CN104887133B - Drying apparatus for hands - Google Patents

Abstract

The present invention provides a hand drying device, which is provided with: an opening arranged at the lower part of the surface panel; a hand drying chamber, which is provided toward the inside from the opening; a suction port, which sucks air; The high-pressure air after the pressurization of the chamber is ejected as a jet; the main body has a high-pressure air generating part, which is arranged between the suction port and a plurality of discharge ports and makes the air high-pressure air; the flow path, which communicates A suction port and a plurality of discharge ports, and a fluid element nozzle is provided between the plurality of discharge ports and the high-pressure air generating part. The flow vibrates in the direction of the short side of the rectangle of the main channel. The high-pressure air generation part is arranged above the hand drying chamber. The noise generated by the air generating part is transmitted to the surface panel.

Description

hand dryer

This application is a divisional application of a patent application with the application number 201080051992.0, the application date being November 10, 2010, and the invention title being a hand drying device.

technical field

The invention relates to a hand drying device.

Background technique

As a conventional hand drying device, a method in which water droplets are peeled off the hands by a jet flow of air to dry the hands is known (for example, refer to Patent Document 1).

Hereinafter, an example of such a hand dryer will be described with reference to FIG. 6 , which is a perspective view showing a conventional hand dryer.

As shown in FIG. 6 , hand drying device 101 has hand drying chamber 103 , high-pressure air generating unit 104 , and water receiving unit 105 into which a hand can be drawn out from insertion port 102 opened to the outside. Here, the high-pressure air generating part 104 and the water receiving part 105 are arranged above and below the hand drying chamber 103, respectively.

The jet flow generated by the high-pressure air generator 104 is sprayed onto the hand inserted into the hand drying chamber 103, and the moisture adhering to the hand is wiped away by the kinetic energy of the jet flow. And, the spray flow is sprayed toward the hand drying chamber 103 from top to bottom at a spray angle of 5° to 30° toward the inside. The reason why the spray flow is sprayed toward the inside of the hand drying chamber 103 is to prevent the brushed water from scattering and splashing on the user.

In such a conventional hand drying device 101, since the spray angle of the spray flow is the above-mentioned angle, even if the hand is inserted horizontally into the hand drying chamber 103, the spray flow is hardly sprayed on the hand.

In order to efficiently utilize the kinetic energy of the jet, it is preferable that the hand is in contact with the jet approximately vertically. However, in order to bring the hand into contact with the jet almost vertically, it is necessary to point the fingertips upward.

prior art literature

patent documents

Patent Document 1: Japanese Patent Laid-Open No. 2004-716

In the conventional hand drying device, if the fingertips are directed upward, the water droplets will move to the user's wrist side, so there is a problem that the clothes are wet and the water droplets remain on the wrist.

Contents of the invention

Therefore, the hand drying device of the present invention is provided with: a hand drying chamber, which is opened toward the inside from the hand insertion side where the hand is inserted, and has an upper surface and a lower surface as an inner wall surface; a suction port, which sucks air; and a plurality of discharge ports, which The high-pressure air boosted in the hand drying chamber is ejected as a jet flow; the main body has a high-pressure air generating part provided between the suction port and a plurality of ejection ports and makes the air high-pressure air; the flow Road, which communicates with the suction port and a plurality of discharge ports. In addition, a plurality of ejection ports are provided on an upper inclined surface that inclines downward from the hand insertion side toward the inside of the upper surface, and the ejection direction of the jet flow is the hand insertion side. In addition, a plurality of discharge ports are arranged such that the discharge direction of the jet flow is concentrated on the central surface of the side wall surfaces on both sides of the main body. The plurality of ejection ports are symmetrical with respect to the central plane and arranged in a V shape with the central plane as a folded plane.

As a result, when the hand is inserted into the hand drying chamber, even if the fingertips are directed downward, the hand can be perpendicular to the jet flow. Therefore, the kinetic energy of the jet flow can be efficiently used. In addition, there will be no water droplets moving to the wrist side to wet the clothes, and no water droplets will remain on the wrist.

A hand drying device according to one aspect of the present invention is provided with: a hand drying chamber, which is opened toward the inside from the hand insertion side where the hand is inserted, and has an upper surface and a lower surface as an inner wall surface; a suction port, which sucks air; and a plurality of discharge ports, It ejects the high-pressure air boosted in the hand drying chamber as a jet flow; the main body has a high-pressure air generating part provided between the suction port and the plurality of discharge ports and The air is made into the high-pressure air; a flow path communicates with the suction port and the plurality of discharge ports, wherein a fluid element nozzle is provided between the plurality of discharge ports and the high-pressure air generating part, and The nozzle of the fluid element is provided with: an inflow port which absorbs the high-pressure air; an outflow port whose cross-section is rectangular in a direction perpendicular to the high-pressure air flow formed by the high-pressure air and expands toward the outside; The inlet is connected to the outlet and has a rectangular cross-sectional shape; the circulating air passage part is branched from the first surface on one long side of the main flow, and is connected with the first surface on the other long side of the main flow. The two surfaces are connected, the nozzle of the fluid element vibrates the jet flow in the direction of the short side of the rectangle of the main channel, the high-pressure air generating part is arranged above the hand drying chamber, and the circulating air channel part is arranged on the Between the upper surface panel of the hand drying chamber and the high-pressure air generating part, noise generated from the high-pressure air generating part is suppressed from being transmitted to the surface panel, and the plurality of ejection ports are provided on the upper surface On the upper slope that inclines downward from the hand insertion side toward the inner side, the spray direction of the spray stream is set to make the spray stream come into contact with the hand inserted into the hand drying chamber. The hand is inserted to the side.

In the hand drying device of the present invention, the upper surface may be turned around the central surface so that the spray direction of the jet flow is concentrated on the central surface of the side wall surfaces on both sides of the main body. The plurality of ejection ports are symmetrically arranged in a V-shape, and a row of water droplets in a direction substantially perpendicular to the hand insertion direction are blown away by the plurality of ejection ports.

Description of drawings

Fig. 1 is a perspective view of a hand dryer according to Embodiment 1 of the present invention.

Fig. 2 is a cross-sectional view showing the structure of the hand dryer.

Fig. 3 is a perspective view of a fluid element nozzle of the hand dryer.

Fig. 4 is a sectional perspective view of a hand dryer according to Embodiment 2 of the present invention.

Fig. 5 is an enlarged perspective view of a movable nozzle of the hand dryer.

Fig. 6 is a perspective view showing a conventional hand dryer.

Detailed ways

Embodiments of the present invention will be described below using the drawings.

(Embodiment 1)

FIG. 1 is a perspective view of a hand dryer according to Embodiment 1 of the present invention, and FIG. 2 is a cross-sectional view showing the structure of the hand dryer. As shown in Figures 1 and 2, the hand drying device 11 includes: a hand drying chamber 12, a plurality of discharge ports 15, an upper inclined surface 31, a suction port 16, a flow path 17, a main body 65 having a high-pressure air generating part 18, and a fluid element. Nozzle 20.

Here, the hand drying chamber 12 has an opening 32 through which a hand can be inserted. Furthermore, the hand drying chamber 12 is a space widening from the hand insertion side 60 where the hand is inserted to the inner side 61, and has an upper surface 63 and a lower surface 64 as inner wall surfaces. The upper inclined surface 31 is a part of the upper surface 63 and inclines downward from the hand insertion side 60 toward the inner side 61 of the hand drying chamber 12 .

The flow path 17 communicates with the suction port 16 provided on the upper surface 63 and the plurality of discharge ports 15 provided on the upper slope 31 . The high-pressure air generator 18 is provided between the suction port 16 and the plurality of discharge ports 15, and boosts the air sucked in from the suction port 16 to become high-pressure air. The fluid element nozzle 20 is disposed between the plurality of discharge ports 15 and the high-pressure air generator 18, and vibrates the jet flow 13 at a vibration frequency of 100 Hz in the jet vibration direction 19 substantially perpendicular to the hand insertion direction 14.

Then, the boosted high-pressure air is jetted toward the hand inserted into the hand drying chamber 12 as the jet flow 13 toward the hand insertion side 60 from top to bottom.

The plurality of discharge ports 15 are arranged such that the discharge directions of the jet stream 13 are substantially concentrated on the central surfaces 23 of the side wall surfaces 22 on both sides of the hand dryer 11 . It should be noted that only one side wall surface 22 is shown in FIG. 1 . That is, the plurality of ejection ports 15 are arranged symmetrically with respect to the central plane 23 in a V shape with the central plane 23 as a turning plane. In addition, a water receiving portion 21 is provided at a position facing the plurality of ejection ports 15 so as to be substantially perpendicular to the ejection direction of the jet stream 13 ejected from the plurality of ejection ports 15 .

Fig. 3 is a perspective view of a fluid element nozzle of the hand dryer according to Embodiment 1 of the present invention. The fluid element nozzle 20 includes an inflow port 24 , an outflow port 25 , a main flow path 26 , and a circulation air path portion 29 . Here, high-pressure air is introduced from the inflow port 24 . The cross section of the outflow port 25 in the direction perpendicular to the high-pressure air flow 68 is substantially rectangular and expands outward. The main passage 26 communicates with the outlet 25 from the inlet 24 , and the cross-sectional shape of the main passage 26 is substantially rectangular. Circulating air passage portion 29 branches from first surface 27 on one long side of the rectangular cross section of main passage 26 , and communicates with second surface 28 on the other long side of main passage 26 .

The pressure difference between the first surface 27 and the second surface 28 is driven to reverse the pressure difference between the first surface 27 and the second surface 28 by driving the high-pressure air inside the circulating air passage portion 29 . Then, by driving the high-pressure air again, the jet stream 13 ejected from the outflow port 25 vibrates in the jet stream vibration direction 19 which is the short side direction of the rectangular cross section of the main flow path 26 .

In addition, as shown in FIG. 2 , the circulating air path portion 29 of the fluid element nozzle 20 is arranged between the surface panel 30 of the main body 65 of the hand dryer 11 and the high-pressure air generating portion 18 . In the embodiment of the present invention, high-pressure air means air having a pressure higher than atmospheric pressure, for example, about 3 kPa to 12 kPa. As the high-pressure air generation part 18 which generates high-pressure air, a blower etc. are mentioned.

In addition, as the jet flow 13, a high-speed wind having a wind speed of about 50 m/s to 130 m/s is preferable. Here, as an example, the vibration frequency of the jet stream 13 is 100 Hz, but if it is less than 20 Hz, then the vibration of the jet stream 13 is not faster than the speed of drawing out the hand, so the jet stream may not be able to touch the whole hand, so it cannot be fully vibrated. If it exceeds 1000Hz, the formation of the constant velocity zone of the jet becomes insufficient, and before the jet hits the hand, the wind speed attenuation becomes larger, and the force of blowing the water droplets becomes weaker, so it is not preferable . Therefore, if the vibration frequency of the jet flow 13 is not less than 20 Hz and not more than 1000 Hz, the effect of the jet flow vibration can be sufficiently obtained.

According to such a structure, when using the hand dryer 11, when inserting a hand into the hand drying chamber 12, it becomes easy to put a fingertip downward. Therefore, in addition to the kinetic energy of the jet flow 13, water droplets are dropped using gravity, and hand drying can be efficiently achieved. Even when the hand is brought into contact with the jet 13 approximately vertically in order to effectively utilize the kinetic energy of the jet 13, the water droplets do not move to the user's wrist side, preventing the clothes from getting wet and the water droplets from remaining on the wrist.

In addition, since the suction port 16 is provided on the inner wall surface of the hand drying chamber 12, it is possible to reduce the outflow of the jet stream 13 ejected from the plurality of discharge ports 15 to the outside of the hand drying chamber 12. Therefore, water splashing to the outside of the hand drying chamber 12 is reduced, and water can be prevented from splashing to the user.

In addition, a water receiving portion 21 is provided at a position facing the plurality of ejection ports 15 so as to be substantially perpendicular to the ejection direction of the jet stream 13 ejected from the plurality of ejection ports 15 . Therefore, the water droplets blown off from the hand by the jet stream 13 ejected from the plurality of ejection ports 15 are caught by the water receiving portion 21 , and the water droplets can be prevented from scattering to the outside of the hand drying chamber 12 . Here, if the surface of the water receiving part 21 is smooth, the noise generated when the jet stream 13 hits the water receiving part 21 can be reduced.

In addition, a plurality of outlets 15 are symmetrically arranged in a V-shape with the central plane 23 as a turning plane relative to the central plane 23, so that the jets 13 ejected from the plurality of outlets 15 are roughly concentrated on two sides of the hand dryer 11. The central surface 23 of the side wall surface 22. Therefore, since the ejection directions of a plurality of jet streams 13 are roughly concentrated on the central surface 23 of the two side wall surfaces 22 of the hand dryer 11, the water droplets blown away by the jet stream 13 from the hands are also concentrated near the central plane 23. . As a result, water droplets can be prevented from scattering to the outside of hand drying chamber 12 . In addition, when the user rubs his hands near the central surface 23 when drying his hands, the jet stream 13 is concentrated on the rubbing hands, so that the hands can be dried efficiently.

In addition, by vibrating the jet stream 13 ejected from the plurality of ejection ports 15, the jet stream 13 can be sent out over a wide range. Therefore, the number of the plurality of discharge ports 15 can be reduced, the air volume can be reduced while maintaining the wind speed, and the power consumption can be reduced.

In addition, since the jet vibration direction 19 is approximately perpendicular to the hand insertion direction 14, a row of water droplets in a direction approximately perpendicular to the hand insertion direction 14 can be blown away at any position of the hand. As a result, when the hand is pulled out, the water droplets move from the wrist side to the fingertip direction, enabling efficient hand drying without uneven drying.

In addition, since the vibration frequency of the jet stream 13 is not less than 20 Hz and not more than 1000 Hz, the jet stream 13 can be brought into contact with the entire hand, and efficient hand drying can be performed.

In addition, since the fluid element nozzle 20 is used, the jet stream 13 ejected from the plurality of ejection ports 15 vibrates, and the jet stream 13 can be sent out over a wide range. Therefore, the number of the plurality of discharge ports 15 can be reduced, the air volume can be reduced while maintaining the wind speed, and the power consumption can be reduced.

In addition, since there is no movable part in the fluid element nozzle 20, there is no deterioration of the movable part, and long-term stable jet vibration can be realized. In addition, since the fluid element nozzle 20 does not require a drive unit, the hand dryer 11 can be downsized.

In addition, the circulating air path portion 29 of the fluid element nozzle 20 is arranged between the surface panel 30 of the hand dryer 11 and the high-pressure air generating portion 18 . As a result, the circulating air passage part 29 becomes an obstacle for the noise generated by the high-pressure air generating part 18 to propagate to the surface panel 30, and the noise is suppressed, so that the noise is reduced. In addition, since the circulation air passage part 29 is arranged in the main body 65 of the hand dryer 11, it is possible to prevent the circulation air passage part 29 from being damaged due to external impact or the like. Therefore, long-term stable jet vibration can be realized.

(Embodiment 2)

Fig. 4 is a sectional perspective view of a hand dryer according to Embodiment 2 of the present invention. The hand drying device 41 has: a hand drying chamber 42, a plurality of ejection ports 45, a lower inclined surface 55, a suction port 46, a flow path 47 and a main body 65 with a high-pressure air generation part 48, and a plurality of ejection ports 45 and a high-pressure air generation part A movable nozzle 50 is provided between 48 .

Here, the hand drying chamber 42 has an opening 56 through which a hand can be inserted. Furthermore, the hand drying chamber 42 is a space widening from the hand insertion side 60 where the hand is inserted to the inner side 61, and has an upper surface 66 and a lower surface 67 as inner wall surfaces. The lower inclined surface 55 is a part of the lower surface 67 and inclines downward from the hand insertion side 60 toward the inner side 61 of the hand drying chamber 42 .

The flow path 47 communicates with the suction port 46 provided on the upper surface 66 and the plurality of discharge ports 45 provided on the lower slope 55 . The high-pressure air generating unit 48 is provided between the suction port 46 and the plurality of discharge ports 45, and boosts the air sucked from the suction port 46 into high-pressure air. The movable nozzle 50 vibrates the jet 43 at a vibration frequency of 20 Hz in the jet vibration direction 49 substantially perpendicular to the hand insertion direction 44 .

In addition, the hand dryer 41 is provided with a water receiving part 51 at a position facing the plurality of discharge ports 45 . Then, the boosted high-pressure air is ejected from below to above toward the inner side 61 of the hand inserted into the hand drying chamber 42 as the jet flow 43 .

5 is an enlarged perspective view of a movable nozzle of the hand dryer according to Embodiment 2 of the present invention. As shown in FIG. 5 , the movable nozzle 50 is composed of a swing nozzle 52 , a motor 53 and a crank 54 . Here, the swing nozzle 52 is constituted by a movable member. The motor 53 is a drive unit for vibrating the swing nozzle 52 . The crank 54 converts the rotational motion generated by the motor 53 into the linear reciprocating motion of the swing nozzle 52 . By using such a movable nozzle 50, the vibration frequency of the jet stream 43 can be easily controlled by the drive unit.

Examples of the high-pressure air generator 48 , the wind speed of the jet 43 , and the vibration frequency of the jet 43 are the same as those in Embodiment 1 of the present invention.

According to such a configuration, when the hand dryer 41 is used, the jet stream 43 comes into contact with the hand approximately vertically, and the water droplets adhering to the hand move toward the fingertip side due to gravity. Therefore, the kinetic energy of the ejected jet stream 43 efficiently acts on the water droplets, efficiently peels off the water droplets adhering to the hands, and can dry hands with less energy. Also, even when the hand is brought into contact with the jet 43 approximately vertically in order to effectively utilize the kinetic energy of the jet 43 , the water droplet moves toward the fingertip side due to gravity. Therefore, the water droplets do not move to the wrist side of the user, the clothes are not wetted, and the water droplets do not remain on the wrist.

In addition, by vibrating the jet stream 43 ejected from the plurality of ejection ports 45, the jet stream 43 can be sent out over a wide range. Therefore, the number of the plurality of discharge ports 45 can be reduced, the air volume can be reduced while maintaining the wind speed, and power consumption can be reduced. In addition, the vibration frequency of the jet stream 43 can be easily controlled by the driving unit.

In addition, since the vibration direction of the jet stream 43 is approximately perpendicular to the hand insertion direction 44, a row of water droplets in a direction approximately perpendicular to the hand insertion direction 44 can be blown away at any position of the hand. As a result, when the hand is pulled out, the water droplets move from the wrist side to the fingertip direction, enabling efficient hand drying without uneven drying.

Moreover, since the vibration frequency of the jet stream 43 is 20 Hz or more and 1000 Hz or less, the jet stream 43 can be brought into contact with the whole hand, and efficient hand drying can be performed.

In addition, the suction port 46 is provided on the inner wall surface, that is, the upper surface 66 . Therefore, it is possible to reduce the outflow of the jet stream 43 ejected from the plurality of ejection ports 45 to the outside of the hand drying chamber 42, reduce the splashing of water to the outside of the hand drying chamber 42, and prevent the water from splashing on the user.

In addition, a water receiving portion 51 is provided at a position facing the plurality of discharge ports 45 . Therefore, the water droplets blown off from the hands by the jet stream 43 are caught by the water receiving portion 51 , and it is possible to prevent the water droplets from scattering to the outside of the hand drying chamber 42 .

Industrial availability

The hand drying device of the present invention can be used in washrooms, restrooms, etc., because it can efficiently dry moisture adhering to hands without getting wet on clothes. In addition, the hand dryer of the present invention can be used for the purpose of drying articles wetted with liquid.

Symbol Description

11, 41 Hand drying device

12, 42 hand drying room

13, 43 jet stream

14, 44 hand insertion direction

15, 45 outlet

16, 46 Suction port

17, 47 flow path

18, 48 High-pressure air generation part

19, 49 Jet vibration direction

20 Fluid Element Nozzles

21, 51 Water receiving department

22 side wall

23 central face

24 inflow port

25 outlet

26 main road

27 First side

28 Second side

29 Air circulation department

30 surface panels

31 Upper bevel

32, 56 openings

50 movable nozzles

52 swing nozzle

53 electric motor

54 crank

55 lower bevel

60 hand insertion side

61 inside

63, 66 upper surface

64, 67 lower surface

65 subject

68 High pressure air flow

Claims (2)

1. A hand drying device, which has: The hand drying chamber is opened toward the inside from the hand insertion side where the hand is inserted, and has an upper surface and a lower surface as inner wall surfaces; a suction port, which draws in air; a plurality of ejection ports, which eject the high-pressure air boosted in the hand drying chamber as a jet stream; a main body having a high-pressure air generation part provided between the suction port and the plurality of discharge ports and causing the air to be the high-pressure air; a flow path communicating the suction port and the plurality of discharge ports, The hand drying device is characterized in that, A fluid element nozzle is provided between the plurality of ejection ports and the high-pressure air generating part, The nozzle of the fluid element includes: an inlet for sucking the high-pressure air; an outlet for cross-section in a direction perpendicular to a flow of high-pressure air formed by the high-pressure air, which is rectangular and expands toward the outside; a main flow for The air inlet is connected to the outflow port and has a rectangular cross-sectional shape; the circulating air passage part is branched from the first surface on one long side of the main flow, and is connected to the other long side of the main flow. The second side connects, the fluid element nozzle vibrates the jet flow in the short side direction of the rectangle of the main flow path, The high-pressure air generating unit is disposed above the hand drying chamber, and the circulating air passage is disposed between the surface panel above the hand drying chamber and the high-pressure air generating unit, thereby suppressing air generated from the high-pressure air generating unit. noise is transmitted to the surface panel, The plurality of ejection ports are provided on an upper slope of the upper surface that slopes downward from the hand insertion side toward the inner side, The ejection direction of the jet stream is the hand insertion side so that the jet stream comes into contact with the hand inserted into the hand drying chamber. 2. The hand drying device according to claim 1, characterized in that, In such a way that the ejection direction of the jet flow is concentrated on the central surface of the side wall surfaces on both sides of the main body, the upper surface is V-shaped with the central surface as a turning surface, and the plurality of The nozzles are arranged symmetrically, A row of water droplets in a direction substantially perpendicular to the direction in which the hand is inserted is blown away by the plurality of ejection ports.