TW201815051A - Hairdryers and fan rotation speed control modules thereof - Google Patents

Abstract

This invention hairdryers and fan rotation speed control module thereof which is used to solve no universal fan interface module of the conventional hairdryers. The fan rotation speed control module comprises a switching unit, a translating unit and a control assembly. The switching unit is used to input an AC electric power through a first AC terminal, to switch an electric power supplied by the AC electric power based on a speed instruction. The translating unit is electrically connected between the switching unit and a second AC terminal, to generate a DC level based on the electric power. The control assembly is electrically connected to the translating unit, the first AC terminal and the second AC terminal, to generate a speed signal based on the DC level. Thus, it can actually resolve the problem.

Description

   Blower and fan speed control module   

The invention relates to a fan speed control module; in particular, to a fan speed control module for a hair dryer and a hair dryer containing the fan speed control module.

The conventional fan can use this motor to convert electric energy into rotating power, so as to drive the fan blades to rotate and generate airflow. It can be used for electrical appliances that need to drive wind, such as: hair dryers, cooling fans or air conditioners.

Taking a hair dryer as an example, the electric wire can be heated to generate hot air by being energized, and the hot air is blown out by a fan driving the wind. The conventional hair dryer mainly uses AC to DC brushed motors as the power source for the fans. Due to factors such as the life and weight of the motor products, it has gradually begun to switch to brushless DC motors. When using a hair dryer, the power plug of the hair dryer is usually directly plugged into an electrical outlet, and the switch signal is transmitted to the controller on the fan through a switch on the handle or by pressing the panel to regulate the amount of hot air.

However, there are many suppliers who are familiar with fan controllers for hair dryers. Different suppliers design different speed control signal specifications, such as: AC signals and low voltage applicable specifications for speed control are different. The arbitrariness of the appliance does not have a universal standard. As a result, the fan controllers for various brands of hair dryers are only suitable for specific types of hair dryers. It is known that there is no universal fan referral module for hair dryers, allowing terminal manufacturers to limit the specific specifications when designing hair dryers Fan controller, which in turn increases the complexity of hair dryer design and maintenance.

In view of this, it is necessary to improve the shortcomings of the foregoing prior art to meet actual needs and improve its practicality.

The invention provides a hair dryer, which is not limited to a fan controller of a specific specification.

The invention also provides a fan speed control module for a hair dryer, which can be applied to hair dryers of different specifications.

The invention discloses a fan speed control module for a hair dryer, which may include: a switching unit for inputting an AC power through a first AC power terminal, and switching electric power supplied by the AC power according to a wind speed command; a conversion unit, Is electrically connected between the switching unit and a second AC power terminal, the conversion unit generates a DC level according to the electric power; and a regulating component, which is electrically connected to the conversion unit, the first AC power terminal and the second AC power At the end, the regulating component generates a speed signal according to the DC level.

The electric power may change according to the time when the AC power outputs electric energy to the conversion unit; the wind speed instruction may include a closed state, a low speed state, and a high speed state, and the switching unit may make the AC power according to the high speed state The electric power is immediately transmitted to the conversion unit. The switching unit may intermittently transmit the electric power of the AC power to the conversion unit according to the low speed state. The switching unit may prohibit the electric power of the AC power from being transmitted to the switching unit according to the off state. Conversion unit; the switching unit may be provided with a manual switch and a rectifying element, the manual switch may have a power input terminal, a stop output terminal, a low speed output terminal and a high speed output terminal, and the power input terminal may be electrically connected The first AC power terminal, the low-speed output terminal can be electrically connected to one end of the rectifier element, and the other end of the rectifier component can be electrically connected to the high-speed output terminal and the conversion unit. Thereby, a user can simply set the wind speed command to a closed state, a low speed state, or a high speed state, and the AC power can be used to directly control the wind speed of the hair dryer.

The conversion unit may be provided with a first photocoupler. The anode end of the first photocoupler may be electrically connected to the switching unit. A cathode end of the first photocoupler may be electrically connected through a first backstop. One of the first optocouplers is electrically connected to the DC terminal and the regulating component, and one of the first optocouplers is electrically connected to a ground terminal. In this way, the first optocoupler can be used to convert the electric energy from the positive half cycle of the AC power into DC power, which can be used as the basis for the fan speed and air volume control.

The conversion unit may be provided with a second photocoupler. An anode terminal of the second photocoupler may be electrically connected to the second AC power terminal. A cathode terminal of the second photocoupler may be passed through a second backstop. The switching unit is electrically connected. One set of the second optocoupler can be electrically connected to the DC terminal and the control component. One of the second optocouplers can be electrically connected to the ground terminal. Therefore, the second optocoupler can be used to convert the electric energy from the negative half cycle of the AC power into DC power, which can be used as the basis for the fan speed and air volume control.

The switching unit may be electrically connected to the anode terminal of the first photocoupler and the second backstop via a first resistor, a collector terminal of the first optocoupler and a collector terminal of the second optocoupler. The DC terminal can be electrically connected through a second resistor. The collector terminal of the first optocoupler and the collector terminal of the second optocoupler can be connected to the ground terminal in series through a third resistor and a capacitor. A series of terminals are electrically connected to the regulating component. In this way, the DC power converted from AC power can be temporarily stored to form a DC signal with a specific level, which can be used as the basis for fan speed and air volume control.

The control module may be provided with a transduction circuit and a control unit, the transduction circuit may be electrically connected to the first AC power terminal and the second AC power terminal, and the control unit may be electrically connected to the transduction circuit and the conversion unit And the wind drive unit; the control unit may be a special-purpose integrated circuit, a microcontroller, or a digital signal processor. In this way, a signal that can regulate the fan speed can be directly generated according to the DC signal of a specific level, and the internal control logic of the control unit can be changed to easily adjust the generation method of the specific level and speed signal.

The present invention also discloses a hair dryer, which may include the fan speed control module for the hair dryer described above. The control component of the fan speed control module may be electrically connected to a wind drive unit, so that the wind drive unit operates according to the speed signal; The wind drive unit may be a direct current fan; the hair dryer includes an electric heating module, and the electric heating module is electrically connected between the switching unit and the second AC power terminal.

The blower and fan speed control module are unveiled, which can provide a convenient and fixed fan speed control module that allows end-product manufacturers to directly use this module to produce hair dryers, which can directly use AC power to control DC fans without additional use. The converter can also avoid the disadvantages of AC to DC brushed motors, which can simplify the design and subsequent maintenance complexity of the manufacturer, thereby allowing consumers to save purchase and maintenance costs, which can achieve "reduced speed control complexity" and "reduced costs." Such effects can be widely applied to various types of hair dryers, and can end the chaotic signal specifications of speed control that vary with suppliers, which is conducive to increasing the value of related products.

1‧‧‧ switch unit

11‧‧‧Manual switch

111‧‧‧Power input

112‧‧‧Stop output

113‧‧‧low speed output

114‧‧‧High-speed output

12‧‧‧ Rectifier

121‧‧‧ One end of rectifier element

122‧‧‧ the other end of the rectifier element

2‧‧‧ Conversion Unit

21a‧‧‧First Optocoupler

21b‧‧‧Second Optocoupler

211‧‧‧Anode

212‧‧‧ cathode terminal

Episode 213‧‧‧ Extreme

214‧‧‧ shooting extreme

22‧‧‧The first backstop

23‧‧‧Second backstop

24‧‧‧First resistor

25‧‧‧Second resistor

26‧‧‧Third resistor

27‧‧‧Capacitor

28‧‧‧series connection

3‧‧‧Regulatory components

31‧‧‧ Transduction Circuit

32‧‧‧control unit

4‧‧‧wind drive unit

L‧‧‧First AC power terminal

N‧‧‧second AC power terminal

V‧‧‧DC terminal

G‧‧‧ Ground

FIG. 1 is a circuit architecture diagram of an embodiment of a fan speed control module for a hair dryer of the present invention.

In order to make the above and other objects, features, and advantages of the present invention more comprehensible, the following describes the preferred embodiments of the present invention in detail with the accompanying drawings, as follows: Directionality described in the entire text of the present invention Terms such as "front", "rear", "left", "right", "up (top)", "bottom (bottom)", "inside", "outside", "side", etc. are mainly referred to as additional The directions of the drawings and the directional terms are only used to assist in explaining and understanding the embodiments of the present invention, and are not intended to limit the present invention.

Please refer to FIG. 1, which is a circuit architecture diagram of an embodiment of a fan speed control module for a hair dryer of the present invention. The fan speed control module may include a switching unit 1, a conversion unit 2, a control unit 3, a first AC power terminal L and a second AC power terminal N. The switching unit 1 can be used to input an AC electric power (such as AC 110V) through the first AC power terminal L, and switch the electric power supplied by the AC power according to a wind speed command. For example, the user switches the switch to input different power Wind speed instruction, the electric power can be changed according to the time when the AC power outputs electric energy to the conversion unit, etc., to generate different wind speeds; the conversion unit 2 can be electrically connected between the switching unit 1 and the second AC power terminal N The conversion unit 2 can generate a DC level according to the electric power; the control unit 3 can be electrically connected to the conversion unit 2, the first AC power terminal L and the second AC power terminal N, and the control unit 3 A rotation speed signal can be generated according to the DC level. The following illustrates the implementation of the fan speed control module, but it is not limited to this.

For example, as shown in FIG. 1, the switching unit 1 may be an air volume switching module suitable for a hair dryer. The switching unit 1 may be provided with a manual switch 11 and a rectifying element 12. The manual switch 11 The manual switch 11 may be a switch or a pressing panel. The manual switch 11 may have a power input terminal 111, a stop output terminal 112, a low speed output terminal 113, and a high speed output terminal 114. The power input terminal 111 may be electrically connected to the first The AC power terminal L is used to input the AC power to the switching unit 1. The low-speed output terminal 113 can be electrically connected to one terminal 121 (such as an anode terminal or a cathode terminal) of the rectifier element 12 (such as a diode). The other end 122 of the rectifying element 12 is electrically connected to the high-speed output end 114 and the conversion unit 2, but is not limited thereto.

In this example, the wind speed command may be a wind speed state input by the user to the switching unit 1 by operating the manual switch 11, and the wind speed command may include an OFF state and a LOW state. And a "high speed" (HIGH), but not limited to this. Since the AC power can be directly input to the power input terminal 111, when the manual switch 11 is switched to the "high-speed state", the power input terminal 111 can be directly electrically connected to the conversion unit 2 via the high-speed output terminal 114. The conversion unit 2 can receive the current from the AC power at any time through the power input terminal 111 and the high-speed output terminal 114, so the switching unit 1 can make the electrical power of the AC power (approximately the full-time electrical power of the AC power according to the high-speed state). ) Immediately transmitted to the conversion unit 2.

On the other hand, when the manual switch 11 is switched to the "low-speed state", the power input terminal 111 can be indirectly connected to the conversion unit 2 via the low-speed output terminal 113 and the rectifier element 12, because the rectifier element 12 is a two-pole It has the function of “half-wave rectification” for alternating alternating currents with positive and negative half cycles. For example, if the rectifier element 12 is connected to the low-speed output terminal 113 with an anode terminal, the alternating current passes through the positive half cycle and becomes negative. The half-cycle is closed, the conversion unit 2 can receive the current from the AC power in the positive half-cycle; otherwise, the rectifier element 12 is connected to the low-speed output terminal 113 through the cathode terminal, and the AC power is closed in the negative half-cycle and the negative half-cycle. As a result, the conversion unit 2 can receive the current from the AC power in the negative half cycle. Therefore, no matter how the rectifier element 12 is connected between the low-speed output terminal 113 and the conversion unit 2, the conversion unit 2 can receive half-cycle (positive or negative half-cycle) AC power, so the switching unit 1 can intermittently transmit the electric power of the AC power (approximately half of the time of the AC power) to the conversion unit 2 according to the low speed state.

On the other hand, when the manual switch 11 is switched to the "off state", the power input terminal 111 is only connected to the stop output terminal 112, and the power input terminal 111 is not connected to the conversion unit 2. The conversion unit 2 cannot pass through The stop output terminal 112 receives the AC power, so the switching unit 1 can prohibit the electric power of the AC power from being transmitted to the conversion unit 2 according to the closed state.

Please refer to FIG. 1 again. The conversion unit 2 may be an electronic module with a function of converting electrical signals. The conversion unit 2 may be provided with a first photocoupler 21a, and an anode terminal 211 of the first photocoupler 21a. Is electrically connected to the switching unit 1, a cathode terminal 212 of one of the first optocouplers 21 a is electrically connected to the second AC terminal N through a first backstop 22, and a collector terminal 213 of one of the first optocouplers 21 a The DC terminal V and the regulating component 3 are electrically connected, and an emitter terminal 214 of one of the first photocouplers 21a is electrically connected to a ground terminal G.

Wherein, as shown in Fig. 1, the DC terminal V can be connected to a DC power source (such as DC 5V), and the current from the AC power can flow through the first AC terminal L, the switching unit 1, and the first photocoupler 21a. To the second AC power terminal N, use the "positive half-cycle" power of the AC power to drive the first optocoupler 21a, so that the collector terminal 213 outputs a logic signal, such as: output in the "positive half-cycle" of AC power "Low level logic", and output "high level logic" in the "negative half cycle" of AC power.

In addition, as shown in FIG. 1, the conversion unit 2 may further be provided with a second photocoupler 21b, and an anode terminal 211 of the second photocoupler 21b is electrically connected to the second AC power terminal N, and the second photocoupler A cathode terminal 212 of the converter 21b is electrically connected to the switching unit 1 via a second backstop 23. A collector terminal 213 of the second optocoupler 21b is electrically connected to the DC terminal V and the regulating component 3. An emitter terminal 214 of two photocouplers 21b is electrically connected to the ground terminal G. Thereby, the current from the AC power can flow to the first AC terminal L through the second AC terminal N, the second optocoupler 21b, and the switching unit 1 to obtain the "negative half cycle" power of the AC power. , Make the set extreme 213 output the logic signal, for example: output "high level logic" in "positive half cycle" of AC power, and output "low level logic" in "negative half cycle" of AC power.

As shown in FIG. 1, the switching unit 1 can be electrically connected to the anode terminal 211 of the first photocoupler 21 a and the second backstop 23 via a first resistor 24 to avoid the first An optocoupler 21a is burned due to excessive current; the collector terminal 213 of the first optocoupler 21a and the collector terminal 213 of the second optocoupler 21b can be electrically connected to the DC terminal V through a second resistor 25, This is to prevent the first photocoupler 21a and the second photocoupler 21b from being burned due to excessive current.

In addition, as shown in FIG. 1, the collector terminal 213 of the first optocoupler 21 a and the collector terminal 213 of the second optocoupler 21 b may be connected to the ground terminal in series through a third resistor 26 and a capacitor 27. G, and can form a series of connecting ends 28 electrically connected to the regulating component 3. Wherein, the capacitor 27 can output the DC level with different voltage values to the regulating component 3 according to the effect of the AC power on the first optocoupler 21a and the second optocoupler 21b. The detailed description is as follows. .

Wherein, when the wind speed instruction is "off state", the conversion unit 2 cannot receive the AC power because of the "off state", and the collector 213 of the first and second optocouplers 21a and 21b are connected to the AC. The "positive half cycle" and "negative half cycle" of the power both show the "high level", so that the capacitor 27 continuously generates a "high level voltage" DC level.

In addition, when the wind speed instruction is "low speed state", the conversion unit 2 intermittently receives the AC power due to the "low speed state". If the rectifying element 12 is turned on during the "positive half cycle" of the AC power, the first The set terminal 213 of the optocoupler 21a presents a "low level" in the "positive half cycle" of the AC power, and presents a "high level" in the "negative half cycle" of the AC power; otherwise, if the rectifier element 12 in The "negative half-cycle" of the AC power is turned on, and then the set pole 213 of the second optocoupler 21b appears at a "high level" at the "positive half-cycle" of the AC power, and at the "negative half-cycle" of the AC power "Low level". Therefore, when the conversion unit 2 intermittently receives the AC power due to the "low speed state", the capacitor 27 can accumulate only a part of the electric energy from the AC power, and then the power storage generates a "mid-level voltage" DC level.

When the wind speed command is "high-speed state", the conversion unit 2 receives the AC power immediately because of the "high-speed state", and the set terminal 213 of the first optocoupler 21a is presented in the "positive half-cycle" of the AC power. "Low level", the collector 213 of the second optocoupler 21b presents "low level" at the "negative half cycle" of the AC power, so that the capacitor 27 continuously generates a "low level voltage" DC level.

Please refer to FIG. 1 again, the regulating component 3 may be a device with a fan driving control function. The regulating component 3 may be provided with a transducing circuit 31 and a control unit 32. The transducing circuit 31 is electrically connected to the first An AC power terminal L and the second AC power terminal N convert the AC power to DC power. The voltage value of the DC power can also be adjusted to supply the power required by the control unit 32 (such as DC 5V). The control The unit 32 is electrically connected to the transducer circuit 31, the conversion unit 2 and the wind drive unit 4 to generate the speed signal according to the DC level, such as: a PWM signal, a "high level voltage" (closed state) The speed signal can have a first duty cycle, and the speed signal of "medium level voltage" (low speed state) can have a second duty cycle, "low level voltage" (high speed state), and "high level voltage" speed The signal may have a third duty cycle.

In this example, the energy conversion circuit 31 may be a rectifier with an AC-to-DC function, such as a full-wave or half-wave energy conversion circuit with voltage adjustment. In addition, the control unit 32 may be a motor with speed control function Device, such as a special function integrated circuit (ASIC), a microcontroller (MCU), or a digital signal processor (DSP), etc., the control unit 32 can execute a control logic (such as a software program or a hardware circuit), and Relevant data can be stored to generate a running signal (such as a PWM signal, etc.) to control the speed of the fan motor. Among them, the switching unit 1, the conversion unit 2 and the regulating component 3 of the fan speed control module can be integrated into one as required. An integrated circuit or a circuit board can be integrated into the fan, but not limited to this.

The above embodiment of the fan speed control module for a hair dryer of the present invention can be applied to improve the fan speed control function of a conventional hair dryer to form an embodiment of the hair dryer of the present invention (not shown). In this embodiment, the fan speed control module for the hair dryer can be made into an integrated circuit module or a circuit board module, etc. as needed to reduce the volume to expand the applicable product. The hair dryer may include the hair dryer. A fan speed control module, and the regulating component 3 of the fan speed control module can be electrically connected to a wind drive unit 4, which can be a DC fan, so that the wind drive unit 4 can be based on The rotation speed signal is used for drying or styling human or animal hair, but it is not limited to this. In addition, the hair dryer can also include an electric heating module (such as the conventional heating wire for hair dryers, etc.). (Illustrated), the electric heating module can be electrically connected between the switching unit 1 and the second AC power terminal N, and its assembly method can be understood by those having ordinary knowledge in the technical field to which it belongs, and it will not be repeated here.

Please refer to FIG. 1 again. When the above embodiment of the hair dryer and the fan speed control module of the present invention is used, the switching unit 1 may input the AC power through the first AC power terminal L for a user to follow the wind speed instruction ( (Such as: "off state", "low speed state", "high speed state", etc.), and the electric power supplied by the AC power is switched, so that the conversion unit 2 can generate different DC levels according to the electric power (such as: "high level" Voltage "," medium-level voltage "," low-level voltage ", etc.), the regulating component 3 can generate the speed signal according to the DC level, such as: generating PWM signals with different duty cycles according to different DC levels, etc. As a basis for controlling fan speed.

Thereby, the fan speed control module for the hair dryer of the above embodiments of the present invention can be modularized according to requirements, and a convenient and fixed fan speed control module is provided, which allows end product manufacturers to directly use the module By producing a hair dryer, you can directly use AC power to control the DC fan, without the need to use an additional converter, and to avoid the disadvantages of AC to DC brushed motors, which can simplify the design of manufacturers and the complexity of subsequent maintenance, thereby allowing consumers to save purchase and The maintenance cost can achieve the effects of "reducing the complexity of speed control" and "reducing costs". It can be widely used in various hair dryers and can end the chaos of speed control signal specifications that vary with suppliers, which is conducive to improving related products. value.

Although the present invention has been disclosed using the above-mentioned preferred embodiments, it is not intended to limit the present invention. Anyone skilled in the art can make various changes and modifications to the above embodiments without departing from the spirit and scope of the present invention. The technical scope protected by the invention, so the scope of protection of the present invention shall be determined by the scope of the appended patent application.

Claims (13)

    A fan speed control module for a hair dryer includes: a switching unit for inputting an AC power through a first AC power terminal, and switching the electric power supplied by the AC power according to a wind speed command; a conversion unit electrically connected to Between the switching unit and a second AC power terminal, the conversion unit generates a direct current level according to the electric power; and a regulating component electrically connected to the conversion unit, the first AC power terminal and the second AC power terminal, the regulation The component generates a speed signal according to the DC level.         The fan speed control module for a hair dryer according to item 1 of the scope of the patent application, wherein the electric power is changed according to the time when the AC power outputs electric energy to the conversion unit.         According to the fan speed control module for a hair dryer described in item 1 of the scope of patent application, wherein the wind speed instruction includes a closed state, a low speed state, and a high speed state, the switching unit makes the electric power of the AC power according to the high speed state. Immediately transmitted to the conversion unit, the switching unit intermittently transmits the electric power of the AC power to the conversion unit according to the low-speed state, and the switching unit prohibits the transmission of the electric power of the AC power to the conversion unit according to the closed state.         The fan speed control module for a hair dryer as described in item 1 of the scope of the patent application, wherein the switching unit is provided with a manual switch and a rectifying element. The manual switch has a power input terminal, a stop output terminal, and a low-speed output terminal. And a high-speed output terminal, the power input terminal is electrically connected to the first AC power terminal, the low-speed output terminal is electrically connected to one terminal of the rectifier element, and the other end of the rectifier element is electrically connected to the high-speed output terminal and the conversion unit.         The fan speed control module for a hair dryer according to item 1 of the scope of patent application, wherein the conversion unit is provided with a first photocoupler, and an anode terminal of the first photocoupler is electrically connected to the switching unit, and the first A cathode end of the photocoupler is electrically connected to the second AC power end through a first backstop, and a collection end of the first photocoupler is electrically connected to the DC end and the regulating component, the first photocoupler. One of the emitter terminals is electrically connected to a ground terminal.         According to the fan speed control module for a hair dryer described in item 5 of the scope of the patent application, wherein the conversion unit is provided with a second photocoupler, an anode terminal of the second photocoupler is electrically connected to the second AC power terminal, and A cathode terminal of a second optocoupler is electrically connected to the switching unit via a second backstop, and a collector terminal of the second optocoupler is electrically connected to the DC terminal and the regulating component. The second optocoupler One of the emitter terminals is electrically connected to the ground terminal.         According to the fan speed control module for a hair dryer described in item 6 of the scope of patent application, wherein the switching unit is electrically connected to the anode end of the first optocoupler and the second backstop via a first resistor, the The collector terminal of the first optocoupler and the collector terminal of the second optocoupler are electrically connected to the DC terminal through a second resistor. The collector terminal of the first optocoupler and the collector terminal of the second optocoupler. A third resistor and a capacitor are connected to the ground terminal in series, and a series terminal is electrically connected to the regulating component.         The fan speed control module for a hair dryer according to item 1 of the scope of patent application, wherein the regulating component is provided with a transducing circuit and a control unit, and the transducing circuit is electrically connected to the first AC power terminal and the second AC power End, the control unit is electrically connected to the energy conversion circuit, the conversion unit and the wind drive unit.         The fan speed control module for a hair dryer according to item 8 of the patent application scope, wherein the control unit is a special-purpose integrated circuit.         The fan speed control module for a hair dryer according to item 8 of the patent application scope, wherein the control unit is a microcontroller or a digital signal processor.         A hair dryer includes the fan speed control module for a hair dryer as described in the first to tenth of the scope of patent application, and the regulating component of the fan speed control module is electrically connected to a wind drive unit, so that the wind drive unit is based on the rotation speed. Signal.         The hair dryer according to item 11 of the scope of patent application, wherein the wind drive unit is a DC fan.         The hair dryer according to item 11 of the scope of patent application, further comprising an electric heating module electrically connected between the switching unit and the second AC power terminal.