Single-end-connected double-helix full-line protection multi-temperature-zone heating cable and electric blanket
By designing a single-head connected double helix full-line protection multi-temperature zone heating cable in an electric blanket, using temperature safety TF, unidirectional thyristor, inner heating wire, diode D2, outer heating wire and protection circuit, the solution is solved The safety problem of short circuit between the inner heating wire and the outer heating wire is achieved, and multi-zone temperature heating and higher safety are achieved.
Patent Information
- Application Number
- CN202420101188.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-15
- Publication Date
- 2025-02-07
- Estimated Expiration
- 2034-01-15
AI Technical Summary
After the double-layer spiral heating coil in existing electric blankets is continuously powered and heated or damaged by external damage, the inner heating wire and the outer heating wire may be short-circuited, resulting in a safety accident.
A single-head connected double helix full-line protection multi-temperature zone heating cable is designed, using temperature fuse TF, unidirectional thyristor, inner heating wire, diode D2, outer heating wire, and protection The circuit, including resistor R1, resistor R2 and diode D1, builds a circuit protection structure through these components to avoid short circuits.
It effectively avoids the risk of short circuit between the inner heating wire and the outer heating wire, improves the safety of the use of electric blankets, and realizes temperature heating in multiple areas through double helix heating coils, improving the user experience.
Smart Images
Figure CN222441895U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a power supply heating cable and an electric blanket, in particular to a heating cable technology with a protective function applied in an electric blanket. Background Art
[0002] An electric blanket is a heated blanket, usually powered by electricity, that is used to provide warmth in cold weather. Electric blankets can be placed on a bed or sofa. Electric blankets generally have adjustable temperature control, which can be adjusted to suit individual needs.
[0003] like Figure 4 The figure shows the heating wire arrangement of an existing conventional electric blanket, which has two groups of spiral heating coils, that is, two heating temperature zones are formed by double-helix heating cables. Each group of heating coils needs to be connected to two connectors, and two groups of temperature zones need to be connected to four connectors. The connection of four connectors will cause local congestion of connectors and difficulty in wiring.
[0004] In order to solve this problem, a double-helix single-end wiring heating cable has been developed. When it is specifically used in an electric blanket, the electric blanket has a double-layer heating structure, which includes an inner layer structure and an outer layer structure. The inner layer structure and the outer layer structure are respectively provided with an inner layer heating wire and an outer layer heating wire. The two layers of heating cables are isolated from each other but stacked together; and the two layers of spiral heating coils are connected through two joints, thus avoiding the congestion problem of setting up four joints. However, when this double-layer spiral heating coil is actually used, due to continuous power supply and heating, or after being damaged by the outside world, the inner layer heating wire and the outer layer heating wire may be connected and short-circuited. This situation is dangerous and may easily cause safety accidents, so it is necessary to solve this technical problem. Utility Model Content
[0005] The main purpose of the utility model is to provide a technology with a temperature protection function to avoid the danger of accidents caused by a short circuit between an inner heating wire and an outer heating wire.
[0006] In order to achieve the above-mentioned purpose, the utility model provides a single-head-connected double-helix full-line protection multi-temperature zone heating cable, which has a temperature fuse TF, a one-way thyristor, an inner heating wire, a diode D2, and an outer heating wire connected in series in sequence, and the inner heating wire and the outer heating wire are both used to be arranged between two adjacent layers in an electric blanket for temperature heating;
[0007] It also has a protection circuit, which has a resistor R1, a resistor R2 and a diode D1. The resistors R1 and R2 are connected in parallel. The protection circuit is connected in parallel with the temperature fuse TF and the unidirectional thyristor. The current flows in the diode D1 and the diode D2 in opposite directions. The resistors R1 and R2 are arranged in a side area of the temperature fuse TF. The heat generated by the resistors R1 and R2 after heating is used to disconnect the temperature fuse TF.
[0008] Preferably, an isolation layer reinforcement layer is provided between the inner heating wire and the outer heating wire.
[0009] Preferably, a diode D2 is provided between the end point b of the inner heating wire and the front point c of the outer heating wire.
[0010] Preferably, the resistor R1 and the resistor R2 are respectively located on two sides of the temperature fuse TF.
[0011] The utility model provides an electric blanket with a double-helix full-circuit protection multi-temperature zone heating cable connected at a single end, which has an inner layer structure and an outer layer structure. The double-helix full-circuit protection multi-temperature zone heating cable connected at a single end has a temperature fuse TF, a one-way thyristor, an inner heating wire, a diode D2, and an outer heating wire connected in series in sequence. The inner heating wire and the outer heating wire are both used to be arranged between two adjacent layers in the electric blanket for temperature heating; the inner heating wire is arranged in the inner layer structure, and the outer heating wire is arranged in the outer layer structure;
[0012] It also has a protection circuit, which has a resistor R1, a resistor R2 and a diode D1. The resistors R1 and R2 are connected in parallel. The protection circuit is connected in parallel with the temperature fuse TF and the unidirectional thyristor. The current flows in the diode D1 and the diode D2 in opposite directions. The resistors R1 and R2 are arranged in a side area of the temperature fuse TF. The heat generated by the resistors R1 and R2 after heating is used to disconnect the temperature fuse TF.
[0013] The beneficial effects of the utility model are:
[0014] The electric blanket of the utility model has a double-layer structure, namely an inner layer structure and an outer layer structure, the inner layer structure is at the bottom, the outer layer structure is at the top, and the outer layer structure is close to the human body, and both the inner layer structure and the outer layer structure are provided with a group of heating coils to form multiple heating areas and realize the protection function, and the specific principle is as follows.
[0015] The utility model realizes the connection and control of the double-helix heating coil through two joints, thus avoiding the problem of congestion caused by setting up multiple joints. In addition, the double-helix heating coil can realize temperature heating in multiple areas, thus providing a better user experience.
[0016] In addition, a diode is connected to one end of the double-layer heating wire of the electric blanket to provide safety protection in the event of abnormal overheating.
[0017] Under normal working conditions, the negative half cycle of the alternating current passes through the temperature fuse TF, the one-way thyristor Q, the inner heating wire ab of the double-layer heating wire, the diode D2, and the outer heating wire cd, causing the heating wire to generate heat.
[0018] Under abnormal circumstances, due to an accident, any point A on the heating wire ab of the double-layer heating wire and any point B on the outer heating wire cd of the heating wire overheat and break through the isolation layer to short-circuit. At this time, the positive half cycle of the alternating current will pass through the temperature fuse TF, resistor R1, resistor R2, diode D1 and point A of the inner heating wire ab of the double-layer heating wire and point B of the outer heating wire cd of the heating wire, causing resistors R1 and R2 to be energized and heated, causing the temperature fuse TF to overheat and burn out, thereby cutting off the power supply of the product for protection.
[0019] The utility model combines the inner heating wire and the outer heating wire into one circuit, and avoids the short circuit hazard of the inner heating wire and the outer heating wire through the circuit protection structure, thereby improving the use safety. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.
[0021] Figure 1 It is a circuit diagram of a double-helix full-circuit protection multi-temperature zone heating cable with single-end connection of the utility model;
[0022] Figure 2 yes Figure 1 A large diagram of the circuit of the temperature fuse TF, resistor R1, resistor R2 and unidirectional thyristor components.
[0023] Figure 3 yes Figure 1 The amplification circuit diagram of the inner heating wire, diode D2, and outer heating wire.
[0024] Figure 4 This is a diagram of the arrangement of heating wires of an existing conventional electric blanket. DETAILED DESCRIPTION
[0025] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.
[0026] Multi-temperature zone heating cable example:
[0027] like Figures 1 to 3 As shown, the utility model provides a single-head-connected double-helix full-line protection multi-temperature zone heating cable, which has a temperature fuse TF, a one-way thyristor, an inner heating wire ab, a diode D2, and an outer heating wire cd connected in series in sequence, and the inner heating wire ab and the outer heating wire cd are both used to be arranged between two adjacent layers in the electric blanket for temperature heating;
[0028] It also has a protection circuit, which has a resistor R1, a resistor R2 and a diode D1. The resistors R1 and R2 are connected in parallel. The protection circuit is connected in parallel with the temperature fuse TF and the unidirectional thyristor. The current flows in the diode D1 and the diode D2 in opposite directions. The resistors R1 and R2 are arranged in a side area of the temperature fuse TF. The heat generated by the resistors R1 and R2 after heating is used to disconnect the temperature fuse TF.
[0029] Preferably, an isolation layer reinforcement layer is provided between the inner heating wire and the outer heating wire, so as to better avoid contact short circuit between the inner heating wire and the outer heating wire.
[0030] Preferably, a diode D2 is provided between the end point b of the inner heating wire and the front point c of the outer heating wire.
[0031] Preferably, the resistor R1 and the resistor R2 are respectively located on both sides of the temperature fuse TF. When arranged in physical space, the two resistors are respectively set on both sides of the temperature fuse TF to better form heat so that the temperature fuse is disconnected to play a protective role.
[0032] The beneficial effects of the utility model are:
[0033] The utility model realizes the connection and control of the double-helix heating coil through two joints, avoiding the congestion problem of setting up multiple joints, and the double-helix heating coil can realize temperature heating in multiple areas, providing a better user experience.
[0034] A diode is connected to one end of the double-layer heating wire of the electric blanket to provide safety protection in the event of abnormal overheating.
[0035] Under normal operation, the negative half cycle of AC passes through the temperature fuse TF, the one-way thyristor Q, the inner heating wire ab of the double-layer heating wire, the diode D2, and the outer heating wire cd, making the heating wire work and generate heat. Since the diode D1 and the diode D2 have opposite currents, and the resistors R1 and R2 are connected in series with the diode D1, the current will not flow through the resistors R1 and R2, so no heat will be generated.
[0036] Under abnormal circumstances, due to an accident, any point A on the heating wire ab of the double-layer heating wire and any point B on the outer heating wire cd of the heating wire overheat and break through the isolation layer to short-circuit. At this time, the positive half cycle of the alternating current will pass through the temperature fuse TF, resistor R1, resistor R2, diode D1 and point A of the inner heating wire ab of the double-layer heating wire and point B of the outer heating wire cd of the heating wire, causing resistors R1 and R2 to be energized and heated, causing the temperature fuse TF to overheat and burn out, thereby cutting off the power supply of the product for protection.
[0037] The utility model combines the inner heating wire and the outer heating wire into one circuit, and avoids the short circuit hazard of the inner heating wire and the outer heating wire through the circuit protection structure, thereby improving the use safety.
[0038] Electric blanket embodiment:
[0039] The double-helix full-circuit protection multi-temperature zone heating cable with single-end connection obtained in the above embodiment is applied to an electric blanket to obtain an electric blanket with a double-helix full-circuit protection multi-temperature zone heating cable with single-end connection. It has an inner layer structure and an outer layer structure, and the single-end connected double-helix full-circuit protection multi-temperature zone heating cable has a temperature fuse TF, a one-way thyristor, an inner heating wire, a diode D2, and an outer heating wire connected in series in sequence, and the inner heating wire and the outer heating wire are both used to be arranged between two adjacent layers in the electric blanket for temperature heating; the inner heating wire is arranged in the inner layer structure, and the outer heating wire is arranged in the outer layer structure;
[0040] It also has a protection circuit, which has a resistor R1, a resistor R2 and a diode D1. The resistors R1 and R2 are connected in parallel. The protection circuit is connected in parallel with the temperature fuse TF and the unidirectional thyristor. The current flows in the diode D1 and the diode D2 in opposite directions. The resistors R1 and R2 are arranged in a side area of the temperature fuse TF. The heat generated by the resistors R1 and R2 after heating is used to disconnect the temperature fuse TF.
[0041] Obviously, the described embodiments are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
Claims
1. An electric blanket with a double-helix full-circuit protection multi-temperature zone heating cable with single-end connection, characterized in that: It has an inner layer structure and an outer layer structure. The single-head-connected double-helix full-line protection multi-temperature zone heating cable has a temperature fuse TF, a one-way thyristor, an inner layer heating wire, a diode D2, and an outer layer heating wire connected in series in sequence. The inner layer heating wire and the outer layer heating wire are both used to be arranged between two adjacent layers in the electric blanket for temperature heating; the inner layer heating wire is arranged in the inner layer structure, and the outer layer heating wire is arranged in the outer layer structure; It also has a protection circuit, which has a resistor R1, a resistor R2 and a diode D1. The resistors R1 and R2 are connected in parallel. The protection circuit is connected in parallel with the temperature fuse TF and the unidirectional thyristor. The current flows in the diode D1 and the diode D2 in opposite directions. The resistors R1 and R2 are arranged in a side area of the temperature fuse TF. The heat generated by the resistors R1 and R2 after heating is used to disconnect the temperature fuse TF.
2. The single-end-connected double-helix full-line protection multi-temperature zone heating cable according to claim 1, characterized in that: An isolation layer reinforcement layer is provided between the inner heating wire and the outer heating wire; a diode D2 is provided between the end point b of the inner heating wire and the front point c of the outer heating wire; and resistors R1 and R2 are respectively located on both sides of the temperature fuse TF.
3. A double-helix full-line protection multi-temperature zone heating cable with single-end connection, characterized in that: It has a temperature fuse TF, a one-way thyristor, an inner heating wire, a diode D2, and an outer heating wire connected in series in sequence. The inner heating wire and the outer heating wire are both used to be arranged between two adjacent layers in the electric blanket for temperature heating; It also has a protection circuit, which has a resistor R1, a resistor R2 and a diode D1. The resistors R1 and R2 are connected in parallel. The protection circuit is connected in parallel with the temperature fuse TF and the unidirectional thyristor. The current flows in the diode D1 and the diode D2 in opposite directions. The resistors R1 and R2 are arranged in a side area of the temperature fuse TF. The heat generated by the resistors R1 and R2 after heating is used to disconnect the temperature fuse TF.
4. The single-end-connected double-helix full-line protection multi-temperature zone heating cable according to claim 3, characterized in that: An isolation layer and a reinforcement layer are provided between the inner heating wire and the outer heating wire.
5. The single-end-connected double-helix full-line protection multi-temperature zone heating cable according to claim 3, characterized in that: A diode D2 is arranged between the end point b of the inner heating wire and the front point c of the outer heating wire.
6. The single-end-connected double-helix full-line protection multi-temperature zone heating cable according to claim 3, characterized in that: The resistor R1 and the resistor R2 are respectively located on two sides of the temperature fuse TF.