JP2011226703A - Natural air supply unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a natural air supply unit that has excellent air tightness and operatability, and also has side shutters reducing ventilation resistance by sufficiently widening an opening area when fully opened.SOLUTION: The natural air supply unit has a pipe guide 10 communicating to a natural air supply port opening to the wall face of an indoor side and having a sucking port 11 sucking outdoor air, a grill 20 formed in a flat box shape, connected to the indoor side of the pipe guide 10, forming blowing out ports in the sides, and forming a wind channel inducing and guiding outdoor air from the sucking port to the blowing out ports together with pipe guide 10, and a filter arranged in the wind channel and filtering the sucked outdoor air, the grill 20 has side shutters 50 opening and closing the side blowing out ports 25, the side shutters 50 is constituted by including a pair of rail 57 arranged facing the side blowing out port 25 and side shutter plates 51 supported slidably to the rails 57.

Description

  The present invention relates to a natural air supply unit in which an air passage for taking in outside air from outside to indoor by natural air supply is formed.

  In a ventilator that takes in outside air from the outside to the inside, there is a risk that wind, rain, cold, dust, or the like may enter from the ventilation path leading to the outside. Therefore, a mechanism for covering and protecting the end of the ventilation path is provided.

  Especially, in the ventilator attached to the ventilation opening opened to the wall surface on the indoor side, the grill portion is installed so as to protrude from the indoor wall surface. And in a ventilator that takes in outside air from the outside to the inside, an opening for taking outside air into the room is formed on the front of the grill with the blowing direction upward so that the outside air taken from outside does not directly hit the human body. A blower outlet is formed on the side of the grill. As for the sideways blowout, do not blow down to the side to prevent the cold air in the winter from directly affecting the body, or to prevent the surrounding walls from getting dirty. There is also a structure in which an outlet is provided only in the direction.

  In such a ventilator that takes in outside air from the outside to the inside, conventionally, a side shutter that can be opened and closed is provided at the air outlet formed on the side of the grill so that the air outlet direction can be changed and the air outlet can be closed, so It has been proposed to reduce the feeling (for example, Patent Document 1).

JP 2009-229057 A

  However, the ventilator disclosed in the above-mentioned patent document is equipped with driving means such as a blower fan and performs forced ventilation between the outdoors and indoors. It is not a natural air supply unit that is provided at the end of an open third type ventilation (natural air supply port) path and performs natural air supply between outdoors and indoors.

  The natural air supply unit in which the air passage for taking in the outside air from the outside to the inside by natural air supply is relatively small and has a simple structure. That is, in the conventional natural air supply unit, the blowing direction of the air outlet provided on the indoor side is fixed, and there is no device that can change the wind direction or close the opening. Therefore, a natural air supply unit having a side shutter has been demanded.

  Furthermore, the side shutter of the ventilator disclosed in the above patent document does not ensure sufficient airtightness, is not sufficiently operable, and has a sufficiently wide opening area when fully opened. There was no improvement, so improvement was desired.

  The present invention has been made in view of the above, and in a natural air supply unit that performs natural air supply, reduces wall dirt and cold air feeling due to the air supply airflow, and realizes with a simple structure without increasing cost. Another object of the present invention is to provide a natural air supply unit having a side shutter that reduces the ventilation resistance by making the opening area when fully opened by sufficiently widening the opening area.

  In order to solve the above-described problems and achieve the object, the natural air supply unit according to the present invention is a natural air supply unit that performs natural air supply between the outdoors and indoors, and opens to the wall surface on the indoor side. A cylinder having a suction port that communicates with the natural air inlet and sucks outside air, and is formed in a flat box shape and is connected to the indoor side of the cylinder to form a blow-off port on the side surface. A main body that forms an air passage that guides and guides the air, and a filter that filters outside air provided in the air passage, and the main body has a side shutter that opens and closes the air outlet, and the side shutter faces the air outlet. And a pair of rails provided on the rails and a side shutter plate slidably supported on the rails.

  According to the natural air supply unit according to the present invention, the main body has a side shutter that opens and closes the air outlet. Therefore, in the natural air supply unit that performs natural air supply, wall surface dirt and cold wind sensation due to the air supply airflow are detected. Further, the side shutter is configured to include a pair of rails provided to face the air outlet and the side shutter plate slidably supported by the rails, so that the cost increases. It can be realized with a simple structure without any problems, and has the effect of excellent airtightness and good operability.

FIG. 1 is a perspective view showing the entire natural air supply unit according to the present invention. FIG. 2 is a perspective view illustrating a state where the filter is removed by separating the grill and the pipe guide of the natural air supply unit of FIG. 1. FIG. 3 is an exploded perspective view showing a state where the grill is further disassembled from the state of FIG. FIG. 4 is a perspective view showing a state where the airway shutter is half opened with the front panel removed. FIG. 5 is a perspective view showing a state in which the airway shutter is fully closed with the front panel removed. FIG. 6 is a perspective view showing the natural air supply unit cut in half. FIG. 7 is an enlarged perspective view showing a portion C of FIG. FIG. 8 is a cross-sectional view showing a state where the airway shutter is fully closed. FIG. 9 is a perspective view showing a state where the operation lever is engaged with the notch of the notch plate. FIG. 10 is an enlarged perspective view of a portion F in FIG. 9 showing a state where the operation lever is engaged with the notch. FIG. 11 is an enlarged perspective view of a portion F in FIG. 9 showing a state in which the operation lever is detached from the notch. FIG. 12 is a perspective view showing a state in which the side shutter is fully closed. FIG. 13 is a perspective view showing a state in which the side shutter is fully opened. FIG. 14 is a cross-sectional view of the main part showing a state in which one side shutter is fully closed and the other side shutter is fully opened. FIG. 15 is a perspective view of a single side shutter plate. FIG. 16 is an enlarged perspective view showing the end portion of the side shutter plate in an enlarged manner. FIG. 17 is an enlarged perspective view showing the rail portion of the side shutter of the grill with the front panel removed. 18 is a partial cross-sectional view taken along the line GG in FIG. 14 showing a state in which the side shutter is fully opened. FIG. 19 is a partial cross-sectional view taken along the line GG in FIG. 14 showing the side shutter fully closed. FIG. 20 is a perspective view, partly in section, showing how the knob straddles the outer wall of the grill when the side shutter is fully opened.

  Embodiments of a natural air supply unit according to the present invention will be described below in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

Embodiment.
FIG. 1 is a perspective view showing the entire natural air supply unit according to the present invention. FIG. 2 is a perspective view illustrating a state where the filter is removed by separating the grill and the pipe guide of the natural air supply unit of FIG. 1. FIG. 3 is an exploded perspective view showing a state where the grill is further disassembled from the state of FIG.

[Overview]
The natural air supply unit 100 of the present embodiment is a natural air supply unit that does not have a driving unit such as a blower fan and performs natural air supply between outdoors and indoors. The natural air supply unit 100 includes a pipe guide (cylindrical body) 10 having a suction port 11 for sucking outside air, and a flat rectangular box shape, which is connected to the indoor side of the pipe guide 10 and has an outlet (upper outlet 24, A grill (main body) 20 that forms a side air outlet 25), and an outside air cleaning filter (hereinafter referred to as a filter) 18 that is provided in an air passage between the pipe guide 10 and the grill 20 and filters the sucked outside air. (Fig. 3).

  The pipe guide 10 has a cylindrical shape, and is generally connected to a pipe (not shown) installed in a hole penetrating a wall surface that divides the outdoors and indoors. On the grill 20 side of the pipe guide 10, a rectangular flange portion 12 having substantially the same dimensions as the rectangular grill 20 is provided in order to be connected to the grill 20. Inside the cylinder on the grill 20 side where the flange portion 12 is formed, there is provided a lattice frame 15 in which flat plates are arranged in a lattice shape in order to accommodate a filter 18 made of disk-formed fibers. (FIGS. 2 and 3). The lattice frame 15 is composed of a very thin flat plate so that the resistance given to the airflow passing through the air passage is reduced.

  The grill 20 has a flat rectangular box shape, and the front surface is entirely covered with a front panel 22. A polyethylene foam, which is a heat insulating material for preventing condensation, is attached to the entire rear surface of the front panel 22. Three air outlets are provided on the side surface of the grill 20. The upper air outlet 24 provided on the upper surface is always open. A side shutter plate 51 is provided at the side air outlet 25 provided on the side surface in order to adjust the air volume and direction. On the back surface of the grill 20 connected to the pipe guide 10, an opening having an area of about 2/3 of the cross section of the pipe guide 10 is formed at a connection position with the pipe guide 10. A lattice frame 23 having the same structure is provided to sandwich the filter 18 in cooperation with the lattice frame 15 of the guide 10.

  The grill 20 having such a configuration functions to distribute the air sucked from the suction port 11 in three directions. That is, the pipe guide 10 and the grill 20 form an air passage that guides and guides outside air from the suction port 11 to the air outlet (upper air outlet 24, side air outlet 25) as shown by a dotted arrow in FIG. Yes. The grill 20 has an air passage shutter 40 that opens and closes the air passage.

  FIG. 4 is a perspective view showing a state where the airway shutter 40 is half opened with the front panel 22 removed. FIG. 5 is a perspective view showing a state in which the airway shutter 40 is fully closed with the front panel 22 removed. FIG. 6 is a perspective view showing the natural air supply unit 100 cut in half. FIG. 7 is an enlarged perspective view showing a portion C of FIG. As shown in FIGS. 4 and 5, the airway shutter 40 is a slide shutter of a type in which the two main shutter plates 42, 43 slide in conjunction with each other and protrude from the storage portion 44.

  An operating lever 46 for projecting the lower end portion from the lower portion of the grill 20 is connected to the main shutter plates 42 and 43 formed by dividing the movable portion into two parts. As shown by an arrow B in FIG. By sliding the operation lever 46 to the left and right, the main shutter plates 42 and 43 are interlocked to open and close.

[Filter and lattice frame]
The filter 18 is provided in the air path and filters the sucked outside air, thereby preventing intrusion of dust and insects. The filter 18 is sandwiched and held between the pipe guide 10 and the grill 20 as described above. However, the pipe guide 10 and the grill 20 can be attached and detached by releasing the engaging portions of each other. Thus, the filter 18 is detachable. For the purpose of holding the filter 18 so as to withstand the wind pressure and preventing the deformation of the filter 18, as described above, the lattice frame 23 is provided on the grill 20 side (FIGS. 4 and 6), and the pipe guide 10. A lattice frame 15 is provided on the side (FIGS. 2 and 6).

  Since the lattice frame 23 has a predetermined width in the axial direction of the pipe guide 10, a space is formed between the main shutter plates 42 and 43 and the filter 18 by the lattice frame 23. If the main shutter plates 42 and 43 and the filter 18 are close to each other, the flow of air can be passed only through the portion of the filter 18 corresponding to the opening of the air passage shutter 40, but the main shutter plates 42 and 43 and the filter 18 By separating a predetermined distance, it becomes possible to filter the circulating air through the entire filter 18, diffuse the processing air volume per unit area of the filter 18, and reduce the ventilation resistance. As will be described later, the vertical frame 23 </ b> A extending in the vertical direction of the lattice frame 23 also serves as a stopper for the main shutter plate 43.

[Airway shutter configuration]
An airway shutter 40 is provided inside the grill 20. The airway shutter 40 is connected to the main shutter plates 42 and 43, the lower rail 47 and the upper rail 48 that hold the main shutter plates 42 and 43 slidably, and the main shutter plate 42. Are configured to include an operation lever 46 that slides and a notch plate 49 that locks the operation lever 46 at an arbitrary position and thereby adjusts the opening area of the air passage shutter 40 in multiple stages.

[Airway shutter structure and operation]
A lower rail 47 and an upper rail 48 are provided along the upper and lower sides of the flat rectangular box-shaped grill 20. The two main shutter plates 42 and 43 have a substantially rectangular flat plate shape and are accommodated in the lower rail 47 and the upper rail 48 so that the upper and lower sides can slide. When the air passage shutter 40 is fully open, the main shutter plates 42 and 43 are stored (overlapped) in the storage portion 44. By storing the main shutter plates 42 and 43 in the storage portion 44, the main shutter plates 42 and 43 are prevented from rattling or coming off due to wind pressure.

  No air outlet is formed on the bottom surface of the grill 20, and a slide slit 20 b that extends over substantially the entire length in the longitudinal direction of the bottom surface is perforated. The operation lever 46 has a lower end portion serving as a handle protruding outside from the slide slit 20b. The operation lever 46 is pivotally supported at the upper end of the rotary shaft 20a provided upright on the grille 20 above the main shutter plates 42, 43 and guided at the lower end by the slide slit 20b. 43 can be tilted in the sliding direction.

[Synchronized operation structure]
FIG. 8 is a cross-sectional view showing a state where the airway shutter is fully closed. As shown in FIG. 4, the main shutter plate 42 is connected to the operation lever 46 by loosely fitting a connection convex portion 42 a formed in the lower part on the back surface to a connection concave portion 46 a provided in the operation lever 46. Then, the control lever 46 is slid along the rails 47 and 48 by sliding.

  When the operation lever 46 is moved in the direction of arrow D shown in FIG. 8 when the airway shutter 40 is changed from the open state to the closed state, the main shutter plate 42 moves in the direction of the arrow D in conjunction with the operation lever 46. Hooks the convex portion 42 b formed along the edge portion to the convex portion 43 a formed along the edge portion of the main shutter plate 43, and pulls the main shutter plate 43 out of the storage portion 44. When the airway shutter 40 is fully closed, the main shutter plate 43 is pressed against the vertical frame 23A by the convex portion 43c that is partially in contact with the center of the rear side edge. 42b and the vertical frame 23A. That is, the vertical frame 23 </ b> A also serves as a stopper for the main shutter plate 43.

  On the other hand, when the airway shutter 40 is changed from the closed state to the open state, when the operation lever 46 is moved in the direction of arrow E shown in FIG. 8, the main shutter plate 42 is moved in the direction of arrow E, and the convex portion 42b is moved to the main portion 42b. The main shutter plate 43 is pushed toward the storage portion 44 by contacting the convex portion 43b on the opposite side of the shutter plate 43. As a result, the two main shutter plates 42 and 43 are stored in the storage portion 44 so as to overlap each other.

[Notch structure]
FIG. 9 is a perspective view showing a state in which the operation lever 46 is engaged with the notch of the notch plate 49. FIG. 10 is an enlarged perspective view of a portion F in FIG. 9 showing how the operation lever 46 is engaged with the notch. FIG. 11 is an enlarged perspective view showing a state in which the operation lever 46 is detached from the notch. A notch plate 49 is provided integrally with the lower rail 47 on the apparatus front side of the lower rail 47 of the main shutter plates 42 and 43. The notch plate 49 is formed with a plurality of notches 49a as notches with which the operation lever 46 is engaged. On the other hand, in the cross section of the operation lever 46, an engagement convex portion 46b extending in the axial direction is formed at a position corresponding to the notch plate 49, as shown in FIGS. As described above, the operation lever 46 is supported by the rotating shaft 20a at the upper end of the main shutter plates 42 and 43 and guided by the slide slit 20b at the lower end portion, so that the slide of the main shutter plates 42 and 43 is performed. It is possible to tilt in the direction.

  The operating lever 46 tilts and the engaging projection 46b engages with an arbitrary notch 49a to hold the main shutter plates 42 and 43 at an arbitrary position, thereby making the opening area of the airway shutter 40 arbitrary. As an amount, it is possible to adjust the air supply amount of the natural air supply unit 100. That is, the operation lever 46 and the notch plate 49 constitute opening area adjusting means for adjusting the air supply air volume of the natural air supply unit 100 in multiple stages. When the operation lever 46 is engaged with the notch 49a, it is not stressed and is straight, but when the notch 49a is removed, both ends are supported by the rotating shaft 20a and the slide slit 20b. However, the intermediate portion is lifted upward by the notch plate 49 and slightly bowed. As a result, an elastic stress is generated in the operation lever 46, and an appropriate frictional force is generated between the operating lever 46 and the slide slit 20b, so that the sliding operation can be performed with no looseness and good operability.

[Assembly process]
On the side wall 48a on the front side of the upper rail 48 in the vicinity of the storage position of the main shutter plates 42 and 43, a wall deletion portion 48c shorter than the width of the main shutter plates 42 and 43 by a predetermined length is formed. (FIGS. 4, 5, and 9). Then, the main shutter plates 42 and 43 are deformed so as to be slightly curved in a state where the lower side portion is inserted into the lower rail 47, and the main shutter plates 42 and 43 are removed from the wall-deleted portion 48c. It can be built in. Once the main shutter plates 42 and 43 are incorporated into the rails 47 and 48, the wall-deleting portion 48c is shorter than the width of the main shutter plates 42 and 43 by a predetermined length, so that the main shutter plates 42 and 43 will not fall out of the main shutter plates 42 and 43.

  As shown in FIG. 7, the front side wall 47 a of the lower rail 47 is higher than the rear side wall 47 b of the lower rail 47. This prevents moisture from mist or wind and rain sucked together with outside air from flowing over the side wall 47a on the front side and flowing out indoors. In this case, the lower rail 47 also serves as a drainage path for the moisture.

[Side shutter]
FIG. 12 is a perspective view showing a state in which the side shutter 50 is fully closed. FIG. 13 is a perspective view showing a state in which the side shutter 50 is fully opened. FIG. 14 is a cross-sectional view of an essential part showing a state in which one side shutter 50 is fully closed and the other side shutter 50 is fully opened. As described above, the side surface of the grill 20 is provided with three air outlets, the upper air outlet 24 provided on the upper surface is always open, and the side air outlet 25 provided on the side surface has a side surface. A shutter 50 is provided. By providing the side shutter 50, it is possible to restrict the airflow in the direction in which it is desired to reduce the airflow control to the wall surface side and the cool air feeling. In addition, since the blowout to the downward direction of the grille 20 becomes a direction in which the human body is most susceptible to the cold wind, the opening as ventilation is closed.

  The side air outlet 25 is formed on the front side of the side surface of the grill 20. The side shutter 50 includes a pair of rails 57 provided above and below the side air outlet 25 and a side shutter plate 51 slidably provided on the pair of rails 57. The inner side of the side wall 26 on the rear side of the side air outlet 25 of the grill 20 serves as a storage portion for the side shutter plate 51, and the side shutter plate 51 is guided by the rail 57 so as to protrude from the storage portion. Has been.

[Side shutter plate]
FIG. 15 is a perspective view of the side shutter plate 51 alone. FIG. 16 is an enlarged perspective view showing the end portion of the side shutter plate 51 in an enlarged manner. The side shutter plate 51 has a substantially elongated flat plate shape, and an edge wall is erected on the back surface so as to surround three sides. That is, the edge wall 52 is erected on the back surface of the side edge of the side shutter plate 51 on the front side of the grill 20, and the edge wall 53 is erected on the back surface of the side edges of the side surface shutter plate 51 in the longitudinal direction ( FIG. 16). As shown in FIG. 14, the edge wall 52 facing the side air outlet 25 of the side shutter plate 51 has an inclined surface inclined toward the back side of the apparatus for the purpose of separating the ventilation airflow blown out from the side air outlet 25 from the wall surface of the room. It has become.

[Side shutter position holding structure]
In the edge wall 53 constituting the side surface of the side shutter plate 51, a cut 53a is formed from the base on the back side of the apparatus toward the base front end on the front side of the apparatus. A portion divided by the cut 53a is a spring portion 54 having a predetermined elasticity that is bent as shown by an arrow H in FIG. In addition, a convex portion 54 a that protrudes in a hook shape is provided near the tip of the spring portion 54. The side shutter plate 51 abuts the convex portion 54 a against the bottom surface of the rail 57 with a predetermined pressing force. Thereby, the entire side surface of the side shutter plate 51 does not contact the rail 57 and a large frictional resistance is generated, and conversely, a gap is generated between the side shutter plate 51 and the rail 57 and the resistance is not lost. It is supported from the rail 57 with a predetermined contact resistance. With this structure, the side shutter plate 51 can be stopped at an arbitrary position between the fully open position and the fully closed position.

  FIG. 17 is an enlarged perspective view showing the rail 57 portion of the side shutter of the grill 20 with the front panel 22 removed. FIG. 18 is a partial cross-sectional view taken along the line GG in FIG. 14 showing a state in which the side shutter 50 is fully opened. FIG. 19 is a cross-sectional view showing a state in which the side shutter 50 is fully closed. In the rail 57, a step portion 57a is provided in the middle portion in the sliding direction so as to be higher by one step than the other portion. The position where the convex portion 54a gets over the stepped portion 57a on the rear side of the apparatus is the fully open position of the side shutter 50, and the position where the convex portion 54a gets over the stepped portion 57a on the front side of the apparatus is the side shutter. The length of the stepped portion 57a is adjusted so as to be 50 fully closed positions. With this structure, the side shutter plate 51 is stably held in the fully open position and the fully closed position.

[Airtight structure when the side shutter is fully closed]
An auxiliary wall 56 that protrudes toward the side air outlet 25 is provided at an end of the side shutter plate 51 on the front side of the grill 20 (an end facing the side air outlet 25 of the side shutter plate 51). The auxiliary wall 56 is formed in a thin plate shape with a short height over the entire length of the end side, and has a gentle arc shape with the highest central portion. And the auxiliary wall 56 bites into the polyethylene foam (elastic member) 61 affixed on the back surface of the front panel 22 when the side shutter plate 51 is fully closed (FIG. 14). Thereby, the airtightness is improved at the fully opened position of the side shutter 50. In addition, the member which the auxiliary wall 56 bites in and improves airtightness is not limited to the polyethylene foam 61. For example, a rubber band-shaped seal member may be disposed at a portion where the auxiliary wall 56 abuts.

[Knob structure]
A knob 55 for opening and closing the side shutter plate 51 is provided at the end of the side shutter plate 51 on the front side of the grill 20. The knob 55 is necessary for opening and closing the side shutter 50. However, if the knob 55 is provided at the end of the side shutter plate 51, it is difficult to use because it contacts the front panel 22 during opening and closing operations. The knob 55 is extended so as to straddle the wall of the grill 20 that houses the side shutter plate 51, and the intermediate position is provided with good workability regardless of whether the knob 55 is moved in the opening direction or the closing direction.

  The knob 55 rises from the edge of the side shutter plate 51 by a predetermined height (a height equal to or greater than the wall thickness of the grill storage portion), and then bends at a substantially right angle toward the center of the main surface of the side shutter plate 51. It extends a predetermined length in parallel with the main surface, and its tip is bent in the opposite direction to the main surface so that the operator's finger can be easily applied. It should be noted that the length extended to the center side of the main surface may be an optimum length for performing an operation with good workability regardless of which of the shutter plates is operated during opening and closing. On the other hand, a notch 26a is formed at the opening edge of the outlet of the side wall 26 of the grill 20 that constitutes the storage portion of the side shutter plate 51 (FIG. 12).

  FIG. 20 is a perspective view, partly in section, showing a state in which the knob 55 straddles the outer wall of the grill when the side shutter 50 is fully opened. According to the structure of the knob 55 as described above, when the side shutter 50 is fully opened as shown in FIG. 20, the knob 55 straddles the side wall 26, and the leading edge of the side shutter plate 51 is blown from the side air outlet 25. Since it can be retracted to a position substantially overlapping with the opening edge of the outlet, the opening area of the outlet can be increased, and the ventilation resistance can be reduced. On the other hand, as shown in FIG. 12, when the side shutter 50 is fully closed, the position where the operator's finger is applied is near the center of the shutter plate, even though the knob 55 extends from the front edge of the shutter plate. Since it approaches, it is easy to grasp and the operability is improved.

  As described above, according to the natural air supply unit 100 of the present embodiment, the grill 20 has the air passage shutter 40 that opens and closes the air passage, and the air passage shutter 40 includes the two main shutter plates 42. , 43 are slide shutters that are slid in the direction perpendicular to the air path and stored in an overlapping manner, so that the air area shutter 40 has a large opening area when fully opened, thereby reducing ventilation resistance and improving ventilation efficiency. Can be planned. The number of main shutter plates 42 is not limited to two and may be increased.

  Further, since the two main shutter plates 42 and 43 are slidably supported by a pair of rails 47 and 48 that are provided in the grill 20 so as to face each other with an air passage in between, the cost increases. In addition, a highly airtight shutter can be configured with a simple configuration. That is, by using a slide type shutter, it is possible to obtain a shutter that is more airtight than a shutter of the type that presses the shutter plate mentioned in the above prior art document against the air passage opening.

  Further, the filter 18 is detachable from the air passage, and has a lattice frame 23 that supports the filter 18 in the air passage at a predetermined distance from the air passage shutter 40. Since 23A also serves as a stopper for the main shutter plate 43, it is possible to filter the circulation air through the entire filter 18, diffuse the processing air volume per unit area of the filter 18 and reduce the ventilation resistance. The number of parts can be reduced.

  Furthermore, an operation lever 46 that is connected to the main shutter plate 42 and opens and closes the airway shutter 40 and a plurality of notches 49a that extend in the sliding direction of the main shutter plates 42 and 43 and lock the operation lever 46 are formed. Since the notch plate 49 is provided, the opening area of the air passage shutter 40 can be changed in multiple stages, and the supply air volume of the natural air supply unit 100 can be adjusted in multiple stages.

  Further, since the front side wall 47a of the rail 47 provided at the lower portion of the grill 20 is higher than the rear side wall 47b, the moisture from the mist and wind and rain sucked together with the outside air flows over the front side wall 47a and flows out to the indoor side. This can be prevented.

  Further, the side shutter 50 includes a pair of rails 57 provided facing the side air outlets 25 and a side shutter plate 51 slidably supported by the rails 57, so that the cost increases. Therefore, a highly airtight shutter can be configured with a simple configuration.

  Furthermore, the side air outlet 25 is provided on the front side of the side wall 26 of the grill 20, and the side shutter plate 51 slides so as to protrude and retract from a storage portion provided behind the side air outlet 25. By separating the ventilation airflow from the wall surface, it is possible to prevent the wall surface from being contaminated by the ventilation airflow and to form a highly airtight shutter having high functionality.

  Further, since the side shutter plate 51 has a knob 55 at the end on the side air outlet 25 side, when the shutter is opened, almost the entire side shutter plate 51 can be stored in the storage portion. The opening area of the side air outlet 25 can be enlarged, and thereby the ventilation resistance can be reduced.

  Further, the knob 55 rises from the edge of the side shutter plate 51 and extends to the center side of the main surface of the side shutter plate 51, so that the opening area of the side outlet 25 can be increased as described above. In addition, the operability is improved as if the knob 55 is provided in the middle portion of the main surface of the side shutter plate 51.

  As described above, the natural air supply unit according to the present invention is useful for a natural air supply unit in which an air passage for taking in outside air from the outside to the inside by natural air supply is formed.

10 Pipe guide (cylinder)
11 Suction port 12 Flange part 15, 23 Lattice frame 18 Outside air cleaning filter (filter)
20 Grill (main unit)
20a Rotating shaft 20b Slide slit 22 Front panel 23A Vertical frame 24 Upper air outlet (air outlet)
25 Side outlet (air outlet)
26 Side wall 40 Airway shutter 42, 43 Main shutter plate 42a Connection convex part 42b, 43a, 43b, 43c Projection part 44 Storage part 46 Operation lever 46a Connection concave part 46b Engagement convex part 47 Lower rail 47a Front side wall 47b Rear side Side wall 48 Upper rail 48a Side wall 48c Wall removal part 49 Notch plate 49a Notch
50 Side shutter 51 Side shutter plate 52 Edge wall 53 Edge wall 54 Spring portion 54a Protrusion portion 56 Auxiliary wall 57 Rail 57a Step portion 61 Polyethylene foam 100 Natural air supply unit

Claims (10)

It is a natural air supply unit that performs natural air supply between outdoors and indoors.
A cylindrical body having a suction port that communicates with a natural air supply port that opens on the wall surface on the indoor side and sucks outside air;
A main body that forms a flat box shape and is connected to the indoor side of the cylindrical body to form an air outlet on the side surface, and forms an air passage that guides and guides outside air from the suction port to the air outlet with the cylindrical body;
A filter provided in the air passage for filtering the outside air sucked in, and
The main body has a side shutter that opens and closes the outlet.
The said side shutter is comprised including a pair of rail provided facing the said blower outlet, and the side shutter board supported by the said rail so that sliding was possible. The natural air supply unit characterized by the above-mentioned. The said blower outlet is provided in the front side of the side surface of the said main body, and the said side surface shutter plate slides so that it may protrude / sink from the accommodating part provided in the rear side of the said blower outlet. Natural air supply unit. The natural air supply unit according to claim 1 or 2, wherein the side shutter plate has a knob provided at an end portion on an outlet side. The natural air supply unit according to claim 3, wherein the knob rises from an edge of the side shutter plate and bends and extends toward the center of the main surface of the side shutter plate. 5. The side shutter plate, when in the fully closed state, has an end on the outlet side closely attached to an elastic member provided at an opening edge of the outlet, over the entire length. The natural air supply unit according to one. The main body has an air passage shutter that opens and closes the air passage,
The air path shutter is a slide shutter in which a plurality of main shutter plates are slid and stored in a direction perpendicular to the air path. Natural air supply unit. The natural supply according to claim 6, wherein the plurality of main shutter plates are slidably supported by a pair of rails provided in the main body so as to face each other with the air passage interposed therebetween. Qi unit. The filter is detachable from the air path,
A lattice frame that supports the filter in the air passage at a predetermined distance from the air passage shutter;
The natural air supply unit according to claim 6 or 7, wherein the lattice frame also serves as a stopper of the main shutter plate. An operation lever connected to the main shutter plate to open and close the airway shutter;
The natural air supply according to any one of claims 6 to 8, further comprising a notch plate formed with a plurality of notches extending in a sliding direction of the main shutter plate and locking the operation lever. unit. The pair of rails are provided facing the upper and lower portions of the main shutter plate,
The natural air supply unit according to claim 7, wherein a front side wall of the rail provided in a lower part is higher than a rear side wall.

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