JP2019089385A - Air blowout device - Google Patents

Abstract

To make both compatible in miniaturization of an air blowout device and an air flow of high uniformity, while sufficiently reducing complication of a structure and an increase in a pressure loss, in the air blowout device for blowing out a curtain-like air flow from an opening formed in a cylindrical body by blowing in air to the inside of the cylindrical body.SOLUTION: An air blowout device comprises a body part including a first cylindrical body, an introduction part including a second cylindrical body and a discharge part including a third cylindrical body, and a first opening part is formed in a part of the body part, and a second opening part having the longitudinal direction parallel to the axis of the first cylindrical body is formed on a side surface of the body part, respectively, and the second cylindrical body is connected to the first cylindrical body via the first opening part, and the third cylindrical body is connected to the first cylindrical body via the second opening part so that respective inside spaces communicate. A plane orthogonal to the axis of at least the first cylindrical body projects from an inner wall of the first cylindrical body to an area uncrossed with the first opening part, and further has a spiral fin having a spiral shaft parallel to the axis of the first cylindrical body. A fin-unformed area exists on a projection drawing to the plane orthogonal to the axis of the first cylindrical body.SELECTED DRAWING: Figure 6

Description

  BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to an air blowing device for blowing out air blown into a cylinder in a curtain shape.

  In the relevant technical field, for example, a curtain-like air flow such as a defroster for the purpose of preventing or removing condensation on a windshield of an automobile and an air curtain for preventing intrusion of external air or dust into the interior of a building. An air blowing device for blowing out (air flow) is widely used.

  One specific example of such an air blowing device is, for example, an elongated outlet (air outlet) extending along the windshield and a nozzle (air channel) for sending air toward the outlet. There may be mentioned a equipped defroster. For the defroster, it is required to blow out an air flow as uniform as possible (for example, less variation in flow velocity and flow rate) at a sufficient flow velocity and flow rate toward the windshield having a large area. Therefore, the defroster according to the prior art includes a nozzle having a shape in which the cross-sectional area of the flow path gradually increases as it approaches the outlet (for example, see Patent Document 1). ). Thus, it is considered that the air passing through the nozzle is gradually dispersed and diffused, and the air is uniformly blown out from the entire blowout port.

  On the other hand, with the recent advancement of automobiles in recent years, such as the installation of a head-up display device, there is a tendency to increase the number of devices disposed in the dashboard, and as a result, the area where the defroster can occupy in the dashboard Tends to narrow. Therefore, as described above, the defroster is required to be as compact as possible while maintaining the function of blowing out a uniform air flow at a sufficient flow velocity and flow rate. For example, in other applications that use an air blowing device, such as an air curtain, it is desirable to miniaturize the air blowing device while maintaining the desired performance from the viewpoint of the freedom of design etc. There is also no.

  In response to the request as described above, in this technical field, a part of the cylindrical casing (cylindrical body) having an elongated slit-like opening (for example, an end or a central part in the longitudinal direction, etc.) An air blowing apparatus has been developed which blows air into the interior of the and blows out a curtain-like air flow from the opening. According to this, since the nozzle having the above-described fan-like shape is not required, the air blowing device can be miniaturized. However, since air is blown into the interior from a part of the cylinder, a deviation tends to occur in the flow velocity and / or flow rate of the air flow blown out from the opening as the air flow outlet. In particular, with regard to the defroster, the position at which air is blown into the cylinder is often limited due to the arrangement of various devices in the dashboard, and the degree of freedom in design is low, thus reducing the above problems. It is important to.

  Therefore, in the air curtain air-jetting device provided with slits in the longitudinal direction of the cylindrical sealed container, a cylindrical filter is disposed in the cylindrical sealed container and a helical ribbon structure is used as a rectifier in the cylindrical filter. It is proposed to provide (see, for example, Patent Document 2). According to this, it is possible to achieve both the downsizing of the air blowing device and the highly uniform air flow. However, the structure in which the cylindrical filter and the rectifier are disposed in the cylindrical closed container is complicated, and a high pressure loss due to the filter is concerned.

  Further, in the air blowing device for blowing out the air introduced from the air inlet into the air flow passage from the air outlet, the spiral flow passage is provided in the air flow passage by the spiral ribbon structure extending in the direction away from the air inlet. It has been proposed to configure the opening and the discharge path so that the swirling flow of air flowing along the outer peripheral surface of the spiral flow channel flows to the air outlet while maintaining the flow direction (see, for example, Patent Document 3) ). According to this, while the increase in pressure loss is also reduced to a certain extent by the relatively simple structure, it is possible to achieve both the downsizing of the air blowing device and the highly uniform air flow. However, while there is still some pressure loss due to the helical flow path, there is a natural limit to the blowing capacity of the blower that supplies air to the air blowing device, and the uniformity of the air flow blown out from the air outlet There is a need for further improvements in the reduction of stiffness and pressure loss.

Unexamined-Japanese-Patent No. 2010-188791 Unexamined-Japanese-Patent No. 2010-019483 International Publication No. 2014/184958

  As noted above, there is a need in the art for further improvements in air flow uniformity and reduced pressure loss blown out of the air outlet of an air blowing device used for applications such as, for example, defrosters and air curtains. ing. More specifically, in an air blowing apparatus that blows air from a part of the cylinder into the inside of the cylinder and blows out a curtain-like air flow from the opening formed in the cylinder, the structure becomes complicated and the pressure loss increases. There is a need for a technology that can achieve both downsizing of the air blowing device and highly uniform air flow while sufficiently reducing the pressure.

  In view of the above problems, as a result of earnest research, the inventor of the present invention blows air from a part of a cylinder into the interior of the cylinder and blows a curtain-like air flow from an opening formed in the cylinder. By removing the region near the helical axis of the member forming the helical air flow passage inside the body to form a space extending in the helical axial direction, the structure is sufficiently complicated and the pressure loss is sufficiently increased. It has been found that it is possible to achieve both downsizing of the air blowing device and a highly uniform air flow while reducing it.

  That is, an air blowing device according to the present invention (hereinafter, may be referred to as “the present invention device”) includes a main body including a first cylinder, an introducing unit including a second cylinder, and It comprises a discharge part including three barrels. A first opening is formed in part of the main body. A second opening having a longitudinal direction parallel to the axis of the first cylinder is formed on the side surface of the main body. The main body portion and the introduction portion are connected such that the internal space of the first cylindrical body and the internal space of the second cylindrical body communicate with each other through the first opening. The main body portion and the discharge portion are connected such that the internal space of the first cylindrical body and the internal space of the third cylindrical body communicate with each other through the second opening.

  In addition, the device according to the present invention further includes a fin formed in at least a part of a distribution area which is a partial area of the inner space of the first cylinder. The distribution area is a partial area of the internal space of the first cylinder in which a plane perpendicular to the axis of the first cylinder does not intersect the first opening. The fin has a single spiral or multiple spiral shape having a helical axis that protrudes from the inner wall of the first cylinder and is parallel to the axis of the first cylinder. Furthermore, in the projection on a plane perpendicular to the axis of the first cylinder, the fin is configured such that there is a through region which is a region in which the fin is not formed.

  According to the device of the present invention, the air blowing device blows air from a part of the cylinder into the interior of the cylinder and blows out a curtain-like air flow from the opening formed in the cylinder, resulting in complicated structure and increased pressure loss. Can be made compatible with the downsizing of the air blowing device and the highly uniform air flow.

  Other objects, other features and attendant advantages of the present invention will be readily understood from the description of embodiments and examples of the present invention described with reference to the following drawings.

A main body including a first cylinder constituting an air blowing device (a first device) according to a first embodiment of the present invention, an introducing unit including a second cylinder, and a discharge including a third cylinder It is a typical perspective view showing a part. It is a schematic plan view which illustrates the various modifications of the 1st opening formed in a main-body part. It is a typical perspective view which illustrates the appearance of the 1st device. It is a typical perspective view showing an example of the fin with which the 1st device is provided. It is a schematic plan view which shows the introductory area | region and distribution area | region in the 1st cylinder which comprises the main-body part of 1st apparatus. It is a typical see-through perspective view explaining the twist direction of the fin in the 1st cylinder. It is a schematic diagram which shows a mode that air swirls along the shape of a fin in a 1st cylinder. It is a schematic perspective view which illustrates the external appearance of the air blowing apparatus (4th apparatus) which concerns on 4th Embodiment of this invention. It is a schematic cross section which shows the structure of the periphery of the introductory area | region in the air blowing apparatus (5th apparatus) which concerns on 5th Embodiment of this invention. It is a typical sectional view showing the structure around a lead-in area in one example of the 5th device. It is a typical sectional view showing the structure of the circumference of the introductory field in another example of the 5th device. It is a schematic diagram which shows the example of the 2nd opening part formed in the main-body part with which the air blowing apparatus (6th apparatus) which concerns on 6th Embodiment of this invention is provided. It is a schematic diagram which shows the specific example of a structure of the main-body part with which the air blowing apparatus (7th apparatus) which concerns on 7th Embodiment of this invention is provided. It is a schematic diagram which shows the specific example of a structure of the main-body part with which the air blowing apparatus (8th apparatus) which concerns on 8th Embodiment of this invention is provided. It is a typical see-through | perspective perspective view which shows the structure of one specific example (Example apparatus 101) of the air blowing apparatus based on the Example of this invention. It is a schematic diagram which shows the structure of the fin with which the Example apparatus 101 is provided. It is a schematic diagram which shows the structure of the Example apparatus 101 shown in FIG. FIG. 16 is a schematic cross-sectional view showing the structure around the introduction region in the example device 101 shown in FIG. 15. It is a typical see-through | perspective perspective view which shows the structure of another specific example (Example apparatus 102) of the air blowing apparatus based on the Example of this invention. It is a schematic diagram which shows the structure of the fin with which the Example apparatus 102 is provided. It is a schematic diagram which shows the structure of the Example apparatus 102 shown in FIG. FIG. 20 is a schematic cross-sectional view showing the structure around the introduction region in the embodiment apparatus 102 shown in FIG. 19; It is a table | surface which shows the result of a computational fluid dynamics (CFD) analysis about the air blowing apparatus (this invention apparatus) which concerns on this invention, and the air blowing apparatus (conventional apparatus) which concerns on a prior art.

First Embodiment
Hereinafter, an air blowing device (hereinafter, may be referred to as “first device”) according to the first embodiment of the present invention will be described. FIG. 1 is a schematic perspective view showing a main body including a first cylinder constituting the first device, an introducing unit including a second cylinder, and a discharge unit including a third cylinder. In FIG. 1, in order to make it easy to understand the configuration of the first device, the internal structure of the main body, the introducing part, and the discharging part is shown by a broken line, and fins described later are omitted. Further, the dimensions, aspect ratios, and the like of the respective parts in the drawings referred to in the following description do not necessarily indicate actual dimensions, aspect ratios, and the like, and are appropriately modified for the purpose of assisting the understanding of the present invention. There is a case.

<Constitution>
For example, as shown in FIG. 1, the first device 100 includes a main body 110 including a first cylinder, an introduction unit 120 including a second cylinder, and a discharge unit 130 including a third cylinder. . The size and shape of the main body portion 110, the introducing portion 120, and the discharging portion 130 are cylindrical members in which a space having a sufficient cross-sectional area and length as a flow path (air flow path) through which air flows is formed It is not particularly limited as long as Specifically, these cylinders may be, for example, cylinders, oval cylinders, and square cylinders. However, as for the shape of the 1st cylinder which comprises a main-body part at least, it is desirable that it is cylindrical shape. In FIG. 1, the upper side is “U”, the lower side is “D”, the left side is “L”, the right side is “R”, and the back side (front side) is “F”, and the front side. (The back side) is each represented by "B".

  The axes of the cylinders constituting the main body portion 110, the introducing portion 120, and the discharging portion 130 do not necessarily have to be straight. For example, the shape of the space in which the first device 100 is disposed, the first device It bends according to the shape of the object (for example, the windshield of a vehicle etc.) which supplies the curtain-like air flow blown out from 100, and arrangement of related devices, such as a blower which introduces air into the 1st device 100, etc. May be

  A first opening 111 is formed in part of the main body 110. The first opening 111 is, for example, a through hole formed in a side surface, a top surface, or a bottom surface of a first cylindrical body that constitutes the main body portion 110. The size, shape, and position of the first opening 111 are such that air flows smoothly from the second cylinder constituting the introduction portion 120 to the first cylinder via the first opening 111. There is no particular limitation as far as possible. Typically, the first opening 111 is formed as a through hole having a size and a shape corresponding to the joint surface of the first cylinder and the second cylinder.

  On the side surface of the main body portion 110, a second opening 112 having a longitudinal direction parallel to the axis of the first cylindrical body constituting the main body portion 110 is formed. The second opening 112 is a through hole formed in the side wall of the first cylinder. The size and shape of the second opening 112 allow air to flow smoothly through the second opening 112 from the first cylinder to the third cylinder constituting the discharge part 120. It is not particularly limited as long as it is present. Typically, the second opening 112 is configured to have a size and shape corresponding to the joint surface of the first cylinder and the third cylinder.

  In addition, if the second opening 112 has an elongated shape having a longitudinal direction parallel to the axis of the first cylindrical body constituting the main body 110 as a whole, the inside and the outside of the first cylindrical body are formed. And a single through hole or a group of a plurality of through holes communicating with each other. Specifically, for example, as shown in FIG. 2A, the second opening 112 is a slit-like single having a longitudinal direction parallel to the axis of the first cylinder constituting the main body 110. May be constituted by the opening of. Alternatively, the second opening 112 is constituted by a plurality of discontinuous openings arranged along a direction parallel to the axis of the first cylinder, as shown in FIG. 2B, for example. It is also good. Alternatively, the second opening 112 is, for example, a single slit-like opening having a longitudinal direction parallel to the axis of the first cylinder, as shown in FIG. For the purpose of maintaining the mechanical strength of 110, etc., the opening may be constituted by one or more ribs 112r. FIG. 2 is a plan view of the main body 110 shown in FIG. 1 as viewed from the direction U (ie, the upper side) shown in the drawing.

  Furthermore, according to the application etc. of the 1st device 100, a further opening may be formed in the main part other than the 1st opening 111 mentioned above and the 2nd opening 112, for example. Specifically, as long as the flow velocity and flow rate of the air flow required for the first device 100 are satisfied, for example, one or more penetrations to the top surface and / or the bottom surface of the first cylinder constituting the main body 110 A hole may be formed.

  In addition, the main body portion 110 and the introduction portion 120 are connected such that the internal space of the first cylindrical body and the internal space of the second cylindrical body communicate with each other through the first opening 111. It is connected. The main body 110 and the lead-in portion 120 do not necessarily have to be airtightly connected in a strict sense, but generally it is desirable to be airtightly connected. Further, the main body portion 110 and the discharge portion 130 are connected such that the internal space of the first cylindrical body and the internal space of the third cylindrical body communicate with each other through the second opening 112. It is done. The main body 110 and the discharge part 130 do not necessarily have to be airtightly connected in a strict sense, but in general, it is desirable to be airtightly connected.

  FIG. 3 is a schematic perspective view illustrating the appearance of the first device 100 including the main body portion 110, the introducing portion 120, and the discharging portion 130 connected as described above. As described above, the first opening 111 may be formed, for example, on the side surface, the top surface, or the bottom surface of the first cylinder that constitutes the main body 110. For example, in the case where the first opening 111 is formed in the central portion of the side surface of the first cylinder, the end of the side surface, and one end surface (top surface or bottom surface), the first device 100 is shown in FIG. It has the appearance as shown in (a), (b) and (c) of

  In addition to the above, the first device 100 further includes fins formed in at least a part of a distribution area which is a partial area of the inner space of the first cylinder. The fin has a single spiral or multi-helix shape which protrudes from the inner wall of the first cylinder and has a helical axis parallel to the axis of the first cylinder. In other words, the fin alone has a shape such as a single coil or a multiple coil whose outer periphery is in contact with the inner wall of the first cylinder and has a helical axis parallel to the axis of the first cylinder.

  FIG. 4 is a schematic perspective view showing an example of a fin provided in the first device 100. As shown in FIG. The fin 115 shown in FIG. 4 has a smooth single spiral shape formed of a helically twisted elongated plate-like member. The fin 115 also has a helical axis HA which protrudes from the inner wall of the first cylinder constituting the main body 110 and is parallel to the axis of the first cylinder. However, the shape of the fin 115 shown in FIG. 4 is merely an example, and as long as the air passing through the inside of the first cylinder can be swirled along the shape of the fin, the shape of the fin 115 is It is not particularly limited.

  Generally, as the multiplicity of the helical structure constituting the fin increases, air passing through the inside of the first cylinder becomes easier to swirl along the shape of the fin (ie, the spiral swirl flow On the other hand, the pressure loss of the air passing through the inside of the first cylinder is increased. Thus, the multiplicity of fins (the number of helical structures combined) is, for example, a pressure drop for the function sought as an air blowing device (for example, the uniformity of the curtain-like air flow blown out of the air blowing device) It can set suitably, considering the influence etc. which increase of.

  Also, in general, as the protrusion amount (height) of the fin from the inner wall of the first cylinder increases, air passing through the inside of the first cylinder is more easily swirled along the shape of the fin. The pressure loss of the air passing through the inside of the first cylinder is increased. Therefore, the height of the fins can also be appropriately set, for example, in consideration of the influence of the increase in pressure loss on the function required as the air blowing device.

  Furthermore, in general, as the length (pitch) of the fin in the direction parallel to the helical axis of one rotation around the helical axis of the fin decreases, the air passing through the inside of the first cylinder takes on the shape of the fin While it is easy to turn along, the pressure loss of the air passing through the inside of the first cylinder is increased. Therefore, the pitch of the fins can also be appropriately set, for example, in consideration of the influence of the increase in pressure loss on the function required as the air blowing device.

  In addition, the height and / or pitch of the fins may not necessarily be constant over the entire length of the distribution area. For example, the shape of the space in which the first device is disposed, the shape of an object (for example, the windshield of a vehicle, etc.) that supplies the curtain-like air flow blown out from the first device, and the air to the first device The height and / or pitch of the fins may be changed according to the arrangement of related devices such as a blower to be introduced. In this case, the change in height and / or pitch of the fins may be continuous or stepwise.

  Typically, the fin is configured such that the helical axis of the fin and the axis of the first cylinder coincide. In other words, the fin and the first cylinder are coaxially configured. Thus, the air introduced from the introduction portion to the main body through the first opening can form the swirling flow more smoothly.

  The distribution area is a partial area of the internal space of the first cylinder in which a plane perpendicular to the axis of the first cylinder does not intersect the first opening. In other words, the distribution area is the first area other than the “introduction area which is a partial area of the internal space of the first cylinder where the plane orthogonal to the axis of the first cylinder intersects the first opening”. Part of the internal space of the cylinder of Furthermore, in other words, the distribution area is an area surrounded by a cylindrical portion excluding the portion to which the introduction portion is connected in the first cylindrical body constituting the main body portion.

  For example, in the case of the main body portion 110 shown in (a) of FIG. 2 and (a) of FIG. 3, the “introduction region” is a first cylindrical body corresponding to a portion shown by oblique lines in The "distribution area" is the partial area 114 (114L and 114R) of the internal space of the first cylindrical body corresponding to the portion indicated by the hatching in FIG. 5B. In the case of the main body 110 provided in the first device 100 shown in (b) of FIG. 3, a partial region of the internal space of the first cylindrical body corresponding to the end of the right side (R side) of the main body 110 Is the introduction area, and a partial area of the internal space of the first cylinder other than the introduction area is the distribution area (not shown). On the other hand, in the case of the main body 110 provided in the first device 100 shown in (c) of FIG. 3, there is no partial region corresponding to the introduction region in the internal space of the first cylinder, and the first cylinder All areas of the body's inner space are distribution areas (not shown).

  As shown in FIG. 5, when the first opening 111 is formed in a portion other than the end of the side surface of the first cylinder constituting the main body 110, the introduction region 113 is formed in the middle of the main body 110. Is located. Therefore, the area between the introduction area 113 and one end of the main body 110 and the two areas between the introduction area and the other end of the main body become the distribution areas 114L and 114R. In this case, the twisting directions of the helical shape of the fins formed in each of the two distribution areas 114L and 114R are opposite to each other.

  For example, (a) of FIG. 6 is a schematic see-through perspective view of the first device 100 having the configuration as described above, and (b) is a schematic see-through perspective view separately drawing only fins. In the example shown in FIG. 6, the twisting direction of the fins 115L formed in the distribution area 114L on the left side (L side) in the drawing is the left screw direction with respect to the flow of air (open arrow). The twisting direction of the fins 115R formed in the distribution area 114R on the right side (R side) toward the right is a right screw direction with respect to the flow of air (solid arrows).

  As described above, in the example shown in FIG. 6, the twisting directions of the helical shapes of the fins formed in each of the two distribution regions 114L and 114R are opposite to each other. However, the air flow directions in the distribution area 114L and the distribution area 114R are opposite (see the arrow in (b) of FIG. 6). As a result, as shown in FIG. 7, the air passing through the two distribution areas 114L and 114R is generated by the swirling along the shape of the fins in a projection on a plane perpendicular to the axis of the first cylinder. The direction of the swirling flow is the same.

  On the other hand, for example, as shown in (b) of FIG. 3, when the first opening 111 is formed at the end of the side surface of the first cylinder constituting the main body 110, Since the introduction area 113 is located at the end, the area between the end opposite to the introduction area 113 of the first cylindrical body and the introduction area 113 is one distribution area 114. When the first opening 111 is formed on the top and / or bottom of the first cylinder as shown in FIG. 3C, it is perpendicular to the axis of the first cylinder. Since the plane and the first opening 111 do not intersect, the introduction region 113 does not exist, and the entire inner space of the first cylinder becomes the distribution region 114.

  In addition, in the projection on a plane perpendicular to the axis of the first cylindrical body, the fin is configured such that a through region which is a region in which the fin is not formed is present. In other words, in the distribution area of the main body of the first device 100, in addition to the area (swing area) which is the area in which the fins are formed, it has a longitudinal direction parallel to the axis of the first cylinder. A penetrating area consisting of a continuous space is formed. That is, the distribution area of the main body portion included in the first device has a structure in which a part of the fin is cut (cut out) in a portion corresponding to the penetration area. In FIG. 7 described above, the shaded area 116 corresponds to the penetration area.

  The first device having the above-described configuration can be manufactured by using materials and methods known to those skilled in the art. For example, the first device may be integrally manufactured by an injection molding method in which a resin such as a thermoplastic resin is injected into a mold corresponding to the shape of the first device. Alternatively, the first cylinder, the second cylinder, and the third cylinder having the structure as described above may be separately manufactured and joined by a known method. Alternatively, the first cylinder, the second cylinder, and / or the third cylinder may be divided into a plurality of portions and injection molded separately, and those portions may be joined. The fin disposed inside the first cylinder is also molded as a separate member from the first cylinder or a part constituting the first cylinder, and the first cylinder or the first cylinder It may be joined at a predetermined position on the inner wall of the part that constitutes the body. Alternatively, the fin and the first cylinder may be integrally formed.

  In addition, in order to prevent the so-called "undercut" in the case of integrally molding the first cylinder or the portion constituting the first cylinder and the fin, a plurality of (platelet-free) flat plate shapes The fin having a substantially spiral shape may be configured by a combination of the members of the above. According to this, by configuring the mold so that the mold release direction matches the in-plane direction of the flat plate-shaped member that constitutes the fin, it is necessary to divide the mold to avoid the undercut. The fins can be formed without.

  Furthermore, the main body, the introduction part, and the discharge part that constitute the first device are connected to each other, such as a flange and a stay, in addition to the cylindrical members that constitute each, to constitute the first device or the first device It may have a fixing structure for fixing to other articles (for example, a blower and a dashboard).

<effect>
In the first device having the above-described configuration, a portion of the air introduced from the introduction portion to the main body through the first opening flows along the shape of the fins to form a swirling flow. The air flows from the main body to the discharge unit through the second opening, and is blown out as a curtain-like air flow from an air outlet which is an opening opposite to the second opening of the discharge unit. On the other hand, the remaining part of the air introduced into the main body through the first opening can easily reach the end of the main body through the penetration region. In addition, it is considered that part of the air forming the swirl flow may flow into the penetration area, or part of the air flowing through the penetration area may contact the fins or the like to form the swirl flow. Be

  As a result of the above, in the first device, the air is distributed to the second opening in a more uniform state (for example, a state in which the variation in the flow velocity and the flow rate of the air in the longitudinal direction of the second opening is small) It can be (distributed and diffused). The air so distributed is then blown out of the air outlet via the second opening and the outlet. That is, according to the first device, it is possible to blow out a curtain-like air flow with high uniformity.

  In the first device, as described above, part of the air introduced into the main body can easily reach the end of the main body through the penetration region. This makes it difficult for the air passing through the inside of the main body to flow along the shape of the fins and to form the swirling flow, so that it is difficult to reach the end of the main body and the air outlet It is also possible to prevent the flow velocity and flow rate of the air blown out from the end from being reduced.

  That is, according to the first device, the air blowing device blows out air from a part of the cylinder into the inside of the cylinder and blows out a curtain-like air flow from the opening formed in the cylinder. Can be made compatible with the downsizing of the air blowing device and the highly uniform air flow.

Second Embodiment
Hereinafter, an air blowing device according to a second embodiment of the present invention (hereinafter, may be referred to as a “second device”) will be described.

  Direction in which the flow path (discharge path) of air defined by the third cylinder constituting the discharge portion provided in the air blowing device (the present invention device) according to the present invention including the first device described above extends Is the change in the flow direction of the air after passing through the second opening with respect to the flow direction of the air before passing through the second opening (ie, passing through the second opening Change in the direction of air flow before and after

  For example, when the discharge path extends in the direction opposite to the flow direction of the air introduced by the introduction portion from the introduction portion to the main body portion through the first opening and swirled by the fin, the second opening Before and after passing through, the air flow direction changes in the opposite direction. In this case, the degree of change in the air flow direction before and after passing through the second opening is large.

  As described above, when the degree of change in the flow direction of the air before and after passing through the second opening is large, energy (for example, kinetic energy) caused by the flow of air (swirl flow) swirled by the fin is It is difficult to use it efficiently for In other words, it is difficult to efficiently extract the swirling flow flowing along the inner side surface of the first cylinder in the main body from the second opening, and energy loss when passing through the second opening Is large. The greater the loss of energy, the greater the pressure loss that occurs when passing through the second opening.

  Conversely, when the degree of change in the air flow direction before and after passing through the second opening is small, it is easy to efficiently use the energy resulting from the swirling flow for blowing air. In other words, it is easy to efficiently extract the swirling flow flowing along the inner side surface of the first cylinder in the main body from the second opening, and energy loss when passing through the second opening Is small. The smaller the loss of energy, the smaller the pressure loss that occurs when passing through the second opening.

<Constitution>
Therefore, in the second device, in the first device described above, the discharge is introduced along the direction in which the air introduced into the main body from the introduction part through the first opening and swirled by the fin flows It is an air blowing apparatus in which the said discharge part is connected with the said main-body part so that the internal space of a part may extend from the said 2nd opening part.

  The discharge unit is configured to flow (convey) air, which has flowed out of the main body through the second opening, to the air outlet (which is an opening opposite to the second opening of the discharge unit). And define an internal space as an air flow path connecting the second opening and the air outlet. This internal space is introduced into the main body 110 from the introducing part 120 (not shown) through the first opening 111 (not shown) as shown by, for example, a solid arrow in FIG. It is configured to extend from the second opening 112 along the flow direction of the air swirled by 115. Typically, the internal space of the discharge portion 130 is configured to extend from the second opening 112 in a tangential direction of the side surface of the first cylinder constituting the main body portion 110.

<effect>
According to the above configuration, in the second device, at least a part of the air swirled by the fins can smoothly flow from the main body to the discharge part while passing through the second opening while maintaining the flow direction it can. As a result, the pressure loss of air passing through the second opening can be reduced. Therefore, according to the second device, the air blowing device blows air from a part of the cylinder into the inside of the cylinder and blows out a curtain-like air flow from the opening formed in the cylinder. Can be made compatible with the downsizing of the air blowing device and the highly uniform air flow while sufficiently reducing the increase of the air flow rate.

Third Embodiment
Hereinafter, an air blowing device according to a third embodiment of the present invention (hereinafter, may be referred to as a “third device”) will be described.

  Additional openings may be formed in the body other than the first and second openings as described above for the first device. However, in order to blow out the curtain-like air flow from the air outlet at a sufficient flow velocity and flow rate by utilizing all the blowing ability of the blower for supplying the air to the air blowing device, the first opening and It may be desirable for no further openings to be formed in the body other than the second opening.

<Constitution>
Therefore, the third device is the air blowing device, which is the first device or the second device described above, in which both ends of the main body in the axial direction of the first cylindrical body are closed. For example,

  As described above, in the third device, for example, as in the examples shown in (a) and (b) of FIG. 3, both ends in the axial direction of the first cylindrical body constituting the main body portion 110, that is, The face and the bottom are closed. Thereby, all of the air introduced into the main body 110 is introduced into the discharge part 130 through the second opening 112, and the opening on the opposite side of the second opening 112 of the discharge part 130 It is blown out from a certain air outlet 131 as a curtain-like air flow.

<effect>
According to the above configuration, in the third device, the curtain-like air flow can be blown out from the air outlet at a sufficient flow velocity and flow rate by utilizing all the blowing capacity of the blower for supplying air to the third device. .

Fourth Embodiment
Hereinafter, an air blowing device according to a fourth embodiment of the present invention (hereinafter, may be referred to as a "fourth device") will be described.

  As discussed above with respect to the first device, additional openings may be formed in the body portion other than the first and second openings, depending, for example, on the application of the air blowing device. For example, in the case where the air blowing device is used as a supply source of air to another air blowing device, a further opening other than the first opening and the second opening is formed in the main body. Sometimes it is desirable.

<Constitution>
Therefore, a fourth device is the first device or the second device described above, wherein a third opening is formed in at least one of both ends of the main body in the axial direction of the first cylindrical body. It is an air blowing device. Specifically, in the fourth device, for example, as shown in (a) to (c) of FIG. 8, at least one of both ends in the axial direction of the first cylinder constituting the main body portion 110 A third opening 117, which is a through hole communicating the internal space of the portion 110 with the outside, is formed.

  In the example shown in FIG. 8, a through hole having a circle (concentric circle) coaxial with the end face of the first cylindrical body at the center of the end face on the left side (L side) in the drawing of the first cylindrical body Is formed as the third opening 117. However, this is merely an example, and the position where the third opening 117 is formed and the shape and size of the third opening 117 do not excessively impair the function of the fourth device as the air blowing device. As long as it is not particularly limited.

<effect>
As described above, in the fourth device, the internal space of the main body portion is communicated with the outside in at least one of both ends in the axial direction of the first cylindrical body constituting the main body portion, that is, the top surface and / or the bottom surface. A third opening which is a through hole is formed. Thereby, a part of the air introduced into the main body can be discharged to the outside through the third opening.

  The air flow discharged to the outside as described above is, for example, supplied to another air blowing device and can be used for other purposes. As a specific example of such another purpose, for example, prevention or removal of condensation on the front door glass by another air blowing device such as a side defroster mounted on a vehicle can be mentioned.

  However, in light of the original function as an air blowing device that blows air into the interior of the cylinder from a part of the cylinder and blows out a curtain-like air flow from the opening formed in the cylinder, the curtain blown out from the air outlet Preferably, the flow rate of the air flow is greater than the flow rate of the air flow blown out through the third opening.

Fifth Embodiment
Hereinafter, an air blowing device according to a fifth embodiment of the present invention (hereinafter, may be referred to as a “fifth device”) will be described.

  By the way, as described above, in the device of the present invention including the first device to the fourth device, the side surface of the first cylinder has a second longitudinal direction parallel to the axis of the first cylinder. The opening of is formed. In addition, for example, in the case where the first opening is formed on the side surface of the first cylinder constituting the main body, the plane orthogonal to the axis of the first cylinder intersects the first opening. The "introduction region" which is a partial region of the internal space of the first cylinder that On the other hand, a fin having a single-helix or multi-helix shape which has a spiral axis which protrudes from the inner wall of the first cylinder and has a helical axis parallel to the axis of the first cylinder is orthogonal to the axis of the first cylinder. The flat surface is formed in at least a part of a partial region (distribution region) of the internal space of the first cylinder which does not intersect the first opening.

  Therefore, in the introduction region, the fins may not be formed, and the second opening may be formed. In this case, at least a portion of the air that has flowed into the introduction region of the main body from the introduction portion through the first opening does not touch the fins, that is, without any special pressure loss. It can flow out of the opening into the outlet. As a result, the flow rate of air flowing from the introduction area to the distribution area is relatively reduced, and the flow rate of air flowing out from the second opening near the distribution area to the discharge part is the second flow rate near the introduction area. The flow rate of the air flowing out from the opening to the discharge part is smaller than the flow rate of the air, and the uniformity of the curtain-like air flow blown out from the air outlet may be deteriorated.

<Constitution>
Thus, the fifth device is an air blowing device according to any one of the first to fourth devices described above, wherein a plane orthogonal to the axis of the first cylinder intersects the first opening. In the introduction area which is a partial area of the inner space of the first cylinder, the flow rate of air from the first opening toward the second opening is reduced to increase the flow rate of air toward the distribution area The air blowing apparatus is provided with the suppression structure which is the structure comprised by these.

  As said "introduction area | region", the area | region 113 shown by the oblique line in FIG. 9 can be mentioned, for example. By providing the suppression structure in the introduction area 113, the flow rate of the air directed to the second opening 112 is reduced without contacting the fins to form a swirl flow, and the distribution area 114 (the internal space of the first cylinder The flow rate of the air toward the area (other than the introduction area 113) can be increased. FIG. 9 is a schematic cross-sectional view showing the structure around the introduction region 113 of the fifth apparatus. In the example shown in FIG. 9, the spiral axis HA of the double spiral fin 115 (115L and 115R) coincides with the axis of the first cylinder. Therefore, in the following description, the axis of the first cylinder is also referred to as "HA".

  (A) of FIG. 9 is a schematic view of the introducing portion 120 when observed from the air inlet 121 side, and (b) configures the axis HA of the first cylindrical body constituting the main body portion 110 and the introducing portion 120. It is the schematic of the periphery of the introductory area | region 113 when the cross section by the plane containing the axis | shaft AX of a 2nd cylinder is observed from an upper side (U side). FIG. 9C is a cross-sectional view of the periphery of the introduction region 113 by a plane perpendicular to the axis HA of the first cylinder and including the axis AX of the second cylinder, and FIG. 3A and 3B are cross-sectional views of the main body portion 110 and the discharge portion 130 in a plane orthogonal to the axis HA of the cylindrical body and including the line X shown in (b).

  The specific configuration of the suppression structure can reduce the flow rate of air from the first opening 111 to the second opening 112 in the introduction area 113 and increase the flow rate of air to the distribution area (114). As long as it is, it does not specifically limit. In particular, the restraining structure may be configured to increase the pressure loss of the air from the first opening towards the second opening. Also, the suppression structure may be configured to reduce the cross-sectional area of the flow path of air from the first opening to the second opening. Such a restraining structure can include, for example, members such as a shielding plate (baffle), a net, a pin, a fin, and a protrusion disposed in at least a part of the introduction region 113. Alternatively, the suppression structure can be configured by, for example, thickening the outer wall of the first cylinder in at least a part of the introduction region 113 to reduce the flow passage cross-sectional area.

  By the way, the suppression structure has a function of reducing the flow rate of air from the first opening 111 to the second opening 112 in the introduction area 113 and a function of increasing the flow rate of air toward the distribution area 114. Desired. From the viewpoint of sufficiently exerting these two functions, for example, the air that has flowed from the introducing unit 120 into the introducing region 113 of the main body 110 through the first opening 111 is directly transmitted to the second opening 112. It may be desirable to provide a guide plate in the introductory area that prevents it from flowing into the distribution area 114. That is, the restraint structure may include a guide plate for guiding the air flowing into the introduction area to the distribution area.

  For example, as shown in FIG. 10, curved guide plates 118 (118L and 118R) are introduced to allow air flowing into the introduction area from the air inlet 121 through the first opening to smoothly flow into the distribution area. It is considered desirable to provide in the area. In the example shown in FIG. 10, of the air that has flowed into the introduction area from the air inlet 121, the air that has flowed into the space between the two guide plates 118L and 118R does not form a swirling flow, and the second Head to the opening 112 of the On the other hand, the air flowing into the space on the left side (L side) and the right side (R side) of the two guide plates 118L and 118R is directed to the distribution areas on the left side (L side) and the right side (R side). . That is, according to the example shown in FIG. 10, the air flowing into the introduction region is smoothly guided into the distribution region, and the flow rate of the air directed to the second opening 112 is effective without forming a swirl flow. Can be reduced to

  However, depending on, for example, the design specifications of the fifth device, providing the suppression structure including the guide plates 118L and 118R as shown in FIG. 10 in the introduction region causes excessive pressure loss, and achieves the flow rate required for the blown air flow. Can lead to problems that are difficult to However, the inventor found that the above problem can be reduced by providing a simple flat plate in the introduction area that divides the air flowing into the introduction area into the left side (L side) and the right side (R side). The Therefore, the guide plate may be a flat member having a major surface intersecting with the axis of the first cylinder.

  For example, in the example shown in FIG. 11, a flat plate-like flow dividing plate 119 orthogonal to the axis of the first cylinder (the main body 110) (that is, the helical axis of the fin 115) HA is provided in the introduction region 113. . In the example shown in FIG. 11, the diverting plate 119 extends to the inside of the introduction portion 120 upstream of the introduction region 113 and the inside of the discharge portion 130 downstream of the introduction region 113, but The flow dividing plate 119 may be provided at least in the introduction region 113. According to this, the air flow from the air inlet 121 to the second opening (not shown) via the first opening 111 is not reduced excessively in the introduction region 113 without excessively reducing the flow passage area of the air. The function of reducing the flow rate of air from the first opening 111 to the second opening and the function of increasing the flow rate of air toward the distribution area 114 can be sufficiently exhibited.

  In other words, the flow dividing plate 119 in the example shown in FIG. 11 is provided in at least a part of the introduction area 113 which is an area where the air introduced from the air inlet 121 of the introduction part 120 flows into the main body 110. The flow rate of air from the first opening 111 to the second opening can be reduced without contacting the flow 115 to form a swirling flow, and the flow rate of air to the distribution area 114 can be increased. That is, the flow dividing plate 119 in the example shown in FIG. 11 functions well as a guide plate for guiding the air flowing into the introduction area 113 to the distribution area, and can constitute the above-described suppression structure.

  In the air blowing devices according to the examples shown in FIGS. 9 to 11 described above, the first opening 111 is not on the lower side (D side) of the central portion of the main body 110 but on the front side (F side). It is formed and the introducing | transducing part 120 is connected. However, as a matter of course, in the air blowing device according to each example shown in FIG. 9 to FIG. 11, the first opening 111 is formed in other places such as the lower side (D side) of the main body 110, for example. And the introduction unit 120 may be connected.

<effect>
As described above, the main body portion provided in the air blowing device according to the fifth device and the various modifications thereof is a partial region in which a plane orthogonal to the axis of the first cylinder intersects the first opening. There is a region. In this introduction region, the flow rate of air from the first opening to the second opening is reduced by the suppression structure, and the flow rate of air to the distribution region is increased.

  As a result of the above, as described above, the flow rate of the air flowing out from the distribution area to the discharge part is smaller than the flow rate of the air flowing out from the introduction area to the discharge part and the curtain air flow blown out from the air outlet is uniform It is possible to reduce the problem of deterioration in sex. That is, according to the fifth device, in the air blowing device that blows air from a part of the cylinder into the inside of the cylinder and blows out a curtain-like air flow from the opening formed in the cylinder, the structure becomes complicated and the pressure loss Can be made compatible with the downsizing of the air blowing device and the highly uniform air flow at a higher level while sufficiently reducing the increase of the air flow rate.

Sixth Embodiment
Hereinafter, an air blowing device according to the sixth embodiment of the present invention (hereinafter, may be referred to as a “sixth device”) will be described.

  As described above, in the device of the present invention, the air which has flowed from the second cylindrical body constituting the introduction part into the first cylindrical body constituting the main body part via the first opening part is the main body part The inside moves from the introduction area to the distribution area, and a part thereof flows into the third cylindrical body constituting the discharge part through the second opening, while the rest spreads to the end of the main body part. go. Thus, for example, when the second opening is configured as a single slit-like opening having a constant width, the pressure loss of air passing through the second opening is in the longitudinal direction of the second opening. If the pressure is constant, a pressure gradient is generated such that the air pressure is higher the closer to the introduction region and the air pressure is lower the further from the introduction region.

  When the pressure gradient is excessively large, the amount of flow is higher as it is closer to the introduction region and the amount of flow is smaller as it is further from the introduction region, even in the air flowing to the third cylinder that constitutes the discharge unit via the second opening. Flow gradient occurs. As a result, with the second opening on the opposite side, the uniformity of the flow velocity and the flow rate of the air blown out from the air outlet which is the opening of the discharge part may be reduced.

<Constitution>
Therefore, in the air blowing device according to the sixth device, the air blowing device according to any one of the fifth device and the fifth device described above, wherein the second opening has an opening area that increases with distance from the introduction region. It is an air blowing apparatus comprised.

  As a specific example, in the case where the second opening 112 is configured by a single slit-like opening having a longitudinal direction parallel to the axis of the first cylinder, for example, as illustrated in FIG. As shown, the second opening 112 can be configured such that the width (the size of the opening in the direction orthogonal to the longitudinal direction) of the slit-like opening is larger as it is farther from the introduction region. Further, in the case where the second opening is constituted by a plurality of discontinuous openings arranged along a direction parallel to the axis of the first cylindrical body, for example, as shown in (b) of FIG. The second openings 112 can be configured such that the sizes (opening areas) of the individual openings 112a increase with distance from the introduction region.

  The second opening is configured such that the opening area is continuously increased as the distance from the introduction region is increased, as long as, for example, the uniformity of the flow of the curtain-like air blown out from the air outlet is not adversely affected. The opening area may be configured to increase stepwise as the distance from the introduction region increases. In addition, a portion in which the opening area is continuously increased as the distance from the introduction region and a portion in which the opening area is gradually increased as the distance from the introduction region are mixed. May be

<effect>
According to the above configuration, it is possible to make the air flowing from the main body to the discharge part through the second opening less likely to flow as it is closer to the introduction region and easier to flow as it is farther from the introduction region. As a result, the flow rate gradient as described above can be reduced, and the uniformity of the flow rate and flow rate of the air blown out from the air outlet can be enhanced.

Seventh Embodiment
Hereinafter, an air blowing device according to a seventh embodiment of the present invention (hereinafter, may be referred to as a “seventh device”) will be described.

  As described above, in the device of the present invention, the air which has flowed from the second cylindrical body constituting the introduction part into the first cylindrical body constituting the main body part via the first opening part is the main body part The inside moves from the introduction area to the distribution area, and a part thereof flows into the third cylindrical body constituting the discharge part through the second opening, while the rest spreads to the end of the main body part. go.

  More specifically, as described above, a part of the air introduced into the main body through the first opening flows along the shape of the fin to form a swirling flow, and the second opening It flows into the discharge part from the main body part through the part, and is blown out as a curtain-like air flow from an air outlet which is an opening opposite to the second opening of the discharge part. On the other hand, the remaining part of the air introduced into the body through the first opening passes through the penetration region to the end of the body. Further, it is considered that there is a case where a part of the air forming the swirl flow flows into the penetration region, or a part of the air flowing through the penetration region contacts the fins to form the swirl flow.

  Therefore, for example, the first cross section of the internal space of the first cylinder constituting the main body is constant in the axial direction, and the cross section of the penetration region is also constant in the axial direction. When the ratio of the penetration area in the cross section of the internal space of the first cylinder by the plane orthogonal to the axis of the cylinder is constant over the axial direction, the flow rate of air increases as it is closer to the introduction area and is farther from the introduction area There is a flow rate gradient that the flow rate of air is so low.

  When the flow rate gradient is excessively large, the air flowing to the third cylinder constituting the discharge unit through the second opening also has a larger flow rate closer to the introduction region and a smaller flow rate farther from the introduction region Flow gradient occurs. As a result, the uniformity of the flow velocity and the flow rate of the air blown out from the air outlet which is the opening opposite to the second opening of the discharge part may be reduced.

<Constitution>
Therefore, in the seventh device, in the fifth device or the sixth device described above, the fin occupies the cross section of the internal space of the first cylinder by a plane orthogonal to the axis of the first cylinder. It is an air blowing apparatus comprised so that the ratio of an area | region may become large, so that it is far from the said introductory area | region.

  As a specific example, for example, as illustrated in (a) of FIG. 13, when the cross-sectional area of the internal space of the first cylindrical body that configures the main body portion 110 is constant in the axial direction, the introduction region 113 By configuring the fins 115 (115L and 115R) so that the cross-sectional area of the penetration region 116 (shaded portion) increases with distance from the (hatched portion), the first by a plane orthogonal to the axis of the first cylinder The ratio of the through region 116 to the cross section of the inner space of the cylindrical body can be increased as the distance from the introduction region 113 increases.

  Further, for example, as shown in (b) of FIG. 13, when the cross-sectional area of the penetration region 116 is constant in the axial direction, the first portion 110 is configured so as to be farther from the introduction region 113 (hatched portion). The first cylinder is configured such that the cross-sectional area of the internal space of the first cylinder is reduced, whereby the penetration in the cross section of the internal space of the first cylinder by the plane orthogonal to the axis of the first cylinder is achieved. The ratio of the area 116 (shaded area) can be increased as the distance from the introduction area 113 increases. In any of these cases, as the distance from the introduction region 113 increases, the amount of protrusion (height) of the fin from the inner wall of the first cylinder decreases.

  The ratio of the penetration region to the cross section of the internal space of the first cylinder by a plane orthogonal to the axis of the first cylinder is, for example, the uniformity of the flow of curtain-like air blown out from the air outlet, etc. As long as the adverse effect does not occur, the distance from the introduction region may be continuously increased, or the distance from the introduction region may be gradually increased. Further, there is a mixture of a portion configured such that the ratio increases continuously with distance from the introduction region, and a portion configured such that the ratio increases stepwise as the distance from the introduction region increases. May be

<effect>
According to the above configuration, the pressure loss of the air passing through the penetration area among the air introduced into the main body through the first opening decreases as the distance from the introduction area increases. Is easy to reach. As a result, the flow rate gradient as described above can be reduced, and the uniformity of the flow rate and flow rate of the air blown out from the air outlet can be enhanced.

Eighth Embodiment
Hereinafter, an air blowing device according to the eighth embodiment of the present invention (hereinafter, may be referred to as “eighth device”) will be described.

  As described above, in the device of the present invention, the air which has flowed from the second cylindrical body constituting the introduction part into the first cylindrical body constituting the main body part via the first opening part is the main body part The inside moves from the introduction area to the distribution area, and a part thereof flows into the third cylindrical body constituting the discharge part through the second opening, while the rest spreads to the end of the main body part. go. Therefore, for example, when the length (pitch) of the fin in the direction parallel to the helical axis of one rotation around the helical axis of the fin is constant over the longitudinal direction of the second opening, When the pressure loss of the air flowing from the introduction area side to the end of the main body in the distribution area is constant over the longitudinal direction of the second opening, the air pressure is higher as it is closer to the introduction area and the air pressure is higher as it is farther from the introduction area. The pressure gradient is low.

  When the pressure gradient is excessively large, the amount of flow is higher as it is closer to the introduction region and the amount of flow is smaller as it is further from the introduction region, even in the air flowing to the third cylinder that constitutes the discharge unit via the second opening. Flow gradient occurs. As a result, the uniformity of the flow velocity and the flow rate of the air blown out from the air outlet which is the opening of the discharge part on the opposite side to the second opening may be reduced.

<Constitution>
Therefore, according to an eighth apparatus, in the air blowing apparatus according to any one of the fifth apparatus to the seventh apparatus described above, the fin is the fin in a direction parallel to the helical axis for one rotation around the helical axis. The air blowing device is configured such that the pitch, which is the length of the distance, increases as the distance from the introduction area increases. In other words, in the eighth device, the fins are configured such that the frequency of presence of the fins in the helical axis direction of the fins decreases (the pitch of the fins increases) as the distance from the introduction region increases.

  As a specific example, for example, the pitch of the fins 115 (115L and 115R) in the example shown in FIG. 14 is P1, P2, P3 ... in order from the side closer to the introduction region 113 (shaded portion). The size of the pitch of P2 is P1 <P2 <P3. In this manner, the fins 115 can be configured such that the pitch increases as the distance from the introduction region 113 increases.

  In addition, the pitch of the fins in the eighth device is configured to increase continuously as it goes further from the introduction region, as long as the uniformity of the flow of the curtain-like air blown out from the air outlet is not adversely affected, for example. It may be configured to become larger gradually as it gets farther from the introduction area. In addition, even if there is a portion in which the pitch is continuously increased as the distance from the introduction region increases, and the portion in which the pitch is gradually increased as the distance from the introduction region increases. Good.

<effect>
As described above, the pressure loss of air passing through the inside of the main body increases as the pitch of the fins decreases, and the pressure loss of air passing through the inside of the main body decreases as the pitch of the fins increases. Therefore, according to the eighth device, since the pressure loss of the air passing through the inside of the main body decreases as the distance from the introduction region decreases, the flow rate gradient as described above is reduced, and the flow velocity of the air blown out from the air outlet and Flow uniformity can be improved.

  Next, one specific example of the air blowing device according to the embodiment of the present invention (hereinafter sometimes referred to as “the example device 101”) will be described in detail below with reference to the drawings.

<Constitution>
FIG. 15 is a schematic perspective view showing the configuration of the example apparatus 101. As shown in FIG. The example device 101 includes a main body 110 including a first cylinder, an introduction unit 120 including a second cylinder, and a discharge unit 130 including a third cylinder. A first opening 111 is formed as a through hole having a size and a shape corresponding to the joint surface between the first cylinder and the second cylinder in a part (central part in the longitudinal direction) of the main body 110. It is formed. The main body portion 110 and the introducing portion 120 are airtightly connected so that the internal space of the first cylindrical body and the internal space of the second cylindrical body communicate with each other through the first opening 111. Further, the side surface of the main body portion 110 has a longitudinal direction parallel to the axis of the first cylinder and has a size and shape corresponding to the joint surface between the first cylinder and the third cylinder. A second opening 112 is formed. The main body portion 110 and the discharge portion 130 are airtightly connected so that the internal space of the first cylindrical body and the internal space of the third cylindrical body communicate with each other through the second opening 112.

  In addition, the example device 101 further includes a fin 115 formed in the distribution area 114 which is a partial area of the internal space of the first cylindrical body. The distribution area 114 is a partial area of the internal space of the first cylinder in which a plane perpendicular to the axis of the first cylinder does not intersect the first opening 111. The fin 115 provided in the example device 101 is configured such that the helical axis of the fin 115 coincides with the axis of the first cylinder, and as shown in (a) of FIG. And has a double helical shape with a helical axis parallel to the axis of the first cylinder and projecting from the inner wall of the. As shown in FIG. 16, the fin 115 provided in the example device 101 has a smooth double spiral shape formed of a helically twisted elongated plate-like member. In addition, in the projection on a plane orthogonal to the axis of the first cylinder, there is a through region 116 in which the fins 115 are not formed in the plane of the first cylinder, as described above with reference to FIG. (See FIG. 16 (b)).

  Furthermore, in the example device 101, the introduction is a partial region of the internal space of the first cylinder where the plane orthogonal to the axis of the first cylinder constituting the main body 110 intersects the first opening 111. Suppression is a structure configured to reduce the flow rate of air from the first opening 111 to the second opening 112 to the area 113 and increase the flow rate of air to the distribution area 114 (114L and 114R) A guide plate as a structure is provided. In the example shown in FIG. 15, the guide plate is a flat member (dividing plate 119) having a main surface intersecting the axis of the first cylinder.

  FIG. 17 is a schematic view showing the structure of the example device 101 shown in FIG. (A) is a schematic perspective view in the case where the example device 101 is observed from the near side (rear side, B side). (B) is a schematic perspective view when the example device 101 cut along a plane including the line B-B in (a) and orthogonal to the axis of the first cylinder is observed from the left side (L side) FIG. (C) is a schematic cross-sectional view of the example device 101 taken along a horizontal plane including the line C-C in (a) (a plane including the front-rear direction (F-B direction) and the left-right direction (LR direction)) is there.

  FIG. 18 is a schematic cross-sectional view showing the structure around the introduction region 113 in the example device 101 shown in FIG. (A) of FIG. 18 is a schematic view of the introducing portion 120 when observed from the air inlet 121 side, and (b) configures the axis HA of the first cylindrical body constituting the main body portion 110 and the introducing portion 120. It is the schematic of the periphery of the introductory area | region 113 when the cross section by the plane containing the axis | shaft AX of a 2nd cylinder is observed from an upper side (U side). FIG. 18C is a cross-sectional view of the periphery of the introduction region 113 by a plane orthogonal to the axis HA of the first cylinder and including the axis AX of the second cylinder, and FIG. 3A and 3B are cross-sectional views of the main body portion 110 and the discharge portion 130 in a plane orthogonal to the axis HA of the cylindrical body and including the line X shown in (b).

<effect>
In the embodiment apparatus 101 having the configuration as described above, a part of the air introduced from the introduction part 120 to the main body part 110 through the first opening flows along the shape of the fin 115 and turns Flow from the main body 110 to the discharge part 130 through the second opening 112, and from the air outlet 131 which is an opening opposite to the second opening 112 of the discharge part 130. It is blown out as an air stream. On the other hand, the remaining part of the air introduced into the main body 110 through the first opening 111 can easily reach the end of the main body 110 through the penetration region 116. Also, a part of the air forming the swirling flow may flow into the penetration region 116, or a portion of the air flowing through the penetration region 116 may contact the fins 115 to form the swirling flow. is there.

  As a result of the above, in the example device 101, the air in the second opening 112 is more uniform (for example, in a state where the variation in the flow velocity and the flow rate of the air in the longitudinal direction of the second opening 112 is small). Can be distributed (distributed and diffused). Then, the air thus distributed is blown out from the air outlet 131 via the second opening 112 and the discharge part 130. That is, according to the embodiment apparatus 101, it is possible to blow out a curtain-like air flow with high uniformity.

  Further, in the example device 101, as described above, a part of the air introduced into the main body 110 can easily reach the end of the main body 110 through the penetration region 116. This makes it difficult for the air passing through the inside of the main body 110 to reach the end of the main body 110 due to the pressure loss accompanying the flow of the fins 115 to form the swirling flow. It is also possible to prevent the flow velocity and the flow rate of the air blown out from the end of the air outlet 131 from being reduced.

  Furthermore, as described above, the example device 101 is a diversion as a suppression structure disposed in the introduction region 113 which is a partial region where a plane orthogonal to the axis of the first cylinder intersects the first opening. A plate 119 is provided. Thus, the flow rate of air from the first opening 111 to the second opening 112 in the introduction area 113 is reduced, and the flow rate of air toward the distribution area 114 is increased. As a result, the difference between the flow rate of air flowing out from the distribution area to the discharge area and the flow rate of air flowing out from the introduction area to the discharge area becomes smaller, and uniformity of the curtain-like air flow blown out from the air outlet 131 Improve more.

  That is, according to the example device 101, in the air blowing device that blows air from a part of the cylinder into the inside of the cylinder and blows out a curtain-like air flow from the opening formed in the cylinder, the structure is complicated and the pressure is increased. It is possible to achieve both downsizing of the air blowing device and highly uniform air flow while sufficiently reducing the increase in loss.

  Next, another specific example of the air blowing device according to the embodiment of the present invention (hereinafter sometimes referred to as "the example device 102") will be described in detail below with reference to the drawings. . Incidentally, as shown in FIG. 16, the fins provided in the above-described embodiment device 101 have a smooth single spiral shape formed of a long and thin plate member spirally twisted. On the other hand, in the example device 102, the fins are configured by a combination of a plurality of (non-twisting) flat members for the purpose of preventing the undercut described above.

  Except for the points described above, the example device 102 has the same configuration as the example device 101. Therefore, in the following description of the example device 102, the contents related to the same configuration as that of the example device 101 will be briefly described, and the configuration of the fin will be described in detail.

<Constitution>
FIG. 19 is a schematic perspective view showing the configuration of the example apparatus 102. As shown in FIG. Similarly to the example apparatus 101, the example apparatus 102 also includes a main body 110 including a first cylinder, an introduction part 120 including a second cylinder, and a discharge part 130 including a third cylinder. . A first opening 111 is formed in a part (central part in the longitudinal direction) of the main body 110, and the internal space communicates with the main body 110 via the first opening 111. It is airtightly connected with the introductory part 120. Further, the side surface of the main body portion 110 has a longitudinal direction parallel to the axis of the first cylinder and has a size and shape corresponding to the joint surface between the first cylinder and the third cylinder. The second opening 112 is formed, and the main body 110 and the discharge unit 130 are airtightly connected so that the internal spaces of the second opening 112 communicate with each other through the second opening 112.

  The example device 102 also includes fins 115 formed in the distribution area 114 which is a partial area of the internal space of the first cylinder. The fin 115 provided in the example device 102 is also configured such that the helical axis of the fin 115 coincides with the axis of the first cylinder. However, as shown in (a) of FIG. 20, in the fin 115 provided in the example device 102, the fin is configured by a combination of a plurality of (non-twisting) flat members 115p. Thereby, for example, undercutting in the case of forming the fins 115 can be prevented. Therefore, by configuring the mold so that the mold release direction coincides with the in-plane direction of the flat plate-shaped member 115p constituting the fin 115, division of the mold for avoiding undercut is not necessary. , And fins 115 can be formed.

  Furthermore, a main body having a desired length by molding one flat plate member 115p and the portion of the first cylinder corresponding to the member 115p as one unit and connecting a predetermined number of the units. The unit 110 can be easily configured.

  In the embodiment apparatus 102, as in the embodiment apparatus 101, the fin 115 has a double spiral shape which protrudes from the inner wall of the first cylinder and has a helical axis parallel to the axis of the first cylinder. It has a shape. As described above with reference to FIG. 7, the fin 115 is configured such that the through region 116 in which the fin 115 is not formed is present in the projection on a plane orthogonal to the axis of the first cylinder. (See FIG. 20 (b)).

  The apparatus 102 according to the embodiment has the same configuration as the apparatus 101 according to the embodiment other than the above, and thus the detailed description thereof will be omitted. 19 is a schematic view showing the structure of the embodiment apparatus 102 shown in FIG. 19 and FIG. 22 is a schematic sectional view showing the structure around the introduction region in the embodiment apparatus 102 shown in FIGS. Respectively correspond to FIG. 17 and FIG. 18 described above.

<effect>
Also in the embodiment apparatus 102 having the above-described configuration, similarly to the embodiment apparatus 101, the air is blown into the interior of the cylinder from a part of the cylinder, and a curtain-like air flow is generated from the opening formed in the cylinder. In the air blowing device for blowing out the air blowing device, the miniaturization of the air blowing device and the highly uniform air flow can be compatible while sufficiently reducing the complication of the structure and the increase of the pressure loss.

  Furthermore, computational fluid dynamics (CFD) analysis is performed on the air blowing device according to the present invention (the device of the present invention) and the air blowing device according to the prior art (the conventional device). The results of investigation of the velocity distribution of the air flow blown out from the streamline and the air outlet are shown in FIG.

<Constitution>
The test air blowing devices A to E (hereinafter referred to as “apparatus A” to “apparatus E” respectively) to be subjected to CFD analysis all have the same configuration except that the configuration of the fins in the main body is different. Have. First, the device A is an example of an air blowing device (conventional device) according to the prior art in which the main body portion is not provided with a fin. Next, in the device B, as in the device described in Patent Document 2 described above, the fins provided in the main body portion are configured by a helical ribbon structure. That is, the device B is an example of an air blowing device (conventional device) according to the prior art.

  On the other hand, the devices C and D include fins having a coiled double spiral structure as shown in FIG. That is, the devices C and D are examples of the air blowing device (the device of the present invention) according to the present invention. In the device C, the amount of projection (height) of the fin from the inner wall of the first cylinder is 7 mm, whereas in the device D, the amount of projection (height) of the fin is 5 mm. Furthermore, device E comprises a fin having a coiled double helix structure as shown in FIG. More specifically, in the device E, a fin is configured by a combination of a plurality of (twist-free) flat members in order to prevent the undercut described above. That is, the device E is also an example of the air blowing device (the device of the present invention) according to the present invention. In the device E, the amount of projection (height) of the fin from the inner wall of the first cylinder is 5 mm.

<Analysis result>
(1) Pressure Loss The results of measuring the pressure loss (pressure loss) at an air volume of 255 m ³ / h for the above-described devices A to E are listed in FIG. Apparatus A, which is a conventional apparatus in which the main body portion is not provided with fins, showed a pressure loss of 313 Pa. On the other hand, the device B, which is a conventional device including a fin whose main body portion is formed of a helical ribbon structure, showed a large pressure loss of 468 Pa. In contrast to device B, devices C through E, which are devices of the present invention having the above-described penetration region as a result of the fins having a coiled double helix structure, all exhibited lower pressure loss than device B.

  In particular, device C with a smooth spiral fin having a height of 7 mm showed a pressure drop of up to 414 Pa. Device D with a smooth spiral fin with an even lower 5 mm height exhibited an even lower pressure drop of 363 Pa. Although the device E is provided with a fin having a height of 5 mm similarly to the device D, an undercut countermeasure (UC countermeasure) for preventing the undercut described above is applied. Specifically, the fins included in the device E are not smooth spiral fins like the devices C and D, but have fins formed by a combination of a plurality of (non-twisting) flat members. There is. In such a device E, a pressure drop as low as 378 Pa equivalent to the device D was achieved.

  As described above, according to the device of the present invention, a lower pressure loss can be achieved as compared to the conventional device (device B) in which the main body portion is provided with fins constituted by a helical ribbon structure.

(2) Streamline Next, a stream line indicating the flow of air in the above-described devices A to E was determined by CFD analysis. As shown in FIG. 23, in the device A, which is a conventional device in which the main body portion is not provided with fins, although the air flow reaches the end of the main body portion, the streamlines of the air blown out from the air outlet The density of is uneven. On the other hand, in the apparatus B which is a conventional apparatus provided with a fin whose main body portion is formed of a helical ribbon structure, the air introduced from the air inlet of the introduction portion flows into the main body portion. The streamlines of the air blown out from the close air outlet increased. However, the flow of the air did not reach the end of the main body (the portion surrounded by the broken line), and the streamline of the air blown out from the end of the air outlet far from the introduction region was reduced. Thus, in the apparatus A and the apparatus B which are the conventional apparatuses, it was confirmed that the air volume of the air blown out from the air outlet was uneven.

  On the other hand, in the devices C to E according to the devices of the present invention provided with fins having a coiled double spiral structure, the air flow reaches the end of the main body (portion enclosed by the broken line) . As a result, the air is also blown out from the end of the air outlet far from the introduction area, and the streamlines of the air blown out from the air outlet are also uniformly distributed. That is, it was confirmed that the uniformity of the air volume of the air blown out from the air outlet was high in the devices C to E which are the devices of the present invention.

(3) Velocity Distribution Next, the flow velocity distribution showing the distribution of the flow velocity of the air blown out from the air outlet of the above-mentioned devices A to E was determined by CFD analysis. Similar to the streamlines described above, in the device A, which is a conventional device in which the main body portion is not provided with fins, the end portion of the air outlet reflects the fact that the flow of air reaches the end portion of the main body portion. Although air is also blown out from the air flow velocity distribution is uneven. On the other hand, in the device B, which is a conventional device including a fin whose main body portion is formed of a helical ribbon structure, the flow velocity of air blown out from the air outlet close to the introduction region increases, but the end portion of the main body portion The flow velocity of the air blown out from the side far from the introduction area of the air outlet is low, reflecting that the air flow has not reached to. As described above, it was confirmed that the distribution of the flow velocity of the air blown out from the air outlet was uneven in the device A and the device B, which are the conventional devices.

  On the other hand, in the devices C to E which are the devices of the present invention provided with fins having a coiled double spiral structure, the introduction region reflects the fact that the air flow has reached the end of the main body. Air is also blown out from the end of the air outlet on the far side, and the flow velocity distribution of the air is uniform throughout the air outlet. That is, in the apparatus C to the apparatus E according to the present invention, it was confirmed that the distribution of the flow velocity of the air blown out from the air outlet was uniform.

  While certain embodiments have been described, and for purposes of illustrating the invention, certain configurations and examples have been described, sometimes with reference to the accompanying drawings, the scope of the invention is to be considered as illustrative of those embodiments. It should not be construed as being limited to the embodiments and examples, and it goes without saying that modifications can be made as appropriate within the scope of the matters described in the claims and the specification.

  100, 101 and 102 air blow-out device 110 main body 111 first opening 112 second opening 112r rib 113 introduction area 114 114L and 114R distribution area 115 , 115L and 115R: fin, 115p: flat member (component of fin 115), 116: penetrating region, 117: third opening, 118, 118L and 118R, guide plate, 119: shunt plate, 120: 120 Introduction part, 121 ... air inlet, 130 ... discharge part, and 131 ... air outlet,

Claims (12)

A main body including a first cylinder, an introduction unit including a second cylinder, and a discharge unit including a third cylinder;
A first opening is formed in a part of the main body,
The side surface of the main body portion is formed with a second opening having a longitudinal direction parallel to the axis of the first cylinder,
The main body portion 110 and the introduction portion 120 are connected so that the internal space of the first cylindrical body and the internal space of the second cylindrical body communicate with each other through the first opening 111. Yes,
The main body portion 110 and the discharge portion 130 are connected such that the internal space of the first cylindrical body and the internal space of the third cylindrical body communicate with each other through the second opening 112. Yes,
An air blowing device,
In at least a part of the distribution area which is a partial area of the internal space of the first cylinder in which a plane orthogonal to the axis of the first cylinder does not intersect the first opening, the first cylinder And a fin having a single spiral or multi-helix shape, having a helical axis projecting from the inner wall of the first cylinder and parallel to the axis of the first cylinder,
The fins are configured such that there is a through region which is a region in which the fins are not formed in a projection onto a plane orthogonal to the axis of the first cylinder.
Air blowing device. In the air blowing device according to claim 1,
The internal space of the discharge part extends from the second opening along the flowing direction of the air introduced from the introduction part to the main body part through the first opening and swirled by the fin. And the discharge part is connected to the main body part to
Air blowing device. An air blowing device according to claim 1 or 2, wherein
Both ends of the main body in the axial direction of the first cylinder are closed,
Air blowing device. An air blowing device according to claim 1 or 2, wherein
A third opening is formed in at least one of both ends of the main body in the axial direction of the first cylinder.
Air blowing device. The air blowing device according to any one of claims 1 to 4, wherein
From the first opening to the introduction region, which is a partial region of the internal space of the first cylinder where a plane orthogonal to the axis of the first cylinder intersects the first opening. A suppression structure is provided which is configured to reduce the flow of air towards the opening of the air flow and to increase the flow of air towards the distribution area,
Air blowing device. In the air blowing device according to claim 5,
The suppression structure is configured to increase a pressure loss of air from the first opening to the second opening.
Air blowing device. In the air blowing device according to claim 6,
The suppression structure is configured to reduce a cross-sectional area of a flow path of air directed from the first opening to the second opening.
Air blowing device. The air blowing device according to any one of claims 5 to 7.
The restraining structure includes a guide plate for guiding the air flowing into the introduction area to the distribution area.
Air blowing device. In the air blowing device according to claim 8,
The guide plate is a flat member having a main surface intersecting with the axis of the first cylinder.
Air blowing device. The air blowing device according to any one of claims 5 to 9.
The second opening is configured such that the opening area increases as the distance from the introduction region increases.
Air blowing device. The air blowing device according to any one of claims 5 to 10.
The fin is configured such that the ratio of the penetration region to the cross section of the internal space of the first cylinder by a plane orthogonal to the axis of the first cylinder increases as the distance from the introduction region increases.
Air blowing device. The air blowing device according to any one of claims 5 to 11.
The fins are configured such that a pitch, which is a length of the fins in a direction parallel to the helical axis for one rotation around the helical axis, increases as the distance from the introduction region increases.
Air blowing device.