JP2019195365A - Hand drying device - Google Patents

Abstract

To provide a hand drying device that enables detecting an abnormal condition in a product with a simple structure.SOLUTION: A hand drying device 100 includes: a casing 1 with a nozzle 12 for blowing an air flow toward a hand insertion part 3 into which hands can be inserted; a ventilation part; a hand detection sensor 14; a control part for determining hand detection to determine the presence of the hands in a hand insertion part 3 based on a detection result in the hand detection sensor 14, and controlling the drive of the ventilation part based on a determination result of the hand detection; and a vibration sensor 27 for measuring a vibration value being magnitude of vibration in the casing 1. The control part determines the presence of an abnormal condition in the hand drying device 100, based on the vibration value measured by the vibration sensor 27 and a normal range being a range of a normal value of the vibration value at the time when the hand drying device 100 is normal and ventilation part operates, when being determined that the hands are not inserted into the hand insertion part and the ventilation part operates based on the determination result of the hand detection.SELECTED DRAWING: Figure 4

Description

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

  2. Description of the Related Art Conventionally, a hand drying device that dries a hand by applying a working airflow such as warm air or high-speed airflow to a wet hand is known. Patent Document 1 uses the fact that outside air sucked from a suction port receives heat when passing through a fan motor and the temperature of the airflow rises, and measures the airflow blown from the fan motor with a blowout temperature sensor. Discloses a hand dryer for detecting an abnormality of a fan motor.

JP 2010-220918 A

  However, the hand-drying device of Patent Document 1 is not used for a long time and is in a standby state after being driven by a fan motor and when being continuously used by many users. The temperature rise values due to the exhaust heat from the fan motor of the airflow blown from the fan motor are different. For this reason, the hand drying device of Patent Document 1 has a problem in detection accuracy for detecting an abnormality of the fan motor.

  Further, the hand drying device of Patent Document 1 detects only the abnormality of the fan motor using the temperature of the airflow blown from the fan motor as an index, and the function and performance of the entire product due to the abnormality occurring in other parts. It is not possible to detect deterioration or damage.

  And the hand dryer of patent document 1 measures the temperature of external air, when detecting the abnormality of a fan motor based on two types of temperature, the temperature of the airflow blown out from the fan motor, and the temperature of external air. There is a problem that a temperature sensor is required and the structure is complicated.

  The present invention has been made in view of the above, and an object of the present invention is to obtain a hand dryer capable of accurately detecting an abnormality in a product with a simple configuration.

  In order to solve the above-described problems and achieve the object, a hand drying device according to the present invention includes a casing including a nozzle that blows an air flow toward a hand insertion portion into which a hand can be inserted, and an air flow blown from the nozzle. A hand detection sensor that detects a hand in the hand insertion unit based on a detection result in the hand detection sensor and a hand detection sensor that detects a hand in the hand insertion unit. A control unit that controls driving of the blower unit based on the result, and a vibration sensor that measures a vibration value that is a magnitude of vibration in the casing. The hand dryer wipes away moisture adhering to the hand inserted into the hand insertion portion by an air flow ejected from the nozzle. The control unit determines that a hand is not inserted in the hand insertion unit based on the determination result of the hand detection determination, and the vibration value measured by the vibration sensor when the air blowing unit is operating, and the hand drying device Based on the normal value range that is the normal value range of the vibration value when the air blowing unit is operating normally, the presence or absence of abnormality in the hand dryer is determined.

  According to the present invention, there is an effect that a hand dryer capable of accurately detecting an abnormality in a product with a simple configuration can be obtained.

The perspective view which shows the external appearance of the hand dryer concerning Embodiment 1 of this invention. Side view of the hand-drying apparatus concerning Embodiment 1 of this invention. The top view of the hand-drying apparatus concerning Embodiment 1 of this invention. Sectional drawing along the side of the hand dryer concerning Embodiment 1 of this invention It is a plane sectional view of the hand dryer concerning Embodiment 1 of the present invention, and is sectional drawing which met the VV line in Drawing 2 The perspective view which shows the external appearance of the state which opened the cover of the hand-drying apparatus concerning Embodiment 1 of this invention. The perspective view which shows the external appearance of the hand dryer of the state which opened the cover of the hand dryer concerning Embodiment 1 of this invention, and removed the air filter The perspective view which shows the external appearance of the state which removed the cover of the hand dryer concerning Embodiment 1 of this invention. The block diagram which shows the function structure of the principal part in connection with control of the hand-drying apparatus concerning embodiment of this invention. The figure which shows an example of the hardware constitutions of the processing circuit concerning Embodiment 1 of this invention. The perspective view which shows the installation method of the hand dryer concerning Embodiment 1 of this invention. In the hand dryer according to the first embodiment of the present invention, the operating state of the high-pressure airflow generator, the detection state of the hand detection sensor, and the time for measuring vibration to detect an abnormality of the hand dryer in the vibration sensor Figure showing the relationship between The flowchart which shows the procedure of the process which detects abnormality in the hand-drying apparatus concerning Embodiment 1 of this invention.

  Below, the hand dryer concerning embodiment of this invention is demonstrated in detail based on drawing. Note that the present invention is not limited to the embodiments.

Embodiment 1 FIG.
FIG. 1 is a perspective view showing an appearance of a hand dryer according to the first embodiment of the present invention. FIG. 2 is a side view of the hand dryer according to the first embodiment of the present invention. FIG. 3 is a top view of the hand dryer according to the first embodiment of the present invention. FIG. 4 is a cross-sectional view taken along the side of the hand dryer according to the first embodiment of the present invention. FIG. 5 is a cross-sectional plan view of the hand dryer according to the first embodiment of the present invention, and is a cross-sectional view taken along the line VV in FIG. FIG. 6 is a perspective view showing an appearance of the hand dryer according to the first embodiment of the present invention with the cover opened. FIG. 7 is a perspective view showing an appearance of the hand drying device in a state where the cover of the hand drying device according to the first embodiment of the present invention is opened and the air filter 20 is removed, and the air filter 20 is removed in FIG. It is a perspective view which shows the external appearance of the hand dryer of a state. FIG. 8 is a perspective view showing an external appearance of the hand dryer according to the first embodiment of the present invention with the cover removed.

  As shown in FIGS. 1 to 4, the casing 1 that forms the outer shell of the hand drying device 100 has hand insertion ports 2 on the front side and the side of the hand drying device 100 where a person stands to dry hands. A hand insertion section 3 having a size that allows a hand to be taken in and out as a processing space following the hand insertion port 2 is provided so that a hand can be inserted and removed. The casing 1 accommodates components such as a high-pressure airflow generator 9 described later and a control circuit (not shown) inside. The manual insertion portion 3 is formed as a sink-like recess in which the front surface and both side surfaces are opened in the lower portion on the front side of the casing 1 so that a hand can be inserted and removed from the front side and both side surfaces. That is, the hand insertion part 3 is a space inside the recess formed in the lower part of the front surface of the casing 1 by opening the front surface and both side surfaces, and is a space for drying the hands. In the first embodiment, the front-rear direction is the depth direction of the hand dryer 100, the side on which the cover 16 is disposed is the front, and the side on which the base 8 is disposed is the rear. The vertical direction is the height direction of the hand dryer 100.

  A water receiving portion 4 configured as a part of the casing 1 is formed at the rear and bottom side of the manual insertion portion 3. The water receiver 4 is disposed behind and below the hand insertion portion 3 to cover the hand insertion portion 3 from behind and below. The water receiving portion 4 includes a back side water receiving portion 4a which is a back portion having a standing wall surface provided extending in the height direction of the hand drying device 100 behind the hand inserting portion 3, and the hand inserting portion 3. And a bottom surface side water receiving portion 4b, which is a bottom surface portion provided on the bottom side. That is, the water receiving part 4 is provided in the cross-section L shape in the cross section along the side surface of the hand dryer 100 from the bottom part side of the hand insertion part 3 to the back side. In the left and right direction and the front edge portion of the water receiving portion 4, a barrier structure 5 with a curved surface structure protruding forward or upward is provided so that water does not scatter to the side and front of the hand insertion portion 3. It has become.

  The bottom surface side water receiving portion 4b has a forward inclined structure and has an inclined surface inclined from the rear to the front, and a drain port (not shown) is provided at the lower end of the inclined surface. A drain container 7 for storing water dripping from the drain port is provided below the bottom side water receiving portion 4b so as to be freely inserted and removed.

  The inner surface of the manual insertion portion 3 is coated with a coating such as a silicon-based water-repellent coating or a fluorine-based water-repellent coating, a coating of a hydrophilic material typified by titanium oxide, or impregnated with an antibacterial agent. . Thereby, the adhesion of dirt on the inner surface of the hand insertion portion 3 is reduced, and the propagation of bacteria is reduced.

  Above the manual insertion portion 3, a nozzle 12 that blows high-speed air downward toward the manual insertion portion 3 is provided. The nozzle 12 has a discharge port for blowing out high-speed air at the tip, and is provided on the upper wall 3 a that is the inner wall on the upper side of the hand insertion portion 3. The shape of the discharge port is, for example, a rectangular shape or a slit shape. A hand detection sensor 14 that detects the presence or absence of a hand in the hand insertion portion 3 is provided near the back side of the nozzle 12.

  The hand detection sensor 14 is communicably connected to the control unit 50 that controls the operation of the hand drying device 100, and when detecting that a hand is inserted into the hand insertion unit 3, A hand detection signal indicating the detection of insertion is transmitted to the control unit 50. The hand detection sensor 14 transmits a hand detection signal to the control unit 50 while detecting the insertion of the hand into the hand insertion unit 3.

  A vibration sensor 27 for detecting vibration of the bottom surface side water receiving portion 4b is provided on the lower surface of the bottom surface side water receiving portion 4b facing the nozzle 12, that is, the bottom surface of the bottom surface side water receiving portion 4b.

  The vibration sensor 27 is communicably connected to the control unit 50 that controls the operation of the hand drying apparatus 100, measures the magnitude of vibration of the bottom surface side water receiving unit 4 b, and transmits the measurement result to the control unit 50. To do. As the vibration sensor 27, a sensor using a piezoelectric effect is used, and a voltage corresponding to the magnitude of the acceleration of vibration generated in the bottom surface side water receiving portion 4b when high speed air hits the bottom surface side water receiving portion 4b. Is generated. The vibration sensor 27 measures the voltage value and transmits it to the control unit 50 as a vibration value that is a measurement result of the vibration magnitude of the bottom surface side water receiving portion 4b. The vibration sensor 27 is disposed so that the detection range includes an extension of the center line of the nozzle 12. The center line of the nozzle 12 is the center line of the airflow of high-speed air that is blown out from the nozzle 12 and passes through the center of the rectangular or slit-like discharge port. Note that the vibration sensor 27 does not necessarily have to be arranged on an extension line of the center line of the nozzle 12 as long as the magnitude of vibration of the bottom surface side water receiving portion 4b can be detected.

  FIG. 9 is a block diagram showing a functional configuration of main parts related to the control of the hand dryer 100 according to the embodiment of the present invention. The control unit 50 controls the operation of the hand dryer 100. The control unit 50 performs hand detection determination for determining the presence / absence of the hand in the hand insertion unit 3 based on the detection result in the hand detection sensor 14 that detects the presence / absence of the hand in the hand insertion unit 3, and determines the determination result of the hand detection determination. Based on this, the drive of the high-pressure airflow generator 9 is controlled. That is, the control unit 50 controls the operation of the high pressure air flow generator 9 based on the hand detection signal transmitted from the hand detection sensor 14, and the air flow from the high pressure air flow generator 9 into the hand insertion unit 3. Erupt.

  In addition, the control unit 50 determines whether there is an abnormality in the hand dryer 100 based on the vibration value measured by the vibration sensor 27. Based on the vibration value information transmitted from the vibration sensor 27, the control unit 50 determines the magnitude of vibration of the bottom surface side water receiving portion 4b. The control unit 50 has an acceleration range when the hand dryer 100 is normal and the high-pressure airflow generator 9 is operating, that is, when the hand dryer 100 is normal and the high-pressure airflow generator 9 is operating. By storing this voltage range, the controller 50 can accurately detect that the hand dryer 100 is in an “abnormal state”. The acceleration range when the hand dryer 100 is normal and the high pressure airflow generator 9 is operating, that is, the voltage range when the hand dryer 100 is normal and the high pressure airflow generator 9 is operating is: This can be said to be a normal value range that is a range of normal values of predetermined vibration values when the hand dryer 100 is normal and the high-pressure airflow generator 9 is operating. The normal value range is stored in the control unit 50 for each notch of the air volume of the high-speed air flow ejected from the nozzle 12.

  That the acceleration of the vibration measured by the vibration sensor 27 falls below the normal range indicates that the vibration of the bottom surface side water receiving portion 4b is small. When the acceleration of vibration measured by the vibration sensor 27 falls below the normal range, the capability of the high-pressure airflow generator 9 is deteriorated due to deterioration over time, air leakage due to damage to the air passage in the hand dryer 100, nozzle 12 or It can be determined that the occurrence of an abnormality such as an insufficient air volume due to clogging of the air filter 20 is detected.

  On the other hand, the fact that the acceleration of the vibration measured by the vibration sensor 27 exceeds the normal range indicates that the vibration of the bottom surface side water receiving portion 4b is increased. When the acceleration of vibration measured by the vibration sensor 27 exceeds a normal range, vibration increases due to an abnormality in the high-pressure airflow generator 9 as a vibration source, looseness or breakage of a fastening component 29 described later, vibration-proof components It can be determined that the occurrence of an abnormality such as aged deterioration of 32 and a decrease in rigidity due to breakage of the casing 1 is detected. That is, the hand dryer 100 can detect the occurrence of an abnormality other than the abnormality of the high-pressure airflow generator 9.

  The control unit 50 is realized, for example, as a processing circuit having the hardware configuration shown in FIG. FIG. 10 is a diagram illustrating an example of a hardware configuration of the processing circuit according to the first embodiment of the present invention. When the control unit 50 is realized as a processing circuit having the hardware configuration illustrated in FIG. 10, the control unit 50 executes, for example, a program stored in the memory 102 by the processor 101 illustrated in FIG. 10. Realized. A plurality of processors and a plurality of memories may cooperate to realize the above function. Further, a part of the function of the control unit 50 may be mounted as an electronic circuit, and the other part may be realized using the processor 101 and the memory 102.

  Above the hand insertion portion 3, a box-shaped space is formed by the base 8 and the casing 1 that form the outer shell of the hand-drying device 100 on the back side. In the box-shaped space, according to the hand detection signal in the high-pressure air flow generator 9 composed of a DC (Direct Current) brushless motor and a turbo fan rotated by the DC brushless motor, and a hand detection sensor 14 A control unit 50 that controls the operation of the hand dryer 100 including the high-pressure airflow generator 9 is incorporated. The high-pressure airflow generator 9 is a blower that generates an airflow blown from the nozzle 12. The air discharged from the high-pressure airflow generator 9 is jetted to the hand insertion portion 3 through the nozzle 12 and blown to the user's hand. Note that a commutator motor or an induction motor may be used instead of the DC brushless motor.

  Further, in the box-shaped space, an internal intake port 10 provided on the front surface of the casing 1 above the intake side and the manual insertion portion 3 of the high-pressure airflow generator 9, and the high-pressure airflow generator 9 And an internal intake air passage 11 communicating with the internal intake port 10 is provided.

  Further, an exhaust air passage 13 that communicates the exhaust side of the high-pressure airflow generator 9 and the nozzle 12 is provided in the box-shaped space. The exhaust air passage 13 is provided so as to surround the exhaust side of the high-pressure airflow generator 9. The air whose pressure is increased by the high-pressure airflow generator 9 is discharged to an exhaust air passage 13 provided in connection with the high-pressure airflow generator 9. Further, the exhaust air passage 13 is connected to a nozzle 12 provided on the upper wall 3a. Thereby, the high-pressure air discharged from the high-pressure air flow generator 9 passes through the exhaust air passage 13, is converted into high-speed air by the nozzle 12, and is ejected from the nozzle 12 into the manual insertion portion 3.

  A heater 15 is provided in the middle of the exhaust air passage 13 and upstream of the nozzle 12 to heat the air sent from the high-pressure airflow generator 9 and warm it. Further, an anti-vibration component 32 made of an elastic material is provided on the back side of the high-pressure airflow generator 9 so as to adhere to the high-pressure airflow generator 9 and absorb the vibration of the high-pressure airflow generator 9. It has been.

  An outer shell on the front side of the hand drying device 100 is formed outside the front surface of the casing 1 at the upper part of the hand insertion portion 3, and the left end is rotatably supported by the casing 1 so as to face the front side of the hand drying device 100. A cover 16 that can be opened and closed and that can be attached to and detached from the casing 1 is attached.

  A part of the left and right side surfaces of the casing 1 is provided with an inclined portion 17a that is inclined toward the center side in the left-right direction as it goes from the back side to the front side. Moreover, the recessed part 17 in which a part of ridgeline of the front surface of the casing 1 and a side surface and a part of side surface are dented is provided. That is, on the side surface of the casing 1, a step is provided between the inclined portion 17a and other portions. By connecting these step portions, the inclined portion 17a becomes a recess 17 in which a part of the side surface of the casing 1 is recessed. The inclined portion 17 a becomes the bottom surface of the concave portion 17.

  In a state where the cover 16 is closed, the outer periphery of the cover 16 abuts on the casing 1 at a portion other than the recess 17. Further, in the concave portion 17, the outer periphery of the cover 16 does not contact the concave portion 17, and the space formed between the cover 16 and the concave portion 17 becomes the external intake port 18. The external intake port 18 opens toward the outside. That is, the external air inlet 18 is formed across the cover 16 and the casing 1. Note that the external air inlet 18 is provided on the front side of the center position in the front-rear direction of the hand insertion portion 3 and at substantially the same position as the hand insertion port 2 on the front side of the hand insertion portion 3.

  An intake port wall 22 that rises from the front side to the back side of the hand dryer 100 is provided integrally with the cover 16 at positions adjacent to the external intake port 18 on both the left and right sides of the cover 16. In the external air inlet 18 formed by the concave portion 17 of the casing 1 and the air inlet wall 22 of the cover 16, the external air inlet so that the normal of the surface where the external air inlet 18 has the minimum cross-sectional area is inclined toward the back side. 18 is provided opening toward the back side. In the first embodiment, the recess 17 is provided to form the external intake port 18 by the recess 17 and the intake port wall 22 of the cover 16, but the recess 17 is not necessarily provided. When the concave portion 17 is not provided, the size of the cover 16 in the left-right direction is increased so that the intake port wall 22 is positioned outside the left and right side surfaces of the casing 1, so that the external intake port 18 is on the rear side. You may make it open toward.

  Inside the outer periphery of the cover 16, an external intake air passage 19 that connects the internal intake port 10 and the external intake port 18 is constituted by the cover 16 and the casing 1. That is, an external intake air passage 19 is formed across the cover 16 and the casing 1. It can be said that an external intake air passage 19 is formed between the cover 16 and the casing 1.

  As shown in FIG. 6, the front surface of the casing 1 that appears when the cover 16 is opened covers the internal intake port 10 provided in the casing 1, and passes through the external intake air passage 19 from the external intake port 18 to the internal intake port. A resin or metal air filter 20 that removes dust in the air sucked into the high-pressure airflow generator 9 from 10 is attached so as to be detachable by an insertion / removal operation in the front-rear direction. The area of the air filter 20 is larger than the cross-sectional area of the external intake port 18 and the external intake air passage 19 with respect to the ventilation direction. The air filter 20 may be a HEPA (High Efficiency Particulate) filter or an antibacterial filter.

  Next, the operation unit of the hand dryer 100 will be described. As shown in FIG. 6, an operation unit that can be operated from the outside is provided in a region near the air filter 20 on the front surface of the casing 1 that appears when the cover 16 is opened. The operation unit is provided such that the operation switch faces the front side, and is provided so that the user can easily see and operate from the front side. As the operation switch, the operation unit switches a power switch 21 a for switching on / off of energization to the control unit 50, an air volume adjustment switch 21 b for adjusting the air volume during operation of the high-pressure airflow generator 9, and on / off of the heater 15. A heater changeover switch 21c is provided. Each switch and each sensor are communicably connected to the control unit 50 through wiring (not shown).

  An enclosure wall 25 surrounding the power switch 21 a is integrally provided on the front surface of the casing 1 so as to protrude to the front side, and the enclosure wall 25 comes into contact with the inner surface side of the cover 16 when the cover 16 is closed. ing. Further, an enclosure wall 25 surrounding the air volume adjustment switch 21b and the heater changeover switch 21c is integrally provided on the front surface of the casing 1 so as to protrude to the front side, and when the cover 16 is closed, the enclosure wall 25 becomes the inner surface of the cover 16. It comes in contact with the side.

  As shown in FIG. 5, in the external intake air passage 19, a casing-side barrier 23 that is integrally provided on the front surface of the casing 1 and protrudes from the casing 1 toward the cover 16 side so as to surround the air filter 20. And it is extended and provided in the left-right direction. The casing-side barrier 23 and the cover-side barrier 24 divide the air passage of the air flowing from the outside of the hand dryer 100 to the inside of the hand dryer 100 to guide the air into the hand dryer 100. The external intake air passage 19 is provided with a cover-side barrier 24 that is provided integrally with the cover 16 and protrudes from the cover 16 toward the front side of the casing 1, that is, toward the back side of the hand dryer 100. Yes. The cover-side barrier 24 is provided in a U shape that is connected in the vertical direction and the horizontal direction on the back side of the cover 16.

  The casing side barrier 23 and the cover side barrier 24 are spaced from each other in the flow direction of the wind in the external intake air passage 19, and the front ends of the casing side barrier 23 and the cover side barrier 24 are in the front-rear direction. They are three-dimensionally arranged so as to overlap each other. The casing-side barrier 23 and the cover-side barrier 24 abut the tips of the casing-side barrier 23 and the cover-side barrier 24 against the opposing casing 1 or the cover 16 and shift the arrangement position of the casing-side barrier 23 and the cover-side barrier 24 in the vertical direction. Only the vertical ends of the side barrier 23 and the cover side barrier 24 may be three-dimensionally arranged so as to overlap each other in the vertical direction. Further, in the first embodiment, the tip of the inlet wall 22 is extended to the position on the back side from the tip of the casing side barrier 23 so that the inlet wall 22 and the casing side barrier 23 overlap each other in the front-rear direction. Therefore, the air inlet wall 22 also functions as the cover side barrier 24 and can be said to be the cover side barrier 24.

  Further, on the front surface of the cover 16, a display unit 31 is provided as a notification unit that notifies the user of various information such as the operation state of the hand drying device 100 and the occurrence of an abnormality in the hand drying device 100. For example, an LED (Light Emitting Diode) is used for the display unit 31. The display unit 31 displays various information by blinking or lighting, for example, under the control of the control unit 50.

  Next, the layout of the external intake port 18, the internal intake port 10, the external intake air passage 19, the internal intake air passage 11, and the high-pressure airflow generator 9 will be described. The position of the internal air inlet 10 is disposed above the center position of the external air inlet 18 in the vertical direction. The high-pressure airflow generator 9 is arranged so that the suction side is the back side and the rotation axis of the DC brushless motor of the high-pressure airflow generator 9 is horizontal.

  An internal intake air passage 11 that connects the internal intake 10 provided on the front side of the high-pressure airflow generator 9 and the suction side of the high-pressure airflow generator 9 is gradually inclined upward from the position of the internal intake 10. The upper side of the high-pressure airflow generator 9 extends to the back side and is bent downward to communicate with the suction side of the high-pressure airflow generator 9. The internal intake air passage 11 in the vicinity of the internal air inlet 10 is provided with grid-like ribs 26 parallel to the air flow direction at a pitch larger than the pitch of the mesh of the air filter 20. Is finely divided. As a result, even if the air filter 20 is forgotten to be attached, large garbage such as paper waste is caught by the ribs 26 and is not sucked beyond the ribs 26.

  Next, an operation for drying the hand in the hand drying apparatus 100 will be described. When the cover 16 is opened and the power switch 21a is turned on, the controller 50 is energized, the cover 16 is closed, and the hand dryer 100 is ready for use. At this time, the display unit 31 provided in front of the hand dryer 100 is lit. Thereby, the user can confirm that the hand dryer 100 is in a usable state.

  Next, when the user inserts the wet hand into the hand insertion part 3 from the hand insertion opening 2 to the vicinity of the wrist, the hand detection sensor 14 detects the insertion of the hand into the hand insertion part 3. When the hand detection sensor 14 detects the insertion of a hand into the hand insertion unit 3, the hand detection sensor 14 transmits a hand detection signal to the control unit 50. The control unit 50 operates the high-pressure airflow generator 9 based on the hand detection signal transmitted from the hand detection sensor 14.

  When the high-pressure airflow generator 9 is activated, the air outside the hand dryer 100 flows from the back side to the front side along the inclined portion 17a and the inlet wall 22 provided in the casing 1 to the external inlet 18. Sucked from. The air sucked from the external air intake 18 passes through the external air intake air passage 19, travels with the course being bent by the casing side barrier 23 and the cover side barrier 24, and dust is removed by the air filter 20 to the internal air intake 10. Inhaled. Even when water droplets are sucked together with air from the external air inlet 18, the passage of water droplets is blocked by the casing side barrier 23 and the cover side barrier 24, and only air can be passed.

  The air sucked into the internal air intake 10 passes through the internal air intake air passage 11 and rises upward from the position of the internal air intake 10, passes over the high-pressure airflow generator 9, and moves to the back side. And is sucked from the suction side of the high-pressure airflow generator 9. The high-pressure airflow generator 9 converts the air sucked from the intake side into high-pressure air and exhausts it from the exhaust side. The high-pressure air exhausted from the high-pressure airflow generator 9 passes through the exhaust air passage 13, is converted from the nozzle 12 into a high-speed airflow having high kinetic energy, and is blown downward into the manual insertion portion 3. The jet direction of the high-speed airflow from the nozzle 12 is configured to be slightly inclined to the back side from the direct downward direction.

  The high-speed air flow blown out from the nozzle 12 hits a wet hand inserted in the hand insertion portion 3, and moisture attached to the hand is peeled off from the surface of the hand and blown off to dry the hand. Furthermore, by inserting and removing the hand in the hand insertion portion 3, all water droplets adhering to the entire hand are eliminated, and the hand is dried. When the heater switch is turned on by the heater changeover switch 21c, the heater 15 is energized and the high-pressure air passing through the exhaust air passage 13 is heated. Also feel better.

  When the hand is extracted from the hand insertion portion 3 after the hand drying process is completed, the hand detection sensor 14 detects that the hand has been extracted from the hand insertion portion 3. When the hand detection sensor 14 detects that the hand has been removed from the hand insertion unit 3, the hand detection sensor 14 transmits a non-detection signal to the control unit 50. The control unit 50 stops the high-pressure airflow generator 9 based on the non-detection signal transmitted from the hand detection sensor 14. The water droplets blown from the hand flow down toward the drain outlet in the bottom side water receiving portion 4b having a forward tilt structure, and are accommodated in the drain container 7 from the drain outlet. The hand detection sensor 14 may be configured to stop transmitting the hand detection signal without transmitting the non-detection signal when the hand insertion unit 3 has no hand.

  Next, installation of the hand dryer 100 will be described. FIG. 11 is a perspective view showing a method for installing the hand dryer 100 according to the first embodiment of the present invention. First, the mounting plate 28 is fixed to a wall 40 made of a strong material such as a toilet using a plurality of fastening parts 29. Next, the base 8 of the hand dryer 100 is attached to the hook 41 protruding from the attachment plate 28 from above. In FIG. 11, the hand dryer 100 is disassembled into the casing 1, the drain container 7, the air filter 20, and the structure 33 in which the other components housed in the casing 1 are assembled. Although the state is shown, the hand dryer 100 in a state in which at least the main components are accommodated in the casing 1 is attached to the hook portion 41.

  Next, the hand dryer 100 is fixed to the wall 40 by attaching the fastening component 29 to the wall 40 through the through hole 30 provided below the back of the hand dryer 100. Thereby, the hand-drying apparatus 100 is prevented from moving in the vertical direction, and can be prevented from falling off the mounting plate 28. Moreover, the hand dryer 100 can be installed in close contact with the wall 40 by directly attaching the back surface of the hand dryer 100 to the wall 40.

  Next, an abnormality determination process for detecting an abnormality in the hand dryer 100 will be described. FIG. 12 shows the operating state of the high-pressure airflow generator 9, the hand detection state of the hand detection sensor 14, and the vibration sensor 27 of the hand dryer 100 in the hand dryer 100 according to the first embodiment of the present invention. It is a figure which shows the relationship with the time which measures a vibration in order to detect abnormality. FIG. 13 is a flowchart showing a procedure of processing for detecting an abnormality in the hand dryer 100 according to the first embodiment of the present invention.

  In step S10, after the high-pressure airflow generator 9 is activated and the moisture attached to the user's hand inserted in the manual insertion portion 3 is blown off by the high-speed airflow blown from the nozzle 12, the user manually inserts it. The operation of pulling out the hand from the part 3 and drying the hand is completed. In step S <b> 20, at time T <b> 1 immediately after the user pulls out the hand from the hand insertion unit 3, as a state of each part of the hand drying device 100, the control unit 50 transmits a non-detection signal transmitted from the hand detection sensor 14. Based on the above, it is determined that the hand is not inserted into the hand insertion portion 3 as a “no hand” state. That is, based on the detection result of the hand detection sensor 14, the control unit 50 determines that the “hand is present” state in which the hand is inserted in the hand insertion unit 3 and the “hand” in which no hand is inserted in the hand insertion unit 3. Change the judgment to "None".

  After changing the determination to the “no hand” state in which no hand is inserted into the hand insertion unit 3, the control unit 50 continues the high-pressure airflow generator 9 for a predetermined continuous operation time in step S30. Make it work. And in step S40, the vibration sensor 27 measures the vibration value of the bottom face side water receiving part 4b according to control of the control part 50. The vibration sensor 27 measures the magnitude of vibration generated in the bottom surface side water receiver 4b only during the continuous operation time, and transmits the vibration value as a measurement value to the control unit 50. That is, the continuous operation time is a vibration measurement time in the vibration sensor 27.

  The continuous operation time is the time from time T1 to time T2. At this time, the high-pressure airflow generator 9 is in operation, and a high-speed airflow is ejected from the nozzle 12. And since there is no user's hand in the hand insertion part 3 and there is nothing which obstruct | occludes a high speed airflow, the high speed airflow is colliding with the bottom face side water receiving part 4b of the water receiving part 4 which opposes, attenuating. When the high-speed air flow collides, vibration having a certain frequency and a certain amplitude is generated in the bottom surface side water receiving portion 4 b of the water receiving portion 4. The controller 50 controls the vibration sensor 27 to measure the magnitude of vibration generated in the bottom surface side water receiver 4b only during the continuous operation time.

  In step S50, the control unit 50 compares the vibration value received from the vibration sensor 27 with the normal value range, and determines whether or not the hand dryer 100 is in an abnormal state. When the vibration value is outside the normal value range, the hand dryer 100 determines that the hand dryer 100 is in an “abnormal state” in which an abnormality has occurred. When the vibration value is within the normal value range, the hand dryer 100 determines that the hand dryer 100 is in a “normal state” in which the hand dryer 100 is normal.

  If it is determined that the state is “abnormal state”, “Yes” is determined in step S50, and the process proceeds to step S60. When it is determined that the state is “normal state”, the result in Step S50 is No, and a series of abnormality determination processes are performed.

  In step S60, the control unit 50 blinks the display unit 31 provided in the hand drying device 100, and notifies the user of the “abnormal state” of the hand drying device 100 by visual means. By performing the processing described above, the hand dryer 100 can detect an abnormality of the hand dryer 100 and notify the user of the occurrence of the abnormality.

  Note that the control unit 50 may notify the user of the “abnormal state” by auditory means using a buzzer or the like. When the control unit 50 determines the state of “no hand” based on the non-detection signal transmitted from the hand detection sensor 14 after a predetermined continuous operation time has elapsed, the high-pressure airflow generator The operation of 9 is stopped. Note that the control unit 50 determines that there is a “hand present” state based on the hand detection signal transmitted from the hand detection sensor 14 after a predetermined continuous operation time has elapsed. The generator 9 is activated.

  In addition, the control unit 50 determines that the “abnormal state” when the vibration value is larger than the first predetermined threshold value outside the normal value range and the second predetermined threshold value when the vibration value is outside the normal value range. By changing the blinking pattern on the display unit 31 in the “abnormal state” in the case of small size, the cause of the abnormality can be narrowed down and notified to the user. The second threshold is smaller than the first threshold. The first threshold value is, for example, the upper limit value of the normal value range, but is not limited to this. The second threshold value is, for example, the lower limit value of the normal value range, but is not limited thereto.

  In addition, when the control unit 50 determines that the state is an “abnormal state”, the control unit 50 forcibly stops the high-pressure airflow generation device 9, and then the state of “with hand” is based on the detection result of the hand detection sensor 14. Even if this determination is made, a “prohibition mode” in which the high-pressure airflow generator 9 is not operated may be executed. Thereby, use of the hand dryer 100 at the time of abnormality occurrence can be prohibited. Further, the control unit 50 may execute the “prohibition mode” only when the measured vibration value is larger or smaller than a predetermined threshold value. The control unit 50 is only in the case where the vibration value is larger than the predetermined third threshold value outside the normal value range or at least one of the case where the vibration value is smaller than the predetermined fourth threshold value outside the normal value range. The “prohibition mode” may be executed. The fourth threshold value is smaller than the third threshold value. The third threshold value is, for example, the upper limit value of the normal value range, but is not limited to this. The fourth threshold value is, for example, the lower limit value of the normal value range, but is not limited thereto.

  In addition, in this Embodiment 1, although shown about the case where the vibration sensor which detects the acceleration at the time of a high-speed airflow colliding with the water receiving part 4 was used, the vibration sensor 27 is not limited to this. In the vibration sensor 27, an electrode is provided on the bottom surface of the bottom surface side water receiving portion 4b of the water receiving portion 4, and a vibration sensor that measures vibration by detecting an eddy current caused by displacement of the bottom surface side water receiving portion 4b, Alternatively, a vibration sensor that measures vibration by detecting capacitance may be used.

  Further, the water receiver 4 of the above-described hand dryer 100 is formed with a uniform plate thickness as a part of the casing 1. On the other hand, the thickness of the portion where the high-speed air flow ejected from the nozzle 12 collides, that is, the thickness of the portion corresponding to the extended line of the center line of the nozzle 12 is thinned to improve the sensitivity of vibration detection by the vibration sensor 27 You may let them. In this case, by arranging the vibration sensor 27 on the extended line of the center line of the nozzle 12 on the lower surface of the bottom surface side water receiving portion 4b of the water receiving portion 4, the vibration detection sensitivity by the vibration sensor 27 is further improved.

  Further, in the above-described first embodiment, after the detection result of the hand detection sensor 14 changes from the “hand present” state to the “handless” state, the high-pressure airflow generator 9 is kept in a predetermined time. Only the continuous operation was performed, and the configuration for measuring the vibration of the water receiver 4 was shown. However, in detecting whether the product state in the hand dryer 100 is normal or abnormal, the high-pressure airflow generator 9 is operating while the detection result in the hand detection sensor 14 is “no hand”. The vibration may be measured sometimes, and the timing for measuring the vibration of the water receiving portion 4 is not limited to the timing described above. For example, when the hand dryer 100 is not used, the high-pressure airflow generator 9 may be periodically operated for a predetermined time to measure the vibration of the bottom-side water receiver 4b.

  Moreover, in this Embodiment 1, although the case where the vibration sensor 27 was provided in the lower surface of the bottom face side water receiving part 4b of the water receiving part 4 was shown, the vibration sensor 27 is made into a detection target in the hand dryer 100. The position of the vibration sensor 27 is not limited to the lower surface of the bottom surface side water receiving portion 4b.

  In the first embodiment, the nozzle 12 is disposed on the upper wall 3 a that is the upper inner wall of the hand insertion portion 3, and the high-speed air ejected from the nozzle 12 on one side of the hand inserted into the hand insertion portion 3. Although the hand drying device 100 configured to blow the water droplets attached to the hand by applying the contact is shown, the configuration of the hand drying device 100 is not limited to this. For example, the hand drying device 100 is provided with two nozzles 12 so as to face one side and the other side of the hand insertion unit 3 and applies high-speed air from the nozzles to both surfaces of the hand inserted into the hand insertion unit 3. It may be said. In this case, when the vibration sensor 27 is provided in the extending direction of the center line of the nozzle 12, the high-speed air is directly driven by the vibration sensor so that the high-speed air is ejected from the nozzle 12 on one side only when the vibration is measured. It is even better to measure the vibration at the position where 27 is provided. This is because when high-speed air is ejected from both nozzles 12, the ejected high-speed air collides with each other.

  However, a damper that opens and closes the air path or a high-pressure airflow generator 9 that generates high-speed air from each nozzle 12 is provided for each nozzle so that the ejection of high-speed air from each nozzle 12 can be controlled independently. It is necessary and the configuration becomes complicated. For this reason, vibration may be measured in a state where air is ejected from both nozzles 12.

  As described above, the hand dryer 100 according to the first embodiment has a normal or abnormal product state due to the vibration sensor 27 provided on the bottom surface of the bottom surface side water receiving portion 4b of the water receiving portion 4. It can be detected easily and accurately. Although the hand dryer 100 cannot identify the part where the abnormality has occurred, the factor assumed by the numerical value of the vibration acceleration as described above can be narrowed down, and inspection and maintenance should be performed efficiently. Can do.

  Further, while the control unit 50 determines that the “hand is present” state based on the detection result of the hand detection sensor 14, the high-speed air flow collides with the user's hand and is blocked. Therefore, the product state cannot be determined even if the vibration of the water receiver 4 is measured. For this reason, in the hand dryer 100, the detection result of the hand detection sensor 14 indicates that the hand is not inserted into the hand insertion unit 3 from the state of “with hand” in which the hand is inserted into the hand insertion unit 3. After determining that the state has changed to “None”, the high-pressure airflow generator 9 is continuously operated for a predetermined time, and the vibration of the water receiver 4 is measured. As a result, the hand drying apparatus 100 can reduce power consumption by operating the vibration sensor 27 in a “hand-on” state in which the product state cannot be determined, thereby saving energy.

  Therefore, the hand drying apparatus 100 according to the first embodiment has an effect that an abnormality in the product can be accurately detected with a simple configuration. And the hand dryer 100 concerning this Embodiment 1 has an effect that it can detect generation | occurrence | production of abnormality other than abnormality of the high pressure airflow generator 9, and abnormality of the high pressure airflow generator 9. FIG.

  The configuration described in the above embodiment shows an example of the contents of the present invention, and can be combined with another known technique, and can be combined with other configurations without departing from the gist of the present invention. It is also possible to omit or change the part.

  1 casing, 2 hand insertion port, 3 hand insertion part, 3a upper wall, 4 water receiving part, 4a back side water receiving part, 4b bottom side water receiving part, 5 barrier structure, 7 drain container, 8 base, 9 high pressure air Flow generator, 10 internal intake port, 11 internal intake air channel, 12 nozzle, 13 exhaust air channel, 14 hand detection sensor, 15 heater, 16 cover, 17 recess, 17a inclined portion, 18 external intake port, 19 external intake air Road, 20 air filter, 21a power switch, 21b air volume control switch, 21c heater changeover switch, 22 inlet wall, 23 casing side barrier, 24 cover side barrier, 25 enclosure wall, 26 rib, 27 vibration sensor, 28 mounting plate, 29 Fastening parts, 30 Through holes, 31 Display part, 32 Anti-vibration parts, 40 Wall, 41 Hook part, 50 Control part, 100 Hand dryer Device, 101 processor, 102 memory.

Claims (8)

A casing having a nozzle that blows out an air flow toward a hand insertion portion into which a hand can be inserted;
An air blower for generating an air flow blown from the nozzle;
A hand detection sensor for detecting a hand in the hand insertion portion;
A control unit that performs hand detection determination for determining presence or absence of a hand in the hand insertion unit based on a detection result in the hand detection sensor, and controls driving of the blower unit based on a determination result of the hand detection determination;
A vibration sensor that measures a vibration value that is a magnitude of vibration in the casing;
A hand-drying device for wiping away moisture adhering to the hand inserted into the hand insertion portion by the air flow ejected from the nozzle,
The control unit determines the vibration value measured by the vibration sensor when it is determined that a hand is not inserted into the hand insertion unit based on the determination result of the hand detection determination and the air blowing unit is operating. And determining whether there is an abnormality in the hand dryer based on a normal value range that is a range of normal values of the vibration value when the hand dryer is normal and the air blower is operating. ,
Hand drying device characterized by. A notification unit for notifying the abnormality of the hand drying device outside the hand drying device;
The control unit operates the notification unit when it is determined that an abnormality has occurred in the hand dryer.
The hand dryer according to claim 1. In the case where the vibration value is greater than a predetermined first threshold value and the vibration value is smaller than the first threshold value and smaller than a predetermined second threshold value, the control unit performs the notification. Make the parts perform different actions,
The hand dryer according to claim 2. After determining that the control unit has changed from a state in which a hand is inserted into the hand insertion unit based on a determination result of the hand detection determination to a state in which a hand is not inserted into the hand insertion unit, Determining the presence or absence of an abnormality in the hand dryer based on the vibration value measured by a vibration sensor and the normal value range;
The hand dryer according to any one of claims 1 to 3. After determining that the control unit has changed from a state in which a hand is inserted into the hand insertion unit to a state in which a hand is not inserted into the hand insertion unit based on the determination result of the hand detection determination, Continuously operating the air blowing unit for a predetermined continuous operation time;
The hand dryer according to claim 4. The controller does not operate the blower when it determines the occurrence of an abnormality in the hand dryer;
The hand dryer according to any one of claims 1 to 5, wherein: The control unit has at least one of a case where the vibration value is larger than a predetermined third threshold value and a case where the vibration value is smaller than the third threshold value and smaller than a predetermined fourth threshold value. In the case, do not operate the blower,
The hand dryer according to claim 6. A water receiving portion disposed below the manual insertion portion so as to face the nozzle;
The vibration sensor is disposed in the water receiving portion and measures the magnitude of vibration of the water receiving portion when the air flow blown from the nozzle collides with the water receiving portion;
The hand dryer according to any one of claims 1 to 7, wherein