JP3791536B1 - Hand dryer - Google Patents

Abstract

A conventional hand drying apparatus for drying both sides of a hand has a fan motor that draws in air heated by a warm air heater and blows warm air at the same temperature on the palm and back of the hand. The side might be under-dried.
Fan motors 14 and 24 for sending out air and blowing nozzles 17 and 27 for blowing out air disposed above the fan motors 14 and 24 are connected by air supply passages 16 and 26, respectively. In the drying apparatus 10, warm air heaters 19 and 29 are disposed in the air supply passages 16 and 26, respectively, so that the warm air temperature on the palm side is equal to or higher than the back side of the hand.
[Selection]
FIG.

Description

  The present invention relates to a hand dryer.

  Conventionally, as a typical example of a hand-drying device that dries a hand by blowing an air flow on the hand in order to dry a wet hand without using a handkerchief or a paper towel, for example, described in Patent Document 1 Known types. In such a hand drying device, when a hand is inserted into an opening recess formed in the upper portion thereof, the hand in which the sensor is inserted is detected and the built-in fan motor is operated. And it is comprised so that the air which the fan motor sent may be blown out from the palm side blowing nozzle and the back side blowing nozzle which were provided in the wall of the opening recessed part to the palm and back of the inserted hand.

Moreover, in patent document 1, it is set as the structure which can connect an external heater to the air inlet of a hand dryer, and it can blow off as a warm air from a blowing nozzle by supplying the air heated with the external heater to a fan motor. it can. As a result, the coldness of the wind can be reduced, and the hands wet by the heat of warm air can be dried more quickly.
JP 2003-169759 A

  However, in the conventional hand dryer, since the heater is provided on the suction side of the fan motor, the temperature of the hot air blown out is always the same between the palm and the back. Since the back of the hand is more sensitive to the heat of the wind than the palm, the warm air temperature on the back side of the hand cannot be very high, but the warm air temperature on the palm side is also lowered to match the back of the hand, so compared to the back of the hand There was a problem that palms with many irregularities were difficult to dry. Further, since the air heated by the external heater is supplied to the fan motor, there is a problem that air that has been warmed and has a low specific gravity flows into the fan motor, and fan blowing efficiency decreases.

  The present invention has been made to solve the above-described problems of the prior art, and an object of the present invention is to provide a hand-drying device that can efficiently blow hot air and obtain high drying performance.

In order to solve the above problem, in the present invention described in claim 1, a hand drying chamber into which a user's hand is inserted, an instep side blowing nozzle that blows wind toward the back of the user's hand, and wind in the user's palm. A hand-drying device that blows air from the blow nozzles on both sides of the back of the user's hand and the palm, and heats the air blown to the back-side blow nozzle. The former side warm air heater and the palm side warm air heater that heats the air blown to the palm side blowing nozzle are provided, and the energization amount to the palm side warm air heater is made larger than the energization amount to the instep side warm air heater. By increasing the temperature, the temperature of the hot air blown out to the palm was made higher than the temperature of the hot air blown out to the back of the hand. Hot air is blown out so that the hot air temperature on the instep side where it is easy to feel heat does not become too high, and the palm side with large irregularities that is difficult to dry promotes drying by blowing out with slightly higher hot air temperature. I can do it.

  In this invention of Claim 2, the upper side fan motor which ventilates to the said upper side blowing nozzle, the palm side fan motor which ventilates to the said palm side blowing nozzle, and air blows from each said fan motor to each said blowing nozzle The upper side fan motor and the palm side fan motor are each covered with a fan motor cover communicating with each of the air supply paths, and each of the fan motor covers is an abbreviation for housing each fan motor. From a circular container-like cover part, and a cover air passage part protruding from a part of the circumferential surface of the cover part with a width smaller than the diameter of the circular surface of the cover part and connected to each air supply path The warm air heater was housed in the cover air passage section. With this configuration, the hot air heater is disposed in a small air passage cross-sectional area in the air supply path from the fan motor to the nozzle, and even when a compact hot air heater is used. The contact efficiency can be increased. The warm air heater is located on the exhaust side of the fan motor closest to the fan motor, and the air supply path from the hot air heater to the nozzle can be configured so that the cross-sectional area gradually increases, and the pressure of the air supply section Since the loss can be reduced, the air blowing efficiency can be increased. In addition, according to this structure, two fan motors can be arrange | positioned with volume efficiency, and a compact hand-drying apparatus can be provided.

Further, in the present invention according to claim 3, the hot air heater is connected to a heat exchanging portion that performs heat transfer in contact with the wind blown from the fan motor, and an electric wire that supplies electric power to the hot air heater. The terminal portion includes a heater terminal projecting in the longitudinal direction of the heat exchange portion, and a conductor terminal having a conductor for energizing the hot air heater, and the heater The terminal and the conducting wire terminal were connected so as to intersect at a substantially right angle, and the conducting wire terminal was connected in parallel with the ventilation direction . As the connecting portion becomes compact and the passage of wind that is not heated is reduced, the efficiency of contact with the air flow is increased in the entire warm air heater. Since the efficiency increase can further reduce the heat exchange section, a more compact hand dryer can be configured.

  In this invention of Claim 4, it has the convection part which the air warmed by the said warm air heater can naturally convect between each said blowing nozzle of the said warm air heater, and before the operation | movement of the said fan motor The air in the convection section is heated by energizing the warm air heater. By operating in this manner, the warming of the wind blown from the blowout nozzle can be accelerated, so that the drying effect can be further enhanced.

  According to the hand drying apparatus of the present invention, warm air suitable for hand drying can be efficiently blown out, and the drying effect can be further enhanced even with a compact configuration.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, an embodiment of the invention will be described with reference to the accompanying drawings.

  FIG. 1 is a perspective view showing a usage state of a hand dryer 10 according to the present invention. The hand drying device 10 has a substantially rectangular parallelepiped shape, and has an opening at the top. The hand drying device 10 is installed exclusively on a wall 1 such as a public washroom, and dries the wet hands 2 by hand washing or the like. It is used for this purpose.

  When the hand 2 is dried, the hand 2 is inserted into the opening recess 31 opened at the top of the hand drying device 10. The sensor 32 that detects insertion of the hand 2 sends a detection signal to a control unit (not shown), and the control unit starts energizing a fan motor (not shown) and a warm air heater (not shown). . The hand drying device 10 sucks air from the bottom by the operation of the fan motor, heats it with a warm air heater built in the hand drying device 10, and faces the hand 2 inserted into the opening recess 31 to the palm side blowing nozzle 17. And heated air is blown from the upper side blowing nozzle 27. Since water droplets are blown off from the hand 2 and the evaporation of water is promoted, the warmed hand 2 can be dried without using a handkerchief or a towel. In addition, the thick arrow shown in the bottom part vicinity of the hand dryer 10 of FIG. 1 has shown the flow of the air inhaled.

  FIG. 2 is a perspective view showing the entire appearance of the hand dryer 10 according to the embodiment of the present invention. The hand-drying device 10 of the present embodiment includes a box 30 having a palm-side fan motor 14 and a fan-side fan motor 24 for blowing air and a control unit (not shown), the outer shape of which is a substantially rectangular shape, A left side panel 33 that can be detachably attached to the left side surface of the box 30, a right side panel 34 that can be detachably attached to the right side of the box 30, and air provided at the bottom of the box 30 And the intake filter 39 that can be attached to the portion of the intake port 11, and a drainage tray 38 that can be detachably attached to the bottom of the box 30.

  The box 30 includes a housing 51 having a front opening and a plate-shaped surface cover 50 that closes the front opening of the housing 51. A housing portion for accommodating the palm side fan motor 14 and the back side fan motor 24 is provided on the lower side of the housing 51, and the palm side fan motor 14 and the back side fan motor are respectively connected to the palm side fan motor cover 54 and the back side fan motor. Covered with a cover 55. Above the palm side fan motor cover 54 and the back side fan motor cover 55, a palm side air supply path 16 and a back side air supply path 26 through which air sent out by the palm side fan motor 14 and the back side fan motor 24 pass, respectively. Projecting toward the upper side of the palm side fan motor 14 and the upper side fan motor 24.

  The portions near the fan motor of the palm side air supply path 16 and the back side air supply path 26 are formed integrally with the palm side fan motor cover 54 and the back side fan motor cover 55, respectively. That is, the palm-side fan motor cover 54 is configured by a substantially circular container-shaped palm-side cover portion 74 that covers the palm-side fan motor 14 and a palm-side cover airflow passage portion 84 that constitutes a part of the palm-side air supply path 16. Has been. The palm-side cover airflow passage portion 84 is provided so as to protrude from the circumferential side surface of the palm-side cover portion 74 and to have a width smaller than the diameter of the circular portion of the palm-side cover portion 74. Similarly, the instep side fan motor cover 55 has an instep side cover portion 75 and an instep side cover air blowing passage portion 85. In addition, as shown in FIG. 3, two fan motors can be stored compactly in the hand dryer 10 by arranging the palm side cover portion 74 and the instep side cover airflow passage portion 85 adjacent to each other. Narrow hand dryer 10 can be provided.

  Further, a plurality of small hole-like palm-side blowing nozzles 17 and upper-side blowing nozzles 27 are provided on the upper side of the palm-side air supply passage 16 and the upper-side air supply passage 26 at the inlet portion of the opening recess 31. The inner side is arranged in a line in the left-right direction, and the air that has passed through the palm-side air supply passage 16 and the instep-side air supply passage 26 is blown out toward the inside of the opening recess 31.

  In FIG. 3, a palm-side warm air heater 19 having an area slightly smaller than the cross-section of the flow path is provided in the palm-side air supply path 16 in the vicinity of the palm-side fan motor 14, that is, in the palm-side cover air passage section 84. The air sent out by the palm-side fan motor 14 is brought into contact with the palm-side warm air heater 19 so that the air can be heated. At the same time, similarly to the palm side, the upper side warm air having an area slightly smaller than the cross section of the flow path is also provided inside the upper side air supply path 26 in the vicinity of the upper side fan motor 24, that is, the upper side cover air passage 85. A heater 29 is provided, and the air sent out by the upper fan motor 24 is brought into contact with the upper hot air heater 29 so that the air can be heated.

  As shown in FIG. 4, the palm-side warm air heater 19 has a substantially rectangular parallelepiped shape that closes most of the cross-section of the palm-side air supply passage 16 in the vicinity of the palm-side fan motor 14, and exchanges heat with air. A heat exchanging part 61 for conducting the electric power and a terminal part 62 for energizing the palm-side hot air heater 19. The white arrow shown in FIG. 4 indicates the flow direction of the air sent out from the palm side fan motor 14, that is, the ventilation direction. The heat exchange unit 61 has air permeability and heats the air. The plurality of fins 60 are provided along the direction in which air flows. The terminal portion 62 connects a heater terminal 63 projecting in the longitudinal direction of the heat exchanging portion 61 and a lead wire terminal 64 having a lead wire for energizing the hot air heater. The heater terminal 63 and the conductive wire terminal 64 are connected so as to intersect at a substantially right angle, and the conductive wire terminal 64 is connected in parallel with the ventilation direction of the palm-side air supply path 16. Here, the ventilation direction is the direction in which the wind flows inside the palm-side air supply path 16, and in the palm-side air supply path 16, the palm-side fan motor 14 heads toward the palm-side blow nozzle 17. The direction.

  The instep side warm air heater 29 is also configured in the same manner as the palm side warm air heater 19 with respect to the instep side air supply path 26.

  In FIG. 2, 32 is one of the sensors provided for detecting the insertion of the hand 2 into the opening recess 31, and the left side panel 33 and the right side panel 34 are open recesses. It is the cover which obstruct | occludes the left-right side of 31 each.

  The intake filter 39 is provided to remove dust and dirt in the air sucked from the intake port 11 by being installed at the intake port 11, and the mesh structure of the intake filter 39 can collect dust and dust. It is possible to inhale clean air.

  The drainage tray 38 is constituted by a tray having an upper opening. In the present embodiment, a water storage space is formed to receive water flowing from the opening recess 31 through the drainage channels provided on the left and right side surfaces of the housing 51.

  In the above configuration, the gist of the present invention will be described with reference to FIGS. 3 is a front view of the hand dryer 10 with the front cover 50 removed, FIG. 4 is an enlarged view of the warm air heater in the air passage, and FIG. 5 is a hand dryer 10 in the present embodiment shown in FIG. FIG. 6 is a BB longitudinal sectional view of the hand dryer 10 in the present embodiment shown in FIG. Further, the flow of air blown from the palm side blowing nozzle 17 is indicated by an arrow as a palm side flow path 40, and the flow of air blown from the back side blowing nozzle 27 is indicated by an arrow as a back side flow path 41.

  First, the air sucked from the air inlet 11 flows in the air intake passage 12 that guides the air to the air inlet of the fan motor, and the palm side fan motor inlet 13 and the upper side fan motor which are air inlets of the fan motor. Branches to the suction port 23.

  In the palm-side flow path 40 which is one of the branches, the air reaching the palm-side fan motor suction port 13 is discharged by a fan (not shown) rotating inside the palm-side fan motor 14. It is sent to the outlet 15 and flows into the palm-side air supply passage 16 connected to the palm-side fan motor discharge port 15 (FIG. 5).

  Here, the palm-side air supply passage 16 in the vicinity of the palm-side fan motor 14 is provided with a palm-side warm air heater 19 slightly smaller than the cross-sectional area of the palm-side air supply passage 16.

  That is, air is not heated on the inlet side of the palm side fan motor 14 but air is heated near the outlet side of the palm side fan motor 14.

  Therefore, the palm-side fan motor 14 does not inhale the air heated by the palm-side warm air heater 19, thereby eliminating the load caused by the air heated by the palm-side fan motor 14 passing through the fan motor. can do. In addition, a decrease in fan blowing efficiency due to a decrease in the density of heated air is also eliminated.

  By the way, since the density per predetermined volume becomes small by heating air, it is known that the heated air will rise in the air before a heating.

  Therefore, since the palm-side warm air heater 19 is disposed above the palm-side fan motor 14, the energization of the palm-side fan motor 14 and the palm-side warm air heater 19 is stopped, and ventilation is performed. Even if the palm-side warm air heater 19 has residual heat in the absence, the air heated by the residual heat rises from the palm-side warm air heater 19. Therefore, since the heated air does not move to the palm-side fan motor 14 located below the palm-side warm air heater 19, the palm-side fan motor 14 is prevented from being damaged by the heat accumulated in the air. be able to.

  Further, a palm-side warm air heater 19 is provided in the palm-side air supply path 16 formed in a part of the palm-side fan motor cover 54 that covers the palm-side fan motor 14.

  Therefore, since the palm side fan motor cover 54 and the palm side warm air heater 19 are integrated, the palm side fan motor 14 and the palm side warm air heater 19 can be disassembled and assembled at the same time.

  Moreover, since the palm side fan motor cover 54 is formed of a heat resistant material, it is not necessary to provide a heat resistant member for each of the palm side hot air heater 19 and the palm side fan motor 14 that generate heat, and one member is used. Deformation due to heat can be prevented.

  In addition, the air heated by passing through the hot air heater includes air that has passed while contacting the heat exchange section of the hot air heater and air that has passed without contacting the heat exchange section. Is in a state where the air temperature varies.

  Therefore, by providing the palm-side warm air heater 19 in the vicinity of the palm-side fan motor outlet 15, the time for mixing the air until the heated air reaches the palm-side blow nozzle 17 from the palm-side warm air heater 19 is increased. The air can be made longer and the air at a uniform temperature can be blown out from the palm side blowing nozzle 17.

  The palm-side air supply path 16 is enlarged from the palm-side fan motor discharge port 15 toward the palm-side outlet nozzle 17.

  Accordingly, the air flowing from the palm side fan motor discharge port 15 to the palm side enormous portion 18 flows in a direction in which the cross-sectional area of the flow path becomes larger, so that the resistance when the air flows through the palm side air supply path 16 is reduced. Thus, the load on the palm-side fan motor 14 can be reduced.

  Further, for example, one second before the palm-side fan motor 14 is operated, the palm-side warm air heater 19 is energized, and the palm-side warm air heater 19 is controlled to be heated before air flows. By heating the palm-side warm air heater 19 in advance in this way, the temperature of the air passing through the palm-side warm air heater 19 can be quickly raised, and the hand can be dried in a short time. . Moreover, the temperature of the wind which blows off from the palm side blowing nozzle 17 can be raised more rapidly because the air in the palm side huge part 18 is warmed by natural convection. In this case, the palm side enormous part 18 functions as a convection part that performs natural convection.

  Further, for example, after the user of the hand drying apparatus 10 finishes drying the hand, the air stored in the palm side enormous portion 18 before the next user performs the hand drying. It is assumed that the temperature decreases due to heat dissipation.

  Even in such a case, the temperature of the air stored in the palm-side massive portion 18 is less than or equal to a predetermined temperature by providing the palm-side massive portion 18 with a means for detecting the temperature (for example, a temperature sensor). The control unit that has received the indicated signal is configured to energize the palm-side warm air heater 19. Thereby, the heated air in the vicinity of the palm-side warm air heater 19 rises by natural convection, and air having a predetermined temperature or higher can always be stored in the palm-side enormous portion 18, so that the next user can radiate heat. Therefore, it is possible to prevent discomfort caused by cooling the hand without blowing cold air onto the wet hand.

  The terminal portion 62 of the palm-side hot air heater 19 is connected to a heater terminal 63 protruding in the longitudinal direction of the heat exchanging portion 61 and a conductive wire terminal 64 having a conductive wire for energizing the warm air heater. Yes.

  The heater terminal 63 and the conductive wire terminal 64 are connected so as to intersect at a substantially right angle, and the conductive wire terminal 64 is connected in parallel with the ventilation direction of the palm-side air supply path 16.

  Therefore, since the area occupied by the terminal portion 62 can be reduced in the flow path cross-sectional area of the palm-side cover air duct portion 84, a larger heat flux can be given to the air.

  The palm side channel 40, which is one of the channels branched in the intake passage, has been described above, but the other side A channel 41 shown in FIG. The flow path 41 and the palm side fan motor suction port 13 are the former side fan motor suction port 23, and the palm side fan motor 14 is the former side fan motor 24 and the palm side fan motor discharge port 15. The former side fan motor discharge port 25, the palm side air supply path 16, the former side air supply path 26, the palm side warm air heater 19, the former side warm air heater 29, and the palm side fan. The motor cover 54 is the upper fan motor cover 55, the palm outlet nozzles 17, 17,... Are the upper outlet nozzles 27, 27,. The enormous portion 28 and the palm side cover portion 74 are the instep side cover portion 75 and the palm side cover air passage. The part 84 is replaced with the instep side cover air passage part 85, so that the same can be said about the gist according to the present invention, and thus detailed description thereof is omitted.

  In the present invention, warm air heaters are provided on the palm side and the instep side, respectively, so that the energization amount to the palm side warm air heater 19 is made larger than the energization amount to the instep side warm air heater 29. This makes it easier to increase the amount of heating on the palm side than on the back side, while suppressing the temperature of the warm air blown on the back side of the hand while slightly raising the palm side warm air temperature. The drying effect on the side can be enhanced.

  The palm-side warm air heater 19 and the instep-side warm air heater 29 may be the same warm air heater, that is, the heater capacity, the shape, material and contact efficiency of the heat exchanging portion. In that case, by increasing the air flow rate on the palm side than on the back side, the heat transfer promoting effect by increasing the speed of the wind passing through the palm-side warm air heater 19 causes the air flow from the palm side blowing nozzle 17. The hot air temperature to be emitted can be made higher than that of the former side. When the same fan motor is used for the palm side fan motor 14 and the back side fan motor 24, energization of each fan motor is performed so that the rotation speed of the palm side fan motor 14 is larger than that of the back side fan motor 24. What is necessary is just to control quantity and you may use the fan motor from which ventilation capability differs.

  Moreover, although the present invention has been described through the embodiments, the present invention is not limited to the above-described embodiments, and may be modified as appropriate without departing from the technical idea of the present invention.

It is a perspective view which shows the use condition of the hand dryer which concerns on this embodiment. It is a perspective view which shows the whole external appearance of the hand dryer which concerns on this embodiment. It is a front view of the hand dryer of the state which removed the surface cover. It is explanatory drawing of the warm air heater vicinity of the hand dryer which concerns on this embodiment. It is AA sectional drawing of the hand dryer concerning this embodiment. It is BB sectional drawing of the hand dryer which concerns on this embodiment.

Explanation of symbols

Hand 2
Hand dryer 10
Palm fan motor 14
Palm-side airway 16
Palm side blowing nozzle 17
Palm side huge part 18
Palm side warm air heater 19
Upper side fan motor 24
Instep airway 26
Upper side outlet nozzle 27
Instep side huge part 28
Upper side warm air heater 29
Palm Fan Motor Cover 54
Upper side fan motor cover 55
Heat exchanger 61
Terminal part 62
Palm side cover 74
Upper side cover part 75
Palm side cover air passage 84
Upper side cover air passage 85

Claims (4)

A hand drying chamber into which the user's hand is inserted, a back side blowing nozzle that blows wind toward the back of the user's hand, and a palm side blowing nozzle that blows wind toward the user's palm,
A hand-drying device that blows and dries air from each of the blowing nozzles on both the back and the back of the user's hand,
An upper side hot air heater that heats the air blown to the upper side blowing nozzle, and a palm side hot air heater that heats the air blown to the palm side blowing nozzle;
The amount of current supplied to the palm-side warm air heater is set to be greater than the amount of electricity supplied to the back-side warm air heater so that the temperature of the warm air blown to the palm is higher than the temperature of the warm air blown to the back of the hand. Hand drying device characterized by. An upper fan motor that blows air to the upper blow nozzle, and a palm fan motor that blows air to the palm blow nozzle;
Each air supply path for blowing air from each fan motor to each blowing nozzle,
Each of the upper side fan motor and the palm side fan motor is covered with a fan motor cover communicating with each of the air supply paths,
Each of the fan motor covers is formed so as to protrude from a part of the circumferential surface of the cover portion with a width smaller than the diameter of the circular surface of the cover portion. It consists of a cover air passage connected to each air supply passage
The hand dryer according to claim 1, wherein the warm air heater is housed in the cover air passage section. The warm air heater has a heat exchanging portion that transfers heat in contact with the wind blown from the fan motor, and a terminal portion that connects an electric wire that supplies electric power to the warm air heater,
The terminal portion includes a heater terminal protruding in a longitudinal direction of the heat exchange portion, and a conductor terminal having a conductor for energizing the warm air heater,
The hand dryer according to claim 2, wherein the heater terminal and the conductive wire terminal are connected so as to cross at a substantially right angle, and the conductive wire terminal is connected in parallel with the ventilation direction . Between each of the blowing nozzles of the hot air heater, there is a convection part capable of natural convection of the air heated by the hot air heater,
The hand dryer according to claim 2 or 3, wherein the air in the convection section is heated by energizing the warm air heater before the operation of the fan motor.

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