JP2000308598A - Hand drier suppressed in leakage of polluted air - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hand drier capable of reducing the leakage of polluted air at the time of operation, obtaining sufficient drying effect with a small energy consumption, keeping the inside of a device clean even at the time of stopping operation and suppressing discharge of contamination particles to the outside. SOLUTION: A hand drying chamber 5 communicated with the outside by a hand insertion port 3 is formed inside a main body case 2. Air blowing off nozzles 12 and 13 are mutually opposedly arranged inside the hand insertion port by facing the side of the inner depth of the hand-drying chamber. On the other hand, air channels (21 to 23, 14, 15) for sucking and recovering and purifying air inside the hand drying chamber from an air recovering port 6 at the depth of the hand drying room to forcedly feed to the air blowing out nozzles 12 and 13, a blowing means 10 and an air filtering means 11 are provided inside of a main body case. In addition, an air sending out port 16, a 2nd air filtering means 17 and a small blowing means 18 are provided side by side for feeding out air inside of the hand drying room to the inside of the hand inserting port by purifying without passing through the air channels and the air filtering means.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hand dryer for removing water from a hand after washing and drying the hand.

[0002]

2. Description of the Related Art A hand dryer generally used conventionally has a fan, a filter, and a heater in a main body case, filters air introduced into the main body case by a fan, and heats the air with a heater to generate hot air. The hot air is blown to wet hands, and moisture attached to the hands is blown off by wind pressure and evaporated to dry.

[0003] In such a hand dryer, when the hand is dried, the air blown to the hand flows out of the hand through the insertion port, and contaminated air is discharged into the room. However, there is a problem that, though very small, contaminant particles scattered from the moisture adhering and remaining in the hand drying chamber are discharged to the outside from the hand insertion opening. In addition, heating by a heater or the like is required at the time of the hot air operation, but since the outside air is introduced, the heating efficiency is poor.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above-described problems of the conventional hand dryer, and has the following effects. It is an object of the present invention to provide a hand dryer capable of keeping the inside of the apparatus clean even at the time of stoppage and suppressing the emission of contaminated particles to the outside.

[0005]

Means for Solving the Problems A hand drying chamber which communicates with the outside by the hand insertion port is formed by partitioning the inside of the main body case having an upper hand insertion port opened into a bag shape, and On the inside, while air-discharging nozzles that blow air in a direction intersecting each other toward the inner back side of the hand drying chamber are disposed to face each other, an air recovery port is provided near the ceiling in the back part of the hand drying chamber, and An air flow path, a blowing means, and an air filtering means for sucking and recovering the air inside the hand drying chamber from the air recovery port, purifying the air, and forcing the air to the air blowing nozzle are provided inside the main body case, and the hand drying chamber has a negative pressure. To be kept.
Further, the air inside the hand drying chamber is suctioned and collected without passing through the air flow path to the air blowing nozzle and the air filtering means, and is cleaned and sent to the inside of the hand insertion port. Means and small air blowing means.

[0006]

1 and 2 show a hand dryer 1 according to an embodiment of the present invention. In the figure, a hand dryer 1 has a hand insertion opening 3 above the main body case 2 and an upper front part thereof, and the inside of the main body case 2 is partitioned by a partition wall 4 into a bag shape, so that the hand insertion opening 3 And a hand drying chamber 5 communicating with the hand drying chamber 5.

The hand drying chamber 5 includes an introduction portion 5a extending obliquely downward from the hand insertion opening 3 toward the inside of the apparatus, and an inner back portion 5b following the introduction portion 5a. The inner back portion 5b has a vertical peripheral side wall and a flat surface. Due to the ceiling part, it is slightly wider than the introduction part 5a. And the inner back part 5b which is shaded with respect to the hand insertion direction H
An air recovery port 6 communicating with the inner side of the main body case 2 (negative pressure portion 21) is opened in the ceiling portion. The floor of the hand drying chamber 5 is inclined toward the drain pan 7 provided on the front side of the apparatus.

In the lower part of the main body case 2, partitions 8 and 9 are provided for partitioning the inside of the main body case 2 into negative pressure portions 21 and positive pressure portions 22 and 23, respectively. 2
One commutator blower 10 (blowing means) is provided, and the other partition 9
A high-performance filter 11 (HEPA filter, air filtration means) is provided so as to penetrate the center of the filter.

On the other hand, inside the hand insertion opening 3 and above and below the introduction portion 5a of the hand drying chamber 5, air blowing nozzles 1 are provided, respectively.
2, 13 are provided facing each other. Air jet nozzle 1
Each of the tubular bodies 2 and 13 is provided with a large number of air blowing holes in a linear arrangement on one side of a tubular body having a closed distal end, and the base end thereof is connected to a positive pressure section 23 through duct hoses 14 and 15. It is connected to the.

The blowing direction of each of the air blowing nozzles 12 and 13 forms an inclination angle toward the inner side of the hand drying chamber 5 with respect to the hand insertion direction H from the upper left to the lower right in FIG. They are set to cross each other. In the example shown,
The lower air blowing nozzle 12 is set in the horizontal direction, and the upper air blowing nozzle 13 is set in the vertical lower direction. The blowing air flows merge at an intersection angle of about 90 degrees between them, and the hand insertion direction H The hand inserted along the line is blown at an angle of about 45 degrees.

A main body case 2 is provided inside the hand insertion opening 3 and above the air blowing nozzle 13 of the hand drying chamber introducing portion 5a.
The air outlet 1 for purifying the air in the negative pressure section 21 extending above the air recovery port 6 inside the air drying section 6 and sending the air directly into the hand drying chamber 5.
The air outlet 16 is provided with a second filter 17 (HEPA filter) and a small blower 18. In FIG. 1, 19 is a start sensor, 20 is a control panel, 2
Reference numeral 4 denotes an illumination lamp, and the illumination lamp 24 can select a germicidal lamp according to the installation purpose.

Next, the operation of the hand dryer 1 will be described based on the above embodiment.

First, when the power of the hand dryer 1 is turned on, the activation sensor 19 becomes detectable, and
The small blower 18 is activated. Accordingly, the negative pressure section 21 and the inside of the hand drying chamber 5 communicating with the negative pressure section 21 via the air recovery port 6 become negative pressure, and as shown by the dashed arrow in FIG. The air inside 5 is sucked into the negative pressure section 21 from the air recovery port 6, is cleaned by the second filter 17, is sent out from the air outlet 16 to the inside of the hand insertion port 3, and circulates in the hand drying chamber 5. Is done.

By such a circulating airflow, the hand drying room 5
The inside is always kept at a negative pressure, and the moisture adhering to the wall surface, floor surface, etc. of the hand drying chamber 5 and the contaminant particles scattered from the drain pan 7 are collected by the second filter 17, and the contaminant particles Is prevented from being released from the hand insertion opening 3 to the outside.

In the above standby state, when the user of the hand dryer 1 inserts the wet hand after washing into the hand drying chamber 5 through the hand insertion port 3 and the activation sensor 19 detects it, the small blower 18 Is stopped and the commutator blower 10 is activated, and the commutator blower 10 is
1 is sucked and discharged to the positive pressure section 22.

At this time, the air is heated by the compression action of the commutator blower 10 and the heat generated by the commutator blower 10 (commutator motor M), and further filtered and purified by the high-performance filter 11. In this state, the air is sent from the positive pressure section 23 through the duct hoses 14 and 15 to the air blowing nozzles 12 and 13, and is injected from the air blowing nozzles 12 and 13 into the hand drying chamber 5.

The heated and purified air is blown onto the user's hand as described above, so that water droplets attached to the hand are blown into the hand drying chamber 5 and the moisture on the hand surface is removed. Evaporate and dry. Further, the air flows blown from the air blowing nozzles 12 and 13 merge near the hand insertion position, and the merged air flow goes obliquely downward, so that water droplets blown from the hands are deposited on the wall surface and floor of the hand drying chamber 5. It falls and is collected in the drain pan 7.

On the other hand, when the inside of the negative pressure section 21 becomes negative pressure by the commutator blower 10, the air in the hand drying chamber 5 is sucked into the negative pressure section 21 from the air recovery port 6, and Therefore, the contaminated air blown to the user's hand is recovered from the air recovery port 6 into the negative pressure section 21 without flowing out.

As described above, the air collected from the hand drying chamber 5 is heated and purified again and circulated through the inside of the blowing device to the hand drying chamber 5, so that the temperature of the blowing air gradually increases, and the air heating means is separately provided. The heating effect required for drying can be obtained without providing the heat treatment.

When the user removes his hand and the start sensor 19 no longer senses his hand, the commutator blower 10 is stopped, and the small blower 18 is activated, so that the air in the hand drying chamber 5 is released. The operation is switched from the negative pressure section 21 to the circulation operation in which the air is circulated into the hand drying chamber 5 through the second filter 17 and the air outlet 16, and contaminant particles emitted from moisture remaining in the hand drying chamber 5 are discharged to the outside. The release can be prevented, and the inside of the apparatus including the hand drying chamber 5 can be kept clean.
Further, by preventing contaminated air from flowing through the high-performance filter 11, the life of the high-performance filter 11 can be extended.

In the hand dryer 1 of the above embodiment, the commutator motor M of the commutator blower 10 is disposed in the positive pressure section 22 and the negative pressure section 21 and the hand drying chamber 5 are disposed above the commutator motor M. Thus, the heat generated by the commutator motor M can be effectively used for heating the air, but the arrangement of the devices is not limited to this. Further, the small blower 18 may be kept in the operating state when the commutator blower 10 is operated.

[0022]

Since the hand dryer of the present invention is constructed as described above, it has the following effects.

By circulating the air blown out from the air blow-off nozzle inside the main body case and setting the inside of the hand drying chamber to a negative pressure, it is possible to prevent contaminated air from flowing out.
Due to the heat recovery effect of the circulation operation, hot air operation using only the heat generated by the blower without using an additional air heating means becomes possible, and energy consumption can be reduced.

An air outlet for sucking and purifying the air inside the hand drying chamber without passing through the air flow path to the air blowing nozzle and the air filtering means, purifying the air, and sending it to the inside of the hand insertion port;
Since the second air filtration means and the small air blowing means are provided together, the hand drying room can be kept clean even when the operation of the hand dryer is stopped, and contaminant particles are prevented from being discharged from the hand insertion port to the outside. In addition to being able to do so, by preventing contaminated air from flowing through the main air filtration means when the operation is stopped, the life of the air filtration means can be extended.

[Brief description of the drawings]

FIG. 1 is a schematic side sectional view showing a hand dryer according to an embodiment of the present invention.

FIG. 2 is a schematic front sectional view showing the hand dryer according to the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hand dryer 2 Main body case 3 Hand insertion port 4, 8, 9 Partition wall 5 Hand drying room 6 Air recovery port 10 Commutator blower (blowing means) 11 High-performance filter (air filtering means) 12, 13 Air blowing nozzle 14, 15 Duct hose 16 Air outlet 17 Second filter (second air filtering means) 18 Small blower 21 Negative pressure part 22, 23 Positive pressure part

Claims (2)

[Claims] 1. A hand drying chamber communicating with the outside through the hand insertion port is formed by partitioning the inside of a main body case having a hand insertion port opened upward in a bag shape, and inside the hand insertion port, While the air blowing nozzles that blow air in directions intersecting with each other toward the inner side of the hand drying chamber are opposed to each other, an air recovery port is provided near the ceiling in the inner part of the hand drying chamber, and
An air flow passage, a blowing means, and an air filtering means for sucking and collecting the air inside the hand drying chamber from the air recovery port, cleaning the air, and forcing the air to the air blowing nozzle are provided inside the main body case, and the hand drying chamber has a negative pressure. A hand dryer that suppresses leakage of contaminated air, characterized by being held. 2. An air outlet for sucking and purifying air inside the hand drying chamber without passing through an air flow path to an air blowing nozzle and air filtering means, purifying the air, and sending it to the inside of the hand insertion port. 2. The hand dryer according to claim 1, further comprising an air filtering means and a small air blowing means.