JP2013153922A - Hand dryer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hand dryer installed on a washstand for blowing air to a hand of a user to dry it, which is the hand dryer capable of blowing the air of a sufficient flow rate to the hand of the user without enlarging a blower.SOLUTION: This hand dryer 1 includes a first air flow path 30 opened to the outside at both ends so that air passes through from an inlet 32 to an outlet 31, and from a slit-like opening 40 formed on a flow path wall of the first air flow path 30, the air supplied from a blower is blown off toward the inside of the first air flow path 30. More on the downstream side than the opening 40 in the first air flow path 30, a curved part 35 where the inner surface of the flow path wall is curved is formed, and at least a part of the air jetted from the opening 40 flows along the curved part 35 and then turns to the outlet 31 along the flow path wall of the first air flow path 30.

Description

  The present invention relates to a hand drying apparatus that blows air on a user's hand to dry the hand.

  In recent years, especially in public toilets and the like, there is an increasing tendency to reduce paper towels for wiping off water adhering to hands after hand washing, and there is an increasing number of cases where hand dryers are installed instead of paper towels. Such a hand-drying device is generally installed on the wall surface on the washstand slightly away from the place where the washbasin is arranged, or on the wall surface of the toilet space away from the washstand.

  The user often does not use the hand dryer in the case where only the fingertips of the hand are lightly washed instead of washing the entire hand with water. This seems to be because it is troublesome to move to the place where the hand dryer is installed in order to dry a small amount of water on the fingertip.

  On the other hand, the following patent document 1 proposes a hand-drying device that is intended to be installed on a wash basin so as to blow air toward the inner surface of the wash bowl. If the hand dryer is installed on the wash basin, the user can dry his hands immediately on the spot after the hand wash is completed, without having to walk from the front of the wash basin to other places. . For this reason, even if it is a case where only a fingertip is washed lightly, a user does not bother to use a hand dryer, but can use a hand dryer easily.

JP 2006-192250 A

  In order to dry the user's hand in a short time, it is necessary to make the flow rate of air blown to the user's hand a large flow rate. However, in the hand dryer installed in the washstand, there has been a problem that it is difficult to sufficiently increase the flow rate of the air to be blown.

  This is due to the following reasons. When installing the hand dryer on the wash basin, the main body with the air outlet is formed on the top of the wash bowl, but if other structures are installed on the wash bowl, Deteriorates the usability of the stand. Although the hand dryer includes a blower for generating a flow of air blown from the blowout port, the blower cannot be installed on the upper part of the wash bowl for the above reason. For this reason, it is necessary to install a blower in the position away from the main-body part like the lower part of a wash bowl, for example.

  When a blower is installed at a position away from the main body (blower), air supplied from the blower is guided to the blower by a long pipe. As a result, the flow path resistance of the piping becomes large, and the flow rate of the air blown out from the air outlet becomes small. In the conventional hand dryer as described in Patent Document 1, all the air blown out from the air outlet is supplied from the blower. For this reason, in order to enlarge the flow volume of the air which blows off from a blower outlet, it was necessary to enlarge a fan. However, when the blower is increased in size, the installation space for the blower is limited and noise is increased.

  This invention is made in view of such a subject, The objective is the hand-drying apparatus installed in a washbasin and spraying air on a user's hand and drying, Comprising: A fan is enlarged. It is another object of the present invention to provide a hand-drying device that can blow a sufficient amount of air onto a user's hand.

  In order to solve the above problems, a hand dryer according to the present invention is installed in a wash basin, and in a hand dryer that blows air on a user's hand to dry, both ends are opened to the outside so that air can pass through. A flow path, an inflow port that is an air inlet formed on one end side, an air outlet that is an air outlet formed on the other end side, and a space through which air passes from the inflow port to the air outlet. A first air flow path having a defining flow path wall, and a slit-like opening formed in the flow path wall along a direction perpendicular to a direction from the inflow port toward the blowout port. A jet part for jetting air from the opening toward the inside of the first air flow path, a blower for generating a flow of air jetted from the jet part, and the blower and the jet part. A second air flow path to connect, the first air A curved portion in which an inner surface of the flow channel wall is curved is formed on the downstream side of the ejection portion in the flow channel, and at least a part of the air ejected from the ejection portion is the curved portion. After flowing along the curved portion, it is formed so as to go to the outlet along the flow path wall.

  In the present invention, both ends of the flow path are open to the outside so that air can pass through, and an air inlet that is an air inlet formed at one end and an air outlet that is an air outlet formed at the other end. And a first air flow path having an outlet. As described below, air passes through the first air flow path from the inlet to the outlet and is then blown onto the user's hand.

  A flow path wall defining a space through which air passes from the inflow port to the blowout port is provided with an ejection portion having a slit-like opening. Moreover, the ejection part is connected with the air blower by the second air flow path. For this reason, the air supplied from the blower is ejected from the ejection part toward the inside of the first air channel after passing through the second air channel.

  A curved portion in which the inner surface of the flow channel wall is curved is formed on the downstream side of the ejection portion in the first air flow channel. At least a part of the air ejected from the ejection part changes its flow direction while flowing along the curved surface by the Coanda effect, and after passing through the curved part, along the flow path wall of the first air flow path. And flow toward the outlet. In other words, the curved portion is formed so that at least a part of the air ejected from the ejection portion has the flow as described above.

  The ejection part has a slit-like opening formed so as to be along a direction perpendicular to the direction from the inlet to the outlet, and air is ejected from the opening. For this reason, the air supplied from the blower is ejected from the ejection part at a high flow rate, and most of the air flows along the curved part and then flows toward the outlet along the flow path wall.

  When an air flow toward the outlet along the flow path wall is generated, the first air flow path is present in a portion away from the flow path wall (a portion near the center of the cross section of the first air flow path). Since air is subjected to viscous shear stress, it tends to flow toward the outlet. As a result, a negative pressure is generated on the upstream side of the first air flow path. Since the inlet formed on the upstream side of the first air channel is open to the outside, a large amount of air is drawn into the inlet by the negative pressure and flows into the first air channel, and then toward the outlet. Flowing. Thereby, the air which ejected from the ejection part and the air which flowed into the inflow port from the outside merge, and are blown out from the air outlet.

  Thus, in the present invention, not only the air supplied from the blower is blown out from the blower outlet, but the air supplied from the blower and the air flowing into the inlet from the outside are combined and blown out from the blower outlet. For this reason, the air of a big flow volume can be sprayed on a user's hand, without using a large sized blower.

  Moreover, in the hand dryer according to the present invention, the first air flow path is formed so that the cross-sectional area of the flow path becomes larger as it is closer to the air outlet on the downstream side of the ejection portion. Is also preferable.

  In this preferred embodiment, the flow passage cross-sectional area of the first air flow channel on the downstream side of the ejection portion is formed so as to increase as the position is closer to the outlet. That is, the first air channel is formed so that the channel cross-sectional area increases as it goes downstream from the ejection part.

  By forming the first air flow path so that the cross-sectional area of the flow path in the vicinity of the ejection portion is relatively small, it is effective for the air in the center of the first air flow path (the central part in the flow path cross section). A viscous shear force can be applied to the. Moreover, the flow path resistance in the vicinity of the blower outlet is reduced by forming the flow path cross-sectional area larger as it goes downstream from the ejection part. Accordingly, it is possible to further increase the flow rate of the air blown from the outlet through the first air flow path.

  Moreover, in the hand dryer which concerns on this invention, it is also preferable to provide the water discharging part which discharges so that water may pass the inside of said 1st air flow path toward the said blower outlet from the said inflow port.

  In this preferable aspect, the water discharging part which discharges so that water may pass the inside of a 1st air flow path from an inflow port toward a blower outlet is provided. Since the water will be discharged from the same location as the air outlet that blows out the air, the user of the washstand will wash the hands with the water discharged from the water discharger, and then the air will be blown out from the outlet without changing the position of the hand. A hand can be applied to dry the hand. Since a series of operations from hand washing to drying can be completed without changing the position of the hand, usability of the washstand can be improved.

  Moreover, in the hand dryer which concerns on this invention, it is also preferable to discharge water from the said water discharging part in the state which is discharging the air from the said discharge part.

  In this preferable aspect, water is discharged from the water discharge portion while air is being discharged from the discharge portion. By setting it as such a structure, the discharged water will flow, being accelerated by air in the state surrounded by the air which flows toward the blower outlet. As a result, the flow rate of the discharged water increases while passing through the first air flow path, and further, the water flows while being scattered in various directions perpendicular to the discharge direction due to the influence of the air flow. . That is, since a large flow rate of water can be applied over a wide range to the user's hand, a high cleaning effect can be obtained.

  In the hand dryer according to the present invention, it is also preferable that the water discharger discharges water toward the center of the cross section of the first air flow path.

  In this preferable aspect, the water discharger discharges water toward the center in the cross section of the first air flow path. As a result, the flow rate of the discharged water can be increased efficiently, and a higher cleaning effect can be obtained.

  Moreover, in the hand dryer according to the present invention, the water discharge portion has a water discharge port that is opened as an outlet of water, and a plane including an inner edge of the water discharge port is inclined with respect to the water discharge direction of the water discharge portion. It is also preferable that it is formed as follows.

  In this preferred embodiment, the water discharge portion is formed such that a plane including the inner edge of the water discharge port opened as the water outlet is inclined with respect to the water discharge direction. For this reason, when the water to be discharged passes through the water discharge port, only one side thereof is in contact with the air, and immediately after that, the entire surface is in contact with the air and discharged. As a result, the discharged water entrains the surrounding air when passing through the outlet and flows in a state containing a large amount of bubbles, so that a high cleaning effect can be obtained even with a small amount of discharged water.

  In the hand dryer according to the present invention, it is also preferable that the water discharge section includes a movable mechanism that changes the position of the water discharge port in the direction of the central axis of the first air flow path.

  In this preferable aspect, the water discharge part is provided with the movable mechanism, and the position of the water discharge port changes in the central axis direction of the first air flow path by the movable mechanism. When the position of the spout changes in this way, the positional relationship between the spout and the spout changes. The water discharged from the water discharge part flows while being scattered in various directions perpendicular to the water discharge direction due to the influence of the air flowing through the first air flow path. It depends on the positional relationship.

  For example, when the position of the water discharge port is on the upstream side with respect to the ejection part, the way the water scatters becomes large, and the water is spread like a shower and discharged. On the other hand, when the position of the water discharge port is on the downstream side of the curved portion, the water scatters less and water is discharged straight. For this reason, it becomes possible to change the aspect of water discharge according to the request of the user who performs hand washing by changing the position of the water discharge port by the movable mechanism.

  According to the present invention, it is a hand-drying device that is installed on a wash basin and blows air to a user's hand to dry it, and blows air with a sufficient flow rate to the user's hand without increasing the size of the blower. It is possible to provide a hand-drying apparatus that can

It is a figure which shows the state which installed the hand-drying apparatus which is 1st embodiment of this invention in the washstand. It is a schematic diagram for demonstrating the whole structure of the hand dryer shown in FIG. It is the perspective view which showed the state which cut | disconnected the hand dryer shown in FIG. It is sectional drawing which expanded and showed a part of hand-drying apparatus shown in FIG. It is sectional drawing which expanded and showed a part of hand-drying apparatus shown in FIG. It is sectional drawing which expanded and showed a part of hand drying apparatus which is 2nd embodiment of this invention. It is sectional drawing which expanded and showed a part of hand drying apparatus which is 2nd embodiment of this invention. It is sectional drawing which expanded and showed a part of hand drying apparatus which is 2nd embodiment of this invention. It is sectional drawing which expanded and showed a part of hand drying apparatus which is 2nd embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In order to facilitate the understanding of the description, the same constituent elements in the drawings will be denoted by the same reference numerals as much as possible, and redundant description will be omitted.

  Drawing 1 is a figure showing the state where the hand dryer which is the first embodiment of the present invention was installed in the washstand. As shown in FIG. 1, the wash basin L has a counter part LC formed so that the surface is horizontal, and a wash basin which is a part for collecting water at the center of the counter part LC. A bowl portion LB is formed. The wash bowl portion LB has an elliptical shape when viewed from above, and is formed by recessing the center of the counter portion LC so that the surface thereof is a smooth curved surface.

  A faucet F is erected on the back side of the wash bowl portion LB in the counter portion LC with the water discharge direction of the water discharge port FH facing the wash bowl portion LB. The faucet F discharges water from the spout FH toward the wash bowl portion LB, similar to the one installed in the conventional wash basin. In the present embodiment, the main body 10 of the hand dryer 1 is configured integrally with the faucet F.

  That is, the water outlet FH of the faucet F is not only an outlet for water to be discharged, but also an outlet 31 for blowing out air for drying the user's hand. For this reason, the faucet F is connected to a water supply for supplying water to be discharged, and is also connected to a blower AP for generating a flow of air to be blown out.

  FIG. 2 is a schematic diagram for explaining the overall configuration of the hand dryer 1. As shown in FIG. 2, a blower AP is installed below the counter unit LC of the wash basin L in the hand dryer 1. The blower AP is a device for generating a flow of air blown from the blower outlet 31 of the hand drying device 1. When the blower AP blows air from the blower outlet 31, it receives a blow start signal from a control device (not shown) to operate the internal fan, and the air is supplied from the air supply part AS formed on the upper surface thereof to the main body part 10. And supply.

  Below the counter part LC, the air supply part AS and the lower end of the main body part 10 (water faucet F) of the hand dryer 1 are connected by a blower pipe ASP made of a flexible hose. A second air flow path 20 (not shown in FIG. 2), which is an air flow path formed along the longitudinal direction from the lower end, is formed inside the main body portion 10. For this reason, the air emitted from the air supply part AS of the blower AP is supplied to the second air flow path 20 through the blower pipe ASP. The hand dryer 1 blows air from the blower outlet 31 toward the user's hand when air is supplied to the second air flow path 20. This will be described in detail later.

  A water supply pipe WP is connected in the vicinity of the connecting portion between the blower pipe ASP and the main body 10. The water supply pipe WP is connected to the water supply via a solenoid valve (not shown). The main body portion 10 is formed with an internal water channel IW (not shown in FIG. 2) that is a flow path through which water flows toward the water discharge port FH. Is connected to the water supply pipe WP. When the solenoid valve is opened by sending a valve opening signal from the control device, water from the water supply flows through the water supply pipe WP and the internal water channel IW, and then from the water outlet FH (air outlet 31). Water is discharged toward the hand.

  Subsequently, the structure in the vicinity of the air outlet 31 in the main body 10 will be described with reference to FIGS. 3 and 4. FIG. 3 is a perspective view showing a state in which the hand dryer 1 is cut in the vicinity of the air outlet 31. FIG. 4 is an enlarged cross-sectional view of a part of the hand dryer 1 in the vicinity of the air outlet 31. As shown in FIG. 3, the main body 10 has a first air flow path 30 that is a linear air flow path having both ends opened to the outside air.

  The first air flow path 30 has an inflow port 32 that is an opening formed at the upper end thereof, a funnel portion 33 that is a flow path formed so as to decrease in diameter as it goes downward from the inflow port 32, and a funnel portion 33. And a main channel 36 which is a channel extending further downward from the lower end of the main channel 36. At the lower end of the main flow path 36, an air outlet 31 that is an outlet for air flowing toward the user's hand is formed. The funnel portion 33 and the main flow path 36 are arranged so that their central axes coincide. Thus, the 1st air flow path 30 is comprised so that the external air which flowed in from the inflow port 32 can be blown out from the blower outlet 31 outside.

  An opening 40 is formed between the lower end portion of the funnel portion 33 and the upper end portion of the main flow path 36 in the wall surface defining the first air flow path 30. The opening 40 is a portion opened in a slit shape along a direction perpendicular to the direction from the inlet 32 toward the outlet 31 (the central axis direction of the first air flow path 30).

  The first air flow path 30 is connected to the second air flow path 20 through the opening 40. As already described, one end (lower end) of the second air flow path 20 is connected to the blower pipe ASP. Further, as shown in FIGS. 3 and 4, the other end is connected to the opening 40. For this reason, the air supplied from the blower AP is ejected from the opening 40 toward the inside of the first air flow path 30 after passing through the second air flow path 20.

  The main channel 36 has a curved portion 35 in the vicinity of its upper end (the end adjacent to the opening 40). The curved portion 35 is a part of the wall surface defining the main flow path 36 and is formed so as to increase in diameter as it goes upward. In a plane passing through the central axis of the main flow path 36 (that is, a cut surface in FIG. 4), an angle θ formed by a tangent line that touches a specific point A of the curved portion 35 and the central axis of the main flow path 36 is point A is an opening. The curved portion 35 is formed so that the position closer to 40 becomes larger (closer to 90 degrees) and the point A becomes smaller (closer to 0 degrees) farther from the opening 40.

  Further below the lower end of the curved portion 35 (reference numeral B in FIG. 4), the main flow path 36 is formed so as to increase in diameter as it goes downward. That is, the channel cross-sectional area is increased as the position is closer to the air outlet 31.

  The internal water channel IW is a water flow channel formed above the second air flow channel 20 in the inside of the main body 10, and as described above, the internal water channel IW has one end (lower end). It is connected to the water supply pipe WP. Further, as shown in FIGS. 3 and 4, the other end of the internal water channel IW protrudes in a direction substantially parallel to the central axis direction of the second air flow channel 20 at the upper part of the funnel portion 33, and then faces downward. The water discharge part 52 bent is formed. At the lower end of the water discharge part 52, a water discharge port 53 opened as an outlet for water is formed. The water discharge portion 52 has a central axis that coincides with the central axis of the main flow path 36. For this reason, the water discharged from the water discharge port 53 flows from the outlet 31 toward the wash bowl after passing through the central axis of the main flow path 36. As a result, as already described, the air outlet 31 is a water outlet FH of the faucet F.

  The main flow path 36 of the first air flow path 30 is formed inside a flow path wall unit FU that is fixed in a screwed state with respect to the main body 10. The flow path wall unit FU is formed with a male screw portion 12 that is screwed with a female screw portion 11 formed in the main body portion 10, and is rotated around the central axis of the main flow channel 36, whereby the center of the main flow channel 36. It can move along the axis. That is, it is possible to adjust the size (opening degree) of the opening 40 formed in a slit shape by changing the position of the flow path wall unit FU.

  Next, the flow of air when air is blown out from the hand dryer 1 toward the user's hand will be described with reference to FIG. FIG. 5 is an enlarged cross-sectional view of a part of the hand dryer 1 in the vicinity of the air outlet 31, and shows the same cross section as FIG. 4.

  When a blow start signal is sent from the control device to the blower AP, the blower AP operates an internal fan and starts supplying air to the second air flow path 20. The air supplied from the blower AP passes through the blower pipe ASP from the air supply part AS of the blower AP and is supplied to the second air flow path 20 of the main body part 10. At this time, the flow of air inside the second air flow path 20 is shown as an air flow AFL0 in FIG.

  The air that has passed through the second air flow path 20 passes through the opening 40 and is ejected toward the inside of the first air flow path 30. The air injection direction immediately after being injected from the opening 40 is perpendicular to the central axis of the first air flow path 30. Here, at a position in the vicinity of the opening 40 in the bending portion 35, air is jetted in a direction substantially along a plane in contact with the bending portion 35. For this reason, most of the air injected from the opening 40 gradually changes its flow direction while flowing along the surface of the curved portion 35 due to the Coanda effect.

  At the lower end of the curved portion 35, the curved portion 35 and the flow path wall of the main flow path 36 are smoothly connected, and the normal direction of the flow path wall surface of the first air flow path 30 is that of the main flow path 36 in the portion. It is substantially perpendicular to the central axis. For this reason, the air that is ejected from the opening 40 and flows along the surface of the curved portion 35 flows toward the outlet 31 along the flow path wall of the main flow path 36. Such an air flow is illustrated as an air flow AFL1 in FIG.

  When the air flow AFL1 along the flow path wall of the main flow path 36 is generated, the air existing in the part away from the flow path wall of the main flow path 36 (the part close to the central axis of the main flow path 36) receives viscous shear stress. Like the airflow AFL1, the airflow AFL1 tends to flow toward the outlet 31. As a result, a negative pressure is generated on the upstream side of the first air flow path 30.

  Since the inflow port 32 formed on the upstream side of the first air flow path 30 is open to the outside, when a negative pressure is generated inside the first air flow path 30, a large amount of air flows into the inflow port due to the negative pressure. 32. Such an air flow is illustrated as an air flow AFL2 in FIG.

  The air drawn into the inlet 32 then flows into the first air flow path 30 and flows toward the outlet 31. That is, the air that is ejected from the opening 40 and flows along the surface of the curved portion 35 (the air flow AFL1 that is the majority of the airflow AFL0), and is drawn into the inlet 32 and flows into the first air flow path 30. The air (air flow AFL 2) joins in the main flow path 36, then flows toward the air outlet 31, and then blows out from the air outlet 31. Such an air flow is illustrated as an air flow AFL3 in FIG.

  As described above, the airflow AFL3 flowing from the blower outlet 31 toward the user's hand is drawn into the inlet 32 from the outside with respect to the air (airflow AFL0) supplied from the blower AP to the main body 10. Since the air (air flow AFL2) is added, the flow rate is larger than the air (air flow AFL0) supplied from the blower AP to the main body 10. That is, the hand dryer 1 can blow out air having a larger flow rate than the flow rate of the air supplied by the blower AP from the blower outlet 31 toward the user's hand.

  Further, below the lower end of the curved portion 35, the main flow path 36 is formed so as to increase in diameter as it goes downward. That is, the vicinity of the opening 40 in the main channel 36 is formed so that the channel cross-sectional area decreases, and the channel cross-sectional area increases so as to go downstream from there.

  As a result, since the cross-sectional area of the channel in the vicinity of the opening 40 is relatively small, the viscous shear force is effectively applied to the air in the center of the first air channel 30 (the center in the channel cross-section). It is possible to add. Moreover, the flow path resistance in the vicinity of the blower outlet 31 is reduced by forming the flow path cross-sectional area larger from the opening 40 toward the downstream side. Therefore, the flow rate of the air blown out from the outlet 31 through the first air passage 30 is further increased.

  In the present embodiment, the slit-shaped opening 40 is formed as a circumferentially continuous opening around the central axis of the first air flow path 30, but the effect of the present invention is achieved. Therefore, the present invention is not limited to such a form.

  For example, a plurality of rectangular openings having long sides and short sides may be formed. In this case, if the length of the long side is at least five times the length of the short side, most of the air ejected from the second air flow path 20 toward the first air flow path 30 is the curved portion 35. By flowing along, the air flow toward the blowout port 31 along the wall surface of the main flow path 36 can be formed.

  Next, the water discharged from the faucet F will be described with reference to FIG. As already described, water discharge from the faucet F is performed from the water discharge portion 52 provided in the upper part of the first air flow path 30. A water outlet 53 is formed in the water discharge portion 52, and water discharged from the water outlet 53 flows from the outlet 31 toward the wash bowl after passing through the central axis of the main flow path 36.

  In the present embodiment, the control device first sends a blow start signal to the blower AP immediately before starting water discharge (just before sending a valve opening signal to the electromagnetic valve). For this reason, supply of air from the blower AP to the second air flow path 20 is started, and air (air flow AFL3) flows from the inlet 32 toward the outlet 31 in the first air flow path 30. It becomes.

  Thereafter, at the timing when the air flow AFL3 becomes stable, the control device sends a valve opening signal to the electromagnetic valve and starts water discharge from the water outlet 53. As a result, the water discharged from the water outlet 53 flows in the same direction as the air while penetrating the air flow from the inlet 32 toward the outlet 31. In the period from the water outlet 53 to the outlet 31, the water is accelerated by the flow of air surrounding it, and the flow velocity increases. Further, due to the influence of the air flow surrounding the water, the water flows while being scattered in various directions perpendicular to the water discharge direction (expanding as the range where the water can reach reaches downstream). That is, since a large flow rate of water can be applied over a wide range to the user's hand, a high cleaning effect can be obtained.

  The water discharger 52 has a flat part 54 at the lower end thereof. The flat portion 54 is formed so that the normal direction thereof is oblique with respect to the central axis direction of the main flow path 36 (the water discharge direction from the water discharge portion 52). As described above, the water discharge portion 52 is a downstream end portion of the internal water channel IW, and the central axis thereof is a portion that coincides with the central axis of the main flow path 36. It can also be referred to as a surface formed by obliquely cutting the tip of 52. As a result, the water discharge port 53, which is an opening formed in the flat surface portion 54, is formed such that a plane including the inner edge thereof is inclined with respect to the water discharge direction of the water discharge portion 52.

  By adopting such a configuration, the water discharged from the water discharge portion 52 is in a state where only one side thereof is in contact with air when passing through the water discharge port 53, and immediately after that, the entire state is in contact with air. The water is discharged. As a result, the discharged water flows in a state in which surrounding air is involved and a lot of bubbles are included when passing through the water discharge port 53. The flow of water containing a large amount of air bubbles provides a high cleaning effect even if the flow rate of the water itself is small, and gives the user a comfortable cleaning feeling by giving an appropriate stimulus to the user's hand. be able to.

  Next, the hand dryer 1a which is 2nd embodiment of this invention is demonstrated. The hand drying device 1a is different from the hand drying device 1 only in the shape of the water discharge portion 52a formed at the downstream end of the internal water channel IW, and the other configuration is the same as the hand drying device 1.

  The configuration of the water discharger 52a of the hand dryer 1a will be described with reference to FIG. FIG. 6 is an enlarged cross-sectional view of the water discharger 52a in the hand dryer 1a. The water discharge portion 52a is a bent portion that is formed by bending the internal water channel IW upward in the upper portion of the funnel portion 33 in a direction substantially parallel to the axial direction of the second air flow path 20, and then bending downward. 70. The bent portion 70 is formed so that its central axis coincides with the central axis of the main flow path 36.

  A fixed cylinder 60 formed in a cylindrical shape is attached to the end face at the tip of the bent portion 70. The fixed cylinder 60 is arranged such that its central axis coincides with the central axis of the bent portion 70. An upper end portion is fixed to the bent portion 70.

  A first movable cylinder 61 is disposed inside the fixed cylinder 60. The first movable cylinder 61 is formed in a cylindrical shape, and is arranged so that its central axis coincides with the central axis of the fixed cylinder 60. The outer peripheral surface of the first movable cylinder 61 is in contact with the inner peripheral surface of the fixed cylinder 60, and it can slide along the central axis direction with respect to the fixed cylinder 60 and move within a predetermined range. Yes. Since the stopper is formed on the outer peripheral surface of the first movable cylinder 61, the first movable cylinder 61 is prevented from falling off the fixed cylinder 60.

  A second movable cylinder 62 is arranged inside the first movable cylinder 61. The second movable cylinder 62 is formed in a cylindrical shape, and is arranged so that its central axis coincides with the central axis of the first movable cylinder 61. The outer peripheral surface of the second movable cylinder 62 is in contact with the inner peripheral surface of the first movable cylinder 61, slides along the central axis direction with respect to the first movable cylinder 61, and moves relative to a predetermined range. Is possible. Since the stopper is formed on the outer peripheral surface of the second movable cylinder 62, the second movable cylinder 62 is prevented from falling off the first movable cylinder 61.

  A third movable cylinder 63 is arranged inside the second movable cylinder 62. The third movable cylinder 63 is formed in a cylindrical shape, and is arranged so that the central axis thereof coincides with the central axis of the second movable cylinder 62. The outer peripheral surface of the third movable cylinder 63 is in contact with the inner peripheral surface of the second movable cylinder 62, slides along the central axis direction with respect to the second movable cylinder 62, and moves relative to a predetermined range. Is possible. Since a stopper is formed on the outer peripheral surface of the third movable cylinder 63, the third movable cylinder 63 is prevented from falling off the second movable cylinder 62.

  The third movable cylinder 63 has a flat surface portion 65 at its lower end. The flat portion 65 is formed so that the normal direction thereof is oblique with respect to the central axis direction of the main channel 36 (the direction of water discharge from the water discharge portion 52a). In the flat surface portion 65, a water discharge port 66 is formed as an opening which is an outlet for water from the internal water channel IW.

  With the above-described configuration, the fixed cylinder 60, the first movable cylinder 61, the second movable cylinder 62, and the third movable cylinder 63 that constitute the water discharger 52a have the position of the water discharge port 66 of the first air flow path 30. The movable mechanism which can be changed along the central axis direction is configured. The movable mechanism has a drive device (not shown) controlled by a control device. By this driving device, the position of the first movable cylinder 61 with respect to the fixed cylinder 60, the position of the second movable cylinder 62 with respect to the first movable cylinder 61, and the position of the third movable cylinder 63 with respect to the second movable cylinder 62 are individually changed. As a result of being driven in this manner, the position of the water discharge port 66 can be set to a predetermined position.

  In the hand dryer 1a of the present embodiment, the flow until the water discharged from the water outlet 66 reaches the user's hand by changing the position of the water outlet 66 by the movable mechanism (with respect to the water discharge direction). Change how the water scatters in various vertical directions. Below, the relationship between the position of the spout 66 and the flow of water is demonstrated.

  FIG. 6 shows a case where the position of the water discharge port 66 is located at the uppermost end in the movable range. That is, the first movable cylinder 61, the second movable cylinder 62, and the third movable cylinder 63 are all located at the uppermost end in the respective movable ranges. In the present embodiment, when the water is not discharged from the water outlet 66 and only the air is blown to the user's hand to dry the user's hand, the water outlet 66 is controlled to be in the position shown in FIG. Is done. Since the position of the water discharge port 66 becomes the upper end of the movable range, it is suppressed that the movable mechanism such as the third movable cylinder 63 hinders the flow of air flowing from the inlet 32 toward the main flow path 36. The For this reason, a large flow rate of air can be blown out from the outlet 31.

  FIG. 7 shows a state in which water is discharged from the water discharge port 66 while only air is supplied from the blower AP after the third movable cylinder 63 is moved downward from the state of FIG. In FIG. 7, the position of the water discharge port 66 is in the vicinity of the lower end of the funnel portion 33 and above the opening portion 40 (upstream side).

  At this time, as shown in FIG. 7, the water WT discharged from the water discharge port 66 flows in a mist form while spreading greatly. This is because, at the position of the water discharge port 66 in FIG. 7, the flow of air flowing into the inflow port 32 from the outside has many velocity components perpendicular to the water discharge direction, and the discharged water WT is like this. This seems to be due to the influence of the air flow.

  FIG. 8 shows a state in which water is discharged from the water outlet 66 while air is supplied from the blower AP after the second movable cylinder 62 is further moved downward from the state of FIG. In FIG. 8, the position of the water discharge port 66 is in the vicinity of the curved portion 35 and below (downstream side) from the opening 40.

  At this time, as shown in FIG. 8, the water WT discharged from the water discharge port 66 spreads smaller than in FIG. 7, and becomes granular (a state where water droplets are smaller than the mist-like flow shown in FIG. 7). Flowing. This is because, even at the position of the water discharge port 66 in FIG. 8, the flow of air flowing from the outside into the inflow port 32 has a velocity component perpendicular to the water discharge direction. It seems that it is because it is getting smaller as it goes down.

  FIG. 9 shows a state where the first movable cylinder 61 is further moved downward from the state of FIG. 8 and then water is discharged from the water outlet 66 while air is supplied from the blower AP. In FIG. 9, the position of the water discharge port 66 is the lowermost end of the movable range, and is lower (downstream side) than the curved portion 35.

  At this time, as shown in FIG. 9, the water WT discharged from the water discharge port 66 flows in a straight shape without almost spreading. This is because, at the position of the water discharge port 66 in FIG. 9, the flow of air that has flowed into the inflow port 32 from the outside is substantially the flow along the axial direction of the first air flow path 30. This is probably because it has almost no vertical velocity component. For this reason, the water WT discharged from the water discharge port 66 flows while being accelerated only in the water discharge direction.

  As described above, in the hand drying device 1a according to the present embodiment, the position of the water discharge port 66 is changed in the direction of the central axis of the first air flow path 30 by the movable mechanism, thereby meeting the demand of the user who performs hand washing. Thus, it is possible to change the mode of water discharge.

  The embodiments of the present invention have been described above with reference to specific examples. However, the present invention is not limited to these specific examples. In other words, those specific examples that have been appropriately modified by those skilled in the art are also included in the scope of the present invention as long as they have the characteristics of the present invention. For example, the elements included in each of the specific examples described above and their arrangement, materials, conditions, shapes, sizes, and the like are not limited to those illustrated, but can be changed as appropriate. Moreover, each element with which each embodiment mentioned above is provided can be combined as long as technically possible, and the combination of these is also included in the scope of the present invention as long as it includes the features of the present invention.

DESCRIPTION OF SYMBOLS 1, 1a: Hand dryer 10: Main-body part 11: Female screw part 12: Male screw part 20: Second air flow path 30: First air flow path 31: Air outlet 32: Inlet 33: Funnel part 35: Curve Portion 36: Main flow path 40: Opening portion 52, 52a: Water discharge portion 53: Water discharge port 54: Planar portion 60: Fixed tube 61: First movable tube 62: Second movable tube 63: Third movable tube 65: Plane portion 66 : Water outlet 70: Bending part AFL0, AFL1, AFL2, AFL3: Air flow AP: Blower AS: Air supply part ASP: Air pipe F: Water faucet FH: Water outlet FU: Channel wall unit IW: Internal water channel L: Wash surface Table LB: Washing bowl LC: Counter WP: Water supply piping WT: Water

Claims (7)

In the hand dryer that is installed in the wash basin and blows air to the user's hand to dry it.
A flow path having both ends open to the outside so that air passes through, an inflow port that is an air inlet formed on one end side, and an air outlet that is an air outlet formed on the other end side; A first air flow path having a flow path wall defining a space through which air passes from the inlet to the outlet;
The flow path wall has a slit-like opening formed along a direction perpendicular to the direction from the inflow port to the blowout port, and extends from the opening to the inside of the first air flow path. An ejection part that ejects air toward the
A blower for generating a flow of air ejected from the ejection part;
A second air flow path connecting the blower and the ejection part,
On the downstream side of the ejection portion in the first air flow path, a curved portion is formed in which the inner surface of the flow path wall is curved,
The curved portion is formed so that at least a part of the air ejected from the ejection portion flows along the curved portion and then travels toward the outlet along the flow path wall. Hand dryer.   The said 1st air flow path is formed so that a flow-path cross-sectional area may become large, so that it is a position near the said blower outlet in the downstream from the said ejection part. Hand drying equipment.   The hand-drying device according to claim 1, further comprising a water discharger that discharges water so that water passes through the first air flow path from the inflow port toward the blowout port. .   The hand dryer according to claim 3, wherein water is discharged from the water discharge portion while air is being discharged from the discharge portion.   5. The hand dryer according to claim 3, wherein the water discharger discharges water toward a center in a cross section of the first air flow path.   The water discharge portion has a water discharge port opened as an outlet of water, and a plane including an inner edge of the water discharge port is formed so as to be inclined with respect to the water discharge direction of the water discharge portion. The hand dryer according to any one of claims 3 to 5.   The hand according to any one of claims 3 to 6, wherein the water discharge portion includes a movable mechanism that changes a position of the water discharge port in a central axis direction of the first air flow path. Drying equipment.

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