Multi-voltage input clothing heating sheet based on multi-tap structure

Abstract

The application relates to the technical field of wearable electric heating sheets, and discloses a multi-voltage input clothing heating sheet based on a multi-tap structure, which comprises a clothing heating sheet body, multiple groups of heating elements which are independent and can be selectively connected in series, a multi-tap lead wire, a multi-voltage input plug and a control circuit module. According to the application, one end of the multi-tap lead wire is electrically connected with different connection nodes of the multiple groups of heating elements in one-to-one correspondence, and the other end is adaptively connected with the multi-voltage input plug, so that different voltages drive different heating elements to be connected in series, meanwhile, the control circuit module guarantees stable power supply, prevents reverse connection of the power supply and filters out power supply clutter, and through feedback of a state indicating element, the on-off of the power supply loop is controlled, so that the clothing heating sheet can be adapted to mainstream power banks without a special power supply, the heating sheet power and the heating area are automatically matched to prevent temperature out-of-control scalding and improve the wearing comfort, and the power supply compatibility, the use safety and the overall use experience of the clothing heating sheet are improved.

Description

Technical Field

[0001] This application relates to the field of wearable electric heating element technology, specifically a multi-voltage input clothing heating element based on a multi-tap structure. Background Technology

[0002] As people's pursuit of quality of life continues to improve, smart clothing is gradually entering the public eye. Among them, clothing with heating functions is receiving increasing attention. As a core component of such clothing, the performance of the heating element directly affects the user experience. Traditional heating elements often need to be adapted to specific voltages, and when faced with multiple voltage inputs, problems such as unstable heating and component damage easily occur, limiting the product's versatility (compatibility) and safety. This design aims to develop a clothing heating element that automatically adapts and adjusts power under multiple voltage inputs, enabling it to work stably under different voltages, automatically adjusting power to ensure heating effect and safety performance. Traditional multi-voltage input heating uses PWM switching duty cycle to regulate temperature, with a voltage recognition module detecting the input voltage. The PWM duty cycle is low for low voltage inputs and high for high voltage inputs, but this has many drawbacks in actual use: ① When the switching power transistor burns out and short-circuits, or the voltage recognition module malfunctions, there is a risk of temperature runaway leading to overheating; ② When the input voltage is high, the resistance of the heating element is mismatched with the voltage, resulting in a large instantaneous power (…). Generally, currents exceeding 3A or higher are incompatible with the 2A or 3A discharge current standard of commercially available power banks, requiring a high-power portable power supply (such as a portable charger) to operate; ③ When using high voltage input, although temperature can be adjusted via PWM, the heating area does not increase, leading to heat accumulation, causing discomfort on the skin, and even the risk of low-temperature burns. Therefore, developing a clothing heating element that can automatically adapt to various voltage inputs and match the corresponding power is of significant practical importance. Utility Model Content

[0003] The purpose of this application is to provide a multi-voltage input garment heating element based on a multi-tap structure to solve the technical problems mentioned in the background art.

[0004] To achieve the above objectives, this application discloses the following technical solution: a multi-voltage input garment heating element based on a multi-tap structure, comprising: The heating element itself in clothing; Multiple sets of heating elements are arranged independently and selectively in series within the garment heating element body; Multi-tap leads, one end of which is electrically connected to different connection nodes of the multiple sets of heating elements, so as to lead out the access terminals of different combinations of heating elements; A multi-voltage input plug, the number of which corresponds to the number of leads of the multi-tap wire, and each multi-voltage input plug is electrically connected to the other end of the corresponding multi-tap wire; The control circuit module includes a main control chip U1, a voltage regulator U2, a rectifier diode D2, a status indicator, current limiting resistors R1, R2, R3, and R4, a filter capacitor C1, a filter capacitor C3, and a control switch SW1. The control circuit module is electrically connected to at least one of the multi-tap leads through the current-limiting resistor R3, the current-limiting resistor R4, and the rectifier diode D2. The voltage regulator U2 is electrically connected to the power supply terminal of the main control chip U1. The filter capacitor C1 is connected in parallel between the power supply terminal of the main control chip U1 and ground. The filter capacitor C3 is associated with the input terminal of the voltage regulator U2. The status indicator element is electrically connected to the signal output terminal of the main control chip U1 through the current-limiting resistors R3 and R4. The control switch SW1 is connected in series in the power supply circuit between the multi-tap leads and the heating element. The current-limiting resistors R1 and R2 are respectively electrically connected to the corresponding pins of the main control chip U1.

[0005] Preferably, the plurality of heating elements are at least one of carbon fiber heating wire, composite heating wire or carbon nanotube heating film, and the plurality of heating elements are evenly arranged along the plane of the clothing heating plate body.

[0006] Preferably, each of the two adjacent sets of heating elements is provided with a multi-tap lead.

[0007] Preferably, the multi-voltage input plug includes at least three of the following: USB-A type plug, DC4017 type plug, DC5521 type plug, and Type-C type plug.

[0008] Preferably, the rectifier diode D2 is a unidirectional diode, wherein the anode of the rectifier diode D2 is electrically connected to the multi-tap lead, and the cathode is electrically connected to the current-limiting resistor R3.

[0009] Preferably, the status indicator element includes a red light-emitting diode LED_R, a green light-emitting diode LED_G, and a blue light-emitting diode LED_B. The red light-emitting diode LED_R is electrically connected to the signal output terminal of the main control chip U1 through the current-limiting resistor R2, the green light-emitting diode LED_G is electrically connected to the signal output terminal of the main control chip U1 through the current-limiting resistor R3, and the blue light-emitting diode LED_B is electrically connected to the signal output terminal of the main control chip U1 through the current-limiting resistor R4.

[0010] Beneficial effects: The multi-taper structure-based multi-voltage input clothing heating element of this application, through the design of multi-taper leads and multi-voltage input plugs, achieves the effect of not requiring a dedicated power bank for power supply and can be directly adapted to mainstream power bank adapters on the market; by designing different combinations of heating elements connected in series for different voltage inputs (fewer heating elements working when the voltage input is low, and more heating elements connected in series when the voltage input is high), the power of the heating element and the heating area are automatically matched, avoiding the risk of temperature runaway and low-temperature burns; by designing multiple heating elements evenly distributed on the heating base fabric, the heating area is expanded when the voltage input is high, avoiding heat concentration and improving the comfort of wearing the garment; by setting the voltage regulator U2, rectifier diode D2, filter capacitor and control switch SW1 in the control circuit module, the reverse connection of the power supply is prevented, power supply noise is filtered out, the circuit is ensured to operate stably, and the product life is extended; in addition, by eliminating the design of the PWM adjustment module and voltage recognition module in the traditional multi-voltage heating scheme, the overall structure of the heating element is simplified, and the manufacturing process difficulty and production cost are reduced. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 A schematic diagram of the circuit composition of a multi-taper structure-based multi-voltage input garment heating element provided in an embodiment of this application; Figure 2 This is a schematic diagram of the circuit connection of a multi-taper structure-based multi-voltage input garment heating element provided in an embodiment of this application. Detailed Implementation

[0013] The technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0014] In this document, the term "comprising" is intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0015] This embodiment provides a method such as Figure 1 The multi-taper structure-based multi-voltage input garment heating element shown includes the garment heating element body and three sets of heating elements (such as...). Figure 1 and 2 Heating wire 1, heating wire 2, heating wire 3 (shown), and four multi-tap leads (e.g.) Figure 2 The corresponding nodes shown are ①②③④), and three sets of multi-voltage input plugs (such as...). Figure 1 The USB-A5V, DC4017-7.4V, and DC5521-12V modules and control circuit modules are shown.

[0016] Multiple heating elements are independently and selectively connected in series within the garment heating element body. One end of a multi-tap lead is electrically connected to a different connection node of each heating element to provide access points for different heating element combinations. The number of multi-voltage input plugs corresponds to the number of multi-tap lead outlets, and each multi-voltage input plug is electrically connected to the other end of its corresponding multi-tap lead. The control circuit module includes a main control chip U1 (model FT60F211-RB), a voltage regulator U2 (model HT7550), a rectifier diode D2 (model 1N5819WS), status indicator elements (LED_R, LED_G, LED_B), current-limiting resistors R1, R2, R3, and R4, filter capacitors C1 and C3, and a control switch SW1. The control circuit module is electrically connected to at least one of the multi-tap leads through current-limiting resistors R3 and R4 and rectifier diode D2. The voltage regulator U2 is electrically connected to the power supply terminal (VDD) of the main control chip U1. The filter capacitor C1 is connected in parallel between the power supply terminal (VDD) and ground (VSS) of the main control chip U1. The filter capacitor C3 is associated with the input terminal of the voltage regulator U2. The status indicator element is electrically connected to the signal output terminal of the main control chip U1 through current-limiting resistors R3 and R4. The control switch SW1 is connected in series in the power supply circuit between the multi-tap leads and the heating element. The current-limiting resistors R1 and R2 are electrically connected to the corresponding pins of the main control chip U1, respectively.

[0017] When external power supplies of different voltage standards are connected through the corresponding multi-voltage input plugs, the voltage signal is transmitted to the corresponding heating element combination through the multi-tap leads, so that multiple heating elements can work in series in different numbers according to different input voltages, thereby automatically matching the heating power of the clothing heating element with the input voltage. The control circuit module monitors the power supply status through the main control chip U1 and feeds back the working status through the status indicator element, and controls the on / off of the power supply circuit through the control switch SW1.

[0018] In this embodiment, the multiple heating elements are at least one of carbon fiber heating wire, composite heating wire or carbon nanotube heating film. All heating elements are disposed on the heating base cloth and are evenly arranged along the plane of the heating base cloth to ensure stable current and uniform heating area when connected in series.

[0019] In this embodiment, a multi-tap lead is provided at the connection nodes of two adjacent groups of heating elements (i.e., ①②, ②③, ③④), so that when any number of heating elements are connected in series, the heating area can be evenly distributed in the body of the clothing heating pad. When the voltage input is low, some heating elements work, and when the voltage input is high, more heating elements work in series.

[0020] In this embodiment, the multi-voltage input plug includes at least three of the following: USB-A type plug, DC4017 type plug, DC5521 type plug and Type-C type plug, to adapt to the interface types of mainstream external power supplies (power banks, power adapters) on the market, without the need for a dedicated power supply.

[0021] In this embodiment, the rectifier diode D2 is a unidirectional diode, wherein the anode of the rectifier diode D2 is electrically connected to the multi-tap lead, and the cathode is electrically connected to the current-limiting resistor R3, so as to prevent damage to the main control chip U1, the voltage regulator U2 and multiple heat-generating components when the external power supply is reversed.

[0022] In this embodiment, the status indicator element includes a red LED_R, a green LED_G, and a blue LED_B. The three LEDs correspond to the operating status under different voltage inputs. The red LED_R is electrically connected to the signal output terminal of the main control chip U1 through a current-limiting resistor R2, the green LED_G is electrically connected to the signal output terminal of the main control chip U1 through a current-limiting resistor R3, and the blue LED_B is electrically connected to the signal output terminal of the main control chip U1 through a current-limiting resistor R4.

[0023] Feasiblely, the specific composition and parameters of the heating element used in this embodiment are as follows: heating wire 1 (resistance 2.5Ω), heating wire 2 (resistance 1.2Ω), and heating wire 3 (resistance 2.3Ω), all made of carbon fiber heating wire. Based on this, the specific connection relationship is as follows: the three sets of heating wires are connected in series from end to end: one end of heating wire 1 is the common end (corresponding to tap ①), the other end of heating wire 1 is connected to one end of heating wire 2 (corresponding to tap ②), the other end of heating wire 2 is connected to one end of heating wire 3 (corresponding to tap ③), and the other end of heating wire 3 is the end (corresponding to tap ④).

[0024] Feasiblely, this embodiment uses four multi-tap leads, which are electrically connected to the heating wire connection nodes ①②③④ one by one. The lead material is heat-resistant copper core wire. The connection relationship is as follows: one end of the lead is soldered to the corresponding node, and the other end is electrically connected to the multi-voltage input plug or the control circuit module respectively; wherein tap ① is also connected in series with the control switch SW1 of the control circuit module as a common power supply terminal.

[0025] Feasibly, this embodiment uses a multi-voltage input plug including a USB-A type plug (compatible with commercially available 5V / 2A power bank output), a DC4017 type plug (compatible with commercially available 7.4V / 2A power bank output), and a DC5521 type plug (compatible with commercially available 12V / 2A power bank output). Specifically, the USB-A type plug is only electrically connected to tap ②, the DC4017 type plug is only electrically connected to tap ③, and the DC5521 type plug is only electrically connected to tap ④; the negative terminal of each plug is electrically connected to the ground terminal (VSS) of the garment heating element body.

[0026] Feasible configuration: In this embodiment, the current-limiting resistors R1, R2, R3, and R4 have a resistance of 100KΩ, 470Ω, 470Ω, and 470Ω respectively; the filter capacitors C1 and C3 have a capacitance of 100nF and 4.7μF respectively. Based on this, the specific connection relationship of the control circuit module is as follows: the anode of the rectifier diode D2 is connected to the tap ① lead, and the cathode is connected to the current-limiting resistor R3; the input terminal of the voltage regulator U2 is connected to the tap ① lead, and the output terminal is connected to the power supply terminal (VDD) of the main control chip U1; the filter capacitor C1 is connected in parallel between the VDD of U1 and ground (VSS), and C3 is connected in parallel between the input terminal of U2 and ground; LED_R, LED_G, and LED_B are electrically connected to different signal output terminals of U1 through R2, R3, and R4 respectively; the control switch SW1 is connected in series between the tap ① lead and the common terminal of the heating wire 1 to control the on / off state of the power supply circuit.

[0027] Based on the above, the working process of the multi-taper structure-based multi-voltage input garment heating element in this embodiment is as follows: (1) 5V voltage input (USB-A plug connection) When an external 5V / 2A power bank is connected via a USB-A plug, the voltage signal forms a power supply circuit through tap ② and tap ①, with only heating wire 1 (2.5Ω) operating independently. According to the formula... loop current Corresponding power At this time, the heating area is only the coverage area of ​​heating wire 1, and the average temperature of the heating area is about 65℃, which meets the requirements of low voltage, small area, and good heat preservation. The current of 2A is compatible with the output standard of conventional power banks on the market.

[0028] (2) 7.4V voltage input (DC4017 plug) When an external 7.4V / 2A power bank is connected via a DC4017 plug, the voltage signal forms a power supply circuit through tap ③ and tap ①. Heating wire 1 (2.5Ω) and heating wire 2 (1.2Ω) work in series, with a total resistance of [value missing]. According to the formula loop current Corresponding power At this point, the heating area is the coverage area of ​​heating wire 1+2 (larger than when inputting 5V), and the average temperature of the heating area remains at about 65℃, achieving the effect of medium voltage, medium area, and warmer feeling, while avoiding heat concentration.

[0029] (3) 12V voltage input (DC5521 plug connection) When an external 12V / 2A power bank is connected via a DC5521 plug, the voltage signal forms a power supply circuit through tap ④ and tap ①. Heating wires 1 (2.5Ω), 2 (1.2Ω), and 3 (2.3Ω) work in series, with a total resistance of [value missing]. According to the formula loop current Corresponding power At this time, the heating area is the full coverage area of ​​the three heating wires (maximum area), and the average temperature of the heating area remains stable at about 65℃, which meets the requirements of high voltage, large area and comfortable heat preservation, and there is no risk of low temperature burns.

[0030] Meanwhile, the control circuit module works in real time: the main control chip U1 monitors the power supply voltage and controls the LED_R, LED_G, and LED_B to respond to the working status of 5V, 7.4V, and 12V input respectively; the rectifier diode D2 prevents the components from being damaged by reverse connection of the power supply, the filter capacitors C1 and C3 filter out power supply noise, and the voltage regulator U2 ensures the stability of the power supply to U1, thus ensuring the reliable operation of the circuit as a whole.

[0031] Furthermore, the fabrication process of the multi-taper structure-based multi-voltage input garment heating element in this embodiment is as follows: (1) Preparation of heating base fabric: Select a flexible and heat-resistant textile fabric as the heating base fabric, cut it according to the size of the heating area of ​​the clothing (such as the size of the back and abdomen area of ​​the electric heating clothing), and leave the heating wire fixing groove on the surface of the base fabric; (2) Fixing and connecting heating wires: Arrange three sets of carbon fiber heating wires (resistance values ​​of 2.5Ω, 1.2Ω and 2.3Ω respectively) evenly along the base fabric groove and fix them with high temperature resistant adhesive; weld them end to end in the order of heating wire 1-heating wire 2-heating wire 3 to form a series structure, and reserve welding points at the welding nodes (①②③④); (3) Multi-tap lead wires: Take four heat-resistant copper core wires and weld them to nodes ①②③④ respectively. The length of the lead wires is designed according to the clothing wearing requirements (leaving a margin of 10-15cm); wrap the lead wires with an insulating sleeve to prevent short circuits. (4) Assembly of control circuit module: Solder the main control chip U1, voltage regulator U2, rectifier diode D2, current limiting resistor, filter capacitor and control switch SW1 on the PCB board; solder LED_R, LED_G and LED_B to the reserved indicator area on the PCB board to ensure that the light is visible; (5) Connecting the plug to the circuit: Solder the positive terminal of the USB-A plug to the tap ② lead, the positive terminal of the DC4017 plug to the tap ③ lead, and the positive terminal of the DC5521 plug to the tap ④ lead; Solder the negative terminal of all plugs and the ground (VSS) of the control circuit module to the common ground wire and connect it to the ground terminal of the clothing heating element body. (6) Testing and packaging: Connect 5V, 7.4V and 12V power banks respectively, test the current (must be stable at 2A), power and temperature (65℃±5℃) under each voltage to ensure that the heating area matches the voltage; after the test is passed, package the control circuit module in the waterproof shell, sew the edge of the heating base fabric to the corresponding area of ​​the clothing, and complete the overall assembly.

[0032] In the embodiments provided in this application, it should be understood that the embodiments described herein can be implemented in hardware, software, firmware, middleware, code, or any suitable combination thereof. For hardware implementation, the processor may be implemented in one or more of the following: application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field-programmable gate arrays (FPGAs), processors, controllers, microcontrollers, microprocessors, other electronic units designed to implement the functions described herein, or combinations thereof. For software implementation, some or all of the processes of the embodiments may be performed by a computer program instructing the associated hardware. During implementation, the program may be stored in a computer-readable storage medium or transmitted as one or more instructions or code on a computer-readable storage medium. Computer-readable storage media include computer storage media and communication media, wherein communication media include any medium that facilitates the transmission of a computer program from one place to another. Storage media may be any available medium accessible to a computer. Computer-readable storage media may include, but are not limited to, RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage media or other magnetic storage devices, or any other medium capable of carrying or storing desired program code having the form of instructions or data structures and accessible to a computer.

[0033] Finally, it should be noted that the above description is only a preferred embodiment of this application and is not intended to limit this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A multi-taper structure-based multi-voltage input garment heating element, characterized in that, include: The heating element itself in clothing; Multiple sets of heating elements are arranged independently and selectively in series within the garment heating element body; Multi-tap leads, one end of which is electrically connected to different connection nodes of the multiple sets of heating elements, so as to lead out the access terminals of different combinations of heating elements; A multi-voltage input plug, the number of which corresponds to the number of leads of the multi-tap wire, and each multi-voltage input plug is electrically connected to the other end of the corresponding multi-tap wire; The control circuit module includes a main control chip U1, a voltage regulator U2, a rectifier diode D2, a status indicator, current limiting resistors R1, R2, R3, and R4, a filter capacitor C1, a filter capacitor C3, and a control switch SW1. The control circuit module is electrically connected to at least one of the multi-tap leads through the current-limiting resistor R3, the current-limiting resistor R4, and the rectifier diode D2. The voltage regulator U2 is electrically connected to the power supply terminal of the main control chip U1. The filter capacitor C1 is connected in parallel between the power supply terminal of the main control chip U1 and ground. The filter capacitor C3 is associated with the input terminal of the voltage regulator U2. The status indicator element is electrically connected to the signal output terminal of the main control chip U1 through the current-limiting resistors R3 and R4. The control switch SW1 is connected in series in the power supply circuit between the multi-tap leads and the heating element. The current-limiting resistors R1 and R2 are respectively electrically connected to the corresponding pins of the main control chip U1.

2. The multi-taper structure-based multi-voltage input garment heating element according to claim 1, characterized in that, The multiple sets of heating elements are at least one of carbon fiber heating wire, composite heating wire, or carbon nanotube heating film, and the multiple sets of heating elements are evenly arranged along the plane of the clothing heating plate body.

3. The multi-taper structure-based multi-voltage input garment heating element according to claim 1, characterized in that, Each of the two adjacent sets of heating elements is provided with a multi-tap lead.

4. The multi-taper structure-based multi-voltage input garment heating element according to claim 1, characterized in that, The multi-voltage input plug includes at least three of the following: USB-A type plug, DC4017 type plug, DC5521 type plug, and Type-C type plug.

5. The multi-taper structure-based multi-voltage input garment heating element according to claim 1, characterized in that, The rectifier diode D2 is a unidirectional diode, wherein the anode of the rectifier diode D2 is electrically connected to the multi-tap lead, and the cathode is electrically connected to the current-limiting resistor R3.

6. The multi-taper structure-based multi-voltage input garment heating element according to claim 1, characterized in that, The status indicator element includes a red light-emitting diode LED_R, a green light-emitting diode LED_G, and a blue light-emitting diode LED_B. The red light-emitting diode LED_R is electrically connected to the signal output terminal of the main control chip U1 through the current-limiting resistor R2. The green light-emitting diode LED_G is electrically connected to the signal output terminal of the main control chip U1 through the current-limiting resistor R3. The blue light-emitting diode LED_B is electrically connected to the signal output terminal of the main control chip U1 through the current-limiting resistor R4.

Images