JP2002115883A - Underfloor ventilating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an underfloor ventilating device, improving a ventilating efficiency without bothering any neighborhood. SOLUTION: The underfloor ventilating device is constituted of a ventilating fan unit 5 consisting of a cross flow fan 3, in which a plurality of blades inclined with respect to the direction of a rotary axis are mounted annularly between one side end plate or a partitioning plate and the other side end plate or partitioning plate, and a motor 4 for rotating the cross flow fan 3, a fan casing 2, receiving the fan unit 5 therein, and a whole surface panel 6, covering an underfloor ventilating port b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an underfloor ventilator, and more particularly to an underfloor ventilator improved in the direction of air blown from underfloor discharged from underfloor ventilator.

[0002]

2. Description of the Related Art Conventionally, there has been an underfloor ventilator as disclosed in JP-A-9-152162, JP-A-8-145431 and JP-A-10-1101991. These are known as underfloor ventilation devices using a sirocco fan, a propeller fan, or a cross flow fan as a blower, respectively. FIG. 9 is a perspective view of a conventional underfloor ventilation device using a cross flow fan, and FIG.
11 shows a plan sectional view, and FIG. 11 shows a side sectional view. Underfloor ventilation 1
Reference numeral 01 denotes a blower unit 105 including a cross flow fan 103 and an electric motor 104, a fan casing 102 accommodating the blower unit 105, the fan casing 102 is fixed, and the outdoor opening of the underfloor ventilation hole b is covered. And a front panel 106. Then, the conventional underfloor ventilation device 101 is provided with a foundation concrete wall a on the south side of the building.
The underfloor ventilation holes on the north side of the floor are provided so that the dry air is introduced under the floor from the underfloor ventilation holes b provided on the floor, and the moist air under the floor is discharged from the underfloor ventilation holes b provided on the wall a of the foundation concrete on the north side. b.

However, due to the recent deterioration of housing conditions,
Especially in an urban area, the space between the building and the boundary of the site tends to be narrow. As shown in FIG. 12, when the wall W is installed at the boundary of the site, the air blown out from the underfloor ventilation device 101 May come back after colliding with the wall W, resulting in a decrease in the amount of air blown by the underfloor ventilation device 101. In addition, when no fence is installed, there is a problem that high-humidity air blown out from the underfloor ventilation device 101 enters a building or site of a nearby resident. For this reason,
A method has been considered in which a hood is provided at the outlet and the blowing direction is downward, or a blowing direction changing plate such as a grid (gully) is provided and the blowing direction is horizontal.

[0004]

However, FIG.
As shown in FIG.
In the case where the blowout direction is downward with 0 attached, the blowout wind collides with the ground, resulting in a decrease in airflow. Further, as shown in FIG. 14, the air outlet of the front panel 106 is provided with a wind direction changing plate 120 obliquely to the direction of air flow by the cross flow fan.
Is provided, the straight flowing wind is directed to the wind direction changing plate 1
Since the wind direction is changed by contacting the airflow with the airflow 20, the wind direction change plate 120 has a problem that the airflow resistance is reduced and the air volume is reduced.

On the other hand, since the underfloor is under high humidity, mold and soil bacteria are easily generated on the fan, and when mold and soil bacteria adhere to the fan, there is a problem that the performance of the fan is deteriorated. .

The present invention has been made in consideration of the above circumstances, and has as its object to provide an underfloor ventilation device that improves ventilation efficiency and does not disturb nearby people.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a first aspect of the present invention relates to an underfloor ventilation device having a built-in fan for discharging air under the floor to the outside, wherein the fan has one end plate or a partition plate. A cross flow fan in which a plurality of blades inclined with respect to the rotation axis direction are annularly mounted between the other end plate or the partition plate. The invention according to claim 2 is characterized in that the underfloor ventilator is provided with a cross flow fan having a plurality of wings inclined with respect to the rotation axis direction between one end plate or partition plate and the other end plate or partition plate. A motor that rotates the cross flow fan, a fan casing that houses the cross flow fan and the motor, and is disposed in the underfloor ventilation hole, and an entire panel that covers the outdoor opening of the underfloor ventilation hole. ing. According to a third aspect of the present invention, in the second aspect of the present invention, the longitudinal direction of the cross section of the lattice provided on the front panel is made to coincide with the direction of blowing by the cross flow fan. According to a third aspect of the present invention, in any one of the first to third aspects of the present invention, the crossflow fan is provided with a fungicide coating effective against soil bacteria and black mold.

According to the above-described structure, according to the first and second aspects of the present invention, it is possible to incline the blowing direction of the exhausted air in the underfloor. According to the second aspect of the invention, in addition to the first aspect, the ventilation resistance can be reduced. According to the third aspect of the invention, in addition to the first or second aspect of the invention, it is possible to suppress a decrease in fan performance due to the occurrence of mold, soil bacteria, or the like.

[0009]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a perspective view of the underfloor ventilation device according to the first embodiment of the present invention, FIG. 2 is a plan sectional view, and FIG. 3 is a side sectional view. The underfloor ventilation device 1 is installed so as to cross the underfloor ventilation hole b provided in the foundation concrete a on the north side of the building. The underfloor ventilation device 1 includes a cross flow fan 3 in which a plurality of blades inclined with respect to an axis are annularly mounted between one end plate or partition plate and the other end plate or partition plate, a cross flow fan 3 and a cross flow fan. A blower unit 5 comprising an electric motor 4 for driving the fan unit 3; a fan casing 2 for accommodating the fan unit 5 therein;
And a front panel 6 covering the outdoor opening of the underfloor ventilation hole b.

The fan casing 2 is provided with a suction port 2i for sucking air under the floor on the bottom surface inside the floor, and a blowout port 2e for exhausting the air inside the floor on the side surface on the outdoor side. A flow path 2f is formed between the intake port 2i and the outlet port 2e, and a cross flow fan 3 is provided in the middle of the flow path 2f.

As shown in FIG. 4, a cross-flow fan 3 according to the present invention has a plurality of disk-shaped end plates 31a and 31b arranged at both ends facing each other and at predetermined intervals. Partition plates 32a, 32b, 32c, etc. are provided. The end plate 31a and the partition plate 32a, the partition plate 32a and the partition plate 32
b, etc., a plurality of wings 33a, 33b, 33c, etc. are penetrated and attached, or the end plate 31a and the partition plate 32
a, it is attached for each section such as the partition plate 32a and the partition plate 32b. At this time, the wing 33a attachment position of the end plate 31a is
Since the partition plate 32a is provided with a predetermined angle advanced in the rotation direction from the mounting position of the blade 33a on the partition plate 32a, the blade 33a is mounted obliquely with respect to the rotation axis direction X. Similarly wing 33
b, the wings 33c and the like are also mounted obliquely with respect to the rotation axis direction X. A shaft 34 is attached to the center of the outside of the end plate 31a, and is supported by a bearing 35 provided on the side wall of the fan casing 2. A boss 36 is provided at the center of the outside of the end plate 31b. And connected to the motor 4.

As shown in FIG. 5, the front panel 6 is installed on the outdoor side of the wall a of the building foundation concrete, and covers the outdoor side opening of the underfloor ventilation hole b. Then, the fan casing 2 is attached to the front panel 6 and the underfloor ventilation holes b
Is arranged to cross.

Here, when the cross flow fan 3 is rotated at a predetermined speed clockwise as viewed from the right side, the blown air advances the inclination of the blades 33a, 33b, 33c and the like as shown by the arrow V in FIG. Attempts to flow at an angle in the opposite direction. Therefore, the air under the floor sucked into the fan casing 2 from the suction port 2i is blown obliquely from the blowing port 2e.

With the above configuration, even when the fence W is installed at the boundary of the site, the underfloor air blown out from the underfloor ventilation device 1 will not collide with the fence W and return, and the underfloor ventilation device 1 will not return. Of the ventilation efficiency can be prevented.

Also, as shown in FIG. 6, when the hood 110 is attached to the outdoor side of the front panel 6 and the blowing direction is downward, the blown air does not collide with the ground and return. A decrease in ventilation efficiency can be prevented.

Next, a second embodiment of the underfloor ventilation fan according to the present invention will be described. 1 to 6 are denoted by the same reference numerals, and detailed description thereof will be omitted. FIG. 7 shows a perspective view of the underfloor ventilation device according to the second embodiment of the present invention. FIG. 8 shows a plan sectional view thereof.
The front panel 6 is provided with an opening 61 at a position facing the outlet 2 e provided in the fan casing 2, and a grid 62 is provided in the opening 61 at a predetermined interval and in a direction perpendicular to the ground. Is provided. The lattice 62 is provided such that the longitudinal direction of the cross section thereof is substantially the same as the blowing direction of the cross flow fan.

According to this configuration, when the grid provided on the front panel 6 is provided in a direction perpendicular to the ground, the ventilation resistance is reduced, so that more efficient ventilation can be performed.

In the present invention, a cross flow fan 3 having a plurality of blades which are annularly attached to one end plate or partition plate and the other end plate or partition plate and which are inclined with respect to the direction of the rotation axis is provided in the blower. Although the underfloor ventilation device used has been described, as a countermeasure against the deterioration of the performance of the underfloor ventilation device, the fan may be further provided with a fungicide coating effective against soil bacteria and black mold. As a result, it is possible to prevent the performance of the fan from decreasing due to the adhesion of soil bacteria and mold.

[0019]

As described above, a cross flow fan in which a plurality of blades inclined with respect to the rotation axis direction are annularly mounted between one end plate or partition plate and the other end plate or partition plate of a blower. By using 3, the direction of air blown under the floor is inclined, so even if there is a fence at the boundary of the site, there is no return of the air blown under the floor, thus preventing a decrease in ventilation efficiency. Can be. In addition, since the ventilation resistance is reduced by making the longitudinal direction of the cross section of the grid provided on the front panel substantially parallel to the blowing direction by the cross flow fan 3, more efficient ventilation can be performed. Further, by applying a fungicidal coating effective on soil bacteria and black mold to the cross flow fan 3, it is possible to prevent the performance of the cross flow fan 3 from deteriorating due to adhesion of soil bacteria and mold.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an underfloor ventilation device according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional plan view showing the underfloor ventilation device according to the first embodiment of the present invention.

FIG. 3 is a side sectional view showing the underfloor ventilation device according to the first embodiment of the present invention.

FIG. 4 is a diagram showing a skew fan according to the first embodiment of the present invention.

FIG. 5 is a diagram showing a relationship between an underfloor ventilation device and an underfloor ventilation hole according to the first embodiment of the present invention.

FIG. 6 is a diagram showing a case where a hood is provided in the underfloor ventilation device according to the first embodiment of the present invention.

FIG. 7 is a perspective view showing an underfloor ventilation device according to a second embodiment of the present invention.

FIG. 8 is a plan sectional view showing an underfloor ventilation device according to a second embodiment of the present invention.

FIG. 9 is a perspective view showing a conventional underfloor ventilation device.

FIG. 10 is a plan sectional view showing a conventional underfloor ventilation device.

FIG. 11 is a side sectional view showing a conventional underfloor ventilation device.

FIG. 12 is a diagram showing a case where a fence is provided in front of a conventional underfloor ventilation device.

FIG. 13 is a diagram showing a case where a hood is provided in a conventional underfloor ventilation device.

FIG. 14 is a diagram showing a case where a wind direction changing plate is provided in a conventional underfloor ventilation device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Underfloor ventilation device 2 ... Fan casing 3 ... Cross flow fan 4 ... Electric motor 5 ... Blower part 6 ... Front panel 110 ... Hood a ... Basic concrete b ... Underfloor ventilation hole W ... Fence

Claims (4)

[Claims] An underfloor ventilator having a built-in fan for discharging air under the floor to the outside, wherein the fan is provided between one end plate or partition plate and the other end plate or partition plate with respect to the direction of the rotation axis. An underfloor ventilation system characterized by using a cross flow fan having a plurality of inclined wings mounted in a ring. 2. A cross flow fan in which a plurality of blades inclined with respect to a rotation axis direction are annularly mounted between one end plate or partition plate and the other end plate or partition plate, and the cross flow fan is rotated. It is characterized by comprising an electric motor, a fan casing accommodating the cross flow fan and the electric motor, and arranged in the underfloor ventilation hole, and a front panel covering an outdoor opening of the underfloor ventilation hole. And underfloor ventilation equipment. 3. The underfloor ventilation device according to claim 2, wherein the longitudinal direction of the cross section of the grid provided on the front panel is made coincident with the blowing direction of the cross flow fan. 4. The underfloor ventilation device according to claim 1, wherein the crossflow fan is provided with a fungicide coating effective against soil bacteria and black mold.