CN111356392B - Hand drying device - Google Patents
Hand drying device Download PDFInfo
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- CN111356392B CN111356392B CN201780096201.8A CN201780096201A CN111356392B CN 111356392 B CN111356392 B CN 111356392B CN 201780096201 A CN201780096201 A CN 201780096201A CN 111356392 B CN111356392 B CN 111356392B
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47K—SANITARY EQUIPMENT NOT OTHERWISE PROVIDED FOR; TOILET ACCESSORIES
- A47K10/00—Body-drying implements; Toilet paper; Holders therefor
- A47K10/48—Drying by means of hot air
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Abstract
A hand drying device (1) is provided with: a water receiving part (11) which can be assembled and disassembled relative to the main body box body (3) and recovers water blown away from hands inserted into the processing space; a hand detection sensor (10) having an infrared light emitting element that emits infrared light and an infrared light receiving element that outputs a signal indicating the amount of received infrared light; and a control unit (20) for determining whether a hand is inserted into the processing space, wherein the control unit (20) drives the high-pressure air generating device (4) when the hand is inserted into the processing space, wherein the control unit periodically updates an upper threshold value for determining whether the hand is inserted into the processing space based on a reference value of a sensor input value, which is the amount of infrared light received indicated by a signal input from the hand detection sensor (10), determines that the hand is inserted into the processing space when the sensor input value is equal to or greater than the upper threshold value, and stops updating the upper threshold value when the sensor input value is equal to or less than a lower threshold value for determining whether the water receiving unit (11) is attached to the main body case (3).
Description
Technical Field
The present invention relates to a hand dryer that blows an air flow to wet hands to dry the hands.
Background
In order to keep the hands in a sanitary state, it is necessary to perform not only a hand washing process but also a drying process after the washing process in a sanitary manner. In order to dry the washed hands hygienically, a hand drying device is used which sprays a high-speed air flow to the hands instead of wiping a towel or a handkerchief of the washed wet hands, blows off water attached to the hands, and dries the hands.
The hand dryer is provided with a concave hand insertion portion in a housing, and a hand detection sensor including an infrared light emitting element and an infrared light receiving element is disposed in the hand insertion portion in addition to an air nozzle. When the hand detection sensor detects that a hand is inserted into the treatment space in the hand insertion portion, the high-pressure air generating device is operated, and the high-pressure air is converted into a high-speed air flow and is ejected from the air nozzle. When the hand detection sensor detects that the hand is pulled out from the hand insertion portion, the high-pressure air generation device stops, and the high-speed air flow from the air nozzle stops.
The light emitting direction of the infrared light emitting element of the hand detection sensor composed of the infrared light emitting element and the infrared light receiving element has an angle with the light receiving direction of the infrared light receiving element, so that the infrared light emitted from the infrared light emitting element is reflected at the water receiving part at the lower part of the hand insertion part, and the reflected light is received by the infrared light receiving element. When a hand is inserted into the detection range of the hand insertion portion, the infrared ray is reflected by the hand positioned closer to the hand detection sensor than the water receiving portion, and the amount of light received by the infrared ray receiving element increases. That is, the hand detection sensor can detect the hand inserted in the hand insertion portion when the amount of light received by the infrared light receiving element increases as compared to when the light emitted by the infrared light emitting element is reflected by the water receiving portion. The hand drying device drives the high-pressure air generating device when the hand detection sensor detects that the hand is inserted into the hand insertion portion.
Patent document 1 discloses a hand drying device in which a water receiving unit can be removed to facilitate cleaning of a hand drying device main body and the water receiving unit.
Documents of the prior art
Patent document
Patent document 1: japanese patent No. 3970762
Disclosure of Invention
Problems to be solved by the invention
The hand drying device disclosed in patent document 1 has a problem that, when the water receiving unit is detached, the amount of light received by the infrared ray receiving element increases due to reflection of infrared rays at the water receiving unit, and therefore, insertion of a hand into the hand insertion unit is erroneously detected, resulting in malfunction.
The present invention has been made in view of the above circumstances, and an object thereof is to obtain a hand dryer which prevents erroneous detection of insertion of a hand into a hand insertion portion due to attachment and detachment of a water receiving portion.
Means for solving the problems
In order to solve the above problems and achieve the object, the present invention includes: a main body case provided with a concave hand insertion portion on a front surface; a high pressure air generating device which is arranged inside the body box body and generates high pressure air; a nozzle for converting high-pressure air into high-speed air flow and spraying the high-speed air flow to a processing space in the hand insertion part; a water receiving part which can be assembled and disassembled relative to the body box body and collects water blown by high-speed air flow from the hand of the processing space inserted into the hand inserting part; a hand detection sensor provided above the hand insertion portion and having an infrared light emitting element that emits infrared light and an infrared light receiving element that outputs a signal indicating a light receiving amount of the infrared light; and a control unit for determining whether or not a hand is inserted into the processing space, and driving the high-pressure air generating device when the hand is inserted into the processing space. The control unit periodically updates an upper threshold value, which is a threshold value for determining whether or not the light receiving amount of infrared rays is inserted into the processing space, based on a reference value, which is a sensor input value, which is a light receiving amount of infrared rays indicated by a signal input from the hand detection sensor.
Effects of the invention
The hand dryer of the present invention exhibits the following effects: the insertion of a hand into the hand insertion portion can be prevented from being erroneously detected by attachment and detachment of the water receiving portion.
Drawings
Fig. 1 is a longitudinal sectional view of a hand dryer according to embodiment 1 of the present invention.
Fig. 2 is an exploded perspective view of the hand dryer of embodiment 1.
Fig. 3 is a flowchart showing a process flow of hand detection determination in the hand drying device according to embodiment 1.
Fig. 4 is a timing chart of hand detection determination in the hand drying device according to embodiment 1.
Fig. 5 is a flowchart showing a process flow of hand detection determination in the hand drying device according to embodiment 2 of the present invention.
Fig. 6 is a timing chart of hand detection determination in the hand drying device according to embodiment 2.
Fig. 7 is a diagram showing a configuration in which the functions of the control unit according to any one of embodiments 1 to 4 are realized by hardware.
Fig. 8 is a diagram showing a configuration in which the functions of the control unit according to any one of embodiments 1 to 4 are realized by software.
Detailed Description
Hereinafter, a hand dryer according to an embodiment of the present invention will be described in detail with reference to the drawings. The present invention is not limited to the embodiment.
Embodiment mode 1
Fig. 1 is a longitudinal sectional view of a hand dryer according to embodiment 1 of the present invention. Fig. 2 is an exploded perspective view of the hand dryer of embodiment 1. The hand drying device 1 according to embodiment 1 includes a main body case 3, and the main body case 3 is formed with a hand insertion portion 2 which is a recess having an open front surface. A high-pressure air generating device 4 is incorporated in the main body case 3. The high-pressure air generated by the high-pressure air generating device 4 is supplied to the air nozzle 5. Moisture adhering to the hand inserted into the processing space in the hand insertion portion 2 is blown away by the high-speed air flow ejected from the air nozzle 5.
The high-pressure air generating apparatus 4 is configured by unitizing a motor 7, which is a dc brushless motor or a commutator motor (japanese: commutator モータ), and a turbo fan (not shown) rotated by the motor 7.
An air nozzle 5 is connected to an air outlet of the high-pressure air generator 4, and the air nozzle 5 converts the high-pressure air sent from the high-pressure air generator 4 into a high-speed air flow and blows the high-speed air flow out into the processing space in the hand insertion portion 2. The air nozzle 5 is attached to an opening formed in the upper edge of the hand insertion port of the hand insertion portion 2 such that the ejection port faces downward. The air nozzle 5 blows a high-speed air flow to the hand inserted into the treatment space in the hand insertion portion 2, and peels off and blows away water droplets adhering to the hand from the hand without rubbing the hand.
A window 9 is formed by fitting a light-transmitting member into the rear side of the portion of the upper jaw 8 provided above the hand insertion portion 2, in which the air nozzle 5 is provided. A hand detection sensor 10 for detecting a hand is disposed in the window 9.
The hand detection sensor 10 is composed of an infrared light emitting element that emits infrared light and an infrared light receiving element that outputs a signal indicating the amount of received infrared light. The hand detection sensor 10 is provided with an infrared light emitting element so as to emit light from the upper jaw 8 toward the water receiving portion 11. When a hand is not inserted into the processing space in the hand insertion portion 2, the infrared light receiving element receives infrared light emitted from the infrared light emitting element and reflected by the water receiving portion 11, and outputs a signal indicating the amount of received infrared light to the control portion 20. Hereinafter, the amount of light received indicated by a signal input from the infrared light receiving element to the control unit 20 is referred to as a sensor input value. When a hand is inserted into the hand insertion portion 2, light emitted from the infrared light emitting element is reflected by the hand, and the sensor input value increases. At this time, when the sensor input value exceeds the upper threshold value, which is the threshold value for determining whether or not the hand is inserted into the processing space in the hand insertion unit 2, the hand is determined to be inserted into the processing space in the hand insertion unit 2.
The sensor input value varies depending on the environment in which the hand dryer 1 is installed, such as irradiation of sunlight or light by illumination. Therefore, in order to ignore the influence of the environment in which the hand drying device 1 is installed, the upper threshold value, which is the threshold value for determining that the hand is inserted into the processing space in the hand insertion portion 2, is set to a value obtained by adding the 1 st fixed value to the reference value, which is the average value of the sensor input values. The upper threshold is periodically updated and set to a threshold value that matches the state of the surrounding environment. The update period of the upper threshold can be exemplified as every 6.4 seconds, but is not limited thereto.
The upper jaw 8 is provided with a control unit 20, and the control unit 20 determines whether or not a hand is inserted into the processing space in the hand insertion unit 2 based on a signal input from the hand detection sensor 10, and drives the high-pressure air generating device 4 when the hand is inserted into the processing space. When the hand detection sensor 10 detects that a hand is inserted into the processing space in the hand insertion portion 2, the control portion 20 operates the high-pressure air generation device 4 to jet a high-speed air flow into the processing space in the hand insertion portion 2, thereby blowing off moisture adhering to the hand.
The water blown up from the hand is collected in the water receiving portion 11 below the hand insertion portion 2. The water receiving portion 11 is provided with an opening 11b leading to a communication path 11a connected to the drain container 12. The water receiving portion 11 is inclined downward toward the opening 11b, and water adhering to the water receiving portion 11 flows into the communication path 11a from the opening 11b and is stored in the drain container 12 through the communication path 11 a.
As shown in fig. 2, the water receiving portion 11 and the drain container 12 are detachable from the main body casing 3. By detaching the water receiving portion 11 and the drain container 12 from the main body casing 3, the water receiving portion 11, the drain container 12, and the main body casing 3 can be easily cleaned.
The control unit 20 is set with a lower threshold for determining whether or not the amount of infrared radiation received by the water receiving unit 11 is attached to the main body casing 3. The lower threshold is set to a value obtained by subtracting the 2 nd fixed value from the reference value, in order to ignore the influence of the surrounding environment, as in the upper threshold. The lower threshold is periodically updated and set to a threshold value that matches the state of the surrounding environment. The update period of the lower threshold can be exemplified as every 6.4 seconds, but is not limited thereto.
Fig. 3 is a flowchart showing a process flow of hand detection determination in the hand drying device according to embodiment 1. When the power is turned on, the hand detection determination process is started. In step S1, the control unit 20 updates the reference value. In step S2, the control unit 20 sets an upper threshold and a lower threshold. The control unit 20 sets a value obtained by adding the 1 st fixed value to the reference value as the upper threshold, and sets a value obtained by subtracting the 2 nd fixed value from the reference value as the lower threshold. In step S3, the control unit 20 determines whether or not the 1 st set time has elapsed since the upper threshold and the lower threshold were set. If the 1 st set time has not elapsed since the upper and lower threshold values were updated, the routine proceeds to step S4. When the 1 st set time has elapsed since the upper and lower thresholds were updated, the process proceeds to step S6.
In step S6, the control unit 20 determines whether or not the water receiving unit 11 is attached to the main body casing 3. If the sensor input value is not less than the lower threshold, yes in step S6, control unit 20 determines that water receiving unit 11 is attached to main body casing 3, and proceeds to step S1. If the sensor input value is lower than the lower threshold value, no in step S6, control unit 20 determines that water receiving unit 11 is not attached to main body casing 3, and proceeds to step S4.
In step S4, the control unit 20 determines whether or not a hand is inserted into the processing space in the hand insertion unit 2. When the sensor input value is lower than the upper threshold, the control unit 20 determines that the hand is not inserted into the processing space in the hand insertion unit 2, and returns to step S3. If the sensor input value is equal to or greater than the upper threshold, the control unit 20 determines that the hand is inserted into the processing space in the hand insertion unit 2, and the process proceeds to step S5. In step S5, the control unit 20 drives the motor 7 for a certain time and proceeds to step S3.
Fig. 4 is a timing chart of hand detection determination in the hand drying device according to embodiment 1. In fig. 4, the change in the upper threshold is indicated by a broken line of a thick line, the change in the lower threshold is indicated by a one-dot chain line, and the sensor input value is indicated by a solid line. Time t0、t1、t2、t3、t4、t5、t6、t7、t8、t9、t10Is the update period of the upper and lower thresholds. At time t1The control unit 20 updates the reference value and updates the upper and lower threshold values. At time t1aWhen the water receiving portion 11 is detached from the main body case 3, the sensor input value is lower than the lower threshold. At time t2、t3Since the sensor input value is lower than the lower threshold, the control unit 20 updates the reference value, but does not update the upper threshold and the lower threshold. At time t3aSince the sensor input value is equal to or greater than the upper threshold, the control unit 20 drives the motor 7. At time t4、t5Since the sensor input value is lower than the lower threshold, the control unit 20 updates the reference value, but does not update the upper threshold and the lower threshold. At time t5aThe water receiving unit 11 is attached to the main body case 3, and the sensor input value is equal to or higher than the lower limit threshold. At time t6、t7、t8、t9、t10The control unit 20 updates the reference value and updates the upper and lower threshold values。
In fig. 4, the change in the upper threshold in the hand dryer in which the lower threshold is not set is also indicated by a thin dashed line. Hand dryer without setting lower threshold at time t1aAfter the water receiving part is detached from the body case, at time t2、t3、t4、t5The reference value is updated based on the sensor input value in the state where the water receiving portion is detached from the main body case, and the upper limit threshold value is updated. Thus, when at time t5aWhen the water receiving part is mounted on the main body box body, the sensor input value is above the upper limit threshold value at the time t6The motor of the high-pressure air generating device is driven. That is, if the water receiving unit detached from the main body casing is attached to the main body casing, it is erroneously detected that the hand is inserted into the processing space in the hand insertion unit.
In the hand drying device 1 according to embodiment 1, when the sensor input value is lower than the lower threshold, the control unit 20 determines that the water receiving unit 11 is detached from the main body casing 3, and stops updating the upper threshold and the lower threshold. In the hand drying device 1 according to embodiment 1, when the sensor input value becomes equal to or greater than the lower threshold at the time point when the upper threshold and the lower threshold are updated, the control unit 20 updates the upper threshold and the lower threshold again. Therefore, in the hand drying device 1 according to embodiment 1, the upper limit threshold value is not updated while the water receiving unit 11 is detached from the main body casing 3, and therefore, even when the water receiving unit 11 detached from the main body casing 3 is attached to the main body casing 3, the sensor input value does not become equal to or higher than the upper limit threshold value. Therefore, the hand drying device 1 according to embodiment 1 can prevent erroneous determination that a hand is inserted into the processing space in the hand insertion portion 2 due to an increase in the sensor input value when the water receiving portion 11 is attached to the main body casing 3.
Further, the control unit 20 may perform processing of emitting at least one of an alarm light and an alarm sound when the sensor input value is lower than the lower threshold for a certain period of time, and notify the user that the water receiving unit 11 is not attached. By emitting an alarm light or an alarm sound in a state where the water receiving portion 11 is not attached, the user can be prompted to reattach when the water receiving portion 11 is detached. Further, the control unit 20 may decrease the operation intensity of the high-pressure air generator 4 or stop the operation when the sensor input value is lower than the lower threshold value for a certain period. By reducing the operation strength of the high-pressure air generating apparatus 4 or stopping the operation in a state where the water receiving portion 11 is not attached, the amount of water blown off by hand in a state where the water receiving portion 11 is not attached can be reduced, and the water is less likely to be scattered on the ground.
Embodiment mode 2
The hand drying device 1 according to embodiment 2 of the present invention has the same configuration as the hand drying device 1 according to embodiment 1. The hand drying device 1 according to embodiment 2 fixes the lower threshold to the 3 rd fixed value regardless of the reference value. In the hand drying device 1 according to embodiment 2, when the water receiving unit 11 is detached when the power is turned on, the sensor input value is lower than the lower threshold, and therefore the control unit 20 determines that the water receiving unit 11 is detached from the main body casing 3. At this time, the control unit 20 sets the upper threshold to the 4 th fixed value regardless of the reference value.
Fig. 5 is a flowchart showing a process flow of hand detection determination in the hand drying device according to embodiment 2. When the power is turned on, the control unit 20 determines whether or not the water receiving unit 11 is attached to the main body casing 3 in step S11. When the sensor input value is equal to or greater than the fixed value No. 3, which is the lower limit threshold, the control unit 20 determines that the water receiving unit 11 is attached to the main body casing 3, and the process proceeds to step S12. In step S12, the control unit 20 updates the reference value. In step S13, the control unit 20 sets the upper threshold value to a value obtained by adding the 1 st fixed value to the reference value, and proceeds to step S15.
If the sensor input value is lower than the 3 rd fixed value as the lower threshold in step S11, the control unit 20 determines that the water receiving unit 11 is not attached to the main body casing 3, and proceeds to step S14. In step S14, the control unit 20 sets the upper threshold value to the 4 th fixed value, and proceeds to step S15.
In step S15, the control unit 20 determines whether or not the 1 st set time has elapsed since the upper threshold was set. When the 1 st set time has elapsed since the threshold was set, the process proceeds to step S16. In step S16, the control unit 20 determines whether or not the water receiving unit 11 is attached to the main body casing 3. If the sensor input value is not less than the lower threshold, the control unit 20 determines that the water receiving unit 11 is attached to the main body casing 3, and the process proceeds to step S17. In step S17, the control unit 20 updates the reference value. In step S18, the control unit 20 updates the upper threshold value and proceeds to step S15. The upper threshold is set to a value obtained by adding a 1 st fixed value to a reference value. If the sensor input value is lower than the lower threshold in step S16, the control unit 20 determines that the water receiving unit 11 is not attached to the main body casing 3, and the process proceeds to step S19. In step S15, if the 1 st set time has not elapsed since the upper threshold was set, the process proceeds to step S19, and the controller 20 determines hand detection. When the sensor input value is lower than the upper threshold, the control unit 20 determines that the hand is not inserted into the processing space in the hand insertion unit 2, and returns to step S15. When the sensor input value exceeds the upper threshold, the control unit 20 determines that the hand is inserted into the processing space in the hand insertion unit 2, drives the motor 7 for a fixed time in step S20, and proceeds to step S15.
Through the above steps, it is possible to determine whether or not the water receiving unit 11 is attached at the time point when the power is turned on. In addition, even when water receiving unit 11 is attached after power-on, it is possible to prevent erroneous determination that a hand is inserted into the processing space in hand insertion unit 2.
Fig. 6 is a timing chart of hand detection determination in the hand drying device according to embodiment 2. In fig. 6, the change in the upper limit threshold value is indicated by a broken line of a thick line, the change in the lower limit threshold value is indicated by a one-dot chain line of a thick line, and the sensor input value is indicated by a solid line. Time t0、t1、t2、t3、t4、t5、t6、t7Is the update period of the upper threshold. At time t0The power is turned on, but since the sensor input value is lower than the lower threshold value, the upper threshold value is set to the 4 th fixed value. At time t1、t2The control unit 20 updates the reference value, but does not update the upper threshold. At time t2aWhen the water receiving portion 11 is attached to the main body case 3, the sensor input value exceeds the lower threshold. At time t3、t4、t5The control unit 20 updates the reference value and updates the upper threshold. At time t5aWhen the water receiving portion 11 is detached from the main body case 3, the sensor input value is lower than the lower threshold. At time t6、t7Since the sensor input value is lower than the lower threshold, the control unit 20 updates the reference value, but does not update the upper threshold.
In fig. 6, a change in the upper limit threshold in the hand drying device 1 of embodiment 1 is indicated by a thin broken line, and a change in the lower limit threshold is indicated by a thin one-dot chain line. In the hand drying device 1 of embodiment 1, at time t0When the power is turned on, the control unit 20 sets the upper threshold and the lower threshold to values based on the reference values. Therefore, in the hand drying device 1 according to embodiment 1, the water receiving portion 11 is detached at time t0、t1、t2At time t when water receiving part 11 is mounted on main body case 33、t4、t5The upper and lower thresholds are set to be smaller than the reference value at time t when the water receiving part 11 is attached to the main body casing 33、t4、t5A small value. At time t when water receiving part 11 is attached to main body casing 32aThe upper and lower thresholds are set to be higher than the time t at which the water receiving part 11 is attached to the main body casing 33、t4、t5A small value, when the water receiving part 11 is attached to the main body casing 3, the sensor input value exceeds the upper limit threshold value, and therefore, at time t3The control unit 20 erroneously detects that a hand is inserted into the processing space in the hand insertion unit 2.
In the hand drying device 1 according to embodiment 2, even if the water receiving unit 11 is attached to the main body casing 3 with the upper threshold set to the 4 th fixed value, the sensor input value is lower than the upper threshold, and therefore the control unit 20 does not erroneously detect that a hand is inserted into the processing space in the hand insertion unit 2. When the water receiving unit 11 is attached to the main body casing 3, the sensor input value exceeds the lower threshold, and therefore the control unit 20 starts updating the upper threshold, and can determine whether or not the water receiving unit 11 is attached to the main body casing 3.
The hand dryer according to embodiment 3 of the present invention has the same configuration as that of embodiment 2. The hand drying device of embodiment 3 sets the lower threshold to the 3 rd fixed value only when the power is turned on, and if the sensor input value lower than the lower threshold at the time of power-on becomes the lower threshold or more for the first time after the power is turned on, the lower threshold is set to a value obtained by subtracting the 2 nd fixed value from the reference value.
The hand dryer according to embodiment 3 can determine whether or not the water receiving unit 11 is attached when the power is turned on. Even if the water receiving unit 11 is detached from the main body casing 3 at the time of power-on and then the water receiving unit 11 is attached to the main body casing 3, it is possible to prevent erroneous determination that the hand is inserted into the processing space in the hand insertion unit 2. In addition, when the water receiving unit 11 detached from the main body casing 3 is attached to the main body casing 3 after the power is turned on, the lower limit threshold is updated to the value calculated based on the reference value, and therefore, the accuracy of determining whether or not the water receiving unit 11 is attached to the main body casing 3 can be improved in consideration of the influence of the surrounding environment.
Embodiment 4
The hand dryer according to embodiment 4 of the present invention has the same configuration as that of embodiment 2. In the hand drying device according to embodiment 4, the control unit 20 stores a reference value in a nonvolatile manner, and when the power is turned on, the upper threshold and the lower threshold are set to values calculated based on the stored reference value.
The reference value stored in the control unit 20 in a nonvolatile manner may be an average value of the reference values in a state where the power is turned on last time and the water receiving unit 11 is attached to the main body casing 3. The reference value stored in the control unit 20 in a nonvolatile manner may be a central value of the reference value in a state where the water receiving unit 11 was attached to the main body casing 3 in the previous power-on state.
In the hand drying device according to embodiment 4, since the average value of the reference values stored in a nonvolatile manner is used for setting the upper threshold and the lower threshold at the time of power-on, the threshold setting can be performed with higher accuracy than the threshold setting in which fixed values are set for the upper threshold and the lower threshold at the time of power-on.
The functions of the control unit 20 according to embodiments 1 to 4 are realized by a processing circuit. The processing circuit may be dedicated hardware or an arithmetic device that executes a program stored in a storage device.
When the processing circuit is dedicated hardware, the processing circuit corresponds to a single circuit, a complex circuit, a programmed processor, a parallel programmed processor, an application specific integrated circuit, a field programmable gate array, or a circuit in which these are combined. Fig. 7 is a diagram showing a configuration in which the functions of the control unit according to any one of embodiments 1 to 4 are realized by hardware. The processing circuit 29 incorporates a logic circuit 29a that realizes the function of the control unit 20.
When the processing circuit 29 is an arithmetic device, the function of the control unit 20 is realized by software, firmware, or a combination of software and firmware.
Fig. 8 is a diagram showing a configuration in which the functions of the control unit according to any one of embodiments 1 to 4 are realized by software. The processing circuit 29 has an arithmetic device 291 that executes the program 29b, a random access memory 292 in which the arithmetic device 291 is used for a work area, and a storage device 293 that stores the program 29 b. The arithmetic device 291 realizes the function of the control unit 20 by expanding and executing the program 29b stored in the storage device 293 in the random access memory 292. The software or firmware is described in a programming language and stored in the storage device 293. The arithmetic device 291 may be a central processing unit, but is not limited thereto.
The processing circuit 29 reads and executes the program 29b stored in the storage device 293, thereby realizing the function of the control unit 20. The program 29b can also be said to be a program for causing a computer to execute a procedure and a method for realizing the functions of the control unit 20.
Further, the processing circuit 29 may be partly implemented by dedicated hardware and partly implemented by software or firmware.
In this way, the processing circuit 29 can implement the functions described above by hardware, software, firmware, or a combination thereof.
The configuration described in the above embodiment is an example of the contents of the present invention, and may be combined with other known techniques, and a part of the configuration may be omitted or modified within a range not departing from the gist of the present invention.
Description of reference numerals
1 hand drying device, 2 hand insertion part, 3 body box, 4 high pressure air generating device, 5 air nozzle, 7 motor, 8 upper jaw part, 9 window, 10 hand detection sensor, 11 water receiving part, 11a communication channel, 11b opening part, 12 liquid discharging container, 20 control part, 29 processing circuit, 29a logic circuit, 29b program, 291 arithmetic device, 292 random access memory and 293 storage device.
Claims (11)
1. A hand drying device is characterized in that,
the disclosed device is provided with:
a body case provided with a hand insertion portion;
a high pressure air generating device which is arranged inside the body box body and generates high pressure air;
a nozzle that converts the high-pressure air into an air flow and ejects the air flow to a processing space in the hand insertion portion;
a water receiving unit which is detachable from the main body casing and collects water blown by the air flow from the hand inserted into the processing space inside the hand insertion unit;
a hand detection sensor provided in the hand insertion portion and including an infrared light emitting element that emits infrared light and an infrared light receiving element that outputs a signal indicating a light receiving amount of the infrared light; and
a control part for judging whether a hand is inserted into the processing space or not, and driving the high-pressure air generating device when the hand is inserted into the processing space,
the control part
Updating an upper threshold value, which is a threshold value for determining whether or not a hand is inserted into the processing space, based on a sensor input value indicating the amount of received infrared light indicated by the signal input from the hand detection sensor,
determining that a hand is inserted into the processing space when the sensor input value is equal to or greater than the upper threshold,
when the sensor input value is equal to or less than a lower threshold, which is a threshold for determining whether or not the amount of infrared light received by the water receiving portion is attached to the main body casing, the update of the upper threshold is stopped.
2. Hand drying apparatus according to claim 1,
the control unit periodically updates the lower threshold value based on the sensor input value,
and stopping updating the lower threshold when the sensor input value is equal to or less than the lower threshold.
3. Hand drying apparatus according to claim 1,
the control unit sets the lower threshold to a fixed value when the water receiving unit is detached from the main body casing at the time of power-on, periodically updates the lower threshold based on the sensor input value after the water receiving unit is attached to the main body casing, and stops updating the lower threshold when the sensor input value is equal to or less than the lower threshold.
4. Hand drying apparatus according to claim 1,
the control unit sets the lower threshold to a fixed value.
5. Hand drying apparatus according to any one of claims 1 to 4,
the control unit sets the upper threshold to a fixed value when the water receiving unit is detached from the main body case at the time of power-on.
6. Hand drying apparatus according to claim 1,
the control unit stores the past sensor input value, and sets the upper threshold value and the lower threshold value based on the stored past sensor input value when the power supply is turned on.
7. Hand drying apparatus according to any one of claims 1 to 4, 6,
the control unit sets the upper threshold and the lower threshold based on the stored past sensor input value when the water receiving unit is detached from the main body case at the time of power-on, and periodically updates the upper threshold and the lower threshold based on the current sensor input value after the water receiving unit is attached to the main body case.
8. Hand drying apparatus according to any one of claims 1 to 4, 6,
the control unit performs a process of emitting an alarm light when the sensor input value is lower than the lower threshold value for a predetermined period.
9. Hand drying apparatus according to any one of claims 1 to 4, 6,
the control unit performs a process of generating an alarm sound when the sensor input value is lower than the lower threshold for a predetermined period.
10. Hand drying apparatus according to any one of claims 1 to 4, 6,
the control unit may decrease the operation intensity of the high-pressure air generator when the sensor input value is lower than the lower threshold value for a predetermined period.
11. Hand drying apparatus according to any one of claims 1 to 4, 6,
the control unit stops the operation of the high-pressure air generator when the sensor input value is lower than the lower threshold value for a predetermined period.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2017/042206 WO2019102582A1 (en) | 2017-11-24 | 2017-11-24 | Hand dryer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111356392A CN111356392A (en) | 2020-06-30 |
| CN111356392B true CN111356392B (en) | 2021-11-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201780096201.8A Active CN111356392B (en) | 2017-11-24 | 2017-11-24 | Hand drying device |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP6854918B2 (en) |
| CN (1) | CN111356392B (en) |
| WO (1) | WO2019102582A1 (en) |
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|---|---|---|---|---|
| JP2005177151A (en) * | 2003-12-19 | 2005-07-07 | Mitsubishi Electric Corp | Hand dryer |
| CN101035455A (en) * | 2005-07-26 | 2007-09-12 | 三菱电机株式会社 | Hand dryer |
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| CN203182818U (en) * | 2010-08-18 | 2013-09-11 | 三菱电机株式会社 | Hand drying device |
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| CN203468480U (en) * | 2010-09-13 | 2014-03-12 | 三菱电机株式会社 | Hand drying device |
| CN107708510A (en) * | 2015-07-14 | 2018-02-16 | 三菱电机株式会社 | Drying apparatus for hands |
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| JP3148435B2 (en) * | 1993-01-20 | 2001-03-19 | 三菱電機株式会社 | Hand drying equipment |
| JP2005207012A (en) * | 2004-01-20 | 2005-08-04 | Seiko Precision Inc | Automatic faucet and detecting sensor |
| CN101061928A (en) * | 2005-07-26 | 2007-10-31 | 三菱电机株式会社 | Drying apparatus for hands |
| JP5659401B2 (en) * | 2009-12-25 | 2015-01-28 | パナソニックＩｐマネジメント株式会社 | Hand dryer |
| JP6459147B2 (en) * | 2015-09-17 | 2019-01-30 | Toto株式会社 | Hand dryer |
-
2017
- 2017-11-24 WO PCT/JP2017/042206 patent/WO2019102582A1/en active Application Filing
- 2017-11-24 JP JP2019556048A patent/JP6854918B2/en active Active
- 2017-11-24 CN CN201780096201.8A patent/CN111356392B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005177151A (en) * | 2003-12-19 | 2005-07-07 | Mitsubishi Electric Corp | Hand dryer |
| CN101035455A (en) * | 2005-07-26 | 2007-09-12 | 三菱电机株式会社 | Hand dryer |
| JP2010246581A (en) * | 2009-04-10 | 2010-11-04 | Panasonic Corp | Hand detecting and drying device |
| CN203182818U (en) * | 2010-08-18 | 2013-09-11 | 三菱电机株式会社 | Hand drying device |
| CN203220313U (en) * | 2010-09-13 | 2013-10-02 | 三菱电机株式会社 | Hand drying device |
| CN203468480U (en) * | 2010-09-13 | 2014-03-12 | 三菱电机株式会社 | Hand drying device |
| CN107708510A (en) * | 2015-07-14 | 2018-02-16 | 三菱电机株式会社 | Drying apparatus for hands |
Also Published As
| Publication number | Publication date |
|---|---|
| JP6854918B2 (en) | 2021-04-07 |
| JPWO2019102582A1 (en) | 2020-04-02 |
| WO2019102582A1 (en) | 2019-05-31 |
| CN111356392A (en) | 2020-06-30 |
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