JP2007113847A - Exhaust device with agitation air blowing function for underfloor space or underpart of roof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an exhaust device with an agitation air blowing function with a simple structure and small electric power consumption, capable of reducing running costs, and reducible in price, without requiring two waterwheel type fans. <P>SOLUTION: The exhaust device with the agitation air blowing function is placed in an underfloor space or an underpart of a roof of a house. It is provided with one motor, one waterwheel type fan rotatively driven by the motor, and an annular fan casing arranged around the fan. An air suction opening is provided in one side center of the fan casing. An exhaust part for exhausting one part of air from the waterwheel type fan from the underfloor space or the underpart of the roof is provided in a portion of a periphery of the casing away from the suction opening. A plurality of air blow out openings blowing out a remaining part of the air from the waterwheel type fan to a periphery to be used for agitation air blowing is provided in a portion of the periphery of the casing near the suction opening. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an exhaust device with a stirring air blowing function under a floor or behind a ceiling.

  Conventional building ventilators, for example, underfloor or ceiling ventilators, compare ventilation from the south side ventilator with a ventilator using natural ventilation, especially the north side ventilator. The warm air is introduced into the floor or the interior of the back of the ceiling in the same manner as natural ventilation, and the air in the floor and the back of the ceiling is forcibly released to the outside from the north vent by the ventilator. The form to be taken was adopted. In the case of this type of ventilation, due to the nature of the fluid, air gathers and flows in the closest place between the south and north vents, forming a flow path, and away from it. Especially in the corner, the air stays for a long time with virtually no air movement. For this reason, moisture accumulates, causing condensation, generation of mold and mites, and decay of the foundation.

  Therefore, the representative of the applicant of the present patent application as a subject to sufficiently and surely ventilate the corner part of the floor or the back of the ceiling, and to be able to eliminate all the air of the moisture pool, In Utility Model Registration No. 2550225, the following underfloor and ceiling ventilators (hereinafter sometimes referred to as blower agitators) were proposed.

  That is, the underfloor and ceiling underfloor stirrer is provided with a blower at an appropriate position inside the outer frame portion of the foundation under the floor or under the ceiling, or both of the outer frame portions, and sent out from the air blower. The air flow path is formed in several directions around the blower device by a blower guide and a guide support member that supports the blower guide. The present invention is characterized in that air can be blown even to a corner portion of the outer frame portion.

  The air blower arranged at the appropriate position sucks air from below and discharges air from the outlet in the horizontal direction. Since the flow path of the air sent out from the blower is formed by the blower guide and the guide support member that supports the blower guide, the flow path is formed so that the air can flow along the rotation direction of the fan. There is an advantage that the air guided by the air blowing guide and the guide support member is surely sent to the corner portion of the outer frame portion of the foundation under the floor or behind the ceiling. The advantages of this registered utility model blower stirrer can be further improved by providing a ventilation fan at the vent.

However, in this case, since both a ventilation fan and a blower agitation device are installed, multiple devices are required to efficiently replace the air in the space under the floor or behind the ceiling. Is expensive.
There is a possibility that this problem can be solved by the dual-use agitated exhaust system under the ceiling and under the floor described in JP-A-11-31433.
However, the agitating and exhausting apparatus for both the ceiling and under the floor described in Japanese Patent Application Laid-Open No. 11-31433 requires two sirocco fans attached to the shafts of both shaft motors. The number of parts and the height of the device increase. If the height of the device increases, there will be constraints on the construction surface in the underfloor space where there is no vertical width.
JP-A-11-31433

  Then, an object of this invention is to provide the exhaust apparatus with a stirring ventilation function which eliminated the trouble of the above conventional stirring exhaust apparatuses.

The above-described problems of the present invention can be achieved by a blower stirring apparatus with an exhaust function of the following configurations (1) to (4) of the present invention.
(1) Provided with one motor, one water turbine type fan that is rotationally driven by the motor, and an annular fan casing disposed around the fan, which is disposed under the floor of the house or behind the ceiling. An air suction port is provided at the center of one side of the casing, and an exhaust part for exhausting a part of the wind from the water turbine fan from the under floor or the ceiling is provided in a portion far from the suction port around the casing, An exhaust device with an agitating and blowing function, characterized in that a plurality of air blowing ports for blowing out the remainder of the wind from the water turbine fan to the surroundings are provided in a portion near the suction port around the casing.
(2) The exhaust section has one outlet, and an exhaust duct is attached to the outlet, and the remaining wind from the water turbine fan is used as an exhaust outlet in the space under the floor and / or the space behind the ceiling. The blast stirrer with exhaust function according to the above (1), which is adapted to guide.
(3) The blast stirrer with an exhaust function according to (1) or (2), wherein the water turbine fan is a sirocco fan.
(4) The exhaust device with a stirring air blowing function according to any one of the above (1) to (3), which is a cat-based housing based on a basic packing method.

In the exhaust device with the stirring air blowing function of the present invention having the above-described configuration, the wind blown by one water turbine fan is divided into two by the casing, and a part of the wind is discharged from under the floor or behind the ceiling and the remaining wind is blown. Since the space is agitated by flowing into the surrounding under-floor space or ceiling space, the exhaust device with a stirring air blowing function of the present invention does not require two water turbine fans and has a simple structure. Thus, the cost can be reduced, the power consumption is low, and the running cost can be reduced. Moreover, since the exhaust device with a stirring air blowing function of the present invention requires only one water turbine type fan, its height can be kept low, and it can be easily installed and installed even in an underfloor space with no vertical width. it can.
In the air blower using a water turbine fan, the wind near the suction port is relatively weak and the wind far from the suction port is relatively strong. Therefore, in the exhaust device with the stirring air blowing function of the present invention, a load such as a duct is applied. By using the wind far from the suction port for exhaust ventilation and using the wind near the suction port for relatively low load stirring air, the wind from the water turbine fan can be sent without being biased to the stirring air. Even a single unit can efficiently perform agitation air and exhaust air.

  Hereinafter, embodiments of an exhaust device with a stirring air blowing function of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a schematic vertical sectional view of a blower stirring apparatus with an exhaust function according to an embodiment of the present invention. This building-exhaust device with agitating and blowing function performs agitating and exhausting air in the space behind the ceiling and / or under the floor of this house.

  The exhaust device F with a stirring air blowing function shown in FIG. 1 has a stirring air blowing device main body 10, and an exterior cover (not shown) is provided outside from the viewpoint of ensuring safety and appearance design. It is desirable that

  The exhaust device main body 10 with a stirring air blowing function includes a single turbine-type fan 12 that is a sirocco fan, a radial fan, or a turbo fan at the center thereof. The fan 12 has fan blades (not shown) at the periphery thereof, is fixed to a drive shaft 16 that extends below a motor 14 provided above the fan 12, and is rotationally driven by the drive shaft 16.

A substantially annular fan casing 18 is disposed around the fan 12. At the center of the lower portion of the fan casing 18, there is provided an air suction portion 20 having a bell mouth (not shown) for introducing air into the fan 12 satisfactorily. Since the shape and the like of the bell mouth itself may be the same as the conventional one, further explanation is omitted.
The fan casing 18 is horizontally divided into a stirring blower 22 formed on the side close to the air suction part 20 (lower side in the drawing) and an exhaust blower 30 formed on the far side (upper side in the drawing). It is divided. Floor area average of recent housing parts in Japan by the data of HLC is 135～145M ^2, side 12m and forth square housing from this data, the maximum thickness that is in the average residential Japan is within 12m The shortest distance from the basic ventilation hole to the center is about 6 m. Therefore, the length of the exhaust duct connected to the exhaust blower 30 may be around 7 m, and a considerable blow load may be applied. Therefore, in the present invention, the exhaust air blowing unit 30 is disposed on the side far from the suction port where the wind is relatively strong so that the balance between the exhaust gas and the stirring air flow can be maintained under such a load. It is preferable that the height b of the exhaust air blowing unit 30 is equal to or higher than the height a of the stirring air blowing unit 22 so that the exhaust is efficiently performed.
As shown in FIG. 2, the agitating and blowing section 22 includes several, preferably 2 to 6 volute air passages 24. The number of volute air passages may be seven or more when the diameter of the fan casing 18 is large. Several volute air passages 24 are arranged at substantially equal intervals in the circumferential direction of the casing portion, and the shape with respect to the fan blades is based on fluid dynamics so that the air volume and the wind speed are increased. A volute curve is formed.

Each volute air passage 24 is connected to an air outlet 28 provided on the outer peripheral side.
On the other hand, as shown in FIG. 3, the exhaust air blower 30 includes a single volute air passage 32 that extends substantially the entire circumference of the water turbine fan 12. The volute air passage 32 has a duct attachment portion 36 attached to an air outlet 34 thereof. As shown in FIG. 4, the duct mounting portion 36 has a height larger than the height of the exhaust air blowing portion 30 and is connected to an exhaust duct having a large diameter and a small resistance (load) to the air blowing. It is preferable to be able to do so.
The exhaust device F with the stirring air blowing function is configured as shown in FIG. 5 by attaching the exhaust duct D to the duct mounting portion 36 of the exhaust air blowing unit 30 of the exhaust device body 10 with the stirring air blowing function. In the exhaust device F with the stirring air blowing function, the exhaust device body 10 with the stirring air blowing function is disposed, for example, in the vicinity of the center in the outer frame portion 40 of the foundation under the floor of the house (usually attached to the large pull or joist), The outlet D1 of the exhaust duct D is installed so as to face (insert) one of the vents 42 provided in the outer frame portion 40. The house where the exhaust device F with the stirring air blowing function is installed may be a house provided with an underfloor ventilation hole based on a conventional method or a cat-based house based on a basic packing method. According to research by Prof. Akihito Ozaki, Kitakyushu University, there is a survey result that the humidity is the highest in the vicinity of the center of the house with the underfloor ventilation hole based on the conventional method and the cat-based house based on the basic packing method. From the viewpoint of the air flow path design, it is difficult to flow air from one end of the building to the other, and it can be said that it is most efficient to exhaust the air from around the center under the floor. Although the conventional method cannot exhaust air from under the floor near the center of the building, the exhaust device with the stirring air blowing function of the present invention can install the main body near the center of the floor and simultaneously perform stirring air blowing. It became possible to inhale air uniformly from around the building while eliminating the stagnation.

It is a model vertical cross section of the exhaust apparatus with a stirring ventilation function by embodiment of this invention. It is a horizontal sectional view of the stirring air blowing part of the exhaust apparatus with the stirring air blowing function shown in FIG. It is a horizontal sectional view of the exhaust ventilation part of the exhaust apparatus with a stirring ventilation function shown in FIG. It is a more detailed vertical sectional view of the exhaust device with a stirring air blowing function shown in FIG. It is a figure which shows an example of the arrangement | positioning state under the floor of the house of the exhaust apparatus with a stirring ventilation function by this invention.

Explanation of symbols

D Exhaust duct D1 Outlet F Exhaust device with agitating and blowing function 10 Exhaust device body with agitating and blowing function 12 Fan 14 Motor 16 Drive shaft 18 Fan casing 20 Air suction unit 22 Stirring and blowing unit 24 Volute air passage 28 Air blowing port 30 Exhaust and blowing air Part 32 Volute air passage 34 Air outlet 36 Duct mounting part 40 Outer frame part of foundation under floor of house 42 Vent

Claims (4)

  A fan is disposed under the floor or behind the ceiling of a house, and includes a motor, a water turbine fan that is rotated by the motor, and an annular fan casing that is arranged around the fan. A suction port is provided, and at a portion far from the suction port around the casing, an exhaust part for exhausting a part of the wind from the water turbine fan from below the floor or the ceiling is provided, and the suction port around the casing An exhaust device with an agitating and blowing function is provided with a plurality of air outlets for blowing the remainder of the wind from the water turbine fan to the surroundings for the purpose of stirring and blowing.   The exhaust section has one outlet, and an exhaust duct is attached to the outlet, so that a part of the wind from the water turbine fan is guided to the exhaust outlet in the underfloor space and / or the space behind the ceiling. The exhaust device with a stirring air blowing function according to claim 1.   The exhaust device with a stirring air blowing function according to claim 1 or 2, wherein the water turbine fan is a sirocco fan. The exhaust device with a stirring air blowing function according to any one of claims 1 to 3, which is also applicable to a cat-based house by a basic packing method.

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