JP2011033291A - Air current blowout device and hand drying device using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air current blowout device enabling setting of small oscillating frequency of high pressure air, kept compact without causing deformation of circulating air courses even when the circulating air courses are long and capable of achieving stable oscillation of the high pressure air, and a hand drying device using the air current blowout device. <P>SOLUTION: The air current blowout device 11 includes case bodies 18, and the circulating air courses 21 are formed within the case bodies 18. The hand drying device uses the air current blowout device 11. Even when the circulating air courses are long, the air current blowout device 11 can be kept compact without causing deformation of the circulating air courses, and stable oscillation of high pressure air can be achieved. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to an air flow blowing device and a hand drying device using the same.

  Conventionally, this type of air blowout device has a circulation air passage that branches the flow path in the middle of the blowout opening that expands from the inlet to the downstream so as to periodically change the flow of high-pressure air, and connects both end faces. (For example, refer to Patent Document 1). Here, the oscillation frequency of the high-pressure air can be controlled by changing the length of the circulation air path. Specifically, when the length of the circulation air path is shortened, the oscillation frequency is increased, and when the length is increased, the oscillation frequency is decreased. By periodically changing the flow of high-pressure air, it is possible to supply high-pressure air over a wide range, and it is possible to reduce power consumption by reducing the air volume while maintaining the wind speed compared to simply arranging multiple nozzles. It can be done.

  Hereinafter, an example of the airflow blowing device will be described with reference to FIG. As shown in FIG. 8, a slit-like air outlet 102 is formed by a diffuser 101 that expands in a fan shape, and a float air outlet 104 that blows high-pressure air to a narrow portion inlet 103 of the diffuser 101 is disposed. Both end openings 106 and both end openings 107 of the circulation air passage 105 are disposed at the connection between the narrow portion inlet 103 and the float outlet 104, and a cylindrical or prismatic splitter 108 is provided in the middle of the enlarged portion of the diffuser 101. It has a configuration.

JP-A-8-145450

  In such a conventional air blowing device, when the oscillation frequency of high-pressure air is set to be small, there is a problem that the circulation air path becomes long and the air blowing device becomes large. In addition, when incorporating the air blowout device into other devices, the circulation air passage can be configured with a flexible silicone tube or the like in order to fit the circulation air passage in a compact manner. There was a problem that stable high-pressure air oscillation could not be obtained because the air passage was easily crushed and deformed.

  The present invention solves the above-described conventional problems, and even when the oscillation frequency of high-pressure air is set to be small, the increase in the size of the airflow blowing device can be suppressed, and the circulation can be performed even when external force is applied to the circulation air passage. Stable oscillation of high-pressure air is obtained without deformation of the air path, high-pressure air can be supplied over a wide range, and consumption is achieved by reducing the air volume while maintaining the wind speed compared to simply arranging multiple nozzles An object of the present invention is to provide an air flow blowing device capable of reducing electric power and a hand drying device using the same.

  In order to achieve this object, the present invention provides an airflow blowing device characterized in that the airflow blowing device includes a box and a circulation air passage is formed inside the box. To achieve the intended purpose.

  According to the present invention, a suction port for taking in high-pressure air, a rectangular blowout port that expands outward, a rectangular main flow channel that communicates the blowout port from the suction port, and a long side of the main flow channel An air flow outlet that divides from one side and circulates the high-pressure air blown from the outlet in the direction of the short side of the main flow path, having a circulation air passage that communicates with the long side face of the opposite main flow path In the apparatus, the air flow blowing device includes a box, and the circulation air path is formed inside the box. Enlargement of the airflow blowing device can be suppressed by storing the circulation air passage. In addition, since the circulation air passage is formed inside the box, the shape of the circulation air passage does not change even when force is applied from the outside, so that high-pressure air can be stably oscillated, and it can be widely used. High-pressure air can be sent, and power consumption can be reduced by reducing the air volume while maintaining the wind speed as compared with the case where a plurality of nozzles are simply arranged.

The perspective view of the airflow blowing apparatus of Embodiment 1 of this invention Sectional perspective view of the nozzle part of the airflow blowing device of Embodiment 1 of this invention 1 is an exploded view of a circulation air passage portion of the air flow blowing device according to Embodiment 1 of the present invention. Sectional perspective view of the circulation air-path part of the airflow blowing apparatus of Embodiment 2 of this invention Schematic sectional view of the hand-drying apparatus of Embodiment 3 of the present invention Schematic cross-sectional view of a hand dryer according to Embodiment 4 of the present invention The figure which shows the measurement result of the frequency and the manual drying time of the high pressure air of Example 1 of this invention Sectional drawing which shows an example of a prior art

  The air flow blowing device according to claim 1 of the present invention is a suction port for taking in high-pressure air, a rectangular blow-out port that expands outward, a rectangular main channel that communicates the blow-out port from the suction port, A high-pressure air that branches off from one side on the long side of the main flow path and communicates with a surface on the long side of the main flow path on the opposite side. In the air flow blowing device that vibrates in the side direction, the air flow blowing device includes a box, and the circulation air passage is formed inside the box. Thereby, the enlargement of an airflow blowing apparatus can be suppressed by putting a circulation air path in the inside of the defined box. In addition, since the circulation air passage is formed inside the box, the shape of the circulation air passage does not change even when force is applied from the outside, so that high-pressure air can be stably oscillated, and it can be widely used. High-pressure air can be sent, and power consumption can be reduced by reducing the air volume while maintaining the wind speed as compared with the case where a plurality of nozzles are simply arranged. Here, the high-pressure air indicates an atmospheric pressure or higher.

  In addition, the circulation air passage is folded twice or more inside the box body. By increasing the number of turns, the circulation air passage can be accommodated in a box body of an arbitrary shape. The degree of freedom in designing the device can be improved.

  Further, the circulation air passage is folded on a plane inside the box, and the circulation air passage is folded in the normal direction from the plane and arranged three-dimensionally, By increasing the number of turns, the circulation air path can be accommodated in a box having an arbitrary shape, so that the degree of freedom in designing the air flow blowing device can be improved.

  In addition, the box body can be removed from the airflow blowing device. If a defect occurs in the airflow blowing device due to foreign matter entering the circulation air passage, it can be easily repaired by replacing the box. It is possible to improve the maintainability of the air flow blowing device.

  Also, the box can be disassembled. When a defect occurs in the air blowout device due to foreign matter entering the circulation air passage, the inside of the box is disassembled and repairs such as cleaning are performed. And maintainability of the airflow blowing device can be improved.

  In addition, a sealing means for preventing air leakage is provided in the circulation air passage of the box body, so that air leakage can be prevented even if some distortion occurs in the box body due to operating temperature conditions, etc. High-pressure air can be oscillated stably.

  In addition, the cross-sectional area of the circulation air passage is 0.25 times or more of the cross-sectional area of the main flow passage, and a sufficient pressure change is generated to vibrate high-pressure air in the circulation air passage. And can stably oscillate high-pressure air.

  In addition, the inner surface of the circulation air passage is water-repellent, and even when the inside of the circulation air passage is dirty, the dirt can be easily wiped off, improving the maintainability of the air blowing device. be able to.

  In addition, the inner surface of the circulation air passage is hydrophilic, and even if the inside of the circulation air passage is dirty, the dirt can be easily washed away with water, so the air blowing device can be maintained easily. Can be improved.

  In addition, the length of the circulation air path can be changed, and the oscillation frequency of the high-pressure air can be arbitrarily changed.

  In addition, the circulation air passage is provided with a branch portion, the circulation air passage is branched into a plurality by the branch portion, and the length of the plurality of circulation air passages after branching is different, and a damper is installed in the branch portion, The damper is characterized in that any one of the circulation air passages can be ventilated by the damper, and the length of the circulation air passage can be changed by switching the circulation air passage by the damper. The oscillation frequency can be changed.

  A hand drying chamber having a space in which a hand can be inserted, an air flow blowing device according to any one of claims 1 to 11 that blows high pressure air toward the hand drying chamber, and high pressure air is supplied to the air flow blowing device. A hand drying device provided with a high-pressure air generating device and an air passage connecting the air flow blowing device and the high-pressure air generating device, and the circulation air passage is formed inside the box, Since the shape of the circulation air passage does not change even if the air pressure is added, the high-pressure air can be vibrated stably, and a hand-drying device that can obtain stable drying performance can be obtained.

  Further, the oscillation frequency of the high pressure air is set to 100 Hz or more. If the frequency of the high pressure air is 100 Hz or more, the high pressure air moves the water droplet and then the water droplet returns faster than the following. Since high-pressure air can be applied to water droplets, it is possible to efficiently perform manual drying.

  Also, the box is in contact with a part of the air path of the hand dryer, and the box is in contact with a part of the air path of the hand dryer, thereby improving the strength of the air path of the contacted part. Since the noise from the contacted part can be absorbed by the cavity inside the circulation air passage, the noise can be reduced.

  In addition, a part of the box is integrated with the air passage of the hand dryer, and the number of parts can be reduced and the number of assembly steps can be reduced. Further, since the strength of the air passage can be increased and the noise from the contacted portion can be absorbed by the cavity inside the circulation air passage, the noise can be reduced.

  In addition, the box can be removed from the hand dryer, and if the air blowout device becomes defective due to foreign matter entering the circulation air passage, the box is removed for easy repair. And maintainability of the hand dryer can be improved.

  In addition, the box is arranged so that water and foreign matter do not enter the box, and water is prevented from entering the circulation air passage when cleaning the hand dryer. Therefore, the high-pressure air can be vibrated stably, and a hand-drying device that can obtain stable drying performance can be obtained.

  In addition, it is characterized in that the box is arranged above the outlet, and when cleaning the hand dryer, water can be prevented from entering the circulation air passage, so that it is stable. High-pressure air can be vibrated, and a hand-drying device that can obtain stable drying performance can be obtained.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
As shown in FIG. 1, the air flow blowing device 11 includes a nozzle portion 12 and a circulating air passage portion 13 that are detachably provided at a connection portion 26. FIG. 2 is a perspective view of a cross section of the nozzle portion 12 cut along the plane A, and FIG. 3 is an exploded view of the circulation air passage portion 13. As shown in FIGS. 2 and 3, the nozzle portion 12 includes a suction port 15 for taking in the high-pressure air 14, a rectangular blowout port 16 that expands outward, and a rectangular mainstream that connects the blowout port 16 through the suction port 15. It is composed of a path 17. The circulating air passage portion 13 branches into the box 18 from one side a19 on the long side of the main flow path 17 and has an inner surface communicating with the surface b20 on the long side of the main flow path 17 on the opposite side. An O-ring which includes a circulating air passage 21 which is water-based and prevents air leakage when connecting the silicon sheet 22 which is a sealing means for preventing air leakage from the circulating air passage 21 with the nozzle portion 12 and the connection portion 26. 23, each component is configured to be integrated by screwing in the hole 24 from the direction B. Here, the high-pressure air 14 of, for example, 10 kPa passing through the main flow path 17 drives the gas in the circulation air passage 21 by the pressure difference between the long side surface a19 and the surface b20 of the main flow path 17, and as a result the pressure difference The high-pressure air 14 blown out from the blow-out port 16 is self-excited in the high-pressure air vibration direction 25 by reversing and driving the gas again. At this time, the cross-sectional area of the circulation air passage 21 was 0.25 times the cross-sectional area of the main flow passage 17. When the cross-sectional area is less than 0.25 times, high-pressure air does not oscillate stably, which is not desirable. There is no particular problem as long as the upper limit of the cross-sectional area of the circulation air passage 21 is within the size allowed in the design of the airflow blowing device 11.

  According to such a configuration, it is possible to suppress an increase in the size of the air flow blowing device by placing the circulation air passage inside the box defined to have a desired size, for example, a size of about 64 cm 3. In addition, since the circulation air passage is formed inside the box, the shape of the circulation air passage does not change even when force is applied from the outside, so that high-pressure air can be stably oscillated, and it can be widely used. High-pressure air can be sent, and power consumption can be reduced by reducing the air volume while maintaining the wind speed as compared with the case where a plurality of nozzles are simply arranged.

  In addition, since the circulation air passage is folded three-dimensionally a plurality of times, the circulation air passage can be stored in a box having an arbitrary shape by increasing the number of turns, thereby improving the degree of freedom in designing the air flow blowing device. be able to. In addition, since the nozzle part and the circulation air passage part can be attached and detached at the connection part, if a defect occurs in the air flow blowing device due to foreign matter entering the circulation air passage, it can be repaired easily by replacing the box. It is possible to improve the maintainability of the airflow blowing device. At this time, as an example of the connection method, a method of inserting cylindrical tubes provided in the nozzle portion and the circulation air passage portion and fixing them with an O-ring provided in the circulation air passage portion has been shown. Other methods can be used as long as they do not occur.

  In addition, since the box can be disassembled, if the air blowout device becomes defective due to foreign matter entering the circulation air passage, the inside of the box can be disassembled and repaired such as cleaning. The maintainability of the apparatus can be improved. In addition, since air leakage from the circulation air passage can be prevented, high-pressure air can be stably oscillated. Since the cross-sectional area of the circulation air passage is 0.25 times or more the cross-sectional area of the main flow passage, it is possible to cause a pressure change sufficient to vibrate the high-pressure air in the circulation air passage, and the high pressure stably. Air can be oscillated. Here, an increase in the cross-sectional area of the circulation air passage leads to an increase in the size of the air flow blowing device, and therefore the upper limit of the cross-sectional area of the circulation air passage is within an allowable range in the design size of the air flow blowing device.

  In addition, since the inner surface of the circulation air passage is water-repellent, even when the inside of the circulation air passage is dirty, the dirt can be easily wiped off, so that the maintainability of the airflow blowing device can be improved. Here, the water repellency refers to a surface state in which the contact angle of water is 90 degrees or more and 180 degrees or less. As a method for creating a water-repellent surface state, a known method such as applying a fluororesin polymer compound or a silicon resin polymer compound can be used.

(Embodiment 2)
The same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted. As shown in the cross section of the circulation air passage portion in FIG. 4, the circulation air passage portion is provided with a damper a 27 and a damper b 28 at the branch portion of the circulation air passage 21 having a hydrophilic inner surface inside the box 18 and the circulation air passage 21. In addition, the length of the circulation air passage 21 after branching is different.

  According to such a configuration, since the length of the circulation air path can be changed by switching the circulation air path using the damper, the oscillation frequency of the high-pressure air can be changed. In addition, since the inner surface of the circulation air passage is hydrophilic, even when the inside of the circulation air passage is dirty, the dirt can be easily washed away with water, so that the maintainability of the airflow blowing device can be improved. Here, hydrophilicity refers to a surface state in which the contact angle of water is 0 ° to 40 °. As a method for creating the hydrophilic surface state, a known method such as applying a hydrophilic material such as silica or a titania phosphate compound can be used.

(Embodiment 3)
The same parts as those in the first or second embodiment are denoted by the same reference numerals, and detailed description thereof is omitted. As shown in FIG. 5, the hand drying device a29 includes a hand drying chamber 30 having a space in which a hand can be inserted, an airflow blowing device a31 that blows high-pressure air 14 toward the hand drying chamber 30, and an airflow blowing device a31. A high-pressure air generator 32 that supplies the high-pressure air 14 and an air passage 33 that connects the air flow blowing device a31 and the high-pressure air generator 32 are provided. The airflow blowing device a31 is configured by a nozzle portion 12 and a circulating air passage portion 13 that is disposed above the nozzle portion 12 and is detachably provided. Here, the air flow blowing device a31 is designed so that the oscillation frequency of the high-pressure air 14 is 100 Hz or more.

  According to such a configuration, since the circulation air passage is formed inside the box, the shape of the circulation air passage does not change even when a force is applied from the outside, so that the high-pressure air is stably vibrated. And stable drying performance can be obtained. In addition, if the frequency of the high-pressure air is 100 Hz or more, after the high-pressure air moves the water droplet, the next high-pressure air can be applied to the water droplet faster than the water droplet returns. it can. In addition, since the box of the circulation air passage can be removed from the hand dryer, if the air blow-out device fails due to foreign matter entering the circulation air passage, the box can be removed and repaired easily. And maintainability of the hand dryer can be improved. In addition, by arranging the box of the circulation air path part above the outlet of the nozzle part, when cleaning the hand dryer, it is possible to prevent water from entering the inside of the circulation air path, High-pressure air can be vibrated stably, and a hand-drying apparatus that can obtain stable drying performance can be obtained.

(Embodiment 4)
The same parts as those in any of Embodiments 1 to 3 are denoted by the same reference numerals, and detailed description thereof is omitted. As shown in FIG. 6, the hand drying device b34 includes a hand drying chamber 30 having a space in which a hand can be inserted, an airflow blowing device b35 that blows high-pressure air 14 toward the hand drying chamber 30, and an airflow blowing device b35. A high-pressure air generator 32 that supplies the high-pressure air 14 and an air passage 33 that connects the air flow blowing device b35 and the high-pressure air generator 32 are provided. The air flow blowing device b35 includes a circulation air passage portion 13 integrated with the nozzle portion 12 and the wall of the air passage.

  According to such a configuration, the box body is in contact with a part of the air passage of the hand dryer, thereby increasing the strength of the air passage in the contact portion, and the noise from the contact portion in the cavity inside the circulation air passage. Since it can be absorbed, noise can be reduced. Further, by integrating a part of the box with the air passage of the hand dryer, the number of parts can be reduced and the number of assembly steps can be reduced.

Example 1
A hand drying device a29 having the configuration shown in FIG. 5 was created, and the oscillation frequency of high-pressure air was arbitrarily changed to measure the time required for hand drying. As a specific configuration of the hand-drying device, seven air current blowing devices a31 are arranged 85 mm apart and arranged on both sides in a straight line at a pitch of 35 mm. Measurement was carried out with a wind of / s. The hand drying time was wet with both hands so that 0.8 g of water would adhere, and the time when the amount of water remaining in one hand was 0.1 g was defined as the hand drying time. The measurement results are shown in FIG. As shown in FIG. 7, it can be seen that the hand drying time is shortened as the frequency is increased. Moreover, the hand drying time is constant above 100 Hz. This is considered to be because hand-drying can be performed efficiently because the next high-pressure air can be applied to the water droplet faster than the water droplet returns after the high-pressure air moves the water droplet at 100 Hz or higher.

  The airflow blowing device according to the present invention can be applied to a hand-drying device that blows off water droplets attached to the hand, and can also be applied to uses for removing water droplets and dust attached to an object with high-pressure air.

DESCRIPTION OF SYMBOLS 11 Airflow blowing apparatus 12 Nozzle part 13 Circulating air path part 14 High pressure air 15 Inlet 16 Outlet 17 Main flow path 18 Box 19 Surface a
20 side b
21 Circulating air path 22 Silicon sheet 23 O-ring 24 Hole 25 High-pressure air vibration direction 26 Connection 27 Damper a
28 Damper b
29 Hand dryer a
30 Hand drying room 31 Air blowout device a
32 High pressure air generator 33 Air passage 34 Hand dryer b
35 Airflow blowing device b
DESCRIPTION OF SYMBOLS 101 Diffuser 102 Outlet 103 Narrow part inlet 104 Float outlet 105 Circulation air path 106 Both-ends opening 107 Both-ends opening 108 Splitter

Claims (18)

A suction port for taking in high-pressure air, a blowout port that expands outward in a rectangular shape, a rectangular main channel that communicates the blowout port from the suction port, and a branch from one side on the long side of the main channel, An air flow blowing device comprising a circulating air passage communicating with a surface on the long side of the opposite main flow path, wherein the high pressure air blown from the blow opening is vibrated in a short side direction of the main flow path. The apparatus is provided with a box, and the circulation air passage is formed inside the box. The airflow blowing device according to claim 1, wherein the circulation air passage is folded back twice or more inside the box. 3. The circulating air passage is folded on a plane inside the box, and the circulating air passage is folded in the normal direction from the plane and arranged three-dimensionally. The airflow blowing device described. The airflow blowing device according to any one of claims 1 to 3, wherein the box is removable from the airflow blowing device. The airflow blowing device according to any one of claims 1 to 4, wherein the box can be disassembled. The airflow blowing device according to any one of claims 1 to 5, wherein a sealing means for preventing air leakage is provided in the circulation air passage of the box. The airflow blowing device according to any one of claims 1 to 6, wherein the cross-sectional area of the circulation air passage is 0.25 times or more the cross-sectional area of the main flow passage. The airflow blowing device according to any one of claims 1 to 7, wherein an inner surface of the circulation air passage is water repellent. The airflow blowing device according to any one of claims 1 to 8, wherein an inner surface of the circulation air passage is hydrophilic. The airflow blowing device according to any one of claims 1 to 9, wherein the length of the circulation air passage can be changed. A circulation air passage is provided with a branch portion, and the circulation air passage is branched into a plurality by the branch portion, and a plurality of the circulation air passages after the branch are different in length, and a damper is installed in the branch portion. The air flow blowing device according to any one of claims 1 to 10, wherein any one of the plurality of circulation air paths can be ventilated. A hand drying chamber having a space in which a hand can be inserted, an air flow blowing device according to any one of claims 1 to 11 for blowing high pressure air toward the hand drying chamber, and a high pressure for supplying high pressure air to the air flow blowing device A hand dryer provided with an air generator and an air passage connecting the air flow blowing device and the high pressure air generator. The hand dryer according to claim 12, wherein the frequency of the high-pressure air is 100 Hz or more. The hand dryer according to claim 12 or 13, wherein the box is in contact with a part of the air path of the hand dryer. The hand dryer according to any one of claims 12 to 14, wherein a part of the box is integrated with an air passage of the hand dryer. The hand dryer according to claim 12, wherein the box is removable from the hand dryer. The hand dryer according to any one of claims 12 to 16, wherein the box is arranged so that water and foreign matter do not enter the box. The hand dryer according to claim 12, wherein the box is disposed above the outlet.

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