JP4900053B2 - Ventilation equipment - Google Patents

Description

  The present invention relates to a ventilator that is attached to a wall surface or a ceiling surface of a building or the like and takes in air from outside into the room or discharges indoor air to the outside.

  In recent years, along with high airtightness and high thermal insulation of houses, sick houses due to harmful substances such as volatile organic compounds, carbon monoxide and carbon dioxide generated in the room are regarded as problems. Therefore, it is required to install a 24-hour ventilation system that can automatically discharge indoor harmful substances to the outdoors and take in fresh air from the outside to keep the room air normal.

  As the 24-hour ventilation system, for example, an apparatus main body provided with any one of an air supply fan that supplies outside air into the room and an exhaust fan that exhausts indoor air, and an electric motor that drives the fan And an exhaust fan including a grill mounted on the frame portion of the apparatus main body, wherein the grill is detachably mounted on the main body, and a ventilation system provided with a switch for driving the electric motor is provided on the main body. It has been proposed (see Patent Document 1). The grill of the exhaust fan has a plurality of elongated slits formed in a lattice shape for allowing the air sucked by the driving of the fan to pass through and exhausting it backward.

JP 2006-52923 A

  However, in the grill disclosed in Patent Document 1 described above, the surface direction of the flat plate member provided between the adjacent slits is substantially perpendicular to the flow direction of the air to be sucked, so the friction between the flat plate member surface and the air Resistance increases. Thereby, a turbulent flow is generated in the vicinity of the surface of the flat plate member, and there is a problem that air cannot be efficiently sucked.

  Therefore, the present invention solves the above-described problems, and an object thereof is to suppress the occurrence of turbulent flow when passing through the cover member.

Ventilation device according to the present onset Ming, attached in order to solve the above problems, a fan body having a vent for passage of air through the blade and the blade, and a drive motor for rotating the blade, to the fan body a ventilator comprising a cover member which is, the cover member, the air possess an opening for the passage of a cover member body is a curved shape toward the front to the rear, of the cover member body in the opening, the formed in a curved shape so that toward the vent, and a plurality of rectifying plates provided at a predetermined distance, each of said plurality of rectifying plates, the end of the opening towards the central rectifying plate provided in a position opposed to the center portion of the vent of the rectifying plates provided on parts such that said angle between the flow direction and the rectifying plate of the air is reduced Provided inclined toward the outlet port, of the opening formed by the rectifying plate adjacent the opening width of the inlet side of the air to pass through, than the opening width of the outlet side of the air is discharged Is also small .

  Of the openings formed by the adjacent rectifying plates, the opening width on the inlet side through which the air passes may be smaller than the opening width on the outlet side from which the air is discharged.

  Each of the plurality of rectifying plates has a flow direction of the air toward the central rectifying plate provided at a position facing the central portion of the vent among the rectifying plates provided at the end of the opening. The angle formed with the current plate is reduced. Here, the air flow is a flow of air sucked from the front of the cover member through the cover member toward the fan main body when exhausted, and from the fan main body toward the cover member when supplied with air. It means the flow of air that is blown into.

  In the present invention, since the plurality of rectifying plates are provided inclined at a predetermined angle toward the vent, the contact angle between the exhausted or supplied air and the surface of the rectifying plate is reduced. Therefore, the frictional resistance between the surface of the rectifying plate and the exhausted or supplied air is reduced, and the occurrence of turbulent flow on the surface of the rectifying plate (near) is suppressed. Moreover, since it inclines toward the vent hole, the air colliding with the rectifying plate is changed in wind direction along the inclination direction of the rectifying plate, and is guided in the ventilation direction. Further, the front surface of the cover member and the rectifying plate may be curved to facilitate air rectification.

  According to the present invention, it is possible to suppress the generation of turbulent flow, to suppress the loss of air volume, and to improve the efficiency of exhaust or air supply. In addition, by suppressing the generation of turbulent flow, it is possible to suppress noise generated when air collides with the current plate.

[First Embodiment]
Hereinafter, embodiments of the present invention will be described with reference to the drawings. In each drawing used for the following description, the scale of each member is appropriately changed to make each member a recognizable size.

<Ventilator configuration>
FIG. 1 is a perspective view showing a configuration of an exhaust fan 10 according to an embodiment of the present invention. FIG. 2 is a side view showing the configuration of the exhaust fan 10. The exhaust fan 10 is an example of a ventilation device, and as shown in FIGS. 1 and 2, a fan body having blades 16 for discharging indoor air to the outside and a drive motor 18 for driving the blades 16 to rotate. 12 and a front grille 14 detachably attached to the front surface of the fan main body 12. The front grille 14 is an example of a cover member.

  The fan main body 12 includes a main body base 40 in which a suction port (ventilation port) 44 for feeding air sucked through the front grille 14 by the rotational drive of the blades 16 to the rear side, and a suction port 44 of the main body base 40. And a cylindrical cylindrical portion 42 extending rearward of the back surface of the main body base 40. A main body switch 20 for switching on / off of the drive motor 18 is provided on a side surface of the main body base 40. Further, the cross-sectional shapes of the suction port 44 and the cylindrical portion 42 formed in the main body base 40 are formed so as to be at least larger than the outer shape of the blade 16. A discharge port 46 for discharging the air sucked from the suction port 44 of the main body base 40 to a pipe (not shown) provided behind is formed on the side surface on the rear end side of the cylindrical portion 42. The drive motor 18 is attached to the rear end portion of the blade 16 and controls the blade 16 to be rotatable.

  Next, the configuration of the front grille 14 will be described. FIG. 3 is a front view showing a configuration example of the front grille 14. FIG. 4 is a perspective view showing a configuration example of the back surface side of the front grill 14. FIG. 5 is a cross-sectional view showing a configuration example of the front grille 14. 6A is an enlarged view showing a configuration example of the main part S of the front grille 14, and FIG. 6B is a diagram showing a modification of the configuration of the rectifying plate 30.

  As shown in FIGS. 3 and 4, the front grille 14 includes a front grille body 36 provided with an opening 24 for allowing air sucked from the front to pass toward the rear fan body 12, and the front grille body 36. And a plurality of rectifying plates 30 attached to the opening 24 at equal intervals.

  The front grill body 36 is composed of the frame portion 22 having the opening 24 and the side wall portion 26 erected so as to surround the back surface of the frame portion 22, and is formed in a substantially box shape with the rear portion opened as a whole. The The front grill body 36 is made of a resin material such as plastic, for example, and is formed in a substantially square shape in plan view in this example.

  The frame portion 22 is gently curved in an arc shape toward the rear (see FIG. 1), and a flange portion 28 extending outward from the side wall portion 26 is provided on the peripheral edge portion thereof. As a result, the air from the front side is easily sucked and the design is improved. The flange portion 28 is provided over the entire circumference of the frame portion 22 and is used as a knob (handle) when the front grill 14 is attached to and detached from the exhaust fan 10. Conventionally, protrusions such as knobs or latches for removal have been provided at the bottom of the front grille, and when the front grille is mounted on the wall vertically or horizontally as desired, the left and right balance is off There was a problem of damage. On the other hand, in the front grille 14 of the present example, the detachable flange portion 28 is provided over the entire circumference of the frame portion 22, and the four sides are symmetrical. Therefore, even if the mounting direction of the front grille 14 is changed, the balance when the front grille 14 is mounted is good and there is no sense of incongruity.

  Further, a main body switch is provided at the rear end of the side wall portion 26 (a position facing the main body switch 20 attached to the fan main body 12) so that the main body switch 20 does not become an obstacle when the front grill 14 is fitted into the fan main body 12. A cutout portion 34 cut into a 20 shape is formed.

  The rectifying plate 30 suppresses the generation of turbulent flow when air is sucked, and guides the air sucked by the fan main body 12 in the arrangement direction of the fan main body 12. Each of the plurality of rectifying plates 30 has an elongated flat plate shape, and is attached to the edge portion of the opening 24 at equal intervals so that the longitudinal direction of the rectifying plate 30 is parallel to one side 22 a of the frame portion 22. . In this example, 14 rectifying plates 30 are attached, and a flat plate member 32 is attached to the central portion of these rectifying plates 30. Accordingly, the opening 24 of the frame portion 22 becomes a gap between the current plates 30 and 30. Further, although an example in which the rectifying plate 30 is integrally formed with the frame portion 22 is shown, the rectifying plate 30 may be configured by a separate member.

  As shown in FIG. 5, each of the plurality of rectifying plates 30 is provided so as to be inclined toward the direction of the suction port 44 of the fan main body 12 disposed on the rear side. In this example, since the center of the suction port 44 of the fan main body 12 is located at a substantially central portion of the front grille 14 (position facing the suction port 44), as shown in FIG. The angle θ between the surface direction D1 of each of the rectifying plates 307 to 301 and the flow direction D2 of the sucked air is set so as to decrease from the rectifying plate 307 provided toward the rectifying plate 301 provided in the center. Is done.

  In addition, among the openings (gap) 24 formed by the adjacent rectifying plates 30, the opening width on the inlet side where air flows is set to be smaller than the opening width on the outlet side where air is discharged. For example, as shown in FIG. 6A, among the openings 24a between the adjacent rectifying plates 301 and 302, the opening width W1 on the inlet side into which air flows is larger than the opening width W2 on the outlet side from which air is discharged. Is set to be smaller. In this example, the opening width on the inlet side is made smaller than the opening width on the outlet side by gently bending outward from the front end portion to the rear end portion of each rectifying plate 30. For example, the rectifying plate 302 is bent outward from the front end portion 302a toward the rear end portion 302b. By comprising in this way, the air volume discharged | emitted from the exit side of the opening part 24 can be increased according to the rectification effect.

  As shown in FIG. 6B, for example, by increasing the thickness of the rectifying plate 302 from the front end portion 302a of the rectifying plate 302 toward the rear end portion 302b, the rectifying plates 301 and 302 are adjacent to each other. The rectifying effect can be enhanced by setting the opening width W1 on the inlet side of the opening 24a to be smaller than the opening width W2 on the outlet side.

  Here, when a plurality of slits are formed in the front grille as an air ventilation path as in the prior art, the exhaust or air supply fan disposed rearward from the slit (gap) is seen through. This is not a preferable design in terms of the aesthetic appearance of the exhaust fan 10. Therefore, in the present embodiment, for example, as shown in FIG. 6A, when the adjacent rectifying plates 302 and 303 are viewed in plan, the front end portion 302 a of one rectifying plate 302 and the other rectifying plate 303. It is comprised so that the width | variety of the clearance gap W3 with the rear-end part 303b may become narrow (refer FIG. 3). In this example, the gap between the front end portion 302a of the rectifying plate 302 and the rear end portion 303b of the rectifying plate 303 is set to approximately 1 mm. Accordingly, when the user visually recognizes the front grille 14 from substantially the front, the gap (opening 24) serving as an air passage is hardly seen, and the rear fan body 12 (blade 16) is connected to the current plate. It can be hidden by 30 and difficult to see. As described above, the current plate 30 functions as a blindfold member by inclining and aligning the current plate 30 toward the suction port 44 and by setting the gap W3 between the current plates 30 and 30 to be narrow.

  As described above, in the present embodiment, the plurality of rectifying plates 30 are provided to be inclined at a predetermined angle toward the fan body 12, so that the air sucked into the fan body 12 via the front grille 14, The contact angle with the surface of the current plate 30 is reduced. Therefore, the frictional resistance of the sucked air is reduced, and the occurrence of turbulence on the surface (near) of the rectifying plate 30 is suppressed. Further, since the rectifying plate 30 is inclined toward the fan body 12, that is, the rear side of the outdoor side with the indoor side as the front direction, the air that collides with the rectifying plate 30 is inclined in the inclination direction of the rectifying plate 30. The wind direction is changed along the direction of the fan body 12 and guided toward the fan body 12.

  Therefore, according to the present embodiment, the occurrence of turbulent flow can be suppressed and the sucked air can be collected in the direction of the fan main body 12, so that the loss of air volume is suppressed and the efficiency of exhaust or air supply is improved. be able to. Further, by suppressing the generation of turbulent flow, noise generated when air collides with the rectifying plate 30 can also be suppressed.

  Moreover, by making the opening width W1 on the inlet side smaller than the opening width W2 on the outlet side in the opening 24 between the adjacent rectifying plates 30 and 30, the outlet 24 is discharged from the outlet of the opening 24 by a rectifying effect. The air volume can be increased.

  Furthermore, according to the present embodiment, when the user visually recognizes front grill 14 from the front, each of the plurality of rectifying plates 30 is attached to front grill 14 so as to be flat. Being hidden by the current plate 30 makes it difficult to view. Thereby, the design of the front grille 14 can be improved.

<Use example of exhaust fan>
Next, a usage example when the above-described exhaust fan 10 according to the present invention is attached to a building 70 will be described. In the above-described embodiment, the exhaust fan 10 has been described as an example of a ventilation device. However, an air supply fan 80 that takes outside air into the room may be used. The air supply fan 80 has substantially the same configuration as the exhaust fan 10 described above.

  FIG. 7 is a view showing a house structure in which an exhaust fan 10 and an air supply fan 80 that perform 24-hour ventilation are attached to a building 70. As shown in FIG. 7, the building 70 is, for example, a single-family house, and in this example, a two-story house. On the first floor of the building 70, a living room R1, a toilet R2, a washroom R3 and a washroom R4 are provided. The living room R1 and the toilet R2, the toilet R2 and the washroom R3, and the washroom R3 and the washroom R4 are communicated with each other via a gallery 82. An air supply fan 80 is attached to the wall of the living room R1. Moreover, the exhaust fan 10 is attached to each wall of toilet R2, washroom undressing place R3, and washroom R4.

  The fresh air supplied to the living room R1 by the air supply fan 80 is supplied to the toilet R2, the bathroom dressing room R3, and the bathroom R4 through the gallery 82. On the other hand, the dirty air in the living room R1 is exhausted to the outside by the exhaust fan 10 in the washroom R4 through the louver 82. Instead of the gallery 82, adjacent rooms may be communicated with each other by an undercut provided at the lower part of the door.

  On the second floor of the building 70, rooms R5 and R6 and a corridor R7 are provided. The living room R5 and the corridor R7, and the corridor R7 and the living room R6 are communicated with each other through the gallery 82. An air supply fan 80 is attached to each wall of the living room R5 and the living room R6. An exhaust fan 10 is attached to each wall of the living room R6 and the corridor R7.

  The fresh air supplied to the rooms R5 and R6 by the supply fan 80 is supplied to the corridor R7 through the respective gallery 82. On the other hand, the dirty air in the living room R5 is discharged to the outside by the exhaust fan 10 in the corridor R7 through the gallery 82. The dirty air in the living room R6 is discharged to the outside through the louver 82 by the exhaust fan 10 attached to the corridor R7 and the exhaust fan 10 attached to the own room of the living room R6. By increasing the rectification effect by the rectifying plate 30 provided on the front grille 14 of the exhaust fan 10, it is possible to suppress the airflow loss and improve the ventilation effect.

[Second Embodiment]
Hereinafter, a second embodiment of the present invention will be described with reference to the drawings. In the present embodiment, the configuration of the flat plate member 32 of the front grille 14 is different from that of the first embodiment described above. Since the other exhaust fan 10 has the same configuration as that of the first embodiment, common constituent elements are denoted by the same reference numerals, and detailed description thereof is omitted.

  FIG. 8 is a cross-sectional view showing the configuration of the front grille 14 according to one embodiment of the present embodiment. As shown in FIG. 8, instead of the flat plate member 32 described above, a protrusion 90 having a flat front surface and a tapered cross-section that tapers toward the rear is attached to the central portion of the front grill 14. The inclined surface 90 a of the ridge 90 is set to be substantially equal to the inclination angle of the adjacent current plate 30. Thereby, the air sucked in more efficiently can be collected in the direction of the fan body 12, and the loss of the air volume can be suppressed to improve the efficiency of exhaust or air supply.

  It should be noted that the technical scope of the present invention is not limited to the above-described embodiments, and includes those in which various modifications are made to the above-described embodiments without departing from the spirit of the present invention.

  For example, in the above-described embodiment, the exhaust fan 10 has been described as an example of a ventilation device. However, the exhaust fan 10 may be applied to an air supply fan that takes outside air into the room.

  The ventilator of the present invention is suitably applied to a house or the like that performs 24-hour ventilation.

It is a perspective view which shows the structure of the exhaust fan which concerns on one Embodiment of this invention. It is a perspective view which shows the structural example of an exhaust fan. It is a front view which shows the structural example of a front grill. It is a perspective view which shows the structural example of the back surface side of a front grill. It is sectional drawing which shows the structural example of a front grill. It is an enlarged view which shows the structural example of the principal part of a front grill. It is a figure which shows the structural example of the building to which the exhaust fan was attached. It is a perspective view which shows the structure of the exhaust fan which concerns on other embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Exhaust fan, 12 ... Fan main body, 14 ... Front grille, 16 ... Blade, 18 ... Drive motor, 24 ... Opening part, 30 ... Current plate, 32 ... Flat plate member, 70 ... Building, 80 ... Air supply fan, 90 ... Projections

Claims (2)

A ventilator comprising: a fan body having a blade, a vent through which air is passed by the blade; a drive motor that rotationally drives the blade; and a cover member attached to the fan body,
The cover member is
It possesses an opening for passing the air, and the cover member body is a curved shape toward the front to the rear,
The opening of the cover member body, the formed in a curved shape so that toward the vent, and a plurality of rectifying plates provided at a predetermined distance,
Each of the plurality of rectifying plates has a flow direction of the air as it goes to a central rectifying plate provided at a position facing the central portion of the vent among the rectifying plates provided at an end of the opening. And an inclination to be directed toward the vent so that an angle formed between the current plate and the current plate is small ,
The ventilator characterized in that the opening width on the inlet side through which the air passes is smaller than the opening width on the outlet side from which the air is discharged among the openings formed by the adjacent rectifying plates . The ventilator according to claim 1, wherein a flange portion extending outward from the side wall portion is provided on the entire periphery of the peripheral portion of the cover member .

Images