Hair drier with air speed gear and temperature adjusting function

Abstract

The utility model relates to the technical field of hair driers, in particular to a hair drier with air speed gear and temperature adjusting functions, which comprises a hair drier outer shell, an air outlet is arranged at one end of the hair drier outer shell, an annular touch display panel is arranged on the back of the air outlet, and an annular luminous body is mounted on the annular touch display panel. Through the design of the annular touch display panel, the operation process is simplified, and the intuition and interactivity of the user interface are improved. A user can easily adjust parameters such as wind speed and temperature through the annular touch display panel without depending on traditional entity keys. In addition, the existence of the annular luminous body provides visual feedback, so that the operation perception of the user is enhanced. The main control circuit is effectively connected with the heating control circuit and other circuits, the working state of the hair drier can be monitored in real time, corresponding adjustment is conducted or an alarm is given out through the main control circuit, and therefore potential safety hazards caused by overheating, unstable voltage and other problems are effectively avoided.

Description

Technical Field

[0001] This utility model relates to the field of hair dryer technology, specifically to a hair dryer with wind speed settings and temperature adjustment functions. Background Technology

[0002] With the continuous advancement of personal care appliances, hair dryers, as an indispensable part of daily life, are also constantly evolving in design and function. However, hair dryers on the current market still face several challenges in terms of user experience. Traditional hair dryers typically rely on several physical buttons to control airflow, temperature, and operating modes. While this method is straightforward, it requires users to frequently switch between multiple buttons, increasing the complexity of use and making it less user-friendly for those seeking an efficient and convenient experience.

[0003] Furthermore, due to their structural characteristics, these physical buttons often accumulate dust and dirt in the crevices, making cleaning difficult. Over time, the buttons may also experience poor contact or even malfunction due to mechanical wear, which not only affects the user experience but also shortens the product's lifespan. Particularly regarding wind speed control, most hair dryers on the market only offer 3 to 6 preset speeds, limiting the possibility of users making more detailed adjustments according to personal preferences. Although some hair dryers have incorporated touch technology, in actual product design, a large number of physical buttons are still commonly retained for controlling core functions such as wind speed, temperature, and modes. The dense arrangement of numerous physical buttons on the control panel not only makes the overall design of the hair dryer increasingly complex, increasing product development and production costs, but also provides a poor user experience. In actual use, when styling hair with a hair dryer, users often need to distract themselves to accurately locate and press different physical buttons to adjust wind speed, temperature, or switch modes. This process is extremely cumbersome, making convenient and efficient one-handed operation difficult, greatly interfering with the user's smooth completion of the hair styling process, and seriously affecting user satisfaction with the ease of use of the hair dryer. Utility Model Content

[0004] This invention addresses the shortcomings and deficiencies of existing technologies by providing a convenient hair dryer with adjustable wind speed and temperature settings.

[0005] To achieve the above objectives, the present invention provides a hair dryer with wind speed settings and temperature adjustment functions, comprising a hair dryer housing. One end of the hair dryer housing has an air outlet, and the back of the air outlet has a ring-shaped touch display panel. A ring-shaped light emitter is mounted on the ring-shaped touch display panel. The hair dryer housing also houses a main control circuit, a heating control circuit, a wire frame temperature detection circuit, a MOS temperature detection circuit, a voltage detection circuit, a TFT display circuit, a touch detection circuit, an operational amplifier circuit, a button circuit, a motor drive circuit, and a power supply circuit. The main control circuit is electrically connected to the power supply circuit. The main control circuit communicates with the TFT display circuit via an SPI interface, and the touch detection circuit communicates with the main control circuit via an I / O interface. The heating control circuit, wire frame temperature detection circuit, MOS temperature detection circuit, voltage detection circuit, operational amplifier circuit, button circuit, and motor drive circuit are all communicatively connected to the main control circuit. The ring-shaped touch display panel is electrically connected to the touch detection circuit.

[0006] Further; the main control circuit includes a main control chip, a first diode, a second diode, a third diode, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, and a first resistor; the fifteenth pin of the main control chip is grounded; the first resistor, the first capacitor, and the first diode are connected in series, one end of which is electrically connected to the twenty-third pin of the main control chip, and the other end is electrically connected to the thirty-eighth pin of the main control chip; the twenty-first pin of the main control chip is electrically connected to the first capacitor; one end of the second capacitor is grounded, and the other end is electrically connected to the thirty-eighth pin of the main control chip; the second diode and the third capacitor are connected in series, one end of which is electrically connected to the thirty-third pin of the main control chip, and the other end is electrically connected to the first resistor; the thirty-fifth pin of the main control chip is electrically connected to the third capacitor; the third diode and the fourth capacitor are connected in series, one end of which is electrically connected to the second diode, and the other end is electrically connected to the twenty-seventh pin of the main control chip; the twenty-ninth pin of the main control chip... The fifth capacitor is electrically connected to the fourth capacitor; one end of the fifth capacitor is electrically connected to the second capacitor, and the other end is electrically connected to the fortieth pin of the main control chip; the thirty-ninth pin of the main control chip is electrically connected to the second capacitor; the third pin of the main control chip is electrically connected to the voltage detection circuit; the forty-second pin of the main control chip is electrically connected to the MOS temperature detection circuit; the ninth and tenth pins of the main control chip are electrically connected to the heating control circuit; the forty-fourth pin of the main control chip is electrically connected to the wire frame temperature detection circuit; the eleventh pin of the main control chip is electrically connected to the button circuit; the operational amplifier circuit is electrically connected to the fifth, sixth, and seventh pins of the main control chip; the motor drive circuit is electrically connected to the sixteenth, seventeenth, eighteenth, twenty-second, twenty-eighth, and thirty-fourth pins of the main control chip; and the touch detection circuit is electrically connected to the forty-third and forty-first pins of the main control chip via an I / O interface.

[0007] Further, the touch detection circuit includes a touch chip, a sixth capacitor, a seventh capacitor, an eighth capacitor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, a first touch key value, a second touch key value, a third touch key value, a fourth touch key value, a fifth touch key value, a sixth touch key value, a seventh touch key value, an eighth touch key value, and a ninth touch key value. The sixth pin of the touch chip is connected to a 3.3V voltage. One end of the second resistor is electrically connected to the eighth pin of the touch chip, and the other end is electrically connected to the sixth touch key value. One end of the third resistor is electrically connected to the ninth pin of the touch chip, and the other end is electrically connected to the fifth touch key value. One end of the fourth resistor is electrically connected to the tenth pin of the touch chip, and the other end is electrically connected to the fourth touch key value. One end of the fifth resistor is electrically connected to the eleventh pin of the touch chip, and the other end is electrically connected to the second touch key value. One end of the sixth resistor is electrically connected to the twelfth pin of the touch chip, and the other end is electrically connected to the third touch key value. The seventh resistor is electrically connected at one end to the twenty-fifth pin of the touch chip and at the other end to the first touch key value; the eighth resistor is electrically connected at one end to the twenty-fourth pin of the touch chip and at the other end to the seventh touch key value; the ninth resistor is electrically connected at one end to the twenty-third pin of the touch chip and at the other end to the eighth touch key value; the tenth resistor is electrically connected at one end to the twenty-second pin of the touch chip and at the other end to the ninth touch key value; the sixth capacitor is grounded at one end and connected to the twenty-eighth pin of the touch chip; the sixteenth pin of the touch chip is electrically connected to the forty-first pin of the main control chip through an I / O interface; the fifteenth pin of the touch chip is electrically connected to the forty-third pin of the main control chip through an I / O interface; the fifth pin of the touch chip is grounded; the seventh and eighth capacitors are connected in parallel, with one end electrically connected to the fifth pin of the touch chip and the other end electrically connected to the sixth pin of the touch chip; the sixth pin of the touch chip is connected to a 3.3V voltage.

[0008] Furthermore, the heating control circuit includes an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a first optocoupler, a second optocoupler, a switch, and a thyristor. The second pin of the thyristor is electrically connected to the switch. The eleventh and twelfth resistors are connected in series, with one end connected to the second pin of the thyristor and the other end connected to the third pin of the first optocoupler. The first pin of the first optocoupler is connected to a 5V voltage. The third pin of the thyristor is electrically connected to the fourth pin of the first optocoupler. One end of the thirteenth resistor is electrically connected to the second pin of the first optocoupler and the other end is connected to the ninth pin of the main control chip. The first pin of the second optocoupler is connected to a 5V voltage. One end of the fourteenth resistor is electrically connected to the second pin of the second optocoupler and the other end is connected to the tenth pin of the main control chip.

[0009] Furthermore, the MOS temperature detection circuit includes a fifteenth resistor, a ninth capacitor, and a first NTC thermistor; the ninth capacitor and the first NTC thermistor are connected in parallel, with one end electrically connected to the forty-second pin of the main control chip and the other end grounded; one end of the fifteenth resistor is connected to a 5V voltage, and the other end is electrically connected to the first NTC thermistor.

[0010] Furthermore, the wire frame temperature detection circuit includes a first socket, a sixteenth resistor, a seventeenth resistor, and a tenth capacitor; a second NTC thermistor is installed on the first socket; one end of the sixteenth resistor is electrically connected to the first pin of the first socket, and the other end is electrically connected to the forty-fourth pin of the main control chip; the second pin of the first socket is grounded; one end of the tenth capacitor is electrically connected to the forty-fourth pin of the main control chip, and the other end is electrically connected to the second pin of the first socket; one end of the seventeenth resistor is electrically connected to the sixteenth resistor, and the other end is connected to a 5V voltage.

[0011] Furthermore, the voltage detection circuit includes an eighteenth resistor, a nineteenth resistor, a twentieth resistor, and an eleventh capacitor; the eighteenth, nineteenth, and twentieth resistors are connected in series, with one end grounded and the other end electrically connected to the power supply circuit; the common terminal of the nineteenth and twentieth resistors is electrically connected to the third pin of the main control chip; one end of the eleventh capacitor is electrically connected to the twentieth resistor, and the other end is electrically connected to the third pin of the main control chip.

[0012] Furthermore, the power supply circuit includes an AC-DC conversion circuit, a step-down circuit, and a voltage regulator circuit.

[0013] Furthermore, the annular light-emitting body is equipped with an ambient LED light.

[0014] The beneficial effects of this utility model are:

[0015] This invention provides a hair dryer with adjustable wind speed and temperature settings. The circular touchscreen display panel simplifies operation and enhances the intuitiveness and interactivity of the user interface. Users can easily adjust parameters such as wind speed and temperature via the panel. Wind speed and temperature adjustments are not limited to the traditional three or more speed settings; specific settings can be selected based on actual needs, eliminating the need for traditional physical buttons. Furthermore, the ring-shaped light source provides visual feedback, enhancing the user's operational experience. Through effective connections between the main control circuit and the heating control circuit, wire frame temperature detection circuit, MOS temperature detection circuit, voltage detection circuit, TFT display circuit, touch detection circuit, operational amplifier circuit, button circuit, and motor drive circuit, the hair dryer's operating status can be monitored in real time. The main control circuit can then make corresponding adjustments or issue alarms, effectively preventing safety hazards caused by overheating or voltage instability. Integrated control of all functional modules of the hair dryer is also achieved. This design not only improves the overall performance of the device but also ensures coordinated operation between components, providing users with a more stable and reliable service. The TFT display circuit communicates with the main control circuit via the SPI interface, enabling various operating information and setting options to be presented in high definition on the circular touch display panel. This allows users to view and adjust settings at any time, improving ease of use and accuracy.

[0016] By abandoning traditional physical buttons and adopting a touch-sensitive control scheme, the risk of mechanical wear is reduced, while also facilitating cleaning and maintenance, further extending the product's lifespan. This hair dryer, featuring adjustable wind speeds and temperature, is not only simple in structure and low in cost but also easy to implement and promote. Attached Figure Description

[0017] Figure 1 This is a block diagram illustrating the working principle of a hair dryer with wind speed settings and temperature adjustment functions according to this utility model.

[0018] Figure 2 This is a schematic diagram of the main control circuit in a hair dryer with wind speed settings and temperature adjustment functions according to this utility model.

[0019] Figure 3 This is a schematic diagram of the touch detection circuit in a hair dryer with wind speed settings and temperature adjustment functions according to this utility model.

[0020] Figure 4 This is a schematic diagram of the heating control circuit in a hair dryer with wind speed settings and temperature adjustment functions according to this utility model.

[0021] Figure 5This is a schematic diagram of the MOS temperature detection circuit in a hair dryer with wind speed settings and temperature adjustment functions according to this utility model.

[0022] Figure 6 This is a schematic diagram of the temperature detection circuit of the wire frame in a hair dryer with wind speed settings and temperature adjustment functions according to this utility model.

[0023] Figure 7 This is a schematic diagram of the voltage detection circuit in a hair dryer with wind speed settings and temperature adjustment functions according to this utility model.

[0024] Figure 8 This is a schematic diagram of the power circuit in a hair dryer with wind speed settings and temperature adjustment functions according to this utility model.

[0025] Figure 9 This is a schematic diagram of the TFT display circuit in a hair dryer with wind speed settings and temperature adjustment functions according to this utility model.

[0026] Figure 10 This is a schematic diagram of the button circuit in a hair dryer with wind speed settings and temperature adjustment functions according to this utility model.

[0027] Figure 11 This is a schematic diagram of the operational amplifier circuit in a hair dryer with wind speed settings and temperature adjustment functions according to this utility model.

[0028] Figure 12 This is a circuit diagram of the motor drive circuit in a hair dryer with wind speed settings and temperature adjustment functions according to this utility model.

[0029] Figure 13 This is a circuit diagram of an ambient light in a hair dryer with wind speed settings and temperature adjustment functions according to this utility model. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0032] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0033] This utility model proposes a hair dryer with wind speed settings and temperature adjustment functions.

[0034] In the embodiments of this utility model, such as Figure 1-13 As shown, a hair dryer with speed settings and temperature adjustment functions includes a hair dryer housing. One end of the housing has an air outlet, and a ring-shaped touch display panel is located on the back of the air outlet. A ring-shaped light emitter is mounted on the ring-shaped touch display panel. The hair dryer housing also houses a main control circuit, a heating control circuit, a wire frame temperature detection circuit, a MOS temperature detection circuit, a voltage detection circuit, a TFT display circuit, a touch detection circuit, an operational amplifier circuit, a button circuit, a motor drive circuit, and a power supply circuit. The main control circuit is electrically connected to the power supply circuit. The main control circuit communicates with the TFT display circuit via an SPI interface, and the touch detection circuit communicates with the main control circuit via an I / O interface. The heating control circuit, wire frame temperature detection circuit, MOS temperature detection circuit, voltage detection circuit, operational amplifier circuit, button circuit, and motor drive circuit are all communicatively connected to the main control circuit. The ring-shaped touch display panel is electrically connected to the touch detection circuit.

[0035] In this embodiment, the main control circuit includes a main control chip, a first diode, a second diode, a third diode, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, and a first resistor. The fifteenth pin of the main control chip is grounded. The first resistor, the first capacitor, and the first diode are connected in series, with one end electrically connected to the twenty-third pin of the main control chip and the other end electrically connected to the thirty-eighth pin of the main control chip. The twenty-first pin of the main control chip is electrically connected to the first capacitor. One end of the second capacitor is grounded, and the other end of the second capacitor is connected to the thirty-eighth pin of the main control chip. The second diode and the third capacitor are connected in series, with one end electrically connected to the thirty-third pin of the main control chip and the other end electrically connected to the first resistor. The thirty-fifth pin of the main control chip is connected to the third capacitor. The third diode and the fourth capacitor are connected in series, with one end electrically connected to the second diode and the other end electrically connected to the twenty-seventh pin of the main control chip. The twentyth pin of the main control chip... Pin 9 is electrically connected to the fourth capacitor; one end of the fifth capacitor is electrically connected to the second capacitor, and the other end is electrically connected to pin 40 of the main control chip; pin 39 of the main control chip is electrically connected to the second capacitor; pin 3 of the main control chip is electrically connected to the voltage detection circuit; pin 42 of the main control chip is electrically connected to the MOS temperature detection circuit; pins 9 and 10 of the main control chip are electrically connected to the heating control circuit; pin 44 of the main control chip is electrically connected to the wire frame temperature detection circuit; pin 11 of the main control chip is electrically connected to the button circuit; the operational amplifier circuit is electrically connected to pins 5, 6, and 7 of the main control chip; the motor drive circuit is electrically connected to pins 16, 17, 18, 22, 28, and 34 of the main control chip; and the touch detection circuit is electrically connected to pins 43 and 41 of the main control chip via an I / O interface.

[0036] In this embodiment, the touch detection circuit includes a touch chip, a sixth capacitor, a seventh capacitor, an eighth capacitor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, a first touch key value, a second touch key value, a third touch key value, a fourth touch key value, a fifth touch key value, a sixth touch key value, a seventh touch key value, an eighth touch key value, and a ninth touch key value. The sixth pin of the touch chip is connected to a 3.3V voltage. One end of the second resistor is electrically connected to the eighth pin of the touch chip, and the other end is electrically connected to the sixth touch key value. One end of the third resistor is electrically connected to the ninth pin of the touch chip, and the other end is electrically connected to the fifth touch key value. One end of the fourth resistor is electrically connected to the tenth pin of the touch chip, and the other end is electrically connected to the fourth touch key value. One end of the fifth resistor is electrically connected to the eleventh pin of the touch chip, and the other end is electrically connected to the second touch key value. One end of the sixth resistor is electrically connected to the twelfth pin of the touch chip, and the other end is electrically connected to the third touch key value. Electrical connections are made as follows: one end of the seventh resistor is electrically connected to the twenty-fifth pin of the touch chip, and the other end is electrically connected to the first touch key value; one end of the eighth resistor is electrically connected to the twenty-fourth pin of the touch chip, and the other end is electrically connected to the seventh touch key value; one end of the ninth resistor is electrically connected to the twenty-third pin of the touch chip, and the other end is electrically connected to the eighth touch key value; one end of the tenth resistor is electrically connected to the twenty-second pin of the touch chip, and the other end is electrically connected to the ninth touch key value; one end of the sixth capacitor is grounded, and the other end is electrically connected to the twenty-eighth pin of the touch chip; the sixteenth pin of the touch chip is electrically connected to the forty-first pin of the main control chip through an I / O interface; the fifteenth pin of the touch chip is electrically connected to the forty-third pin of the main control chip through an I / O interface; the fifth pin of the touch chip is grounded; the seventh and eighth capacitors are connected in parallel, one end of which is electrically connected to the fifth pin of the touch chip, and the other end is electrically connected to the sixth pin of the touch chip; the sixth pin of the touch chip is connected to a 3.3V voltage.

[0037] In this embodiment, the heating control circuit includes an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a first optocoupler, a second optocoupler, a switch, and a thyristor. The second pin of the thyristor is electrically connected to the switch. The eleventh and twelfth resistors are connected in series, with one end connected to the second pin of the thyristor and the other end connected to the third pin of the first optocoupler. The first pin of the first optocoupler is connected to a 5V voltage. The third pin of the thyristor is electrically connected to the fourth pin of the first optocoupler. One end of the thirteenth resistor is electrically connected to the second pin of the first optocoupler and the other end is connected to the ninth pin of the main control chip. The first pin of the second optocoupler is connected to a 5V voltage. One end of the fourteenth resistor is electrically connected to the second pin of the second optocoupler and the other end is connected to the tenth pin of the main control chip.

[0038] In this embodiment, the MOS temperature detection circuit includes a fifteenth resistor, a ninth capacitor, and a first NTC thermistor; the ninth capacitor and the first NTC thermistor are connected in parallel, with one end electrically connected to the forty-second pin of the main control chip and the other end grounded; one end of the fifteenth resistor is connected to a 5V voltage, and the other end is electrically connected to the first NTC thermistor.

[0039] In this embodiment, the wire frame temperature detection circuit includes a first socket, a sixteenth resistor, a seventeenth resistor, and a tenth capacitor; a second NTC thermistor is installed on the first socket; one end of the sixteenth resistor is electrically connected to the first pin of the first socket, and the other end is electrically connected to the forty-fourth pin of the main control chip; the second pin of the first socket is grounded; one end of the tenth capacitor is electrically connected to the forty-fourth pin of the main control chip, and the other end is electrically connected to the second pin of the first socket; one end of the seventeenth resistor is electrically connected to the sixteenth resistor, and the other end is connected to a 5V voltage.

[0040] In this embodiment, the voltage detection circuit includes an eighteenth resistor, a nineteenth resistor, a twentieth resistor, and an eleventh capacitor; the eighteenth, nineteenth, and twentieth resistors are connected in series, with one end grounded and the other end electrically connected to the power supply circuit; the common terminal of the nineteenth and twentieth resistors is electrically connected to the third pin of the main control chip; one end of the eleventh capacitor is electrically connected to the twentieth resistor, and the other end is electrically connected to the third pin of the main control chip.

[0041] In this embodiment, the power supply circuit includes an AC-DC converter circuit, a step-down circuit, and a voltage regulator circuit.

[0042] In this embodiment, an ambient LED light is provided within the annular light-emitting body.

[0043] Specifically, by incorporating a ring-shaped touch display panel and a ring-shaped light emitter on the back of the air outlet, the user experience is greatly optimized. The ring-shaped touch display panel is connected to a touch detection circuit, and the main control circuit responds to operations, enabling intuitive and convenient function control. The ring-shaped light emitter changes color according to different operating states, providing instant visual feedback; for example, when adjusting fan speed and temperature, the color change allows users to quickly understand the current setting. This innovative design breaks through the limitations of traditional hair dryer interaction, bringing users a completely new experience.

[0044] The wire frame temperature detection circuit, MOS temperature detection circuit, and voltage detection circuit communicate with the main control circuit to monitor the hair dryer's operating status in real time. The wire frame temperature detection circuit provides timely feedback on the temperature of the heating element, allowing the main control circuit to adjust the heating control circuit accordingly to prevent excessively high air temperatures from damaging the hair. The MOS temperature detection circuit constantly monitors the temperature of the power components to prevent damage due to overheating. The voltage detection circuit ensures a stable power supply system, preventing abnormal voltage from affecting the hair dryer's performance and extending the device's lifespan.

[0045] The main control circuit communicates with the TFT display circuit via the SPI interface, clearly displaying the equipment's operating parameters. Working in conjunction with the motor drive circuit, it ensures stable motor operation and provides strong airflow. Collaborating with the operational amplifier circuit and button circuit, it accurately identifies user operations, guaranteeing stable equipment operation. The power supply circuit provides stable power to all circuit modules, enabling them to work together to improve the overall performance of the hair dryer.

[0046] The TFT display circuit communicates with the main control circuit via an SPI interface, clearly displaying the hair dryer's operating status such as wind speed and temperature, giving users a clear overview of the device's operation. Combined with the circular touch display panel, users can easily perform various operations, creating a convenient and efficient user experience.

[0047] The power supply circuit integrates an AC-DC conversion circuit, a step-down circuit, and a voltage regulator circuit, which can efficiently convert 220V AC power into 310V, 12V, and 5V DC power to provide stable power to each sub-circuit of the hair dryer and ensure that the equipment can operate stably in various scenarios.

[0048] The touch chip uses On-Bright's OB38S053 / QFN28 model, which detects touch key values ​​in real time through the I / O interface and quickly provides feedback on the touch status to ensure timely response to user operations. The button circuit uses tactile buttons, with one end grounded and the other end connected to the internal pull-up control port. A 100nF capacitor C20 is connected in parallel across the two ends of the button for filtering, effectively reducing signal interference and improving the stability and reliability of button operation.

[0049] The voltage detection circuit utilizes the voltage divider principle of the 18th, 19th, and 20th resistors to divide the 310V DC power into a lower voltage DC power. The internal AC-DC conversion circuit then accurately detects the voltage, ensuring stable operation of the power system. The MOS temperature detection module uses a voltage divider between the first NTC thermistor and the 15th resistor to detect the MOS temperature, facilitating real-time monitoring of the device's operating status and preventing damage due to overheating. Similarly, the wire frame temperature detection circuit uses a voltage divider between the second NTC thermistor and the 16th resistor to detect the wire frame temperature. Based on the detection results, the main control circuit precisely regulates the switching of the heating wire through the heating control circuit, achieving intelligent control of the airflow temperature and preventing hair damage due to excessive heat. The heating control circuit uses a SCR to control the heating switch and isolates the AC and DC control signals through the first and second optocoupler clutches, ensuring both control accuracy and improved safety.

[0050] The motor drive circuit adopts a full-bridge drive architecture, and the power module is equipped with 6 NMOS transistors. Since the main control chip has a built-in pre-drive function, it can directly drive the NMOS transistors, which not only optimizes the circuit design, but also ensures that the motor receives stable and strong driving force, achieves high-speed operation, and greatly improves drying efficiency.

[0051] The ambient lighting consists of nine RGB lights, connected in a 3-in-series, 3-in-parallel configuration. This simplifies the circuitry while creating a vibrant and colorful ambiance. The TFT display circuit uses an APT32F102 as the screen driver, paired with a W25Q64 for image caching. It communicates with the main control circuit via an SPI interface for high-speed communication, clearly displaying the hair dryer's wind speed, temperature, and other operating parameters, further enhancing the user experience.

[0052] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A hair dryer with wind speed stages and temperature adjustment function, comprising a hair dryer outer shell, characterized in that, The hair dryer housing has an air outlet at one end, and a ring-shaped touch display panel is located on the back of the air outlet. A ring-shaped light emitter is mounted on the ring-shaped touch display panel. The hair dryer housing also houses a main control circuit, a heating control circuit, a wire frame temperature detection circuit, a MOS temperature detection circuit, a voltage detection circuit, a TFT display circuit, a touch detection circuit, an operational amplifier circuit, a button circuit, a motor drive circuit, and a power supply circuit. The main control circuit is electrically connected to the power supply circuit. The main control circuit communicates with the TFT display circuit via an SPI interface, and the touch detection circuit communicates with the main control circuit via an I / O interface. The heating control circuit, wire frame temperature detection circuit, MOS temperature detection circuit, voltage detection circuit, operational amplifier circuit, button circuit, and motor drive circuit are all communicatively connected to the main control circuit. The ring-shaped touch display panel is electrically connected to the touch detection circuit.

2. The hair dryer with wind speed stages and temperature adjustment function according to claim 1, characterized in that, The main control circuit includes a main control chip, a first diode, a second diode, a third diode, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, and a first resistor. The fifteenth pin of the main control chip is grounded. The first resistor, the first capacitor, and the first diode are connected in series, with one end electrically connected to the twenty-third pin of the main control chip and the other end electrically connected to the thirty-eighth pin. The twenty-first pin of the main control chip is electrically connected to the first capacitor. One end of the second capacitor is grounded, and the other end is electrically connected to the thirty-eighth pin of the main control chip. The second diode and the third capacitor are connected in series, with one end electrically connected to the thirty-third pin of the main control chip and the other end electrically connected to the first resistor. The thirty-fifth pin of the main control chip is connected to the third capacitor. The third diode and the fourth capacitor are connected in series, with one end electrically connected to the second diode and the other end electrically connected to the twenty-seventh pin of the main control chip. The twenty-ninth pin of the main control chip... The fifth capacitor is electrically connected to the fourth capacitor; one end of the fifth capacitor is electrically connected to the second capacitor, and the other end is electrically connected to the fortieth pin of the main control chip; the thirty-ninth pin of the main control chip is electrically connected to the second capacitor; the third pin of the main control chip is electrically connected to the voltage detection circuit; the forty-second pin of the main control chip is electrically connected to the MOS temperature detection circuit; the ninth and tenth pins of the main control chip are electrically connected to the heating control circuit; the forty-fourth pin of the main control chip is electrically connected to the wire frame temperature detection circuit; the eleventh pin of the main control chip is electrically connected to the button circuit; the operational amplifier circuit is electrically connected to the fifth, sixth, and seventh pins of the main control chip; the motor drive circuit is electrically connected to the sixteenth, seventeenth, eighteenth, twenty-second, twenty-eighth, and thirty-fourth pins of the main control chip; and the touch detection circuit is electrically connected to the forty-third and forty-first pins of the main control chip via an I / O interface.

3. The hair dryer with wind speed stages and temperature adjustment function according to claim 2, characterized in that, The touch detection circuit includes a touch chip, a sixth capacitor, a seventh capacitor, an eighth capacitor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, a first touch key value, a second touch key value, a third touch key value, a fourth touch key value, a fifth touch key value, a sixth touch key value, a seventh touch key value, an eighth touch key value, and a ninth touch key value. The sixth pin of the touch chip is connected to a 3.3V voltage. One end of the second resistor is electrically connected to the eighth pin of the touch chip, and the other end is electrically connected to the sixth touch key value. One end of the third resistor is electrically connected to the ninth pin of the touch chip, and the other end is electrically connected to the fifth touch key value. One end of the fourth resistor is electrically connected to the tenth pin of the touch chip, and the other end is electrically connected to the fourth touch key value. One end of the fifth resistor is electrically connected to the eleventh pin of the touch chip, and the other end is electrically connected to the second touch key value. One end of the sixth resistor is electrically connected to the twelfth pin of the touch chip, and the other end is electrically connected to the third touch key value. One end of the seventh resistor is electrically connected to the twenty-fifth pin of the touch chip, and the other end is electrically connected to the first touch key value; one end of the eighth resistor is electrically connected to the twenty-fourth pin of the touch chip, and the other end is electrically connected to the seventh touch key value; one end of the ninth resistor is electrically connected to the twenty-third pin of the touch chip, and the other end is electrically connected to the eighth touch key value; one end of the tenth resistor is electrically connected to the twenty-second pin of the touch chip, and the other end is electrically connected to the ninth touch key value; one end of the sixth capacitor is grounded, and the other end is electrically connected to the twenty-eighth pin of the touch chip; the sixteenth pin of the touch chip is electrically connected to the forty-first pin of the main control chip through an I / O interface, and the fifteenth pin of the touch chip is electrically connected to the forty-third pin of the main control chip through an I / O interface; the fifth pin of the touch chip is grounded; the seventh and eighth capacitors are connected in parallel, one end of which is electrically connected to the fifth pin of the touch chip, and the other end is electrically connected to the sixth pin of the touch chip; the sixth pin of the touch chip is connected to a 3.3V voltage.

4. The hair dryer with wind speed stages and temperature adjustment function according to claim 3, characterized in that, The heating control circuit includes an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a first optocoupler, a second optocoupler, a switch, and a thyristor. The second pin of the thyristor is electrically connected to the switch. The eleventh and twelfth resistors are connected in series, with one end connected to the second pin of the thyristor and the other end connected to the third pin of the first optocoupler. The first pin of the first optocoupler is connected to a 5V voltage. The third pin of the thyristor is electrically connected to the fourth pin of the first optocoupler. One end of the thirteenth resistor is connected to the second pin of the first optocoupler and the other end is connected to the ninth pin of the main control chip. The first pin of the second optocoupler is connected to a 5V voltage. One end of the fourteenth resistor is connected to the second pin of the second optocoupler and the other end is connected to the tenth pin of the main control chip.

5. The hair dryer with wind speed stages and temperature adjustment function according to claim 4, characterized in that, The MOS temperature detection circuit includes a fifteenth resistor, a ninth capacitor, and a first NTC thermistor; the ninth capacitor and the first NTC thermistor are connected in parallel, with one end electrically connected to the forty-second pin of the main control chip and the other end grounded; one end of the fifteenth resistor is connected to a 5V voltage, and the other end is electrically connected to the first NTC thermistor.

6. The hair dryer with wind speed stages and temperature adjustment function according to claim 5, characterized in that, The wire frame temperature detection circuit includes a first socket, a sixteenth resistor, a seventeenth resistor, and a tenth capacitor. A second NTC thermistor is installed on the first socket. One end of the sixteenth resistor is electrically connected to the first pin of the first socket, and the other end is electrically connected to the forty-fourth pin of the main control chip. The second pin of the first socket is grounded. One end of the tenth capacitor is electrically connected to the forty-fourth pin of the main control chip, and the other end is electrically connected to the second pin of the first socket. One end of the seventeenth resistor is electrically connected to the sixteenth resistor, and the other end is connected to a 5V voltage.

7. The hair dryer with wind speed stages and temperature adjustment function according to claim 6, characterized in that, The voltage detection circuit includes an eighteenth resistor, a nineteenth resistor, a twentieth resistor, and an eleventh capacitor; the eighteenth, nineteenth, and twentieth resistors are connected in series, with one end grounded and the other end electrically connected to the power supply circuit; the common terminal of the nineteenth and twentieth resistors is electrically connected to the third pin of the main control chip; one end of the eleventh capacitor is electrically connected to the twentieth resistor, and the other end is electrically connected to the third pin of the main control chip.

8. The hair dryer with wind speed stages and temperature adjustment function according to claim 7, characterized in that, The power supply circuit includes an AC-DC converter circuit, a step-down circuit, and a voltage regulator circuit.

9. The hair dryer with wind speed stages and temperature adjustment function according to claim 1, characterized in that, An ambient LED light is installed inside the annular light-emitting body.

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