheating protection functions is characterized by comprising an internal heating system (5) and an external heating system (6) which are respectively connected with an overheating feedback safety protection system; the inner and outer heating systems (5) are composed of specially manufactured '3 + 2' spiral heating wires; the specially made 3+2 spiral heating wire consists of a heating wire (1), a heating wire (2), a special PE layer (3) between the two heating wires and an outermost PVC layer (4); the overheating feedback safety protection system (6) consists of a thermal fuse FT, protection resistors R1 and R2, protection diodes VD1 and VD 2; the protection resistors R1 and VD1 are connected in series and then connected with the heating wire (1) in parallel, the protection resistors R2 and VD2 are connected in series and then connected with the heating wire (2) in parallel, and then the two circuits are connected with the thermal fuse FT in series to form a closed loop; the thermal fuse FT is placed between the protective resistors R1, R2, and they are closely arranged side by side.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2017215914565 | 2017-11-24 | ||
| CN201721591456 | 2017-11-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210112314U true CN210112314U (en) | 2020-02-21 |
Family
ID=69529591
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821794032.3U Active CN210112314U (en) | 2017-11-24 | 2018-11-01 | Electric blanket with double heating wires and overheat protection function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210112314U (en) |
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2018
- 2018-11-01 CN CN201821794032.3U patent/CN210112314U/en active Active
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