Flexible heater with protection

Abstract

The utility model discloses a flexible heater with protection, which comprises a flexible body, a flexible heating film is arranged in the flexible body, a power supply module and a control module are arranged on the flexible body, at least three side edges of the flexible heating body are provided with state detectors, and the state detectors are connected with the power supply module and the control module. The state detector comprises an infrared transmitter and an infrared receiver which are matched to transmit and receive infrared signals, the power supply module is used for supplying power to the flexible heating film, the control module and the state detector, and the control module is connected with the state detector. According to the utility model, the unfolding state of the flexible heater can be detected in the use process, and the use safety is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric heating, in particular to a flexible heater with protection. Background Art

[0002] The flexible heater uses a flexible heating film as the heating unit, which can be easily folded and rolled up, making it easy to carry and store. At the same time, its flexible nature also allows it to fit on uneven surfaces. The flexible heater can provide a convenient and comfortable heating experience at home, in the office or outdoors.

[0003] When in use, the flexible heater transfers heat energy by emitting far-infrared rays. The heating film has a faster heating effect, and the heating temperature is much higher than existing heating products such as electric heating wires. However, when the flexible heater works in a folded or curled state, heat will accumulate and it is prone to high-temperature damage and even spontaneous combustion accidents.

[0004] Therefore, when the flexible heating film is working, it needs to be ensured that it is in an expanded state. However, since there is no mechanism to detect the state on the existing flexible heater, the current shape of the flexible heater cannot be obtained in real time during the power-on process, which greatly increases the safety risk. Summary of the Invention

[0005] The technical problem to be solved by the utility model is to provide a flexible heater with protection, which can detect the unfolding state of the flexible heater during use and improve the safety of use.

[0006] In order to solve the above technical problems, the utility model provides a protective flexible heater, including a flexible body, a flexible heating film is arranged in the flexible body, a power supply module and a control module are arranged on the flexible body, and a status detector is arranged on at least three sides of the flexible heating body. The status detector includes an infrared transmitter and an infrared receiver for transmitting and receiving infrared signals. The power supply module is used to power the flexible heating film, the control module and the status detector, and the control module is connected to the status detector.

[0007] Furthermore, the control module is arranged in the middle of one side of the flexible heating body, and status detectors are provided on the sides of the flexible heating body corresponding to both sides of the control module, and the infrared transmitter and infrared receiver of the status detector are respectively arranged at the ends of the corresponding sides and on the control module.

[0008] Furthermore, the infrared transmitters and infrared receivers of the status detectors on the remaining sides are respectively arranged at the ends of the corresponding sides.

[0009] Furthermore, the power supply module is arranged on the other side of the flexible heating body opposite to the control module.

[0010] Furthermore, a focusing cup is provided on the light emitting end of the infrared emitter, and the focusing cup is used to limit the light emitting cone angle of the infrared emitter to 10-90 degrees.

[0011] Furthermore, the light cone angle is 30-60 degrees.

[0012] Furthermore, the MCU in the control module controls the infrared transmitter to transmit infrared signals through a 38kHz pulse frequency, and the infrared receiver is used to receive the 38kHz infrared signal.

[0013] Furthermore, the control module is also connected to a number of thermistors, which are used to detect the temperature of the flexible heating film and the controller.

[0014] Furthermore, the flexible heating film includes a plurality of heating elements arranged in parallel.

[0015] Beneficial effects of the utility model:

[0016] The infrared transmitter and the infrared receiver can cooperate to perform detection, and can detect and judge the flatness of a single side of the flexible body. In addition, the status detectors set on at least three sides can effectively judge the unfolding state of the flexible body, effectively ensuring the safety of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the layout of the status detector at one corner of the flexible body of the utility model;

[0019] Figure 3 It is a protection principle diagram of the present utility model. DETAILED DESCRIPTION

[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it. However, the embodiments are not intended to limit the present invention.

[0021] Reference Figures 1 to 3As shown, an embodiment of a protective flexible heater of the present invention is used for protection when the flexible heater is in an open state without a fixed support structure, comprising a flexible body 1, a flexible heating film 2 being arranged in the flexible body, a power supply module 3 and a control module 4 being arranged on the flexible body, and a state detector being arranged on at least three sides of the flexible heating body, the state detector comprising an infrared transmitter 5 and an infrared receiver 6 for cooperating in sending and receiving infrared signals, that is, the transmitter and the receiver, which are an infrared diode and a receiving diode, the power supply module being used to power the flexible heating film, the control module and the state detector, the control module being connected to the state detector, the MCU in the control module controlling the infrared transmitter of the state detector to transmit infrared rays at a specific frequency, and the infrared receiver being used to receive the infrared signal emitted by the infrared transmitter and to process and judge it through the MCU.

[0022] Here, the flexible heating element is provided with status detectors on three sides, that is, it is ensured that there are diodes with detection status at all four corners. The status detector determines the unfolded state of the flexible body by whether there is a signal. When one corner of the flexible body is in a folded state, the transmitter and receiver at the corresponding position of this corner cannot form a signal loop, that is, the corresponding status detector cannot detect the signal and is judged to be in a non-operational state. When the flexible body is in an unfolded state, the status detectors on the three sides can all detect the signal, that is, the transmitter and receiver can all form a signal loop, and are judged to be in a workable state. When the flexible body is in a curled state, there will be multiple status detectors that cannot form a signal loop, that is, it is also judged to be in a non-operational state. In the above-mentioned status detection, as long as one status detector cannot form a signal loop, that is, the flexible heater does not work, and all status detectors can form a signal loop, the flexible heater will work, thereby ensuring the protection effect of the flexible heater only when it works in the unfolded state, greatly improving the safety of use.

[0023] In the working environment, the flexible heating film continuously emits infrared rays when it heats up. The infrared receiver must avoid interference from this infrared ray. Therefore, the infrared receiver is selected to analyze and output the corresponding square wave pulse signal only for the 38kHz carrier frequency. It can effectively filter out light wave signals of other frequencies, that is, it does not convert signals of other frequencies, greatly improving the anti-interference ability. Specifically, the MCU in the control module controls the infrared transmitter to transmit infrared signals through the 38kHz pulse frequency, and the infrared receiver is used to receive the 38kHz infrared signal. In the specific process, the MCU intermittently sends a 38kHz pulse voltage signal to drive the infrared transmitter. When there is no obstruction (if there is an obstruction, there may be an object attached to the flexible body, posing a safety hazard) or the flexible body is not curled or folded, the infrared receiver will receive a 38KHz square wave signal and convert it into a square wave signal consistent with the emission pattern and feed it back to the MCU. When the MCU detects this signal, it determines that there is no object obstruction or the flexible body is not curled or folded. If the MCU sends the signal several times and does not receive the return signal output by the infrared receiver, it means that the flexible body is curled or folded; or if it receives a return signal inconsistent with the sent signal pattern, it is determined that there is an obstruction. By judging the presence or absence of the signal and the correctness of the signal, it is determined whether the flexible body is in a working state or environment.

[0024] A focusing cup is provided on the light emitting end of the infrared emitter, which is used to limit the light emitting cone angle of the infrared emitter to 10-90 degrees, preferably to 30-60 degrees, so as to ensure that the flexible body can work normally even when it is uneven or slightly bent due to environmental factors after being unfolded.

[0025] The above-mentioned infrared emitter and infrared receiver are preferably arranged on the ends of the corresponding side edges to ensure that the status of the entire side edge can be detected. The above-mentioned control module can be arranged in the middle of one side edge of the flexible heating body, and the side edge is preferably a long side. Status detectors are provided on the sides of the flexible heating body corresponding to both sides of the control module, and the infrared emitter and infrared receiver of the status detector are respectively arranged at the ends of the corresponding side edges and on the control module to divide the long side edge into two sections and perform independent detection, thereby reducing the problem of poor accuracy caused by the long detection distance. The infrared emitters and infrared receivers of the status detectors on the remaining sides are respectively arranged at the ends of the corresponding sides to ensure that the entire side edge can be detected.

[0026] Specifically, after the above configuration, a state detector is used, namely four infrared emitters and four infrared receivers, which are detected in pairs. The two infrared emitters or two infrared receivers located at the corners can be integrated into one module, effectively reducing the overall volume and making the infrared emitters and infrared receivers closer to the corners. Figure 3As shown, located at the corner, the two status detectors can design the infrared emitter in a module structure, that is, this corner emits infrared rays in two directions, one toward the infrared receiver in the status detector, and the other toward the corner on the other side away from the infrared emitter.

[0027] Correspondingly, the power supply module is located on the other side of the flexible heating body, opposite the control module. This side does not require a status detector; instead, the status of that side can be determined by detecting three sides, reducing manufacturing costs. Furthermore, the power supply module and the control module are separated by a design that prevents heat generated by the power supply module from interfering with the control module during operation, ensuring stable heat dissipation and extending service life.

[0028] The flexible heating film comprises several parallel-connected heating elements 7, which are carbon nano-far-infrared heating films. During use, they can operate in separate blocks, improving user comfort and increasing the operating temperature range of the flexible heater. The control module is also connected to several thermistors 8, which are used to detect the temperature of the flexible heating film and the controller.

[0029] Furthermore, the above embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art based on the present invention are within the protection scope of the present invention.

Claims

1. A flexible heater with protection, characterized in that: It includes a flexible body, a flexible heating film is arranged in the flexible body, a power supply module and a control module are arranged on the flexible body, and a status detector is arranged on at least three sides of the flexible heating body. The status detector includes an infrared transmitter and an infrared receiver for transmitting and receiving infrared signals. The power supply module is used to supply power to the flexible heating film, the control module and the status detector, and the control module is connected to the status detector.

2. The protective flexible heater according to claim 1, characterized in that: The control module is arranged in the middle of one side of the flexible heating body, and status detectors are arranged on the sides of the flexible heating body corresponding to both sides of the control module, and the infrared transmitter and infrared receiver of the status detector are respectively arranged on the ends of the corresponding sides and the control module.

3. The protective flexible heater according to claim 2, characterized in that: The infrared transmitters and infrared receivers of the status detectors on the remaining sides are respectively arranged at the ends of the corresponding sides.

4. The protective flexible heater according to claim 2, characterized in that: The power supply module is arranged on the other side of the flexible heating body opposite to the control module.

5. The protective flexible heater according to claim 1, characterized in that: A focusing cup is provided on the light emitting end of the infrared emitter, and the focusing cup is used to limit the light emitting cone angle of the infrared emitter to 10-90 degrees.

6. The protective flexible heater according to claim 5, characterized in that: The light emitting cone angle is 30-60 degrees.

7. The protective flexible heater according to claim 1, characterized in that: The MCU in the control module controls the infrared transmitter to transmit infrared signals through a 38kHz pulse frequency, and the infrared receiver is used to receive the 38kHz infrared signals.

8. The protective flexible heater according to claim 1, characterized in that: The control module is also connected to a plurality of thermistors, which are used to detect the temperature of the flexible heating film and the controller.

9. The protective flexible heater according to claim 1, characterized in that: The flexible heating film includes a plurality of heating elements arranged in parallel.

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