TWI548383B - Hand drying device - Google Patents

Description

Hand dryer

The present invention relates to a hand dryer for drying a wet hand after washing.

Conventionally, instead of wiping a wet hand after washing with a towel or a hankerchief, a hand drying device that inserts a wet hand into a hand insertion portion (hand drying chamber) is used, and A high velocity air stream is sprayed onto the inserted hand, blowing off the water attached to the hand, leaving the hand dry.

Patent Document 1 discloses a hand drying device including: an electric blower that blows air; a drying chamber that turns a hand inserted from above substantially into a dry state; and a discharge hole that is sprayed and disposed in a drying chamber. The air supply airflow of the electric blower on the inner surface; the air supply air passage is configured to connect the air supply side of the electric blower with the discharge hole; the outer profile covers the electric blower and the air supply air path, and forms the appearance of the body; and a power switch; And configure the power switch to be below or behind the body setting state.

[Prior patent documents] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2001-327433

In the hand drying device disclosed in Patent Document 1, the power switch is disposed on the lower or the rear side of the main body installation state, and water is dripped directly to the power source for watering the machine assumed when the space is set in the cleaning body. A hand dryer that achieves high safety by preventing water from entering the switch.

However, the hand drying device disclosed in Patent Document 1 is a hand-detecting sensor in the case of wiping the hand insertion portion because it is not easy to operate the power switch disposed under the main body or the back side during cleaning. Detective sensor) The reaction starts, and the problem is difficult to clean.

Moreover, the power switch is disposed under the main body or the back of the main body, and water may be dripped due to the rebound of the water from the ground. When the power switch is disposed on the back of the main body, the water is sprinkled to the body. The situation around the casing or the droplets generated when the hand is dry may leak water from the gap with the wall surface, and it cannot be said that the intrusion of water can be reliably prevented.

The present invention has been made in view of the above problems, and an object thereof is to provide a hand drying device which can be easily opened and closed during cleaning, and which is scattered around the periphery of the operation portion, and water is hard to intrude.

In order to solve the above problems and achieve the object, the present invention is a hand drying device comprising: a casing, a nozzle that has been inserted into a hand insertion portion of a user and a hand insertion portion; The air flow generating device is disposed inside the casing; and the hand detecting sensor detects that the user's hand has been inserted into the hand insertion portion; the hand detecting sensor detects the user's hand In any case, the air flow generated by the compressed air flow generating device is sprayed from the nozzle to the hand insertion portion; and is characterized in that it has an operation portion, and the operation portion includes cutting Switching between the operable state and the suspended state of the device; the open relationship is configured to include a control panel and a plurality of electrodes disposed outside the position of the casing below the hand insertion portion The electrode is disposed on the back side of the operation panel, and detects the electrostatic capacitance mode of the operation according to the change in the electrostatic capacitance generated by the electrode by the user's finger contacting the operation panel.

Since the hand drying device of the present invention can be easily opened and closed during cleaning, and the opening of the operation portion is in the electrostatic capacitance mode, it is possible to infiltrate water even if water droplets are scattered to the periphery of the operation portion.

1, 40‧‧‧ hand dryer

2‧‧‧Shell

3, 42‧‧‧Hand insertion department

3a‧‧‧ front wall

3b‧‧‧Back wall

3c‧‧‧ bottom wall

4‧‧‧High-pressure air flow generating device

5a‧‧‧ front wall nozzle

5b‧‧‧Back wall nozzle

8a‧‧‧Upside hand detection sensor

8b‧‧‧Deep side hand detection sensor

8c‧‧‧Hand Detection Sensor

9‧‧‧ openings

10‧‧‧Exhaust chamber

11‧‧‧Exhaust port

12‧‧‧Electric heater

13a‧‧‧ front exhaust pipe

13b‧‧‧ rear exhaust pipe

14‧‧‧ suction pipe

15‧‧‧ suction port

16‧‧‧Air filter

17‧‧‧Drainage road

18‧‧‧Drainage trough

19‧‧‧ front panel

21‧‧‧Operator panel

22a‧‧‧Open switch

22b‧‧‧Air volume adjustment switch

22c‧‧‧heater switch

22d‧‧‧Key lock switch

23‧‧‧ Display Department

23a ₁ , 23a ₂ , 23b ₁ , 23b ₂ , 23b ₃ , 23b ₄ , 23b ₅ , 23c , 23d , 23e‧‧‧ LED lights

24‧‧‧Electrode (electrode)

25‧‧‧ Conductive rubber

26‧‧‧Electrode control circuit

31‧‧‧Control Department

31a‧‧‧Control circuit

31b‧‧‧ Shell

31c‧‧‧ Cover

31d‧‧‧heatsink

41‧‧‧Power switch

100‧‧‧Disassembly

Fig. 1 is a perspective view of a hand dryer according to a first embodiment of the hand dryer of the present invention as seen from one side.

Fig. 2 is a side sectional view showing the hand dryer of the first embodiment.

Fig. 3 is a partial perspective view of the hand dryer in which the operation panel is placed on the side of the casing.

Figure 4 is a detailed view of the operation panel.

Fig. 5 is a schematic view showing the configuration of the periphery of the operation panel.

Fig. 6 is a perspective view showing the configuration of a hand dryer in which a power switch is provided on the back side.

Fig. 7 is a side cross-sectional view showing the hand dryer of the second embodiment of the hand dryer according to the present invention.

Hereinafter, embodiments of the hand dryer according to the present invention will be described in detail based on the drawings. Further, the present invention is not limited by the embodiment.

First embodiment

Fig. 1 is a perspective view of the hand dryer according to the first embodiment of the hand dryer of the present invention as seen from one side. Fig. 2 is a side sectional view showing the hand dryer of the first embodiment.

As shown in Fig. 1, the hand dryer 1 is provided with the opening portion 9 in the casing 2 constituting the outer periphery of the hand dryer 1. The opening portion 9 is a user of the hand dryer 1 for inserting the insertion opening of the hand into the casing 2. As shown in FIG. 2, the hand insertion portion 3 that covers the space of the hand of the hand dryer 1 inserted from the opening portion 9 is provided in the upper portion of the casing 2. The hand insertion portion 3 can be freely inserted into the user's hand from the up-down direction or the left-right direction. The hand insertion portion 3 is formed in a U-shape in a cross section in a side view, and is gradually inclined slightly from the front side toward the back side as it goes from the upper portion to the lower portion of the hand insertion portion 3.

As described above, the hand insertion portion 3 is formed in a U-shaped cross section, and the front wall 3a of the inner wall on the front side faces the rear wall 3b of the inner wall on the back side. Further, the front wall 3a and the rear wall 3b are connected at their lowermost portions by the bottom wall 3c of the inner wall on the bottom side. In this manner, the hand insertion portion 3 is in a side view, forming a bottomed U-shape having a bottom portion of the upper opening. Further, as shown in Fig. 1, both side faces of the hand insertion portion 3 in the width direction are opened.

In this manner, the lower portion of the hand insertion portion 3 is a space surrounded by the front wall 3a, the rear wall 3b, and the bottom wall 3c. Further, the upper portion of the hand insertion portion 3 is opposed to the front wall 3a and the rear wall 3b, and the space in which both side surfaces are open is inserted into the hand insertion portion 3 from the outside of the casing 2 to the user's hand.

Further, the front wall 3a, the rear wall 3b, and the bottom wall 3c are formed of a resin impregnated with an antibacterial agent. Further, on the surfaces of the front wall 3a, the rear wall 3b, and the bottom wall 3c, water-repellent coating such as silicon or fluorine, or hydrophilicity such as titanium oxide is applied. Hydrophilic coating. Therefore, the adhesion of the dirt to the front wall 3a, the rear wall 3b, and the bottom wall 3c of the hand insertion portion 3 is suppressed, and the growth of the bacteria can be reduced.

In the hand insertion portion 3, a front wall nozzle 5a is provided in the vicinity of the opening portion 9 of the upper portion of the front wall 3a before the air is ejected, and a rear wall nozzle 5b is disposed at the upper portion of the rear wall 3b after the air is ejected. The vicinity of the opening portion 9. The front wall nozzle 5a and the rear wall nozzle 5b are opposed to each other. The front wall nozzle 5a and the rear wall nozzle 5b are a plurality of opening holes arranged in a substantially straight line in the width direction, and each of the opening holes is in a slit shape extending in a wavy manner in the front view in the front view. Further, the front wall nozzle 5a and the rear wall nozzle 5b are inclined at a slightly lower end than the horizontal direction, and the air ejected from the front wall nozzle 5a and the rear wall nozzle 5b is directed toward the lower portion (the deep side) of the hand insertion portion 3. Spray angle.

The front wall 3a is disposed at a position closer to the opening portion 9 than the front wall nozzle 5a, and is provided with an upper hand detective sensor (light emitting side) 8a, which is disposed on the front wall 3a. A lower hand detective sensor (light-emitting side) 8b for detecting the presence or absence of a hand is provided on the depth side of the hand insertion portion 3. In the rear wall 3b, the hand detecting sensor (light receiving side) 8c is disposed near the center of the upper hand detecting sensor 8a and the deep side hand detecting sensor 8b, and each upper side hand detecting sensor The 8a and the deep side hand detecting sensor 8b constitute a transmissive sensor paired with the hand detecting sensor 8c, and the above side hand detecting sensor 8a or the deep side hand detecting sensor 8b The infrared light that is illuminated is The hand inserted in the hand insertion portion 3 is shielded to detect the presence or absence of the hand.

A drain port (not shown) that discharges water from the hand insertion portion 3 is provided at an end portion in the width direction of the bottom wall 3c that constitutes the bottom surface of the hand insertion portion 3. The upper end portion of the drain passage 17 extending in the vertical direction of the casing 2 is attached to the drain port. A drain tank 18 is connected to the lower end portion of the drain passage 17. The drain tank 18 is a water tank that stores water discharged through the drain path 17, and is detachably attached to the bottom of the casing 2. The drainage groove 18 has a shape in which the cross-sectional area of the horizontal projection surface is the largest.

Inside the casing 2, as shown in Fig. 2, a high-pressure airflow generating device 4 that generates high-pressure air is disposed below the hand insertion portion 3. Further, the air that is pressurized by the high-pressure airflow generating device 4 is discharged to an exhaust chamber 10 provided above the high-pressure airflow generating device 4. The exhaust chamber 10 surrounds the exhaust side of the high-pressure air flow generating device 4. An exhaust port 11 for exhausting air in the exhaust chamber 10 is provided at an upper portion of the exhaust chamber 10 for heating the high-pressure air heated to the exhaust chamber 10 after the high-pressure air flow generating device 4 is generated. An electric heater 12 is provided at the exhaust port 11. The exhaust port 11 is connected to a front exhaust duct 13a and a rear exhaust duct 13b which are branched to the front side and the rear side of the casing 2. The front exhaust pipe 13a extends from the exhaust port 11 to the upper side than the front wall 3a of the hand insertion portion 3, and the rear exhaust pipe 13b passes through the rear side of the rear wall 3b of the hand insertion portion 3, one side. It extends from the exhaust port 11 to the upper side.

The front exhaust pipe 13a is connected to the front wall nozzle 5a provided on the front wall 3a at the upper end portion, and the rear exhaust pipe 13b is connected to the wall nozzle 5b provided on the rear wall 3b at the upper end portion. Thereby, the high-pressure air discharged from the high-pressure airflow generating device 4 passes through the exhaust chamber 10, the exhaust port 11, and the front exhaust pipe 13a, and After the front wall nozzle 5a is converted into high-speed air, the high-speed air is ejected from the front wall nozzle 5a into the hand insertion portion 3. Further, the high-pressure air discharged from the high-pressure airflow generating device 4 passes through the exhaust chamber 10, the exhaust port 11, and the rear exhaust pipe 13b, and is converted into high-speed air by the rear wall nozzle 5b, and then is filtered from the rear wall nozzle 5b. This high speed air is ejected into the hand insertion portion 3.

On the intake side of the high-pressure airflow generating device 4, an upper end portion of an air intake duct 14 extending in the vertical direction of the casing 2 is connected to the high-pressure airflow generating device 4. In order to reduce the noise generated from the high-pressure air flow generating device 4, the sound absorbing material 20 is adhered to the inner wall of the air suction pipe 14. Further, the intake pipe 14 extends to the bottom of the casing 2, and the lower end portion of the intake pipe 14 is connected to the intake port 15 opened below at the bottom of the casing 2. Further, an air filter 16 is detachably attached to the inlet of the intake port 15. Further, the front panel 19 is attached to the front surface of the casing 2, and an operation panel 21 for switching the operation state of the hand dryer 1 is provided at a portion above the front flange 18 of the front panel 19.

Next, the control unit 31 of the hand dryer 1 will be described. Inside the casing 2, the control unit 31 is provided below the high-pressure airflow generating device 4. The control unit 31 includes a control circuit 31a that controls the operation of the high-pressure airflow generation device 4 and the electric heater 12, a case 31b that houses the control circuit 31a, and a cover 31c and a heat sink 31d that protect the control circuit 31a. .

In the control circuit 31a, a relatively large electronic component such as a switching device such as an FET (Field Effect Transistor) element or an IGBT (Insulated Gate Bipolar Transistor) element, or an electrolytic capacitor is used. The switching element on the control circuit 31a is driven When the high-pressure air flow generating device 4 generates heat, heat generated is required to dissipate heat to suppress malfunction. The heat sink 31d is generally provided to dissipate heat generated by the switching element. In the present embodiment, the heat sink 31d is also in close contact with the switching element in the control circuit 31a of the high-pressure airflow generating device 4. Further, the radiator 31d is inserted into the intake duct 14, whereby the radiator 31d is cooled by the air flow flowing through the intake duct 14 when the high-pressure airflow generating device 4 operates. Further, the heat sink 31d is made of aluminum having good thermal conductivity and formed into a fin shape.

The control unit 31 detects the sensor (light emitting side) 8a, the depth side hand detecting sensor 8b, and the hand detectr from the hand side insertion portion 3 for detecting the presence or absence of the hand in the hand insertion portion 3. The signal output from the sensor 8c is measured to control the operation of the high-pressure air flow generating device 4. Then, the air flow generated by the high-pressure airflow generating device 4 is ejected into the hand insertion portion 3 from the front wall 3a and the rear wall nozzle 5b of the front wall 3a and the rear wall 3b from the inner wall of the hand insertion portion 3.

Next, the operation of the hand dryer 1 will be described. The user of the hand dryer 1 stands on the front side of the hand dryer 1, and inserts a wet hand into the hand insertion portion 3 from the opening portion 9 provided at the upper portion of the hand dryer 1. Then, the hand is gradually moved into the lower portion (depth side) of the hand insertion portion 3, and when the infrared ray emitted from the hand detector 8b is blocked by the fingertip of the inserted hand or the like, the control circuit 31a is not shown. The micro controller determines that the hand has been inserted into the hand insertion portion 3. Thereby, the microcontroller outputs an instruction to start the operation of the high-pressure air flow generating device 4. When the high-pressure airflow generating device 4 is operated, air outside the dust is removed from the intake port 15 by the air filter 16, and the air is sucked into the intake pipe 14 and sucked into the high-pressure airflow generating device 4. side. High pressure air The flow generating device 4 generates high-pressure air from the air taken in in this manner.

The high-pressure air pressurized by the high-pressure airflow generating device 4 is exhausted from the exhaust side of the high-pressure airflow generating device 4 into the exhaust chamber 10. At that time, in the case where the heater switch described later is on, a part of the high-pressure air is heated by passing through the electric heater 12. Then, the high-pressure air heated by the electric heater 12 is mixed with the high-pressure air that has not been heated by the exhaust port 11 where the electric heater 12 is not provided, and is branched to the front exhaust pipe 13a and the rear exhaust pipe. 13b and circulation. The high-pressure air of the warm air that is branched and branched to the front exhaust pipe 13a and the rear exhaust pipe 13b is converted from the high-pressure air by the front wall nozzle 5a provided on the front wall 3a and the rear wall nozzle 5b provided on the rear wall 3b. Into high speed air. Then, this warm air high-pressure air is ejected from the front wall nozzle 5a and the rear wall nozzle 5b into the hand insertion portion 3.

Since the front wall nozzle 5a and the rear wall nozzle 5b are disposed in a substantially linear shape in the width direction of the hand insertion portion 3 in the vicinity of the opening portion 9, the front wall nozzle 5a and the rear wall nozzle 5b are ejected in the hand insertion portion 3 in the vicinity of the opening portion 9. High-speed air in the form of an air curtain extending in the width direction. The air curtain-like high-speed air collides with the wrist of the user inserted in the hand insertion portion 3 or both the back of the hand and the palm of the hand near the wrist, and the water attached to the front and back of the hand becomes a water droplet and is blown off.

At that time, the discharge directions of the front wall nozzle 5a and the rear wall nozzle 5b are inclined slightly downward from the horizontal direction and toward the depth side of the hand insertion portion 3. Therefore, the high-speed air ejected from the front wall nozzle 5a and the rear wall nozzle 5b is also ejected toward the depth side of the hand insertion portion 3 in a direction slightly inclined downward from the horizontal direction. In other words, the high-speed air is not perpendicular to the opponent, but is oriented toward the fingertip. (downward) oblique angle collision. Therefore, most of the high-speed air ejected from the front wall nozzle 5a and the rear wall nozzle 5b is behind the collision hand, and flows along the hand from the wrist toward the fingertip, and most of the water adhering to the hand is also along the hand from the wrist toward the finger. Flow in the direction of the tip. Then, the water reaching the fingertip is in the vicinity of the bottom of the hand insertion portion 3, and is peeled off from the fingertip to become a water drop, and most of the water is directed downward, that is, the bottom wall 3c of the hand insertion portion 3 is blown off.

The water droplets which are blown off from the wet hand hit the front wall 3a, the rear wall 3b or the bottom wall 3c of the hand insertion portion 3. Further, the water droplets that hit the front wall 3a and the rear wall 3b flow down toward the bottom wall 3c which is the bottom of the hand insertion portion 3, and pass through the drainage path from a drain port (not shown) provided in the bottom wall 3c of the hand insertion portion 3. After 17, it is recovered by the drain tank 18.

When the hand of the user is withdrawn from the hand insertion portion 3, and the light emitted from the upper hand detecting sensor (light emitting side) 8a reaches the hand detecting sensor 8c, the control circuit 31a stops the high pressure air flow generating device 4.

Next, the operation panel 21 of the hand dryer 1 will be described in detail. As shown in Fig. 1, in the casing 2, a portion of the front panel 19 that is lower than the hand drying chamber and above the drain tank 18 is provided with the operation panel 21 that switches the operation state of the hand dryer 1 to It can be exposed from the outside. The drain groove 18 is inserted into a concave dismounting opening 100 provided in the casing 2 and fixed. The operation panel 21 is provided in the vicinity of the detachable port 100.

Further, in the present embodiment, the operation panel 21 is provided on the front surface of the casing 2, but it may be provided on the side surface of the casing 2. Fig. 3 is a partial perspective view of the hand dryer in which the operation panel is placed on the side of the casing.

Figure 4 is a detailed view of the operation panel. Change the hand dryer 1 The plurality of switches 22a to 22d that are set are provided on the operation panel 21. Specifically, an on-off switch 22a, an air volume control switch 22b, a heater switch 22c, and a key lock switch 22d are provided on the operation panel 21. .

The opening and closing switch 22a is a switch that switches the operable state and the suspended state of the hand dryer 1. When the open switch 22a is in the "on" state, the hand dryer 1 is in an operable state, in response to the upper hand detection sensor 8a, the deep side hand detection sensor 8b, and the hand detection sensor 8c. The detection of the opponent, the high-pressure air flow generating device 4 operates. On the other hand, when the opening/closing switch 22a is in the "closed" state, the hand dryer 1 is in the pause state, and even if the hand is inserted into the hand insertion portion 3, the high-pressure airflow generating device 4 does not operate. Therefore, the opening and closing switch 22a switches the operable state and the suspended state of the hand dryer 1.

Specifically, by switching the on-off switch 22a to the "off" state corresponding to the off (off), the signal is transmitted to the relay located in the control circuit 31a, because the contacts of the relay are separated and the pair is closed. Since the power supply of the high-pressure airflow generating device 4 is supplied, the power supply to the control circuit 31a is turned off, but the hand dryer 1 is in a suspended state in which it cannot be used. The hand dryer 1 in the pause state is like a state in which the power source is turned off. By switching the on-off switch 22a to the "on" state corresponding to the on-on, the signal is transmitted to the relay located in the control circuit 31a, and the high-pressure airflow generating means 4 is supplied with power because the contact of the relay is closed. Therefore, the hand dryer 1 is in an operable state that can be used. The hand dryer 1 in an operable state is like a state in which the power source is turned on.

In addition, the high-pressure air flow generating device 4 may not be mounted. The relay of the power supply is turned on and off, and the upper hand detecting sensor 8a, the deep side hand detecting sensor 8b, and the hand detecting sensor are turned on when the opening and closing switch 22a is in the "off" state. The detection of the 8c opponent is invalid, and even if the hand is inserted into the hand insertion portion 3, the high-pressure airflow generating device 4 does not operate, and the hand dryer 1 is placed in the suspended state.

The air volume adjustment switch 22b is a switch that adjusts the air volume when the high-pressure airflow generation device 4 operates. The heater switch 22c switches the opening and closing switches of the electric heater 12. Further, above the various switches, a display unit 23 that is in the state of the LED (Light Emitting Diode) display device (in the setting state of each switch) is provided.

On the display unit 23, LED lamps for instructing each of the states set by the opening and closing switch 22a, the air volume adjusting switch 22b, and the heater switch 22c are provided above each of the opening and closing switch 22a, the air volume adjusting switch 22b, and the heater switch 22c. (lamp) 23a ₁ to 23d and the LED lamp 23e informing that the drain tank 18 is in a state of being full of water. When the turn-off switch 22a is turned on, the LED lamps 23a ₁ and 23a ₂ are respectively disposed so as to correspond to the display characters of "on" and "off", and the lights are turned on by the respective LED lamps 23a ₁ and 23a _{2 to} notify that the operation becomes The state of being turned on or the state of being turned off. Further, five LED lamps 23b ₁ to 23b ₅ are disposed above the air volume adjusting switch 22b so as to be arranged in a horizontal row, and the amount of air blown from the air blowing port is notified, and the air volume is notified by lighting from the left. Big.

Further, an LED lamp 23c is provided above the heater switch 22c, and the electric heater 12 that heats the air blown from the air outlet is turned "on", and the electric heater 12 is turned "off". The condition is turned off, and the electric heater 12 is notified of the on-off state. Also, the key lock switch 22d The LED lamp 23d is provided above, and the key lock is set when the key is locked, and the light is turned off when the key is not locked, and the key lock setting state is displayed.

In a capacitance switch, since the electrostatic capacitance changes depending on the contact area of the finger, the electrostatic capacitance changes by making the finger reliably contact, but gently contacts or contacts the end of the electrostatic capacitance switch. At the time, the change in electrostatic capacitance becomes small. Further, when the capacitance switch or the conductor such as water contacts the contact, the electrostatic capacitance changes as in the case of contact with a finger. In the case of small water droplets, the change in electrostatic capacitance is small, but in the case where water droplets as large as the body pass over the electrostatic capacitance switch, the change in electrostatic capacitance becomes slightly larger.

Here, in order to prevent detection errors caused by the adhesion of water, if the threshold value of the switch detection is set to be high, since the touch is not detected when the switch is touched, the operational feeling is deteriorated. On the other hand, if the threshold value is set to be low, a detection error occurs when a finger is in contact with a large water droplet. Moreover, in the case of a large water droplet along the body, since it does not stay on the electrostatic capacitance switch and is removed in a short time, it can be detected by a situation in which the change exceeding the threshold value continues for a fixed time or longer. Prevent detection errors, but it is necessary to pre-contact the electrostatic capacitance switch for more than a fixed time during operation. In the case where the air volume adjustment switch 22b or the like needs to be operated for a plurality of times, the operability is deteriorated because the operation time per time becomes long.

Therefore, in the hand dryer 1, the time required for the contact to the acceptance operation is changed in accordance with the function of the operated switch. The switching of the opening and closing switch 22a, the air volume adjusting switch 22b and the heater switch 22c, and the time required for the key lock setting of the key lock switch 22d are the same, but only the key is unlocked. When the key is unlocked, the required time is lengthened, for example, if the contact is not continued for about 2 seconds or more, the operation is not accepted. In this way, it is possible to maintain good operability as much as possible, and it is possible to prevent malfunction caused by the flow of water droplets.

Next, an outline of the operation will be described. And opening operation of the panel 21 closes the switch 22a is "off" corresponding to the state of the red LED lamp 23a lighting system ₁ of a hand dryer operation stopped state. First, when the finger contacts turn off switch 22a, 22a open and close the switch operation, the operation is turned on, the lighting 23a ₂ corresponds to the "Open" of the LED light, and corresponds to "close" the red LED-based lamp lights 23a _1. When the operation is turned on, the hand dryer 1 becomes a standby state that can be used at any time. Therefore, if the wet hand is inserted into the hand insertion portion 3, the upper hand detection sensor 8a, the deep side hand detection sensor 8b, and the hand detection sensor 8c detect the hand, so that the high pressure air flow generating device 4 When the air is blown from the front wall 5a and the rear wall 5b, the hand can be made dry.

Further, when the operation is turned on, the LED lamps 23b ₁ to 23b ₅ corresponding to the air volume adjusting switch 22b, the LED lamp 23c corresponding to the heater switch 22c, and the LED lamp 23d corresponding to the key lock switch 22d are fitted at that point in time. The setting status is still lit or turned off, and each setting status is notified. When the operation state of the contact opening operation of the open panel 21 closes the switch 22a, power off the hand dryer 1, the display unit 23 to correspond to "close" the lighting of the LED lamp 23a _1, and corresponds to the "On"LED's The lamp 23a _{2 is} turned off, and the LED lamps 23b ₁ to 23b ₅ corresponding to the air volume adjusting switch 22b, the LED lamp 23c corresponding to the heater switch 22c, and the LED lamp 23d corresponding to the key lock switch 22d are all turned off.

The air volume adjustment switch 22b, the heater switch 22c, and the key lock switch 22d of the operation panel 21 can be accepted only in the state where the operation is turned on. When the air volume adjustment switch 22b is touched in the state in which the operation is turned on, the amount of air is increased step by step for each contact, and the corresponding LED lamps 23b ₁ to 23b _{5 are} sequentially turned on from the left. The air volume is set to 5 segments, and the five LED lamps 23b ₁ to 23b ₅ arranged in the horizontal direction are all set to the maximum air volume. When the air volume adjustment switch 22b is operated once again in the state of being set to the maximum air volume, the minimum air volume is returned, and only the left end LED lamps 23b ₁ of the five LED lamps 23b ₁ to 23b ₅ arranged in the horizontal direction are lit, and the remaining LED lamps are turned on. 23b ₂ , 23b ₃ , 23b ₄ , 23b ₅ are turned off.

When the heater switch 22c is touched in the state in which the operation is turned on, the "on" and "off" of the electric heater 12 can be switched. If the heater is in the "on" setting state, the electric heater 12 operates, and the corresponding LED lamp 23c Light up. If the heater is in the "off" setting state, the electric heater 12 does not operate, and the corresponding LED lamp 23c is turned off. The switching of the opening and closing of the heater repeats "on" and "off" in sequence each time the heater switch 22c is touched.

When the key lock switch 22d is touched in the state in which the operation is turned on, the setting of the key lock can be switched. When the key is locked, the corresponding LED lamp 23d blinks, and the corresponding LED lamp 23d is turned off when the key is not locked. When the key lock switch 22d is touched in a state where the key lock is not set, the key lock is set, and when the key lock switch 22d is touched while the set key is locked, the key lock is released.

When the setting key is locked, it is prohibited to accept the operation of the opening/closing switch 22a, the air volume adjusting switch 22b, and the heater switch 22c of the operation panel 21 as the operation switch. Therefore, in the state in which the key is locked, the finger contacts the opening/closing switch 22a, the air volume adjusting switch 22b, and the heater switch 22c. A switch and the operating system are not accepted, and the settings cannot be changed or switched.

Fig. 5 is a schematic view showing the configuration of the periphery of the operation panel. An electrode portion (electrode) 24 that captures a change in electrostatic capacitance is disposed on the inside of the operation panel 21 that is a part of the front panel 19, and an opening/closing switch 22a, an air volume adjustment switch 22b, a heater switch 22c, and a key lock switch 22d. Each of the corresponding positions is provided between the inner wall surface of the operation panel 21 and the electrode portion 24 as an electrically conductive elastic body for preventing the inner side surface of the front panel 19 from being in close contact with the electrode portion 24 by preventing the intervention of the air layer. Conductive rubber 25. The electrode portion 24 is connected to the control circuit 31a of the control unit 31, and the change in the capacitance generated in the electrode portion 24 is detected by the control circuit 31a. The electrode portion 24 may be formed of a printed board on which a copper foil is printed on a substrate, or may be an electrode plate made of a metal plate.

In this configuration, when the cleaner or the manager touches the various switches of the operation panel 21, the microcontroller of the control circuit 31a detects the change in the electrostatic capacitance generated in the electrode portion 24, and implements various types of The processing of the contents of the switch.

For example, when the cleaner cleans the hand dryer 1, when the closing switch 22a is pressed (contacted), the electrostatic capacitance of the electrode portion 24 changes via the operation panel 21 and the conductive rubber 25. In the control circuit 31a located in the control unit 31, the electrostatic capacitance value of the electrode portion 24 is monitored, and when the preset value is detected or less, it is judged that the open switch 22a has been operated, before the operation, The detection of the upper side hand detecting sensor 8a, the deep side hand detecting sensor 8b and the hand detecting sensor 8c is invalid, and before the operation, the upper hand detecting sensor 8a , deep side hand detection sensor 8b and hand detection sensing The case where the detection of the device 8c is invalid is set to be valid. Therefore, when the cleaning is turned on, the switch 22a is turned on, and the detection of the upper hand detecting sensor 8a, the deep side hand detecting sensor 8b, and the hand detecting sensor 8c is invalidated. After the cleaning is performed, the switch 22a is turned on once, and the detection of the upper hand detecting sensor 8a, the deep side hand detecting sensor 8b, and the hand detecting sensor 8c becomes effective.

Similarly to the air volume adjusting switch 22b, the control circuit 31a determines that the air volume adjusting switch 22b has been operated, and when the high-pressure airflow generating device 4 operates, the air volume is increased by one step before the air volume adjusting switch 22b is operated. However, it is judged that the air volume adjustment switch 22b is operated in a state where the maximum air volume is set, and the air volume is set to the minimum. In addition, in the fourth figure, the case where the air volume of five stages can be set is mentioned, but the air volume can be adjusted to four or less stages or six or more stages.

The heater switch 22c can also be set to turn on or off the electric heater 12 by performing the same operation.

According to this configuration, in the case of sprinkling water to the periphery of the hand dryer 1, or water droplets due to water droplets, the water droplets adhere to the periphery of the operation panel 21, and also because there is no part of the inside of the operation portion that invades the inside of the product (because the operation panel Since there is no connection to the casing 2 around the 21, there is no possibility of electric shock due to the intrusion of water into the electric circuit or the like, and a safe hand dryer 1 can be realized. Further, the casing 2 is formed of a plastic resin (ABS (Acrylonitrile Butadiene Styrene) having a thickness of about 1 to 3 mm. When the operation portion is operated, the electrode can be internally detected by the finger. Since the change in capacitance is a non-movable portion during operation, there is no problem of durability such as cracks caused by the operation.

In the case of using a mechanical switch, it is necessary to waterproof A cover such as a resilient rubber or a resin sheet is provided, but if the number of uses is increased, cracks may occur and water may enter. In the present embodiment, since a capacitance switch is used, such a problem does not occur.

For comparison, a hand dryer that sets the power switch to the back side will be described. Fig. 6 is a perspective view showing the configuration of a hand dryer in which a power switch is provided on the back side. A power switch 41 that turns on the power to turn off the hand dryer 40 is disposed on the back of the hand dryer 40. When the hand dryer 40 is mounted on the wall surface, since the power switch 41 cannot be easily operated, the cleaner wipes the hand insertion portion 42 while still not turning off the power of the hand dryer 40, and the hand detection sensor detects the insertion of the hand. There are more cases when the operation starts. When the hand dryer 40 is still running, it may be possible to sprinkle the water for cleaning around, or the splash may splash on the cleaner itself, making it difficult to perform the cleaning operation.

On the other hand, in the hand dryer 1 of the present embodiment, since the operation panel 21 is disposed around the drain groove 18 which the cleaner must clean, it is not necessary to find the position where the switch 22a is opened, and the power supply can be prevented from being forgotten. A problem occurs in which water droplets are scattered around.

Further, as shown in Fig. 4, the various switches of the operation panel 21 are arranged in the vicinity of the various switches as means for notifying the setting state of the operation of the switches. As described above, when the control circuit 31a determines that the various switches have been operated, the display unit 23 notifies the operator of the setting state in order to indicate the setting state of the operation, and notifies the operator of the setting state. According to this configuration, the operational feeling during the operation is good, and the setting state can be surely notified to the cleaner.

Further, a key lock switch 22d that activates or deactivates the operation of various switches is provided on the operation panel 21. By locking the key 22d once When the operation is performed for a long time, the operation panel 21 is set to the locked state, and the operations of the other switches (the open/close switch 22a, the air volume adjustment switch 22b, and the heater switch 22c) are not accepted. By setting the operation panel 21 to the locked state, it is possible to prevent the user from being mischievous, and it is possible to prevent the problem that the operation setting of the hand dryer 1 is switched when the periphery of the operation panel 21 is wiped during cleaning. Further, in Fig. 4, it is shown that the press is as long as 2 seconds, but this is entirely an example, and the long time is not limited.

In the locked state, by pressing the key lock switch 22d a long time, the lock state of the operation panel 21 is released, and the acceptance of the operation of the various switches becomes effective, and the manager or the cleaner can change the hand dryer 1 set up.

Further, in the above description, the operations of the various types of switches are enabled or disabled in the operation of the key lock switch 22d. However, as other specifications, after the various switches of the operation panel 21 are operated, the presets may be preset. When the time is not operated, the operation panel 21 is also automatically set to the locked state, and the operations of the various switches are rendered invalid. In this case, by pressing the key lock switch 22d a little longer, the lock state of the operation panel 21 is released, and the operation of the other various switches becomes effective again. By making this specification, it is possible to prevent the setting of the user's mischief when the cleaner or the manager forgets to lock the various switches.

Further, the key lock switch 22d switches the setting and release of the key lock, and the key lock switch 22d displays "key lock", but after operating various switches of the operation panel 21, it is not operated at the preset time. In the case where the operation panel 21 is automatically set to the locked state, since the key lock switch 22d is mainly operated to release the key lock, the solution can also be displayed. In addition to the key lock."

Second embodiment

Fig. 7 is a side cross-sectional view showing the hand dryer of the second embodiment of the hand dryer according to the present invention. The same portions as those in the first embodiment are denoted by the same reference numerals. In addition, the description of the same portions as those of the first embodiment will be omitted, and only the differences will be described below.

In the second embodiment, the electrode control circuit 26 in which the electrode unit 24 and the control unit 31 described in the first embodiment are integrated is disposed on the inner surface of the operation panel 21. In this configuration, since the electrode portion that generates the change in the electrostatic capacitance and the microcontroller of the control portion 31 that handles the change in the electrostatic capacitance are integrated in the substrate, it is possible to avoid the occurrence of static electricity due to the unevenness of the wiring length or the pull wire. The problem of changes in capacitance.

Further, since the electrostatic capacitance can be processed in one of the substrates, it is possible to alleviate the noise in the machine generated by the high-pressure air flow generating device 4 by the radiation noise received by the wiring of the electrode-control portion. influences.

[Industrial Applicability]

As described above, the hand drying device of the present invention is capable of being easily opened and closed during cleaning, and the opening of the operation portion is in an electrostatic capacitance mode. Therefore, even if water droplets are scattered toward the periphery of the operation portion, water is hard to invade. Useful.

1‧‧‧Hand dryer

2‧‧‧Shell

3‧‧‧Hand Insertion

3a‧‧‧ front wall

3b‧‧‧Back wall

3c‧‧‧ bottom wall

4‧‧‧High-pressure air flow generating device

5a‧‧‧ front wall nozzle

5b‧‧‧Back wall nozzle

8a‧‧‧Upside hand detection sensor

8b‧‧‧Deep side hand detection sensor

8c‧‧‧Hand Detection Sensor

9‧‧‧ openings

10‧‧‧Exhaust chamber

11‧‧‧Exhaust port

12‧‧‧Electric heater

13a‧‧‧ front exhaust pipe

13b‧‧‧ rear exhaust pipe

14‧‧‧ suction pipe

15‧‧‧ suction port

16‧‧‧Air filter

17‧‧‧Drainage road

18‧‧‧Drainage trough

19‧‧‧ front panel

20‧‧‧ Sound absorbing materials

21‧‧‧Operator panel

24‧‧‧Electrode

31‧‧‧Control Department

31a‧‧‧Control circuit

31b‧‧‧ Shell

31c‧‧‧ Cover

31d‧‧‧heatsink

Claims (4)

A hand drying device comprising: a casing formed with a nozzle into which a user insertable hand can communicate with the hand insertion portion; a high-pressure air flow generating device disposed inside the casing; and a hand detective The sensor detects that the user's hand has been inserted into the hand insertion portion; and the air flow generated by the high-pressure air flow generating device is detected by the hand detecting sensor detecting the user's hand. Spraying from the nozzle to the hand insertion portion; and having an operation portion including a switch capable of operating and a pause state of the switching device; the open relationship being configured to include an operation panel and a plurality of electrodes, The operation panel is disposed outside the position of the casing below the hand insertion portion, and the electrode is disposed on the back side of the operation panel, and the electrode is at the electrode according to the user's finger contacting the operation panel. a change in electrostatic capacitance generated to detect an electrostatic capacitance mode of operation; a conductive elastic body disposed between the inner surface of the housing and the electrode of the operation panel, and via the guide The elastomeric inner surface of the housing body in close contact with the electrode. The hand drying device of claim 1, wherein the basket system has a drain groove for receiving water droplets blown from the hand of the hand insertion portion; the operation panel is configured to be disassembled from the drain groove The mouth is adjacent. The hand drying device of claim 2, wherein the operation panel is disposed on a front side of the casing. A hand drying device according to any one of claims 1 to 3, wherein a control unit that operates the high-pressure airflow generating device when the hand detecting sensor detects the user's hand; and an electrode control circuit that integrates the electrode and the control portion is disposed in the operation panel surface.