JP4293271B2 - Hand dryer - Google Patents

Description

  The present invention relates to a hand drying device that dries a wet hand after washing a hand in a washroom or a toilet.

  As an apparatus for drying wet hands after washing, a hand drying apparatus that blows and dries water droplets adhering to the hands by a high-speed air flow is known (for example, see Patent Document 1).

  Hereinafter, the hand dryer will be described with reference to FIG.

The main body case 101 forms an exterior by a front case 101A that covers the front surface, the top surface, and both side surfaces, and a rear case 101B that covers the wall surface side. Inside the main body case 101, there are provided a blower means 102, a blowout nozzle 103 that communicates with the blower means 102 and blows out blown air, and a control means 104 that controls electrical components. The blowing means 102 includes a blower motor 102A that generates blown air and a blowing case 102B. A heat generation means 105 is provided in the air passage in the blowout nozzle 103 to make the blown air warm. On the lower surface of the main body case 101, there are provided a blower outlet of the blowout nozzle 103, a suction port 106 that takes in the blown air into the main body case 101, and a filter 107 that removes dust from the blown air sucked from the suction port 106. Yes.
Japanese Patent No. 3970762 (paragraph 0007, FIG. 1)

  In such a conventional hand dryer, air sucked from the suction port 106 of the main body case 101 composed of the rear case 101B and the front case 101A is sucked at high speed into the suction port of the blower motor 102A provided in the main body case 101. However, since this air flows through the space formed by the rear case 101B and the front case 101A, there is a problem that ventilation noise and noise from the blower motor 102A leak to the outside. . And in order to attenuate the noise which leaks outside, when the sound-absorbing material was affixed widely, there existed a subject that manufacturing cost raised.

  The present invention solves such a conventional problem, and an object of the present invention is to provide a hand-drying apparatus with low noise without increasing the manufacturing cost.

In order to achieve the above object , the hand drying device of the present invention has a nozzle part that blows out air that dries wet hands to a body case composed of a rear case and a front case, and a fan motor that sends air to the nozzle part And a hand dryer that heats the air sent from the fan motor and an air inlet to the fan motor, wherein the fan motor is fixed to the rear case. The support case is supported with its suction port opposed to each other, and is surrounded by a fan motor front case and the fan motor support case, and the fan motor suction port is interposed between the rear case and the fan motor support case. A hand drying device characterized in that an air intake air passage communicating with the air intake on the main body case side is formed, The intake air passage leading to the suction port of the fan motor from the intake port of the serial body case side, in which an arc shape along the outer circumferential wall of the fan motor support case.

  In another means, an opening opened outside the intake air passage is provided in a part of the intake air passage.

According to the present invention, a nozzle part that blows out air for drying wet hands to a main body case including a rear case and a front case, a fan motor that sends out air to the nozzle part, and air that is sent out from the fan motor A hand-drying device comprising a heating means for heating the fan motor and an air inlet to the fan motor, wherein the fan motor is opposed to a fan motor support case fixed to the rear case. The fan motor front case and the fan motor support case are enclosed, and the fan motor suction port and the main body case side intake port communicate with each other between the rear case and the fan motor support case. to the formation of the intake air passage a hand dryer according to claim to, from the intake port of the main body case side The intake air passage leading to the suction port of the serial fan motor, by which an arc shape along the outer circumferential wall of the fan motor support case, with low noise by reducing the noise transmission to improve the indoor air blowing performance, and , protected electrical component to improve the quality, with eliminated incurring an increase in manufacturing cost, the length of the intake air passage Ki out that the longest distance in the fan motor support case, a smooth intake flow Since it flows, the propagation of noise into the room can be further attenuated.

  In addition, by providing an opening opened outside the intake air passage in a part of the intake air passage, even if water droplets are mixed in the intake air flow, it is not sucked into the fan motor. The drying efficiency of the hand can be improved.

Hand drying apparatus according to claim 1 of the present invention, the main body case consisting of a rear case and a front case, a nozzle portion for blowing air for drying wet hands, a fan motor for sending air to said nozzle portion, said A hand dryer having a heating means for heating air sent from a fan motor and an air inlet to the fan motor, wherein the fan motor is mounted on a fan motor support case fixed to the rear case. The suction port is supported so as to face each other, and is surrounded by a fan motor front case and the fan motor support case, and the fan motor suction port and the main body case are interposed between the rear case and the fan motor support case. a hand drying apparatus characterized by forming the intake air passage for communicating the side of the intake port, the main body cable The intake air passage from the intake port side to the suction port of the fan motor, wherein is obtained by a fan motor support case an arc shape along the outer wall of which is sucked from the suction port of the main body case side intake Since the air flows in the air intake air passage that connects the air inlet and the fan motor air inlet, the air flow smoothly improves and the air flow improves without touching the electrical components such as the printed circuit board. Furthermore, since the fan motor is surrounded by the fan motor support case and the fan motor front case, the noise transmitted to the room is reduced, and the distance from the fan motor inlet to the inlet becomes longer. Even if the intake air passage becomes long, it has an arc shape, so that the intake air flow has an effect of flowing smoothly.

According to a second aspect of the present invention, there is provided a hand drying device in which an opening opened outside the intake air passage is provided in a part of the intake air passage, and the air velocity of the intake air flowing at high speed in the intake air passage is It is lowered slightly by the opening that opens to the outside of the air passage, and even if water droplets are mixed in the intake flow, they are dropped before being sucked from the fan motor inlet.

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

(Embodiment 1)
1-4, the rear case 1A and the front case 1B are fitted together to form the main body case 1, and the nozzle portion 2 that blows out air for drying wet hands on the lower surface of the main body case 1; A fan motor 3 for sending air to the nozzle unit 2, heating means 4 for heating the air sent from the fan motor 3, and an air inlet 5 for the air to the fan motor 3 are provided.

  In the main body case 1, a fan motor support case 6 is fixed to the rear case 1A, and the fan motor 3 is supported on the fan motor support case 6 with its suction port 3A facing the rear case 1A. A fan motor front case 7 is abutted against the fan motor support case 6 to surround the fan motor 3.

  An intake air passage 8 is formed in an independent space between the rear case 1A and the fan motor support case 6 so as to communicate from the suction port 3A of the fan motor to the intake port 5 provided on the lower surface of the main body case 1. .

  Here, the intake port 5 is formed integrally with the lower end portion of the fan motor support case 6 so as to face downward from the main body case 1. As shown in FIG. 3, the intake air passage 8 is formed in an arc shape along the outer peripheral wall 9 of the fan motor support case 6 so that the intake air flows in the same direction as the direction in which the fan motor 3 rotates. . That is, the intake air passage 8 is formed so as to be as long and smooth as possible in the fan motor support case 6.

  Further, as shown in FIG. 4, an opening 10 opened outside the intake air passage 8 is provided in a part of the outer peripheral wall 9 of the fan motor support case 6 formed by the intake air passage.

  Next, the operation of the hand dryer having the above configuration will be described.

  When the user inserts the wet hand under the nozzle unit 2 in order to dry it, a detection unit (not shown) detects the hand and energizes the fan motor 3 and the heating means 4, and hot air flows from the nozzle unit 2 at high speed. Be blown out. At this time, the intake air flow to the fan motor 3 is sucked from the intake port 5 provided facing the space below the main body case 1, which is a space for blowing air from the nozzle portion 2, and is thus blown out from the nozzle portion 2. A circulation flow is formed in which warm air is sucked and blown out from the nozzle portion 2, and the temperature rise characteristic of the warm air for drying the hand is improved. The intake air flow from the intake port 5 flows through an arcuate intake air passage 8 formed between the rear case 1A and the fan motor support case 6, and is sucked into the intake port 3A of the fan motor 3. Since the intake air passage 8 has an arc shape and is formed to have a long passage length, even if water drops are mixed in the intake air flow, it adheres to the outer peripheral wall 9 of the intake air passage 8 and the like in the process of flowing. Since water droplets do not reach the suction port 3A of the motor 3 and the inside is an independent ventilation path, dust mixed in the intake air flow in the electrical component 10 such as a printed circuit board provided in the main body case 1 Will not touch and quality will improve. Further, since the intake air passage 8 is formed in an arc shape even if it has a long passage length and flows in the same direction as the rotation direction of the fan motor 3, air in the intake air passage 8 is formed. Disturbance can be minimized, air blowing performance can be improved, and noise can be reduced.

  Further, even when the air velocity of the intake air flow flowing at high speed in the intake air passage 8 is slightly reduced by the opening 10 opened to the outside of the intake air passage 8, water drops are mixed in the intake air flow or water is intentionally injected by mischief. Due to the balance between the flow velocity in the air passage and gravity, water drops are dropped before being sucked from the suction port 3A of the fan motor 3.

  Thus, according to the hand dryer of Embodiment 1 of the present invention, the intake air passage 8 to the fan motor 3 is formed between the rear case 1A and the fan motor support case 6, and the fan motor 3 is supported by the fan motor. By enclosing the case 6 and the fan motor front case 7, it is possible to suppress the fan motor noise and ventilation sound from being propagated into the room, and the intake air passage 8 is formed in a long arc shape. By providing the opening 10 opened to the outside of the flow path in the part, the air blowing performance is improved to reduce noise, and the quality of the nozzle part 2 is improved by preventing the intrusion of water droplets and dust mixed in the intake air flow. By providing the intake port 5 at a position for intake from the space where the hot air is blown out, the temperature rise characteristic of the hot air is improved, and the intake port 5 is further connected to the fan motor support case 6. By integrally formed, the number of parts can be reduced and assembly steps, it is possible to suppress an increase in manufacturing cost.

  As described above, a low-noise hand dryer can be provided without using dedicated materials and parts for noise reduction without causing an increase in manufacturing cost, and further, quality improvement or temperature characteristics can be provided. It is possible to reduce noise while ensuring the efficiency of hand drying by improving the efficiency.

  In the first embodiment, the intake port 5 is formed integrally with the fan motor support case 6, but may be formed integrally with the rear case 1A.

( Reference Example 1 )
As shown in FIG. 5, the reference example 1 is different from the first embodiment in that the intake port 5 </ b> A is provided at a position where air is sucked from below the water receiving portion 11 provided below the main body case 1. .

  In FIG. 4, the same constituent elements as those in FIGS.

  Below the main body case 1, an air inlet 5 </ b> A is provided in the lower rear portion of the water receiving portion 11 that receives water droplets blown from the hands wet by the air blown from the nozzle portion 2.

  With the above configuration, dry air is sucked from the air inlet 5A, so that air mixed with water droplets does not flow in the main body case 1, and water droplets do not adhere to the electrical component 10 such as the printed circuit board. Since the intake port 5A is located far from the position of the ear of the person at the lower part of the receiving part 11, noise can be suppressed in combination with the intake air passage 8 becoming longer.

Thus, according to the hand dryer of Reference Example 1 of the present invention, it is possible to reduce noise while ensuring quality.

( Reference Example 2 )
As shown in FIG. 6, the reference example 2 is provided with a shielding plate 12 that is orthogonal to the flow of the intake air flow at the intake port 5 with respect to the first embodiment or the reference example 1 , and on the end side of the shielding plate 12. It is characterized in that a flow path is formed.

  With the above configuration, noise that propagates from the inside of the main body case 1 through the air inlet 5 into the room is attenuated by the shielding plate 12, and when water droplets are mixed in the intake air flow, the water droplets adhere to the shielding plate 12. Intrusion into the main body case 1 is prevented.

  Further, by providing the slits 13 at short intervals in parallel with the same direction as the intake air flow, not only can the flow be rectified and smoothed, but also the danger of a person putting a finger or the like can be prevented.

As described above, according to the hand drying device of Reference Example 2 of the present invention, noise can be further reduced, and the function of preventing water droplets from entering the main body case 1 can be enhanced to improve the quality.

  The hand dryer of the present invention is installed in a washroom or a toilet such as a restaurant or a hotel, and is also applied in a hospital, an operating room, or a kitchen.

1 is a side configuration diagram showing a hand dryer according to Embodiment 1 of the present invention. An exploded perspective view of the main part of the hand dryer Vertical configuration diagram of the case of the hand dryer Perspective view of the main part of the hand dryer Side configuration diagram showing a hand dryer of Reference Example 1 of the present invention The vertical block diagram of the main body case of the hand dryer of the reference example 2 of this invention Side view showing a conventional hand dryer

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main body case 1A Rear case 1B Front case 2 Nozzle part 3 Fan motor 3A Intake port 4 Heating means 5 Intake port 6 Fan motor support case 7 Fan motor front case 8 Intake air path 9 Outer wall 10 Opening 11 Water receiving part 12 Shielding plate

Claims (2)

A nozzle part that blows out air that dries wet hands to a main body case including a rear case and a front case, a fan motor that sends air to the nozzle part, and heating means that heats the air sent from the fan motor; A hand dryer having an air inlet to the fan motor, wherein the fan motor is supported by a fan motor support case fixed to the rear case with its inlet facing the fan motor. Surrounded by a motor front case and the fan motor support case, an intake air passage is formed between the rear case and the fan motor support case to communicate the fan motor inlet and the main body case inlet. a hand drying apparatus characterized by the, the fan motor from the air inlet of the main body case side Hand drying apparatus of the intake air passage leading to the suction port, characterized in that an arc shape along the outer circumferential wall of the fan motor support case. Hand drying apparatus according to claim 1 having an opening which is open to the outside of the intake air passage to a part of the intake air passage.

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