KR200421353Y1 - Hand dryer - Google Patents

Abstract

The present invention relates to a hand dryer that can control the driving of the motor in multiple stages to minimize the discomfort caused by the noise generated by the initial motor drive.

The hand dryer according to the present invention drives a motor provided in the main body to introduce external air into the main body, generates hot air that raises the introduced external air to a predetermined temperature using the waste heat of the motor, and then discharges the hot air to the outside. In the hand dryer to dry the user's hand by changing the level of the power input to the speed converter for changing the output power provided to the motor, and through the speed converter Initially, the motor driving means is provided with a motor driving means including a speed control unit for performing the speed control of the M stage to rotate from low speed to high speed, and the speed conversion unit is based on a control signal applied from the speed control unit. N switches for interrupting the output of the N resistors, characterized in that the combination is configured in a one-to-one corresponding form.

Hand Dryer, Motor, Multistage Control

Description

Hand Dryer {Hand dryer}

1 is an external perspective view of a hand dryer according to a first embodiment of the present invention;

FIG. 2 is a sectional view of the hand dryer shown in FIG.

3 is a view for explaining the configuration of the hot air generating means 22 shown in FIG.

Figure 4 is a block diagram showing the functional separation of the internal configuration of the control module 30 shown in FIG.

FIG. 5 is a block diagram functionally separating the internal configuration of the motor drive block 32 shown in FIG.

FIG. 6 is a diagram illustrating the configuration of the switch shown in FIG. 5; FIG.

7 is a view showing a change in output voltage according to the resistance value of the speed converter 322 shown in FIG.

8 is a view showing a change in the motor rotational speed according to the time interval of the speed converter 322 shown in FIG.

******* Brief description of the main parts of the drawing *******

10: main body, 20: duct,

30: control module, 31: sensor drive block,

32: motor drive block, 33: display control block,

34: power control block, 321: motor drive unit,

322: speed converter, 323: speed controller.

The present invention relates to a hand dryer that can control the driving of the motor in multiple stages to minimize the discomfort caused by the noise generated by the initial motor drive.

People wash their hands or wash their hands to keep clean. Your hands will be washed several times a day, and after you wash your hands, use a towel to wipe off the water on your hands.

Meanwhile, in the case of a public toilet installed in a general building or a public institution, a paper towel is provided as a means for removing water on a user's hand after washing hands. However, since paper towels are disposable, there is a lot of waste of resources as well as inconvenience that requires continuous management.

Therefore, in recent years, a hand dryer, in which hot air is generated when a hand is detected and a hand is dried, is widely used in public toilets.

The hand dryer generally drives the motor to rotate the fan coupled to the motor to introduce external air into the main body, and then compresses the external air introduced through the waste heat of the motor provided in the main body to a predetermined temperature. It is configured to discharge the hot air of a predetermined temperature to the outside through a nozzle installed in the main body. That is, the user places his / her wet hand on the nozzle portion of the hand dryer to dry the hand.

Here, a motor operated to introduce external air when driving the hand dryer causes noise. At this time, the speed of the motor is in proportion to the noise. In other words, the higher the rotational speed of the motor, the greater the noise. However, in the conventional hand dryer, the motor is operated at the same rotational speed for a predetermined time. That is, when the hand dryer is driven, a noise is suddenly generated by driving the motor in a quiet state. The sudden occurrence of early noise can cause a handful of user's hearing discomfort.

Accordingly, the present invention was devised in view of the above circumstances, and by driving a multi-stage motor at low speed and high speed to introduce external air when driving a hand dryer, the user may feel audible discomfort caused by sudden generation of initial noise. Its technical purpose is to provide a hand dryer that can be minimized.

The hand dryer according to the present invention for achieving the above object drives a motor provided in the main body to introduce external air into the main body, and generates hot air by compressing the external air in the main body and then discharges the hot air to the outside. A hand dryer configured to dry a hand, comprising: a speed converter for changing an output power provided to the motor by changing a level of an input power; Initially, the motor driving means is provided with a motor driving means including a speed control unit for performing the speed control of the M stage to rotate from low speed to high speed, and the speed conversion unit is based on a control signal applied from the speed control unit. N switches for interrupting the output of the N resistors, characterized in that the combination is configured in a one-to-one corresponding form.

In addition, the hand dryer according to the present invention is configured by the N resistors of the speed conversion unit is coupled in parallel, the speed control unit is the speed conversion by combining each switch on (ON) / off (OFF) state at a predetermined time interval While adjusting the voltage value output from the negative, it characterized in that the output power is controlled to gradually increase.

In addition, the hand dryer according to the present invention is the N resistors of the speed converter are configured to be coupled in parallel, and the speed controller controls the ON / OFF switch to have a rotational speed of the motor corresponding to information set by the user. In the initial stage of driving, the state combinations of all the switches are controlled ON / OFF at predetermined time intervals so as to have the minimum resistance value from the maximum resistance value.

In addition, the hand dryer according to the present invention is characterized in that the switch is composed of a photodiode.

That is, according to the above, by controlling the drive of the motor for introducing and compressing external air and generating hot air from a low speed to a high speed, the user is minimized by the user's hearing discomfort due to the sudden noise caused by the motor driving. It becomes possible to use a hand dryer with a more comfortable feeling.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

1 is an external perspective view of a hand dryer according to a first embodiment of the present invention, and FIG. 2 is a cross-sectional view of the hand dryer shown in FIG.

1 and 2, the hand dryer according to the present invention has a rectangular main body 10, a duct 20 installed inside the main body 10 to generate hot air, and a driving of the hand dryer as a whole. It is configured to include a control module 30 for controlling.

Here, a hand input part 11 having a predetermined width is formed in the upper center portion of the main body 10 so as to insert a user's hand, and the first and second hands are formed on both sides of the hand input part 11. The protrusions 101 and 102 are provided with a nozzle 12, a sensor 13, and a display means 14.

The nozzle 12 is for discharging hot air generated in the duct 20 to the outside, and a plurality of nozzles 12 are arranged in a horizontal direction of the main body 10. In this case, the nozzle 12 forms the first nozzle 121 on the first protrusion 101 and the second nozzle 122 on the second protrusion 102 so that hot air is discharged toward the hand input part 11. To form. That is, the nozzle 12 discharges the hot air to the back and palm of the user's hand, which is put into the hand inlet 11.

In addition, the sensor 13 is a means for detecting whether the user's hand is input to the hand input unit 11, the infrared transmitting unit 131 installed on the first protrusion 101 and the second protrusion 102 is installed. It is composed of an infrared receiver 132.

In addition, the display means 14 is for displaying the motor driving speed and the remaining time of hot air discharge of the hand dryer, for example, may be composed of a plurality of LEDs. At this time, the display means 14 may further comprise a power display for displaying whether or not the power is supplied.

Meanwhile, as shown in FIG. 2, the duct 20 installed inside the main body 10 has a body “21” having an integral “Y” shape and a hollow inside thereof, and a lower side of the main body 21. Is installed in the hot air generating means 22 is configured to generate hot air by heating the outside air to a predetermined temperature.

The body 21 has a shape in which the upper end thereof is separated into both sides, and one side of the first upper portion 211 is connected to the first nozzle 121 formed on the first protrusion 101 and the second upper portion 212. One side of) is configured to be connected to the second nozzle 122 formed on the second protrusion 102. And, the lower end of the body 21 is configured in an open form so that the outside air flows in.

In addition, the hot air generating means 22 is a fan 221 installed at the lower end of the body 21, a motor 222 for driving the rotation of the fan 221 while being installed on the top of the fan 221, and the motor Is installed on the top of the 222 is configured to include a soundproof cover 223 for reducing the noise caused by hot air generation. Here, the fan 221 and the motor 222 are mounted in the body 21 in a form inserted into the cylindrical fixture 225. As shown in FIG. 3, the soundproof cover 223 includes first and second circular plates 223a and 223b, and a plurality of holes H in the first and second circular plates 223a and 223b. It is formed and configured. At this time, the first circular plate 223a and the second circular plate 223b are spaced apart from each other by a predetermined distance such that the positions of the holes H are opposed to each other, so that the motor 222 is rotated by the rotation of the fan 221. This is to forcibly rotate the path of hot wind moving upward through) to reduce the noise caused by the movement of hot wind.

Meanwhile, the control module 30 installed inside the main body 10 is applied from the sensor driving block 31 and the sensor driving block 31 for driving control of the sensor 13 as shown in FIG. 4. A motor drive block 32 for driving control of the motor 222 based on the information, a display control block 33 for display control of the display means 14, and a power control block for supplying power to each device ( 34).

The sensor drive block 31 determines that a user's hand is input to the hand input unit 11 when a high level detection signal is not received from the infrared receiver 132, for example, and transmits a predetermined operation control signal to the motor drive. When the detection signal is received from the infrared receiver 132 while the high level detection signal is not received and is sent to the block 32, the display control block 33, and the power control block 34, the predetermined driving stop signal is transmitted. Is sent to the motor drive block 32 and the display control block 33.

The motor driving block 32 drives the motor 222 based on the operation control signal applied from the sensor driving block 31. The motor driving block 32 controls to block driving of the motor 222 when a driving stop signal is applied from the sensor driving block 31 while the motor 222 is being driven.

The display control block 33 drives the display means 14 to emit light based on the operation control signal applied from the sensor drive block 31. At this time, the display means 14 may be composed of a plurality of LEDs, the display control block 33 is a plurality of motor speeds corresponding to the motor speed based on the motor speed information provided from the motor drive block 32. LEDs are sequentially driven to emit light, thereby controlling the number of LEDs to be gradually driven. In addition, the display control block 33 drives all of the LEDs based on the reception of the operation control signal applied from the power control block 34, and then sequentially flashes the LEDs one by one at intervals of 1 to 1.5 seconds. Control.

5 is a view for explaining the configuration of the motor drive block (32). That is, as shown in FIG. 5, the motor driving block 32 includes a motor driving unit 321, a speed converter 322, and a speed controller 323. The motor driving unit 321 is configured to be coupled to the power supply unit P for providing AC power of 100 ~ 300V, the motor 222 and the speed converter 322. The motor driving unit 321 provides the AC voltage to the input terminal of the speed converter 322 when a predetermined level of AC power, that is, an AC voltage is applied from the power supply unit P, and is applied from the output terminal of the speed converter 322. The converted second level voltage is provided to the motor 222. In other words, by adjusting the AC voltage level, the power consumed by the load can be adjusted regardless of the load. In this case, the speed changing unit 322 is formed of a plurality of _{(322 1, 322 2, ...} 322 N), it consists of mutually coupled in parallel. In addition, the speed converter 322 is coupled to the switch (SW ₁ , SW ₂ , ... SW _N ) and the resistor (R ₁ , R ₂ , ..., R _N ) in a one-to-one correspondence. In this case, as shown in FIG. 6, the switch may include a photodiode including a light receiving element TR coupled with the motor driving unit 321 and a light emitting element D coupled with the speed controller 323.

That is, the speed converter 322 is provided to the motor driver 321 by changing the voltage of the power applied from the motor driver 321 corresponding to the resistance value based on the control signal of the speed controller 323. FIG. 7 illustrates a change in output voltage according to the resistance value of the speed converter 322. In FIG. 7, an area corresponding to “A” represents a voltage that a load can consume, and an area corresponding to “B”. Represents the voltage that is clipped and removed according to the magnitude of the resistance value. In more detail, the speed controller 323 controls the switch ON / OFF state in the speed converter 322 to change the total output power delivered to the load by the corresponding resistance value. Let's go. For example, in a state in which the resistors R ₁ , R ₂ ,..., R _{N of the} speed converter 322 are coupled in parallel, the speed controller 323 is configured to switch all switches SW ₁ connected in parallel at the initial stage of driving of the motor. The ON / OFF state of ˜SW _N ) is combined at regular time intervals. In addition, the value of the resistance of the speed conversion section 322 in FIG. 8 are R _1> R ₂ ... Assuming> R _N , the speed controller 323 may control the N (M = N) stages by controlling the switch SW ₁ to be sequentially turned on from the switch SW ₁ to the switch SW _N at regular intervals. have. If the values of the resistors have arbitrary values, the speed of the M stage can be controlled by combining ON states of the switches and controlling them from the maximum resistance value to the minimum resistance value at regular time intervals (T interval). have.

In addition, the speed controller 323 provides the speed control information to the display control block 33 so that the speed information is displayed and output through the LED.

Next, the operation of the hand dryer having the above configuration will be described.

First, when a user inputs a hand into the hand input unit 11, the sensor 13 detects this and provides it to the control module 30, and the control module 30 drives the high output / high speed motor 222 based on this. Let's go. That is, the power control block 34 of the control module 30 provides a predetermined power to each device. Then, when a predetermined level of power is supplied to the power supply unit P by the control of the power control block 34, the power supply level is supplied through the motor driving unit 321 and the speed converter 322 in the motor driving block 32. By being converted and applied again to the motor 222 through the motor driving unit 321, the motor 222 is rotated at a speed corresponding to the power level. For example, the speed converter 322 changes the output resistance value based on a control signal applied from the speed controller 323 of the motor driving block 32. At this time, the speed converter 3220 changes the output power value so that the motor 222 changes from low speed to high speed.

When the motor 222 is driven, the fan 221 coupled to the lower side of the motor 222 is rotated strongly and the center of the fan 221 is in a vacuum state. When the central portion of the fan 221 is in a vacuum state, external air flows into the main body 10 due to a pressure difference from the outside.

In addition, the outside air introduced into the main body 10 is discharged to the hand input part 11 through the nozzle 12 via the fan 221, the motor 222, and the soundproof cover 223. That is, the outside air introduced into the main body 10 is heated to a predetermined temperature by the heat generated by the motor 222 and then discharged to the hand input unit 11 through the nozzle 12.

In addition, the control module 30 drives the motor 222 and displays the driving speed and the remaining time information of the current hand dryer through the display means 14.

That is, according to the embodiment, in the hand dryer to dry the user's wet hands through the hot air by compressing the outside air to the inside by compressing the inside, the hot air by introducing the outside air when the hand dryer is driven By controlling the drive of the motor to change from a low speed to a high speed, it is possible to minimize the user's hearing discomfort due to sudden noise due to the motor drive.

Therefore, the user can use the hand dryer with a more comfortable mood.

On the other hand, the present invention is not limited to the above embodiments and can be variously modified within the scope without departing from the technical spirit of the present invention.

As described above, according to the present invention, by controlling the drive of the motor to generate hot air by introducing external air from a low speed to a high speed, the user is minimized by the user's hearing discomfort due to the sudden noise caused by the motor drive. It becomes possible to use a hand dryer with a more comfortable feeling.

Claims (5)

In a hand dryer which drives a motor provided in the main body to introduce external air into the main body, generates hot air using external air in the main body, and then discharges the hot air to the outside to dry the user's hand. A speed converter for changing an output power provided to the motor by changing a level of an input power, and through the speed converter Initially, the motor drive is provided with a motor drive means including a speed control unit for performing the speed control of the M stage to rotate from low speed to high speed, The speed conversion unit is a hand dryer, characterized in that the combination of the N switch and the N resistors for controlling the output of the power based on the control signal applied from the speed control unit in a one-to-one correspondence form. The method of claim 1, N resistors of the speed converter are configured in parallel coupling, The speed control unit adjusts the voltage value output from the speed conversion unit by combining each switch on / off state at a predetermined time interval, and controls the output power to gradually increase. Hand dryer. The method of claim 1, remind N resistors in the speed converter are configured in parallel The speed control unit is a hand dryer, characterized in that for the initial driving of the motor control the combination of the state of all switches at a predetermined time interval to have a minimum resistance value from the maximum resistance value. The method according to any one of claims 1 to 3, The speed control unit is a hand dryer, characterized in that for controlling the switch (ON) / off (OFF) to have a rotational speed of the motor corresponding to the information set by the user. The method according to any one of claims 1 to 3, The switch is a hand dryer, characterized in that consisting of a photodiode.

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