Power tools and hair dryers

Abstract

The present invention provides an electric tool and a hair dryer. The electric tool includes: a housing; a drive motor disposed within the housing to provide driving force for the hair dryer; an energy source interface for connecting to an energy source to provide power to the drive motor; a first switch disposed on a power supply circuit of the power source and capable of controlling the drive motor to rotate in a full-power output mode; a second switch disposed on the power supply circuit of the power source and capable of controlling the drive motor to rotate in a variable-power mode; and a control unit electrically connected to at least the first switch or the second switch. The control unit is capable of detecting a state of the first switch or the second switch; when the first switch is closed, the drive motor is controlled to rotate in the full-power output mode; and when the second switch is closed, the drive motor is controlled to rotate in the variable-power output mode. Using the present invention, the hair dryer can be controlled to directly enter the maximum power output mode and operate at the maximum wind speed, thereby increasing the flexibility of the hair dryer control.

Description

Technical Field

[0001] The present invention relates to an electric tool, in particular to a hair dryer. Background Art

[0002] A hair dryer is a gardening tool used for cleaning yards, streets, and other areas. Common hair dryers offer different blowing speeds based on the level of debris, branches, and other debris within the area. The speed selection process typically starts from the lowest setting and increases gradually. However, in areas with heavy debris coverage, requiring a hair dryer to operate at a continuous, high speed, gradually increasing the speed using the speed control switch can result in the hair dryer's response being slow, and this gradual increase in speed can also reduce the efficiency of the maximum speed. Summary of the Invention

[0003] The main purpose of the present invention is to provide a hair dryer which can be controlled to directly enter a maximum power output mode and operate at a maximum wind speed.

[0004] In order to achieve the above main object of the invention, a hair dryer is provided, comprising:

[0005] An electric tool comprises: a housing; a drive motor, arranged in the housing to provide driving force for the hair dryer; an energy source interface, used to connect to an energy source to provide power to the drive motor; a first switch, arranged on the power supply circuit of the power supply, capable of controlling the drive motor to rotate in a full-power output mode; a second switch, arranged on the power supply circuit of the power supply, capable of controlling the drive motor to rotate in a variable power mode; a control unit, electrically connected to at least the first switch or the second switch; the control unit is configured to: detect the state of the first switch or the second switch; control the drive motor to rotate in a full-power output mode when the first switch is closed; and control the drive motor to rotate in a variable power output mode when the second switch is closed.

[0006] Furthermore, the hair dryer also includes: a second switch, which is arranged on the power supply circuit of the power supply and can control the drive motor to rotate in a variable power mode; the control unit is configured to: detect the state of the first switch and / or the second switch; when the first switch is closed, control the drive motor to rotate in the full power output mode; when the second switch is closed, control the drive motor to rotate in the variable power output mode.

[0007] Furthermore, the maximum output power of the drive motor when operating in the variable power output mode is less than the output power of the drive motor when operating in the full power output mode.

[0008] Furthermore, the full power output mode corresponds to the maximum speed of the drive motor; and the variable power mode corresponds to multiple speed adjustment gears of the drive motor.

[0009] Furthermore, the control unit is configured to: control the drive motor to stop rotating when the first switch is disconnected; and control the drive motor to stop rotating when the second switch is disconnected.

[0010] Furthermore, the control unit is configured to: when the first switch and the second switch are both closed, control the drive motor to rotate in the full power output mode.

[0011] Furthermore, it also includes: a storage unit for storing working data output by the control unit; the control unit is configured to: when the drive motor operates in the variable power output mode, the first switch is closed, the first speed of the drive motor when the first switch is closed is obtained and stored in the storage unit; and the drive motor is controlled to enter the full power output mode.

[0012] Furthermore, the control unit is configured to control the drive motor to resume rotating at the first speed when the first switch is disconnected.

[0013] Furthermore, the control unit is configured to: when the drive motor is operating in the full power output mode, when the second switch is closed, maintain the drive motor rotating in the full power output mode.

[0014] Furthermore, the control unit is configured to: when the drive motor is operating in the full-power output mode, the second switch is closed, and the current speed gear corresponding to the closure of the second switch is detected; when the first switch is disconnected, the drive motor is controlled to switch to the motor speed corresponding to the current speed gear.

[0015] A hair dryer comprises: a shell; a drive motor, arranged in the shell to provide driving force for the hair dryer; a power interface, used to connect to a power supply to provide power to the drive motor; a first switch, arranged on the power supply circuit of the power supply, capable of controlling the drive motor to rotate in a first working mode; a second switch, arranged on the power supply circuit of the power supply, capable of controlling the drive motor to rotate in a second working mode; the control unit is configured to: detect the state of the first switch or the second switch; when the first switch is closed, control the drive motor to rotate in the first working mode; when the second switch is closed, control the drive motor to rotate in the second working mode.

[0016] Furthermore, the output power of the drive motor when operating in the first operating mode is greater than the maximum output power of the drive motor when operating in the second operating mode.

[0017] The beneficial effect of the present invention is that the driving motor in the hair dryer can be controlled by one button to enter the maximum power output mode and operate at the maximum speed, thereby increasing the flexibility of tool control. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of a hair dryer in one embodiment of the present invention;

[0019] Figure 2 yes Figure 1 A switch control circuit diagram of a hair dryer;

[0020] Figure 3 yes Figure 1 A switch control circuit diagram of a hair dryer;

[0021] Figure 4 yes Figure 1 A switch control flow chart of a hair dryer;

[0022] Figure 5 yes Figure 1 A switch control flow chart of a hair dryer. DETAILED DESCRIPTION

[0023] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the drawings only illustrate portions relevant to the present invention, not all of the components.

[0025] It is understandable that the hair dryer 100 described in the present invention can be a handheld hair dryer or a backpack hair dryer.

[0026] Reference Figures 1 to 3The hair dryer 100 includes a housing 110, a first switch 120 and a second switch 130 being provided on the handle of the housing 110. A blowpipe 140 is provided at one end of the housing 110, and an energy source interface 150 is provided at the other end of the housing 110. A drive motor 160 is provided inside the housing 110, and the drive motor 160 can provide power for the blowpipe 140. A main control board is also provided inside the housing 110, and the main control board includes a control unit 170. The control unit 170 is connected to at least the first switch 120 or the second switch 130, and the control unit 170 can also output a control signal to control the drive motor 160 to rotate, stop, or change the speed.

[0027] The energy source interface 150 is used to connect to the energy source 151 . The interface may be a sliding or pluggable battery pack interface, or a USB interface for connecting to other portable power sources such as a power station.

[0028] In one embodiment, Figure 2 As shown, a drive circuit 161 is provided between the drive motor 160 and the control unit 170. The drive circuit 161 receives control signals from the control unit 170 and controls the speed or direction of rotation of the drive motor 160 by changing its own conduction state. Optionally, the drive circuit 161 may be composed of one or more switching elements. In one embodiment, the drive circuit 161 includes a plurality of switching elements Q1-Q6. Each gate terminal of the switching element is electrically connected to the control unit 170 for receiving control signals from the control unit 170. Each drain or source terminal of the switching element is connected to the stator winding of the drive motor 160. The switching elements Q1-Q6 receive control signals from the control unit 170 to change their respective conduction states, thereby changing the current applied to the stator winding of the motor by the power supply. In one embodiment, the drive circuit 161 may be a three-phase bridge driver circuit comprising six controllable semiconductor power devices (e.g., FETs, BJTs, IGBTs, etc.). It is understandable that the above-mentioned switching element may also be any other type of solid-state switch, such as an insulated gate bipolar transistor (IGBT), a bipolar junction transistor (BJT), etc.

[0029] To rotate the motor, the drive circuit 161 has multiple drive states. In one drive state, the stator winding of the drive motor 160 generates a magnetic field. The control unit 170 outputs a corresponding PWM control signal to the switching element in the drive circuit 161 based on the rotor position or back electromotive force of the drive motor 160, causing the drive circuit 161 to switch the drive state, thereby causing the stator winding to generate a changing magnetic field to drive the rotor to rotate, thereby achieving rotation or phase change of the drive motor 160. It should be noted that any other circuit and control method capable of driving the drive motor 160 to rotate or change phases can be used in the present disclosure. The present disclosure does not limit the circuit structure of the drive circuit 161 or the control of the drive circuit 161 by the control unit 170.

[0030] The first switch 120 is connected between the energy source 151 and the control unit 170 and can control the power-on state of the control unit 170. When the first switch 120 is closed, the control unit 170 is powered and can obtain the signal that the first switch 120 is turned on, thereby outputting a control signal to the drive circuit 161, causing the drive motor 160 to rotate in full-power output mode. The so-called full-power output mode means that the drive motor 160 rotates at maximum power and reaches the maximum speed, so that the blower pipe 140 can output the maximum wind force. The hair dryer 100 can be controlled to operate at maximum wind speed through a single switch. Optionally, the first switch 120 can be a signal switch, including an open (OFF) state and a closed (ON) state.

[0031] In one embodiment, Figure 3 As shown, the hair dryer 100 also includes a second switch 130. The second switch 130 is arranged on the output circuit of the energy source 151 to supply power to the control unit 170, and the second switch 130 can control the drive motor 160 to rotate in a variable power output mode. The so-called variable power output mode means that the drive motor 160 can change the motor speed according to the user's gear selection. Optionally, the second switch 130 can be a toggle switch, or a sliding switch or a rotary switch, including an open state and a closed state, and after the second switch 130 is in the closed state, the voltage across the switch can be adjusted by adjusting the position of the toggle button to realize the switch speed regulation function.

[0032] Optionally, the first switch 120 and the second switch 130 are connected in parallel between the energy source 151 and the control unit 170 to control the power-on state of the control unit 170. In one embodiment, a switching element 180 is connected between the control unit 170 and the energy source 151. The switching element 180 may be a power switch, such as a transistor. One end of the first switch 120 and the second switch 130 is connected to one end of the energy source 151, and the other end of the first switch 120 and the second switch 130 is connected to the gate of the switching element 180. The drain and source of the switching element 180 are connected to the other end of the control unit 170 and the energy source 151, respectively. In a specific implementation, when the first switch 120 and / or the second switch 130 are closed, the switching element 180 is turned on, thereby powering the control unit 170. Once powered, the control element 170 can detect the state of the first switch 120 and / or the second switch 130 and, based on the difference in the two switch states, control the drive circuit 161 to change the drive state, thereby changing the rotation state of the drive motor 160.

[0033] In one implementation, when the first switch 120 and / or the second switch 130 are closed, the control unit 170 is powered on and can detect the status of the first switch 120 and / or the second switch 130. Thus, when the control unit 170 detects that the first switch 120 is closed, it controls the drive motor 160 to operate in full power output mode, that is, it can directly control the hair dryer 100 to output maximum wind force to meet the user's needs. When the control unit 170 detects that the second switch 130 is closed, it controls the drive motor 160 to operate in variable power output mode. In this mode, the user can select different wind speed gears through the knob. Under each gear, the speed of the drive motor 160 is different, and the wind speed output by the hair dryer 100 is also different. For example, the second switch 130 is a rotary switch, and the fluctuation of the knob usually has a fluctuation sequence. In order to adapt to the conventional selection of gradually increasing wind speed from low to high, the second switch 130 can usually be toggled by the user to adjust the speed of the drive motor 160 from low to high. That is to say, in the variable power output mode, the drive motor 160 can also reach a higher speed, but the speed increase takes a certain process, so the hair dryer is not timely enough to respond to the user's special high-power blowing needs in this mode. Accordingly, when the control unit 170 detects that the first switch 120 is disconnected, it can control the drive motor 160 to stop rotating; or when the control unit 170 detects that the second switch 130 is disconnected, it can also control the drive motor 160 to stop rotating. In other words, either of the above two switches can independently control the start and stop of the drive motor 160. In this embodiment, in the above two cases, the first switch 120 and the second switch 130 independently control the drive motor 160.

[0034] To accommodate the need for flexible switching between the two operating modes of the drive motor 160 of the hair dryer 100, the first switch 120 and the second switch 130 can both be in a closed state. In one embodiment, when the first switch 120 is closed, the second switch 130 can also be closed; and when the second switch 130 is closed, the first switch 120 can also be closed. Optionally, the control panel of the hair dryer 100 can also be provided with a storage unit for storing operating data output by the control unit 170, such as status data of the first switch 120 and / or the second switch 130, speed data of the drive motor 160, etc.

[0035] In one embodiment, the control unit 170 can obtain the rotational speed of the drive motor 160 in real time or at preset intervals while the second switch 130 is closed and the drive motor 160 is operating in the variable power output mode. If the control unit 170 detects that the first switch 120 is closed while the drive motor 160 is operating in the variable power output mode, the control unit 170 can obtain the first rotational speed of the drive motor 160 before or at the time the first switch 120 is closed and store the rotational speed in a storage unit. Furthermore, the control unit 170 can switch the operating mode of the drive motor 160 from the variable power output mode to the full power output mode, allowing the drive motor 160 to quickly operate at the maximum rotational speed. Furthermore, when the first switch 120 is opened, the control unit 170 controls the drive motor 160 to resume operation at the first rotational speed. In other words, while the second switch 130 is closed, the first switch 120 can be controlled to close at any time to enable the drive motor 160 to rotate at the maximum rotational speed, and the first switch 120 can be opened at any time to enable the drive motor 160 to resume operation at the rotational speed before or at the time of the switch. That is, closing the first switch 120 can interrupt the variable power output mode of the drive motor 160 , and opening the first switch 120 can restore the variable power output mode of the drive motor 160 .

[0036] In one embodiment, when the first switch 120 is closed and the drive motor 160 is operating in full power output mode, the control unit 170 detects that the second switch 130 is closed and maintains the full power output mode of the drive motor 160 without switching modes. Optionally, the control unit 170 can obtain the current speed gear corresponding to when the second switch 130 is closed, so that after the first switch 120 is opened and the second switch 130 is still closed, the drive motor 160 is controlled to switch from the highest speed to the motor speed corresponding to the current speed gear. In other words, when the first switch 120 is closed, the closing of the second switch 130 cannot affect the state of the drive motor 160 operating at the maximum speed, but after the first switch 120 is opened, the speed of the drive motor 160 can be changed according to the speed gear corresponding to the knob of the second switch 130.

[0037] In one embodiment, when the first switch 120 is closed and the drive motor 160 is operating in full power output mode, the control unit 170 detects that the second switch 130 is closed, and can control the drive motor 160 to switch from full power output mode to variable power output mode, and change the motor speed according to the speed control gear corresponding to the second switch 130.

[0038] In one embodiment, Figure 3 As shown, the hair dryer 100 is provided with a first switch 120 and a second switch 130. The control unit 170 can detect the status of the first switch 120 and / or the second switch 130 in real time or periodically, where the switch status specifically includes whether it is closed or open. If the first switch 120 is closed, the switch element 180 is turned on, and the control unit 170 is powered on, the control unit 170 can detect that the first switch 120 is closed. The control unit 170 can then control the drive motor 160 to rotate in the first operating mode. If the second switch 130 is closed, the switch element 180 is also turned on, and the control unit 170 is powered on, the control unit 170 can detect that the second switch 130 is closed. The control unit 170 can then control the drive motor 160 to rotate in the second operating mode. Optionally, the output power of the drive motor 160 in the first operating mode is greater than its maximum output power in the second operating mode. In other words, the first operating mode can be the full power output mode in the above-mentioned embodiment, and the second operating mode can be the variable power output mode in the above-mentioned embodiment.

[0039] Optionally, the first operating mode may be the variable power output mode, and the second operating mode may be the full power output mode. Then the maximum output power in the first operating mode is less than the output power in the second operating mode.

[0040] In this embodiment, the first switch 120 and the second switch 130 can also independently control the on / off of the drive motor 160, as in the above embodiment, or can be closed simultaneously. The control logic of the control unit 170 when the two switches are closed simultaneously can refer to the description of the above embodiment.

[0041] In this embodiment, the hair dryer can be directly turned on by the switch, that is, it can be operated at the maximum wind speed, which increases the flexibility of controlling the working mode of the hair dryer.

[0042] Reference Attachment Figure 4 The control process of the hair dryer is given, which includes the following steps:

[0043] S101, detecting the state of the first switch.

[0044] In a specific implementation, after the first switch is closed, the control unit is powered on, so that the state of the first switch can be detected.

[0045] S102, determine whether the first switch is closed. If so, proceed to step S103, otherwise continue to determine.

[0046] S103, controlling the drive motor to rotate in a full power output mode.

[0047] Reference Attachment Figure 5 Another control process of a hair dryer is given, which includes the following steps:

[0048] S201, detecting the state of the first switch or the second switch.

[0049] S202, determine whether the first switch or the second switch is closed. If not, continue to detect, if yes, go to step S203.

[0050] S203, determining whether the first switch and the second switch are both closed, if so, proceeding to step S204, otherwise proceeding to step S205 and step S206.

[0051] S204, controlling the drive motor to rotate in a full power output mode.

[0052] S205: If it is detected that the first switch is closed, the process goes to step S204.

[0053] S206: If it is detected that the second switch is closed, the process proceeds to step S207.

[0054] S207, controlling the drive motor to rotate in a variable power output mode.

[0055] Those skilled in the art will appreciate that the embodiments of the present invention described above and shown in the accompanying drawings are intended to be illustrative only and are not intended to limit the present invention. The objectives of the present invention have been fully and effectively achieved. The functional and structural principles of the present invention have been demonstrated and illustrated in the embodiments. Any variations or modifications may be made to the embodiments of the present invention without departing from the principles described.

Claims

1. An electric tool comprising: case; a driving motor, disposed in the housing to provide driving force for the hair dryer; An energy source interface, used to connect to an energy source to provide power to the drive motor; a first switch, provided on a power supply circuit of the power source, capable of controlling the drive motor to rotate in a full power output mode; a second switch, provided on a power supply circuit of the power source, capable of controlling the drive motor to rotate in a variable power mode; a control unit, electrically connected to at least the first switch or the second switch; The control unit is configured to: detecting a state of the first switch or the second switch; When the second switch is in an off state, the drive motor is controlled to rotate in a full power output mode when the first switch is closed; and then when the first switch is opened, the drive motor is controlled to stop rotating; When the second switch is closed, the drive motor is controlled to rotate in a variable power output mode.

2. The electric tool according to claim 1, wherein: The maximum output power of the drive motor when operating in the variable power output mode is less than the output power of the drive motor when operating in the full power output mode.

3. The electric tool according to claim 1, wherein: The full power output mode corresponds to the maximum speed of the drive motor; The variable power mode corresponds to a plurality of speed regulating gears of the drive motor.

4. The electric tool according to claim 1, wherein: The control unit is configured to: When the second switch is turned off, the driving motor is controlled to stop rotating.

5. The electric tool according to claim 1, wherein: The control unit is configured to: When both the first switch and the second switch are closed, the drive motor is controlled to rotate in the full power output mode.

6. The electric tool according to claim 1, wherein: Also includes: a storage unit, used for storing the working data output by the control unit; The control unit is configured to: When the drive motor operates in the variable power output mode, the first switch is closed, and a first rotational speed of the drive motor when the first switch is closed is acquired and stored in the storage unit; The driving motor is controlled to enter the full power output mode.

7. The electric tool according to claim 6, wherein: The control unit is configured to: When the first switch is disconnected, the drive motor is controlled to resume rotating at the first speed.

8. The electric tool according to claim 1, wherein: The control unit is configured to: When the drive motor is operating in the full power output mode, when the second switch is closed, the drive motor is maintained to rotate in the full power output mode.

9. The electric tool according to claim 8, wherein: The control unit is configured to: When the drive motor is operating in the full power output mode, the second switch is closed, and the current speed adjustment gear corresponding to the closing of the second switch is detected; When the first switch is disconnected, the drive motor is controlled to switch to the motor speed corresponding to the current speed adjustment gear.

10. A hair dryer comprising: case; a driving motor, disposed in the housing to provide driving force for the hair dryer; A power interface, used to connect to a power source to provide power to the drive motor; a first switch, disposed on a power supply circuit of the power source, capable of controlling the drive motor to rotate in a first working mode; a second switch, provided on a power supply circuit of the power source, capable of controlling the drive motor to rotate in a second working mode; The control unit is configured to: detecting a state of the first switch or the second switch; When the second switch is in an off state, when the first switch is closed, the drive motor is controlled to rotate in the first working mode; and then when the first switch is opened, the drive motor is controlled to stop rotating; When the second switch is closed, the drive motor is controlled to rotate in the second working mode.

11. The hair dryer according to claim 10, characterized in that The output power of the drive motor when operating in the first operating mode is greater than the maximum output power of the drive motor when operating in the second operating mode.

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