Air duct control circuit and air duct

Abstract

The utility model discloses an air duct control circuit and an air duct. The air duct control circuit comprises a touch sensing circuit which is used for outputting a human body trigger signal when being triggered by a human body; the moving sensing circuit is used for detecting the moving state of the air duct and outputting a corresponding moving sensing signal; the input end of the main control circuit is connected with the output end of the touch sensing circuit and the output end of the mobile sensing circuit, and the main control circuit is used for outputting a corresponding motor control signal according to the human body trigger signal output by the touch sensing circuit and / or the mobile sensing signal output by the mobile sensing circuit; the input end of the motor driving circuit is connected with the output end of the main control circuit, the output end of the motor driving circuit is used for being connected with a motor, and the motor driving circuit is used for controlling the motor to work according to the motor control signal. The utility model aims to improve the convenience and safety of the air duct.

Description

Technical Field

[0001] The utility model relates to the field of hair dryers, in particular to a hair dryer control circuit and a hair dryer. Background Art

[0002] When a traditional hair dryer is in use, no user will keep the hair dryer on all the time, which is not only dangerous but also may affect the service life of the hair dryer. Usually, the hair dryer is controlled by a button switch. However, when the user has to leave in a hurry due to something very urgent and forgets to turn off the hair dryer; or when a child plays with the hair dryer and doesn't know how to turn it off; all these situations will pose a threat to the life and property of the hair dryer or the user. Summary of the Invention

[0003] The main object of the utility model is to provide a hair dryer control circuit and a hair dryer, aiming to improve the convenience and safety of the hair dryer.

[0004] To achieve the above object, the hair dryer control circuit proposed by the utility model includes:

[0005] A touch sensing circuit, which is used to output a human trigger signal when triggered by a human body;

[0006] A motion sensing circuit, which is used to detect the motion state of the hair dryer and output a corresponding motion sensing signal;

[0007] A main control circuit, the input end of the main control circuit is connected to the output ends of the touch sensing circuit and the motion sensing circuit, and the main control circuit is used to output a first motor control signal according to the human trigger signal output by the touch sensing circuit and / or the motion sensing signal output by the motion sensing circuit;

[0008] A motor drive circuit, the input end of the motor drive circuit is connected to the output end of the main control circuit, the output end of the motor drive circuit is used to connect to a motor, and the motor drive circuit is used to control the motor to stop working according to the first motor control signal.

[0009] Optionally, the touch sensing circuit includes:

[0010] A touch control chip, the output end of the touch control chip is connected to the input end of the main control circuit, and the touch control chip is used to output a trigger signal to the main control circuit when triggered by a human body;

[0011] A power supply circuit, the input end of the power supply circuit is used to connect to a power source, the output end of the power supply circuit is connected to the power supply end of the touch control chip, and the power supply circuit is used to provide a working voltage for the touch control chip.

[0012] Optionally, the motion sensing circuit includes:

[0013] A three-axis acceleration sensor, the output end of the three-axis acceleration sensor is connected to the input end of the main control circuit, and the three-axis acceleration sensor is used to detect the moving state of the hair dryer and output a corresponding movement sensing signal to the main control circuit.

[0014] Optionally, the hair dryer has a heating wire, and the hair dryer control circuit further includes:

[0015] A heating wire control circuit, the input end of the heating wire control circuit is connected to the output end of the main control circuit, the control end of the heating wire control circuit is connected to the heating wire, and when the main control circuit receives the human body trigger signal output by the touch sensing circuit, it outputs a heating wire control signal to the heating wire control circuit to make the heating wire control circuit control the heating wire to stop working.

[0016] Optionally, the hair dryer control circuit further includes:

[0017] A first timer, the first timer is electrically connected to the main control circuit, when the main control circuit does not receive the human body trigger signal output by the touch sensing circuit, it controls the first timer to start timing, and when it receives the first timing trigger signal output by the first timer, it outputs a heating wire control signal to the heating wire control circuit to make the heating wire control circuit control the heating wire to stop working.

[0018] Optionally, the hair dryer control circuit further includes:

[0019] A second timer, the second timer is electrically connected to the main control circuit, when the main control circuit determines that the hair dryer is in a stationary state according to the movement sensing signal output by the movement sensing circuit, it controls the second timer to start timing, and when it receives the second timing trigger signal output by the second timer, it outputs a first motor control signal to the motor drive circuit to make the motor drive circuit control the motor to stop working.

[0020] Optionally, the hair dryer control circuit further includes:

[0021] A third timer, the third timer is electrically connected to the main control circuit, and the main control circuit is further used to control the third timer to start timing when it receives the second timing trigger signal output by the second timer, and control the hair dryer to switch to the sleep mode when it receives the third timing trigger signal output by the third timer.

[0022] Optionally, after the main control circuit controls the hair dryer to switch to the sleep mode, it is further configured to output a second motor control signal to the motor drive circuit according to the human body trigger signal output by the touch sensing circuit and / or the motion sensing signal output by the motion sensing circuit, so that the motor drive circuit controls the motor to operate.

[0023] The present utility model further provides a hair dryer, including the hair dryer control circuit and a motor as described above, and an output end of the motor drive circuit in the hair dryer control circuit is connected to a controlled end of the motor.

[0024] Optionally, the hair dryer further includes:

[0025] A housing, which forms a receiving cavity, and the hair dryer control circuit and the motor are received in the housing;

[0026] Control buttons, which are arranged on a surface of the housing, and the control buttons are electrically connected to a main control circuit in the hair dryer control circuit. When the control buttons are triggered, a switch signal is output to the main control circuit, and the main control circuit is configured to output a motor control signal to the motor drive circuit in the hair dryer control circuit according to the switch signal.

[0027] The technical solution of the present utility model constitutes a hair dryer control circuit through a touch sensing circuit, a motion sensing circuit, a main control circuit, and a motor drive circuit. Among them, the touch sensing circuit can output a human body trigger signal when triggered by a human body; while the motion sensing circuit detects the motion state of the hair dryer and outputs a corresponding motion sensing signal; the main control circuit can output a first motor control signal according to the human body trigger signal output by the touch sensing circuit and / or the motion sensing signal output by the motion sensing circuit; and the motor drive circuit controls the motor to stop operating according to the first motor control signal. In this way, the hair dryer control circuit in this solution can determine whether the user is using the hair dryer, and turn off the hair dryer when the user is not using the hair dryer, thereby improving the convenience and safety of the hair dryer. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0029] Figure 1 It is a schematic diagram of functional modules of an embodiment of the hair dryer control circuit of the present utility model;

[0030] Figure 2This is the circuit structure diagram of an embodiment of the motor drive circuit in the air duct control circuit of the present utility model;

[0031] Figure 3 This is the circuit structure of an embodiment of the touch sensing circuit in the air duct control circuit of the present utility model;

[0032] Figure 4 This is the circuit structure of an embodiment of the motion sensing circuit in the air duct control circuit of the present utility model;

[0033] Figure 5 This is the circuit structure of an embodiment of the heating wire control circuit in the air duct control circuit of the present utility model.

[0034] Explanation of the reference numerals in the drawings:

[0035] 10. Touch sensing circuit; 20. Motion sensing circuit; 30. Main control circuit; 40. Motor drive circuit.

[0036] The realization, functional features and advantages of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Specific embodiments

[0037] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0038] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0039] In addition, if there are descriptions such as "first", "second", etc. involved in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0040] At present, when using a traditional hair dryer, no user will keep the hair dryer on all the time. This is not only dangerous but also may affect the lifespan of the hair dryer. Usually, the hair dryer is controlled by a button switch. However, when the user has to leave in a hurry due to something very urgent and forgets to turn off the hair dryer; or when a child is playing and doesn't know how to turn off the hair dryer; in both cases, it will pose a threat to the life and property of the hair dryer or the user.

[0041] For this reason, the present utility model proposes a hair dryer control circuit.

[0042] Refer to Figure 1 , in one embodiment, the hair dryer control circuit includes:

[0043] A touch sensing circuit 10, which is used to output a human body trigger signal when triggered by a human body;

[0044] A motion sensing circuit 20, which is used to detect the motion state of the hair dryer and output a corresponding motion sensing signal;

[0045] A main control circuit 30, the input end of the main control circuit 30 is connected to the output end out1 of the touch sensing circuit 10 and the output end out2 of the motion sensing circuit 20. The main control circuit 30 is used to output a first motor control signal according to the human body trigger signal output by the touch sensing circuit 10 and / or the motion sensing signal output by the motion sensing circuit 20;

[0046] A motor drive circuit 40, the input end of the motor drive circuit 40 is connected to the output end of the main control circuit 30, the output end of the motor drive circuit 40 is used to connect to a motor, and the motor drive circuit 40 is used to control the motor to stop working according to the first motor control signal.

[0047] In this embodiment, the touch sensing circuit 10 may be composed of a touch chip, resistors, capacitors and other electronic components; the resistors, capacitors and other electronic components can play roles such as current limiting or voltage reduction to protect the touch chip. The touch sensing circuit 10 can sense the human body through the touch chip and output a corresponding electrical signal, that is, a human body trigger signal to the main control circuit 30. Through the human body trigger signal, it can be determined whether the user touches the hair dryer. If the user does not touch the hair dryer, it can represent that the user does not use the hair dryer. If the user touches the hair dryer, it can represent that the user is using the hair dryer. The movement sensing circuit 20 is used to detect the movement state of the hair dryer and can be composed of devices such as a sensor for detecting displacement or a sensor for detecting speed. It detects the movement state of the hair dryer and outputs a corresponding electrical signal, that is, a movement sensing signal to the main control circuit 30; the sensor for detecting displacement can output a signal representing the displacement distance. For example, if the displacement distance of the hair dryer exceeds a preset value, it represents that the hair dryer is in a moving state, indicating that the user is using the hair dryer; if the displacement distance of the hair dryer does not exceed the preset value, it represents that the hair dryer is in a stationary state, indicating that the user does not use the hair dryer. Or by detecting the moving speed of the hair dryer with a speed sensor, the movement state of the hair dryer can also be determined. Therefore, the specific sensing devices of the movement sensing circuit 20 can be selected according to user needs and are not limited here.

[0048] It can be understood that the touch sensing circuit 10 can determine whether the user is using the hair dryer, and the motion sensing circuit 20 can also determine whether the user is using the hair dryer; the main control circuit 30 in this embodiment can be composed of a controller and other electronic components. The controller can be a Digital Signal Processor (DSP), a Programmable Logic Device (PLD), a Field Programmable Gate Array (FPGA), a microprocessor, an MCU single-chip microcomputer or other electronic components. Therefore, the main control circuit 30 can independently determine the user's usage situation of the hair dryer according to the human body trigger signal output by the touch sensing circuit 10 or the motion sensing signal output by the motion sensing circuit 20, that is, select one of the signals for judgment. Thus, when it is determined that the user is not using the hair dryer, a first motor control signal is output to the motor drive circuit 40 to control the motor to stop working. In this way, it is not necessary for the user to manually turn off the hair dryer, and the situation of wasting electricity and damage caused by too long circuit working time due to forgetting to turn off the hair dryer can be avoided, which can improve the convenience and safety of the hair dryer. It should be noted that comprehensive judgment can also be made according to the human body trigger signal and the motion sensing signal. The comprehensive judgment can be to first judge whether the user touches the hair dryer through the human body trigger signal. After touching the hair dryer, then judge whether the user has been using the hair dryer through the motion sensing signal. If the hair dryer has been stationary after the user touches it, the hair dryer can be turned off; or first judge whether the user is using the hair dryer through the motion sensing signal, and then judge whether the user touches the hair dryer through the human body trigger signal. If the hair dryer is moving but the user does not touch the hair dryer, it may be that the hair dryer has fallen or moved due to being touched by an external force. At this time, the hair dryer can also be turned off; these are only two judgment methods, and other methods can also be used for judgment, which are not limited here. Therefore, the manufacturer can set the judgment conditions for whether the user is using the hair dryer according to the actual situation and user needs.

[0049] The motor drive circuit 40 is a circuit for driving the motor in the hair dryer to work, and can specifically be composed of a motor drive chip, a capacitor, a resistor and other electronic components. The motor drive circuit 40 can control the working state of the motor according to the electrical signal output by the main control circuit 30. For example, when receiving the low-level electrical signal output by the main control circuit 30, that is, the first motor control signal, it controls the motor to stop working. When receiving the high-level electrical signal output by the main control circuit 30, it controls the motor to start working. Of course, what kind of electrical signal the motor drive circuit 40 specifically receives to control the motor to stop working or start working can be set according to user needs.

[0050] The technical solution of the present utility model constitutes a hair dryer control circuit through a touch sensing circuit 10, a motion sensing circuit 20, a main control circuit 30, and a motor drive circuit 40. Among them, the touch sensing circuit 10 can output a human trigger signal when triggered by a human body; the motion sensing circuit 20 detects the motion state of the hair dryer and outputs a corresponding motion sensing signal; the main control circuit 30 can output a first motor control signal according to the human trigger signal output by the touch sensing circuit 10 and / or the motion sensing signal output by the motion sensing circuit 20; the motor drive circuit 40 controls the motor to stop working according to the first motor control signal. Thus, the hair dryer control circuit in this solution can determine whether the user is using the hair dryer and turn off the hair dryer when the user is not using it, thereby improving the convenience and safety of the hair dryer.

[0051] In an embodiment, the specific circuit structure of the motor drive circuit 40 can refer to Figure 2 for setting, and the parameters and labels therein are only for reference, and this solution is not limited herein. In this embodiment, an IPM chip with integrated mos drive can be used. This chip has hardware to prevent the short circuit and burnout of the motor caused by the abnormal drive chip. Of course, other types of drive chips can also be used according to user needs. This drive scheme is also called dual-resistance current sampling, which is a key performance index for ensuring successful startup and stable operation when the motor is starting and in a stable working state.

[0052] Referring to Figure 3 , in an embodiment, the touch sensing circuit 10 includes:

[0053] A touch control chip, the output end of the touch control chip is connected to the input end of the main control circuit 30, and the touch control chip is used to output a trigger signal to the main control circuit 30 when triggered by a human body;

[0054] A power supply circuit, the input end of the power supply circuit is used to connect to a power source, and the output end of the power supply circuit is connected to the power supply end of the touch control chip, and the power supply circuit is used to provide a working voltage for the touch control chip.

[0055] In this embodiment, the touch sensing circuit 10 can be composed of a touch control chip and a power supply circuit, and the specific circuit structure can refer to Figure 3Settings are made, and the parameters and labels therein are for reference only, and this solution is not limited herein. The touchpad can be set on the surface of the hair dryer and is electrically connected to the touch chip. When the touchpad is touched by the user, it will output a signal to the touch chip, so that the touch chip outputs a corresponding electrical signal, that is, a human body trigger signal to the main control circuit 30. For example, when someone touches the touchpad on the surface of the hair dryer, the touchpad outputs a signal to the touch chip, and the touch chip will output a high-level electrical signal to the main control circuit 30. In this way, it means that the user picks up or holds the hair dryer. When the human body does not touch the touch chip on the surface of the hair dryer, the touchpad does not output a signal to the touch chip, and the touch chip will output a low-level electrical signal to the main control circuit 30. In this way, it means that the user does not pick up or hold the hair dryer. Multiple touch chips and touchpads can also be set in the touch sensing circuit 10, that is, there are multiple touchpads for sensing whether the human body touches the hair dryer, so that the probability of being accidentally triggered by the human body can be reduced. Figure 3 In this embodiment, the power supply circuit can be composed of two capacitors in parallel. This is only a feasible method proposed in this embodiment. In actual applications, other power supply circuits can also be designed according to actual situations and user requirements, and this embodiment is not limited.

[0056] Refer to Figure 4 , in one embodiment, the motion sensing circuit 20 includes:

[0057] A three-axis acceleration sensor, the output end of the three-axis acceleration sensor is connected to the input end of the main control circuit 30, and the three-axis acceleration sensor is used to detect the motion state of the hair dryer and output a corresponding motion sensing signal to the main control circuit 30.

[0058] In this embodiment, the motion sensing circuit 20 can be composed of electronic components such as a three-axis acceleration sensor, a resistor, and a capacitor. The specific circuit structure can refer to Figure 4 for setting, and the parameters and labels therein are for reference only, and this solution is not limited herein. Through the three-axis acceleration sensor, the motion state of the hair dryer can be detected and a corresponding electrical signal can be output to the main control circuit 30. For example, if the main control circuit 30 detects that the acceleration of the hair dryer is zero or very small according to the electrical signal output by the three-axis acceleration sensor, it means that the hair dryer is in a stationary state. If the main control circuit 30 detects that the acceleration of the hair dryer is large enough according to the electrical signal output by the three-axis acceleration sensor, it means that the hair dryer is in a motion state. And in other embodiments, in addition to the three-axis acceleration sensor, other types of acceleration sensors or displacement sensors and other sensors can also be used to form the motion sensing circuit 20.

[0059] In one embodiment, the hair dryer has a heating wire. The heating wire of the hair dryer has a heating function, which can make the hair dryer blow hot air to meet the user's demand for hot air. However, when the user forgets to turn off the hair dryer, the heating wire will also be in the working state all the time and generate heat. If the heating wire generates heat for too long, safety accidents are likely to occur.

[0060] To solve the above problems, the hair dryer control circuit further includes:

[0061] A heating wire control circuit. The input end in of the heating wire control circuit is connected to the output end of the main control circuit 30. The control end of the heating wire control circuit is connected to the heating wire. When the main control circuit 30 receives the human trigger signal output by the touch sensing circuit 10, it outputs a heating wire control signal to the heating wire control circuit, so that the heating wire control circuit controls the heating wire to stop working.

[0062] In this embodiment, the heating wire control circuit can be composed of electronic components such as optocouplers and resistors. The specific circuit can refer to Figure 5 for setting. The parameters and labels therein are only for reference, and this solution is not limited here. The heating wire control circuit can control the heating wire to start heating or stop heating. Specifically, when the main control circuit 30 controls the motor drive circuit 40 to drive the motor to work, it also controls the heating wire control circuit to drive the heating wire to work, so that the hair dryer can blow hot air; when the main control circuit 30 controls the motor drive circuit 40 to drive the motor to stop working, it will also control the heating wire control circuit to drive the heating wire to stop working to prevent safety accidents. It should be noted that in this example, for the hair dryer, a heating control scheme with one heating wire or two heating wires can be adopted. Figure 5 For the heating wire control circuit of one heating wire, if two heating wires are designed, two heating wire control circuits as shown in Figure 5 are required to control the two heating wires to work respectively. It can be understood that the heating wire control circuit in this embodiment uses the optocoupler isolation method to ensure the separation of AC and DC, and can achieve a safe circuit solution. And the scheme of using two heating wires can reduce the interference to the power grid at the moment of startup.

[0063] In one embodiment, the hair dryer control circuit further includes:

[0064] A first timer. The first timer is electrically connected to the main control circuit 30. When the main control circuit 30 does not receive the human trigger signal output by the touch sensing circuit 10, it controls the first timer to start timing, and when it receives the first timing trigger signal output by the first timer, it outputs a heating wire control signal to the heating wire control circuit, so that the heating wire control circuit controls the heating wire to stop working.

[0065] In this embodiment, a first timer is set, which can start timing after the hair dryer is taken away from the hand or the body, so as to realize the delayed shutdown of the heating wire. For example, if the user only temporarily places the hair dryer on the table and picks it up again after one second, repeatedly turning on and off the heating wire in a short period of time will also affect the service life of the heating wire and the user experience. However, turning off the heating wire after a preset delay time, such as turning it off after a 20-second delay, will not affect the user experience, reduce the impact on the service life of the heating wire, and prevent safety accidents. It can be understood that when the main control circuit 30 receives the human body trigger signal, it means that the user touches the hair dryer. Therefore, when the main control circuit 30 does not receive the human body trigger signal, it means that the user does not touch the hair dryer. At this time, the first timer can be controlled to start timing. The first timer can output a first timing trigger signal to the main control circuit 30 after reaching the preset time, so that the main control circuit 30 outputs a heating wire control signal to the heating wire control circuit, thereby enabling the heating wire control circuit to control the heating wire to stop working; the preset time is the time for delaying the shutdown of the heating wire, and the specific preset time can be set according to user needs.

[0066] In one embodiment, the hair dryer control circuit further includes:

[0067] A second timer, the second timer is electrically connected to the main control circuit 30. When the main control circuit 30 determines that the hair dryer is in a stationary state according to the motion sensing signal output by the motion sensing circuit 20, it controls the second timer to start timing, and when receiving the second timing trigger signal output by the second timer, it outputs a first motor control signal to the motor drive circuit 40, so that the motor drive circuit 40 controls the motor to stop working.

[0068] In this embodiment, the set second timer can start timing when the hair dryer is in a stationary state, and after the second timer reaches the preset time, it will output a second timing trigger signal to the main control circuit 30. At this time, the main control circuit 30 can output a first motor control signal to the motor drive circuit 40, so that the motor drive circuit 40 controls the motor to stop working. The preset time for the second timer to time can be ten minutes, which is specifically set according to user needs; it can be understood that by delaying the shutdown of the hair dryer motor through the second timer, it can be judged whether the user uses the hair dryer according to the stationary time of the hair dryer. Usually, when the user holds the hair dryer, they will not stay still for a long time. Therefore, after the stationary time of the hair dryer exceeds the preset time of the second timer, it is determined that the user does not use the hair dryer, and at this time, the motor of the hair dryer can be controlled to stop working to avoid wasting electricity. And the preset time of the second timer can be set according to user needs.

[0069] In one embodiment, the hair dryer control circuit further includes:

[0070] A third timer, the third timer is electrically connected to the main control circuit 30, and the main control circuit 30 is further configured to control the third timer to start timing when receiving the second timing trigger signal output by the second timer, and control the hair dryer to switch to the sleep mode when receiving the third timing trigger signal output by the third timer.

[0071] In this embodiment, setting the third timer can start timing after the motor in the hair dryer stops working. After the third timer counts up to the preset time, it will output a third timing trigger signal to the main control circuit 30, and the main control circuit 30 will control each module in the hair dryer to enter the sleep mode according to the third timing trigger signal. Because the hair dryer may continue to consume power when connected to the power supply, entering the sleep mode can reduce the power consumption of the hair dryer. The preset time for the third timer to count can be one minute, and specifically, it can also be set according to user requirements.

[0072] In one embodiment, the main control circuit 30 is further configured to output a second motor control signal to the motor drive circuit 40 according to the human body trigger signal output by the touch sensing circuit 10 and / or the motion sensing signal output by the motion sensing circuit 20 after controlling the hair dryer to switch to the sleep mode, so that the motor drive circuit 40 controls the motor to work.

[0073] In this embodiment, if the hair dryer is still connected to the power supply after switching to the sleep mode, it can wake up the hair dryer when the user picks up the hair dryer again, so that the hair dryer enters the working state before entering the sleep mode. Specifically, when the main controller is in the sleep mode, when it judges that the user touches the hair dryer according to the human body trigger signal, or when it judges that the hair dryer is in the motion state according to the motion sensing signal, it can output a second motor control signal to the motor drive circuit 40, so that the motor drive circuit 40 controls the motor to work. The specific judgment conditions can be set by the designer according to the actual situation and user requirements.

[0074] The present utility model also provides a hair dryer. In one embodiment, the hair dryer includes the hair dryer control circuit and the motor as described above, and the output end of the motor drive circuit 40 in the hair dryer control circuit is connected to the controlled end of the motor. Since this hair dryer adopts all the technical solutions of the above all embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated herein one by one.

[0075] In one embodiment, the hair dryer further includes:

[0076] A housing, the housing is formed with a receiving cavity, and the hair dryer control circuit and the motor are received in the housing;

[0077] The control button is arranged on the surface of the housing. The control button is electrically connected to the main control circuit 30 in the hair dryer control circuit. When the control button is triggered, a switch signal is output to the main control circuit 30, and the main control circuit 30 is configured to output a motor control signal to the motor drive circuit 40 in the hair dryer control circuit according to the switch signal.

[0078] In this embodiment, the hair dryer may include a housing which forms a receiving cavity. The housing can be used to fix the positional relationship between the hair dryer control circuit and the motor in the receiving cavity, ensuring the safety and stability inside the receiving cavity formed by the housing. When the hair dryer is operating, the positional relationship between the hair dryer control circuit and the motor will not change, and external gases or objects cannot fall on the electrical components and chips in the hair dryer control circuit, affecting the normal operation of the hair dryer. The control button is a physical button arranged on the surface of the housing. When the user presses or touches the control button, the control button will output a switch signal to the main control circuit 30, causing the main control circuit 30 to output a motor control signal to control the motor drive circuit 40 to drive the motor to start or stop operating. For example, when the user presses the control button, the motor in the hair dryer starts to operate, and when the control button is pressed again, the motor will stop operating. Two control buttons can also be provided, respectively corresponding to controlling the motor to start and stop operating.

[0079] The above are only optional embodiments of the present invention, and thus do not limit the patent scope of the present invention. Any equivalent structural transformation made under the technical concept of the present invention by using the content of the specification and drawings of the present invention, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present invention.

Claims

1. A wind tube control circuit, characterized in that: include: A touch sensing circuit, used for outputting a human body triggering signal when being triggered by a human body; A motion sensing circuit is used to detect the movement state of the air duct and output a corresponding motion sensing signal; a main control circuit, wherein an input end of the main control circuit is connected to an output end of the touch sensing circuit and an output end of the motion sensing circuit, and the main control circuit is used to output a first motor control signal according to a human body trigger signal output by the touch sensing circuit and / or a motion sensing signal output by the motion sensing circuit; A motor drive circuit, wherein the input end of the motor drive circuit is connected to the output end of the main control circuit, the output end of the motor drive circuit is used to connect the motor, and the motor drive circuit is used to control the motor to stop working according to the first motor control signal.

2. The hair dryer control circuit according to claim 1, characterized in that: The touch sensing circuit comprises: A touch chip, wherein an output end of the touch chip is connected to an input end of the main control circuit, and the touch chip is used to output a trigger signal to the main control circuit when triggered by a human body; A power supply circuit, wherein the input end of the power supply circuit is used to access a power supply, the output end of the power supply circuit is connected to the power supply end of the touch control chip, and the power supply circuit is used to provide a working voltage to the touch control chip.

3. The hair dryer control circuit according to claim 1, characterized in that: The motion sensing circuit comprises: A three-axis acceleration sensor, the output end of which is connected to the input end of the main control circuit, and the three-axis acceleration sensor is used to detect the movement state of the wind tube and output a corresponding movement sensing signal to the main control circuit.

4. The hair dryer control circuit according to claim 1, characterized in that: The hair dryer has a heating wire, and the hair dryer control circuit also includes: A heating wire control circuit, wherein the input end of the heating wire control circuit is connected to the output end of the main control circuit, the control end of the heating wire control circuit is connected to the heating wire, and when the main control circuit receives the human body trigger signal output by the touch sensing circuit, the main control circuit outputs a heating wire control signal to the heating wire control circuit, so that the heating wire control circuit controls the heating wire to stop working.

5. The air duct control circuit according to claim 4, characterized in that: The wind tube control circuit also includes: A first timer, wherein the first timer is electrically connected to the main control circuit, and when the main control circuit does not receive the human body trigger signal output by the touch sensing circuit, the first timer is controlled to start timing, and when the first timing trigger signal output by the first timer is received, the heating wire control signal is output to the heating wire control circuit, so that the heating wire control circuit controls the heating wire to stop working.

6. The hair dryer control circuit according to claim 1, characterized in that: The wind tube control circuit also includes: The second timer is electrically connected to the main control circuit. When the main control circuit determines that the hair dryer is in a stationary state according to the motion sensing signal output by the motion sensing circuit, the second timer is controlled to start timing, and when the second timing trigger signal output by the second timer is received, the first motor control signal is output to the motor drive circuit, so that the motor drive circuit controls the motor to stop working.

7. The hair dryer control circuit according to claim 6, characterized in that: The wind tube control circuit also includes: The third timer is electrically connected to the main control circuit, and the main control circuit is also used to control the third timer to start timing when receiving the second timing trigger signal output by the second timer, and control the hair dryer to switch to sleep mode when receiving the third timing trigger signal output by the third timer.

8. The hair dryer control circuit according to claim 7, characterized in that: The main control circuit is also used to output a second motor control signal to the motor drive circuit after controlling the hair dryer to switch to sleep mode, based on the human trigger signal output by the touch sensing circuit and / or the movement sensing signal output by the movement sensing circuit, so that the motor drive circuit controls the operation of the motor.

9. A hair dryer, characterized in that: It comprises a hair dryer control circuit and a motor as described in any one of claims 1 to 8, wherein the output end of the motor driving circuit in the hair dryer control circuit is connected to the controlled end of the motor.

10. The hair dryer according to claim 9, characterized in that: The wind tube also includes: A housing, wherein the housing is formed with a housing cavity, and the air duct control circuit and the motor are accommodated in the housing; A control button is arranged on the surface of the shell, and the control button is electrically connected to the main control circuit in the hair duct control circuit. When the control button is triggered, the control button outputs a switch signal to the main control circuit, and the main control circuit is used to output a motor control signal to the motor drive circuit in the hair duct control circuit according to the switch signal.

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