Novel human body part heating device

Abstract

The invention discloses a novel human body part heating device, and relates to the field of heating, in the device, when the voltage is uncertain, a voltage module is called to detect and determine a voltage duty ratio signal; when the voltage is determined, a voltage duty ratio signal is a fixed value; the temperature module detects a device temperature signal and determines a temperature on-off signal; the single-chip microcomputer circuit is used for transmitting a temperature on-off signal to the driving module when all voltage duty ratio signals are set to be zero and the voltage module does not exist. When the voltage duty ratio signals are not all set to be zero and the voltage module exists, the adjusted voltage duty ratio signals are transmitted to the driving module to be amplified and then transmitted to the heating module to conduct constant-temperature and controllable-power heating on the device. The single-chip microcomputer circuit unidirectionally outputs a display screen of the driving device, or the single-chip microcomputer circuit bidirectionally outputs and drives a vehicle instrument display screen to carry out bidirectional communication. Controllable power heating can be achieved, and therefore the problem that current changes greatly along with voltage is solved.

Description

Technical Field

[0001] This application relates to the field of heating, and in particular to a novel heating device for human body parts. Background Technology

[0002] Currently, vehicles using gasoline, and those using new energy or hybrid power, operate at 12V-200V or higher. These vehicles utilize the vehicle's power supply to heat specific parts of the body, hence the term "body part heating devices." These devices include: heated handles, heated handle covers, heated steering wheels, heated steering wheel covers, heated armrest covers, etc.; heated hips, heated seats, heated seat cushions, etc.; heated heads, heated hats, heated helmets, etc.; heated feet (such as calves and thighs), heated floor mats, heated shoes, heated leg straps, heated clothing, etc.; and heated back, chest, waist, and abdomen, heated clothing, heated vests, heated bras, heated belts, heated belly bands, etc. The resistance of these body part heating devices is a fixed value (with slight fluctuations). At 12V, the resistance is generally around 8Ω, and the current is 1.5A. If used with a working voltage of 40V to 200V, the current would be around 5A to 25A, consuming 200 to 5000W of power, which is absolutely unacceptable. If the resistance of the body heating device were changed to 80Ω, the heating output at 12V would only be 1.8W, which is too low for practical use. At 40V, it would be 0.5A, which is 40*0.5=20W, and at 200V, it would be 200 / 80=2.5A, consuming 2.5A*200V=500W of power, which is also unacceptable. According to Euclid's law, when the resistance remains constant, as the voltage increases significantly, the current increases significantly, and the power increase is even greater, leading to uncontrollable power fluctuations. Uncontrollable high power puts a great strain on batteries and generators, poses serious safety hazards to wiring and components, and could even cause a fire.

[0003] When the target customer for a heating device is specific, such as custom-producing a device with a specified voltage for a new energy vehicle manufacturer, or when the target customer is uncertain, such as supplying an unknown future customer to the parts market, the input voltage of the heating device may be definite for some devices, while for others it may be uncertain. Manufacturers can only produce heating devices with various voltage specifications to meet customer needs. Too many voltage models require significant capital and manpower from the manufacturer; too many voltage models also make it difficult for distributors to stock up; and the various voltage models already produced may not match the customer's requirements, resulting in a significant waste of resources, and some voltage models may even be unsellable. Producing only 12-volt heating devices, while simpler, leads to increased interference between electrical appliances, increases the load on the 12-volt voltage regulator, making it prone to damage, and some vehicle models require an additional 12-volt regulator. Furthermore, 12-volt heating is slower, among other problems. Therefore, the production of heating devices with ultra-wide voltage ranges and manually adjustable power is urgently needed, and market demand is high.

[0004] Furthermore, currently used heating devices all have integrated displays, requiring a separate installation location for the screen. Installing it on the front of the heating device is inconvenient in winter when people cover the entire handlebars with large, insulated gloves, making it impossible to see the temperature display. It also takes up valuable handlebar space. Installing it elsewhere on the vehicle increases installation difficulty, takes up space, and affects aesthetics, which is strongly opposed by aftermarket manufacturers and customers. Summary of the Invention

[0005] The purpose of this application is to provide a novel heating device for human body parts, which enables heating power to fluctuate within a small range even when the voltage changes significantly. The power level can be set manually, thereby achieving controllable power heating and solving the problem of current and power changing significantly with voltage. The controllable power eliminates the impact on batteries and generators, as well as the impact on circuits and components, and avoids the risk of fire.

[0006] To achieve the above objectives, this application provides the following solution:

[0007] This application provides a novel human body part heating device, including a voltage module, a temperature module, a drive module, and a heating module; wherein, the voltage module and the temperature module are implemented by a single-chip microcomputer circuit.

[0008] The voltage module is used in the following situations: During production, thousands of random target customers have vehicles with various voltage models, such as 12V, 48V, 60V, 144V, etc. The device is installed on a random vehicle, so the device's input voltage is also random. Although the vehicle to which the device is used is random, once it is installed on a specific vehicle, the device's input voltage is determined, rather than fluctuating wildly over a wide range, although small fluctuations are allowed. Therefore, for this random input voltage, the device calls the voltage module to detect the device's input voltage and determines the duty cycle signal for different voltage ranges based on the obtained input voltage signal. If the voltage is below or above a certain range, the duty cycle can be set to zero for overvoltage or undervoltage protection, or a certain voltage range can be set to zero to disable it.

[0009] When the voltage of the target customer can be specifically determined during production, the proportional value of the corresponding voltage duty cycle signal is set to a fixed value that is not zero based on the input voltage of the device.

[0010] When the voltage of the target customer can be specifically determined during production, the voltage duty cycle signal is set to a zero value based on the input voltage of the device. In this case, the voltage module can be canceled.

[0011] The microcontroller circuit is used to: when the voltage of the target customer is random and uncertain, call the voltage module detection device to input the voltage, and determine the voltage duty cycle signal based on the obtained input voltage signal; when the voltage of the target customer is not random but certain, the voltage duty cycle signal is a fixed value.

[0012] The temperature module is used to: detect the device temperature signal, perform analog-to-digital conversion on the device temperature signal to obtain a digital temperature signal, and determine a temperature on / off signal by comparing the digital temperature signal with a preset temperature threshold.

[0013] The microcontroller circuit is also used to: when the voltage duty cycle signal is set to all zeros and the voltage module is not present, directly transmit the temperature on / off signal to the drive module; when the voltage duty cycle signal is not set to all zeros and the voltage module is present, indirectly control the voltage duty cycle signal according to the temperature on / off signal to obtain an adjusted voltage duty cycle signal, and then transmit the adjusted voltage duty cycle signal to the drive module;

[0014] The drive module is used to: amplify the received signal and then transmit it to the heating module to perform constant temperature and controllable power heating on the device;

[0015] The microcontroller circuit can either drive the device's built-in display screen in one direction or drive the vehicle's instrument display screen in two directions for bidirectional communication. During bidirectional communication, the vehicle's instrument display screen can also communicate bidirectionally with a wireless device. During bidirectional communication, the vehicle's instrument display screen or the wireless device can display and operate various parameters of the device. The microcontroller circuit can simultaneously drive both the built-in display screen and the vehicle's instrument display screen.

[0016] According to the specific embodiments provided in this application, this application achieves the following technical effects: Through the cooperation of multiple modules and the determination of different duty cycles, a closed-loop regulation is formed to achieve constant temperature and controllable power heating. When the input voltage of the device increases, the microcontroller circuit, after internal program processing, reduces the duty cycle signal output by the microcontroller circuit to the drive module, shortens the current conduction time of the drive module, reduces the average current passing through the device, and maintains the average heating power of the device within a controllable range. The current or power of each voltage segment can be set with different duty cycles during programming as needed. When the heating temperature of the device increases, the microcontroller circuit, after internal program processing, reduces the conduction time of the signal directly or indirectly output by the microcontroller circuit to the drive module, shortens the current conduction time of the drive module, reduces the heating time through the device, and lowers the temperature of the device, thereby maintaining it within a constant temperature range.

[0017] With the device described in this application, the heating current and power will not change drastically with a significant increase in input voltage. Instead, they will remain within a small range, such as around 30W-60W, as the voltage increases significantly. This allows for controllable adjustment of the heating power, thus preventing impact on the power supply system, safety of the circuits and components, and fire hazards.

[0018] This application relates to a heating device for producing ultra-wide voltage ranges. Manufacturers do not need to invest a lot of capital and manpower, and distributors can easily stock up. The ultra-wide voltage range heating devices produced can fully meet customers' needs for voltage models, without causing a lot of waste of manpower and financial resources, and without causing certain models to be stockpiled and unsold.

[0019] This application is installed on a vehicle, utilizing the vehicle's existing instrument panel display and in-vehicle wireless communication. This eliminates the need to install a separate display on the vehicle, saving materials, space, and aesthetics. It also enables two-way communication between the vehicle and the system, allowing the display and operation of heating device information such as temperature, voltage, and current on the vehicle's instrument panel display or on electronic devices such as mobile phones. The vehicle referred to in this application is: a vehicle driven by human, artificial, or animal power, possessing at least one wheel, and of various types, capable of carrying people or goods. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments 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.

[0021] Figure 1 This is a schematic diagram of a novel human body part heating device according to one embodiment of this application.

[0022] Figure 2 This is a circuit diagram of a novel human body part heating device according to one embodiment of this application. Detailed Implementation

[0023] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0024] To make the objectives, features and advantages of this application more apparent and understandable, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] In one exemplary embodiment, such as Figure 1 As shown, a novel human body part heating device is provided, including a voltage module, a flame-retardant module, a temperature module, a drive module, a display screen, an operation module, and a heating module; the voltage module and the temperature module are functionally implemented by a microcontroller circuit. The microcontroller circuit includes at least one microcontroller chip, and both the voltage module and the temperature module are connected to the microcontroller chip.

[0026] In practical applications, both the voltage module and the heating module are connected to the device input voltage, which is connected to the vehicle's operating power supply, which is 6V-200V.

[0027] The microcontroller circuit is used to: when the voltage of the target customer is random and uncertain, call the voltage module detection device to input the voltage, and determine the voltage duty cycle signal based on the obtained input voltage signal; when the voltage of the target customer is not random but certain, the input voltage of the detection device can be canceled or not, and the ratio value of the voltage duty cycle signal can be set to a fixed value.

[0028] Specifically, when the device input voltage is an uncertain value between 6V and 200V, the input voltage signal is converted from analog to digital to obtain a digital voltage signal. Based on the comparison between this digital voltage signal and a preset voltage threshold, different voltage duty cycle signals are output. Different preset voltage thresholds determine different output voltage duty cycle signals. These voltage duty cycle signals are amplified by the drive module to obtain average currents of varying magnitudes, which heat the device. The preset voltage threshold is programmed and burned into the microcontroller.

[0029] When the device's input voltage fluctuates within a small range of 6V to 200V, there's no need to monitor the input voltage or compare it to a preset voltage threshold. The voltage module's output duty cycle signal can be set to zero or a fixed value. This fixed duty cycle signal is amplified by the drive module to obtain a small-fluctuation average current that heats the device. When the voltage duty cycle is set to zero and the voltage module is not used, the temperature module directly controls the drive module, and the voltage module can be disabled.

[0030] In practical applications, voltage modules use resistor voltage division or current sampling methods to obtain the detected voltage signal. For example... Figure 2 As shown, the voltage module includes a first resistor R1 and a second resistor R2; one end of the first resistor R1 is connected to the working voltage, and the other end of the first resistor R1 is connected to one end of the second resistor R2 and the microcontroller chip respectively; the other end of the second resistor R2 is grounded.

[0031] In addition, the first resistor R1 is 620 kΩ and the second resistor R2 is 20 kΩ.

[0032] The temperature module is used to: detect the device temperature signal, perform analog-to-digital conversion on the device temperature signal to obtain a digital temperature signal, and determine a temperature on / off signal by comparing the digital temperature signal with a preset temperature threshold. Figure 2 As shown, the temperature module includes a third resistor R3, a thermistor MF, and a first capacitor C1. One end of the third resistor R3 is connected to +5V, and the other end of the third resistor R3 is connected to one end of the thermistor MF, one end of the first capacitor C1, and the microcontroller chip. The other ends of the thermistor MF and the first capacitor C1 are both grounded. The third resistor R3 has a resistance of 2 kΩ to 50 kΩ. The preset temperature threshold is programmed and burned into the microcontroller.

[0033] The microcontroller circuit is also used to: when the voltage duty cycle signal is set to zero and the voltage module is omitted, directly transmit the temperature on / off signal to the drive module; when the voltage duty cycle signal is not set to zero and the voltage module is not omitted, indirectly control the voltage duty cycle signal according to the temperature on / off signal to obtain an adjusted voltage duty cycle signal, and then transmit the adjusted voltage duty cycle signal to the drive module.

[0034] The microcontroller chips in the microcontroller circuit include STC8G1K08, STC8H1K17, etc., and their programs can be burned and downloaded through the P3.1 interface and P3.0 interface.

[0035] In a practical application, in order to protect the battery and public safety, when a person leaves and the device is left unattended, the microcontroller circuit will automatically enter standby or shutdown state after a preset time or upon sensing the departure of the person, thereby protecting the battery and preventing safety hazards caused by continuous heating.

[0036] The driving module is used to: amplify the received signal and then transmit it to the heating module to perform constant temperature and controllable power heating on the device; specifically, as shown in the example... Figure 2 As shown, the driving module includes a field-effect transistor (FET) G, a fourth resistor R4, and a fifth resistor R5. The source of the FET G is grounded, the drain of the FET G is connected to the flame-retardant module, and the gate of the FET G is connected to one end of the fourth resistor R4 and one end of the fifth resistor R5. The other end of the fourth resistor R4 is connected to the microcontroller circuit, and the other end of the fifth resistor R5 is grounded. The fourth resistor R4 is 3 kΩ, the fifth resistor R5 is 100 kΩ, and the FET G is a CMP32N20P.

[0037] In practical applications, the flame-retardant module is positioned between the drive module and the heating module. This module is used to fuse and cut off power when the device temperature exceeds a preset temperature threshold (e.g., a preset temperature value between 90 and 190 degrees Celsius, the specific value depending on actual needs), thus providing flame-retardant protection. In other words, when the microcontroller circuit's temperature control function experiences thermal runaway, causing the device to overheat and even reach a risk of burns or combustion, the module fuses and cuts off power to provide flame-retardant protection.

[0038] like Figure 2 As shown, the heating module is made of resistive or semiconductor material, specifically SB. The flame-retardant module is made of alloy material, specifically RB.

[0039] In a specific application, the microcontroller circuit can drive the device's built-in display screen in one direction, or it can drive the vehicle's instrument panel display screen in two directions for bidirectional communication. During bidirectional communication, the vehicle's instrument panel display screen can also communicate bidirectionally with wireless devices, such as a mobile phone and the vehicle's instrument panel display screen for display and operation. During bidirectional communication, the vehicle's instrument panel display screen or the wireless device can display and operate various parameters of the device. The microcontroller circuit can simultaneously drive both its built-in display screen and the vehicle's instrument panel display screen.

[0040] like Figure 2 As shown, the STC8H1K17 chip's P3.3, P3.4, P3.5, P3.6, and P3.7 interfaces establish a one-way communication connection with the display screen, displaying statuses such as temperature, overvoltage / undervoltage, and temperature rise on its built-in display. Five current-limiting resistors are also provided to control the display screen's brightness.

[0041] like Figure 2 As shown, the P3.0, P3.1, and P1.7 interfaces of the STC8H1K17 chip connect to the MAX485 communication interface. The A and B ends of the MAX485 communication interface connect to the A and B ends of the vehicle's instrument panel display, enabling bidirectional communication between the device and the display. Both the device and the instrument panel display require programming to be burned and downloaded to achieve bidirectional communication. In bidirectional communication mode, the vehicle's instrument panel display is equipped with various physical buttons, touch buttons, sensors, and input / output ports. It can also connect to wireless electronic devices such as mobile phones for bidirectional communication with the vehicle's infotainment system. Furthermore, the display can show various vehicle operating statuses, including vehicle speed, battery voltage and charge, throttle status, engine speed, mileage, undervoltage and overvoltage conditions, operating current, temperature, and fault conditions. Bidirectional communication eliminates the waste of materials associated with installing a separate display, saving both materials and space by utilizing the existing instrument panel display.

[0042] Specifically, for bidirectional communication, a bidirectional communication circuit MAX485 is added between the microcontroller circuit and the display screen. The A and B terminals of the MAX485 are connected to the common differential communication port of the display screen. The R0 terminal of the MAX485 is connected to the P3.0 interface of the microcontroller circuit, and the D1 terminal of the MAX485 is connected to the P3.1 interface of the microcontroller circuit. The DE terminal is connected to the P1.7 interface of the microcontroller circuit. When the display screen sends instructions to the microcontroller circuit through the bidirectional communication circuit MAX485, the microcontroller circuit receives the instructions and executes the relevant operations. At the same time, the microcontroller circuit also sends a confirmation message of receiving the instructions back to the display screen through MAX485.

[0043] In one specific application, the operation module is connected to the microcontroller circuit, and the operation module is used to perform power on / off operations, temperature settings (high / low), and over / under voltage settings. The operation module can be omitted as needed.

[0044] like Figure 2 As shown, the operation module includes a first button K1, a second button K2, a second capacitor C2, and a third capacitor C3; the first button K1 and the second button K2 are both connected to the microcontroller circuit; one end of the second capacitor C2 is connected to the first button K1, and the other end of the second capacitor C2 is grounded; one end of the third capacitor C3 is connected to the second button K2, and the other end of the third capacitor C3 is grounded.

[0045] In one specific application, the device further includes a voltage regulator circuit; the voltage regulator circuit is used to regulate the operating voltage to 5V to power the microcontroller circuit. For example... Figure 2 As shown, the voltage regulator circuit includes a first semiconductor transistor B1, a second semiconductor transistor B2, a sixth resistor R6, a fourth capacitor C4, a fifth capacitor C5, and a diode D. The collector of the first semiconductor transistor B1 is connected to the collector of the second semiconductor transistor B2 and then connected to the operating voltage. The emitter of the first semiconductor transistor B1 is connected to the base of the second semiconductor transistor B2. The emitter of the second semiconductor transistor B2 is connected to one end of the fourth capacitor C4 and the microcontroller circuit, respectively. The other end of the fourth capacitor C4 is grounded. The base of the first semiconductor transistor B1 is connected to one end of the sixth resistor R6, one end of the diode D, and one end of the fifth capacitor C5, respectively. The other end of the sixth resistor R6 is connected to the operating voltage, and the other ends of the diode D and the fifth capacitor C5 are grounded.

[0046] Because the operating voltage ranges from 6V to 200V, the voltage design of this device can be simplified from various options to a universal voltage type, saving materials and labor. This also allows manufacturers and distributors to better manage production and inventory. Furthermore, utilizing the vehicle's instrument panel display not only saves materials but also saves space for installation, resulting in a more aesthetically pleasing design. Both of these points align with the principles of a resource-saving society, conserving materials and promoting environmental protection.

[0047] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0048] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. Furthermore, those skilled in the art will recognize that, based on the ideas of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A novel heating device for human body parts, characterized in that, The device includes a voltage module, a temperature module, a drive module, and a heating module; wherein the voltage module and the temperature module are configured with corresponding functions by a microcontroller circuit. The microcontroller circuit is used to: when the voltage of the target customer is random and uncertain, call the voltage module detection device to input the voltage, and determine the voltage duty cycle signal based on the obtained input voltage signal; when the voltage of the target customer is not random but certain, the voltage duty cycle signal is a fixed value. The temperature module is used to: detect the device temperature signal, perform analog-to-digital conversion on the device temperature signal to obtain a digital temperature signal, and determine a temperature on / off signal by comparing the digital temperature signal with a preset temperature threshold. The microcontroller circuit is also used to: when the voltage duty cycle signal is set to all zeros and the voltage module is not present, directly transmit the temperature on / off signal to the drive module; when the voltage duty cycle signal is not set to all zeros and the voltage module is present, indirectly control the voltage duty cycle signal according to the temperature on / off signal to obtain an adjusted voltage duty cycle signal, and then transmit the adjusted voltage duty cycle signal to the drive module; The drive module is used to: amplify the received signal and then transmit it to the heating module to perform constant temperature and controllable power heating on the device; The microcontroller circuit can either drive the device's built-in display screen in one direction or drive the vehicle's instrument display screen in two directions for bidirectional communication. During bidirectional communication, the vehicle's instrument display screen can also communicate bidirectionally with a wireless device. During bidirectional communication, the vehicle's instrument display screen or the wireless device can display and operate various parameters of the device. The microcontroller circuit can simultaneously drive both the built-in display screen and the vehicle's instrument display screen.

2. The novel human body part heating device according to claim 1, characterized in that, The device also includes a flame-retardant module; the flame-retardant module is disposed between the drive module and the heating module; the flame-retardant module is used to melt and cut off the power when the device temperature is higher than a preset temperature threshold to achieve a flame-retardant protection function; the flame-retardant module is made of alloy material.

3. The novel human body part heating device according to claim 1, characterized in that, The device also includes an operation module; the operation module is connected to the microcontroller circuit, and the operation module is used to perform power on / off operations, temperature high / low settings, and over / under voltage settings.

4. The novel human body part heating device according to claim 1, characterized in that, The microcontroller circuit includes at least one microcontroller chip; The voltage module includes a first resistor and a second resistor; one end of the first resistor is connected to the operating voltage, and the other end of the first resistor is connected to one end of the second resistor and the microcontroller chip; the other end of the second resistor is grounded.

5. The novel human body part heating device according to claim 1, characterized in that, The temperature module includes a third resistor, a thermistor, and a first capacitor; one end of the third resistor is connected to +5V, and the other end of the third resistor is connected to one end of the thermistor, one end of the first capacitor, and the microcontroller chip; the other ends of the thermistor and the first capacitor are both grounded.

6. The novel human body part heating device according to claim 2, characterized in that, The driving module includes a field-effect transistor, a fourth resistor, and a fifth resistor; the source of the field-effect transistor is grounded, the drain of the field-effect transistor is connected to the flame-retardant module, and the gate of the field-effect transistor is connected to one end of the fourth resistor and one end of the fifth resistor, respectively; the other end of the fourth resistor is connected to the microcontroller circuit, and the other end of the fifth resistor is grounded.

7. The novel human body part heating device according to claim 3, characterized in that, The operation module includes a first button, a second button, a second capacitor, and a third capacitor; the first button and the second button are both connected to the microcontroller circuit; one end of the second capacitor is connected to the first button, and the other end of the second capacitor is grounded; one end of the third capacitor is connected to the second button, and the other end of the third capacitor is grounded.

8. The novel human body part heating device according to claim 1, characterized in that, The device also includes a voltage regulator circuit; the voltage regulator circuit is used to regulate the operating voltage to 5V to power the microcontroller circuit.

9. The novel human body part heating device according to claim 1, characterized in that, The heating module is made of resistive material.

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