JP2019088978A - Hand dryer - Google Patents

Abstract

To provide a hand dryer capable of discharging residual charge in a simple configuration.SOLUTION: The hand dryer includes: a hand insertion section enabling a hand to be inserted thereinto; a blow-out port blowing out air into the hand insertion part; a function section including a hand detection part detecting the hand inserted into the hand insertion part and an air supply part supplying air to the blow-out port; a control section operating the air supply part according to detection of a hand and stopping operation of the air supply part according to cancellation of the detection of a hand; a power source circuit connected to a power supply source via a power source line, converting power supplied from the power supply source according to the control section, and supplying power after conversion to the control section; and a power source monitoring section monitoring a state of power supplied from the power supply source and inputting a monitoring result to the control section. The control section discharges residual charge accumulated in the power source circuit to the function section when the monitoring result is brought into a stop state expressing stop of power supply.SELECTED DRAWING: Figure 1

Description

  Aspects of the invention generally relate to a hand dryer.

  There is a hand dryer that is attached to the wall of a toilet room and used to dry the user's hand after hand washing. The hand dryer includes a concave hand insertion unit into which the user's hand is inserted, and a hand detection unit that detects the user's hand inserted into the hand insertion unit. The hand dryer detects a hand inserted into the hand insertion unit and blows a wind toward the inserted hand. Thus, the hand dryer dries the user's hand by blowing air toward the user's hand and blowing off the water droplets adhering to the hand.

  Such a hand dryer does not need to clean up or refill paper towels after use, for example, compared to preparing paper towels etc., and is easy to manage, so it can be used for toilets and washrooms in public facilities. It is used suitably.

  The hand dryer has a power supply line provided with a connection of a predetermined shape. The hand dryer is connected to the power supply source through the power supply line, for example, by connecting the connection part of the power supply line to a connected part provided on a wall surface or the like of the toilet room. The hand dryer operates with power supplied from a power supply. The connection portion is, for example, an outlet plug, and the connection portion is, for example, an outlet (socket). The power supply source is, for example, a commercial power supply. The hand dryer operates, for example, by supplying AC power from a commercial power source.

  In the hand dryer, after the connection state between the connection portion and the connection portion is released, residual charge accumulated in an internal power supply circuit or the like may appear in the connection portion. Under the present circumstances, if a user grasps a connection part, it may become a cause of an electric shock accident. In the case of a hand dryer installed around water, there is a concern that the connection portion where the residual charge appears may be grasped with a wet hand, or an electric shock accident may occur through the surrounding water. For this reason, in the hand dryer, measures against residual charge are required.

  For example, it has been proposed to detect the zero cross of the commercial power supply and discharge the residual charge to the discharge resistor (load) when the commercial power supply is at a predetermined voltage or less for a predetermined period (for example, for example) , Patent Document 1).

  However, in the configuration in which a discharge resistor is separately provided, a resistor for discharge and a circuit for discharge for supplying residual charge to the resistor for discharge are required, and the circuit configuration of the hand dryer becomes complicated. . For example, it causes an increase in the manufacturing cost of the hand dryer. For this reason, in the hand dryer, it is desirable to be able to discharge the residual charge with a simple configuration.

JP 2005-201587 A

  The present invention is made based on recognition of such a subject, and an object of the present invention is to provide a hand dryer which can discharge residual electric charge by easy composition.

According to a first aspect of the present invention, there is provided a hand insertion portion into which a user's hand can be inserted, a blowout port for blowing a wind into the hand insertion portion, and a hand detection portion detecting a hand inserted into the hand insertion portion. A gas supply unit that supplies gas to the blowout port and blows air from the blowout port; and operating the gas supply unit according to detection of a hand by the hand detection unit; To the power supply source via a power supply line having a control unit for stopping the operation of the gas supply unit in response to cancellation of hand detection due to the power supply connection, and a connection unit detachably connected to the connected unit of the power supply source. A power supply circuit connected, converting power supplied from the power supply source into power corresponding to the control unit, and supplying the converted power to the control unit, and a state of power supplied from the power supply source Monitor and input the monitoring result to the control unit A source monitoring unit, wherein the control unit discharges the residual charge accumulated in the power supply circuit to the functional unit when the monitoring result is in a stop state indicating stop of power supply, and the control is performed The unit does not discharge the residual charge even when the monitoring result becomes the stopped state, and the discharge mode for discharging the residual charge when the monitored result is the stopped state. And a discharge mode, wherein the discharge mode and the non-discharge mode can be selectively set.

According to the hand dryer, the residual charge accumulated in the power supply circuit is discharged to the functional unit when the monitoring result is in the stop state representing the stop of the power supply. Therefore, it is not necessary to separately provide a discharge resistor or the like, and the residual charge can be discharged with a simple configuration. For example, the security can be enhanced without increasing the manufacturing cost of the hand dryer.
In addition, according to this hand dryer, when it is not necessary to discharge, for example, when the power supply line is directly connected to a switchboard or the like, useless discharge mode is set by setting the non-discharge mode. Can be suppressed. For example, an increase in power consumption due to useless discharge can be further suppressed.

  In a second aspect based on the first aspect, the control unit operates at least one of the hand detection unit and the gas supply unit when the monitoring result is in the stop state, and the hand detection is performed. It is a hand dryer characterized by discharging said residual charge to said at least one of a part and said gas supply part.

  According to this hand dryer, by discharging the hand detection unit or the gas supply unit, it is possible to discharge gently when discharging using the hand detection unit, and it is possible to use the gas supply unit. When discharging, it is possible to discharge instantaneously because the impedance is low. In addition, by discharging the hand detection unit and the gas supply unit, it is not necessary to separately provide a discharge resistor or the like, and the residual charge can be discharged with a simple configuration.

  According to a third invention, in the first invention, the functional unit further includes a heating unit configured to heat the gas supplied from the gas supply unit, and the control unit is configured to stop the monitoring result. In the case of a hand dryer, the heating unit is operated to discharge the residual charge to the heating unit.

  According to this hand dryer, it is not necessary to separately provide a resistor or the like for discharging by discharging the heating unit, and it is possible to discharge the residual charge with a simple configuration. Furthermore, in the case of discharging the heating unit, the residual charge can be discharged quietly and instantaneously.

  In a fourth invention according to any one of the first to third inventions, the control unit discharges the residual charge to the functional unit when the stop state is continued for a predetermined time. It is a hand dryer characterized by

  According to this hand dryer, for example, it is possible to suppress discharge due to temporary voltage fluctuation due to instantaneous power failure of the power supply source or the like. For example, increase in power consumption due to useless discharge can be suppressed.

  A fifth invention is the hand dryer according to the fourth invention, wherein the control unit changes the predetermined time according to a load of the functional unit which discharges the residual charge.

  According to this hand dryer, by changing the time from the time when the monitoring result is stopped to the time when the discharge is actually performed according to the load, for example, a specific time while suppressing unnecessary discharge The discharge can be properly completed within.

  In a sixth aspect according to the fourth aspect, the control unit stops the operation of the functional unit when the monitoring result is in the stop state while the functional unit is operating. It is a hand dryer characterized by storing a state of operation of the functional unit, and resuming operation of the stored functional unit when the stopped state is canceled within the predetermined time.

  According to this hand dryer, when the monitoring result is stopped while the functional unit is operating, the operation of the functional unit is stopped, for example, an unexpected operation stop due to the loss of the power supply. It is possible to suppress and enhance the safety of the hand dryer.

  Further, when the stopped state is obtained, the operation state of the functional unit is stored, and when the stopped state is canceled within a predetermined time, the operation of the stored functional unit is resumed, for example, an instantaneous power failure. Even when the operation is temporarily stopped due to the situation, the waiting time of the user until the operation is resumed can be shortened, and the deterioration of the usability of the hand dryer can be suppressed.

  A seventh invention according to any one of the first to the sixth inventions, further includes: a storage unit storing the number of times the monitoring result has been in the stopped state; and a display unit capable of displaying the number. The control unit may add the number of times stored in the storage unit when the monitoring result is in the stopped state, and the number of times stored in the storage unit according to a predetermined operation. It is a hand dryer characterized by displaying on a display part.

  According to this hand dryer, for example, an abnormality of the power supply source can be grasped by displaying the number of times of the stop state on the display unit. For example, the state of operation of the hand dryer can be diagnosed. It is easy to take measures against abnormalities in the power supply source.

  An eighth invention is the hand drying device according to the first invention, further comprising a display unit capable of displaying the setting of the discharge mode and the non-discharge mode of the control unit.

  According to this hand dryer, for example, the user can be made aware of the settings of the discharge mode and the non-discharge mode, and can set the appropriate mode. Erroneous setting of the discharge mode and the non-discharge mode can be suppressed.

  In a ninth invention according to any one of the first to eighth inventions, the power supplied from the power supply source is AC power, and the power supply monitoring unit detects a zero cross of the AC power. The hand dryer according to claim 1, wherein the detection result of the zero cross is input to the control unit as the monitoring result, and the control unit determines the stopped state when the zero cross is not detected for a predetermined period. is there.

  According to this hand dryer, it is possible to appropriately determine the stop of the power supply from the power supply source.

  According to an aspect of the present invention, a hand dryer capable of discharging residual charge with a simple configuration is provided.

It is a perspective view showing the hand dryer concerning a 1st embodiment. It is a longitudinal cross-sectional view showing the hand dryer concerning 1st Embodiment. It is a top view showing the hand dryer concerning a 1st embodiment. It is a block diagram showing the electric constitution of the hand dryer concerning a 1st embodiment. It is a block diagram showing an example of the zero crossing detection part concerning a 1st embodiment. FIG. 6A and FIG. 6B are graphs showing an example of the operation of the zero cross detection unit according to the first embodiment. It is a flowchart showing an example of operation | movement of the hand dryer concerning 1st Embodiment. FIGS. 8A and 8B are timing charts showing an example of the operation of the hand dryer according to the first embodiment. It is a flowchart showing an example of operation | movement of the hand dryer concerning 2nd Embodiment. FIG. 10A to FIG. 10D are timing charts illustrating an example of the operation of the hand dryer according to the second embodiment. It is a block diagram showing the electrical configuration of the hand dryer concerning 3rd Embodiment. 12 (a) to 12 (f) are timing charts showing an example of the operation of the hand dryer according to the third embodiment. It is a flowchart showing an example of operation | movement of the hand dryer concerning 4th Embodiment. It is a block diagram showing the electric constitution of the hand dryer concerning 5th Embodiment. It is a flowchart showing an example of operation | movement of the hand dryer concerning 6th Embodiment.

Hereinafter, embodiments will be described with reference to the drawings. In the drawings, the same components are denoted by the same reference numerals and the detailed description will be appropriately omitted.
First Embodiment
FIG. 1 is a perspective view showing a hand dryer according to a first embodiment.
FIG. 2 is a longitudinal sectional view showing the hand dryer according to the first embodiment.
As shown in FIGS. 1 and 2, the hand dryer 10 includes a main body 12. The body portion 12 has a concave hand insertion portion 14 in which the user's hand can be inserted. FIG. 2 shows a vertical cross section near the center in the horizontal direction of the hand dryer 10 (main body 12). Moreover, in FIG. 2, the flow of wind (gas) is shown by the arrow.

The hand dryer 10 is attached to, for example, a wall surface of a toilet room and used. The hand dryer 10 detects the hand inserted in the hand insertion unit 14 and blows a wind on the hand in the hand insertion unit 14.
Thus, the hand dryer 10 dries the wet hands by hand washing after use of the toilet, for example.

  The hand insertion portion 14 opens upward, for example. The main body 12 has, for example, an open box shape opened upward. Therefore, the user inserts a hand into the hand insertion portion 14 from the top to the bottom. The opening direction of the hand insertion portion 14 is not limited to the upper side, and may be, for example, the front or the front side obliquely upward. The opening direction of the hand insertion portion 14 may be any direction in which the user can easily insert a hand.

Moreover, the opening shape of the hand insertion part 14 is laterally long. The lateral length of the opening of the hand insertion portion 14 is longer than the length of the opening of the hand insertion portion 14 in the front-rear direction. Thereby, in the hand dryer 10, it can insert in the hand insertion part 14 from upper direction in the state which arranged the hand on either side in the horizontal direction.
That is, the user may drop both hands downward and insert it into the hand insertion portion 14, and the hand can be dried in a natural posture.

  The main body 12 has a front surface 12a, a back surface 12b, and a pair of side surfaces 12c and 12d. In this example, the main body 12 has a substantially rectangular box shape. The hand insertion portion 14 is, for example, a substantially rectangular recess whose front, rear, and both sides are surrounded by the front surface 12a, the back surface 12b, and the side surfaces 12c and 12d.

  The hand insertion portion 14 includes an inner side 14a on the front side formed by the front side 12a, an inner side 14b on the rear side formed by the rear side 12b, and a bottom 14c continuous with lower ends of the inner sides 14a and 14b. And. Further, both side ends of the inner side surfaces 14a and 14b and the bottom surface 14c are closed by the side surface portions 12c and 12d. The hand insertion unit 14 receives water droplets blown off from wet hands on each side.

  The lateral width of the opening of the hand insertion portion 14 is, for example, 30 cm (25 cm or more and 50 cm or less). The width in the front-rear direction of the opening of the hand insertion portion 14 is, for example, 15 cm (8 cm or more and 20 cm or less). Thereby, for example, the user of any physique can insert both hands into the hand insertion portion 14 to dry the hand.

  The shapes of the main body portion 12 and the hand insertion portion 14 are not limited to the above, and may be any shape into which a hand can be inserted. For example, each side 12c, 12d may be omitted. That is, the hand insertion portion 14 may be in the shape of a groove opened upward and on both sides. As described above, the shape of the hand insertion portion 14 may be a shape in which a part other than the opening for inserting the hand is opened.

  The main body 12 has a plurality of outlets 15 and 16 for blowing the wind into the hand insertion portion 14. The outlet 15 is provided on the inner side surface 14a. The outlet 16 is provided on the inner side surface 14 b. Each of the outlets 15 and 16 is, for example, a substantially circular opening. In addition, a plurality of blowout ports 15 and 16 are provided in the main body 12. The plurality of outlets 15 are arranged in a substantially straight line in the lateral direction (horizontal direction) and provided on the inner side surface 14 a. The plurality of outlets 16 are provided on the inner side surface 14 b side by side in a substantially straight line in the lateral direction.

  The outlets 15 and 16 are provided, for example, in the vicinity of the upper ends (opening ends) of the inner side surfaces 14a and 14b, and blow the wind obliquely downward. That is, the outlets 15, 16 blow water droplets toward the bottom surface 14c. As a result, it is possible to suppress that the blown water droplets get on the user.

  The shape of the outlets 15 and 16 may be any shape. The number of outlets 15, 16 may be any number. For example, one slit-like outlet extending in the lateral direction may be provided in the main body 12. The outlet may have any shape and number that can blow the wind appropriately to the hand inserted into the hand insertion portion 14.

  The main body 12 has, for example, a pair of vents 18 provided in each side 12c, 12d. The air vents 18 allow the air blown out from the air outlets 15 and 16 to escape to the outside of the hand insertion portion 14. Thereby, for example, it is possible to suppress that a wind containing water droplets is folded back in the hand insertion portion 14 and is directed to the user side. In other words, it is possible to suppress that the blown water droplets are directed toward the user. Further, each vent 18 is provided with a plurality of louvers 18 a. Each louver 18 a, for example, prevents the water droplets from leaking out through the vents 18.

  The hand dryer 10 further includes a water receiving tray 20 and a functional unit 21. The functional unit 21 is provided in the main unit 12. The functional unit 21 provides the main unit 12 with various functions related to drying of the hand. The functional unit 21 includes, for example, the fan motor unit 22, the air ducts 23 and 24, the fin heater 26, the filter 28, the air intake duct 30, the sound absorbing material 32, the illumination unit 34, and the hand detection unit 40. Have.

  The water receiving tray 20 is, for example, detachably attached to the bottom of the main body 12. The main body portion 12 has drain grooves not shown, and sends the water droplets received on each surface of the hand insertion portion 14 to the water receiving tray 20 through the drain grooves. Thus, the water receiving tray 20 collects the water droplets blown off in the hand insertion unit 14.

  The fan motor unit 22 is a gas supply unit that supplies a gas to each of the outlets 15 and 16 and causes the air to be blown out from the outlets 15 and 16. The fan motor unit 22 has a rotational drive shaft 22a. The rotational drive shaft 22 a of the fan motor unit 22 is arranged to extend in a direction perpendicular to the front surface 12 a and the rear surface 12 b of the main body 12.

  Further, at the upstream end of the casing of the fan motor unit 22, a suction port 22b is provided. An outlet 22 c is provided at the downstream end of the fan motor unit 22. The outlet 22c is formed to open upward. The supply of gas to the outlets 15 and 16 is not limited to the fan motor unit 22, and any fan or pump capable of supplying gas may be used.

  The air duct 23 is provided on the front side of the main body 12, and sends the gas supplied from the fan motor unit 22 to the front air outlets 15. The air duct 24 is provided on the back side of the main body 12, and sends the gas supplied from the fan motor unit 22 to the respective outlets 16 on the back side. That is, the air duct 23 connects between the air outlet 22 c and each air outlet 15, and the air air duct 24 connects between the air outlet 22 c and each air outlet 16. Thereby, the gas supplied from the fan motor unit 22 is sent to the outlets 15 and 16 and blown out from the outlets 15 and 16.

  For example, when using the hand dryer 10, the air flow ducts 23 and 24 are cut off so that the air volume supplied to the front side (palm side) becomes larger than the air volume supplied to the back side (airside) The area is set. The flow passage cross-sectional area is the cross-sectional area of the opening portion through which the gas passes in the air blowing ducts 23 and 24. For example, the minimum flow passage cross-sectional area of the air flow duct 23 is larger than the minimum flow passage cross-sectional area of the air flow duct 24. As a result, the flow rate of the gas flowing to the air blowing duct 23 side becomes larger than the flow rate of the gas flowing to the air blowing duct 24 side, and the air volume on the front side becomes larger than the air volume on the back side.

  The fin heater 26 is provided at the outlet 22 c of the fan motor unit 22. The fin heater 26 heats the gas (air) blown out from the blowout port 22c. That is, the fin heater 26 is a heating unit that heats the gas supplied from the fan motor unit 22. In the hand dryer 10, the warm air warmed by the fin heater 26 can be blown out from the outlets 15 and 16. Thereby, for example, the drying performance of the user's hand can be improved. For example, the user's hand can be dried in a shorter time as compared with blowing unheated wind. The fin heater 26 is provided as needed and can be omitted. The hand dryer 10 may blow the non-heated air supplied from the fan motor unit 22 from the outlets 15 and 16. The heating unit for warming the gas supplied from the fan motor unit 22 is not limited to the fin heater 26, and may be any heater capable of heating the gas.

  As described above, the water receiving tray 20 is removably attached to the bottom of the main body 12. Further, at the bottom of the main body 12, an air inlet 12e for taking in gas from the outside is provided. The air inlet 12 e is provided at the bottom of the main body 12 on the back side of the water receiving tray 20. The filter 28 is provided in the intake port 12e. The filter 28 suppresses the entry of dust and the like into the main body 12.

  The intake duct 30 is connected to the intake port 12e. The upstream end 30a of the intake duct 30 is disposed on the filter 28 of the intake 12e. The intake duct 30 brings the upstream end 30a into communication with the intake port 12e, and extends substantially straight upward from the upstream end 30a along the back surface 12b of the main body 12.

  The sound absorbing material 32 is provided in the upper part in the intake duct 30 adjacent to the inlet 22 b of the fan motor unit 22. The sound absorbing material 32 absorbs the sound leaked from the suction port 22 b during operation of the fan motor unit 22.

  By operating the fan motor unit 22, the hand dryer 10 takes in air outside the main body 12 from the air inlet 12 e and sucks it into the air intake duct 30 via the filter 28. Then, the sucked air is supplied from the fan motor unit 22 to the outlets 15 and 16 through the air ducts 23 and 24. As a result, wind is blown out from the blowout ports 15 and 16.

The illumination unit 34 illuminates the inside of the hand insertion unit 14. For example, when a hand is inserted into the hand insertion unit 14, the illumination unit 34 emits light toward the inside of the hand insertion unit 14 to illuminate the inside of the hand insertion unit 14. Moreover, the illumination part 34 can also be functioned as a display part which displays the operation state of the hand dryer 10, for example by blinking by a predetermined | prescribed pattern. Thus, the illumination unit 34 also has a function as a display unit. As a result, for example, the number of parts of the hand dryer 10 can be reduced, and a decrease in design of the hand dryer 10 caused by the addition of the display unit can be suppressed.

  In this example, two illumination units 34 are provided on the back surface 12b of the main body 12 (see FIG. 1). The two illumination units 34 are arranged side by side in the back direction 12b. The number and arrangement of the illumination units 34 are not limited to this, and any number and arrangement that can appropriately illuminate the inside of the hand insertion unit 14 may be used.

  The hand detection unit 40 detects a hand inserted in the hand insertion unit 14. The hand detection unit 40 includes, for example, a light emitting unit 41 and a light receiving unit 42. The light emitting unit 41 is provided on the front surface 12a. The light receiving unit 42 is provided on the back surface 12 b. For example, the light emitting units 41 are disposed below the outlets 15, and the light receiving unit 42 is disposed below the outlets 16. The light emitting unit 41 and the light receiving unit 42 are disposed at positions facing each other with the hand inserting unit 14 interposed therebetween. The arrangement of the light emitting unit 41 and the light receiving unit 42 is not limited to this, and any arrangement capable of detecting a hand may be used. For example, contrary to the above, the light receiving unit 42 may be provided on the front surface 12 a and the light emitting unit 41 may be provided on the back surface 12 b.

  For example, the light emitting unit 41 emits infrared light as detection light toward the light receiving unit 42. The light receiving unit 42 receives the infrared light emitted from the light emitting unit 41, and outputs a voltage according to the amount of received infrared light (brightness). For the light emitting unit 41, for example, a light emitting diode or a laser diode is used. For the light receiving unit 42, for example, a photodiode is used. The detection light emitted from the light emitting unit 41 is not limited to infrared light, and may be visible light or the like.

  The hand detection unit 40 detects the hand of the user based on the light reception level (output voltage) of the light reception unit 42. The hand detection unit 40 can detect that the hand is not inserted, for example, when the light reception level of the light reception unit 42 is equal to or higher than the threshold. Then, when the light emitted from the light emitting unit 41 is blocked by the hand inserted into the hand insertion unit 14 and the light reception level of the light receiving unit 42 becomes less than the threshold, it can be detected that the hand is inserted.

  In this example, the hand detection unit 40 is a so-called transmission type light sensor (photo interrupter). The hand detection unit 40 is not limited to this, and may be any sensor that can detect the hand inserted in the hand insertion unit 14. The hand detection unit 40 may be, for example, a reflection-type light sensor, a distance measurement sensor, a pyroelectric sensor, a capacitance sensor, an ultrasonic sensor, a microwave sensor, or the like.

A power supply line 36 is connected to the main body 12. The power supply line 36 is a so-called power supply cord. The power supply line 36 is detachably connected to the main body 12 via, for example, a connector. The power supply line 36 may be held by the main body 12. The power supply line 36 has a connection 38. The connection portion 38 is provided at the end of the power supply line 36 opposite to the main body 12. The connection portion 38 is detachably connected to the connected portion 4 of the power supply source 2. Thereby, the hand dryer 10
Are connected to the power supply source 2 via the power supply line 36. Each part of the hand dryer 10 is operated by the power supplied from the power supply source 2.

  The connection portion 38 has a pair of terminals 38a and 38b. Each terminal 38a, 38b is parallel plate-like. The connected portion 4 has a pair of insertion holes 4a, 4b corresponding to the respective terminals 38a, 38b of the connection portion 38. The connection portion 38 is connected to the connected portion 4 by inserting the terminals 38 a and 38 b into the insertion holes 4 a and 4 b of the connected portion 4. The power supply line 36 is mechanically held by the connected portion 4 by connecting the connecting portion 38 to the connected portion 4, and is electrically connected to the power supply source 2.

  The connection unit 38 is, for example, an outlet plug, and the connected unit 4 is, for example, an outlet. The connected portion 4 is provided, for example, on a wall surface of a toilet room. The power supply source 2 is, for example, a commercial power source. The power supplied from the power supply source 2 is, for example, AC power.

  The shapes of the connection portion 38 and the connection portion 4 may be any shape that allows mechanical and electrical connection with each other. The power supply source 2 is not limited to a commercial power source, and may be any power source capable of supplying the power necessary for the operation of the hand dryer 10, such as a private generator. The power supplied from the power supply source 2 is not limited to AC power, and may be DC power.

  In this example, the power supply line 36 is connected to the outlet. For example, the power supply line 36 may be directly connected to a switchboard or the like. In this case, for example, the terminals of the switchboard may be used as the connection parts, and the end of the power supply line 36 (the part where the coating is peeled off to expose the conducting wire) may be used as the connection parts.

FIG. 3 is a plan view showing the hand dryer according to the first embodiment.
As shown in FIG. 3, in this example, the hand detection unit 40 includes three light emitting units 41 of a first light emitting unit 41 a to a third light emitting unit 41 c. The light emitting units 41a to 41c are arranged in the lateral direction.
The first light emitting unit 41a is disposed near the center of the front surface 12a in the lateral direction. The second light emitting unit 41 b is disposed near one end of the front surface 12 a in the lateral direction. The third light emitting unit 41 c is disposed near the other end of the front surface 12 a in the lateral direction. The second light emitting portion 41b is disposed near the left end of the front surface portion 12a as viewed from the user side, and the third light emitting portion 41c is disposed near the right end of the front surface portion 12a.

  Each light emitting unit 41 a to 41 c faces the light receiving unit 42. Each of the light emitting units 41 a to 41 c causes the detection light to be incident on the light receiving unit 42. The light receiving unit 42 receives the detection light of each of the light emitting units 41 a to 41 c. The hand detection unit 40 detects that a hand is inserted in the hand insertion unit 14 when the detection light of any of the three light emitting units 41 a to 41 c is blocked.

As described above, the hand detection unit 40 is provided with three light emitting units 41 a to 41 c. Thereby, insertion of the hand to the hand insertion part 14 which has horizontal opening shape can be detected more appropriately. In this example, the second light emitting portion 41b disposed near the left end of the front face portion 12a and the third light emitting portion 41c disposed near the right end of the front face portion 12a are light receiving portions 42 disposed near the center of the back face portion 12b. The detection light is emitted obliquely toward the Thus, the hand detection unit 40 can detect the hand substantially throughout the hand insertion unit 14. Even when the hand is inserted at any position of the hand insertion unit 14, the user's hand can be appropriately detected. Further, in the hand detection unit 40, one light receiving unit 42 is used in common to the three light emitting units 41a to 41c. Thereby, the increase in the number of parts can be suppressed while enhancing the detection performance of the inserted hand.

  The hand detection unit 40 detects a hand at a plurality of detection positions by the plurality of light emitting units 41. In this example, the three light emitting units 41 of the light emitting units 41 a to 41 c detect a hand at three detection positions. In this example, the detection position is a position on the path between the light emitting unit 41 and the light receiving unit 42. In other words, the hand detection unit 40 detects a hand in a plurality of detection areas in the hand insertion unit 14. The detection area is, for example, linear. In this example, the light emitting unit 41 is shown as a sensor unit. The sensor unit is not limited to this, and may be any sensor that can detect a hand. Further, the number of sensor units and detection positions is not limited to three, and may be two or four or more. The number of sensor units and detection positions may be arbitrary.

FIG. 4 is a block diagram showing the electrical configuration of the hand dryer according to the first embodiment.
As shown in FIG. 4, the hand dryer 10 further includes a control unit 44, a power supply circuit 46, and a zero cross detection unit 48 (power supply monitoring unit).

  The power supply circuit 46 is connected to the power supply line 36. The power supply circuit 46 is connected to the power supply source 2 via the power supply line 36 and the terminals 38 a and 38 b of the connection portion 38. The power supply circuit 46 converts the power supplied from the power supply source 2 into the power corresponding to the control unit 44, and supplies the converted power to the control unit 44. The power supply circuit 46 converts, for example, AC power supplied from the power supply source 2 into DC power of a voltage value corresponding to the control unit 44, and supplies the DC power after conversion to the control unit 44.

The power supply circuit 46 includes a charge storage element 50, a rectification unit 52, and a power conversion unit 54.
The charge storage element 50 is connected between the terminals 38a and 38b. The charge storage element 50 functions as, for example, a noise cut filter, and suppresses noise contained in the AC power supplied from the AC power supply 2. The charge storage element 50 is, for example, a capacitor. The capacitance of the charge storage element 50 is, for example, not less than 0.1 μF and not more than 1 μF.

  The rectifying unit 52 rectifies AC power supplied from the power supply source 2. The rectifying unit 52 converts, for example, AC power of the power supply source 2 into pulsed current power. The power conversion unit 54 converts the power rectified by the rectification unit 52 into DC power corresponding to the control unit 44 and the like, and supplies the DC power after conversion to the control unit 44 and the like. The rectification unit 52 and the power conversion unit 54 convert, for example, AC power of AC 100 V (effective value) into DC power of approximately 5 V to 15 V. The control unit 44 is driven by the power supply from the power supply circuit 46.

  An EEPROM 60, a heater on / off switch 61, an air volume selection switch 62, and a power switch 63 are connected to the control unit 44. Each of the switches 61 to 63 has, for example, an operation unit that can be operated by the user, and is provided to the main body 12 in a state in which the operation unit is exposed to the outside of the main body 12.

  The EEPROM 60 is a storage unit that stores various programs, data, and the like necessary for controlling the hand dryer 10. The control unit 44 reads out various programs from, for example, the EEPROM 60 and sequentially processes them to control each part of the hand dryer 10 in an integrated manner.

  The heater on / off switch 61 inputs a signal indicating whether the fin heater 26 is used to the control unit 44. When a signal indicating use of the fin heater 26 is input from the heater on / off switch 61, the control unit 44 drives the fin heater 26 when driving the fan motor unit 22, and the blowout ports 15, 16. Blow hot air from the house. On the other hand, when a signal indicating non-use of the fin heater 26 is input from the heater on / off switch 61, the control unit 44 does not drive the fin heater 26 even when driving the fan motor unit 22. Unheated wind is blown out from the blowout ports 15 and 16.

  The air volume switching switch 62 inputs, to the control unit 44, a signal indicating the setting of the air volume of the wind blown out from the outlets 15, 16. The control unit 44 changes the flow rate of the wind blown out from each of the blowout ports 15 and 16 stepwise or continuously by changing the drive condition of the fan motor unit 22 according to the setting of the flow rate switch 62, for example. .

  The power switch 63 switches power to the hand dryer 10 on and off. For example, when the power switch 63 is switched on, the power supply circuit 46 supplies power to the control unit 44 via the operation, and the control unit 44 starts the operation. That is, the hand dryer 10 is ready for use. The power switch 63 may be provided between each of the input terminals 38a and 38b and the charge integration terminal 50 to directly turn on and off the power from the AC power supply 2.

  The zero cross detection unit 48 is connected between the terminals 38 a and 38 b via the changeover switch 70. In other words, the zero cross detection unit 48 is connected in parallel to the input side of the power supply circuit 46. As a result, when the changeover switch 70 is turned on, the AC power supplied from the power supply source 2 is input to the zero cross detection unit 48.

  The zero cross detection unit 48 monitors the state of the power supplied from the power supply source 2, and inputs the monitoring result to the control unit 44. Specifically, the zero crossing detection unit 48 detects the zero crossing of the AC power supplied from the power supply source 2, and inputs the detection result of the zero crossing to the control unit 44 as a monitoring result.

  The fan motor unit 22 is connected between the terminals 38 a and 38 b via the changeover switch 71. As a result, when the changeover switch 71 is turned on, AC power supplied from the power supply source 2 is input to the fan motor unit 22 and the fan motor unit 22 is driven. That is, when the changeover switch 71 is turned on, the wind blows from the outlets 15 and 16.

  The fin heater 26 is connected between the terminals 38 a and 38 b via the changeover switch 72. As a result, when the changeover switch 72 is turned on, the AC power supplied from the power supply source 2 is input to the fin heater 26, and the fin heater 26 is driven.

  The lighting unit 34 is connected to the output of the power conversion unit 54 via the changeover switch 73. Thereby, by turning on the changeover switch 73, the DC power output from the power conversion unit 54 is supplied to the lighting unit 34, and the lighting unit 34 is lit.

The hand detection unit 40 is connected to the output of the power conversion unit 54 via the changeover switch 74.
Thereby, when the changeover switch 74 is turned on, the DC power output from the power conversion unit 54 is supplied to the hand detection unit 40, and the hand detection unit 40 is driven. That is, when the changeover switch 74 is turned on, the hand detection unit 40 can detect the hand inserted in the hand insertion unit 14. The hand detection unit 40 is connected to the control unit 44, and inputs the detection result (hand detection signal) of the hand inserted in the hand insertion unit 14 to the control unit 44.

  For example, when the changeover switch 74 is turned on, direct current power is supplied to each of the light emitting units 41a to 41c, and detection light is emitted from each of the light emitting units 41a to 41c. The changeover switch 74 has, for example, a switch that can switch on and off for each of the light emitting units 41a to 41c, and individually switches power supply to each of the light emitting units 41a to 41c. When a reverse bias voltage is applied to the photodiode of the light receiving unit 42, the reverse bias voltage is applied to the light receiving unit 42 by turning on the changeover switch 74. Thus, a voltage corresponding to the amount of received detection light is output from the light receiving unit 42 to the control unit 44 as a hand detection signal.

  The changeover switches 70 to 74 are connected to the control unit 44. The on / off of each of the changeover switches 70 to 74 is switched by the control unit 44. The control unit 44 individually controls lighting and extinguishing of the light emitting units 41 a to 41 c by switching on and off of each switch of the changeover switch 74.

  The control unit 44 turns on the changeover switch 71 in response to the detection of the hand by the hand detection unit 40. Thereby, the control unit 44 drives the fan motor unit 22 according to the detection of the hand by the hand detection unit 40, and blows the wind from the blowout ports 15 and 16. In addition, the control unit 44 illuminates the inside of the hand insertion unit 14 by turning on the illumination switch 34 with the changeover switch 73 turned on. Furthermore, when the fin heater 26 is set to ON by the heater on / off switch 61, the control unit 44 turns on the changeover switch 72 to drive the fin heater 26, and the temperature from each outlet 15, 16 is increased. Blow out the wind. Then, the control unit 44 stops the operations of the fan motor unit 22, the fin heater 26, and the illumination unit 34 in response to the release of the hand detection by the hand detection unit 40.

FIG. 5 is a block diagram showing an example of the zero cross detection unit according to the first embodiment.
As shown in FIG. 5, the zero cross detection unit 48 includes a photocoupler 80. The photocoupler 80 includes a pair of light emitting diodes 81 and 82 connected in reverse parallel, and a phototransistor 84 optically coupled to each of the light emitting diodes 81 and 82.

  The anode and the cathode of each of the light emitting diodes 81 and 82 are connected to the power supply source 2 via the changeover switch 70 and each of the terminals 38a and 38b. Therefore, an alternating voltage supplied from the power supply 2 is applied to the anode and the cathode of each light emitting diode 81, 82.

  The collector of the phototransistor 84 is connected to a voltage source via a resistor 86. Thereby, a predetermined DC voltage Vcc is applied to the collector of the phototransistor 84. The voltage source is, for example, the power conversion unit 54. The emitters of the phototransistor 84 are set to a common potential. The emitter of the phototransistor 84 is set to, for example, the ground potential. Then, in the zero cross detection unit 48, the collector of the phototransistor 84 is connected to the control unit 44, and the voltage of the collector of the photo transistor 84 is input to the control unit 44 as a zero cross detection result (zero cross detection signal).

FIG. 6A and FIG. 6B are graphs showing an example of the operation of the zero cross detection unit according to the first embodiment.
FIG. 6A shows an example of the voltage (power supply voltage) of the AC power supplied from the power supply source 2. FIG. 6B shows an example of the zero cross detection signal output from the zero cross detection unit 48 to the control unit 44.

  As shown in FIGS. 6A and 6B, the zero cross detection signal is turned off (for example, 0 V) when the absolute value of the power supply voltage is equal to or greater than a predetermined value, and the absolute value of the power supply voltage is When it is less than the predetermined value, the on state (for example, +5 V) is established.

  When the absolute value of the power supply voltage is equal to or more than a predetermined value, one of the light emitting diodes 81 and 82 is lighted, and the phototransistor 84 is turned on. Therefore, the zero cross detection signal becomes a common potential (off state) according to the potential of the emitter of the phototransistor 84.

On the other hand, when the absolute value of the power supply voltage is less than the predetermined value, that is, near the zero cross, both of the light emitting diodes 81 and 82 are turned off, and the phototransistor 84 is turned off.
Therefore, the DC voltage Vcc appears at the collector of the phototransistor 84, and the zero cross detection signal is turned on according to the DC voltage Vcc.

  As described above, the zero cross detection unit 48 inputs a pulse-shaped signal in which the non-detection state of the zero cross is in the OFF state and the detection state of the zero cross is in the ON state to the control unit 44 as the zero cross detection signal. For example, when 50 Hz AC power is supplied from the power supply 2 to the hand dryer 10, the zero cross detection unit 48 inputs a pulse signal to the control unit 44 every 10 ms (milliseconds) of a half cycle. .

FIG. 7 is a flowchart showing an example of the operation of the hand dryer according to the first embodiment.
FIGS. 8A and 8B are timing charts showing an example of the operation of the hand dryer according to the first embodiment.
FIG. 8A shows an example of the zero cross detection signal.
FIG. 8B illustrates an example of the operation of the function unit 21.
As shown in FIG. 7, FIG. 8A and FIG. 8B, when the control unit 44 starts operation, the zero crossing is detected based on the zero crossing detection signal input from the zero crossing detection unit 48. It is determined whether or not there is (step S101 in FIG. 7). The control unit 44 determines that the zero cross is detected when the zero cross detection signal is in the on state, and determines that the zero cross is not detected when the zero cross detection signal is in the off state.

  When determining that the zero cross is not detected, the control unit 44 determines whether the non-detection time of the zero cross has exceeded the first time t1 (step S102 in FIG. 7). The first time t1 is, for example, about 50 ms to 100 ms. As described above, the zero cross detection signal is repeatedly turned on and off according to the power supply frequency. Therefore, when the zero-crossing detection signal does not turn on for more than a half cycle (for example, 10 ms) of the power supply frequency, it is determined that the zero-crossing detection signal is in a stop state representing stoppage of power supply from the power supply source 2 can do. When the off state of the zero cross detection signal is continued for the first time t1 or more, for example, a state in which an abnormality occurs in the power supply source 2 or a connection state between the connection portion 38 of the power supply line 36 and the connected portion 4 It can be determined that the condition is eliminated.

  If it is determined that the zero cross non-detection time is less than the first time t1, the control unit 44 returns to the operation of step S101 and determines the presence or absence of the zero cross detection. In FIG. 8A, for convenience, the zero cross detection signal when power is appropriately supplied from the power supply source 2 is constant in the ON state, but actually, as shown in FIG. On and off are repeated according to the power supply frequency of the AC power of the power supply 2.

  The control unit 44 operates each unit of the functional unit 21 in the normal operation mode when the zero cross detection signal repeats on and off with an appropriate cycle. In other words, when the control unit 44 determines that the power is appropriately supplied from the power supply source 2, the control unit 44 operates each unit of the functional unit 21 in the normal operation mode.

  In this case, as described above, the control unit 44 operates the fan motor unit 22, the fin heater 26, and the illumination unit 34 according to the detection of the hand by the hand detection unit 40, and the hand by the hand detection unit 40. In response to the release of the detection, the operations of the fan motor unit 22, the fin heater 26, and the illumination unit 34 are stopped. As a result, in the hand dryer 10, in response to the insertion of the hand into the user's hand insertion portion 14, the wind is blown out from the blowout ports 15 and 16 to dry the user's hand.

  On the other hand, when determining that the non-detection time of the zero cross is equal to or longer than the first time t1, the control unit 44 operates at least one of the units of the functional unit 21 as a load (step S103 in FIG. 7). That is, the control unit 44 operates at least one of the units of the functional unit 21 when it is determined that the zero cross detection signal is in the stop state. In this example, the control unit 44 operates at least one of the fan motor unit 22, the fin heater 26, the illumination unit 34, and the hand detection unit 40.

  At this time, the load to be operated may be any one of the fan motor unit 22, the fin heater 26, the illumination unit 34, and the hand detection unit 40, or the fan motor unit 22, the fin heater 26, the illumination unit 34, And each of the hand detection part 40 may be operated. The load to operate may be determined in advance. The load to be operated may be changed by setting with the operation unit or the like. The load of the functional unit 21 to be operated is not limited to the above, and may be any load provided in the hand dryer 10.

  The power supply circuit 46 of the hand dryer 10 is provided with a charge storage element 50 and a power conversion unit 54. Therefore, in the hand dryer 10, for example, after the connection state of the connection portion 38 and the connected portion 4 is released, the residual charge accumulated in the charge storage element 50 of the power supply circuit 46, the power conversion portion 54, etc. , And may appear on the terminals 38a and 38b of the connection portion 38. At this time, if the user grips the connection portion 38, it may cause an electric shock accident.

  Therefore, the control unit 44 operates at least one of the units of the functional unit 21 when the zero cross detection signal is in the stop state representing the stop of the power supply from the power supply source 2 and stores the power supply circuit 46. The remaining charge is discharged to the functional unit 21.

  The control unit 44 discharges so that the voltage of each of the terminals 38 a and 38 b of the connection unit 38 becomes equal to or less than a predetermined voltage within a predetermined time. The control unit 44 discharges, for example, such that the voltage of each of the terminals 38 a and 38 b of the connection unit 38 becomes 45 V or less within one second. At this time, the control unit 44 can operate for several seconds even after the power supply from the power supply source 2 is cut off due to residual charge of the power supply circuit 46 or the like. That is, the control unit 44 monitors the power supply, and when it is determined that an abnormality occurs in the power supply, controls the operation of the functional unit 21 within the operable range of itself, and the residual accumulated in the power supply circuit 46 The charge is discharged stably.

  Thereby, even when the connection state between the connection portion 38 and the non-connection portion 4 is unexpectedly released during the operation of the hand dryer 10, the occurrence of an electric shock accident can be suppressed. The safety of the hand dryer 10 can be enhanced. In the hand dryer 10, the residual charge accumulated in the power supply circuit 46 is discharged to the functional unit 21. Therefore, it is not necessary to separately provide a discharge resistor or the like, and the residual charge can be discharged with a simple configuration. For example, the safety can be enhanced without increasing the manufacturing cost of the hand dryer 10. For example, when discharging using the hand detection unit 40, the discharge can be performed quietly. On the other hand, when discharging using the fan motor unit 22, since the impedance is low, discharge can be performed instantaneously. Furthermore, when discharging using the fin heater 26, the discharge can be performed quietly and instantaneously.

Second Embodiment
FIG. 9 is a flowchart showing an example of the operation of the hand dryer according to the second embodiment.
FIG. 10A to FIG. 10D are timing charts illustrating an example of the operation of the hand dryer according to the second embodiment.
The same reference numerals are given to components substantially the same in function and configuration as the first embodiment, and the detailed description will be omitted.

  As shown in FIGS. 9 and 10A to 10D, in this example, when the control unit 44 determines that the non-detection time of the zero cross is equal to or longer than the first time t1, The operation of the functional unit 21 is stopped. Steps S201 and S202 in FIG. 9 are substantially the same as steps S101 and S102 described with reference to FIG.

For example, the control unit 44 stops the operation of the fin heater 26 (Step S203 in FIG. 9), and stops the operation of the fan motor unit 22 (Step S204 in FIG. 9). Further, for example, when the non-detection time of the zero cross is the first time t1 or more, the control unit 44 stops the operation of the illumination unit 34 and the hand detection unit 40. Therefore, as shown in FIG. 10D, in the state where the functional unit 21 is operating, when it is determined that the first time t1 or more, the operation of the functional unit 21 is stopped.

  After stopping the operation of the functional unit 21, the control unit 44 determines whether the non-detection time of the zero cross has exceeded the second time t2 (step S205 in FIG. 9). The second time t2 is longer than the first time t1. The second time t2 is, for example, about 100 ms to 300 ms.

  If it is determined that the zero cross non-detection time is less than the second time t2, the control unit 44 returns to the operation of step S201 and determines the presence or absence of the zero cross detection. On the other hand, when determining that the non-detection time of the zero cross is equal to or longer than the second time t2, the control unit 44 operates at least one of the units of the functional unit 21 as a load (step S206 in FIG. 9).

  As described above, in this example, after determining that the non-detection time of the zero cross is the first time t1 or more, the control unit 44 determines whether the non-detection time of the zero cross is the second time t2 or more. It is determined that the residual charge is discharged to the functional unit 21 if it is the second time t2 or more. That is, after determining that the zero cross detection signal is in the stop state, the control unit 44 discharges the residual charge to the functional unit 21 when the stop state is continued for a predetermined time. In other words, the control unit 44 determines the stop state of the zero cross detection signal when the stop state is continued for a predetermined time from the time when it is determined that the zero cross detection signal is in the stop state.

  As described above, when the stop state of the zero cross detection signal is continued for a predetermined time, the residual charge to the functional unit 21 is discharged. Thereby, for example, it is possible to suppress discharge from being performed due to a temporary voltage loss due to an instantaneous power failure of the power supply source 2 or the like. For example, increase in power consumption of the hand dryer 10 due to useless discharge can be suppressed.

Third Embodiment
FIG. 11 is a block diagram showing the electrical configuration of the hand dryer according to the third embodiment.
As shown in FIG. 11, the hand dryer 100 further includes an input unit 64. The input unit 64 is connected to the control unit 44. The input unit 64 inputs, for example, various instructions corresponding to the operation of the user or the like to the control unit 44. The input unit 64 is, for example, an operation member such as a button or a lever. The input unit 64 may be, for example, an interface circuit that inputs an instruction (signal) input from an external device to the control unit 44.

  The input unit 64 can instruct the control unit 44, for example, the load of the functional unit 21 that discharges the residual charge of the power supply circuit 46. The control unit 44 discharges the residual charge of the power supply circuit 46 to the load instructed by the input unit 64 when the zero cross detection signal is stopped.

12 (a) to 12 (f) are timing charts showing an example of the operation of the hand dryer according to the third embodiment.
As shown in FIGS. 12 (a) to 12 (f), the control unit 44 of the hand dryer 100 determines the time until the discharge of the residual charge is started from the determination of the stop state of the zero cross detection signal. In accordance with the load of the functional unit 21 that discharges the The control unit 44 changes, for example, the time from the determination of the stop state of the zero cross detection signal to the start of the discharge of the residual charge in accordance with the instruction from the input unit 64. Hereinafter, the time from the determination of the stop state of the zero cross detection signal to the start of discharge of the residual charge will be referred to as “delay time”.

  For example, when the fin heater 26 is set to a load of discharge, the control unit 44 sets the delay time to the second time t2. For example, when the fan motor unit 22 is set to a discharge load, the control unit 44 sets the delay time to the third time t3. For example, when the hand detection unit 40 is set to a discharge load, the control unit 44 sets the delay time to the fourth time t4.

The third time t3 is shorter than the second time t2. The fourth time t4 is even shorter than the third time t3. The delay time is set, for example, in accordance with the time required to discharge the residual charge (hereinafter, referred to as “discharge time”). For example, when the fin heater 26 is loaded, the time required for discharging the residual charge is shorter than the time required for discharging the residual charge when the fan motor unit 22 is loaded. Therefore, the third time t3 is shorter than the second time t2. For example, when the fan motor unit 22 is used as a load, the time required to discharge the residual charge is shorter than the time required to discharge the residual charge when the hand detection unit 40 is used as a load. Therefore, the fourth time t4 is shorter than the third time t3.

  The delay time is set, for example, such that the sum of the delay time and the discharge time falls within a predetermined time. For example, the delay time is set such that the sum of the delay time and the discharge time is 0.8 seconds or more and 0.95 seconds or less.

Thus, the delay time can be made longer as the load with a shorter discharge time. For example, the discharge time of the fin heater 26 is often shorter than the discharge time of the hand detection unit 40. Therefore, when the fin heater 26 is set as a load, the delay time can be made longer than when the hand detection unit 40 is set as a load. For example, wasteful discharge due to instantaneous power failure can be further suppressed. In addition, when the fan motor unit 22 is set to a load, there is a concern that the wind blows out at the time of discharge to give a sense of discomfort to the user. When the fin heater 26 is set to a load, for example, the delay time can be extended without giving a sense of discomfort to the user, and wasteful discharge due to an instantaneous power failure or the like can be suppressed.

  As described above, by changing the time from when the zero-crossing detection result is stopped to when the discharge is actually performed according to the load, for example, it is appropriate within a specific time while suppressing unnecessary discharge. Discharge can be completed.

Fourth Embodiment
FIG. 13 is a flowchart showing an example of the operation of the hand dryer according to the fourth embodiment.
As shown in FIG. 13, in this example, the control unit 44 stores the operation state of the functional unit 21 when it determines that the non-detection time of the zero crossing is longer than or equal to the first time t1 (FIG. 13). Step S303). The control unit 44 stores the operation state of the functional unit 21 in a storage unit such as the EEPROM 60, for example. Steps S301 and S302 in FIG. 13 are substantially the same as steps S101 and S102 described with reference to FIG.

  After storing the operation state of the functional unit 21, the control unit 44 stops the operation of the functional unit 21 (steps S304 and S305 in FIG. 13). After stopping the operation of the functional unit 21, the control unit 44 determines whether the non-detection time of the zero cross has exceeded the second time t2 (step S306 in FIG. 13).

  The control unit 44 operates at least one of the units of the functional unit 21 as a load when it determines that the non-detection time of the zero cross is the second time t 2 or more (step S 307 in FIG. 13).

  If it is determined that the zero cross non-detection time is less than the second time t2, the control unit 44 returns to the operation of step S301 and determines the presence or absence of the zero cross detection. At this time, the control unit 44 determines whether or not the process is after the stop state determination (step S308 in FIG. 13). The determination of the stop state is determined between step S302 and step S303.

  If the control unit 44 determines that the processing is performed after the determination of the stop state, whether the function unit 21 was operated before the determination of the stop state based on the information on the operation state of the function unit 21 stored in the EEPROM 60 or the like It is determined whether or not it is (step S309 in FIG. 13).

  Then, when it is determined that the functional unit 21 is operating, the control unit 44 operates the functional unit 21 by the stored operation (step S310 in FIG. 13).

  As described above, the control unit 44 stops the operation of the functional unit 21 and stores the state of the operation of the functional unit 21 when the zero cross detection signal is stopped while the functional unit 21 is operating. If the stopped state is canceled within a predetermined delay time, the operation of the stored functional unit 21 is resumed.

  As described above, when the stop state is determined while the functional unit 21 is operating, the operation of the functional unit 21 is stopped, for example, to suppress an unexpected operation stop due to the loss of the power, The safety of the drying device can be enhanced.

  In addition, the state of the operation of the functional unit 21 is stored when it is in the stopped state, and the operation of the stored functional unit 21 is resumed when the stopped state is canceled within the delay time. Thereby, for example, even when the operation is temporarily stopped due to a momentary power failure or the like, the waiting time of the user until the operation is resumed can be shortened, and the deterioration of the usability of the hand dryer can be suppressed. it can.

Fifth Embodiment
FIG. 14 is a block diagram showing the electrical configuration of the hand dryer according to the fifth embodiment.
As shown in FIG. 14, in the hand dryer 110, the number history information 65 is stored in the EEPROM 60. The EEPROM 60 stores, as number history information 65, the number of times the zero cross detection signal has been stopped. The number-of-times history information 65 stores, for example, information on the number of times of a stop state and information on date and time. The storage unit for storing the number history information 65 is not limited to the EEOROM 60, and may be, for example, a flash memory or any non-volatile memory capable of writing and reading information.

  The control unit 44 adds the number of times of the count history information 65 stored in the EEPROM 60 when the zero cross detection signal is in the stop state. Then, the control unit 44 displays the number of times stored in the number history information 65 of the EEPROM 60 using the lighting unit 34, for example, in accordance with a predetermined operation input from the input unit 64 or the like.

  The illumination unit 34 displays the number of times of the number history information 65 by, for example, emitting or flashing in a predetermined pattern according to the number of times of the number history information 65. The illumination unit 34 displays the number of times of the count history information 65 by optical communication by light emission or blinking, for example.

  In this example, the illumination unit 34 is used as a display unit for displaying the number of times. The display unit is not limited to this, and may be a known display or the like that displays the number of times using characters or symbols, or a speaker that displays the number of times using voice. The display unit may be any member capable of displaying the number of times. However, by using the illumination unit 34 for the display unit, for example, the number of parts of the hand dryer 110 can be reduced. Moreover, the fall of the designability of the hand dryer 110 can also be suppressed.

  As described above, when the zero cross detection signal is stopped, the hand dryer 110 adds the number of times of the history information 65 stored in the EEPROM 60, and displays the number of times stored according to the predetermined operation. . Thereby, for example, an abnormality of the power supply source 2 can be grasped. For example, the status of the operation of the hand dryer 110 can be diagnosed. It is possible to easily take measures against the abnormality of the power supply source 2 and the like. Further, the information to be stored may be not only the number of times of occurrence of the stop state but also any number or all of the number of times of determination of the stop state or the number of operation of the functional unit.

Sixth Embodiment
FIG. 15 is a flowchart showing an example of the operation of the hand dryer according to the sixth embodiment.
As shown in FIG. 15, in this example, the control unit 44 has a discharge mode and a non-discharge mode. The discharge mode is a mode in which the residual charge of the power supply circuit 46 is discharged when the zero cross detection signal is stopped. The non-discharge mode is a mode in which the residual charge of the power supply circuit 46 is not discharged even when the zero cross detection signal is stopped.

  The control unit 44 selectively switches between the discharge mode and the non-discharge mode. The control unit 44 selectively switches between the discharge mode and the non-discharge mode according to, for example, a mode switching signal input via the input unit 64. Further, the control unit 44 stores, for example, settings of the discharge mode and the non-discharge mode in a storage unit such as the EEPROM 60. In addition, the control unit 44 displays the setting of the discharge mode and the non-discharge mode on the display unit such as the illumination unit 34 according to a predetermined operation from the input unit 64, for example.

  As shown in FIG. 15, the control unit 44 refers to the setting information of each mode stored in the EEPROM 60, for example, at the start of operation after power on, and determines whether the discharge mode is set or not. It determines (step S401 of FIG. 15).

  If it is determined that the discharge mode is set, the control unit 44 subsequently executes the operation in the discharge mode (step S402 in FIG. 15). In the discharge mode, the control unit 44 executes, for example, any operation of each of the above-described embodiments.

  On the other hand, when it is determined that the non-discharge mode is set, the control unit 44 subsequently executes the operation in the non-discharge mode (step S403 in FIG. 15). In the non-discharge mode, the control unit 44 does not discharge the residual charge of the power supply circuit 46 even when the zero cross detection signal is stopped.

  For example, when the power supply line 36 is directly connected to a switchboard or the like, the controller 44 is set to the non-discharge mode when it is not necessary to perform the discharge. Thereby, it is possible to suppress, for example, useless discharge accompanying an instantaneous power failure or the like. For example, an increase in power consumption due to useless discharge can be further suppressed. The usability of the hand dryer can be further improved.

  Also, by displaying the setting of the discharge mode and the non-discharge mode on the illumination unit 34 or the like according to a predetermined operation, for example, the user is made to understand the setting of the discharge mode and the non-discharge mode, and the appropriate mode is set. It can be done. Erroneous setting of the discharge mode and the non-discharge mode can be suppressed.

  In the above embodiments, the zero cross detection unit 48 is shown as a power supply monitoring unit that monitors the state of the power supplied from the power supply source 2 and inputs the monitoring result to the control unit 44. The power supply monitoring unit is not limited to the zero cross detection unit 48, and may be, for example, a voltage detector that monitors the voltage of the power supply 2 or a current detector that monitors the current of the power supply 2.

  For example, when a voltage detector is used as a power supply monitoring unit, the detected voltage value is input to the control unit 44 as a monitoring result. In this case, for example, when the effective value (absolute value) or the maximum value of the voltage value becomes equal to or less than a predetermined value, the control unit 44 determines that the monitoring result is in the stop state representing stop of the power supply The residual charge accumulated in the circuit 46 is discharged to the functional unit 21.

  For example, when the current detector is used as a power supply monitoring unit, the detected current value is input to the control unit 44 as a monitoring result. In this case, for example, when the effective value (absolute value) or the maximum value of the current value becomes equal to or less than a predetermined value, the control unit 44 determines that the monitoring result is in the stop state representing stop of the power supply The residual charge accumulated in the circuit 46 is discharged to the functional unit 21.

  Thus, the power supply monitoring unit may be any member that can monitor the state of the power supplied from the power supply source 2 and input the monitoring result to the control unit 44 without being limited to the zero cross detection unit 48. .

The embodiments of the present invention have been described above. However, the present invention is not limited to these descriptions. Those skilled in the art can appropriately modify the above-described embodiment as long as they have the features of the present invention and fall within the scope of the present invention. For example, the shape, size, material, arrangement, and the like of each element provided in the hand dryer 10, 100, 110, etc. are not limited to those illustrated, and can be appropriately changed.
Moreover, each element with which each embodiment mentioned above is equipped can be combined as much as technically possible, and what combined these is also included in the scope of the present invention as long as the feature of the present invention is included.

  DESCRIPTION OF SYMBOLS 2 power supply source, 4 connected part, 10, 100, 110 hand dryer, 12 main body part, 14 hand insertion part, 15, 16 outlet, 18 vent, 20 water receiving tray, 21 function part, 22 fan motor Unit, 23, 24 air duct, 26 fin heater, 28 filter, 30 air intake duct, 32 sound absorbing material, 34 illumination part, 36 power supply line, 38 connection part, 40 hand detection part, 41 light emission part, 42 light reception part, 44 control , 46 power circuits, 48 zero cross detectors, 50 charge storage elements, 52 rectifiers, 54 power converters, 60 EEPROMs, 61 heater on / off switches, 62 air flow switches, 63 power switches, 64 inputs, 65 times history Information, 70-74 changeover switch, 80 photo couplers, 81, 82 light emitting die Over de, 84 photo-transistor, 86 resistance

Claims (9)

A hand insertion portion into which the user's hand can be inserted;
An outlet for blowing a wind into the hand insertion portion;
A functional unit including: a hand detection unit that detects a hand inserted into the hand insertion unit; and a gas supply unit that supplies gas to the blowout port and blows off the wind from the blowout port;
A control unit that operates the gas supply unit according to the detection of the hand by the hand detection unit, and stops the operation of the gas supply unit according to the release of the detection of the hand by the hand detection unit;
The power supply source is connected to the power supply source via a power supply line having a connection portion detachably connected to the connection portion of the power supply source, and the power supplied from the power supply source is converted to the power corresponding to the control unit A power supply circuit that supplies the converted power to the control unit;
A power supply monitoring unit that monitors the state of power supplied from the power supply source and inputs the monitoring result to the control unit;
Equipped with
The control unit discharges the residual charge accumulated in the power supply circuit to the functional unit when the monitoring result is in a stop state indicating stop of power supply.
The control unit performs the discharge of the residual charge also in the discharge mode in which the residual charge is discharged when the monitoring result is in the stopped state, and also when the monitoring result is in the stopped state. And a non-discharge mode, wherein the discharge mode and the non-discharge mode can be selectively set.   The control unit operates at least one of the hand detection unit and the gas supply unit when the monitoring result is in the stop state, and causes the at least one of the hand detection unit and the gas supply unit to be operated. The hand dryer according to claim 1, wherein the residual charge is discharged. The functional unit further includes a heating unit that heats the gas supplied from the gas supply unit,
The hand drying apparatus according to claim 1, wherein the control unit operates the heating unit to discharge the residual charge to the heating unit when the monitoring result is in the stop state.   The hand drying apparatus according to any one of claims 1 to 3, wherein the control unit discharges the residual charge to the functional unit when the stop state is continued for a predetermined time. .   5. The hand drying apparatus according to claim 4, wherein the control unit changes the predetermined time according to a load of the functional unit that discharges the residual charge.   The control unit stops the operation of the functional unit and stores the state of the operation of the functional unit when the monitoring result is in the stop state while the functional unit is operating. 5. The hand dryer according to claim 4, wherein the operation of the stored functional unit is resumed when the stopped state is canceled within a predetermined time. A storage unit that stores the number of times the monitoring result is in the stopped state;
A display unit capable of displaying the number of times;
And further
The control unit adds the number stored in the storage unit when the monitoring result is in the stop state, and the display unit stores the number stored in the storage unit according to a predetermined operation. The hand dryer according to any one of claims 1 to 6, characterized in that:   The hand dryer according to claim 1, further comprising a display unit capable of displaying the setting of the discharge mode and the non-discharge mode of the control unit. The power supplied from the power supply source is AC power,
The power supply monitoring unit detects a zero crossing of the AC power, and inputs the detection result of the zero crossing to the control unit as the monitoring result.
The hand drying apparatus according to any one of claims 1 to 8, wherein the control unit determines that the stopped state is detected when the zero crossing is not detected for a predetermined period.

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