JP2003028095A - Air blowing and agitating device for building and ventilation system for building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air blowing and agitating device capable of reducing a cost and blowing air in wide ranges and a ventilation system for building using the air blowing and agitating device. SOLUTION: This air blowing and agitating device for building comprises a motor and a fan and an annular fan casing disposed around the fan. One or a plurality of volute air passages are formed in the fan casing, and air outlets formed in the volute air passages on the outer periphery of the fan casing are formed aslant so that the air outlets can be arranged continuously approximately all around the periphery of the fan casing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blast stirrer for buildings and a ventilation system for buildings.
The present invention relates to a building blast stirrer including one motor and a fan, and a fan casing arranged around the fan, and a building ventilation system using the building blast stirrer.

[0002]

2. Description of the Related Art A conventional ventilation system for a building, for example, an underfloor or above-ceiling ventilation system, is a ventilation system using a natural ventilation method. The relatively warm air is made to flow into the underfloor or the inside of the ceiling from the ventilation hole of the same way by the same method as the natural ventilation type, and the air under the floor and the inside of the ceiling is drawn from the ventilation hole on the north side by the above ventilation device. It was in the form of forced release to the outside. In the case of this type of ventilation, due to the nature of the fluid, air gathers and flows at the closest point between the south ventilation port and the north ventilation port, forming a flow path and away from it. , Especially in the corners, there is a long period of air stagnation with virtually no air movement. As a result, it becomes damp and causes the base to decay.

[0003] Therefore, the representative of the applicant of the present patent application is to solve the problem of sufficiently and surely ventilating the underfloor or the corners of the ceiling above the roof and removing all the air in the moisture pool. Is the utility model registration No. 25502
In No. 25, we proposed the following underfloor and above-ceiling ventilation systems.

That is, in the above-underfloor and above-ceiling ventilation device, a blower is arranged at an appropriate position inside the outer frame portion of the underfloor or above-ceiling foundation, or both outer frame portions,
A flow path for the air blown out from the blower is formed in multiple directions around the blower by a blower guide and a guide support member supporting the blower guide, and the blower guide and the guide support member underfloor or The feature is that the air can be blown even to the corners of the outer frame of the foundation above the ceiling.

The air blower arranged at the appropriate position sucks in air from below and discharges the air horizontally from the air outlet. The flow path of the air sent from the blower is formed by a blower guide and a guide support member that supports the blower guide, and the flow path is formed so that the air can flow along the rotation direction of the fan. The air guided by the blower guide and the guide support member has an advantage that it can be reliably sent to the corner portion of the outer frame portion of the foundation under the floor or above the ceiling.

The above-mentioned conventional blower device is provided with a fan which is a sirocco fan, a radial fan or a turbo fan driven by a motor, and an annular fan casing which is arranged around the fan. Four to six volute air passages are formed to extend from the inner circumference of the fan casing to the outer circumference thereof and to extend vertically to the outer circumference of the fan casing. In this air blower, the air whose static pressure has been increased by the fan is tangentially discharged from the air discharge port through the volute air passage.

Therefore, in the conventional blower,
The interval of the exhaust air from the exhaust port is separated from 90 degrees to 72 degrees, and it is difficult to blow and stir the air evenly at 360 degrees, and the stagnant air (high humidity air) may not be sufficiently diffused. Further, in the conventional blower, it is necessary to adjust the direction when mounting the main body so that the wind is directed in a desired direction, for example, the four corners where hot air under the floor tends to stagnate.

As one of the methods of blowing the air around the air blower as evenly as possible, a method of providing seven or more volute air passages in the fan casing to reduce the angular interval between the outlets is considered. However, such a blower generally has a diameter of 200 to 40.
Since it is about 0 mm, the passage length of the volute air passage becomes insufficient, the static pressure decreases, and the velocity of the discharged air decreases, so the wind does not reach far, and the stirring range (area)
However, the problem that it becomes narrower occurs.

There is a method of increasing the diameter as another method of installing seven or more volute air passages while keeping the passage length of the volute air passage of the blower sufficiently long. However, this leads to an increase in cost and increases in size, so there is a risk of restrictions on the installation location, which is not a good idea. Similarly, a method of using two or more fans can be considered, but this also leads to an increase in cost and is not a good plan.

[0010]

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide an inexpensive blast stirring device capable of blowing air over a wide range, and a building ventilation system using the blast stirring device. Is.

[0011]

The above problems of the present invention are as follows.
This is achieved by the following configurations (1) to (5) of the present invention. (1) A blower for a building, comprising one motor and a fan, and an annular fan casing arranged around the fan, wherein the fan casing comprises:
One or more volute air passages are formed, and an air discharge port formed on the outer periphery of the fan casing of the volute air passage is formed obliquely, and the air discharge port is continuous over substantially the entire circumference of the fan casing. A blower agitator for buildings, characterized in that (2) The fan is a sirocco fan, an air suction part is provided in an upper part or a lower part of the fan casing, and a width of an air discharge port formed on an outer periphery of the fan casing is close to the air suction part. The blast stirring device for buildings according to (1) above, in which the width of the portion farther than the width of the portion is set larger. (3) The blower / agitator for buildings according to the above (1) or (2), in which the width of the air outlet is gradually increased from the side closer to the air suction portion to the side farther from the air inlet. (4) With the mounting bracket or the support leg attached to the fan casing or the outer case,
The blower stirring apparatus for buildings according to any one of the above (1) to (3), which is installed at a predetermined position in the building. (5) A ventilation fan is provided at the exhaust port of the space in the building so that the air sucked from the ventilation port of the space in the building flows toward the exhaust port, and the air is also stagnation. The air in the area to be
A ventilation system for buildings, wherein the stagnation air is forcibly discharged by agitating and flowing by the blast agitation device according to any one of (4) and guiding the stagnation air toward the ventilation fan.

[0012]

In the blower for a building of the present invention, since the air discharge port formed on the outer periphery of the fan casing of the volute air passage is formed obliquely, the wind speed can be set within a preferable range. The air can be blown in a wider angle (all around the device) than the conventional one while maintaining it, and the retention of air can be prevented in a wide range. Furthermore, as described above, in the conventional air blower, the direction of the body needs to be adjusted so that the wind is directed in the desired direction.However, this device does not require this adjustment, and the installation is extremely difficult. It's easy.

Therefore, if the air blowing and stirring apparatus of the present invention is installed under a high-humidity floor or under the ceiling, the high-humidity air staying in a wider range than in the past can be diffused into a low-humidity air. As a result, especially when installed under the floor, the water content of the house material, especially the wood, can be reduced as a whole, so that the house material can be prevented from decaying, and damage such as termites can be prevented. Further, if installed in the ceiling, it is possible to mitigate the hot and humid thermal environment in summer and prevent dew condensation in winter.

Further, since only one fan and one motor are required as in the conventional case, the cost can be suppressed.
Furthermore, since the overall diameter can be made almost the same as that of the conventional one, the installation place is not limited as in the conventional one. On the other hand, Japanese Patent Laid-Open No. 2001-21190
Japanese Patent Laid-Open Publication No. 2001-21190 discloses a device in which the fan casing lower case is slowly rotated by a reduction gear mechanism and which has substantially the same effect as the blower stirring device of the present invention. In the above device, one more motor is required to operate the reduction gear mechanism, and at least two motors are required. Therefore, there is a cost problem and maintenance of the reduction gear mechanism is also required. There is also the problem that Further, in the device of this publication, due to its structure, when viewed at a predetermined location, the air supply may be intermittent, which may result in inefficient ventilation.
In this device, continuous ventilation is possible and effective ventilation is possible.

The blast agitation apparatus for buildings of the present invention can be used not only for ordinary houses but also for factories and buildings for growing plants and animals, such as greenhouses. For example, when it is used for the ceiling of a greenhouse for growing plants. Since the humidity and temperature in the greenhouse are almost uniform and the crops are uniformly exposed to the wind, the growth is stable.

[0016]

DETAILED DESCRIPTION OF THE INVENTION Referring to the accompanying drawings,
A preferred embodiment of the building blast stirring device of the present invention will be described. FIG. 1 is a vertical cross-sectional view of a ventilation mixer for a building according to an embodiment of the present invention.

The blower agitator F for a building shown in FIG.
It has a blower / agitation device main body 10 (FIG. 2), and the exterior case C is provided on the outside thereof from the viewpoint of ensuring safety and external appearance.
Is preferably provided.

The blower / agitation device main body 10 is provided with a fan 12 which is a sirocco fan, a radial fan or a turbo fan at the center thereof. Among the above fans,
Sirocco fan is especially preferred. The fan 12 has fan blades 12a in its peripheral portion, is fixed to a drive shaft 16 extending below a motor 14 provided above the fan, and is rotationally driven by the drive shaft 16.

A substantially annular fan casing 18 is arranged around the fan 12. The fan casing 18 has a height higher than that of the fan blades 12a.

The fan casing 18 is a horizontal sectional view of FIG. 3 and FIG. 4 (FIG. 3 shows the upper part of the fan casing, FIG.
Is provided with one or a plurality of volute air passages 20, preferably two to eight (six in the illustrated example), as shown in the horizontal sectional view of the lower part of the fan casing. The number of volute air passages installed may be more than the above when the diameter of the fan casing 18 is large. As is apparent from FIGS. 3 and 4, the plurality of volute air passages 20 in the fan casing 18 are angularly arranged at substantially equal intervals in the circumferential direction of the fan casing, and have a shape with respect to the fan blades. However, a volute curve based on fluid dynamics is formed so that the air volume and the wind speed increase.

The volute air passage 20 is provided with an air inlet 22 provided on the inner peripheral side of the fan casing 18.
The air outlet 24 provided on the outer peripheral side is provided. The air outlet 24 provided on the outer peripheral side of the fan casing 18 is vertically long but obliquely formed, as is apparent from FIG. The air outlets 24 are configured to continue substantially over the entire circumference of the fan casing 18. That is, the adjacent air outlet 24
The upper part of one (specifically, the relatively left air outlet) and the other (specifically, the relatively right air outlet)
The lower portions are arranged so as to be overlapped with each other when viewed in a vertical line (plane), or extremely close to each other even if they are not overlapped. As a result, the blower stirring device F of the present application can blow air evenly around the entire circumference of 360 °. Further, since the oblique air exhaust port is adopted, by increasing the height of the fan casing, it is possible to reduce the number of the air exhaust ports while maintaining the effect that the air can be blown over the entire circumference of 360 °. This enables more powerful (high wind speed) ventilation,
The wind can reach farther.

The shape of the air outlet 24 is shown in FIGS.
As can be seen from the above, it is preferable that the upper width X is large and the lower width Y is small. It is preferable that this width is gradually reduced from the top to the bottom. This is because when the fan used is a sirocco fan, the velocity of the wind blown out from the fan blades increases as it goes upwards. As a uniform one, compensation is made so that there is no difference in the reaching distance in the vertical direction. The above width ratio Y / X
The value of depends on the size and performance of the fan,
About 0.6 to 0.9 is preferable.

At the lower part of the fan casing 18, there is provided an air suction portion 26 having a bell mouth for favorably introducing air into the fan 12. The shape and the like of the bell mouth itself may be the same as that of the conventional one, and therefore further description will be omitted.

In the example shown in FIG. 1, the drive shaft 1
6 is shown as a cantilever type, but depending on the size of the motor, the fan casing 18 or the outer case C
A bearing may be provided at the end of which the free end of the drive shaft 16 is pivotally supported.

The outer case C has the functions of improving safety in handling, preventing insects and mice from sneaking into the inside, and further improving the appearance design. It is preferable to include C1, a bottom panel C2 (including a grill C3), and a mounting bracket C4 attached to the top panel C1. Further, it is preferable that the volute air passage 20 is provided with a blowout port guide plate 28 for adjusting the air flow in the vertical direction as shown in FIG. The blowout port guide plate 28 also has a function of improving safety in handling and preventing insects and mice from sneaking inside.

Next, with reference to FIG. 5, a building ventilation system S using the above-described building air blow agitator F will be described as an underfloor ventilation system for a building.

Generally, in the building ventilation system S of the present invention, as shown in FIG. 5, the ventilation port 1 is provided at a desired position on the surrounding wall 101 and the partition wall 102 which form the internal space under the floor.
03 is formed, and the ventilation hole 103 on the south side is mainly used as an intake ventilation hole. An exhaust underfloor ventilation fan 105 provided separately from the blower stirring device F of the present invention is provided at the exhaust port 104 on the north side.
Install. By using the above-mentioned mounting bracket C4, the blower agitator F of the present invention is attached to a large pull or a joist located at an appropriate position inside the outer frame portion of the underfloor foundation near the exhaust underfloor ventilation fan 105. Attach with screws,
The air sucked from the ventilation port 103 provided on the opposite side is made to flow toward the exhaust port 104, and the air stagnant in the four corners is diffused and flowed by the blower stirring device F of the present invention, and the underfloor ventilation fan 105 It is an underfloor forced ventilation system that is configured to guide air toward the air and forcibly exhaust the stagnant air from the exhaust port 104 to promote ventilation under the floor.

In the blower stirring device F of the present invention, three or four support legs (not shown) may be attached to the outer case C and fixed to the base surface or the like by this. In particular, when fixing to the base surface or the like in this way, the blower stirring device F of the present invention may be installed upside down.

According to the present invention, the ventilation stirring apparatus F of the present invention is attached to a joist located in the central portion of the internal space under the floor or at another appropriate position, and an underfloor ventilation fan 105 for exhaust provided separately from the ventilation stirring apparatus is provided. Attached to the exhaust port 104, the air sucked into the ventilation port 103 provided on the opposite side is made to flow toward the exhaust port 104, and the air stagnant at the four corners is diffused and flowed by the blower stirring device F, Since it is a ventilation system that guides the air toward the exhaust underfloor ventilation fan 105 and forcibly exhausts the stagnant air from the exhaust port 104 to promote the ventilation under the floor, the air stagnant at the four corners under the floor is exhausted. Removes moisture under the floor,
It has the effect of preventing the wood from decaying.

Further, since the blower agitator F of the present invention is attached to the joists and the like using the attaching screws and the like by using the bracket C4 and the like, the attachment is easy, and the size and size of the space under the floor can be adjusted. Even in different places, there is an effect that the air blowing and stirring device F can be easily attached to a proper number and place.

The above-mentioned effects can be similarly obtained in the roof of a house, a staircase in a room, a stairwell space, a greenhouse, a barn, etc.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of an example of a building blast stirring device of the present invention.

FIG. 2 is a front view showing an appearance of the building air agitation device shown in FIG.

FIG. 3 is a horizontal sectional view of an upper portion of a fan casing.

FIG. 4 is a horizontal sectional view of a lower portion of the fan casing.

FIG. 5 is a horizontal cross-sectional view of an underfloor space for explaining an underfloor ventilation system that is an example of a building ventilation system according to the present invention.

[Explanation of symbols]

F Blower stirring device for buildings S Building ventilation system 10 Blower stirring device body 12 fans 14 motor 16 drive shaft 18 fan casing 20 volute air passages 22 Air inlet 24 Air outlet 26 Air suction section 28 Blowout port guide plate C exterior case

Claims (5)

[Claims] 1. A blower for a building comprising a motor and a fan, and an annular fan casing arranged around the fan, wherein the fan casing has one or more volute airs. A passage is formed, and an air outlet formed in the outer periphery of the fan casing of the volute air passage is formed obliquely, and the air outlet is continuous over substantially the entire circumference of the fan casing. Blower stirrer for buildings. 2. The fan is a sirocco fan, an air suction portion is provided at an upper portion or a lower portion of the fan casing, and a width of an air discharge port formed on an outer periphery of the fan casing is equal to the air suction portion. The blast stirring device for buildings according to claim 1, wherein the width of the far portion is set to be larger than the width of the near portion. 3. The blower / stirring device for buildings according to claim 1, wherein the width of the air outlet is gradually increased from the side closer to the air suction portion to the side farther from the air suction portion. 4. The blower / agitator for a building according to claim 1, wherein the fan bracket or the support case is attached to the fan casing or the outer case so as to be installed at a predetermined position in the building. . 5. A ventilation fan is provided at an exhaust port of the space in the building, and air sucked from the ventilation port of the space in the building flows toward the exhaust port to ventilate the air.
Claim 1
A ventilation system for a building, wherein the stagnation air is forcibly discharged by stirring and flowing by the blast of the blast agitation device according to any one of 4 to induce the stagnation air toward the ventilation fan.