Electric heating structure of overheating protection layer and control system

Abstract

The invention discloses an electric heating structure and a control system of an overheat protection layer, which comprises a base layer, a plurality of heating wires are uniformly distributed in the base layer, wave-shaped conductive structures are electrically connected between two ends of the plurality of heating wires respectively, and detection layers are arranged on two sides of the base layer respectively. Wave detection conductive wires with the same number as the heating wires are evenly distributed on the outer surface of the detection layer, a current detection main circuit is arranged between one ends of the multiple wave detection conductive wires, and high-temperature-resistant wires are arranged between the heating wires, the wave-shaped conductive structure and the base layer for fixation. According to efficient local high temperature detection, the wave detection conductive wires are overlapped in an S-shaped wave shape and correspond to the outer sides of the heating wires, the detection layer is used for blocking electric signals, after the detection layer is melted due to local high temperature, the heating wires make rapid contact with the wave detection conductive wires, and the local abnormal high temperature condition of the electric heating structure can be rapidly and accurately detected.

Description

Technical Field

[0001] The present invention relates to the technical field of electrothermal equipment, and particularly relates to an electrothermal structure and a control system with an overheat protection layer. Background Art

[0002] Electrothermal structures are widely used in various heating equipment and daily necessities, such as electric blankets, heating pads, etc. However, in the actual use process, due to reasons such as local short circuit of the heating wire, poor heat dissipation, and improper use, it is easy to cause local overheating of the electrothermal structure, which may further lead to safety accidents such as fires and burns. The existing overheat protection methods have deficiencies in aspects such as detection accuracy and response speed, and it is difficult to meet the higher requirements for the safety performance of electrothermal structures. Therefore, it is of great significance to develop an overheat protection device that can quickly and accurately detect local high temperature and cut off the power supply in a timely manner.

[0003] Therefore, the existing electrothermal equipment technology field needs to be further improved. Summary of the Invention

[0004] The purpose of the present invention is to provide an electrothermal structure and a control system with an overheat protection layer, which can quickly respond when the electrothermal structure is locally overheated, cut off the power supply, and ensure the use safety.

[0005] To achieve the above purpose, the present invention adopts the following solutions:

[0006] An electrothermal structure with an overheat protection layer includes a base layer, in which multiple heating wires are evenly distributed. Between the two ends of each of the multiple heating wires, a wavy conductive structure is electrically connected. On both sides of the base layer, a detection layer is provided. On the outer surface of the detection layer, wavy detection conductive wires with the same number as the heating wires are evenly distributed. Between one ends of multiple wavy detection conductive wires, a current detection main circuit is provided. Between the intersection of the heating wire, the wavy conductive structure, and the base layer, a high-temperature resistant wire is used for fixation;

[0007] Between the intersection of the wavy detection conductive wire, the current detection main circuit, and the detection layer, a high-temperature resistant wire is also used for fixation;

[0008] It further includes a controller, and the controller is electrically connected to the current detection main circuit and the wavy conductive structure.

[0009] Furthermore, the base layer and the detection layer are made of materials such as non-woven fabric or PVC film;

[0010] The heating wire is made of materials such as carbon fiber, nickel-chromium alloy, chromium-aluminum alloy, tungsten wire, or molybdenum wire.

[0011] Furthermore, the wavy conductive structure includes multiple groups of vertical wavy conductive wire groups;

[0012] The wavy conductive wire group includes two groups of parallel wavy conductive wire groups that are bilaterally symmetrically arranged;

[0013] A plurality of groups of vertically arranged wavy conductive wires and a plurality of horizontally arranged heating wires are arranged in an interlaced manner.

[0014] Furthermore, the two groups of parallel wavy conductive wires are arranged alternately with each other, and the heating wire is arranged between the two groups of parallel wavy conductive wires;

[0015] The parallel wavy conductive wire group includes two wavy conductive wires running parallel to each other in an S-shaped path.

[0016] Furthermore, each of the wave detection conductive wires is in an S-shaped wave shape and overlaps the outer side of a corresponding heating wire and blocks the electrical signal through the detection layer;

[0017] The wave-shaped wave detection conductive wire can increase the detection coverage of local overheating of the heating wire;

[0018] The current detection total circuit includes a plurality of vertical detection metal wires arranged vertically;

[0019] The vertical detection metal wire includes two upper and lower detection conductive metals, which are respectively arranged on the upper and lower surfaces of the wave detection conductive wire.

[0020] Furthermore, the vertical detection metal wire and the wave detection conductive wire are made of copper, aluminum alloy or stainless steel.

[0021] Furthermore, the wave detection conductive wire is made of Wood's alloy material.

[0022] Furthermore, an outer soft frame is provided on each of the wave detection conductive wires for wrapping, and a plurality of circular frames are evenly distributed on the upper cover of the outer soft frame along the transverse direction. The wave detection conductive wire passes through the plurality of circular frames in a wave path, and an outer layer is provided on the outer side of the plurality of outer soft frames, and the outer layer is used to close the plurality of circular frames.

[0023] A control system for an overheat protection layer comprises the following steps:

[0024] S1, the controller is a structure such as a relay or an electronic switch circuit, and the detection end of the controller is electrically connected to the current detection circuit;

[0025] S2. When the user operates improperly, causing the temperature of a certain position of one of the heating wires of the electric heating structure to be too high, the detection layer at the corresponding position melts;

[0026] S3. When the detection layer melts, the heating wire at the corresponding position contacts the wave detection conductive wire and generates current to the wave detection conductive wire;

[0027] S4. The wave-detecting conductive wire transmits the current signal to the controller through the total current detection circuit;

[0028] S5. The controller cuts off the power supply circuit of the wavy conductive structure according to the current signal.

[0029] Furthermore, the following steps are further included.

[0030] S6. The melting point of the wave-detecting conductive wire made of Wood's alloy is between 70°C and 90°C. When the local temperature of the electrothermal structure is too high, the heating wire melts the wave-detecting conductive wire at the corresponding position;

[0031] S7. The solution after the wave-detecting conductive wire at the corresponding position melts covers the corresponding circular frame;

[0032] S8. By increasing the coverage area of the wave-detecting conductive wire, the current signal of the heating wire at the corresponding position can be received more stably, avoiding the situation where the wave-detecting conductive wire arranged in a wave shape and the hollow position of the heating wire arranged in a straight line cannot transmit the electrical signal.

[0033] In summary, the beneficial effects of the present invention compared with the prior art are as follows:

[0034] The present invention solves the deficiencies existing in the prior art in the field of electrothermal equipment. Through the structural settings of the present invention, the following advantages are possessed: efficient local high-temperature detection: by overlapping the wave-detecting conductive wire in an S-shaped wave shape outside the corresponding heating wire and using the detection layer to block the electrical signal, when the detection layer melts due to local high temperature, the heating wire and the wave-detecting conductive wire quickly come into contact, and the abnormal high temperature situation of the local electrothermal structure can be quickly and accurately detected, with a faster response speed compared with the traditional detection method; reliable overheat protection, once local high temperature is detected, the controller can quickly cut off the power supply circuit of the wavy conductive structure and stop the heating wire from heating in time, effectively preventing safety accidents such as fires and scalds caused by local overheating, and greatly improving the safety of the electrothermal structure; the wavy conductive structure adopts multiple groups of staggered wave conductive wire groups. Even if the connection between the heating wire and a certain group of wave conductive wire groups is disconnected, the other groups can still remain energized, ensuring the stability and reliability of the electrothermal structure during normal operation; the cost of the present invention is relatively low. While achieving efficient overheat protection, the production cost is reduced, and it has high market promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 is one of the internal structure schematic diagrams of the present invention;

[0036] Figure 2 is the second internal structure schematic diagram of the present invention;

[0037] Figure 3The third internal structure schematic diagram of the present invention;

[0038] Figure 4 The first three-dimensional diagram of the present invention;

[0039] Figure 5 is Figure 4 The partial enlarged view of part A of ;

[0040] Figure 6 The second three-dimensional diagram of the present invention;

[0041] Figure 7 is Figure 6 The partial enlarged view of part B of ;

[0042] Figure 8 The third internal structure schematic diagram of the present invention;

[0043] Figure 9 is Figure 8 The partial enlarged view of part C of ;

[0044] Figure 10 The fourth internal structure schematic diagram of the present invention. Detailed implementation mode

[0045] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with 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.

[0046] Please refer to Figures 1 - 10 , the present invention provides an electrothermal structure of an overheat protection layer, including a base layer 1, a plurality of heating wires 2 are evenly distributed in the base layer 1, a wavy conductive structure 3 is electrically connected between the two ends of each of the plurality of heating wires 2, detection layers 4 are arranged on both sides of the base layer 1, wavy detection conductive wires 5 with the same number as the number of the heating wires 2 are evenly distributed on the outer surface of the detection layer 4, a current detection main circuit 6 is arranged between one ends of the plurality of wavy detection conductive wires 5, and a high-temperature resistant wire 8 is arranged for fixation between the joints of the heating wire 2, the wavy conductive structure 3 and the base layer 1;

[0047] A high-temperature resistant wire 8 is also arranged for fixation between the joints of the wavy detection conductive wire 5, the current detection main circuit 6 and the detection layer 4;

[0048] It further includes a controller 7, and the controller 7 is electrically connected to the current detection main circuit 6 and the wavy conductive structure 3.

[0049] A plurality of heating wires 2 are evenly distributed in the base layer 1. The heating wires 2 can be made of materials such as carbon fiber, nickel-chromium alloy, chromium-aluminum alloy, tungsten wire or molybdenum wire according to different usage scenarios and requirements.

[0050] At both ends of the plurality of heating wires 2, the wavy conductive structures 3 are electrically connected respectively.

[0051] The specific structure of the wavy conductive structure 3 is as follows:

[0052] It includes multiple groups of vertical wave conductive wire groups 301, and each group of wave conductive wire groups 301 includes two groups of parallel wave conductive wire groups 302 arranged symmetrically. Each group of parallel wave conductive wire groups 302 is composed of two wave conductive wires 303 running parallel to each other in an S-shaped path. Multiple groups of vertically arranged wave conductive wire groups 301 and multiple horizontally arranged heating wires 2 are arranged in an interlaced manner, and the heating wire 2 is arranged between the two groups of parallel wave conductive wire groups 302. The advantage of this design is that when the connection between the heating wire 2 and one group of wave conductive wire groups 301 is disconnected, the other wave conductive wire groups 301 can still remain energized, ensuring the stability and reliability of the entire electric heating structure.

[0053] A detection layer 4 is provided on both sides of the base layer 1, and the detection layer 4 can also be made of materials such as non-woven fabrics or PVC films. On the outer surface of the detection layer 4, the same number of wave detection conductive wires 5 as the number of heating wires 2 are evenly distributed. Each wave detection conductive wire 5 overlaps the outer side of a corresponding heating wire 2 in an S-shaped wave shape, and the electrical signal is blocked by the detection layer 4. The wave detection conductive wire 5 arranged in a wave shape can increase the detection coverage of local overheating of the heating wire 2 and improve the accuracy of the detection.

[0054] A current detection total circuit 6 is arranged between one ends of the plurality of wave detection conductive wires 5. The current detection total circuit 6 includes a plurality of vertical detection metal wires 601 arranged vertically, and the vertical detection metal wire 601 includes two upper and lower detection conductive metals, which are respectively arranged on the upper and lower surfaces of the wave detection conductive wire 5. The vertical detection metal wire 601 and the wave detection conductive wire 5 can be made of copper, aluminum alloy or stainless steel, wherein the wave detection conductive wire 5 is preferably made of Wood's alloy material.

[0055] In order to ensure the stability of the connection between each component, a high temperature resistant wire 8 is provided for fixing between the heating wire 2, the wavy conductive structure 3 and the base layer 1, and between the wave detection conductive wire 5, the current detection circuit 6 and the detection layer 4.

[0056] Finally, the controller 7 is electrically connected to the current detection circuit 6 and the wavy conductive structure 3. The controller 7 can be a relay or an electronic switch circuit, etc., for receiving the signal from the current detection circuit 6 and controlling the power supply circuit of the wavy conductive structure 3 according to the signal.

[0057] Each wave-detecting conductive wire 5 is wrapped with an outer soft frame 100. A plurality of circular frames 200 are evenly distributed along the transverse direction of the cover edge of the outer soft frame 100. The wave-detecting conductive wire 5 passes through the plurality of circular frames 200 in a wave path. An outer layer 300 is arranged outside the plurality of outer soft frames 100, and the outer layer 300 is used to enclose the plurality of circular frames 200.

[0058] A system initialization

[0059] The controller 7 is set to a structure such as a relay or an electronic switch circuit, and the detection end of the controller 7 is electrically connected to the total current detection circuit 6 to complete the initialization setting of the system, so that the entire system is in normal operation

[0060] When the temperature of a certain position of one of the heating wires 2 of the electrothermal structure is too high due to improper user operation or other reasons, the situation of step S2 is entered. At this time, the detection layer 4 at the corresponding position melts due to the temperature rise.

[0061] After the detection layer 4 melts, step S3 is entered. The heating wire 2 and the wave-detecting conductive wire 5 at the corresponding position are in direct contact, and the current of the heating wire 2 is transmitted to the wave-detecting conductive wire 5. Then, according to step S4, the wave-detecting conductive wire 5 transmits the current signal to the controller 7 through the total current detection circuit 6.

[0062] After receiving the current signal, according to step S5, the controller 7 determines that the electrothermal structure has a local overheating situation according to a preset program, and immediately cuts off the power supply circuit of the wavy conductive structure 3, so that the heating wire 2 stops heating, thereby realizing the overheat protection of the electrothermal structure.

[0063] If the wave-detecting conductive wire 5 made of Wood's alloy material is adopted, when the local temperature of the electrothermal structure is too high. Since the melting point of Wood's alloy material is between 70°C and 90°C, according to step S6, the heating wire 2 will melt the wave-detecting conductive wire 5 at the corresponding position. The melted solution of the wave-detecting conductive wire 5 will cover the corresponding circular frame 200, that is, the situation described in step S7. In this way, the coverage area of the wave-detecting conductive wire 5 is increased, and the current signal of the heating wire 2 at the corresponding position is received more stably, avoiding the situation that the wave-detecting conductive wire 5 arranged in a wave shape and the hollow position of the straight heating wire 2 cannot transmit the electrical signal, and further improving the reliability of the overheat protection system.

[0064] In summary, through the above specific implementation manners, the electrothermal structure and control system of the overheat protection layer of the present invention can effectively detect the local high temperature situation of the electrothermal structure and take timely overheat protection measures, ensuring the use safety of the electrothermal equipment.

[0065] The base layer 1 and the detection layer 4 of the present invention are made of materials such as non-woven fabric or PVC film;

[0066] The heating wire 2 is made of materials such as carbon fiber, nickel-chromium alloy, chromium-aluminum alloy, tungsten wire or molybdenum wire.

[0067] The wavy conductive structure 3 of the present invention includes multiple groups of vertical wavy conductive wire groups 301;

[0068] The wavy conductive wire group 301 includes two groups of parallel wavy conductive wire groups 302 arranged symmetrically left and right;

[0069] Multiple groups of vertically arranged wavy conductive wire groups 301 and multiple horizontally arranged heating wires 2 are arranged in an interlaced manner; the purpose is that after the connection between the heating wire 2 and one of the wavy conductive wire groups 301 is disconnected, the other wavy conductive wire groups 301 still remain in an energized state.

[0070] In the present invention, the two groups of parallel wavy conductive wire groups 302 are arranged in an interlaced manner, and the heating wire 2 is arranged between the two groups of parallel wavy conductive wire groups 302;

[0071] The parallel wavy conductive wire group 302 includes two wavy conductive wires 303 that are parallel to each other and walk along an S-shaped path.

[0072] In the present invention, each wavy detection conductive wire 5 is in an S-shaped wave and overlaps the outside of one corresponding heating wire 2 respectively, and the detection layer 4 is used for electrical signal isolation;

[0073] The wavy detection conductive wire 5 arranged in a wave shape can increase the detection coverage range of local overheating of the heating wire 2;

[0074] The total current detection circuit 6 includes multiple vertically arranged vertical detection metal wires 601;

[0075] The vertical detection metal wire 601 includes two upper and lower detection conductive metals, which are respectively arranged on the upper and lower surfaces of the wavy detection conductive wire 5.

[0076] In the present invention, the vertical detection metal wire 601 and the wavy detection conductive wire 5 are made of materials such as copper, aluminum alloy or stainless steel.

[0077] 7. An electrothermal structure of an overheat protection layer according to claim 5, wherein: the wavy detection conductive wire 5 is made of Wood's alloy material.

[0078] On each of the wave-detecting conductive wires 5 of the present invention, an outer soft frame 100 is provided for wrapping. Along the transverse direction of the cover edge of the outer soft frame 100, a plurality of circular frames 200 are evenly distributed. The wave-detecting conductive wire 5 passes through the plurality of circular frames 200 in a wave path. An outer layer 300 is provided outside the plurality of outer soft frames 100, and the outer layer 300 is used to enclose the plurality of circular frames 200.

[0079] A control system for an overheat protection layer includes the following steps.

[0080] S1. The controller 7 is structured as a relay or an electronic switch circuit, etc. The detection end of the controller 7 is electrically connected to the total current detection circuit 6.

[0081] S2. When the user operates improperly, causing the temperature of a certain position of one of the heating wires 2 of the electrothermal structure to be too high, the detection layer 4 at the corresponding position melts.

[0082] S3. After the detection layer 4 melts, the heating wire 2 and the wave-detecting conductive wire 5 at the corresponding position come into contact and generate an electric current to the wave-detecting conductive wire 5.

[0083] S4. The wave-detecting conductive wire 5 transmits the current signal to the controller 7 through the total current detection circuit 6.

[0084] S5. The controller 7 cuts off the power supply circuit of the wavy conductive structure 3 according to the current signal.

[0085] It further includes the following steps.

[0086] S6. The wave-detecting conductive wire 5 made of Wood's alloy material has a melting point between 70°C and 90°C. When the temperature of a local position of the electrothermal structure is too high, the heating wire 2 melts the wave-detecting conductive wire 5 at the corresponding position.

[0087] S7. The solution after the wave-detecting conductive wire 5 at the corresponding position melts covers the corresponding circular frame 200.

[0088] S8. By increasing the coverage area of the wave-detecting conductive wire 5, the current signal of the heating wire 2 at the corresponding position can be received more stably, avoiding the situation where the wave-detecting conductive wire 5 arranged in a wave shape and the hollow position of the straight heating wire 2 cannot transmit the electric signal.

[0089] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and all these changes and improvements fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. An electrothermal structure of an overheat protection layer, characterized in that: It includes a base layer (1), in which a plurality of heating wires (2) are evenly distributed. Between the two ends of each of the plurality of heating wires (2), a wavy conductive structure (3) is electrically connected. On both sides of the base layer (1), a detection layer (4) is provided respectively. On the outer surface of the detection layer (4), wavy detection conductive wires (5) with the same number as the heating wires (2) are evenly distributed. Between one ends of the plurality of wavy detection conductive wires (5), a total current detection circuit (6) is provided. Between the joints of the heating wires (2), the wavy conductive structure (3) and the base layer (1), a high-temperature resistant wire (8) is provided for fixing; Between the joints of the wavy detection conductive wires (5), the total current detection circuit (6) and the detection layer (4), a high-temperature resistant wire (8) is also provided for fixing; It further includes a controller (7), and the controller (7) is electrically connected to the total current detection circuit (6) and the wavy conductive structure (3).

2. The electrothermal structure of an overheat protection layer according to claim 1, characterized in that: The base layer (1) and the detection layer (4) are made of materials such as non-woven fabric or PVC film; The heating wires (2) are made of materials such as carbon fiber, nickel-chromium alloy, chromium-aluminum alloy, tungsten wire or molybdenum wire.

3. The electrothermal structure of an overheat protection layer according to claim 2, characterized in that: The wavy conductive structure (3) includes multiple groups of vertical wavy conductive wire groups (301); Each wavy conductive wire group (301) includes two groups of parallel wavy conductive wire groups (302) arranged symmetrically left and right; The multiple groups of vertically arranged wavy conductive wire groups (301) and the multiple horizontally arranged heating wires (2) are arranged in an interlaced manner.

4. The electrothermal structure of an overheat protection layer according to claim 3, characterized in that: The two groups of parallel wavy conductive wire groups (302) are arranged in an interlaced manner, and the heating wires (2) are arranged between the two groups of parallel wavy conductive wire groups (302); Each parallel wavy conductive wire group (302) includes two wavy conductive wires (303) walking parallel to each other along an S-shaped path.

5. The electrothermal structure of an overheat protection layer according to claim 4, characterized in that: Each wavy detection conductive wire (5) is in an S-shaped wave and overlaps the outside of one corresponding heating wire (2) respectively, and the detection layer (4) is used for electrical signal isolation; The wavy detection conductive wires (5) arranged in a wave shape can increase the detection coverage range of local overheating of the heating wires (2); The total current detection circuit (6) includes multiple vertically arranged vertical detection metal wires (601); Each vertical detection metal wire (601) includes two detection conductive metals, which are respectively arranged on the upper and lower surfaces of the wavy detection conductive wire (5).

6. The electrothermal structure of an overheat protection layer according to claim 5, characterized in that: The vertical detection metal wires (601) and the wavy detection conductive wires (5) are made of materials such as copper, aluminum alloy or stainless steel.

7. The electrothermal structure of an overheat protection layer according to claim 5, characterized in that: The wavy detection conductive wires (5) are made of Wood's alloy material.

8. The electrothermal structure of an overheat protection layer according to claim 7, characterized in that: Each wavy detection conductive wire (5) is wrapped with an outer soft frame (100). Along the transverse direction of the cover edge of the outer soft frame (100), a plurality of circular frames (200) are evenly distributed. The wavy detection conductive wire (5) passes through the plurality of circular frames (200) along a wave path. An outer layer (300) is arranged outside the plurality of outer soft frames (100), and the outer layer (300) is used to enclose the plurality of circular frames (200).

9. A control system for an overheat protection layer, comprising the electrothermal structure of an overheat protection layer according to any one of claims 1-8, characterized in that: It includes the following steps, S1. The controller (7) is structured as a relay or an electronic switch circuit, etc., and the detection terminal of the controller (7) is electrically connected to the total current detection circuit (6); S2. When the user operates improperly, causing the temperature at a certain position of one of the heating wires (2) of the electrothermal structure to be too high, the detection layer (4) at the corresponding position melts; S3. After the detection layer (4) melts, the heating wire (2) at the corresponding position contacts the wave detection conductive wire (5) and generates an electric current to the wave detection conductive wire (5); S4. The wave detection conductive wire (5) transmits the current signal to the controller (7) through the total current detection circuit (6); S5. The controller (7) cuts off the power supply circuit of the wavy conductive structure (3) according to the current signal.

10. The control system of an overheat protection layer according to claim 9, characterized in that : It also includes the following steps, S6. The wave detection conductive wire (5) made of Wood's alloy has a melting point between 70°C and 90°C. When the temperature at a local position of the electrothermal structure is too high, the heating wire (2) melts the wave detection conductive wire (5) at the corresponding position; S7. The solution after the wave detection conductive wire (5) at the corresponding position melts covers the corresponding circular frame (200); S8. By increasing the coverage area of the wave detection conductive wire (5), the current signal of the heating wire (2) at the corresponding position is received more stably, avoiding the situation where the hollow positions of the wave detection conductive wire (5) arranged in a wave shape and the heating wire (2) arranged in a straight line cannot transmit the electric signal.

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