JP3193946B2 - Underfloor ventilation - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an underfloor ventilation device mainly used for underfloor ventilation in a house.

[0002]

2. Description of the Related Art In recent years, there has been a demand for an underfloor ventilator that can perform safe underfloor ventilation with fear of adverse effects on the life of a building due to mold propagation and white spots.

[0003] Conventionally, this type of ventilator is basically constituted by a blower comprising an electric motor and a blade, and exhausts the moist air under the floor to the outside of the room.

[0004] The structure of a conventional underfloor ventilation fan will be described below with reference to FIG. As shown in the figure, a motor 103 and a drive shaft 1 of the motor 103 are provided inside a box-shaped main body 102 having a flange 101 projecting outward.
The blades 105 for blowing, which are fixedly engaged with 04, are stored therein.
The wind direction was set so that the wind would flow toward the flange 101 side of the main body 102. When such an underfloor ventilation fan is installed under the floor 106, the main body 102 is inserted into the through hole 108 provided in the underfloor wall surface 107 of the house so that the wind direction is from the underfloor 106 to the outside 109. Along the floor below the house floor,
The decorative plate 110 for enhancing the design and waterproofness is fixedly fitted to fix the main body 102, and the electric wire 111 is connected to the electric motor 103. However, recently, in order to circulate and dry the inside of the floor more efficiently, three to three
It is customary to attach four underfloor fans. Each is connected, and a ground wire 1 is provided to prevent overcurrent.
12 were provided and grounding was also performed.

[0005] However, such a conventional underfloor ventilation fan requires electric wiring work for driving the electric motor 103 and grounding treatment, respectively, and causes problems in electric handling such as electric leakage or fire at the time of flooding or watering. there were. There is also a problem that a branch or an insect is caught in the rotating blades 105 and causes a failure.

Accordingly, the following device has been proposed as a ventilator that does not use a motor or a blade. Hereinafter, the configuration will be described with reference to FIG.

As shown in the figure, a box-shaped main body 202 having an air passage 201 therein has an outdoor-side open end 203 having a flange 204 projecting outward. A decorative board 206 having a grid 205 is provided so as to enhance the design of the underfloor ventilation device and prevent small animals such as mice and birds from entering. In addition, a cylindrical jet port 21 is provided in the center portion of the underfloor opening end 207 on the outdoor 209 side of the thin box-shaped nozzle 208.
0 are arranged in a horizontal row, and the jet port 210 is installed horizontally toward the outdoor 209 to form an air attracting device 211.
Also, one end of a highly flexible pressure feeding tube 212 is connected to the open side of the nozzle 208 and the other end is connected to a pressurized air supply device (not shown) installed outside the room 209.
Was connected to the

In the above configuration, when the pressurized air 213 pressurized by the pressurized air supply device is carried into the nozzle 208 through the pressurizing tube 212, the pressurized air 213 passes through the ejection port 210 of the nozzle 208 when the pressurized air 213 passes through the nozzle 210. The wind speed is increased and is ejected to the ventilation passage 201 inside the main body 202. At this time, an attracting action occurs around the pressurized air 213 due to the speed difference, and the air around the lower floor opening end 207 of the main body 202, that is, the air below the floor 214 Is sucked into the ventilation passage 201 and is discharged to the outside 209 together with the jetted pressurized air 213 to perform underfloor ventilation.

[0009]

When such a conventional ventilating device is installed under the floor, the air inducing device 2 is installed in a through hole 216 provided on the bottom wall 215 of the house with the floor under the windward.
For example, when the entire air attracting device 211 is flooded due to a large amount of rainfall and the supply of pressurized air is stopped, water is supplied from the ejection port 210 to the nozzle 20.
8 and may accumulate at the lower end of the nozzle 208,
Since the inner product of the nozzle 208 is greatly narrowed, there is a problem that a pressure loss is applied to the pressurized air and consequently the attraction performance is greatly deteriorated. In addition, in order to quickly discharge the water that has entered as described above, a drain hole can be provided at the lower end of the nozzle to obtain a drainage effect. In addition, there is a problem that the pressure of the pressurized air is reduced, and the speed of the pressurized air is reduced, thereby similarly deteriorating the performance.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has as its first object to provide an underfloor ventilation device capable of draining water entering a nozzle at an early stage.

A second object is to further enhance the effect of drainage. A third object is to prevent the effect of drainage from being hindered even when the air induction device is installed upside down.

[0012]

Means for Solving the Problems In order to achieve the first object, the underfloor ventilation fan according to the present invention has a frame-like interior mounted on a ventilation hole formed in a bottom wall of a house. A main body having a ventilation passage formed therein, a decorative grill provided at an outdoor opening of the main body, and a nozzle having a plurality of nozzles arranged side by side in a ventilation passage near an underfloor opening of the main body toward the outdoor side are formed. And a pressurized air supply device that supplies pressurized air to a nozzle of the air suction device via a pressure feeding tube, and at least one of the plurality of ejection ports is provided below the nozzle. constitutes a drainage spout for draining the water accumulated in the nozzle.

Further, in order to achieve the second object,
The second means has a configuration in which a slope descending toward the discharge port is formed on the inner bottom surface of the nozzle.

Further, in order to achieve the third object,
The third means is provided with drain outlets at the lower part and the upper part of the nozzle to provide a drain function even when the nozzle is turned upside down at the time of installation.

[0015]

According to the first aspect of the present invention, when the ventilation device is operated, pressurized air is supplied from the pressurized air supply device into the nozzle when the ventilator is operated, and the discharge port is also provided with another port. In the same manner as above, pressurized air is blown out, and the air under the floor is attracted by the attraction of the air to be discharged outside.

When the operation of the ventilator is stopped, even if water enters the nozzle from the spout due to rainfall or underfloor flooding, the water is drained by the drain spout provided below the nozzle. It will be.

Further, according to the configuration of the second means, even if water is likely to accumulate in the nozzle, the water quickly flows to the drain port due to the inclination of the inner bottom surface of the nozzle and is drained.

According to the configuration of the third means, when the air inducing device is installed on the wall surface under the floor, even if the air inducing device is installed upside down, one drainage outlet is located below the nozzle. It will be located, and it will be drained so that water may not accumulate in a nozzle.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS.

As shown in the drawing, a box-shaped main body 2 having a ventilation passage 1 therein has an outdoor-side open end 3 having a flange 4 protruding outward. A decorative grille 6 provided with a grid 5 is provided to enhance the design of the underfloor ventilation device and prevent small animals such as rats and birds from entering. In addition, a cylindrical ejection port 10 is provided at the center of the underfloor opening 7 at the outdoor 9 side of the thin box-shaped nozzle 8.
Are disposed in the vicinity of the lower part of the nozzle 8 with at least one jet port 10 serving as a drain jet port 11, and the jet port 10 and the drain jet port 11 are installed horizontally toward the outdoor 9 to provide air. An attraction device 12 is formed. In addition, the main body 2 is inserted into the ventilation hole 14 provided in the lower floor wall 13 of the house, and the flange 4 is fixed to the wall surface on the outdoor 9 side, and the decorative grill 6 is matched and fixed from above, so that the air inducing device 12
Is installed, and one end of the highly flexible pressure feeding tube 15 is connected to the open side of the nozzle 8 in communication, and the other end is connected to the pressurized air supply device 16 installed in the outdoor 9 for construction. .

In the above configuration, the pressurized air supply device 16
When the pressurized air 17 pressurized in the step is carried into the nozzle 8 through the pressure feeding tube 15, the pressurized air 17
When the air passes through the outlet 10 of the main body 2, the wind speed is increased and the air is jetted into the ventilation path 1 inside the main body 2.
The air around the underfloor opening 7, that is, the air under the floor 18, is sucked into the ventilation passage 1, and is discharged to the outside 9 together with the jetted pressurized air 17, whereby underfloor ventilation can be performed.

When a house provided with the underfloor ventilation device having such a configuration is hit by underfloor flooding, the pressurized air supply device 1
It is good when the pressurized air 17 is supplied from 6 to the nozzle 8, but when the operation of the pressurized air supply device 16 is stopped, water enters the nozzle 8 and accumulates in the lower part of the nozzle 8. There is. However, since the drainage outlet 11 is provided in the vicinity of the lower part of the nozzle 8, the water flows out therefrom and quickly returns to the state without the previous inundation, so that the induced ventilation under the floor can be performed normally. .

As described above, according to the first embodiment of the present invention,
Since there is no charged portion in the air induction device 12, water accumulated in the nozzle can be drained at an early stage without occurrence of electric leakage or ignition, and deterioration of the performance of the air induction operation can be prevented. it can.

As a different idea, it is conceivable to incline the jet outlet toward the lower side. However, the drainage operation can be surely performed, but the pressurized air jetting direction is also inclined downward, so that the underfloor ventilation is performed. Ventilation efficiency will be greatly reduced.

Next, a second embodiment of the present invention will be described with reference to FIG. As shown in the figure, the nozzle 8A
Then, the nozzle inner bottom surface 19 is formed so as to be inclined so as to descend toward the drain outlet 11A.

In the above configuration, when water enters the nozzle 8A when the pressurized air supply device (not shown) is stopped, the nozzle inner bottom surface 19 is inclined so as to descend toward the drain outlet 11A. As a result, the flow of water becomes smooth and the drainage of water is completed early.

As described above, according to the second embodiment of the present invention,
The drainage of water accumulated in the nozzle 8A can be quickly performed, and a decrease in the air-inducing action can be prevented.

Next, a third embodiment of the present invention will be described with reference to FIG. As shown in the figure, a first drainage outlet 20 is provided below a nozzle 8B provided at the center of the underfloor opening 7B of the main body 2B, and a second drainage outlet 20 is provided above the nozzle 8B. The outlet 21 is provided, and the air inducing device 12B can be turned upside down without any trouble even when it is installed and operated upside down.

The underfloor ventilation device having the above-described structure is connected to the underfloor 18.
In the case of installation in B, a pressure feed tube 15B is piped from a pressurized air supply device (not shown) installed outside 9B through the inside of the floor 18B, and attached to the open side of the nozzle 8B. At this time, when there is an obstacle such as a base on the opening side of the nozzle 8B or when the entire length of the pumping tube 15B is short,
The construction is completed by turning the main body 2B upside down and inserting and installing the main body 2B in the ventilation hole, and connecting the pumping tube 15B.
Then, when water has entered the nozzle 8B, the first drain outlet 2 provided near the lower portion of the nozzle 8B
0 is on the top side, the second drain outlet 21 is inverted on the bottom side, and the second drain outlet 21 is at the bottom of the nozzle 8B. It can be drained without any trouble.

Thus, according to the third embodiment of the present invention,
Even when the main body 2B is turned upside down in relation to the construction, either the first drainage outlet 20 or the second drainage outlet 21 is located below the nozzle 8B, so that it is simple. Water accumulated in the nozzle 8B can be drained.

[0031]

As is clear from the above embodiments, according to the present invention, a frame-shaped main body having a ventilation passage formed in a ventilation hole formed in a lower wall surface of a house, A decorative grill provided in an outdoor opening, an air inducing device provided with a plurality of nozzles arranged in a ventilation path near the underfloor opening of the main body and having a plurality of ejection ports for ejecting air toward the outdoor side, A pressurized air supply device for supplying pressurized air to the nozzle via a pressure feeding tube, wherein at least one of the plurality of ejection ports is provided below the nozzle, and drainage for draining water accumulated in the nozzle is provided. The underfloor ventilator can be provided which can recover the underfloor ventilation function by draining water that has entered the nozzle at an early stage because of the configuration of the spout.

Further, since the slope descending toward the drain outlet is formed on the bottom surface of the nozzle, drainage of water entering the nozzle becomes smoother.

Further, since the drain outlet is provided at the lower part and the upper part of the nozzle, and the drain function is provided even if the nozzle is turned upside down at the time of installation, the main body provided with the air inducing device is turned upside down. The water that has entered the nozzle is easily drained.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an installation state of an air induction device of an underfloor ventilation device according to a first embodiment of the present invention.

FIG. 2 is a perspective sectional view showing an installation state of the underfloor ventilation device of the first embodiment.

FIG. 3 is a perspective view showing a nozzle portion of the underfloor ventilation device of the first embodiment.

FIG. 4 is a sectional view of the nozzle according to the second embodiment.

FIG. 5 is a perspective view showing a nozzle portion of the underfloor ventilation device according to the third embodiment.

FIG. 6 is a sectional view showing an installation state of a conventional underfloor ventilation fan.

FIG. 7 is a sectional view showing an installation state of another underfloor ventilation device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 ventilation passage 2 main body 2B main body 3 outdoor opening 6 decorative grille 7 underfloor opening 7B underfloor opening 8 nozzle 8A nozzle 8B nozzle 9 outdoor 9B outdoor 10 spout 11 drain spout 11A drain spout 12 air inducing device 13 Underfloor wall surface 15 Pressure feeding tube 16 Pressurized air supply device 17 Pressurized air 19 Bottom surface inside nozzle 20 Drain jet 21 Drain jet

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-6-288400 (JP, A) JP-A-2-110239 (JP, A) Jikken Sho 45-19966 (JP, Y1) (58) Field (Int.Cl. ⁷ , DB name) F24F 7/10 F24F 7/06

Claims (3)

(57) [Claims] 1. A frame-shaped main body having a ventilation passage formed inside a ventilation hole formed in a bottom wall surface of a house, a decorative grill provided at an outdoor opening of the main body, and a floor below the main body. An air inducing device provided with a plurality of nozzles in which a plurality of ejection ports for ejecting air toward the outside of the room are formed in an air passage near an opening, and pressurization for supplying pressurized air to the nozzles of the air inducing device via a pressure feeding tube. and an air supply device, wherein the plurality of providing at least one of the spout to the lower portion of the nozzle, underfloor ventilator constitutes a drainage spout for draining the water accumulated in the nozzle. 2. The underfloor ventilator according to claim 1, wherein a slope descending toward the drain outlet is formed on a bottom surface of the nozzle. 3. The underfloor ventilator according to claim 1, wherein drain outlets are provided at a lower portion and an upper portion of the nozzle to provide a drain function even when the nozzle is turned upside down at the time of installation.