Hand drying device

Abstract

The present invention provides a hand drying device that reduces the possibility that the air coming out of the blow-out port leaks out from an opening for inserting a hand instead of from an inlet. The flow path portion comprises: an inlet flow path connected to the inlet port, into which the air inhaled from the inlet port flows; a circulation flow path connected to the inlet flow path and a first blow-out port, and which sends the air flowing in from the inlet flow path to the first blow-out port; and an exhaust flow path connected to the inlet flow path and an exhaust port formed outside a drying space, and which generates negative pressure in the drying space by sending a portion of the air flowing in from the inlet flow path to the exhaust port.

Description

Technical Field

[0001] An embodiment of the present invention relates to a hand drying device. Background Art

[0002] There is known a hand drying device that can eject air sucked in through an intake port toward a user's hands through an exhaust port.

[0003] In such a general hand drying device, when bacteria, viruses, etc. are attached to the user's hands, the bacteria and viruses may be discharged outside the hand drying device due to the air hitting the user's hands from the blow-out port. In order to prevent such a problem, the applicant has considered the following hand drying device: by providing a suction port in a drying space provided with a blow-out port, the air blown out from the blow-out port is sucked into the suction port provided in the drying space. Such a hand drying device is known, for example, the hand drying device disclosed in Japanese Patent Gazette No. 2001-299636. However, in such a hand drying device, there is a possibility that the air coming out of the blow-out port is not fully sucked into the suction port in the drying space, and leaks out from the opening for inserting the hand. Summary of the invention

[0004] Problems to be solved by the invention

[0005] One aspect of the present invention has been made based on the knowledge of this problem, and an object of the present invention is to provide a hand drying device that reduces the possibility that the air discharged from the blow-out port leaks out from the opening for inserting hands instead of the inlet.

[0006] Technical solutions to solve problems

[0007] A hand drying device according to one form of an embodiment of the present invention comprises: a wall portion, which has a first wall portion and a second wall portion, the first wall portion is formed with a first blow-out port, the second wall portion is arranged opposite to the first wall portion, and a drying space is formed between the second wall portion and the first wall portion, the drying space having an opening for placing wet hands; a bottom portion, which is connected to the first wall portion and the second wall portion and forms the bottom of the drying space; an air supply portion, which is used to suck air into the drying space from an inlet formed in the wall portion or the bottom portion, and spray the air from the first blow-out port into the drying space; and a flow path portion , which is provided with the air supply part for the flow of air sucked from the suction port; and the filter part, which is arranged in the flow path part, and the flow path part has: an intake flow path, which is connected with the suction port, for the flow of air sucked from the suction port; a circulation flow path, which is connected with the suction flow path and the first blow-out port, and sends the air flowing in from the suction flow path to the first blow-out port; and an exhaust flow path, which is connected with the suction flow path and the exhaust port formed outside the drying space, and generates negative pressure in the drying space by sending a part of the air flowing in from the suction flow path to the exhaust port.

[0008] A hand drying device according to one form of an embodiment of the present invention comprises: a frame having an inner surface and an opening, wherein the opening is used for a user to insert a hand into a drying space surrounded by the inner surface; an intake port, which is arranged on the inner surface and sucks in air in the drying space; a blow-out port, which is arranged on the inner surface and blows out air into the drying space; a flow path portion, which connects the intake port and the blow-out port; an air supply portion, which is arranged on the flow path portion, so that the intake port inhales air and at least a portion of the air inhaled by the intake port is blown out from the blow-out port via the flow path portion; and an exhaust port, which discharges a portion of the air inhaled from the intake port from the flow path portion.

[0009] A hand drying device involved in one form of an embodiment of the present invention comprises: a frame, which has an inner surface and an opening, wherein the opening is used for a user to insert a hand into a drying space surrounded by the inner surface; a first suction port and a second suction port, which are arranged on the inner surface and suck air in the drying space; a blow outlet, which is arranged on the inner surface and blows air into the drying space; an exhaust port, which exhausts the air sucked in from the second suction port; a first flow path portion, which connects the first suction port with the blow outlet; a second flow path portion, which connects the second suction port with the exhaust port; and a first air supply portion, which is used to allow the first suction port to suck air, and the second flow path portion is a flow path different from the first flow path portion.

[0010] A hand drying device according to one form of an embodiment of the present invention comprises: a frame having an inner surface and an opening for a user to insert a hand into a drying space surrounded by the inner surface; an intake port for sucking in air in the drying space; an exhaust port for exhausting the air sucked in from the intake port; a blow-out port provided on the inner surface for blowing air into the drying space; an external air intake port for sucking in air from outside the drying space; a first flow path portion connecting the intake port with the exhaust port; a second flow path portion connecting the blow-out port with the external air intake port; a first air supply portion for causing the intake port to suck in air; and a second air supply portion for causing the external air intake port to suck in air, the first air supply portion and the second air supply portion being operated so that the volume of air sucked in from the intake port is greater than the volume of air blown out from the blow-out port.

[0011] Effects of the Invention

[0012] According to one aspect of the embodiment of the present invention, it is possible to provide a hand drying device in which the possibility that the air discharged from the blow-out port leaks out from the opening for inserting hands instead of the suction port is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic perspective view showing a hand drying device according to an embodiment of the present invention;

[0014] Figure 2 Yes means Figure 1 A schematic perspective view of a hand drying device;

[0015] Figure 3 Yes means Figure 1 A schematic cutaway perspective view of a portion of a hand drying device;

[0016] Figure 4 Yes means Figure 1 A schematic cross-sectional view of the air flow of a hand drying device;

[0017] Figure 5 Yes means Figure 1 A schematic block diagram of the air flow of a hand drying device;

[0018] FIG6 (a) is a schematic perspective view of another hand drying device according to the embodiment as viewed from the front;

[0019] FIG6 (b) is a schematic perspective view of another hand drying device according to the embodiment when viewed from behind;

[0020] Figure 7 6 (a) is a schematic cross-sectional view showing a cross section of the hand drying device taken along line AA;

[0021] Figure 8 6 (a) is a schematic cross-sectional view showing a cross section of the hand drying device taken along line BB;

[0022] Fig. 9 is a schematic diagram showing the air flow of the hand drying device of FIG. 6( a );

[0023] Fig.10 This is a schematic perspective view showing a part of the hand drying device of FIG. 6( a ).

[0024] Figure 11(a) shows Fig.10 A schematic cross-sectional view of a section of a portion of the hand drying device shown along line CC;

[0025] Figure 11(b) shows Fig.10 A schematic cross-sectional view of a section of a portion of the hand drying device shown along line DD;

[0026] Fig.12 is a schematic perspective view showing a portion of the hand drying device of FIG. 6 (a);

[0027] Fig.13 is a schematic exploded view showing the hand drying device of FIG. 6( a );

[0028] Fig.14 Schematic diagram showing air flow of another hand drying device according to an embodiment Figure 1 ;

[0029] Fig.15 Schematic diagram showing air flow of another hand drying device according to an embodiment Figure 2 ;

[0030] Fig.16 Schematic diagram showing air flow of another hand drying device according to an embodiment Figure 3 . DETAILED DESCRIPTION

[0031] Below, while referring to the attached Figure 1 It should be noted that in each of the drawings, the same components are given the same reference numerals and detailed descriptions thereof are appropriately omitted.

[0032] Figure 1 : is a schematic perspective view showing a hand drying device according to an embodiment of the present invention. Figure 2 Yes means Figure 1 A schematic perspective view of a hand drying device. Figure 3 Yes means Figure 1 A schematic cutaway perspective view of a portion of a hand drying device.

[0033] like Figure 1 as well as Figure 2 As shown, the hand drying device 100 comprises: a wall portion 6, which has a first wall portion 2 and a second wall portion 4 (not shown), the first wall portion 2 is formed with a plurality of first blow-out ports 2a, the second wall portion 4 is arranged opposite to the first wall portion and is formed with a plurality of second blow-out ports 4a (not shown); and a bottom portion 8, which is connected to the first wall portion 2 and the second wall portion 4 and forms the bottom of the drying space D. The second wall portion 4 forms a drying space D between the first wall portion 2 and the second wall portion 4, and the drying space D has an opening at the top for placing wet hands.

[0034] The hand drying device 100 includes: an air supply unit 12, which is used to suck air from the drying space D from the suction port 10 formed at the bottom 8 and spray the air into the drying space D from the first blowing port 2a; a flow path unit 14, which is provided with the air supply unit 12 for the air sucked from the suction port 10 to flow; and a filter unit 16, which is provided in the flow path unit 14.

[0035] The flow path portion 14 includes: an intake flow path 18 connected to the intake port 10 for inflow of air inhaled from the intake port 10; a circulation flow path 20 connected to the intake flow path 18 and the first blow-out port 2a for sending the air inflowing from the intake flow path 18 to the first blow-out port 2a; and an exhaust flow path 24 connected to the intake flow path 18 and an exhaust port 22 formed outside the drying space D for generating negative pressure in the drying space D by sending part of the air inflowing from the intake flow path 18 to the exhaust port 22. The intake flow path 18 is longer than the circulation flow path 20 and longer than the exhaust flow path 24. In addition, the circulation flow path 20 is longer than the exhaust flow path 24. The exhaust port 22 is formed on the lower surface of the hand drying device 100.

[0036] The air supply unit 12 includes a first air supply unit 26, which is an air supply fan provided in the suction flow path 18, and a second air supply unit 28, which is an air supply fan provided in the circulation flow path 20 on the upstream side of the exhaust flow path. In this way, by providing the first air supply unit 26 in the suction flow path 18 and providing the second air supply unit 28 in the circulation flow path 20 on the upstream side of the exhaust flow path 24, it is possible to make a part of the air flow to the exhaust flow path 24 to ensure the minimum negative pressure in the drying space D, and at the same time, make it easy for most of the air sucked from the suction port 10 to flow into the circulation flow path 20.

[0037] The suction flow path 18 has a water receiving portion 30 for collecting water droplets attached to the user's hands. The water receiving portion 30 is formed on a water receiving tray 32 that can be freely loaded and unloaded relative to the hand drying device body. The filter portion 16 has a first filter portion 34, a second filter portion 36, and a third filter portion 38. The first filter portion 34 is arranged on the suction flow path 18 on the upstream side of the discharge flow path 24 and on the downstream side of the water receiving portion 30. By arranging the first filter portion 34 in the suction flow path 18, dust and the like can be efficiently captured before the air from the suction port 10 flows into the circulation flow path 20 and the discharge flow path 24. On this basis, by arranging the first filter portion 34 on the downstream side of the water receiving portion 30, it is possible to suppress the situation in which the mesh of the first filter portion 34 is blocked by water droplets and the like. The second filter portion 36 is a HEPA filter (High Efficiency Particulate Air Filter) that can capture bacteria and the like, and is formed in the discharge flow path 24. The third filter portion 38 is a HEPA filter capable of capturing bacteria and the like, and is formed in the circulation flow path 20 .

[0038] The circulation flow path 20 is configured such that the flow path cross-sectional area is larger than the flow path cross-sectional area of ​​the exhaust flow path 24. That is, the magnitude of the pressure loss of the fluid flowing in the circulation flow path 20 is configured to be smaller than the magnitude of the pressure loss of the fluid flowing in the exhaust flow path 24. Thus, by allowing a portion of the air to flow to the exhaust flow path 24, it is possible to ensure the required minimum negative pressure in the drying space D while allowing most of the air sucked in from the suction port 10 to easily flow into the circulation flow path 20.

[0039] The flow path portion 14 has an intake flow path 46, which is connected to an intake port 44 for taking in air from the outside and the circulation flow path 20. The air taken in from the intake port 44 flows into the circulation flow path 20, and is blown out from the first blow-out port 2a and the second blow-out port 4a into the drying space D. Thus, while a part of the air can flow to the exhaust flow path 24, thereby ensuring the required minimum negative pressure in the drying space D, the amount of air blown out from the first blow-out port 2a and the second blow-out port 4a can be ensured, so that the user's hands can be fully dried. The intake port 44 is formed on the lower surface of the hand drying device and is arranged side by side with the exhaust port 22.

[0040] The hand drying device 100 includes a detection unit 40, which is a sensor provided on the first wall portion 2. In addition, the hand drying device 100 includes a control unit 42 (see Figure 3 , Figure 4 ), the control unit 42 executes control to drive the first air supply unit 26 and the second air supply unit 28 based on the signal from the detection unit 40.

[0041] Figure 4 Yes means Figure 1 A schematic cross-sectional view of the air flow of a hand drying device. Figure 5 Yes means Figure 1 Schematic diagram of the air flow of a hand drying device. It should be noted that Figure 4 as well as Figure 5 The arrows shown in the figure indicate the flow of air.

[0042] If the user inserts a wet hand into the drying space D from the opening, the detection unit 40 provided on the first wall portion 2 detects the hand. If the detection unit 40 detects the hand, a signal is sent from the detection unit 40 to the control unit 42. If the control unit 42 receives the signal, it executes control to drive the first air supply unit 26. Thereafter, after a predetermined time has passed since the start of the drive of the first air supply unit 26, control to drive the second air supply unit 28 is executed. That is, if the detection unit 40 detects the hand, the first air supply unit 26 is driven, and then the second air supply unit 28 is driven later. Thus, after the drying space D becomes negative pressure by driving the first air supply unit 26, the drying action of the hand starts by driving the second air supply unit 28, so that the air in the drying space D can be blown out from the first outlet 2a and the second outlet 4a by driving the second air supply unit 28 while fully suppressing the air in the drying space D from leaking out of the opening.

[0043] It should be noted that if the wet hand is moved out of the drying space D from the opening, the detection unit 40 cannot detect the hand. At this time, the control unit 42 executes the control to stop the drive of the second air supply unit 28. Thereafter, after a prescribed time has passed since the drive of the second air supply unit 28 was stopped, the control to stop the drive of the first air supply unit 26 is executed. That is, if the detection unit 40 cannot detect the hand, the drive of the first air supply unit 26 is stopped later after the drive of the second air supply unit 28 is stopped. Thus, in a state where the drying space D becomes negative pressure by the drive of the first air supply unit 26, the drive of the second air supply unit 28 is stopped before the drive of the first air supply unit 26, thereby being able to fully suppress the air in the drying space D from leaking out of the opening.

[0044] During the period when the second air supply unit 28 is driven, the first air supply unit 26 is driven. That is, during the period when the second air supply unit 28 is driven, the control unit 42 performs control to drive the first air supply unit 26. Thus, during the period when the second air supply unit 28 is driven, the drying space D is negatively pressurized by the driving of the first air supply unit 26, so that the air in the drying space D can be sufficiently suppressed from leaking out of the opening.

[0045] When the first air supply unit 26 is driven, the air in the drying space D is sucked into the inside of the hand drying device body, that is, the suction flow path 18. As a result, the drying space D is in a negative pressure state, and the air in the drying space D can be prevented from leaking out of the opening. The air sucked into the suction flow path 18 collides with the water receiving portion 30.

[0046] The air sucked into the suction flow path 18 collides with the water receiving portion 30. Thus, the moisture adhering to the user's hands can be collected and accumulated in the air containing the moisture. The accumulated water can be discharged by the user pulling out the water receiving tray 32 from the hand dryer body.

[0047] The air that collides with the water receiving portion 30 is sent to the first air supply portion 26 after passing through the first filter portion 34. The dust and the like contained in the air can be removed by the first filter portion 34. The air that has passed through the first air supply portion 26 is diverted along the circulation flow path 20 or the exhaust flow path 24 after passing through the second filter portion 36. At this time, the circulation flow path 20 is configured so that the flow path cross-sectional area is larger than the flow path cross-sectional area of ​​the exhaust flow path 24, so that a part of the air can flow to the exhaust flow path 24 to ensure the minimum negative pressure required in the drying space D, while allowing most of the air sucked in from the suction port 10 to flow into the circulation flow path 20.

[0048] The air flowing into the exhaust flow path 24 is exhausted from the exhaust port 22. The air exhausted from the exhaust port 22 is converted into clean air by passing through the second filter unit 36 ​​which is a HEPA filter.

[0049] The air flowing into the circulation flow path 20 merges with the air flowing in from the intake flow path 46. The air merged with the air flowing in from the intake flow path 46 flows through the third filter 38 and is sent to the second air supply unit 28. The air flowing through the second air supply unit 28 is blown out from the first outlet 2a and the second outlet 4a into the drying space D. The air blown out from the first outlet 2a and the second outlet 4a into the drying space D is sucked into the inside of the hand drying device body, that is, the suction flow path 18 again due to the driving of the first air supply unit 26.

[0050] In addition, for example, when the first air supply unit 26 and the second air supply unit 28 are driven, the first air supply unit 26 and the second air supply unit 28 are operated so that the air volume sucked from the suction port 10 is greater than the air volume blown out from the blow-out port. Thus, the air in the drying space D can be further suppressed from leaking out from the opening for hand insertion. It should be noted that the above-mentioned driving time may be at least a part of the time when the first air supply unit and the second air supply unit are being driven, except for the transition state such as just after the driving starts. In addition, as described above, the blow-out port for ejecting air into the drying space may be a plurality of openings (in this example, a plurality of first blow-out ports 2a and a plurality of second blow-out ports 4a). In this case, the "air volume of air blown out from the blow-out port" may be the sum of the air volumes of each of the plurality of openings. That is, the "blow-out port" of the "air volume of air blown out from the blow-out port" may be a plurality of openings (for example, all openings) including the first blow-out port, and blowing the air sucked from the drying space into the drying space. More specifically, “the volume of air blown out from the air outlet” is, for example, the total volume of air blown out from all the first air outlets and the second air outlets.

[0051] In addition, in this example, the suction port is one opening. However, the suction port for sucking the air in the drying space may be multiple openings. In this case, the "air volume of air sucked from the suction port" may be the sum of the air volumes of each of the multiple openings. That is, the "suction port" of the "air volume of air sucked from the suction port" may be multiple openings (for example, all openings) for sucking the air in the drying space.

[0052] In addition, for example, Figure 5 In the case of, the air volume of the second air supply unit 28 can be used as the "air volume of air blown out from the blow-out port". Figure 5 In this case, the air volume of the first air supply unit 26 can be used as the “air volume of air sucked from the air inlet”. It should be noted that the air volume of the air supply unit is, for example, the air volume of the opening of the air supply unit that serves as an air inlet or outlet.

[0053] When the first air supply unit 26 and the second air supply unit 28 are driven, the first air supply unit 26 and the second air supply unit 28 are operated in a manner that the output of the first air supply unit 26 is greater than the output of the second air supply unit 28. It should be noted that the output of the air supply unit (for example, the first air supply unit 26 or the second air supply unit 28) corresponds to the output (power consumption (watt)) of the motor that drives the air supply fan included in the air supply unit. That is, the control unit 42 performs control to make the output of the motor of the air supply fan of the first air supply unit 26 greater than the output of the motor of the air supply fan of the second air supply unit 28.

[0054] Thus, the first air supply unit 26 operates with a greater output than the second air supply unit 28, so that the air volume sucked from the suction port 10 can be greater than the air volume blown out from the blow-out port. Thus, the air in the drying space D can be further prevented from leaking from the opening for hand insertion.

[0055] However, the air volume of the air supply unit may be controlled by the structure of the air supply fan, etc., rather than being limited to the output of the motor. For example, the air volume may be appropriately adjusted according to the position, number, shape, size, etc. of the blades of the air supply fan. The air supply fan may have any structure that generates wind through the movement of blades, such as a propeller fan, a sirocco fan, or a turbo fan.

[0056] For example, when the first air supply unit 26 and the second air supply unit 28 are driven, the volume of air blown out from the blow-out port may be larger than the volume of air discharged from the discharge port 22. Since more air is blown out from the blow-out port, the drying performance can be maintained.

[0057] It should be noted that, in this example, the exhaust port is one opening. However, the exhaust port for exhausting the air in the flow path portion to the outside may also be a plurality of openings. In this case, the "air volume of air exhausted from the exhaust port" may be the sum of the air volumes of each of the plurality of openings. That is, the "exhaust port" of the "air volume of air exhausted from the exhaust port" may be a plurality of openings (for example, all openings) for exhausting the air in the flow path portion to the outside.

[0058] When measuring the air volume of the air supply unit during a certain driving, the air supply unit to be measured is driven with the same output as the output during the driving, and the driving of the air supply units other than the air supply unit is stopped, and the air volume flowing in the air supply unit to be measured is measured using an air volume measuring device. The air volume measuring device can be a device (PQ device, etc.) that can measure the air volume-static pressure characteristic (PQ characteristic) of the fan.

[0059] Specifically, for example, the second air supply unit 28 is stopped, and the first air supply unit 26 is driven with the same output as when the first air supply unit 26 and the second air supply unit 28 are driven. In this state, the air volume measuring device is used to measure the air volume of the air flowing in the first air supply unit 26. The measurement result can be used as the "air volume of air sucked in from the suction port". And, for example, the first air supply unit 26 is stopped, and the second air supply unit 28 is driven with the same output as when the first air supply unit 26 and the second air supply unit 28 are driven. In this state, the air volume measuring device is used to measure the air volume of the air flowing in the second air supply unit 28. The measurement result can be used as the "air volume of air blown out from the blowing port".

[0060] Alternatively, when measuring the air volume at a certain opening, measure the wind speed (m / s) at the opening and the area (m 2 ). The wind volume can be calculated from the product of wind speed and area. The wind speed can be measured using an anemometer that converts pressure difference into wind speed (e.g., a Pitot tube type) or a hot wire anemometer. The wind speed is measured by setting a detection part (e.g., a probe, etc.) of the anemometer approximately in the center of the opening or on the upstream or downstream side thereof.

[0061] Specifically, for example, when the first air supply unit 26 and the second air supply unit 28 are driven, a detection unit of an anemometer is provided at the air inlet 10 to measure the wind speed. The air volume of the air inlet 10 can be measured based on the product of the wind speed and the area of ​​the air inlet 10. The measurement result can be used as the "air volume of air inhaled from the air inlet". Moreover, for example, when the first air supply unit 26 and the second air supply unit 28 are driven, a detection unit of an anemometer is provided at one outlet (the first outlet 2a or the second outlet 4a) to measure the wind speed. The air volume of the one outlet can be measured based on the product of the wind speed and the area of ​​the one outlet. The sum of the air volumes of the outlets measured in this way can be used as the "air volume of air blown out from the outlet".

[0062] Above, such as Figure 1 to Figure 5 As shown, the hand drying device 100 according to the embodiment has a frame having an inner surface (e.g., a first wall portion 2, a second wall portion 4, and a bottom portion 8) and an opening for a user to insert his hand into a drying space D surrounded by the inner surface. Furthermore, the hand drying device 100 includes an inlet 10, an outlet (e.g., at least one of the first outlet 2a and the second outlet 4a), a flow path portion 14, an air supply portion 12, and an exhaust port 22. The inlet 10 is provided on the inner surface to inhale the air in the drying space D. The outlet is provided on the inner surface to blow air into the drying space D. The inlet 10 is connected to the outlet by the flow path portion 14. The air supply portion 12 is provided on the flow path portion 14 to inhale the air by the inlet 10 and blow at least a portion of the air inhaled by the inlet 10 out of the outlet via the flow path portion 14. The exhaust port 22 discharges a portion of the air inhaled from the inlet 10 from the flow path portion 14. Thus, as described above, it is possible to prevent the air in the drying space from leaking out of the opening during the drying of the hands. By providing the exhaust port, it is possible to further prevent the air in the drying space from leaking out of the opening, thereby improving the ease of use.

[0063] In addition, the filter unit 16 (for example, the first filter unit 34 and the second filter unit 36) is located upstream of the exhaust port 22 on the air flow path 14 from the inlet 10 to the outlet. By locating the filter unit 16 upstream of the exhaust port 22, the air discharged from the exhaust port 22 can be cleaned.

[0064] It should be noted that the upstream on the flow path portion refers to the side of the flow path portion that is closer to the suction port along the flow direction of the air. For example, the direction from the upstream to the downstream on the flow path portion is the direction from the suction port to the blow-out port along the direction of the air flow. In addition, the connection can be either a direct connection or an indirect connection.

[0065] FIG. 6( a ) and FIG. 6( b ) are schematic perspective views illustrating another hand dryer according to the embodiment of the present invention.

[0066] FIG. 6( a ) is a perspective view of the hand drying device 200 according to the present embodiment when viewed from the front, and FIG. 6( b ) is a perspective view of the hand drying device 200 when viewed from the rear. It should be noted that in the description of the present embodiment, the near front side of the hand drying device 200 is set as the “front”, and the back side is set as the “rear”. The user who uses the hand drying device 200 inserts wet hands into the drying space SP, for example, while standing in front of the hand drying device 200 facing the rear.

[0067] “Above,” “below,” “right,” and “left,” respectively, are directions when viewed from a user standing facing forward.

[0068] As shown in Fig. 6(a) and Fig. 6(b), the hand drying device 200 has a frame 50 (housing). The frame 50 has an inner surface 50i facing inward and an opening 50A for a user to insert his / her hands into a drying space SP surrounded by the inner surface 50i. The opening 50A faces upward.

[0069] For example, the frame 50 is a substantially rectangular parallelepiped having an opening 50A at the top and being long in the vertical direction. The outer surface 50 j of the frame 50 is formed by a front surface 91 , a rear surface 92 , a right side surface 93 , a left side surface 94 , and a bottom surface 95 .

[0070] The hand drying device 200 has a blow-out port (a first blow-out port 61 and a second blow-out port 62) provided on the inner surface 50i. The blow-out port (the first blow-out port 61 and the second blow-out port 62) blows air into the drying space SP. The user places his hands in the air (wind) blown out from the blow-out port, thereby drying his wet hands.

[0071] Figure 7 as well as Figure 8 This is a schematic cross-sectional view showing the hand drying device of FIG6(a).

[0072] Figure 7 6(a) shows a cross section taken along line AA, Figure 8 A cross section taken along line BB shown in FIG. 6( a ) is shown.

[0073] like Figure 8As shown, the inner surface 50i of the frame 50 has a first surface 51 (e.g., a first wall portion), a second surface 52 (e.g., a second wall portion), and a bottom surface 55 (e.g., a bottom portion). The first surface 51 is a surface facing the rear, and the second surface 52 is a surface facing the front. The second surface 52 is located behind the first surface 51 and is arranged opposite to the first surface 51. The bottom surface 55 connects the first surface 51 and the second surface 52 to form the bottom of the drying space SP.

[0074] The first blow outlet 61 is provided on the first surface 51. For example, the first blow outlet 61 is an opening provided on the first surface 51, and is located at the upper part of the first surface 51. In this example, a plurality of first blow outlets 61 are arranged in the left-right direction (refer to FIG. 6(b)). In addition, the second blow outlet 62 is an opening provided on the second surface 52, and is located at the upper part of the second surface 52. In this example, a plurality of second blow outlets 62 are arranged in the left-right direction (refer to FIG. 6(a)). It should be noted that the first blow outlet 61 and the second blow outlet 62 are not limited to openings, and may be blow outlets such as nozzles provided on the first surface 51, the second surface 52, etc.

[0075] exist Figure 8 In the cross-section, the first surface 51 and the second surface 52 are curved surfaces. Specifically, the first surface 51 has a curved portion protruding toward the rear. The second surface 52 has a curved portion protruding toward the front. Therefore, the width (length in the front-to-back direction) of the drying space SP varies in the up-down direction. The drying space SP is widest at the upper end and has a narrow portion below the upper end. The first blow outlet 61 and the second blow outlet 62 are disposed below the upper end of the drying space SP. The first blow outlet 61 faces rearward and downward, and blows out air toward rearward and downward. The second blow outlet 62 faces frontward and downward, and blows out air toward frontward and downward.

[0076] like Figure 7 As shown, the inner surface 50i of the frame body 50 also has a third surface 53 and a fourth surface 54 opposite to the third surface 53. The third surface 53 is a surface facing the left side, and the fourth surface 54 is a surface facing the right side. The third surface 53 and the fourth surface 54 are surfaces connecting the first surface 51 and the second surface 52, respectively.

[0077] It should be noted that, in the embodiment, the shape of the frame 50 (inner surface 50i and outer surface 50j) is not limited to the above. For example, the opening for the user to insert the hand into the drying space may also face at least any one of the upper, front, right side and left side. An upper surface may be provided on the frame. In addition, the position, shape, number, etc. of the blow-out port are not limited to the above. For example, the blow-out port may be provided on at least any one of the first surface 51, the second surface 52, the third surface 53 and the fourth surface 54. Alternatively, in the case where the inner surface 50i of the frame 50 has an upper surface, a blow-out port may be provided on the upper surface. For example, the hand drying device may be configured to blow air downward from above the hand of the user inserted into the drying space at the front.

[0078] like Figure 7 As shown, the hand drying device 200 has an inlet 63 for sucking air in the drying space SP. The inlet 63 is provided on the inner surface 50i of the frame 50. For example, the inlet 63 is provided at the lower part of the inner surface 50i, and is located below the first outlet 61 and the second outlet 62. In this example, the inlet 63 is provided on the bottom surface 55 and is an opening facing upward.

[0079] Furthermore, if Figure 7 as well as Figure 8 As shown, the hand drying device 200 has a flow path portion 70 connecting the suction port 63 and the blow-out port (the first blow-out port 61 and the second blow-out port 62). The flow path portion 70 is provided inside the frame 50. The flow path portion 70 is a flow path that guides at least a portion of the air sucked from the suction port 63 to the blow-out port (the first blow-out port 61 and the second blow-out port 62).

[0080] In this example, if Figure 7 As shown, the flow path section 70 includes a first flow path 71 (eg, an inhalation flow path) and a second flow path 72 (eg, a circulation flow path). Fig. 9 As shown, the flow path portion 70 may have a third flow path 73 (eg, a discharge flow path).

[0081] The first flow path 71 extends downward from the suction port 63 and continues to the lower part of the hand drying device 200. Figure 7 As shown by arrow A1 , the first flow path 71 guides the air sucked from the suction port 63 toward the lower casing member 56 forming the bottom of the housing 50 .

[0082] The second flow path 72 is provided on the flow path portion 70 downstream of the first flow path 71. The second flow path 72 extends upward from the lower portion of the hand drying device 200. Figure 7 As shown by arrow A2, the second flow path 72 guides at least a portion of the air supplied from the first flow path 71 toward the outlets (the first outlet 61 and the second outlet 62).

[0083] More specifically, if Figure 8 As shown in FIG. 1 , the second flow path 72 includes a flow path 72a and a flow path 72b. In other words, the second flow path 72 is branched into the flow path 72a and the flow path 72b. As shown by arrow A3, the flow path 72a continues to the first outlet 61, and air is introduced into the first outlet 61. As shown by arrow A4, the flow path 72b continues to the second outlet 62, and air is introduced into the second outlet 62.

[0084] In addition, if Figure 7 As shown, the hand drying device 200 has a filter 67 and an air supply unit 65. The air supply unit 65 is arranged in the flow path unit 70. Specifically, the air supply unit 65 is arranged in the second flow path 72. The air supply unit 65 is, for example, an air supply fan that can be driven by one motor. The air supply unit 65 is driven to generate wind from the upstream to the downstream of the flow path unit 70 in the flow path unit 70. That is, the air supply unit 65 causes the suction port 63 to suck air, and causes at least a part of the air sucked by the suction port 63 to be blown out from the blowing outlet (the first blowing outlet 61 and the second blowing outlet 62) to the drying space SP via the flow path unit 70. It should be noted that, in an embodiment, the air supply unit may have more than two motors. More than two fans with more than one motor may be provided in the hand drying device.

[0085] The filter 67 has a first filter portion 67a and a second filter portion 67b. The first filter portion 67a is disposed in the second flow path 72. The first filter portion 67a is located above the lower shell component 56 and below the air supply portion 65. In other words, the first filter portion 67a is located downstream of the lower shell component 56 and upstream of the air supply portion 65 on the flow path portion 70. The first filter portion 67a captures particles (bacteria, dust) in the second flow path 72. The first filter portion 67a can capture particles smaller than the particles captured by the second filter portion 67b. The first filter portion 67a can adopt a HEPA filter, for example. The HEPA filter has a particle capture efficiency of more than 99.97% relative to particles of 0.3μm at a rated flow rate. The initial pressure loss of the HEPA filter is, for example, less than 245Pa.

[0086] The second filter 67b is provided in the first flow path 71. The second filter 67b captures particles in the first flow path 71. The second filter 67b can be a mesh filter including resin or metal. It should be noted that, in this example, two filters, namely the first filter 67a and the second filter 67b, are provided as the filter 67, but in the embodiment, the filter may be one, or may be three or more.

[0087] In addition, if Figure 8As shown, a heating unit 68 can be provided in the hand drying device 200. The heating unit 68 heats the air in the flow path unit 70. The heating unit 68 can be any heater or the like that can heat the gas toward the blow-out port. The air is heated by the heating unit 68, so that warm air can be blown out from the blow-out port. Thus, for example, when drying the user's hands, the user can be relieved from feeling cold, and the ease of use can be improved. It should be noted that although a heating unit is provided in this example, a heating unit may not be provided in an embodiment. On the flow path unit 70, the heating unit 68 is provided at a location upstream of the branch point where the flow path unit 70 branches into the flow path 72a and the flow path 72b. In this example, on the flow path unit 70, the heating unit 68 is located downstream of the air supply unit 65 and upstream of the third flow path 73 described later.

[0088] When the user inserts his hand into the drying space SP through the opening 50A, the detection unit 48 (see Figure 7 ) detects the user's hand. The detection unit 48 sends a signal to the control unit 69 (refer to Figure 7 ) outputs the detection result. The detection unit is, for example, a transmissive optical sensor (photointerrupter). The detection unit is not limited thereto and may be any sensor that can detect the user's hand. The detection unit may also be, for example, a reflective optical sensor, a distance measuring sensor, a pyroelectric sensor, an electrostatic capacitance sensor, an ultrasonic sensor, a microwave sensor, etc.

[0089] The control unit 69 is electrically connected to the detection unit 48, the air supply unit 65, and the heating unit 68. The control unit 69 controls the operation of the air supply unit 65 and the heating unit 68 according to the detection result of the detection unit 48. For example, if the detection unit 48 detects the hand of the user, the control unit 69 outputs a signal for starting the operation to the air supply unit 65 and the heating unit 25. In addition, for example, if the detection unit 48 does not detect the hand of the user, the control unit 69 outputs a signal for stopping the operation to the air supply unit 65 and the heating unit 68. It should be noted that the control unit is a control circuit including a processor, etc. The control unit includes, for example, a microcomputer.

[0090] Fig. 9 6( a ) is a schematic diagram showing the air flow of the hand dryer.

[0091] Fig. 9 The arrows in the figure indicate the direction of air flow or wind. Fig. 9 As shown, the hand drying device 200 further includes an exhaust port 64. The exhaust port 64 exhausts a part of the air sucked from the suction port 63 from the flow path portion 70. In addition, the flow path portion 70 includes a third flow path 73 (eg, exhaust flow path) connected to the exhaust port 64.

[0092] In this example, the third flow path 73 branches off from the second flow path 72. That is, a portion of the air flowing into the second flow path 72 is discharged from the discharge port 64 to the outside of the flow path portion 70 via the third flow path 73. Another portion of the air flowing into the second flow path 72 is ejected from the outlet (the first outlet 61 and the second outlet 62) via the flow paths 72a and 72b of the second flow path 72.

[0093] For example, on the flow path portion 70, the branch point between the second flow path 72 and the third flow path 73 is located downstream of the air supply portion 65 and upstream of the branch point between the flow path 72a and the flow path 72b. On the flow path portion 70, the branch point between the second flow path 72 and the third flow path 73 may be located either downstream or upstream of the heating portion 68. However, the present invention is not limited thereto, and the third flow path 73 may also branch out from any position on the flow path portion between the suction port and the blowing port. For example, the third flow path 73 may also branch out from the first flow path 71.

[0094] The outlet 64 is, for example, disposed on the outer surface 50j of the frame 50. That is, the outlet 64 is exposed on the outer surface 50j of the frame 50. In this case, the outlet 64 directly discharges the air in the flow path 70 to the outside of the frame 50, that is, to the outside of the hand drying device 200. The outlet 64 is, for example, disposed on the back surface 92 of the frame 50 (see FIG. 6(b)). Without being limited thereto, the outlet 64 may also be disposed on at least any one of the front surface 91, the right side surface 93, the left side surface 94, and the bottom surface 95 of the frame 50.

[0095] The outlet 64 may be located inside the frame 50. In other words, the outlet 64 may not be exposed on the outer surface 50j. In this case, the outlet 64 discharges the air in the flow path 70 into the frame 50, that is, into the hand dryer 200.

[0096] It should be noted that, in the embodiment, it is not necessary to provide the third flow path 73 and the exhaust port 64. For example, the third flow path 73 may be omitted, and the exhaust port 64 may be an opening provided at any position of the flow path portion 70, such as the first flow path 71 or the second flow path 72. In addition, as required, an inlet and an intake flow path for taking in air from the outside may be provided in the flow path portion 70.

[0097] If the hand of the user in the drying space SP is detected and the air supply unit 65 is driven, the circulating wind w1 is generated. The circulating wind w1 is the air flow sucked downward from the suction port 63. The circulating wind w1 flows into the second flow path 72 via the first flow path 71 and rises. The circulating wind w1 flows through the first filter 67a and the air supply unit 65. The circulating wind w1 after flowing through the air supply unit 65 generates drying wind w2 and exhaust wind w3. The drying wind w2 is a part of the air delivered by the circulating wind w1, and is an air flow ejected from the blowing outlet (the first blowing outlet 61 and the second blowing outlet 62). The drying wind w2 includes the wind w2a ejected from the first blowing outlet 61 to the drying space SP and the wind w2b ejected from the second blowing outlet 62 to the drying space SP. The exhaust wind w3 is another part of the air delivered by the circulating wind w1, and is the flow of air discharged from the exhaust port 64. In addition, if the air supply unit 65 is driven, the suction wind w4 is generated. The suction wind w4 is a flow of air flowing from the outside of the hand dryer 200 into the drying space SP through the opening 50A.

[0098] For example, the air volume of the circulating air w1 (the amount of air moved per unit time) corresponds to the sum of the air volume of the drying air w2 and the air volume of the exhaust air w3. In addition, for example, the air volume of the suction air w4 corresponds to the air volume of the exhaust air w3. The hand drying device 200 is a circulation-type hand drying device that circulates at least a portion of the air in the drying space SP in the drying space SP and the flow path portion 70.

[0099] For example, the hand dryer 200 is configured to inhale air from the suction port 63 and blow air from the blowout ports (the first blowout port 61 and the second blowout port 62 ) during the driving process of the air supply unit 65 , thereby preventing the air in the drying space SP from leaking to the outside through the opening 50A.

[0100] Thus, for example, the generation of wind from the drying space SP toward the user (for example, the user's face, etc.) can be suppressed, so the user can dry his hands comfortably, and the convenience of use is high. In addition, for example, by the air hitting the user's hands from the blow outlet (the first blow outlet 61 and the second blow outlet 62), it is possible to suppress the water droplets attached to the user's hands from becoming droplets and flying from the opening 50A. Even if bacteria, viruses, etc. are attached to the user's hands, the possibility of the bacteria, viruses being discharged to the outside of the hand drying device 200 together with the droplets can be reduced by the air hitting the user's hands from the blow outlet (the first blow outlet 61 and the second blow outlet 62), and the hygiene is good.

[0101] For example, during the driving process of the air supply unit 65, the drying space SP becomes a negative pressure state with a low air pressure compared to the outside of the hand drying device 200. As a result, it is possible to suppress the air in the drying space SP from leaking to the outside from the opening 50A. In the embodiment, a suction port 63 is provided in the drying space SP. By sucking the air in the drying space SP from the suction port 63, the drying space SP can be made into a negative pressure state. In this way, the hand drying device involved in the embodiment can be configured to use an air supply unit that can be driven by one motor to suck the air in the drying space from the suction port, thereby ensuring the required minimum negative pressure.

[0102] As described above, a portion of the air in the flow path portion 70 is discharged through the exhaust port 64. In this case, for example, the air volume of the circulating air w1 is greater than the air volume of the drying air w2. For example, the air volume of the drying air w2 corresponds to the amount obtained by subtracting the air volume of the exhaust air w3 from the air volume of the circulating air w1. By discharging a portion of the air sucked in from the suction port 63 from the flow path portion 70, it is easy to make the drying space SP a negative pressure state, and it is easy to ensure the required minimum negative pressure. Therefore, by providing the exhaust port 64, it is possible to further suppress the leakage of air in the drying space SP from the opening 50A, which can improve the ease of use.

[0103] For example, if the drying space SP is in a negative pressure state, it corresponds to the following situation: under the assumption that the opening 50A (the opening directly leading from the drying space SP to the outside of the frame 50) is blocked, if the air supply unit 65 is driven, the drying space SP becomes negative pressure. At this time, the first blow outlet 61, the second blow outlet 62, and the suction port 63 (the opening leading from the drying space SP to the inside of the frame 50) are in an open state. That is, for example, the negative pressure state refers to a state in which the air volume of the air flowing out of the drying space is greater than the air volume of the air flowing into the drying space, except for the inflow and outflow of air from the opening for the user to put his hand.

[0104] In addition, for example, during the driving process of the air supply unit 65, suction wind w4 is generated. Thus, it is possible to suppress the air in the drying space SP from leaking to the outside from the opening 50A. In the embodiment, the air in the drying space SP is sucked in from the suction port 63. Thus, it is possible to generate suction wind w4 that flows into the drying space SP. In this example, the direction of the circulating wind w1 is downward, which is the opposite direction of the opening 50A. In addition, the direction of the drying wind w2 is obliquely downward, which is the opposite direction of the opening 50A. Thus, it is easy to generate a downward flow of air in the drying space SP. As a result, external air is introduced into the drying space SP through the opening 50A, and suction wind w4 is easily generated. For example, the air volume of the drying wind w2 is increased or the wind speed of the drying wind w2 is increased. Thus, a downward flow of air is generated, and suction wind w4 is easily generated. The wind speed of the drying wind w2 can be higher than the wind speed of the circulating wind w1.

[0105] In addition, in this embodiment, the air supply unit 65 can use one motor to suck air from the suction port 63 and blow air from the blowout ports (the first blowout port 61 and the second blowout port 62). Therefore, it is not necessary to provide two or more motors, and the hand drying device 200 can be miniaturized.

[0106] In addition, in a circulating hand drying device, there is a situation where the temperature of the wind tends to rise. For example, the circulating air is repeatedly heated by the heating unit 68. In response to this, by discharging a portion of the air from the exhaust port 64, the rise in the temperature of the wind can be suppressed. Thus, for example, damage to a substrate such as a control unit caused by heat can be suppressed, and the operation is more stable. As mentioned above, in this example, the exhaust port 64 discharges the air in the flow path portion 70 directly to the outside of the machine. Thus, the rise in the temperature of the wind can be further suppressed. In addition, the exhaust port 64 can easily generate the suction wind w4 by discharging the air in the flow path portion 70 directly to the outside of the machine, and the rise in the temperature of the wind caused by the suction wind w4 can be suppressed.

[0107] In addition, if Fig. 9 As shown, the first filter 67a is located upstream of the discharge port 64 on the flow path 70. By locating the first filter 67a upstream of the discharge port 64, the air discharged from the discharge port 64 can be cleaned, and the usability can be improved.

[0108] It should be noted that, in this example, the first filter 67a is disposed upstream of the air supply unit 65. The first filter 67a may be disposed downstream of the air supply unit 65 or in the third flow path 73. When the first filter 67a is disposed upstream of the branch point between the second flow path 72 and the third flow path 73, not only the air discharged from the discharge port 64 can be cleaned, but also the air blown out from the first blow port 61 and the second blow port 62 can be cleaned, which can further improve the ease of use.

[0109] In addition, for example, the air volume of the air blown out from the blow-out port (the air volume of the drying air w2) is smaller than the air volume of the air inhaled from the suction port 63 (the air volume of the circulating air w1) and is larger than the air volume of the air discharged from the exhaust port 64 (the air volume of the exhaust air w3). In this case, since the air volume of the air inhaled from the suction port 63 is larger, it is possible to suppress the air in the drying space SP from leaking out of the opening 50A. In addition, by making the air volume of the air blown out from the blow-out port greater than the air volume of the air discharged from the exhaust port 64, the drying performance can be maintained. For example, more air can be sprayed onto the user's hands, so it is easy to dry the hands faster. It should be noted that the air volume of the air blown out from the blow-out port is the sum of the air volume of the air blown out from the first blow-out port 61 and the air volume of the air blown out from the second blow-out port 62.

[0110] Each air volume can be appropriately adjusted according to the pressure loss of the fluid flowing in each flow path, for example. The pressure loss can be appropriately adjusted according to the cross-sectional area of ​​the flow path, for example. For example, the pressure loss of the fluid flowing in the first flow path 71 is smaller than the pressure loss of the fluid flowing in the second flow path 72, and smaller than the pressure loss of the fluid flowing in the third flow path 73. For example, the minimum cross-sectional area of ​​the first flow path 71 is larger than the minimum cross-sectional area of ​​the second flow path 72, and larger than the minimum cross-sectional area of ​​the third flow path 73. In addition, for example, the pressure loss of the fluid flowing in the second flow path 72 is smaller than the pressure loss of the fluid flowing in the third flow path 73. For example, the minimum cross-sectional area of ​​the second flow path 72 is larger than the minimum cross-sectional area of ​​the third flow path 73.

[0111] For example, when a user standing in front of the hand drying device 200 inserts his hand through the opening 50A, the first blow outlet 61 blows air toward the palm of the user's hand, and the second blow outlet 62 blows air toward the back of the user's hand. Thus, both sides of the user's hand can be dried at the same time, and the drying performance is improved. In order to achieve high-speed drying, it is preferred to blow air at a high speed.

[0112] For example, the direction D2 in which the second outlet 62 blows out air is further downward than the direction D1 in which the first outlet 61 blows out air. In other words, the angle θ2 formed by the direction D2 and the vertical downward direction is smaller than the angle θ1 formed by the direction D1 and the vertical downward direction. In this case, the second outlet 62 blows out air downward, so it is easy to blow air from above to the back of the user's hand. As a result, water is easily moved downward (falling), which can further suppress the water droplets that become splashes from the opening.

[0113] The direction D1 can be appropriately adjusted according to the orientation and shape of the opening of the first outlet 61. When the air blown out from the first outlet 61 has a width in the vertical direction, the direction D1 can be represented by, for example, the center line of the range of the air blown out from the first outlet 61. Similarly, the direction D2 can be appropriately adjusted according to the orientation and shape of the opening of the second outlet 62. When the air blown out from the second outlet 62 has a width in the vertical direction, the direction D2 can be represented by, for example, the center line of the range of the air blown out from the second outlet 62.

[0114] In addition, for example, the air volume of the air blown out of the first outlet 61 is larger than the air volume of the air blown out of the second outlet 62. In this case, by making the air volume of the first outlet 61 larger, it is possible to maintain the drying performance while suppressing power consumption. For example, by blowing more air to the palm side of the user's hand, which is more likely to have more water droplets attached, the hand is easier to dry earlier.

[0115] It should be noted that, when a plurality of first outlets 61 are provided, the air volume of the air blown out of the first outlet 61 is the sum of the air volumes of the air blown out of all the first outlets 61. Similarly, when a plurality of second outlets 62 are provided, the air volume of the air blown out of the second outlet 62 is the sum of the air volumes of the air blown out of all the second outlets 62.

[0116] For example, the pressure loss of the fluid flowing in the flow path 72a is smaller than the pressure loss of the fluid flowing in the flow path 72b. For example, the minimum cross-sectional area of ​​the flow path 72a is larger than the minimum cross-sectional area of ​​the flow path 72b.

[0117] In addition, for example, the wind speed of the air blown out of the first blowing outlet 61 may be higher than the wind speed of the air blown out of the second blowing outlet 62. The wind speed of the air blown out of the first blowing outlet 61 can be appropriately adjusted according to the pressure loss of the fluid flowing in the flow path 72a and the shape of the first blowing outlet 61 (for example, the size of the opening diameter). In addition, the wind speed of the air blown out of the second blowing outlet 62 can be appropriately adjusted according to the pressure loss of the fluid flowing in the flow path 72b and the shape of the second blowing outlet 62 (for example, the size of the opening diameter).

[0118] like Figure 7 As shown, the hand drying device 200 has a drain port 80, a water channel 81, and a water receiving portion 82. The water receiving portion 82 is a water receiving tray that collects water in the drying space SP. The water in the drying space SP is, for example, water droplets attached to the user's hands. The drain port 80 discharges the water in the drying space SP to the water receiving portion 82. The water channel 81 connects the drain port 80 and the water receiving portion 82. The water channel 81 guides the water in the drying space SP from the drain port 80 to the water receiving portion 82.

[0119] The drain outlet 80 is disposed on the inner surface 50i of the frame 50. The position of the drain outlet 80 is different from the position of the suction port 63. That is, the drain outlet 80 is away from the suction port 63. In this example, the drain outlet 80 is an opening disposed on the bottom surface 55. More specifically, the drain outlet 80 is located at one end (the left end) of the bottom surface 55, and the suction port 63 is located at the other end (the right end) of the bottom surface 55. In other words, the drain outlet 80 is disposed adjacent to the fourth surface 54, and the suction port 63 is disposed adjacent to the third surface 53. In this way, by providing a drain outlet 80 different from the suction port 63, the water and air in the drying space can be separated. As a result, the air flowing through the flow path portion is cleaner, which can further improve the ease of use.

[0120] The water channel 81 and the water receiving portion 82 are separated from the flow path portion 70. That is, the water channel 81 and the water receiving portion 82 are provided independently of the flow path portion 70. In this example, the water channel 81 is adjacent to the fourth surface 54 and extends downward from the drain port 80. The water receiving portion 82 is located below the water channel 81. On the other hand, the first flow channel 71 of the flow path portion 70 is adjacent to the third surface 53 and extends downward from the suction port 63.

[0121] For example, if the water in the water receiving portion contacts the air, the air may be polluted by the substances and odors contained in the water. In response to this, in the embodiment, by separating the water in the water receiving portion 82 from the air flowing through the flow path portion 70, it is possible to suppress the air flowing through the flow path portion 70 from being polluted. That is, the circulating air blown out from the first blowing port 61 and the second blowing port 62, the air discharged from the exhaust port 64, and the air flowing through the first filter portion 67a can be made into a cleaner state. Thus, for example, the unpleasant odor of the air blown out from the first blowing port 61, the second blowing port 62, and the exhaust port 64 can be suppressed, and the hygiene can be improved. In addition, for example, by suppressing the contact between the first filter portion 67a and the polluted air, the performance degradation of the filter can be suppressed.

[0122] In addition, for example, Figure 7 As shown, the bottom surface 55 has a downward slope from the suction port 63 toward the drain port 80. That is, the position of the drain port 80 is lower than the position of the suction port 63. Thus, water on the bottom surface 55 flows toward the drain port 80, so that water can be prevented from intruding into the flow path portion 70 from the suction port 63.

[0123] In addition, ribs 57 are provided on the bottom surface 55. The ribs 57 protrude upward from the end of the suction port 63. The ribs 57 can suppress the water on the bottom surface 55 from intruding into the flow path portion 70 from the suction port 63.

[0124] In addition, if Figure 7As shown by the middle dotted line, a rib 59 may be provided above the suction port 63. The rib 59 is an eave protruding obliquely downward from the third surface 53. The rib 59 overlaps at least a portion of the suction port 63 in the vertical direction. The rib 59 can prevent water in the drying space SP from intruding into the flow path portion 70 from the suction port 63.

[0125] Fig.10 This is a schematic perspective view showing a part of the hand drying device of FIG. 6( a ).

[0126] FIG. 11( a ) and FIG. 11( b ) show Fig.10 Schematic cross-sectional view of a portion of a hand drying device.

[0127] Fig.10 The lower housing member 56 and its surroundings of the hand drying device 200 are shown in FIG11(a). Fig.10 FIG11(b) shows the cross section of the CC line. Fig.10 The cross section along line DD is shown.

[0128] The lower casing member 56 is a member that forms a part of the flow path portion 70. The lower casing member 56 is in a disk shape that serves as the bottom of the flow path portion 70. The air in the flow path portion 70 passes through the lower casing member 56.

[0129] like Fig.10 As shown, the hand drying device 200 has a water channel 83, a water receiving portion 84, and a water level sensor 88. The hand drying device 200 also has a water outlet 85 (see FIG. 11(a)) and a partition 86 (see FIG. 11(b)).

[0130] The water receiving portion 84 is a water receiving tray that collects water that has entered the flow path portion 70. The water receiving portion 84 is disposed below the lower casing member 56. In other words, the water receiving portion 84 is located below the flow path portion 70.

[0131] The drain port 85 is provided in the flow path portion 70, and discharges water that has entered the flow path portion 70 to the water receiving portion 84. As shown in FIG. 11(a), the drain port 85 is an opening provided on the side surface of the lower casing member 56.

[0132] The water channel 83 is provided in the flow channel portion 70 to guide the water entering the flow channel portion 70 to the drain port 85. Fig.10As shown in FIG. 11( a ), the water channel 83 is a recessed portion provided on the upper surface of the lower housing member 56. The water channel 83 extends from the central portion of the lower housing member 56 toward the drain port 85. The water channel 83 has a downward slope from the central portion of the lower housing member 56 toward the drain port 85. In addition, a downward slope toward the central portion of the lower housing member 56 is provided on the upper surface of the lower housing member 56. Thus, water droplets and the like that have intruded into the flow path portion 70 and adhered to the lower housing member 56 are discharged from the drain port 85 to the water receiving portion 84 through the water channel 83.

[0133] As shown in FIG. 11( b ), the partition 86 is provided between the flow path 70 and the water receiving portion 84. For example, the partition 86 is a part of the lower housing member 56, and partitions the flow path 70 and the water receiving portion 84 in the vertical direction. The partition 86 covers at least a part of the upper part of the water receiving portion 84. For example, the partition 86 covers the entire range of the water receiving portion 84 receiving water.

[0134] With such a structure, even if water intrudes into the flow path portion 70, the water intruding into the flow path portion 70 can be separated from the air in the flow path portion 70. As a result, the air flowing through the flow path portion 70 becomes cleaner, and the convenience of use can be further improved. That is, by separating the water receiving portion 84 from the air flowing through the flow path portion 70, it is possible to suppress the air flowing through the flow path portion 70 from being polluted. The air blown out from the first outlet 61 and the second outlet 62 for circulation, the air discharged from the outlet 64, and the air flowing through the first filter portion 67a can be made cleaner.

[0135] The water level sensor 88 is mounted on the lower casing member 56. The water level sensor 88 detects the water level on the lower casing member 56. Thus, even if a large amount of water enters the flow path portion 70, water accumulated on the lower casing member 56 can be detected. The water level sensor can be any sensor that can detect the water level on the lower casing member 56, such as an electrostatic capacitance type, a pressure type, or a floating type.

[0136] Fig.12 This is a schematic perspective view showing a part of the hand drying device of FIG. 6( a ).

[0137] like Fig.12 As shown, the hand drying device 200 may further include a drain cap 87. The drain cap 87 is attached to the drain port 85. By removing the drain cap 87, the water flowing in the water channel 83 can be discharged from the drain port 85 to the outside of the flow channel portion 70.

[0138] Fig.13 This is a schematic exploded view showing the hand drying device of FIG6(a).

[0139] The water receiving portion 82 is exposed on the outer surface 50j of the frame 50. For example, the water receiving portion 82 forms a part of the front surface of the hand drying device 200. Fig.13 As shown, the water receiving portion 82 is detachable from the frame 50. The user or manager of the hand drying device 200 can pull the water receiving portion 82 out of the frame 50 to drain the water collected in the water receiving portion 82 or clean the area around the water receiving portion 82.

[0140] The cover 91a forming a part of the front of the hand drying device 200 is detachably provided below the water receiving portion 82. If the cover 91a is removed from the frame 50, the cover 91b and the water receiving portion 84 are exposed. The water receiving portion 84 is detachably provided with respect to the lower housing member 56. The user or manager of the hand drying device 200 can pull the water receiving portion 84 out of the lower housing member 56, remove the water gathered in the water receiving portion 84 or clean the surrounding of the water receiving portion 84. In addition, the cover 91b is detachably provided. By removing the cover 91b, the user or manager of the hand drying device 200 can remove the first filter 67a for replacement. In this way, by making the first filter 67a, the water receiving portion 82, and the water receiving portion 84 detachable, management is facilitated. It should be noted that, regarding the attachment and detachment of the water receiving portion 82, the water receiving portion 84, the cover 91a, and the cover 91b, for example, a claw, a concave-convex engaging portion, etc., can be appropriately provided. The present invention is not limited thereto, and any structure that allows the water receiving portion 82, the water receiving portion 84, the cover body 91a, and the cover body 91b to be attached and detached may be used.

[0141] Fig.14 It is a schematic diagram which shows the airflow of another hand dryer which concerns on embodiment.

[0142] exist Fig.14 In the hand drying device 201 shown, an air supply unit 65a (first air supply unit) and an air supply unit 65b (second air supply unit) may be provided instead of the air supply unit 65. In addition, in the hand drying device 201, a frame 50 having an inner surface 50i and an opening 50A, a suction port 63, an air outlet (a first air outlet 61 and a second air outlet 62), a flow path unit 70, an exhaust port 64, a control unit 69, and a filter unit (a first filter unit 67a and a second filter unit 67b) are provided in the same manner as the hand drying device 200.

[0143] The air supply unit 65a and the air supply unit 65b are air supply fans each having a motor. For example, the air supply unit 65a is disposed on the flow path unit 70 at a position upstream of the air supply unit 65b and the first filter unit 67a. The air supply unit 65a is disposed on the first flow path 71. The air supply unit 65b is disposed on the flow path unit 70 at a position downstream of the first filter unit 67a and upstream of the third flow path 73. The air supply unit 65b is disposed on the second flow path 72. The driving of each of the air supply unit 65a and the air supply unit 65b is controlled by the control unit 69.

[0144] If the user inserts a wet hand into the drying space SP from the opening, the detection unit 48 detects the hand. If the detection unit 48 detects the hand, a signal is sent from the detection unit 48 to the control unit 69. If the control unit 69 receives the signal, it executes control to drive the air supply unit 65a. Thereafter, after a prescribed time has passed since the start of the driving of the air supply unit 65a, control to drive the air supply unit 65b is executed. That is, if the detection unit 40 detects the hand, the air supply unit 65b is driven later after the air supply unit 65a is driven. By driving the air supply unit 65a before the air supply unit 65b, it is possible to further suppress the leakage of air in the drying space SP from the opening. It should be noted that the above-mentioned prescribed time for driving the air supply unit 65b later is, for example, about 0.01 seconds or more and about 2.0 seconds or less, but it is not particularly limited and can be specified as appropriate.

[0145] If the wet hand is moved out of the drying space SP from the opening, the detection unit 48 cannot detect the hand. At this time, the control unit 69 executes the control to stop the drive of the air supply unit 65b. After that, after a specified time has passed since the drive of the air supply unit 65b was stopped, the control to stop the drive of the air supply unit 65a is executed. That is, if the detection unit 48 cannot detect the hand, the drive of the air supply unit 65a is stopped later after the drive of the air supply unit 65b is stopped. By stopping the drive of the air supply unit 65b before the drive of the air supply unit 65a, the air in the drying space SP can be further suppressed from leaking out of the opening. It should be noted that the above-mentioned specified time for stopping the drive of the air supply unit 65a later is, for example, about 0.01 seconds or more and about 2.0 seconds or less, but it is not particularly limited and can be specified as appropriate.

[0146] During the period when the air supply unit 65b is driven, the air supply unit 65a is driven. That is, during the period when the air supply unit 65b is driven, the control unit 69 performs control to drive the air supply unit 65a. Thus, it is possible to reliably suppress the air in the drying space SP from leaking out from the opening. That is, during the period when the air is blown out from the blow-out port into the drying space SP, it becomes easy to suck the air in the drying space SP from the suction port 63, so it is possible to further suppress the air in the drying space SP from leaking out from the opening.

[0147] In addition, for example, when the air supply unit 65a and the air supply unit 65b are driven, the air supply unit 65a and the air supply unit 65b operate in such a manner that the air volume of the air sucked from the suction port 63 is greater than the air volume of the air blown out from the blow-out port. Thus, it is possible to further suppress the air in the drying space SP from leaking out from the opening for inserting the hand.

[0148] For example, when the air supply unit 65a and the air supply unit 65b are driven, the air supply unit 65a and the air supply unit 65b operate in a manner such that the output of the air supply unit 65a is greater than the output of the air supply unit 65b. That is, the control unit 69 performs control such that the output of the motor of the air supply fan of the air supply unit 65a is greater than the output of the motor of the air supply fan of the air supply unit 65b.

[0149] Thus, by operating the air supply unit 65a with a greater output than the air supply unit 65b, the air volume sucked from the suction port 63 can be made greater than the air volume blown out from the blow-out port. Thus, the air in the drying space can be further prevented from leaking from the opening for hand insertion.

[0150] For example, when the air supply units 65a and 65b are driven, the volume of air blown out from the blow-out port may be larger than the volume of air discharged from the discharge port 64. Since a large amount of air is blown out from the blow-out port, the drying performance can be maintained.

[0151] Fig.15 It is a schematic diagram which shows the airflow of another hand dryer which concerns on embodiment.

[0152] exist Fig.15 The hand drying device 202 shown is provided with a suction port 63b (second suction port) and a flow path portion 70b (second flow path portion). In addition, the hand drying device 202 is also provided with a frame 50 having an inner surface 50i and an opening 50A, a suction port 63 (first suction port), an outlet (first outlet 61 and second outlet 62), a flow path portion 70 (first flow path portion), an air supply portion 65 (first air supply portion), a control portion 69, a filter portion (first filter portion 67a and second filter portion 67b), and a detection portion 48, etc., similarly to the hand drying device 200.

[0153] In this example, the third flow path 73 and the discharge port 64 are not provided. However, the third flow path 73 and the discharge port 64 may be provided as required. Fig.15 For simplicity, the water receiving portion 82 is omitted.

[0154] The suction port 63b is an opening provided on the inner surface 50i of the frame 50. The suction port 63b sucks the air in the drying space SP. For example, the suction port 63b is provided on at least one of the bottom surface 55 and the side surface of the inner surface 50i, and is exposed on the inner surface 50i. It should be noted that the side surface of the inner surface 50i is a surface extending upward from the bottom surface 55, such as the aforementioned first surface 51 and the second surface 52. The suction port 63b is located below the blowing outlet (the first blowing outlet 61 and the second blowing outlet 62). In this example, the suction port 63b opens upward and sucks the air in the drying space SP downward.

[0155] The exhaust port 64b exhausts the air in the drying space SP sucked from the suction port 63b to the outside of the drying space SP. For example, the exhaust port 64b is an opening provided on the outer surface 50j of the frame 50, and is exposed on the outer surface 50j. In this case, the exhaust port 64b exhausts the air to the outside of the hand drying device 202, that is, to the outside of the frame 50. The exhaust port 64b is, for example, provided on the bottom surface 95 of the outer surface 50j, opens downward, and exhausts the air downward. Thus, it is possible to prevent the exhaust port 64b from exhausting air toward the user. However, the exhaust port 64b may also be provided on the back side 92, the right side 93, or the left side 94 of the outer surface 50j, so that the air can be exhausted to the rear or side.

[0156] The flow path portion 70b connects the suction port 63b and the discharge port 64b. The flow path portion 70b extends downward from the suction port 63b to the discharge port 64b. The air sucked from the suction port 63b passes through the flow path portion 70b and is discharged from the discharge port 64b.

[0157] The flow path portion 70b is a flow path different from the flow path portion 70. That is, the flow path portion 70 and the flow path portion 70b are separated and independent from each other. The flow path portion 70b does not merge with the flow path portion 70. The flow path portion 70b does not share a part of the flow path with the flow path portion 70.

[0158] The hand drying device 202 may include an air supply unit 65c (second air supply unit) for sucking air into the air inlet 63b. The air supply unit 65c is, for example, an air supply fan provided in the flow path 70b. The air supply unit 65 (first air supply unit) and the air supply unit 65c (second air supply unit) are air supply fans each having a motor.

[0159] If the air supply unit 65 (first air supply unit) is driven, wind is generated in the flow path unit 70. As a result, the air in the drying space SP is sucked in from the suction port 63. The air sucked in from the suction port 63 is blown out from the blow-out port (the first blow-out port 61 and the second blow-out port 62) and circulates in the hand drying device 202. On the other hand, if the air supply unit 65c (second air supply unit) is driven, wind is generated in the flow path unit 70b. As a result, the air in the drying space SP is sucked in from the suction port 63b. The air sucked in from the suction port 63b flows downward in the flow path unit 70b and is discharged to the outside from the discharge port 64b.

[0160] In this way, the air in the drying space SP is sucked in through the suction port 63 and the suction port 63b. Thus, it is possible to prevent the air in the drying space SP from leaking out of the opening during the drying of the hands, thereby improving the convenience of use. In addition, by discharging the air sucked in from the suction port 63b from the discharge port 64b to the outside of the drying space SP, the air volume sucked in from the suction port (the suction port 63 and the suction port 63b) can be made greater than the air volume blown out from the blowout port, thereby further preventing the air in the drying space SP from leaking out of the opening.

[0161] The respective driving of the air supply unit 65 and the air supply unit 65c is controlled by the control unit 69. If the user inserts a wet hand into the drying space SP from the opening, the detection unit 48 detects the hand. If the detection unit 48 detects the hand, a signal is sent from the detection unit 48 to the control unit 69. If the control unit 69 receives the signal, it executes the control to drive the air supply unit 65c. Thereafter, after a prescribed time has passed since the start of the driving of the air supply unit 65c, the control to drive the air supply unit 65 is executed. That is, if the detection unit 48 detects the hand, the air supply unit 65c is driven, and then the air supply unit 65 is driven later. By driving the air supply unit 65c before the air supply unit 65, it is possible to further suppress the leakage of air in the drying space SP from the opening. It should be noted that the above-mentioned prescribed time for delaying the driving of the air supply unit 65 is, for example, about 0.01 seconds or more and about 2.0 seconds or less, but it is not particularly limited and can be specified as appropriate.

[0162] If the wet hand is moved out of the drying space SP from the opening, the detection unit 48 cannot detect the hand. At this time, the control unit 69 executes the control to stop the drive of the air supply unit 65. Thereafter, after a prescribed time has passed since the drive of the air supply unit 65 was stopped, the control to stop the drive of the air supply unit 65c is executed. That is, if the detection unit 48 cannot detect the hand, the drive of the air supply unit 65 is stopped, and then the drive of the air supply unit 65c is stopped later. By stopping the drive of the air supply unit 65 before the drive of the air supply unit 65c, it is possible to reliably suppress the air in the drying space SP from leaking out of the opening. It should be noted that the above-mentioned prescribed time for stopping the drive of the air supply unit 65c later is, for example, about 0.01 seconds or more and about 2.0 seconds or less, but it is not particularly limited and can be specified as appropriate.

[0163] During the period when the air supply unit 65 is driven, the air supply unit 65c is driven. That is, during the period when the air supply unit 65 is driven, the control unit 69 performs control to drive the air supply unit 65c. Thus, it is possible to reliably suppress the air in the drying space from leaking out from the opening. That is, during the period when the air is blown out from the blow-out port into the drying space SP, it becomes easy to suck the air in the drying space SP from the suction port 63b, so it is possible to further suppress the air in the drying space SP from leaking out from the opening.

[0164] In addition, when the air supply unit 65 and the air supply unit 65c are driven, the air supply unit 65 and the air supply unit 65c operate in such a manner that the air volume of the air sucked from the suction port is greater than the air volume of the air blown out from the blow-out port. Thus, it is possible to further suppress the air in the drying space SP from leaking out of the opening for inserting the hand. It should be noted that, in this example, the air volume of the air sucked from the suction port refers to the sum of the air volume of the air sucked from the suction port 63 and the air volume of the air sucked from the suction port 63b.

[0165] For example, Fig.15 As shown, when the flow path unit 70 is not provided with the third flow path 73 and the exhaust port 64, the air volume of the air supply unit 65 can be used as the "air volume of the air blown out from the outlet". In addition, in this example, the air volume of the air supply unit 65 can be used as the air volume of the air sucked from the suction port 63. In addition, for example, the air volume of the air supply unit 65c can be used as the air volume of the air sucked from the suction port 63b.

[0166] When the air supply unit 65 and the air supply unit 65c are driven, the air volume of the air blown out from the blow-out port may be smaller than the air volume of the air sucked from the suction port 63b. In other words, when the air supply unit 65 and the air supply unit 65b are driven, the air volume of the air sucked from the suction port 63 may be smaller than the air volume of the air sucked from the suction port 63b. Thus, it is possible to further suppress the air in the drying space from leaking out from the opening for inserting the hand.

[0167] Alternatively, when the air supply unit 65 and the air supply unit 65c are driven, the air volume of the air blown out from the blow-out port may be greater than the air volume of the air sucked in from the suction port 63b. In other words, when the air supply unit 65 and the air supply unit 65c are driven, the air volume of the air sucked in from the suction port 63 may be greater than the air volume of the air sucked in from the suction port 63b. In this case, since more air is blown out from the blow-out port, the drying performance is improved.

[0168] For example, the air supply unit 65 and the air supply unit 65c operate in such a manner that the output of the air supply unit 65c is greater than the output of the air supply unit 65. The control unit 69 performs control to make the output of the motor of the air supply fan of the air supply unit 65c greater than the output of the motor of the air supply fan of the air supply unit 65. In this way, by operating the air supply unit 65c with a greater output than the air supply unit 65, the air volume of the air sucked from the suction port can be greater than the air volume of the air blown out from the blow-out port. In this way, it is possible to further suppress the air in the drying space from leaking out of the opening for inserting the hand.

[0169] Alternatively, the air supply unit 65 and the air supply unit 65c operate in a manner such that the output of the air supply unit 65 is greater than the output of the air supply unit 65c. The control unit 69 performs control to make the output of the motor of the air supply fan of the air supply unit 65 greater than the output of the motor of the air supply fan of the air supply unit 65c. In this way, by operating the air supply unit 65 with a greater output than the air supply unit 65c, the air volume of the air blown out from the blow-out port can be increased. In this case, since more air is blown out from the blow-out port, the drying performance is improved.

[0170] The hand drying device 202 may further include a filter 67c. The filter 67c is provided in the flow path 70b and is located upstream or downstream of the air supply unit 65c. By providing the filter 67c, the air discharged from the discharge port 64b can be made cleaner.

[0171] It should be noted that the air supply unit 65c is provided as needed and may be omitted as appropriate. For example, even if the air supply unit 65c is not provided, there is a case where the air in the drying space SP can be discharged from the suction port 63, the flow path unit 70b, and the discharge port 64c to the outside of the drying space SP through the ventilation duct of the building or the like where the hand drying device 202 is provided and the fan provided at the ventilation duct. On the other hand, when the air supply unit 65c is provided, it is easier to increase the air volume of the air sucked from the suction port 63 and the suction port 63b, and it is possible to further suppress the air in the drying space from leaking out of the opening for inserting the hand.

[0172] Fig.16 It is a schematic diagram which shows the airflow of another hand dryer which concerns on embodiment.

[0173] exist Fig.16 The hand drying device 203 shown is provided with an exhaust port 64c and an external air intake port 66. A flow path portion 70c (first flow path portion) and a flow path portion 70d (second flow path portion) are provided instead of the flow path portion 70. An air supply portion 65d (first air supply portion) and an air supply portion 65e (second air supply portion) are provided instead of the air supply portion 65. In addition, the hand drying device 203 is also provided with a frame 50 having an inner surface 50i and an opening 50A, an intake port 63 and an air outlet (a first air outlet 61 and a second air outlet 62), a control portion 69, a filter portion (a first filter portion 67a), a detection portion 48, and a water receiving portion 82, etc., similarly to the hand drying device 200.

[0174] The exhaust port 64c exhausts the air in the drying space SP sucked from the suction port 63 to the outside of the drying space SP. For example, the exhaust port 64c is an opening provided on the outer surface 50j of the frame 50, and is exposed on the outer surface 50j. In this case, the exhaust port 64c exhausts the air to the outside of the hand drying device 203, that is, to the outside of the frame 50. The exhaust port 64c is, for example, provided on the bottom surface 95 of the outer surface 50j, opens downward, and exhausts the air downward. Thus, it is possible to prevent the exhaust port 64c from exhausting air toward the user. However, the exhaust port 64c may also be provided on the back surface 92, the right side surface 93, or the left side surface 94 of the outer surface 50j, so that the air can be exhausted to the rear or side.

[0175] The external air intake port 66 inhales air from outside the drying space SP. For example, the external air intake port 66 is an opening provided on the outer surface 50j of the frame 50, and is exposed on the outer surface 50j. In this case, the external air intake port 66 inhales air from the outside of the hand drying device 203, that is, the outside of the frame 50. For example, the external air intake port 66 is provided on the bottom surface 95 of the outer surface 50j, opens downward, and inhales air downward. However, the external air intake port 66 may also be provided on the front surface 91, the back surface 92, the right side surface 93, or the left side surface 94 of the outer surface 50j.

[0176] The flow path portion 70c connects the suction port 63 and the discharge port 64c. In this example, the flow path portion 70c extends downward from the suction port 63 to the discharge port 64c. The air sucked from the suction port 63 is discharged from the discharge port 64 through the flow path portion 70c.

[0177] The flow path portion 70d connects the external air intake port 66 with the blow-out port (the first blow-out port 61 and the second blow-out port 62). The flow path portion 70d has a flow path 72a connected to the first blow-out port 61, and a flow path 72b connected to the second blow-out port 62. In this example, the flow path portion 70d extends upward from the external air intake port 66 and branches into the flow path 72a and the flow path 72b. The air inhaled from the external air intake port 66 is blown out from the blow-out port (the first blow-out port 61 and the second blow-out port 62) into the drying space SP via the flow path portion 70d.

[0178] The flow path portion 70c is a flow path different from the flow path portion 70d. That is, the flow path portion 70c and the flow path portion 70d are separated and independent from each other. The flow path portion 70c does not merge with the flow path portion 70d. The flow path portion 70c does not share a part of the flow path with the flow path portion 70d.

[0179] It should be noted that, in this example, the third flow path 73 and the discharge port 64 are not provided. However, the third flow path 73 and the discharge port 64 may be provided as required.

[0180] The air supply unit 65d is provided in the flow path unit 70c and causes the air to be sucked into the air inlet 63. The air supply unit 65e is provided in the flow path unit 70d and causes the air to be sucked into the external air inlet 66. The air supply unit 65d and the air supply unit 65e are air supply fans each having a motor.

[0181] If the air supply unit 65d is driven, wind is generated in the flow path unit 70c. As a result, air in the drying space SP is sucked in from the suction port 63. The air sucked in from the suction port 63 flows downward in the flow path unit 70c and is discharged to the outside from the discharge port 64c. On the other hand, if the air supply unit 65e is driven, wind is generated in the flow path unit 70d. As a result, external air is sucked in from the external air suction port 66. The air sucked in from the external air suction port 66 flows upward in the flow path unit 70d, and is blown out from the first blowing port 61 into the drying space SP via the flow path 72a or is blown out from the second blowing port 62 into the drying space SP via the flow path 72b.

[0182] In a hand drying device that discharges air sucked from the outside to the outside through a suction port in a drying space, there is also a risk that the air blown into the drying space is not sufficiently sucked into the suction port and leaks out from the opening for inserting the hand. In response to this, in the hand drying device 203, the air supply unit 65d and the air supply unit 65e operate in such a manner that the air volume sucked from the suction port 63 is greater than the air volume blown out from the blowout port.

[0183] In this way, the air in the drying space SP is sucked in through the suction port 63. Thus, it is possible to prevent the air in the drying space SP from leaking out of the opening during the drying of the hands, thereby improving the convenience of use. In addition, the air volume sucked in from the suction port 63 can be made greater than the air volume blown out from the blowout port, thereby further preventing the air in the drying space SP from leaking out of the opening for inserting the hands.

[0184] For example, Fig.16 As shown, when the flow path portion 70d is not provided with the third flow path 73 and the exhaust port 64, the air volume of the air supply portion 65e can be used as the "air volume of the air blown out from the outlet". In addition, for example, the air volume of the air supply portion 65d can be used as the air volume of the air sucked from the suction port 63.

[0185] For example, the air supply unit 65d and the air supply unit 65e operate in such a manner that the output of the air supply unit 65d is greater than the output of the air supply unit 65e. The control unit 69 performs control to make the output of the motor of the air supply fan of the air supply unit 65d greater than the output of the motor of the air supply fan of the air supply unit 65e. In this way, by operating the air supply unit 65d with a larger output than the air supply unit 65e, the air volume of the air sucked from the suction port can be greater than the air volume of the air blown out from the blow-out port. In this way, it is possible to further suppress the air in the drying space from leaking out of the opening for inserting the hand.

[0186] The respective driving of the air supply unit 65d and the air supply unit 65e is controlled by the control unit 69. If the user inserts a wet hand into the drying space SP from the opening, the detection unit 48 detects the hand. If the detection unit 48 detects the hand, a signal is sent from the detection unit 48 to the control unit 69. If the control unit 69 receives the signal, it executes the control to drive the air supply unit 65d. Thereafter, after a prescribed time has passed since the start of the driving of the air supply unit 65d, the control to drive the air supply unit 65e is executed. That is, if the detection unit 48 detects the hand, the air supply unit 65d is driven, and then the air supply unit 65e is driven later. By driving the air supply unit 65d before the air supply unit 65e, it is possible to further suppress the leakage of air in the drying space SP from the opening. It should be noted that the above-mentioned prescribed time for driving the air supply unit 65e later is, for example, about 0.01 seconds or more and about 2.0 seconds or less, but it is not particularly limited and can be specified as appropriate.

[0187] If the wet hand is moved out of the drying space SP from the opening, the detection unit 48 cannot detect the hand. At this time, the control unit 69 executes the control to stop the drive of the air supply unit 65e. Thereafter, after a prescribed time has passed since the drive of the air supply unit 65e was stopped, the control to stop the drive of the air supply unit 65d is executed. That is, if the detection unit 48 cannot detect the hand, the drive of the air supply unit 65e is stopped, and then the drive of the air supply unit 65d is stopped later. By stopping the drive of the air supply unit 65e before the drive of the air supply unit 65d, it is possible to reliably suppress the air in the drying space SP from leaking out of the opening. It should be noted that the above-mentioned prescribed time for stopping the drive of the air supply unit 65d later is, for example, about 0.01 seconds or more and about 2.0 seconds or less, but it is not particularly limited and can be specified as appropriate.

[0188] During the period when the air supply unit 65e is driven, the air supply unit 65d is driven. That is, the control unit 69 performs control to drive the air supply unit 65d during the period when the air supply unit 65e is driven. Thus, it is possible to reliably suppress the air in the drying space from leaking out from the opening. That is, during the period when the air is blown out from the blow-out port into the drying space SP, it becomes easy to suck the air in the drying space SP from the suction port 63, so it is possible to further suppress the air in the drying space SP from leaking out from the opening.

[0189] like Fig.16 As shown in FIG. 1 , the first filter 67a is provided upstream of the air supply unit 65e on the flow path 70d. The first filter 67a can make the air blown out from the blow-out port into the drying space SP cleaner.

[0190] The hand drying device 203 may further include a filter 67d. The filter 67d is provided in the flow path 70c and is located upstream or downstream of the air supply unit 65d. By providing the filter 67d, the air discharged from the discharge port 64c can be made cleaner.

[0191] As described above, in order to achieve high-speed drying, it is preferred that the blow-out port blows out air at a high speed. Specifically, for example, when the air supply unit for conveying air to the blow-out port is driven, the wind speed of the air blown out of each blow-out port (each of the first blow-out port 2a, the second blow-out port 4a, the first blow-out port 61 and the second blow-out port 62) is 90 m / s (meters per second) or more, preferably 92 m / s or more. In addition, when the air supply unit for conveying air to the blow-out port is driven, the air volume of the air blown out from the blow-out port (the sum of the air volumes of the air blown out from each first blow-out port 2a and each second blow-out port 4a, or the sum of the air volumes of the air blown out from each first blow-out port 61 and each second blow-out port 62) is 2.0 m 3 / h (cubic meters per hour) or more, preferably 2.2m 3 / h or more. Thus, high-speed drying that can dry the user's hands in about 10 seconds can be achieved. However, in a hand drying device that can dry at high speed and blow out air at high speed, since a large amount of air is blown out forcefully from the blow-out port, the air coming out of the blow-out port may not be fully sucked into the suction port in the drying space and leak out from the opening for hand insertion. For example, if the wind is strong, the wind that collides with the user's hands, etc., is likely to spread to the surroundings, so it may not be sucked into the suction port and leak out from the opening for hand insertion. In response to this, according to the hand drying devices 100, 200 to 203 involved in the embodiments, as described above, the possibility that the air coming out of the blow-out port leaks out from the opening for hand insertion instead of the suction port can be further reduced. It should be noted that the comparison of air volume (or output) can be, for example, a comparison of at least a portion of the state excluding the transition state of the air volume (or output) such as just after the start of driving of each air supply unit.

[0192] As described above, according to the embodiment, a hand dryer capable of improving quality can be provided.

[0193] One aspect of an embodiment of the present invention relates to a hand drying device for drying a user's hands.

[0194] An object of one aspect of an embodiment of the present invention is to provide a hand drying device that reduces the possibility that air discharged from a blow-out port leaks out from an opening for inserting hands instead of from an inlet.

[0195] A first form of an embodiment of the present invention is a hand drying device, characterized in that it comprises: a wall portion, which has a first wall portion and a second wall portion, the first wall portion is formed with a first blow-out port, the second wall portion is arranged opposite to the first wall portion, and a drying space is formed between the second wall portion and the first wall portion, the drying space having an opening for placing wet hands; a bottom portion, which is connected to the first wall portion and the second wall portion and forms the bottom of the drying space; an air supply portion, which is used to suck air into the drying space from an inlet formed in the wall portion or the bottom portion, and spray the air from the first blow-out port into the drying space. ; a flow path portion, which is provided with the air supply portion for the air sucked in from the suction port to flow; and a filter portion, which is provided in the flow path portion, the flow path portion having: an intake flow path, which is connected to the suction port, for the air sucked in from the suction port to flow in; a circulation flow path, which is connected to the intake flow path and the first blow-out port, for sending the air flowing in from the intake flow path to the first blow-out port; and an exhaust flow path, which is connected to the intake flow path and an exhaust port formed outside the drying space, for generating a negative pressure in the drying space by sending a part of the air flowing in from the intake flow path to the exhaust port.

[0196] According to the hand drying device, by having a flow path portion including a circulation flow path for sending air flowing in from the intake flow path to the first blow-out port and an exhaust flow path for sending a part of the air flowing in from the intake flow path to the exhaust port to generate a negative pressure in the drying space, it is possible to suppress the air ejected from the first blow-out port from leaking out from the opening for inserting hands in the drying space, thereby making it easier for the air to be sucked in from the intake port formed in the drying space and easier to circulate.

[0197] Therefore, when bacteria, viruses, etc. adhere to the user's hands, the air that hits the user's hands from the first air outlet can suppress the bacteria and viruses from being discharged outside the hand dryer.

[0198] A second aspect of the embodiment of the present invention is based on the first aspect of the embodiment of the present invention, and is characterized in that the circulation flow path is configured so that the flow path cross-sectional area is larger than the flow path cross-sectional area of ​​the discharge flow path.

[0199] According to the hand drying device, by constructing the circulation flow path so that the flow path cross-sectional area is larger than the flow path cross-sectional area of ​​the exhaust flow path, it is possible to allow a portion of the air to flow to the exhaust flow path to ensure the required minimum negative pressure in the drying space, while allowing most of the air sucked in from the suction port to easily flow into the circulation flow path.

[0200] The third form of the embodiment of the present invention is based on the first or second form of the embodiment of the present invention, and is characterized in that the air supply section comprises: a first air supply section, which is arranged in the suction flow path, and is used to suck air into the drying space from the suction port formed in the wall portion or the bottom; and a second air supply section, which is arranged in the circulation flow path more upstream than the exhaust flow path, and is used to spray air from the first blowing outlet.

[0201] According to the hand drying device, by providing a first air supply unit in the suction flow path and providing a second air supply unit in the circulation flow path more upstream than the exhaust flow path, it is possible to allow a portion of the air to flow to the exhaust flow path to ensure the minimum negative pressure required in the drying space, while allowing most of the air sucked in from the suction port to easily flow into the circulation flow path.

[0202] The fourth form of the embodiment of the present invention is based on the third form of the embodiment of the present invention, and is characterized in that the hand drying device also includes: a detection unit, which detects the user's hand; and a control unit, which performs drive control of the first air supply unit and the second air supply unit based on the detection result of the detection unit, and the control unit performs the following control: when the detection unit detects the user's hand, the first air supply unit is driven, and after a specified time has passed since the first air supply unit was driven, the second air supply unit is driven.

[0203] According to the hand drying device, after the drying space is subjected to negative pressure by driving the first air supply unit, the hand drying action begins by driving the second air supply unit. Therefore, the air in the drying space can be blown out from the first blowing outlet by driving the second air supply unit while reliably suppressing the air in the drying space from leaking out from the opening.

[0204] The fifth form of the embodiment of the present invention is based on the fourth form of the embodiment of the present invention, and is characterized in that the control unit performs the following control: when the detection unit cannot detect the user's hand, the second air supply unit stops driving, and after a specified time has passed since the second air supply unit stops driving, the first air supply unit stops driving.

[0205] According to this hand drying device, when the drying space is under negative pressure due to driving of the first blower, the second blower is stopped before the first blower, thereby reliably preventing air in the drying space D from leaking out of the opening.

[0206] The sixth form of the embodiment of the present invention is based on any one of the first to fifth forms of the embodiment of the present invention, and is characterized in that the intake flow path has a water receiving portion for collecting water droplets attached to the user's hand, and the filter portion is arranged on the intake flow path on the upstream side of the discharge flow path and on the downstream side of the water receiving portion.

[0207] According to the hand drying device, by arranging the filter in the suction flow path, dust etc. can be efficiently captured before the air from the suction port flows into the circulation flow path and the discharge flow path. On this basis, by arranging the filter further downstream than the water receiving part, the situation that the filter mesh is blocked by water droplets etc. can be suppressed.

[0208] A seventh aspect of the embodiment of the present invention is based on the sixth aspect of the embodiment of the present invention, and is characterized in that the filter unit includes a HEPA filter.

[0209] According to this hand dryer, bacteria and the like can be efficiently captured before the air from the air inlet flows into the circulation flow path and the exhaust flow path.

[0210] An eighth aspect of the present invention is based on any one of the first to seventh aspects of the present invention, and is characterized in that the flow path portion further includes an intake flow path connected to an intake port for taking in air from the outside and the circulation flow path.

[0211] According to this hand drying device, while ensuring the minimum negative pressure required in the drying space by allowing part of the air to flow to the exhaust flow path, the amount of air blown out from the first blow outlet is ensured through the intake port and the intake flow path, so that the user's hands can be fully dried.

[0212] The ninth form of the embodiment of the present invention is based on the third form of the embodiment of the present invention, and is characterized in that the first air supply unit and the second air supply unit operate in a manner that the volume of air sucked in from the suction port is greater than the volume of air blown out from the blowing port, and the blowing port includes the first blowing port, which blows the air sucked in from the drying space into the drying space.

[0213] According to this hand drying device, the volume of air sucked from the suction port can be made larger than the volume of air blown out from the blow-out port, thereby further suppressing leakage of air in the drying space from the opening.

[0214] A tenth aspect of the embodiment of the present invention is based on the ninth aspect of the embodiment of the present invention, and is characterized in that the first air supply unit and the second air supply unit operate in such a manner that an output of the first air supply unit is greater than an output of the second air supply unit.

[0215] According to the hand drying device, the first air supply unit operates with a larger output than the second air supply unit, so that the volume of air sucked in from the suction port can be greater than the volume of air blown out from the blowout port, thereby further suppressing the air in the drying space from leaking out of the opening.

[0216] An eleventh aspect of the present invention is any one of the first to tenth aspects of the present invention, wherein the filter unit is located upstream of the discharge port on the flow path unit.

[0217] According to this hand dryer, since the filter unit is located upstream of the discharge port, the air discharged from the discharge port can be cleaned.

[0218] The twelfth form of an embodiment of the present invention is a hand drying device, characterized in that it comprises: a frame having an inner surface and an opening, the opening being used for a user to insert a hand into a drying space surrounded by the inner surface; an intake port, which is arranged on the inner surface and sucks air in the drying space; a blow-out port, which is arranged on the inner surface and blows air into the drying space; a flow path portion, which connects the intake port and the blow-out port; an air supply portion, which is arranged on the flow path portion, so that the intake port inhales air and at least a portion of the air inhaled by the intake port is blown out from the blow-out port via the flow path portion; and an exhaust port, which discharges a portion of the air inhaled from the intake port from the flow path portion.

[0219] According to the hand drying device, it is possible to prevent the air in the drying space from leaking out of the opening during the hand drying process. By providing an exhaust port, an amount of air equal to the exhausted air can be sucked into the drying space from outside the drying space through the opening, thereby further preventing the air in the drying space from leaking out of the opening, and improving the convenience of use.

[0220] The thirteenth form of the embodiment of the present invention is a hand drying device, characterized in that it comprises: a frame having an inner surface and an opening, the opening being used for a user to insert a hand into a drying space surrounded by the inner surface; a first suction port and a second suction port, which are arranged on the inner surface and inhale air in the drying space; a blow outlet, which is arranged on the inner surface and blows air into the drying space; an exhaust port, which exhausts the air sucked in from the second suction port; a first flow path portion, which connects the first suction port with the blow outlet; a second flow path portion, which connects the second suction port with the exhaust port; and a first air supply portion, which is used to allow the first suction port to inhale air, the second flow path portion being a flow path different from the first flow path portion.

[0221] According to the hand drying device, it is possible to prevent the air in the drying space from leaking out of the opening during the drying of the hands, thereby improving the convenience of use. In addition, by discharging the air sucked from the second suction port to the outside of the drying space from the discharge port, the air volume sucked from the first suction port and the second suction port can be made greater than the air volume blown out from the blow port, thereby further preventing the air in the drying space from leaking out of the opening for inserting the hands.

[0222] A fourteenth aspect of the embodiment of the present invention is based on the thirteenth aspect of the embodiment of the present invention, and is characterized in that the hand dryer further includes a second air supply unit for causing the second air intake port to suck air.

[0223] According to the hand drying device, by providing the second air supply unit, the air volume of the air sucked from the first suction port and the second suction port can be increased, and leakage of the air in the drying space from the opening for inserting the hands can be further suppressed.

[0224] A fifteenth aspect of the embodiment of the present invention is based on the fourteenth aspect of the embodiment of the present invention, and is characterized in that the hand drying device further comprises:

[0225] a detection portion that detects a user's hand; and

[0226] a control unit that performs drive control of the first air supply unit and the second air supply unit based on the detection result of the detection unit,

[0227] The control unit performs control such that when the detection unit detects the hand of the user, the second air supply unit is driven, and after a predetermined time has passed since the second air supply unit was driven, the first air supply unit is driven.

[0228] According to this hand dryer, since the second air blower is driven earlier than the first air blower, exhaust driving of the air in the drying space can be started before blowing out the air, and thus leakage of the air in the drying space from the opening can be further suppressed.

[0229] The sixteenth form of the embodiment of the present invention is based on the fifteenth form of the embodiment of the present invention, and is characterized in that the control unit performs the following control: when the detection unit cannot detect the user's hand, the first air supply unit stops driving, and after a specified time has passed since the first air supply unit stops driving, the second air supply unit stops driving.

[0230] According to the hand drying device, by stopping the drive of the first air supply unit before the drive of the second air supply unit, the air in the drying space can be continuously sucked in for a predetermined time after the blowing drive stops, thereby reliably preventing the air in the drying space from leaking out of the opening.

[0231] The seventeenth form of an embodiment of the present invention is a hand drying device, characterized in that it comprises: a frame having an inner surface and an opening, the opening being used for a user to insert a hand into a drying space surrounded by the inner surface; an intake port, which inhales air in the drying space; an exhaust port, which exhausts the air inhaled from the intake port; a blow-out port, which is arranged on the inner surface and blows air into the drying space; an external air intake port, which inhales air from outside the drying space; a first flow path portion, which connects the intake port with the exhaust port; a second flow path portion, which connects the blow-out port with the external air intake port; a first air supply portion, which is used to allow the intake port to inhale air; and a second air supply portion, which is used to allow the external air intake port to inhale air, the first air supply portion and the second air supply portion operating in such a manner that the volume of air inhaled from the intake port is greater than the volume of air blown out from the blow-out port.

[0232] According to the hand drying device, the air in the drying space can be prevented from leaking out of the opening during the hand drying process, thereby improving the convenience of use. In addition, the air volume sucked in from the suction port can be made greater than the air volume blown out from the blowing port, thereby further preventing the air in the drying space from leaking out of the opening for the user to insert the hand.

[0233] The eighteenth aspect of the embodiment of the present invention is based on the seventeenth aspect of the embodiment of the present invention, and is characterized in that the first air supply unit and the second air supply unit operate in a manner such that an output of the first air supply unit is greater than an output of the second air supply unit.

[0234] According to the hand drying device, the first air supply unit operates with a larger output than the second air supply unit, so that the volume of air sucked in from the suction port can be greater than the volume of air blown out from the blowout port, thereby further suppressing the air in the drying space from leaking out of the opening.

[0235] The nineteenth form of the embodiment of the present invention is based on the seventeenth or eighteenth form of the embodiment of the present invention, and is characterized in that the hand drying device also includes: a detection unit, which detects the user's hand; and a control unit, which performs drive control of the first air supply unit and the second air supply unit based on the detection result of the detection unit, and the control unit performs the following control: when the detection unit detects the user's hand, the first air supply unit is driven, and after a specified time has passed since the first air supply unit was driven, the second air supply unit is driven.

[0236] According to this hand dryer, by driving the first air blower earlier than the second air blower, exhaust driving of the air in the drying space can be started before blowing out, so leakage of the air in the drying space from the opening can be further suppressed.

[0237] The twentieth form of the embodiment of the present invention is based on the nineteenth form of the embodiment of the present invention, and is characterized in that the control unit performs the following control: when the detection unit cannot detect the user's hand, the second air supply unit is stopped, and after a specified time has passed since the second air supply unit stopped, the first air supply unit is stopped.

[0238] According to the hand drying device, by stopping the drive of the second air supply unit before the drive of the first air supply unit, the air in the drying space can continue to be sucked in for a specified time even after the blowing drive is stopped, thereby reliably preventing the air in the drying space from leaking from the opening.

[0239] According to one aspect of the embodiment of the present invention, it is possible to provide a hand dryer in which the possibility of air discharged from the blow-off port leaking out from the opening for inserting hands instead of the suction port is reduced.

[0240] Although the embodiments of the present invention have been described above, the present invention is not limited to these descriptions.

[0241] Although the suction port 10 is provided in the bottom portion 8 in the embodiment of the present invention, it may be provided in the first wall portion 2 or the second wall portion 4, for example.

[0242] For the above embodiments, those skilled in the art may make design changes as appropriate, as long as they have the features of the present invention, and they are also included in the scope of the present invention. For example, the shape, size, material, and configuration of each element of the hand drying device 100, 200-203 are not limited to the examples and can be changed as appropriate.

[0243] In addition, the elements included in the above-mentioned embodiments can be combined as long as they are technically feasible, and the products of the combination of the elements are included in the scope of the present invention as long as they include the characteristics of the present invention.

Claims

1. A hand drying device, characterized in that: have: The wall portion includes a first wall portion and a second wall portion, the first wall portion is formed with a first blow-out port, the second wall portion is arranged opposite to the first wall portion and forms a drying space between the second wall portion and the first wall portion, the drying space having an opening for placing wet hands; a bottom portion connected to the first wall portion and the second wall portion and forming the bottom of the drying space; an air supply unit, which is used to suck air from the drying space through a suction port formed on the wall portion or the bottom portion, and eject the air from the first blowing port into the drying space; a flow path portion provided with the air supply portion and through which the air sucked in from the suction port flows; and a filter unit disposed in the flow path unit, The flow path portion has: an inlet flow path connected to the inlet port and allowing the air inhaled from the inlet port to flow in; a circulation flow path connected to the suction flow path and the first blow-out port, and sending the air flowing in from the suction flow path to the first blow-out port; as well as an exhaust flow path connected to the suction flow path and an exhaust port formed outside the drying space, and generating negative pressure in the drying space by sending part of the air flowing in from the suction flow path to the exhaust port, The air supply unit comprises: a first air supply unit, which is arranged in the suction flow path and is used to suck air from the drying space from a suction port formed in the wall portion or the bottom; and a second air supply unit, which is provided in the circulation flow path on the upstream side of the exhaust flow path and is used to eject air from the first blowing outlet, The circulation flow path is configured such that the flow path cross-sectional area is larger than the flow path cross-sectional area of ​​the discharge flow path. The air volume of the air blown out from the first blowing outlet is greater than the air volume of the air discharged from the discharge outlet. The hand drying device further comprises: a detection unit that detects a hand of a user; and a control unit that performs drive control of the first air supply unit and the second air supply unit based on the detection result of the detection unit, The control unit performs control such that when the detection unit detects the hand of the user, the first air supply unit is driven, and after a predetermined time has passed since the first air supply unit was driven, the second air supply unit is driven.

2. The hand drying device according to claim 1, characterized in that: The control unit performs control such that when the detection unit cannot detect the hand of the user, the second air supply unit stops driving, and after a predetermined time has passed since the second air supply unit stops driving, the first air supply unit stops driving.

3. The hand drying device according to claim 1, characterized in that: The suction flow path has a water receiving portion for collecting water drops attached to the user's hand. The filter unit is provided on the downstream side of the water receiving unit.

4. The hand drying device according to claim 3, characterized in that: The filter unit includes a HEPA filter.

5. The hand drying device according to claim 1, characterized in that: The flow path portion further includes an intake flow path formed outside the drying space and connected to an intake port for taking in air from the outside and the circulation flow path. The intake port is provided downstream of the discharge port.

6. The hand drying device according to claim 1, characterized in that: The first air supply unit and the second air supply unit operate in such a manner that the volume of air sucked in from the suction port is greater than the volume of air blown out from the blowout port. The blowing outlet includes the first blowing outlet and blows the air sucked from the drying space into the drying space.

7. The hand drying device according to claim 6, characterized in that: The first air supply unit and the second air supply unit operate in such a manner that an output of the first air supply unit is greater than an output of the second air supply unit.

8. The hand drying device according to claim 1, characterized in that: The filter unit is located upstream of the discharge port and is arranged in the suction flow path of the flow path unit.

9. A hand drying device, characterized in that: have: A frame having an inner surface and an opening, wherein the opening is used for a user to insert a hand into a drying space surrounded by the inner surface; A first suction port and a second suction port are provided on the inner surface to suck the air in the drying space; a blow-out port, which is disposed on the inner surface and blows air into the drying space; an exhaust port for exhausting the air sucked from the second suction port; a first flow path portion connecting the first suction port and the blow-out port; a second flow path portion connecting the second suction port and the discharge port; a first air supply unit, configured to allow the first suction port to suck in air; a second air supply unit, the second air supply unit being used to allow the second suction port to suck in air; a detection unit that detects a hand of a user; as well as a control unit that performs drive control of the first air supply unit and the second air supply unit based on the detection result of the detection unit, The second flow path portion is a flow path different from the first flow path portion, The control unit performs control such that when the detection unit detects the hand of the user, the second air supply unit is driven, and after a predetermined time has passed since the second air supply unit was driven, the first air supply unit is driven.

10. The hand drying device according to claim 9, characterized in that: The control unit performs control such that when the detection unit cannot detect the hand of the user, the first air supply unit stops driving, and after a predetermined time has passed since the first air supply unit stopped driving, the second air supply unit stops driving.

11. A hand drying device, characterized in that: have: A frame having an inner surface and an opening, wherein the opening is used for a user to insert a hand into a drying space surrounded by the inner surface; A suction port for sucking air from the drying space; an exhaust port for exhausting the air sucked from the suction port; a blow-out port, which is disposed on the inner surface and blows air into the drying space; an external air intake port for sucking air from outside the drying space; a first flow path portion connecting the suction port and the discharge port; a second flow path portion connecting the blow-out port and the external air inlet; a first air supply unit, which is used to allow the suction port to suck in air; as well as a second air supply unit, which is used to allow the external air intake port to inhale air, The first air supply unit and the second air supply unit operate in such a manner that the volume of air sucked in from the suction port is greater than the volume of air blown out from the blowing port. The first air supply unit and the second air supply unit operate in such a manner that an output of the first air supply unit is greater than an output of the second air supply unit.

12. The hand drying device according to claim 11, characterized in that: The hand drying device further comprises: a detection portion that detects a user's hand; and a control unit that performs drive control of the first air supply unit and the second air supply unit based on the detection result of the detection unit, The control unit performs control such that when the detection unit detects the hand of the user, the first air supply unit is driven, and after a predetermined time has passed since the first air supply unit was driven, the second air supply unit is driven.

13. The hand drying device according to claim 12, characterized in that: The control unit performs control such that the second air blowing unit stops when the detection unit cannot detect the hand of the user, and the first air blowing unit stops after a predetermined time has passed since the second air blowing unit stopped.

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