Multi-layer protection full-effect safe electric blanket
By employing a multi-layered structure in the electric blanket, including a polyimide film insulation layer, a flame-retardant needle-punched nonwoven fireproof layer, and a glass fiber support layer, the problems of easy aging of the insulation layer and current leakage in traditional electric blankets are solved, achieving a dual improvement in safety and comfort.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-21
- Publication Date
- 2026-04-03
AI Technical Summary
Traditional electric blankets have low temperature resistance and are prone to aging, which causes the heating wire to come into direct contact with the outside environment, posing a risk of electric shock. Furthermore, the heating wire may puncture the insulation layer and cause current leakage when the blanket is turned over or folded.
It adopts a double-layer polyimide film insulation layer, an outer flame-retardant needle-punched non-woven fabric or aramid fiber fire-retardant layer, an inner glass fiber reinforced cloth support layer and a nano-coating waterproof layer, forming a multi-layer structure, combined with a wear-resistant cotton and linen fiber layer, to ensure insulation, fireproofing, waterproofing and wear resistance.
It achieves comprehensive safety protection, including uniform heating, waterproofing and insulation, fire resistance and wear resistance, avoiding current leakage and fire risks, and improving user comfort and safety.
Smart Images
Figure CN224070116U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electric blanket technology, specifically a multi-layer protective all-around safety electric blanket. Background Technology
[0002] Heated blankets are a common appliance for heating in winter, and are widely used in homes, medical care, and outdoor settings due to their convenience and comfort.
[0003] Traditional electric blankets often use PVC film or ordinary polyester fiber materials for insulation, which generally have a temperature resistance of less than 100°C. They are prone to aging and embrittlement in high-temperature environments, causing the heating wire to come into direct contact with the outside environment and posing a risk of electric shock. For example, in existing technologies, the heating wire is usually directly wound on a non-woven fabric base and isolated by only a single thin layer of insulation cloth. When the user turns over or folds the electric blanket, the heating wire may puncture the insulation layer due to compression, causing current leakage. Utility Model Content
[0004] (a) Technical problems to be solved
[0005] To address the shortcomings of existing technologies, this utility model provides a multi-layer protective all-effect safety electric blanket, which solves the problem that in existing technologies, the heating wire is usually directly wound on a non-woven fabric base and isolated only by a single thin insulating cloth. When the user turns over or folds the electric blanket, the heating wire may be squeezed and punctured by the insulation layer, causing current leakage.
[0006] (II) Technical Solution
[0007] To achieve the above objectives, this utility model provides the following technical solution: a multi-layer protective all-effect safety electric heating blanket, comprising two insulating layers;
[0008] The two insulating layers have mounting grooves on their opposite sides, and heating wires are installed on the inner walls of the two mounting grooves. The two insulating layers are bonded together with adhesive. Both insulating layers are made of polyimide film and are used to wrap the heating wires.
[0009] The upper and lower surfaces of the two insulation layers are provided with fire-retardant layers, which wrap the two insulation layers together. The fire-retardant layers are made of flame-retardant needle-punched nonwoven fabric or aramid fiber, which can quickly carbonize and block combustion when exposed to open flame.
[0010] Preferably, a wear-resistant layer is provided on the lower surface of the fireproof and flame-retardant layer described below, and the wear-resistant layer is made of alternating cotton and linen fibers;
[0011] A support layer is provided on the upper surface of the fireproof and flame-retardant layer.
[0012] Preferably, the support layer wraps around two fireproof and flame-retardant layers, and the support layer is made of glass fiber reinforced cloth.
[0013] Preferably, the upper surface of the support layer is provided with a waterproof layer, which is used to wrap the support layer and the fireproof and flame-retardant layer.
[0014] Preferably, the upper surface of the waterproof layer is provided with a skin-friendly heat transfer layer, which is made of acrylic fiber.
[0015] Preferably, a first connecting wire is fixedly connected to the right end of the heating wire, and a control switch is fixedly installed at the end of the first connecting wire away from the heating wire.
[0016] Preferably, a second connecting wire is fixedly installed on the control switch.
[0017] Preferably, a plug is fixedly connected to the end of the second connecting wire away from the control switch.
[0018] (III) Beneficial Effects
[0019] Compared with the prior art, this utility model provides a multi-layered protective all-around safety electric blanket, which has the following beneficial effects:
[0020] 1. This multi-layered protective all-around safety electric blanket achieves all-around safety protection through the synergistic effect of multiple materials, including uniform heat conduction, waterproof insulation, fire resistance, and wear resistance, meeting users' dual needs for comfort and safety.
[0021] 2. This multi-layered protective all-effect safety electric blanket features a glass fiber reinforced fabric support layer with high flexural modulus characteristics, which suppresses local bulging of the heating wires, ensuring even heat distribution and avoiding the localized overheating problem caused by the accumulation of heating wires in traditional electric blankets. Attached Figure Description
[0022] Figure 1 This is a schematic diagram of the overall structure of the multi-layer protective all-effect safety electric blanket of this utility model;
[0023] Figure 2 This is a schematic diagram of the overall lower surface of the electric blanket of this utility model;
[0024] Figure 3 This is a schematic diagram of the upper surface of the insulating layer of this utility model;
[0025] Figure 4 This is a schematic diagram of the shape of the heating wire of this utility model;
[0026] Figure 5 for Figure 2 Enlarged diagram of point A in the middle.
[0027] In the diagram: 1. Skin-friendly heat transfer layer; 2. First connecting wire; 3. Control switch; 4. Second connecting wire; 5. Plug; 6. Wear-resistant layer; 7. Mounting groove; 8. Insulation layer; 9. Heating wire; 10. Support layer; 11. Fireproof and flame-retardant layer; 12. Waterproof layer. Detailed Implementation
[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0029] Please see Figure 1-5 This utility model provides a new technical solution: a multi-layer protective all-effect safety electric heating blanket, including two insulating layers 8, each with an installation groove 7 on its opposite surface, and a heating wire 9 installed on the inner wall of the two installation grooves 7. The two insulating layers 8 are bonded together with adhesive. Both insulating layers 8 are made of polyimide film, used to wrap the heating wire 9, with a temperature resistance of over 150℃ to prevent current leakage. The upper and lower surfaces of the two insulating layers 8 are provided with fire-retardant layers 11, which wrap the two insulating layers 8 together. The fire-retardant layers 11 are made of flame-retardant needle-punched non-woven fabric or aramid fiber, which can quickly carbonize and block combustion when exposed to open flame.
[0030] Furthermore, a wear-resistant layer 6 is provided on the lower surface of the fire-retardant layer 11. The wear-resistant layer 6 is made of alternating cotton and linen fibers, which has strong anti-slip properties, preventing it from sliding randomly on the bed or chair and improving the stability of the electric blanket during use. A support layer 10 is provided on the upper surface of the fire-retardant layer 11.
[0031] Furthermore, the support layer 10 wraps around the two fireproof and flame-retardant layers 11. The support layer 10 is made of glass fiber reinforced cloth with a glass fiber content of ≥30% and a flexural modulus of >500 MPa, which can suppress local bulging of the heating wire.
[0032] Furthermore, a waterproof layer 12 is provided on the upper surface of the support layer 10. The waterproof layer 12 is used to wrap the support layer 10 and the fireproof and flame-retardant layer 11. The waterproof layer 12 is made of nano-coating or TPU film to achieve an IPX4 waterproof rating, so that even if liquid seeps in, short circuits can be avoided.
[0033] Furthermore, a skin-friendly heat transfer layer 1 is provided on the upper surface of the waterproof layer 12, and the material of the skin-friendly heat transfer layer 1 is acrylic fiber.
[0034] Furthermore, a first connecting wire 2 is fixedly connected to the right end of the heating wire 9, and a control switch 3 is fixedly installed at the end of the first connecting wire 2 away from the heating wire 9.
[0035] Furthermore, a second connecting wire 4 is fixedly installed on the control switch 3.
[0036] Furthermore, a plug 5 is fixedly connected to the end of the second connecting wire 4 away from the control switch 3.
[0037] Furthermore, when using this multi-layer protective all-effect safety electric blanket, first insert the plug 5 into the power socket, select the appropriate temperature setting (low temperature, medium temperature, high temperature) through the control switch 3, and the electronic components in the control switch 3 adjust the current according to the set setting. The current is conducted to the heating wire 9 through the first connecting wire 2.
[0038] Among them, the heating wire 9 starts to generate heat and radiates heat to the surroundings. The acrylic fibers of the skin-friendly heat transfer layer 1 quickly absorb the heat and evenly conduct it to the human body contact surface. Due to its soft and skin-friendly properties, it ensures the user's comfort.
[0039] During the heat transfer process, the nano-coating or TPU film of the waterproof layer 12 prevents liquid penetration. Even if liquid is accidentally splashed, the IPX4 waterproof rating can prevent short circuit risks and ensure electrical safety.
[0040] Among them, the glass fiber reinforced cloth of the support layer 10, with its high flexural modulus, suppresses local bulging of the heating wire 9, so that the heat is evenly distributed and avoids the problem of local overheating caused by the accumulation of heating wires in traditional electric blankets.
[0041] Among them, the flame-retardant needle-punched nonwoven fabric or aramid fiber of the fireproof and flame-retardant layer 11 constantly monitors the temperature. If the local temperature rises abnormally due to a fault, the material will quickly carbonize upon contact with an open flame to form a barrier layer, blocking the spread of combustion. Combined with the polyimide film of the insulation layer 8 (temperature resistant above 150℃), it provides double protection against current leakage and fire risk.
[0042] Among them, the alternating cotton and linen fiber weave structure of the wear-resistant layer 6 generates friction with the bed sheet or chair surface, preventing the electric blanket from sliding around and maintaining a stable position, especially when turning over or moving, thus improving ease of use;
[0043] When the set temperature is reached, the temperature control element in the control switch 3 automatically adjusts the current to keep the heating wire 9 at a constant temperature, thus avoiding material aging or energy waste caused by continuous high temperature.
[0044] After use, the control switch 3 is turned off and the plug 5 is unplugged. The materials of each protective layer can still maintain structural stability in the absence of current. They are not easily deformed or damaged after long-term use. Through the synergistic effect of multiple materials, the electric blanket achieves all-around safety protection with uniform heat conduction, waterproof insulation, fire resistance and wear resistance, meeting the user's dual needs for comfort and safety.
[0045] Structural Description:
[0046] Skin-friendly heat transfer layer 1
[0047] Location: The top layer (upper surface) of the entire electric blanket.
[0048] Material: Acrylic fiber.
[0049] Function:
[0050] Uniform heat conduction: It quickly absorbs the heat generated by the heating wire 9 and conducts it evenly to the human body contact surface, avoiding local temperature differences.
[0051] Comfortable to the touch: Its soft and skin-friendly properties enhance the user's comfort when in contact with it, making it suitable for direct contact with the skin or clothing.
[0052] First connecting line 2
[0053] Location: The heating wire 9 is led out from the right end and connected to the control switch 3.
[0054] Material: Conductive metal wire (usually copper core), with an outer insulating layer.
[0055] Function: It transmits the current adjusted by the control switch 3 to the heating wire 9, and is a key connecting component for circuit conduction.
[0056] Control switch 3
[0057] Location: Outside the electric blanket, connected to the internal circuitry via a connecting wire.
[0058] Structure: Built-in electronic components (such as temperature control chip and gear adjustment module).
[0059] Function:
[0060] Temperature adjustment: Offers low, medium, and high temperature settings, and controls the heating power of heating wire 9 by adjusting the current.
[0061] Temperature control: Built-in temperature control element automatically adjusts the current when the temperature reaches the set value to maintain a constant temperature and avoid overheating and energy waste.
[0062] Second connecting line 4
[0063] Location: The other end of control switch 3 is led out and connected to plug 5.
[0064] Material: Same as the first connecting wire 2, conductive metal wire + insulation layer.
[0065] Function: To transmit the current from the power socket to the control switch 3, thus completing the overall circuit conduction.
[0066] Plug 5)
[0067] Location: The very end of the electric blanket circuit, used to plug into a power outlet.
[0068] Material: Conductive pins (copper or alloy) + insulating shell (such as PC material).
[0069] Function: Connects to an external power source to provide electrical power input for the entire electric blanket.
[0070] Wear-resistant layer 6
[0071] Location: The lower surface of the fireproof and flame-retardant layer 11 (i.e., the bottom of the electric blanket).
[0072] Material: Cotton and linen fibers are woven alternately.
[0073] Function:
[0074] Anti-slip and stable: Through the friction between cotton and linen fibers and contact surfaces such as bed sheets and chair surfaces, the electric blanket is prevented from sliding around during use, especially when turning over or moving, it maintains a fixed position.
[0075] Wear-resistant protection: Enhances the wear resistance of the bottom, extending the service life of the electric blanket.
[0076] Mounting slot 7
[0077] Location: The opposite sides (i.e., the inner sides) of the two insulating layers 8 are grooved.
[0078] Material: integrally molded with insulation layer 8 (polyimide film).
[0079] Function: To fix the position of the heating wire 9, ensure its even distribution, prevent the heating wire 9 from shifting or piling up during use, and provide physical support and initial insulation protection for the heating wire 9.
[0080] Insulation layer 8
[0081] Location: The core layer of the electric blanket, with two insulating layers 8 bonded together, and a heating wire 9 wrapped in the middle.
[0082] Material: Polyimide film (temperature resistance ≥150℃).
[0083] Function:
[0084] Electrical insulation: prevents current leakage from heating wire 9 and avoids the risk of electric shock.
[0085] Structural support: As a base layer, it fixes the position of the heating wire 9 and is bonded to the fireproof and flame-retardant layer 11 to form a composite protective structure.
[0086] High temperature resistance: The temperature resistance reaches over 150℃, which is suitable for the long-term high temperature working environment of heating wire 9 and avoids material aging and damage.
[0087] Support layer 10
[0088] Location: On the upper surface of the fireproof and flame-retardant layer 11, two fireproof and flame-retardant layers 11 are wrapped around it.
[0089] Material: Glass fiber reinforced cloth (glass fiber content ≥30%, flexural modulus >500MPa).
[0090] Function:
[0091] Deformation resistance: With its high flexural modulus, it suppresses local bulging of the heating wire 9 caused by thermal expansion and contraction or external pressure, ensuring uniform heat distribution and avoiding the problem of local overheating in traditional electric blankets.
[0092] Structural reinforcement: Enhances the overall rigidity of the electric blanket and prevents the multi-layered materials from shifting or delaminating during use.
[0093] Fireproof and flame-retardant layer 11
[0094] Location: The upper and lower surfaces of the two insulating layers 8, covering the insulating layers 8 and the heating wire 9.
[0095] Material: Flame-retardant needle-punched nonwoven fabric or aramid fiber.
[0096] Function:
[0097] Fire barrier: When exposed to open flame, it quickly carbonizes to form a barrier layer, blocking the spread of combustion and preventing fire risks.
[0098] Temperature monitoring: As a temperature-sensitive layer, when the local temperature rises abnormally (such as when the heating wire 9 fails and short-circuits), the material suppresses the fire in time through carbonization reaction. Combined with the temperature resistance characteristics of the insulation layer 8, it achieves double fire protection.
[0099] Waterproof layer 12
[0100] Location: The upper surface of the support layer 10, covering the support layer 10 and the fireproof and flame-retardant layer 11.
[0101] Material: Nano-coating or TPU film, achieving IPX4 waterproof rating (splash-proof).
[0102] Function:
[0103] Waterproof and insulating: Prevents liquids from penetrating into the internal circuitry (such as from an accidentally spilled cup of water). Even if liquid does seep in, the waterproof structure prevents short circuits and ensures electrical safety.
[0104] Moisture protection: Prevents moisture intrusion during long-term use, extending the service life of internal materials.
[0105] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A multi-layered protective all-in-one safety electric blanket characterized in that, The utility model relates to an electric heating blanket, including: Two insulation layers (8); The opposite surfaces of two insulation layers (8) are provided with installation grooves (7), and the inner walls of two installation grooves (7) are provided with heating wires (9), two insulation layers (8) are adhered together by glue, and the material of two insulation layers (8) is polyimide film and is used for wrapping heating wire (9); Wherein, the upper and lower surfaces of two insulation layers (8) are provided with fireproof flame-retardant layers (11), and the fireproof flame-retardant layer (11) wraps two insulation layers (8) together, and the material of fireproof flame-retardant layer (11) is flame-retardant needle-punched non-woven fabric or aramid fiber, which can carbonize rapidly and block combustion when encountering open fire.
2. A multi-layer protective full-effect safety electric blanket according to claim 1, characterized in that: The lower surface of the lower fireproof flame-retardant layer (11) is provided with a wear-resistant layer (6) made of cotton and hemp fibers alternately woven. Wherein, the upper surface of the upper fireproof flame-retardant layer (11) is provided with a support layer (10).
3. A multi-layer protective full-effect safety electric blanket according to claim 2, characterized in that: The support layer (10) wraps two fireproof flame-retardant layers (11), and the material of the support layer (10) is glass fiber reinforced cloth.
4. A multi-layer protective full-effect safety electric blanket according to claim 2, characterized in that: The upper surface of the support layer (10) is provided with a waterproof layer (12) for wrapping the support layer (10) and the fireproof flame-retardant layer (11).
5. A multi-layer protective full-effect safety electric blanket according to claim 4, characterized in that: The upper surface of the waterproof layer (12) is provided with a skin-friendly heat transfer layer (1) made of acrylic fiber.
6. A multi-layer protective full-effect safety electric blanket according to claim 1, characterized in that: The right end of the heating wire (9) is fixedly connected with a first connecting line (2), and the end of the first connecting line (2) away from the heating wire (9) is fixedly installed with a control switch (3).
7. A multi-layer protective full-effect safety electric blanket according to claim 6, characterized in that: The control switch (3) is fixedly installed with a second connecting line (4).
8. A multi-layer protective full-effect safety electric blanket according to claim 7, characterized in that: The end of the second connecting line (4) away from the control switch (3) is fixedly connected with a plug (5).