Hand drying device

Abstract

To provide a hand dryer that reduces the possibility that air coming out of an outlet leaks from an opening into which hands are inserted, instead of an inlet. [Solution] The flow path section has an intake flow path connected to the intake port and into which air sucked in from the intake port flows, a circulation flow path connected to the intake flow path and the first outlet and sending the air flowing in from the intake flow path to the first outlet, and an exhaust flow path connected to the intake flow path and an outlet formed outside the drying space and sending a portion of the air flowing in from the intake flow path to the outlet, thereby generating negative pressure in the drying space.

Description

【Technical Field】 【0001】 Aspects of the present invention relate to a hand drying device for drying a user's hand. 【Background Art】 【0002】 There is known a hand drying device capable of discharging air sucked in from a suction port toward a user's hand from a blowout port. 【0003】 In such a general hand drying device, when bacteria, viruses, etc. adhere to the user's hand, there is a possibility that these bacteria and viruses are discharged outside the hand drying device by the air colliding with the user's hand from the blowout port. In order to prevent such a problem, the applicant considered a hand drying device in which a suction port is provided in a drying space where a blowout port is installed, so that the air blown out from the blowout port is sucked into the suction port provided in the drying space. Such a hand drying device is known, for example, as in Patent Document 1. However, in such a hand drying device, there is a possibility that the air coming out of the blowout port is not sufficiently sucked in from the suction port in the drying space and leaks out through the opening where the hand is inserted. 【Prior Art Documents】 【Patent Documents】 【0004】 【Patent Document 1】 Japanese Patent Application Laid-Open No. 2001-299636 【Summary of the Invention】 【Problems to be Solved by the Invention】 【0005】 The present invention has been made based on the recognition of such problems, and an object thereof is to provide a hand drying device in which the possibility that the air coming out of the blowout port leaks out through the opening where the hand is inserted instead of the suction port is reduced. 【Means for Solving the Problems】 【0006】 The first invention comprises a wall portion having a first wall portion having a first outlet formed thereon, a second wall portion facing the first wall portion and forming a drying space between itself and the first wall portion having an opening for inserting wet hands, a bottom portion connected to the first wall portion and the second wall portion and forming the bottom of the drying space, a blower portion for drawing in air from the drying space through an intake port formed in the wall portion or the bottom portion and discharging the air into the drying space through the first outlet, a flow path portion on which the blower portion is installed and through which the air drawn in from the intake port flows, and the flow path The hand drying device comprises a filter section provided in the section, and the flow path section is characterized by having a suction flow path connected to the suction port through which air sucked in from the suction port flows in, a circulation flow path connected to the suction flow path and the first outlet port and which sends the air flowed in from the suction flow path to the first outlet port, and a discharge flow path connected to the suction flow path and an outlet formed outside the drying space and which generates negative pressure in the drying space by sending a portion of the air flowed in from the suction flow path to the outlet port. 【0007】 This hand drying device includes a flow path section having a circulation flow path that sends air flowing in from the intake flow path to the first outlet, and an outlet flow path that sends a portion of the air flowing in from the intake flow path to the outlet, thereby generating negative pressure in the drying space. This prevents the air discharged from the first outlet from leaking out through the opening for inserting hands in the drying space, making it easier to draw in the air from the intake opening formed in the drying space and facilitating circulation. Therefore, if bacteria or viruses are present on the user's hands, the air that hits the user's hands from the first outlet can prevent these bacteria or viruses from being expelled outside the hand drying device. 【0008】 The second invention is a hand drying device characterized in that, in the first invention, the circulation channel is configured such that the cross-sectional area of ​​the channel is larger than that of the discharge channel. 【0009】 In this manual drying device, the circulation channel is configured to have a larger cross-sectional area than the discharge channel. This allows for the minimum necessary negative pressure within the drying space to be maintained by directing some of the air to the discharge channel, while facilitating the flow of most of the air drawn in from the intake port into the circulation channel. 【0010】 The third invention is a hand drying device characterized in that, in the first or second invention, the blowing unit comprises a first blowing unit provided in the suction passage for drawing in air from the drying space through a suction port formed in the wall or the bottom, and a second blowing unit provided in the circulation passage located upstream of the discharge passage for discharging air from the first outlet. 【0011】 According to this hand drying device, by providing a first air blower in the suction channel and a second air blower in the circulation channel located upstream of the discharge channel, it is possible to ensure the minimum necessary negative pressure in the drying space by directing some of the air to the discharge channel, while also facilitating the flow of most of the air drawn in from the suction port into the circulation channel. 【0012】 The fourth invention is a hand drying device that, in the third invention, further comprises a detection unit for detecting the user's hand, and a control unit that performs drive control of the first air blower and the second air blower based on the detection result of the detection unit, wherein the control unit drives the first air blower when the detection unit detects the user's hand, and drives the second air blower after a predetermined time has elapsed since the first air blower was driven. 【0013】 With this hand drying device, the drying space is first pressurized by the first air blower, and then the drying process begins when the second air blower is driven. This effectively prevents air from leaking out of the opening in the drying space, while still allowing it to be blown out from the first outlet by the second air blower. 【0014】 The fifth invention is a hand drying device in which, in the fourth invention, the control unit stops driving the second air blower when the detection unit stops detecting the user's hand, and stops driving the first air blower after a predetermined time has elapsed since the second air blower stopped. 【0015】 With this hand-drying device, by creating negative pressure in the drying space by driving the first air blower, and then stopping the driving of the second air blower before the driving of the first air blower, it is possible to effectively suppress the leakage of air from the drying space D through the opening. 【0016】 The sixth invention is a hand drying device characterized in that, in any of the first to fifth inventions, the suction channel has a water receiving section for collecting water droplets adhering to the user's hands, and the filter section is provided downstream of the water receiving section in the suction channel, which is upstream of the discharge channel. 【0017】 With this hand drying device, the filter is installed in the intake channel, allowing dust and other particles to be efficiently collected before the air from the intake flows into the circulation and discharge channels. Furthermore, by installing the filter downstream of the water receiving section, clogging of the filter by water droplets and other particles can be prevented. 【0018】 The seventh invention is a hand drying device, characterized in that, in the sixth invention, the filter section has a HEPA filter. 【0019】 This hand drying device allows for the efficient capture of bacteria and other microorganisms before the air from the intake flows into the circulation and discharge channels. 【0020】 The eighth invention is a hand drying device characterized in that, in any of the first to seventh inventions, the flow channel section further comprises an intake port for taking in air from the outside and an intake channel connected to a circulation channel. 【0021】 According to this hand dryer, while ensuring the minimum necessary negative pressure in the drying space by allowing some air to flow into the discharge passage, the amount of air blown out from the first outlet can be ensured from the intake and the intake passage, and the user's hand can be dried thoroughly. 【0022】 A ninth invention is the hand dryer according to the third invention, wherein the first blower unit and the second blower unit operate such that the air volume of the air sucked in from the suction port is larger than the air volume of the air blown out from the blowout port, the blowout port includes the first blowout port, and the air sucked in from the drying space is blown out into the drying space. 【0023】 According to this hand dryer, the air volume of the air sucked in from the suction port can be made larger than the air volume of the air blown out from the blowout port, and leakage of the air in the drying space from the opening can be further suppressed. 【0024】 A tenth invention is the hand dryer according to the ninth invention, wherein the first blower unit and the second blower unit operate such that the output of the first blower unit is larger than the output of the second blower unit. 【0025】 According to this hand dryer, by operating the first blower unit with an output larger than that of the second blower unit, the air volume of the air sucked in from the suction port can be made larger than the air volume of the air blown out from the blowout port. Thereby, leakage of the air in the drying space from the opening can be further suppressed. 【0026】 An eleventh invention is the hand dryer according to any one of the first to tenth inventions, wherein the filter unit is located upstream of the discharge port in the flow path unit. 【0027】 According to this hand dryer, by positioning the filter unit upstream of the discharge port, the air discharged from the discharge port can be cleaned. 【0028】 The twelfth invention is a hand drying device characterized by comprising: a housing having an inner surface and an opening for a user to insert their hands into a drying space surrounded by the inner surface; an intake port provided on the inner surface for drawing in air from the drying space; an outlet port provided on the inner surface for blowing air into the drying space; a flow path section connecting the intake port and the outlet port; a blower section provided on the flow path section for drawing air into the intake port and blowing out at least a portion of the air drawn into the intake port through the flow path section from the outlet port; and an outlet for discharging a portion of the air drawn in from the intake port from the flow path section. 【0029】 This hand drying device prevents air from leaking out of the drying space through the opening while hands are drying. By providing an outlet, an amount of air equivalent to the amount of air discharged can be drawn into the drying space from outside through the opening, further suppressing air leakage from the drying space through the opening and improving ease of use. 【0030】 The 13th invention is a hand drying device comprising: a housing having an inner surface and an opening for a user to insert their hands into a drying space surrounded by the inner surface; a first intake port and a second intake port provided on the inner surface for drawing in air from the drying space; a discharge port provided on the inner surface for blowing air into the drying space; a discharge port for discharging air drawn in from the second intake port; a first flow path section connecting the first intake port and the discharge port; a second flow path section connecting the second intake port and the discharge port; and a first air blowing section for drawing air into the first intake port, wherein the second flow path section is a separate flow path from the first flow path section. 【0031】 This hand drying device can suppress the leakage of air from the drying space through the opening while hands are drying, thereby improving ease of use. Furthermore, since the air drawn in from the second intake port is exhausted outside the drying space through the exhaust port, the airflow volume drawn in from the first and second intake ports can be made greater than the airflow volume blown out from the outlet port, further suppressing the leakage of air from the drying space through the opening into which the hands are inserted. 【0032】 The fourteenth invention is a hand drying device characterized in that, in the thirteenth invention, it further comprises a second air blower for drawing air into the second intake port. 【0033】 With this hand drying device, by providing a second air blower, the amount of air drawn in from the first and second intake ports can be increased, and the leakage of air from the drying space through the opening into which the hands are inserted can be further suppressed. 【0034】 The 15th invention is a hand drying device that, in the 14th invention, further comprises a detection unit for detecting the user's hand, and a control unit that performs drive control of the first air blower and the second air blower based on the detection result of the detection unit, wherein the control unit drives the second air blower when the detection unit detects the user's hand, and drives the first air blower after a predetermined time has elapsed since the second air blower was driven. 【0035】 With this hand drying device, the second air blower is driven before the first air blower, allowing the discharge of air from the drying space to begin before the air is blown out. This further suppresses air leakage from the opening in the drying space. 【0036】 The sixteenth invention is a hand drying device in which, in the fifteenth invention, the control unit stops driving the first air blower when the detection unit stops detecting the user's hand, and stops driving the second air blower after a predetermined time has elapsed since the first air blower stopped. 【0037】 With this hand drying device, the first air blower stops operating before the second air blower, allowing air to be drawn into the drying space for a predetermined time even after the air blower stops. This effectively prevents air from leaking out of the opening. 【0038】 The 17th invention is a hand drying device comprising: a housing having an inner surface and an opening for a user to insert their hands into a drying space surrounded by the inner surface; an intake port for drawing in air from the drying space; an exhaust port for discharging the air drawn in from the intake port; an outlet provided on the inner surface for blowing air into the drying space; an outside air intake port for drawing in air from outside the drying space; a first flow path section connecting the intake port and the exhaust port; a second flow path section connecting the outlet port and the outside air intake port; a first blower section for drawing air into the intake port; and a second blower section for drawing air into the outside air intake port, wherein the first blower section and the second blower section operate such that the airflow rate of the air drawn in from the intake port is greater than the airflow rate of the air blown out from the outlet port. 【0039】 This hand drying device can suppress the leakage of air from the drying space through the opening while hands are drying, thereby improving ease of use. Furthermore, the airflow volume drawn in from the intake can be made greater than the airflow volume blown out from the outlet, further suppressing the leakage of air from the drying space through the opening into which the user places their hands. 【0040】 The 18th invention is a hand drying device in which, in the 17th invention, the first air blower and the second air blower operate such that the output of the first air blower is greater than the output of the second air blower. 【0041】 In this hand drying device, the first air blower operates with a greater output than the second air blower, making the volume of air drawn in from the intake greater than the volume of air blown out from the outlet. This further suppresses the leakage of air from the drying space through the opening. 【0042】 The 19th invention is a hand drying device that, in the case of the 17th or 18th invention, further comprises a detection unit for detecting a user's hand, and a control unit that performs drive control of the first air blower and the second air blower based on the detection result of the detection unit, wherein the control unit drives the first air blower when the detection unit detects a user's hand, and drives the second air blower after a predetermined time has elapsed since the first air blower was driven. 【0043】 With this hand-drying device, the first air blower is driven before the second air blower, allowing the discharge of air from the drying space to begin before the air is blown out. This further suppresses air leakage from the opening in the drying space. 【0044】 The 20th invention is a hand drying device in which, in the 19th invention, the control unit stops the second air blower when the detection unit stops detecting the user's hand, and stops the first air blower after a predetermined time has elapsed since the second air blower stopped. 【0045】 With this hand drying device, the drive of the second blower unit stops before the drive of the first blower unit, so that even after the blowing drive stops, the intake of air from the drying space can continue for a predetermined time, for example, and thus the leakage of air from the drying space through the opening can be effectively suppressed. [Effects of the Invention] 【0046】 According to an aspect of the present invention, it is possible to provide a hand drying device in which the possibility of air coming out of the outlet leaking out from the opening into which the hands are inserted, rather than from the intake, is reduced. [Brief explanation of the drawing] 【0047】 [Figure 1] This is a schematic perspective view showing a hand drying device according to an embodiment of the present invention. [Figure 2] Figure 1 is a schematic perspective view showing a hand drying device. [Figure 3] Figure 1 is a schematic cross-sectional perspective view showing a part of the hand drying apparatus. [Figure 4] Figure 1 is a schematic cross-sectional view showing the airflow of the hand drying device. [Figure 5] Figure 1 is a schematic block diagram showing the airflow of the hand drying device. [Figure 6] This is a schematic perspective view illustrating another hand drying device according to an embodiment of the present invention. [Figure 7] Figure 6(a) is a schematic cross-sectional view showing a hand drying device. [Figure 8] Figure 6(a) is a schematic cross-sectional view showing a hand drying device. [Figure 9] Figure 6(a) is a schematic diagram showing the airflow of the hand drying device. [Figure 10] Figure 6(a) is a schematic perspective view showing a part of the hand drying device. [Figure 11] Figure 10 is a schematic cross-sectional view showing a part of the hand drying apparatus. [Figure 12] Figure 6(a) is a schematic perspective view showing a part of the hand drying device. [Figure 13] Figure 6(a) is a schematic exploded view showing the hand drying device. [Figure 14] This is a schematic diagram showing the airflow of another hand drying device according to the embodiment. [Figure 15] This is a schematic diagram showing the airflow of another hand drying device according to the embodiment. [Figure 16] This is a schematic diagram showing the airflow of another hand drying device according to the embodiment. [Modes for carrying out the invention] 【0048】 Embodiments of the present invention will be described below with reference to the drawings. In each drawing, similar components are denoted by the same reference numerals, and detailed descriptions are omitted as appropriate. 【0049】 Figure 1 is a schematic perspective view showing a hand drying device according to an embodiment of the present invention. Figure 2 is a schematic perspective view showing the hand drying device of Figure 1. Figure 3 is a schematic cross-sectional perspective view showing a part of the hand drying device of Figure 1. As shown in Figures 1 and 2, the hand drying device 100 comprises a wall 6 having a first wall 2 with a plurality of first air outlets 2a formed thereon, and a second wall 4 (not shown) facing the first wall and having a plurality of second air outlets 4a (not shown) formed thereon, and a bottom 8 connected to the first wall 2 and the second wall 4 and forming the bottom of the drying space D. The second wall 4 forms a drying space D between itself and the first wall 2, having an opening at the top for inserting wet hands. 【0050】 The hand drying device 100 includes a blower unit 12 for drawing in air from the drying space D through an intake port 10 formed in the bottom 8 and discharging the air back into the drying space D through a first outlet port 2a, a flow path unit 14 on which the blower unit 12 is installed and through which the air drawn in from the intake port 10 flows, and a filter unit 16 provided in the flow path unit 14. 【0051】 The flow path section 14 includes a suction flow path 18 connected to the suction port 10, into which air drawn in from the suction port 10 flows; a circulation flow path 20 connected to the suction flow path 18 and the first outlet port 2a, which sends the air drawn in from the suction flow path 18 to the first outlet port 2a; and a discharge flow path 24 connected to the suction flow path 18 and the outlet port 22 formed outside the drying space D, which generates negative pressure in the drying space D by sending a portion of the air drawn in from the suction flow path 18 to the outlet port 22. The suction flow path 18 is longer than the circulation flow path 20 and longer than the discharge flow path 24. The circulation flow path 20 is also longer than the discharge flow path 24. The outlet port 22 is formed on the lower surface of the hand drying device 100. 【0052】 The air blower unit 12 includes a first air blower unit 26, which is a blower fan provided in the suction passage 18, and a second air blower unit 28, which is a blower fan provided in the circulation passage 20 located upstream of the discharge passage. By providing the first air blower unit 26 in the suction passage 18 and the second air blower unit 28 in the circulation passage 20 located upstream of the discharge passage 24, it is possible to ensure the minimum necessary negative pressure in the drying space D by flowing some of the air into the discharge passage 24, while also making it easier for most of the air drawn in from the suction port 10 to flow into the circulation passage 20. 【0053】 The suction channel 18 has a water receiving section 30 for collecting water droplets adhering to the user's hands. The water receiving section 30 is formed in a water receiving tray 32 that is detachable from the hand drying device body. The filter section 16 has a first filter section 34, a second filter section 36, and a third filter section 38. The first filter section 34 is located downstream of the water receiving section 30 in the suction channel 18, which is upstream of the discharge channel 24. By providing the first filter section 34 in the suction channel 18, dust and other particles can be efficiently collected before the air from the suction port 10 flows into the circulation channel 20 and the discharge channel 24. Furthermore, by installing the first filter section 34 downstream of the water receiving section 30, clogging of the first filter section 34 by water droplets and other particles can be suppressed. The second filter section 36 is a HEPA filter (High Efficiency Particulate Air Filter) capable of collecting bacteria and other particles, and is formed in the discharge channel 24. The third filter section 38 is a HEPA filter capable of capturing bacteria and other microorganisms, and is formed in the circulation channel 20. 【0054】 The circulation channel 20 is configured to have a larger cross-sectional area than the discharge channel 24. In other words, the pressure loss of the fluid flowing through the circulation channel 20 is smaller than the pressure loss of the fluid flowing through the discharge channel 24. This makes it possible to ensure the minimum necessary negative pressure in the drying space D by flowing some of the air into the discharge channel 24, while making it easier for most of the air drawn in from the intake port 10 to flow into the circulation channel 20. 【0055】 The flow path section 14 has an intake port 44 for taking in air from the outside and an intake flow path 46 connected to 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 into the drying space D from the first outlet port 2a and the second outlet port 4a. This ensures that the amount of air blown out from the first outlet port 2a and the second outlet port 4a is sufficient to ensure that the user's hands are thoroughly dried, while ensuring that the minimum necessary negative pressure in the drying space D is maintained by having some of the air flow into the discharge flow path 24. The intake port 44 is formed on the lower surface of the hand drying device and is positioned side by side with the discharge port 22. 【0056】 The hand drying device 100 includes a detection unit 40, which is a sensor provided on the first wall portion 2. The hand drying device 100 also includes a control unit 42 (see Figures 3 and 4) that controls the operation of the first air blower 26 and the second air blower 28 in response to signals from the detection unit 40. 【0057】 Figure 4 is a schematic cross-sectional view showing the airflow of the hand drying device shown in Figure 1. Figure 5 is a schematic block diagram showing the airflow of the hand drying device shown in Figure 1. The arrows shown in Figures 4 and 5 represent the airflow. 【0058】 When a user inserts a wet hand into the drying space D through the opening, the hand is detected by a detection unit 40 provided on the first wall 2. When the detection unit 40 detects a hand, a signal is transmitted from the detection unit 40 to the control unit 42. Upon receiving the signal, the control unit 42 executes a control to drive the first air blower 26. Subsequently, after a predetermined time has elapsed since the start of driving the first air blower 26, it executes a control to drive the second air blower 28. That is, when the detection unit 40 detects a hand, the first air blower 26 is driven, and then, with a delay, the second air blower 28 is driven. As a result, the drying operation of the hand begins after the drying space D is made negatively pressurized by the driving of the first air blower 26, and then by the driving of the second air blower 28. This effectively suppresses air leakage from the opening in the drying space D, while allowing air to be blown out from the first outlet 2a and the second outlet 4a by the driving of the second air blower 28. 【0059】 Furthermore, when a wet hand is withdrawn from the opening to the outside of the drying space D, the detection unit 40 stops detecting the hand. At this time, the control unit 42 executes a control to stop the driving of the second air blower unit 28. Subsequently, after a predetermined time has elapsed since the driving of the second air blower unit 28 stopped, the control unit 42 executes a control to stop the driving of the first air blower unit 26. In other words, when the detection unit 40 no longer detects a hand, the driving of the second air blower unit 28 is stopped, and then, with a delay, the driving of the first air blower unit 26 is stopped. As a result, with the inside of the drying space D under negative pressure due to the driving of the first air blower unit 26, the driving of the second air blower unit 28 stops before the driving of the first air blower unit 26, thereby effectively suppressing air from leaking out of the opening in the drying space D. 【0060】 The system is configured to operate the first air blower 26 while the second air blower 28 is operating. In other words, the control unit 42 controls the system so that the first air blower 26 is operating while the second air blower 28 is operating. As a result, while the second air blower 28 is operating, the drying space D becomes a negative pressure due to the operation of the first air blower 26, which effectively prevents air from leaking out of the opening in the drying space D. 【0061】 When the first blower unit 26 is activated, air in the drying space D is drawn into the inside of the hand drying device body, i.e., into the suction channel 18. As a result, a negative pressure state is created inside the drying space D, which prevents air from leaking out of the opening. The air drawn into the suction channel 18 collides with the water receiving section 30. 【0062】 The air drawn into the intake channel 18 collides with the water receiving section 30. This allows the air, which contains moisture from the user's hands, to collect and accumulate the moisture. The accumulated water can be discharged by the user by pulling out the water receiving tray 32 from the hand drying device body. 【0063】 The air that collides with the water receiving section 30 passes through the first filter section 34 and is then sent to the first air blower section 26. The first filter section 34 removes dust and other particles contained in the air. The air that has passed through the first air blower section 26 passes through the second filter section 36 and then branches into the circulation passage 20 or the discharge passage 24. At this time, the circulation passage 20 is configured to have a larger cross-sectional area than the discharge passage 24, so that the minimum necessary negative pressure in the drying space D is secured by letting some of the air flow into the discharge passage 24, while most of the air drawn in from the intake port 10 flows into the circulation passage 20. 【0064】 The air that flows through the discharge channel 24 is discharged from the outlet 22. The air discharged from the outlet 22 is converted into clean air by the second filter section 36, which is a HEPA filter. 【0065】 The air flowing through the circulation channel 20 merges with the air flowing from the intake channel 46. The air that has merged with the air flowing from the intake channel 46 passes through the third filter section 38 and is then sent to the second blower section 28. The air that has passed through the second blower section 28 is blown out into the drying space D from the first outlet 2a and the second outlet 4a. The air blown out into the drying space D from the first outlet 2a and the second outlet 4a is then drawn back into the main body of the hand dryer, i.e., into the suction channel 18, by the drive of the first blower section 26. 【0066】 Furthermore, for example, when the first air blower 26 and the second air blower 28 are driven, they operate so that the airflow rate drawn in from the intake port 10 is greater than the airflow rate blown out from the outlet port. This further suppresses the leakage of air from the drying space D through the opening into which a hand is inserted. Note that the above-mentioned driving period may be at least a portion of the time when the first air blower and the second air blower are driven, excluding transient states such as immediately after the start of operation. Also, as mentioned above, the outlets that discharge air into the drying space may be multiple openings (in this example, multiple first outlets 2a and multiple second outlets 4a). In such cases, the "airflow rate blown out from the outlets" may be the sum of the airflow rates at each of the multiple openings. In other words, the "airflow rate of air blown out from the outlet" refers to multiple openings (for example, all openings) that include the first outlet and blow air drawn in from the drying space back into the drying space. More specifically, the "airflow rate of air blown out from the outlet" is, for example, the sum of the airflow rates of air blown out from each of the first and second outlets. 【0067】 In this example, the intake port is a single opening. However, the intake port that draws in air from the drying space may have multiple openings. In such a case, the "airflow rate of air drawn in from the intake port" may be the sum of the airflow rates at each of those multiple openings. That is, the "intake port" in "airflow rate of air drawn in from the intake port" may be multiple openings (for example, all of the openings) that draw in air from the drying space. 【0068】 Furthermore, for example, in the case of Figure 5, the airflow rate in the second air blower 28 may be used as the "airflow rate of air blown out from the outlet." Also, for example, in the case of Figure 5, the airflow rate in the first air blower 26 may be used as the "airflow rate of air drawn in from the intake." Note that the airflow rate in an air blower refers to, for example, the airflow rate at the opening that serves as the air inlet or outlet of that air blower. 【0069】 When the first blower unit 26 and the second blower unit 28 are driven, they operate such that the output of the first blower unit 26 is greater than the output of the second blower unit 28. The output of a blower unit (for example, the first blower unit 26 or the second blower unit 28) corresponds, for example, to the output (power consumption (watts)) of the motor that drives the blower fan included in that blower unit. In other words, the control unit 42 performs control to make the output of the blower fan motor of the first blower unit 26 greater than the output of the blower fan motor of the second blower unit 28. 【0070】 In this way, by operating the first air blower 26 at a higher output than the second air blower 28, the amount of air drawn in from the intake port 10 can be made greater than the amount of air blown out from the outlet port. This further suppresses the leakage of air from the drying space D through the opening into which the hand is inserted. 【0071】 However, the airflow of the blower may be controlled not only by the motor output but also by the structure of the blower fan. For example, the airflow can be adjusted appropriately by the position, number, shape, and size of the blower fan blades. Any configuration that generates airflow by the movement of blades can be used for the blower fan, such as a propeller fan, sirocco fan, or turbo fan. 【0072】 Furthermore, for example, when the first blower unit 26 and the second blower unit 28 are driven, the airflow rate from the outlet may be greater than the airflow rate from the exhaust port 22. Since the outlet blows out a relatively large amount of air, drying performance can be maintained. 【0073】 In this example, the outlet is a single opening. However, there may be multiple outlets for discharging air from the flow path to the outside. In such cases, the "airflow rate of air discharged from the outlet" may be the sum of the airflow rates at each of those multiple openings. That is, the "outlet" in "airflow rate of air discharged from the outlet" may be any of the multiple openings (for example, all of the openings) that discharge air from the flow path to the outside. 【0074】 To measure the airflow rate in a blower unit during operation, the blower unit to be measured is driven with the same output as the blower unit being driven, and with all other blowers stopped, the airflow rate flowing through the blower unit to be measured is measured using an airflow measuring device. The airflow measuring device can be a device capable of measuring the airflow-static pressure characteristics (PQ characteristics) of a fan (such as a PQ device). 【0075】 Specifically, for example, the second blower unit 28 is stopped, and the first blower unit 26 is driven at the same output as when the first blower unit 26 and the second blower unit 28 are driven. In this state, the airflow rate of the air flowing through the first blower unit 26 is measured using an airflow measuring device. The measurement result may be used as the "airflow rate of air drawn in from the intake port." Then, for example, the first blower unit 26 is stopped, and the second blower unit 28 is driven at the same output as when the first blower unit 26 and the second blower unit 28 are driven. In this state, the airflow rate of the air flowing through the second blower unit 28 is measured using an airflow measuring device. The measurement result may be used as the "airflow rate of air blown out from the outlet port." 【0076】 Alternatively, to measure the airflow rate at a given opening, you would need the wind speed at that opening (m / s) and the area of ​​the opening (m²). 2 ) and are measured. The airflow can be calculated from the product of the wind speed and the area. For measuring the wind speed, an anemometer that converts the pressure difference into wind speed (e.g., a Pitot tube type) or a hot-wire anemometer can be used. The detection unit of the anemometer (e.g., a probe) is placed approximately in the center of the opening or immediately upstream or downstream to measure the wind speed. 【0077】 Specifically, for example, when the first blower unit 26 and the second blower unit 28 are operating, an anemometer detection unit is installed at the intake port 10 to measure the wind speed. The airflow rate at the intake port 10 can be measured from the product of the wind speed and the area of ​​the intake port 10. This measurement result may be used as the "airflow rate of air drawn in from the intake port." Then, for example, when the first blower unit 26 and the second blower unit 28 are operating, an anemometer detection unit is installed at one outlet (first outlet 2a or second outlet 4a) to measure the wind speed. The airflow rate at that outlet can be measured from the product of the wind speed and the area of ​​that outlet. The sum of the airflow rates measured at each outlet in this way may be used as the "airflow rate of air blown out from the outlet." 【0078】 As shown in Figures 1 to 5 above, the hand drying device 100 according to the embodiment has a housing having an inner surface (for example, a first wall portion 2, a second wall portion 4, and a bottom portion 8) and an opening for the user to insert their hands into the drying space D surrounded by the inner surface. Furthermore, the hand drying device 100 has an intake port 10, an outlet port (for example, at least one of a first outlet port 2a and a second outlet port 4a), a flow path section 14, an air blowing section 12, and an exhaust port 22. The intake port 10 is provided on the inner surface and sucks in air from within the drying space D. The outlet port is provided on the inner surface and blows air into the drying space D. The flow path section 14 connects the intake port 10 and the outlet port. The air blower 12 is provided in the flow path section 14 and draws air into the intake port 10, and blows out at least a portion of the air drawn into the intake port 10 through the flow path section 14 from the outlet. The discharge port 22 discharges a portion of the air drawn in from the intake port 10 through the flow path section 14. As mentioned above, this makes it possible to suppress the leakage of air from the drying space through the opening while drying hands. By providing a discharge port, the leakage of air from the drying space through the opening can be further suppressed, improving ease of use. Furthermore, the filter section 16 (for example, the first filter section 34 and the second filter section 36) is located upstream of the discharge port 22 in the airflow path section 14 from the intake port 10 to the outlet port. By positioning the filter section 16 upstream of the discharge port 22, the air discharged from the discharge port 22 can be purified. 【0079】 Furthermore, in the flow path section, "upstream" refers to the part of the flow path section that is closer to the intake port along the direction of airflow. For example, the direction from upstream to downstream on the flow path section is the direction from the intake port to the outlet port, along the direction of airflow. Also, "connection" can be direct or indirect. 【0080】 Figures 6(a) and 6(b) are schematic perspective views illustrating another hand drying apparatus according to an embodiment of the present invention. Figure 6(a) is a perspective view of the hand drying device 200 according to this embodiment, viewed from the front, and Figure 6(b) is a perspective view of the hand drying device 200 viewed from the rear. In this description, the front side of the hand drying device 200 is referred to as the "front," and the back side as the "rear." A user of the hand drying device 200, for example, stands in front of the hand drying device 200 with their back to the user and inserts their wet hands into the drying space SP. "Up," "down," "right side," and "left side" are directions viewed from the user standing facing forward, respectively. 【0081】 As shown in Figures 6(a) and 6(b), the hand drying device 200 has a housing 50 (case). The housing 50 has an inner surface 50i facing inward, and an opening 50A into which the user inserts their hands into the drying space SP surrounded by the inner surface 50i. The opening 50A faces upward. 【0082】 For example, the housing 50 is a roughly rectangular parallelepiped shape that is long in the vertical direction and has an opening 50A at the top. The outer surface 50j of the housing 50 is formed by the front 91, the back 92, the right side 93, the left side 94, and the bottom 95. 【0083】 The hand drying device 200 has air outlets (first air outlet 61 and second air outlet 62) provided on its inner surface 50i. The air outlets (first air outlet 61 and second air outlet 62) blow air into the drying space SP. The user can dry their wet hands by holding their hands over the air (wind) blown out from the air outlets. 【0084】 Figures 7 and 8 are schematic cross-sectional views showing the hand drying apparatus of Figure 6(a). Figure 7 shows the cross-section of line AA shown in Figure 6(a), and Figure 8 shows the cross-section of line BB shown in Figure 6(a). 【0085】 As shown in Figure 8, the inner surface 50i of the housing 50 has a first surface 51 (e.g., a first wall), a second surface 52 (e.g., a second wall), and a bottom surface 55 (e.g., the bottom). The first surface 51 is a rearward-facing surface, and the second surface 52 is a forward-facing surface. The second surface 52 is located behind the first surface 51 and faces the first surface 51. The bottom surface 55 connects the first surface 51 and the second surface 52 and forms the bottom of the drying space SP. 【0086】 The first outlet 61 is provided on the first surface 51. For example, the first outlet 61 is an opening provided on the first surface 51 and is located at the top of the first surface 51. In this example, multiple first outlets 61 are arranged in the left-right direction (see Figure 6(b)). The second outlet 62 is an opening provided on the second surface 52 and is located at the top of the second surface 52. In this example, multiple second outlets 62 are arranged in the left-right direction (see Figure 6(a)). Note that the first outlet 61 and the second outlet 62 are not limited to openings, but may also be outlets such as nozzles attached to the first surface 51, the second surface 52, etc. 【0087】 In the cross-section shown in Figure 8, the first surface 51 and the second surface 52 are curved surfaces. Specifically, the first surface 51 has a curved portion that protrudes toward the rear. The second surface 52 has a curved portion that protrudes toward the front. Therefore, the width (length in the front-to-back direction) of the drying space SP changes along the vertical direction. The drying space SP is widest at its upper end and has a narrower portion below the upper end. The first outlet 61 and the second outlet 62 are located below the upper end of the drying space SP. The first outlet 61 faces downward and rearward and blows air downward and rearward. The second outlet 62 faces downward and frontward and blows air downward and frontward. 【0088】 As shown in Figure 7, the inner surface 50i of the housing 50 further has a third surface 53 and a fourth surface 54 facing the third surface 53. The third surface 53 is the left-facing surface, and the fourth surface 54 is the right-facing surface. The third surface 53 and the fourth surface 54 are the surfaces that connect the first surface 51 and the second surface 52, respectively. 【0089】 In this embodiment, the shape of the housing 50 (inner surface 50i and outer surface 50j) is not limited to those described above. For example, the opening for the user to insert their hand into the drying space may face upwards, forwards, to the right, and to the left. The housing may also have a top surface. Furthermore, the position, shape, and number of air outlets are not limited to those described above. For example, air outlets may be provided on at least one of the first surface 51, second surface 52, third surface 53, and fourth surface 54. Alternatively, if the inner surface 50i of the housing 50 has a top surface, air outlets may be provided on that top surface. For example, the hand drying device may blow air downwards from above the user's hand, which is inserted into the drying space from the front. 【0090】 As shown in Figure 7, the hand dryer 200 has an intake port 63 for drawing in air from the drying space SP. The intake port 63 is provided on the inner surface 50i of the housing 50. For example, the intake port 63 is provided at the bottom of the inner surface 50i and is located below the first outlet port 61 and the second outlet port 62. In this example, the intake port 63 is provided on the bottom surface 55 and is an upward-facing opening. 【0091】 Furthermore, as shown in Figures 7 and 8, the hand drying device 200 has a flow path section 70 that connects the intake port 63 and the outlet ports (first outlet port 61 and second outlet port 62). The flow path section 70 is provided inside the housing 50. The flow path section 70 is a flow path that guides at least a portion of the air drawn in from the intake port 63 to the outlet ports (first outlet port 61 and second outlet port 62). 【0092】 In this example, as shown in Figure 7, the flow path section 70 has a first flow path 71 (e.g., a suction flow path) and a second flow path 72 (e.g., a circulation flow path). Furthermore, the flow path section 70 may also have a third flow path 73 (e.g., a discharge flow path), as will be described later with respect to Figure 9. 【0093】 The first flow path 71 extends downward from the intake port 63 and continues to the bottom of the hand drying device 200. As shown by arrow A1 in Figure 7, the first flow path 71 guides the air drawn in from the intake port 63 onto the lower case member 56 that forms the bottom of the housing 50. 【0094】 The second flow path 72 is located downstream of the first flow path 71 in the flow path section 70. The second flow path 72 extends upward from the bottom of the hand drying device 200. As shown by arrow A2 in Figure 7, the second flow path 72 guides at least a portion of the air supplied by the first flow path 71 to the outlets (first outlet 61 and second outlet 62). 【0095】 More specifically, as shown in Figure 8, the second flow path 72 has flow path 72a and flow path 72b. In other words, the second flow path 72 branches into flow path 72a and flow path 72b. Flow path 72a continues to the first outlet 61, as indicated by arrow A3, and guides air to the first outlet 61. Flow path 72b continues to the second outlet 62, as indicated by arrow A4, and guides air to the second outlet 62. 【0096】 As shown in Figure 7, the hand drying device 200 also includes a filter 67 and an air blower 65. The air blower 65 is provided in the flow path 70. Specifically, the air blower 65 is provided in the second flow path 72. The air blower 65 is, for example, a single fan that can be driven by one motor. When the air blower 65 is driven, air is generated within the flow path 70, flowing from upstream to downstream. That is, the air blower 65 draws air into the intake port 63 and blows at least a portion of the air drawn into the intake port 63 out through the flow path 70 to the drying space SP from the outlets (first outlet 61 and second outlet 62). In this embodiment, the air blower may have two or more motors. The hand drying device may be provided with two or more fans, each having one or more motors. 【0097】 The filter 67 has a first filter section 67a and a second filter section 67b. The first filter section 67a is provided in the second flow path 72. The first filter section 67a is located above the lower case member 56 and below the air blower section 65. In other words, in the flow path section 70, the first filter section 67a is located downstream of the lower case member 56 and upstream of the air blower section 65. The first filter section 67a collects particles (bacteria and dust) in the second flow path 72. The first filter section 67a is capable of collecting particles smaller than those collected by the second filter section 67b. For example, a HEPA filter can be used for the first filter section 67a. A HEPA filter has a particle collection efficiency of 99.97% or more for 0.3 μm particles at the rated flow rate. The initial pressure loss of a HEPA filter is, for example, 245 Pa or less. 【0098】 The second filter section 67b is provided in the first channel 71. The second filter section 67b collects particles in the first channel 71. The second filter section 67b can be a mesh filter containing resin or metal. In this example, the filter 67 is provided with two filters, the first filter section 67a and the second filter section 67b, but in this embodiment, there may be one filter or three or more filters. 【0099】 Furthermore, as shown in Figure 8, the hand drying device 200 may be provided with a heating unit 68. The heating unit 68 warms the air in the flow channel 70. The heating unit 68 may be any heater capable of heating the air directed toward the outlet. By heating the air in the heating unit 68, warm air can be blown out from the outlet. This can alleviate the feeling of coldness the user experiences when drying their hands, for example, and improve usability. In this example, a heating unit is provided, but in other embodiments, a heating unit may not be provided. In the flow channel 70, the heating unit 68 is provided upstream of the branching point where the flow channel 70 branches into flow channel 72a and flow channel 72b. In this example, in the flow channel 70, the heating unit 68 is located downstream of the air blower 65 and upstream of the third flow channel 73, which will be described later. 【0100】 When a user inserts their hand into the drying space SP through the opening 50A, the user's hand is detected by the detection unit 48 (see Figure 7) provided on the second surface 52. The detection unit 48 outputs the detection result to the control unit 69 (see Figure 7). The detection unit is, for example, a transmissive optical sensor (photointerrupter). The detection unit is not limited to this and may be any sensor capable of detecting a user's hand. The detection unit may also be, for example, a reflective optical sensor, a distance measuring sensor, a pyroelectric sensor, a capacitance sensor, an ultrasonic sensor, or a microwave sensor. 【0101】 The control unit 69 is electrically connected to the detection unit 48, the blower unit 65, and the heating unit 68. The control unit 69 controls the operation of the blower unit 65 and the heating unit 68 according to the detection result of the detection unit 48. For example, if the user's hand is detected by the detection unit 48, the control unit 69 outputs a signal to the blower unit 65 and the heating unit 25 to start operation. Also, if the user's hand is no longer detected by the detection unit 48, the control unit 69 outputs a signal to the blower unit 65 and the heating unit 68 to stop operation. The control unit is a control circuit including a processor, etc. The control unit includes, for example, a microcontroller. 【0102】 Figure 9 is a schematic diagram showing the airflow of the hand drying apparatus shown in Figure 6(a). The arrows in Figure 9 represent the airflow, i.e., the direction of the wind. As shown in Figure 9, the hand drying device 200 also has an outlet 64. The outlet 64 discharges a portion of the air drawn in from the intake port 63 through the flow path section 70. The flow path section 70 also has a third flow path 73 (for example, an exhaust flow path) connected to the outlet 64. 【0103】 In this example, the third flow path 73 branches off from the second flow path 72. That is, a portion of the air that flows into the second flow path 72 is discharged outside the flow path section 70 through the outlet 64 via the third flow path 73. Another portion of the air that flows into the second flow path 72 is discharged from the outlets (first outlet 61 and second outlet 62) through the flows 72a and 72b of the second flow path 72. 【0104】 For example, in the flow path section 70, the branching point between the second flow path 72 and the third flow path 73 is downstream of the blower section 65 and upstream of the branching point between flow path 72a and flow path 72b. In the flow path section 70, the branching point between the second flow path 72 and the third flow path 73 may be downstream or upstream of the heating section 68. However, the third flow path 73 may branch off from any position on the flow path section between the intake port and the outlet port. For example, the third flow path 73 may branch off from the first flow path 71. 【0105】 The discharge port 64 is provided, for example, on the outer surface 50j of the housing 50. In other words, the discharge port 64 is exposed to the outer surface 50j of the housing 50. In this case, the discharge port 64 directly discharges the air in the flow path section 70 to the outside of the housing 50, i.e., to the outside of the hand drying device 200. The discharge port 64 is provided, for example, on the rear surface 92 of the housing 50 (see Figure 6(b)). However, the discharge port 64 may be provided on at least one of the front surface 91, right side surface 93, left side surface 94, and bottom surface 95 of the housing 50. 【0106】 The discharge port 64 may be located inside the housing 50. In other words, the discharge port 64 does not have to be exposed to the outer surface 50j. In this case, the discharge port 64 discharges the air in the flow path section 70 into the housing 50, i.e., into the hand drying device 200. 【0107】 In this embodiment, the third flow path 73 and the outlet 64 are not necessarily required. For example, the third flow path 73 may be omitted, and the outlet 64 may be an opening provided at any position in the flow path section 70, such as the first flow path 71 or the second flow path 72. In addition, the flow path section 70 may be provided with an intake port or intake flow path for taking in air from the outside, as needed. 【0108】 When a user's hand is detected in the drying space SP and the blower unit 65 is activated, circulating air w1 is generated. The circulating air w1 is the flow of air drawn in downward from the intake port 63. The circulating air w1 flows through the first flow path 71 and into the second flow path 72, where it rises. The circulating air w1 passes through the first filter unit 67a and the blower unit 65. The circulating air w1 that has passed through the blower unit 65 generates drying air w2 and exhaust air w3. Drying air w2 is a part of the air sent by the circulating air w1 and is the flow of air discharged from the outlets (first outlet 61 and second outlet 62). Drying air w2 includes air w2a discharged from the first outlet 61 into the drying space SP and air w2b discharged from the second outlet 62 into the drying space SP. Exhaust air w3 is another part of the air sent by the circulating air w1 and is the flow of air discharged from the outlet 64. Furthermore, when the blower unit 65 is driven, a suction airflow w4 is generated. The suction airflow w4 is the flow of air that flows from outside the hand drying device 200 into the drying space SP through the opening 50A. 【0109】 For example, the airflow rate of the circulating air w1 (the amount of air moved per unit time) corresponds to the sum of the airflow rate of the drying air w2 and the airflow rate of the exhaust air w3. Also, for example, the airflow rate of the suction air w4 corresponds to the airflow rate of the exhaust air w3. The hand drying device 200 is a circulating type hand drying device that circulates at least a portion of the air in the drying space SP between the drying space SP and the flow path section 70. 【0110】 For example, the hand drying device 200 is configured to draw in air from the intake port 63 and blow out air from the outlets (first outlet 61 and second outlet 62) in order to prevent air from leaking out of the drying space SP through the opening 50A while the blower unit 65 is running. 【0111】 This suppresses the generation of airflow from the drying space SP toward the user (e.g., the user's face), allowing the user to dry their hands comfortably and making it user-friendly. Additionally, the air that strikes the user's hands from the outlets (first outlet 61 and second outlet 62) prevents water droplets on the user's hands from becoming airborne droplets and scattering from the opening 50A. Even if bacteria or viruses are present on the user's hands, the air that strikes the user's hands from the outlets (first outlet 61 and second outlet 62) reduces the possibility of these bacteria or viruses being expelled from the hand drying device 200 along with droplets, resulting in improved hygiene. 【0112】 For example, while the blower unit 65 is running, the inside of the drying space SP becomes a negative pressure state with a lower atmospheric pressure than the outside of the hand drying device 200. This prevents air from the drying space SP from leaking to the outside through the opening 50A. In this embodiment, an intake port 63 is provided in the drying space SP. By drawing air from the drying space SP through the intake port 63, a negative pressure state can be created inside the drying space SP. Thus, the hand drying device according to this embodiment may be configured to ensure the minimum necessary negative pressure by drawing air from the drying space through the intake port using a blower unit that can be driven by a single motor. 【0113】 As mentioned above, a portion of the air in the flow path section 70 is discharged through the outlet 64. In this case, for example, the airflow rate of the circulating air w1 is greater than the airflow rate of the drying air w2. For example, the airflow rate of the drying air w2 corresponds to the amount obtained by subtracting the airflow rate of the exhaust air w3 from the airflow rate of the circulating air w1. By discharging a portion of the air drawn in from the intake port 63 through the flow path section 70, it becomes easier to create a negative pressure state in the drying space SP, and it is easier to secure the minimum necessary negative pressure. Therefore, by providing the outlet 64, leakage of air from the drying space SP through the opening 50A can be further suppressed, and usability can be improved. 【0114】 For example, a negative pressure state inside the drying space SP corresponds to a situation where, if the opening 50A (an opening that directly leads from the drying space SP to the outside of the housing 50) is closed, the blower unit 65 is driven, and a negative pressure state is created inside the drying space SP. In this case, the first outlet 61, the second outlet 62, and the intake port 63, etc. (openings that lead from the drying space SP to the inside of the housing 50) are left open. In other words, a negative pressure state is a state in which, for example, excluding the inflow and outflow of air through the opening into which the user puts their hand, the amount of air flowing out of the drying space is greater than the amount of air flowing into the drying space. 【0115】 Furthermore, for example, an intake airflow w4 is generated while the blower unit 65 is running. This prevents air from leaking out of the drying space SP through the opening 50A. In this embodiment, air from the drying space SP is drawn in through the intake port 63. This generates an intake airflow w4 that flows into the drying space SP. In this example, the direction of the circulating airflow w1 is downward, opposite to the direction of the opening 50A. Also, the direction of the drying airflow w2 is diagonally downward, opposite to the direction of the opening 50A. This makes it easier to create a downward airflow within the drying space SP. As a result, outside air is drawn into the drying space SP through the opening 50A, making it easier to generate the intake airflow w4. For example, the airflow rate of the drying airflow w2 can be increased, or the wind speed of the drying airflow w2 can be increased. This creates a downward airflow, making it easier to generate the intake airflow w4. The wind speed of the drying airflow w2 may be higher than the wind speed of the circulating airflow w1. 【0116】 Furthermore, in this embodiment, the air blower 65 can draw in air from the intake port 63 and blow out air from the outlets (first outlet 61 and second outlet 62) using a single motor. Therefore, it is not necessary to provide two or more motors, and the hand drying device 200 can be made more compact. 【0117】 Furthermore, in a circulating hand dryer, the temperature of the air can easily rise. For example, the circulating air is repeatedly heated by the heating unit 68. In contrast, by discharging some of the air from the outlet 64, the rise in the temperature of the air can be suppressed. This reduces damage to the circuit board of the control unit and other components due to heat, and makes the operation more stable. As mentioned above, in this example, the outlet 64 directly discharges the air in the flow path 70 to the outside of the machine. This further suppresses the rise in the temperature of the air. Also, by directly discharging the air in the flow path 70 to the outside of the machine, the outlet 64 can easily generate an intake airflow w4, and this intake airflow w4 can suppress the rise in the temperature of the air. 【0118】 Furthermore, as shown in Figure 9, the first filter section 67a is located upstream of the outlet 64 in the flow path section 70. By positioning the first filter section 67a upstream of the outlet 64, the air discharged from the outlet 64 can be purified, thereby improving ease of use. 【0119】 In this example, the first filter section 67a is located upstream of the air blower section 65. The first filter section 67a may also be located downstream of the air blower section 65, or in the third flow path 73. If the first filter section 67a is located upstream of the branching point between the second flow path 72 and the third flow path 73, not only the air discharged from the outlet 64 but also the air blown out from the first outlet 61 and the second outlet 62 can be purified, further improving usability. 【0120】 Furthermore, for example, the airflow rate of the air blown out from the outlet (airflow rate of drying air w2) is smaller than the airflow rate of the air drawn in from the intake port 63 (airflow rate of circulating air w1), and larger than the airflow rate of the air discharged from the outlet port 64 (airflow rate of exhaust air w3). In this case, since the airflow rate of the air drawn in from the intake port 63 is relatively large, leakage of air from the drying space SP through the opening 50A can be suppressed. In addition, the airflow rate of the air blown out from the outlet is greater than the airflow rate of the air discharged from the outlet port 64, thus maintaining drying performance. For example, more air can be discharged onto the user's hands, making it easier to dry hands quickly. Note that the airflow rate of the air blown out from the outlet is the sum of the airflow rate of the air blown out from the first outlet port 61 and the airflow rate of the air blown out from the second outlet port 62. 【0121】 Each airflow rate can be appropriately adjusted, for example, by the pressure loss of the fluid flowing through each channel. The pressure loss can be appropriately adjusted, for example, by the cross-sectional area of ​​the channel. For example, the pressure loss of the fluid flowing through the first channel 71 is smaller than the pressure loss of the fluid flowing through the second channel 72 and smaller than the pressure loss of the fluid flowing through the third channel 73. For example, the minimum cross-sectional area of ​​the first channel 71 is larger than the minimum cross-sectional area of ​​the second channel 72 and larger than the minimum cross-sectional area of ​​the third channel 73. Also, for example, the pressure loss of the fluid flowing through the second channel 72 is smaller than the pressure loss of the fluid flowing through the third channel 73. For example, the minimum cross-sectional area of ​​the second channel 72 is larger than the minimum cross-sectional area of ​​the third channel 73. 【0122】 For example, when a user stands in front of the hand drying device 200 and inserts their hand through the opening 50A, the first outlet 61 blows air onto the user's palm, and the second outlet 62 blows air onto the back of the user's hand. This allows both sides of the user's hand to be dried simultaneously, improving drying performance. For high-speed drying, it is desirable to blow air at high speed. 【0123】 For example, the direction D2 in which the second outlet 62 blows air is downward compared to the direction D1 in which the first outlet 61 blows air. In other words, the angle θ2 between direction D2 and the vertical downward direction is smaller than the angle θ1 between direction D1 and the vertical downward direction. In this case, because the second outlet 62 blows air relatively downward, it is easier to blow air onto the back of the user's hand from above. This makes it easier to move (fall) water downward and further suppresses the scattering of water droplets from the opening. 【0124】 Direction D1 can be adjusted as appropriate depending on the orientation and shape of the opening of the first outlet 61. If the air blown out from the first outlet 61 has a vertical spread, direction D1 may be represented, for example, by the center line of the range from which the first outlet 61 blows air. Similarly, direction D2 can be adjusted as appropriate depending on the orientation and shape of the opening of the second outlet 62. If the air blown out from the second outlet 62 has a vertical spread, direction D2 may be represented, for example, by the center line of the range from which the second outlet 62 blows air. 【0125】 Furthermore, for example, the airflow rate from the first outlet 61 is greater than that from the second outlet 62. In this case, the relatively large airflow rate from the first outlet 61 allows for maintaining drying performance while keeping power consumption down. For example, blowing more air onto the palm side of the user's hand, where more water droplets are likely to be present, helps to dry the hand more quickly. 【0126】 Furthermore, if multiple first outlets 61 are provided, the airflow rate of the air blown out by the first outlets 61 is the sum of the airflow rates of the air blown out from all first outlets 61. Similarly, if multiple second outlets 62 are provided, the airflow rate of the air blown out by the second outlets 62 is the sum of the airflow rates of the air blown out from all second outlets 62. 【0127】 For example, the pressure loss of the fluid flowing through channel 72a is smaller than the pressure loss of the fluid flowing through channel 72b. For example, the minimum cross-sectional area of ​​channel 72a is larger than the minimum cross-sectional area of ​​channel 72b. 【0128】 Furthermore, for example, the air velocity of the air blown out from the first outlet 61 may be higher than the air velocity of the air blown out from the second outlet 62. The air velocity of the air blown out from the first outlet 61 can be appropriately adjusted by the pressure loss of the fluid flowing through the flow path 72a and the shape of the first outlet 61 (for example, the size of the opening diameter). Similarly, the air velocity of the air blown out from the second outlet 62 can be appropriately adjusted by the pressure loss of the fluid flowing through the flow path 72b and the shape of the second outlet 62 (for example, the size of the opening diameter). 【0129】 As shown in Figure 7, the hand drying device 200 has a drain port 80, a water channel 81, and a water receiving section 82. The water receiving section 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 that were on the user's hands. The drain port 80 discharges the water in the drying space SP to the water receiving section 82. The water channel 81 connects the drain port 80 and the water receiving section 82. The water channel 81 guides the water in the drying space SP from the drain port 80 to the water receiving section 82. 【0130】 The drain port 80 is provided on the inner surface 50i of the housing 50. The location of the drain port 80 is different from the location of the suction port 63. In other words, the drain port 80 is located away from the suction port 63. In this example, the drain port 80 is an opening provided on the bottom surface 55. More specifically, the drain port 80 is located at one end (left end) of the bottom surface 55, and the suction port 63 is located at the other end (right end) of the bottom surface 55. In other words, the drain port 80 is provided adjacent to the fourth surface 54, and the suction port 63 is provided adjacent to the third surface 53. By providing a drain port 80 that is different from the suction port 63 in this way, water and air in the drying space can be separated. This makes the air passing through the flow path cleaner and improves usability. 【0131】 The water channel 81 and the water receiving section 82 are separate from the flow channel section 70. In other words, the water channel 81 and the water receiving section 82 are provided independently of the flow channel section 70. In this example, the water channel 81 is adjacent to the fourth surface 54 and extends downward from the drain outlet 80. The water receiving section 82 is located below the water channel 81. On the other hand, the first flow channel 71 of the flow channel section 70 is adjacent to the third surface 53 and extends downward from the suction port 63. 【0132】 For example, if the water in the water receiving section comes into contact with the air, the air may become contaminated by substances and odors contained in the water. In contrast, in this embodiment, by separating the water in the water receiving section 82 from the air passing through the flow path section 70, the contamination of the air passing through the flow path section 70 can be suppressed. That is, the air blown out from the first outlet 61 and the second outlet 62 and circulated, the air discharged from the outlet 64, and the air passing through the first filter section 67a can be kept in a cleaner state. As a result, for example, unpleasant odors in the air blown out from the first outlet 61, the second outlet 62, and the outlet 64 can be suppressed, improving hygiene. Also, for example, by suppressing contact between the first filter section 67a and contaminated air, the deterioration of the filter's performance can be suppressed. 【0133】 Furthermore, as shown in Figure 7, for example, the bottom surface 55 has a downward slope from the suction port 63 to the drain port 80. In other words, the position of the drain port 80 is lower than the position of the suction port 63. As a result, water on the bottom surface 55 is directed towards the drain port 80, thus preventing water from entering the flow channel section 70 from the suction port 63. 【0134】 Furthermore, 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 prevent water on the bottom surface 55 from entering the flow path section 70 from the suction port 63. 【0135】 Furthermore, as shown by the dashed line in Figure 7, a rib 59 may be provided above the suction port 63. The rib 59 is an overhang that protrudes diagonally downward from the third surface 53. In the vertical direction, the rib 59 overlaps with at least a portion of the suction port 63. The rib 59 can prevent water in the drying space SP from entering the flow path section 70 from the suction port 63. 【0136】 Figure 10 is a schematic perspective view showing a part of the hand drying apparatus shown in Figure 6(a). Figures 11(a) and 11(b) are schematic cross-sectional views showing a part of the hand drying apparatus shown in Figure 10. Figure 10 shows the area around the lower case member 56 of the hand drying device 200. Figure 11(a) shows the cross-section of line CC shown in Figure 10. Figure 11(b) shows the cross-section of line DD shown in Figure 10. 【0137】 The lower case member 56 is a component that forms part of the flow path section 70. The lower case member 56 is dish-shaped and forms the bottom of the flow path section 70. The air in the flow path section 70 passes over the lower case member 56. 【0138】 As shown in Figure 10, the hand drying device 200 includes a water channel 83, a water receiving section 84, and a water level sensor 88. The hand drying device 200 further includes a drain port 85 (see Figure 11(a)) and a partition 86 (see Figure 11(b)). 【0139】 The water receiving section 84 is a water receiving tray that collects water that enters the flow path section 70. The water receiving section 84 is located below the lower case member 56. In other words, the water receiving section 84 is located below the flow path section 70. 【0140】 The drain port 85 is provided in the flow channel section 70 and discharges water that has entered the flow channel section 70 to the water receiving section 84. As shown in Figure 11(a), the drain port 85 is an opening provided on the side of the lower case member 56. 【0141】 The water channel 83 is provided in the flow channel section 70 and guides water that enters the flow channel section 70 to the drain outlet 85. As shown in Figures 10 and 11(a), the water channel 83 is a recess provided on the upper surface of the lower case member 56. The water channel 83 extends from the central part of the lower case member 56 to the drain outlet 85. The water channel 83 has a downward slope from the central part of the lower case member 56 toward the drain outlet 85. In addition, the upper surface of the lower case member 56 is provided with a downward slope toward the central part of the lower case member 56. As a result, water droplets that enter the flow channel section 70 and adhere to the lower case member 56 pass through the water channel 83 and are discharged from the drain outlet 85 to the water receiving section 84. 【0142】 As shown in Figure 11(b), the partition 86 is provided between the flow channel 70 and the water receiving section 84. For example, the partition 86 is part of the lower case member 56 and separates the flow channel 70 and the water receiving section 84 in the vertical direction. The partition 86 covers at least a portion of the upper part of the water receiving section 84. For example, the partition 86 covers the entire area of ​​the water receiving section 84 that receives water. 【0143】 With this configuration, even if water enters the flow path section 70, the water that enters the flow path section 70 can be separated from the air inside the flow path section 70. As a result, the air passing through the flow path section 70 becomes cleaner, and usability is further improved. In other words, by separating the water receiving section 84 from the air passing through the flow path section 70, contamination of the air passing through the flow path section 70 can be suppressed. The air blown out from the first outlet 61 and the second outlet 62 and circulated, the air discharged from the outlet 64, and the air passing through the first filter section 67a can be kept in a cleaner state. 【0144】 The water level sensor 88 is attached to the lower case member 56. The water level sensor 88 detects the water level on the lower case member 56. This allows for the detection of water accumulated on the lower case member 56 even if a large amount of water enters the flow channel 70. Any sensor capable of detecting the water level on the lower case member 56 can be used as the water level sensor, such as a capacitive, pressure, or float type sensor. 【0145】 Figure 12 is a schematic perspective view showing a part of the hand drying apparatus shown in Figure 6(a). As shown in Figure 12, the hand drying device 200 may further have 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 waterway 83 can be discharged from the drain port 85 to the outside of the flow channel 70. 【0146】 Figure 13 is a schematic exploded view showing the hand drying apparatus shown in Figure 6(a). The water receiving section 82 is exposed on the outer surface 50j of the housing 50. For example, the water receiving section 82 forms part of the front of the hand dryer 200. As shown in Figure 13, the water receiving section 82 is detachable from the housing 50. The user or manager of the hand dryer 200 can pull out the water receiving section 82 from the housing 50 to remove the water collected in the water receiving section 82 or clean the area around the water receiving section 82. 【0147】 Below the water receiving section 82, a cover 91a, which forms part of the front of the hand drying device 200, is detachably provided. When the cover 91a is removed from the housing 50, the cover 91b and the water receiving section 84 are exposed. The water receiving section 84 is detachable from the lower case member 56. The user or manager of the hand drying device 200 can pull out the water receiving section 84 from the lower case member 56 to remove the water collected in the water receiving section 84 or clean the area around the water receiving section 84. The cover 91b is also detachable. By removing the cover 91b, the user or manager of the hand drying device 200 can remove and replace the first filter section 67a. Thus, the detachability of the first filter section 67a and the water receiving sections 82 and 84 makes maintenance easier. For the attachment and detachment of the water receiving section 82, water receiving section 84, cover 91a, and cover 91b, appropriate engaging parts such as claws or protrusions may be provided. The attachment and detachment are not limited to this configuration; any configuration that allows the water receiving section 82, water receiving section 84, cover 91a, and cover 91b to be attached and detached is acceptable. 【0148】 Figure 14 is a schematic diagram showing the airflow of another hand drying apparatus according to an embodiment. In the hand drying device 201 shown in Figure 14, instead of the blower unit 65, a blower unit 65a (first blower unit) and a blower unit 65b (second blower unit) are provided. Also, in the hand drying device 201, similar to the hand drying device 200, a housing 50 having an inner surface 50i and an opening 50A, an intake port 63, an outlet port (first outlet port 61 and second outlet port 62), a flow path section 70, an outlet port 64, a control unit 69, a filter section (first filter section 67a and second filter section 67b), etc. 【0149】 Each of the air blowers 65a and 65b is a fan with a motor. For example, air blower 65a is located on the flow path 70 upstream of air blower 65b and the first filter 67a. Air blower 65a is located in the first flow path 71. Air blower 65b is located on the flow path 70 downstream of the first filter 67a and upstream of the third flow path 73. Air blower 65b is located in the second flow path 72. The driving of each of the air blowers 65a and 65b is controlled by the control unit 69. 【0150】 When a user inserts a wet hand into the drying space SP through the opening, the detection unit 48 detects the hand. Upon detection of the hand by the detection unit 48, a signal is transmitted from the detection unit 48 to the control unit 69. Upon receiving the signal, the control unit 69 executes a control to drive the air blower unit 65a. Subsequently, after a predetermined time has elapsed since the start of driving the air blower unit 65a, it executes a control to drive the air blower unit 65b. That is, when the detection unit 40 detects a hand, the air blower unit 65a is driven first, and then, with a delay, the air blower unit 65b is driven. By driving the air blower unit 65a before the air blower unit 65b, leakage of air from the drying space SP through the opening can be further suppressed. The predetermined time for delaying the driving of the air blower unit 65b is, for example, approximately 0.01 seconds to 2.0 seconds, but is not particularly limited and can be determined as appropriate. 【0151】 When a wet hand is withdrawn from the opening to the outside of the drying space SP, the detection unit 48 stops detecting the hand. At this time, the control unit 69 executes a control to stop the operation of the blower unit 65b. Subsequently, after a predetermined time has elapsed since the operation of the blower unit 65b stopped, the control unit 69 executes a control to stop the operation of the blower unit 65a. That is, when the detection unit 48 no longer detects a hand, the operation of the blower unit 65b is stopped, and then, with a delay, the operation of the blower unit 65a is stopped. By stopping the operation of the blower unit 65b before the operation of the blower unit 65a, it is possible to further suppress the leakage of air from the opening in the drying space SP. The predetermined time for delaying the stopping of the operation of the blower unit 65a is, for example, about 0.01 seconds to 2.0 seconds, but is not particularly limited and can be set as appropriate. 【0152】 The system is configured to operate the air blower 65a while the air blower 65b is operating. In other words, the control unit 69 controls the system so that the air blower 65a is operating while the air blower 65b is operating. This effectively prevents air from leaking out of the opening in the drying space SP. Specifically, while air is being blown out into the drying space SP from the outlet, air from the drying space SP is more easily drawn in from the intake port 63, thus further preventing air from leaking out of the opening in the drying space SP. 【0153】 Furthermore, for example, when the air blowers 65a and 65b are driven, they operate so that the airflow rate drawn in from the intake port 63 is greater than the airflow rate blown out from the outlet port. This further suppresses the leakage of air from the drying space SP through the opening into which a hand is inserted. 【0154】 For example, when the air blowers 65a and 65b are driven, they operate such that the output of air blower 65a is greater than the output of air blower 65b. That is, the control unit 69 performs control to make the output of the air blower fan motor of air blower 65a greater than the output of the air blower fan motor of air blower 65b. 【0155】 In this way, by operating the air blower 65a at a higher output than the air blower 65b, the amount of air drawn in from the intake port 63 can be made greater than the amount of air blown out from the outlet port. This further suppresses the leakage of air from the drying space through the opening into which the hand is inserted. 【0156】 Furthermore, for example, when the air blowers 65a and 65b are running, the airflow rate blown out from the outlet may be greater than the airflow rate blown out from the exhaust port 64. Since the outlet blows out a relatively large amount of air, drying performance can be maintained. 【0157】 Figure 15 is a schematic diagram showing the airflow of another hand drying apparatus according to an embodiment. In the hand drying device 202 shown in Figure 15, an intake port 63b (second intake port) and a flow path section 70b (second flow path section) are provided. In addition, the hand drying device 202, like the hand drying device 200, is provided with a housing 50 having an inner surface 50i and an opening 50A, an intake port 63 (first intake port), outlet ports (first outlet port 61 and second outlet port 62), a flow path section 70 (first flow path section), a blower section 65 (first blower section), a control section 69, a filter section (first filter section 67a and second filter section 67b), a detection section 48, and the like. 【0158】 In this example, the third flow path 73 and the outlet 64 are not provided. However, the third flow path 73 and the outlet 64 may be provided as needed. Also, for simplicity, the water receiving section 82 is not shown in Figure 15. 【0159】 The intake port 63b is an opening provided in the inner surface 50i of the housing 50. The intake port 63b draws in air from the drying space SP. For example, the intake 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 to the inner surface 50i. The side surface of the inner surface 50i is the surface that extends upward from the bottom surface 55, for example, the first surface 51 and the second surface 52 mentioned above. The intake port 63b is located below the outlets (first outlet 61 and second outlet 62). In this example, the intake port 63b opens upward and draws in air from the drying space SP downward. 【0160】 The discharge port 64b discharges the air from the drying space SP that has been drawn in from the intake port 63b to the outside of the drying space SP. For example, the discharge port 64b is an opening provided on the outer surface 50j of the housing 50 and is exposed to the outer surface 50j. In this case, the discharge port 64b discharges the air to the outside of the hand drying device 202, i.e., to the outside of the housing 50. The discharge port 64b is provided, for example, on the bottom surface 95 of the outer surface 50j and opens downwards, discharging the air downwards. This prevents the discharge port 64b from discharging air toward the user. However, the discharge port 64b 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, and the air may be discharged toward the rear or side. 【0161】 The flow path section 70b connects the suction port 63b and the discharge port 64b. The flow path section 70b extends downward from the suction port 63b to the discharge port 64b. Air drawn in from the suction port 63b passes through the flow path section 70b and is discharged from the discharge port 64b. 【0162】 The flow channel 70b is a separate flow channel from the flow channel 70. That is, the flow channel 70 and the flow channel 70b are separate and independent of each other. The flow channel 70b does not merge with the flow channel 70. The flow channel 70b does not share any part of the flow channel with the flow channel 70. 【0163】 The hand drying device 202 may have a blower unit 65c (second blower unit) for drawing air into the intake port 63b. The blower unit 65c is, for example, a blower fan provided in the flow path 70b. The blower unit 65 (first blower unit) and the blower unit 65c (second blower unit) are each blower fans having motors. 【0164】 When the blower unit 65 (first blower unit) is driven, air is generated in the flow path section 70. This draws air from the drying space SP through the intake port 63. The air drawn in through the intake port 63 is blown out through the outlets (first outlet 61 and second outlet 62) and circulates within the hand drying device 202. On the other hand, when the blower unit 65c (second blower unit) is driven, air is generated in the flow path section 70b. This draws air from the drying space SP through the intake port 63b. The air drawn in through the intake port 63b flows downward through the flow path section 70b and is discharged to the outside through the outlet port 64b. 【0165】 In this way, air from within the drying space SP is drawn in through the intake ports 63 and 63b. This prevents air from leaking out of the opening during hand drying, thereby improving usability. Furthermore, since the air drawn in from intake port 63b is exhausted to a place other than the drying space SP through the exhaust port 64b, the airflow rate drawn in from the intake ports (intake ports 63 and 63b) can be made greater than the airflow rate blown out from the outlet, further suppressing air leakage from within the drying space SP through the opening. 【0166】 The operation of the air blower 65 and the air blower 65c is controlled by the control unit 69. When a user inserts a wet hand into the drying space SP through the opening, the detection unit 48 detects the hand. When the detection unit 48 detects a hand, a signal is transmitted from the detection unit 48 to the control unit 69. Upon receiving the signal, the control unit 69 executes a control to drive the air blower 65c. Subsequently, after a predetermined time has elapsed since the start of operation of the air blower 65c, it executes a control to drive the air blower 65. That is, when the detection unit 48 detects a hand, the air blower 65c is driven first, and then, with a delay, the air blower 65 is driven. By driving the air blower 65c before the air blower 65, leakage of air from the drying space SP through the opening can be further suppressed. The predetermined time for delaying the operation of the air blower 65 is, for example, approximately 0.01 seconds to 2.0 seconds, but is not particularly limited and can be determined as appropriate. 【0167】 When a wet hand is withdrawn from the opening to the outside of the drying space SP, the detection unit 48 stops detecting the hand. At this time, the control unit 69 executes a control to stop the operation of the blower unit 65. Subsequently, after a predetermined time has elapsed since the blower unit 65 stopped, the control unit 69 executes a control to stop the operation of the blower unit 65c. That is, when the detection unit 48 no longer detects a hand, the blower unit 65 is stopped, and then, with a delay, the blower unit 65c is stopped. By stopping the operation of the blower unit 65 before the operation of the blower unit 65c, it is possible to effectively suppress the leakage of air from the drying space SP through the opening. The predetermined time for delaying the stopping of the blower unit 65c is, for example, approximately 0.01 seconds to 2.0 seconds, but is not particularly limited and can be set as appropriate. 【0168】 The system is configured to operate the blower unit 65c while the blower unit 65 is operating. In other words, the control unit 69 controls the system so that the blower unit 65c is operated while the blower unit 65 is operating. This effectively prevents air from leaking out of the opening in the drying space. Specifically, while air is being blown out into the drying space SP from the outlet, air from the drying space SP is more easily drawn in from the intake port 63b, thus further preventing air from leaking out of the opening in the drying space SP. 【0169】 Furthermore, when the air blowers 65 and 65c are driven, they operate so that the airflow rate drawn in from the intake port is greater than the airflow rate blown out from the outlet port. This further suppresses the leakage of air from the drying space SP through the opening into which a hand is inserted. In this example, the airflow rate drawn in from the intake port is the sum of the airflow rate drawn in from the intake port 63 and the airflow rate drawn in from the intake port 63b. 【0170】 For example, as shown in Figure 15, if the flow path section 70 is not provided with a third flow path 73 and an outlet 64, the airflow rate in the blower section 65 may be used as the "airflow rate of air blown out from the outlet." Also, in this example, the airflow rate in the blower section 65 may be used as the airflow rate of air drawn in from the intake port 63. Furthermore, for example, the airflow rate in the blower section 65c may be used as the airflow rate of air drawn in from the intake port 63b. 【0171】 When the blower units 65 and 65c are operating, the airflow rate blown out from the outlet may be less than the airflow rate drawn in from the intake port 63b. In other words, when the blower units 65 and 65b are operating, the airflow rate drawn in from the intake port 63 may be less than the airflow rate drawn in from the intake port 63b. This further suppresses the leakage of air from the drying space through the opening into which the hand is inserted. 【0172】 Alternatively, when the blower units 65 and 65c are operating, the airflow rate blown out from the outlet may be greater than the airflow rate drawn in from the intake port 63b. In other words, when the blower units 65 and 65c are operating, the airflow rate drawn in from the intake port 63 may be greater than the airflow rate drawn in from the intake port 63b. In this case, the outlet blows out a relatively large amount of air, improving drying performance. 【0173】 For example, the air blower 65 and the air blower 65c operate such that the output of the air blower 65c is greater than the output of the air blower 65. The control unit 69 performs control to make the output of the air blower fan motor of the air blower 65c greater than the output of the air blower fan motor of the air blower 65. In this way, by operating the air blower 65c with a greater output than the air blower 65, the amount of air drawn in from the intake port can be made greater than the amount of air blown out from the outlet port. This makes it possible to further suppress the leakage of air from the drying space through the opening into which hands are inserted. 【0174】 Alternatively, the air blowers 65 and 65c operate such that the output of air blower 65 is greater than the output of air blower 65c. The control unit 69 performs control to make the output of the air blower fan motor of air blower 65 greater than the output of the air blower fan motor of air blower 65c. In this way, by operating air blower 65 with a greater output than air blower 65c, the amount of air blown out from the outlet can be increased. In this case, the outlet blows out a relatively large amount of air, improving drying performance. 【0175】 The hand drying device 202 may further have a filter section 67c. The filter section 67c is provided in the flow path section 70b and is located upstream or downstream of the air blower section 65c. By providing the filter section 67c, the air discharged from the outlet 64b can be made cleaner. 【0176】 The air blower 65c may be provided as needed and may be omitted as appropriate. For example, even if the air blower 65c is not provided, the air in the drying space SP may be discharged outside the drying space SP from the intake port 63, the flow path 70b, and the exhaust port 64c by a ventilation duct of the building in which the hand drying device 202 is installed and a fan provided in that ventilation duct. On the other hand, if the air blower 65c is provided, it is easier to increase the airflow volume of air drawn in from the intake port 63 and the intake port 63b, and it is possible to further suppress the leakage of air from the drying space through the opening into which hands are inserted. 【0177】 Figure 16 is a schematic diagram showing the airflow of another hand drying apparatus according to an embodiment. In the hand drying device 203 shown in Figure 16, an outlet 64c and an outside air intake 66 are provided. Instead of the flow path section 70, a flow path section 70c (first flow path section) and a flow path section 70d (second flow path section) are provided. Instead of the blower section 65, a blower section 65d (first blower section) and a blower section 65e (second blower section) are provided. In addition, the hand drying device 203, like the hand drying device 200, is provided with a housing 50 having an inner surface 50i and an opening 50A, an intake port 63 and an outlet (first outlet 61 and second outlet 62), a control unit 69, a filter section (first filter section 67a), a detection unit 48, a water receiving section 82, etc. 【0178】 The discharge port 64c discharges the air from the drying space SP, which has been drawn in from the intake port 63, to the outside of the drying space SP. For example, the discharge port 64c is an opening provided on the outer surface 50j of the housing 50 and is exposed to the outer surface 50j. In this case, the discharge port 64c discharges the air to the outside of the hand drying device 203, i.e., to the outside of the housing 50. The discharge port 64c is provided, for example, on the bottom surface 95 of the outer surface 50j and opens downwards, discharging the air downwards. This prevents the discharge port 64c from discharging air toward the user. However, the discharge 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, and the air may be discharged towards the rear or side. 【0179】 The outside air intake 66 draws in air from outside the drying space SP. For example, the outside air intake 66 is an opening provided on the outer surface 50j of the housing 50 and is exposed to the outer surface 50j. In this case, the outside air intake 66 takes in air from outside the hand drying device 203, i.e., from outside the housing 50. For example, the outside air intake 66 is provided on the bottom surface 95 of the outer surface 50j and opens downwards, drawing in air downwards. However, the outside air intake 66 may also be provided on the front 91, back 92, right side 93, or left side 94 of the outer surface 50j. 【0180】 The flow path section 70c connects the suction port 63 and the discharge port 64c. In this example, the flow path section 70c extends downward from the suction port 63 to the discharge port 64c. Air drawn in from the suction port 63 passes through the flow path section 70c and is discharged from the discharge port 64c. 【0181】 The flow path section 70d connects the outside air intake port 66 and the outlets (first outlet port 61 and second outlet port 62). The flow path section 70d has a flow path 72a leading to the first outlet port 61 and a flow path 72b leading to the second outlet port 62. In this example, the flow path section 70d extends upward from the outside air intake port 66 and branches into flow path 72a and flow path 72b. Air drawn in from the outside air intake port 66 passes through the flow path section 70d and is blown out into the drying space SP from the outlets (first outlet port 61 and second outlet port 62). 【0182】 The flow channel 70c is a separate flow channel from the flow channel 70d. That is, the flow channel 70c and the flow channel 70d are separate and independent of each other. The flow channel 70c does not merge with the flow channel 70d. The flow channel 70c does not share any part of the flow channel with the flow channel 70d. 【0183】 In this example, the third flow path 73 and the outlet 64 are not provided. However, the third flow path 73 and the outlet 64 may be provided as needed. 【0184】 The blower unit 65d is located in the flow path section 70c and draws air into the intake port 63. The blower unit 65e is located in the flow path section 70d and draws air into the outside air intake port 66. Both the blower unit 65d and the blower unit 65e are blower fans equipped with motors. 【0185】 When the blower unit 65d is driven, air is generated in the flow path section 70c. This draws air from the drying space SP through the intake port 63. The air drawn in from the intake port 63 flows downward through the flow path section 70c and is discharged to the outside through the outlet port 64c. On the other hand, when the blower unit 65e is driven, air is generated in the flow path section 70d. This draws outside air through the outside air intake port 66. The air drawn in from the outside air intake port 66 flows upward through the flow path section 70d and is blown into the drying space SP through the first outlet port 61 via the flow path 72a, or through the second outlet port 62 via the flow path 72b. 【0186】 Even in a hand drying device that takes in air from the outside and discharges it to the outside through an intake port in the drying space, there is a risk that the air blown into the drying space may not be sufficiently drawn in through the intake port and may leak out through the opening into which the hands are inserted. In contrast to this, in the hand drying device 203, the air blowers 65d and 65e are operated so that the airflow rate drawn in through the intake port 63 is greater than the airflow rate blown out through the outlet port. 【0187】 In this way, air is drawn in from the drying space SP through the intake port 63. This prevents air from leaking out of the opening while hands are drying, improving usability. Furthermore, the airflow rate drawn in from the intake port 63 can be made greater than the airflow rate blown out from the outlet, further suppressing air leakage from the drying space SP through the opening where hands are inserted. 【0188】 For example, as shown in Figure 16, if the flow path section 70d is not provided with a third flow path 73 and an outlet 64, the airflow rate in the blower section 65e may be used as the "airflow rate of air blown out from the outlet." Alternatively, for example, the airflow rate in the blower section 65d may be used as the airflow rate of air drawn in from the intake port 63. 【0189】 For example, the air blowers 65d and 65e operate such that the output of air blower 65d is greater than the output of air blower 65e. The control unit 69 performs control to make the output of the air blower fan motor of air blower 65d greater than the output of the air blower fan motor of air blower 65e. In this way, by operating air blower 65d with a greater output than air blower 65e, the amount of air drawn in from the intake port can be made greater than the amount of air blown out from the outlet port. This makes it possible to further suppress the leakage of air from the drying space through the opening into which hands are inserted. 【0190】 The operation of the air blower 65d and the air blower 65e is controlled by the control unit 69. When a user inserts a wet hand into the drying space SP through the opening, the detection unit 48 detects the hand. When the detection unit 48 detects a hand, a signal is transmitted from the detection unit 48 to the control unit 69. Upon receiving the signal, the control unit 69 executes a control to drive the air blower 65d. Subsequently, after a predetermined time has elapsed since the start of operation of the air blower 65d, the control unit 69 executes a control to drive the air blower 65e. That is, when the detection unit 48 detects a hand, the air blower 65d is driven first, and then, with a delay, the air blower 65e is driven. By driving the air blower 65d before the air blower 65e, leakage of air from the drying space SP through the opening can be further suppressed. The predetermined time for delaying the operation of the air blower 65e is, for example, approximately 0.01 seconds to 2.0 seconds, but is not particularly limited and can be determined as appropriate. 【0191】 When a wet hand is withdrawn from the opening to the outside of the drying space SP, the detection unit 48 stops detecting the hand. At this time, the control unit 69 executes a control to stop the operation of the blower unit 65e. Subsequently, after a predetermined time has elapsed since the operation of the blower unit 65e stopped, the control unit 69 executes a control to stop the operation of the blower unit 65d. That is, when the detection unit 48 no longer detects a hand, the operation of the blower unit 65e is stopped, and then, with a delay, the operation of the blower unit 65d is stopped. By stopping the operation of the blower unit 65e before the operation of the blower unit 65d, it is possible to effectively suppress the leakage of air from the opening in the drying space SP. The predetermined time for delaying the stopping of the operation of the blower unit 65d is, for example, about 0.01 seconds to 2.0 seconds, but is not particularly limited and can be set as appropriate. 【0192】 The system is configured to operate the blower unit 65d while the blower unit 65e is operating. In other words, the control unit 69 controls the system so that the blower unit 65d is operated while the blower unit 65e is operating. This effectively prevents air from leaking out of the opening in the drying space. Specifically, while air is being blown out into the drying space SP from the outlet, air from the drying space SP is more easily drawn in from the intake port 63, thus further preventing air from leaking out of the opening in the drying space SP. 【0193】 As shown in Figure 16, the first filter section 67a is located upstream of the air blower section 65e in the flow path section 70d. The first filter section 67a can clean the air blown from the outlet into the drying space SP. 【0194】 The hand drying device 203 may further have a filter section 67d. The filter section 67d is provided in the flow path section 70c and is located upstream or downstream of the air blower section 65d. By providing the filter section 67d, the air discharged from the outlet 64c can be made cleaner. 【0195】 As mentioned above, for high-speed drying, it is desirable that the outlets blow air at high speed. Specifically, for example, when the blower unit for supplying air to the outlets is in operation, the air velocity of the air blown out from each outlet (each of the first outlet 2a, second outlet 4a, first outlet 61, and second outlet 62) is 90 m / s (meters per second) or more, preferably 92 m / s or more. Also, when the blower unit for supplying air to the outlets is in operation, the air volume blown out from the outlets (the sum of the air volume blown out from each of the first outlets 2a and each of the second outlets 4a, or the sum of the air volume blown out from each of the first outlets 61 and each of the second outlets 62) is 2.0 m 3 / h (cubic meters per hour) or more, preferably 2.2m 3 The airflow rate is 1 / h or more. This enables high-speed drying, allowing the user's hands to be dried in, for example, about 10 seconds. However, in hand drying devices capable of high-speed drying by blowing air at high speed, a large amount of air is forcefully blown out from the outlet, so there was a possibility that the air coming out of the outlet would not be sufficiently drawn in from the intake port in the drying space and would leak out from the opening into which the hands are inserted. For example, if the wind force is strong, the wind that hits the user's hands etc. tends to diffuse into the surroundings, so there is a risk that it will not be drawn in from the intake port and will leak out from the opening into which the hands are inserted. In contrast, according to the hand drying devices 100, 200~203 of the embodiment, as already mentioned, the possibility that the air coming out of the outlet will leak out from the opening into which the hands are inserted instead of the intake port can be further reduced. Note that the comparison of airflow (or output) may be made in at least a part of the state excluding transient states of airflow (or output), such as immediately after the start of operation of each air blower unit. 【0196】 As described above, according to the embodiment, a hand drying device capable of improving quality can be provided. 【0197】 Embodiments of the present invention have been described above. However, the present invention is not limited to these descriptions. 【0198】 In the embodiment of the present invention, the suction port 10 was provided at the bottom 8, but it may also be provided at, for example, the first wall portion 2 or the second wall portion 4. 【0199】 With respect to the embodiments described above, those modified by those skilled in the art are also included within the scope of the present invention, as long as they retain the features of the present invention. For example, the shape, dimensions, material, arrangement, etc., of each element of the hand drying apparatus 100, 200-203 are not limited to those exemplified and can be modified as appropriate. 【0200】 Furthermore, the elements of each of the embodiments described above can be combined to the extent technically possible, and these combinations are also included within the scope of the present invention insofar as they include the features of the present invention. [Explanation of symbols] 【0201】 2 1st wall 2a First air outlet 4 Second wall 4a Second air outlet 6 Wall 8 bottom 10 Inlet 12. Air blower 14 Flow channel section 16. Filter section 18 Suction channel 20 Circulation channels 22 Outlet 24 Discharge channel 25 Heating section 26. First air blower unit 28. Second air blower unit 30 Water receiving section 32 Water receiving tray 34. First filter section 36 Second filter section 38 Third filter section 40 Detection unit 42 Control Unit 44 Intake 46 Intake channel 48 Detection unit 50 cabinets 50A opening 50i inner surface 50j outer surface 51 - 54 First - Fourth surfaces 55 bottom surface 56 lower case member 57, 59 rib 61 First blowing outlet 62 Second blowing outlet 63, 63b suction port 64, 64b, 64c discharge port 65, 65a - 65e blowing part 66 outside air suction port 67 filter 67a First filter part 67b Second filter part 67c, 67d filter part 68 heating part 69 control part 70, 70b, 70c, 70d flow path part 71 First flow path 72 Second flow path 72a, 72b flow path 73 Third flow path 80 drain outlet 81 water channel 82 water receiving part 83 water channel 84 water receiving part 85 drain outlet 86 partition 87 drain cap 88 water level sensor 91 front side 91a, 91b cover 92 back side 93 right side [[ID=7(4]]94 left side 95 bottom surface 100, 200 - 203 hand dryer

Claims

[Claim 1] A housing having an inner surface and an opening for the user to insert their hand into the drying space enclosed by the inner surface, An intake port is provided on the inner surface for drawing in air from the drying space, An outlet is provided on the inner surface for blowing air into the drying space, A flow path section connecting the aforementioned suction port and the aforementioned discharge port, A blower is provided in the flow path section and causes air to be drawn into the intake port, and at least a portion of the air drawn into the intake port is blown out from the outlet through the flow path section, In the aforementioned flow path section, an outlet is provided upstream of the blowing port, and when the blowing unit is driven, an outlet is provided that discharges a portion of the air drawn in from the intake port out of the flow path section, A detection unit that detects the user's hands, Equipped with, The detection unit is configured to draw air in through the intake port when it detects the user's hand, and to discharge a portion of the air drawn in through the intake port through the exhaust port. The opening is formed above the drying space, The aforementioned intake port is provided at the lower part of the inner surface of the housing and is positioned facing upward. The flow path section has a first flow path extending downward from the suction port, and a second flow path provided downstream of the first flow path and extending upward from below toward the discharge port. The hand drying device is characterized in that the discharge port discharges air from the middle of the second flow path. [Claim 2] The hand drying device according to claim 1, characterized in that the air blowing unit operates such that the airflow rate blown out from the outlet is less than the airflow rate drawn in from the intake port and greater than the airflow rate blown out from the exhaust port. [Claim 3] The hand drying device according to claim 1, characterized in that the discharge port is provided on any of the outer surfaces of the right side, left side, bottom, and back of the housing. [Claim 4] The aforementioned flow path section further comprises a filter section, The filter section is located in the flow path section upstream of the air blowing section. The hand drying apparatus according to claim 1, characterized in that the discharge port discharges air from the flow path downstream of the air blowing section.

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