JP6849991B2 - Air shutoff device at the entrance and exit of the building - Google Patents

Description

The present invention is an air (indoor / outdoor air) blocking device at the entrance / exit of a building, and is mainly used for outdoor (outdoor "outside") when a vehicle (forklift, trolley, etc.) enters / exits the entrance / exit of the building (factory). It is related to reducing the degree of hot air / cold air (hereinafter referred to as cold air in principle) invading the building (indoor "inside") (avoiding replacement of indoor and outdoor air) and avoiding indoor temperature drop (rationalization of air conditioning).

It is required to avoid indoor temperature drop, secure indoor working environment and secure energy saving. As means for that purpose, simple and dynamic means using air are being prototyped and / or implemented in the building as opposed to the conventional physical means such as shutters and opening / closing doors. And there is a market demand that this simple and dynamic means by air, for example, an air curtain, is optimal.

Note that FIG. 11 shows a conventional air curtain method, in which the wind is blown down by a blower equipped with a nozzle, but the curtain film collapses due to the blowing of outside air, and cold air invades indoors. There was a risk of At the same time, there was a risk that the warm air of the inside air would be attracted. Therefore, in the present situation, sufficient blockage is not secured by this method.

A blower is required to implement this air curtain at the entrance (or entrance) of the building. The ability (function or feature) required of this blower is considered to be the wind speed or the wind area (the wall of the wind and the width in the depth direction such as the wife surface of the building). Among these, regarding the wind speed, the reality that the effect has not been improved due to the capacity of the blower and / or the relationship with the vehicle and the person has not been demonstrated, and improvement thereof is desired. On the other hand, regarding the wind area, the current situation is that the installation and arrangement of a plurality of blowers and / or noise and the like have not been sufficiently effective.

Based on the above situation, we will verify the prior art and prior literature. In the situation where multiple blowers are installed, it is required to form a wall (wind area) of the wind that blows down.

As an air curtain that forms a wide wind area (air film) in the depth direction of the entrance / exit (indoor / outdoor direction, ridge direction) with respect to the wind area generated by the blower, which is intended by the present invention, Japanese Patent Application Laid-Open No. There is an "air flow blocking system" described in Japanese Patent Application Laid-Open No. 2016-114255 (referred to as Reference (1)), which generates a first air curtain and a second air curtain, and generates a first air curtain and a second air curtain. It is a structure that forms a windbreak space between and. However, in the present invention, by forming the windbreak space, as a result, the area of the wind area may be widened and the utilization area indoors may be narrowed. In addition, it is conceivable that the outside air accumulated in the windbreak space is mixed into the room (wind flow that is not attractive).

Further, as an air curtain generator in which a plurality of blowers are provided in the width direction of the doorway (direction of the end surface) and the entire width of the doorway is closed, Japanese Patent Application Laid-Open No. 2001-82396 (referred to as Document (2)). There is a description of "blower, blower system, blower method of blower system", and there are multiple blowers (applying propeller impellers with improved aerodynamic and noise characteristics) and / or in the width direction of the structure. The structure is such that the suction ports are lined up and the air with amplified wind pressure and speed is blown from the outlet nozzle. However, there is no wind area (air film) in the depth direction (building direction), and the force is insufficient against the outside air entering from the entrance / exit, leaving a problem in effectiveness.

Japanese Unexamined Patent Publication No. 2016-14255 Japanese Unexamined Patent Publication No. 2001-82396

Although the above-mentioned document (1) has a width of a wind area, as described above, there is a windbreak space, and there is a possibility that the utilization area indoors may be narrowed. In addition, it is conceivable that the outside air accumulated in the windbreak space will be mixed into the room. Therefore, it indirectly becomes an intrusion of outside air.

Further, in the document (2), there is room for improvement in suppressing the attraction of the inside air to the outside (swinging to the outside) while effectively suppressing the outside air invading from the entrance / exit because the wind area is not wide. .. That is, it is not considered to be sufficient to secure the depth width (the width in the indoor / outdoor direction, in other words, the width in the direction perpendicular to the wife's surface) that can confront the outside air entering from the doorway.

Therefore, an object of the present invention is to secure the width of the wind area so that the outside air invading from the entrance / exit can be confronted, and to secure the width of the wind area by arranging the blowers in one or two rows in the direction of the end face. To do, etc. Then, at least a plurality of blowers are arranged in a row to prevent the suction amount of the blowers, that is, the interference related to the suction between the blowers, and to reduce the pressure loss due to the suction. In addition to contributing to the increase in air volume, the inside air required to form the width of the wind area can be secured.

As described above, claims 1 to 8 are provided in order to achieve the object of the present invention.

In the invention of claim 1, a casing having a one-sided opening (100) and the other opening (101), and the one-sided opening (100) of the casing are provided at the entrance and exit of the building which is a factory or a workplace where vehicles enter and exit. In a blower for blocking internal and external air provided with an impeller and a motor and a rectifying fan at the other opening (101).
The motor and impeller are provided in one opening (100) of the casing, and the motor projects outside the casing.
Saw blade-shaped notches (300) and (301) are formed at one end (3a) and / or the other end (3b) above and / or below the rectifying fan.
A bulged portion formed in the rotation direction end of the impeller (5b), and the target rotational direction end of the impeller (5a), sawtooth cuts (50 1) to form a (50 0),
There are multiple blowers,
Multiple blowers are installed in a group while ensuring independent forms.
It is an air shutoff device at the entrance and exit of a building, which is characterized by forming a wind wall from a group of blowers by blowing down wind.

Therefore, claim 1 is that the width of the wind area can be secured and the outside air that invades from the entrance / exit can be confronted, and that the plurality of blowers in a group are at least a group of multiple blowers in a row in the direction of the end face. Yes, for example, it is possible to eliminate the flow of indoor air (inside air) on the wife's surface to the outside, secure the amount of indoor air sucked in by the blower, and / or provide the inside air required to form the width of the wind area. There are features such as being able to secure it. Further, by providing the saw blade-shaped cuts 300 and 301, for example, it is possible to prevent the generation of vortices of the air flowing from the impeller 5 and reduce the noise.

A second aspect of the present invention, the blower of the plurality groups is at least provided in two lines, the downwash air blower multiple groups, an air shut-off device of the doorway of the building that down blow in two rows.

Therefore, claim 2 can surely achieve the feature of claim 1 as well as the feature of ensuring the width of the wind area.

The invention of claim 3 is an air blocking device at the entrance / exit of a building in which a sound absorbing material is attached to the inner peripheral surface of the casing.

Therefore, claim 3 can at least achieve the feature of reducing noise in the casing and the feature of claim 1.

The invention of claim 4 is an air blocking device at an entrance / exit of a building in which an air layer is formed between an inner peripheral surface of a casing and a sound absorbing material.

Therefore, claim 4 can achieve the feature that the noise in the casing can be further reduced as compared with the conventional case and the feature of claim 1.

The invention of claim 5 is an air shutoff device at the entrance / exit of a building in which each of the plurality of blowers secures an independent form and has a gap between the casings of the adjacent blowers.

Therefore, claim 5 can achieve the characteristics of claim 1.

The invention of claim 6 is an air shutoff device for an entrance / exit of a building having a gap of 4 cm to 8 cm.

Therefore, claim 6 can provide the features of claim 1 and the optimum clearance between the blowers for that purpose.

Enlarged sectional view of a part of the blower

An enlarged cross-sectional view of a main part showing a first example of a sound absorbing means (sound absorbing material) provided on the inner peripheral surface of a blower. Another example of the sound absorbing material of FIG. 2-1 is an enlarged cross-sectional view of a main part showing the second example. An enlarged cross-sectional view of a main part showing a third example of a sound absorbing means (combination of a sound absorbing material and a punching metal) provided on the inner peripheral surface of a blower. An enlarged cross-sectional view of a main part showing a fourth example of a sound absorbing means (combination of a sound absorbing material and a net body such as a wire mesh) provided on the inner peripheral surface of a blower. An enlarged cross-sectional view of a main part showing a fifth example of a sound absorbing means (a space is provided by a combination of a sound absorbing material and a casing) provided on the inner peripheral surface of a blower. This is the sixth example of a vortex generation prevention means (noise control means) in which a notch (processing) is provided in a rectifying fan. It has a large and small saw blade shape, (a) is small, and (b) is larger than (a). Show shape This is the seventh example in which a notch is provided in the impeller by other vortex generation prevention means (noise control means), and it is a large and small saw blade shape and shows the shapes of (a) and (b). Top view of FIG. Front view in which blowers are installed (deployed) in a row at the entrance / exit of a building, for example, in a structure such as a wife's face, the same beam, the same support, and other structures. An elevational view in which blowers are similarly installed in a row at the entrance and exit of a building, etc. Side view with blowers in a row at the entrance and exit of the building, etc. A front view showing an example of another usage example in which the air outlet of the blower is swung in the depth direction (advancing / retreating direction of the entrance / exit) in the example of FIG. 4-1. Front view in which blowers are similarly installed (deployed) in two rows at the entrance and exit of the building, etc. A plan view of two rows of blowers at the entrance and exit of a building, etc. Side view with two rows of blowers at the entrance and exit of the building, etc. Schematic diagram showing the relationship between blowers installed in one or two rows on the upper beams of the entrance and exit of a building, etc. Schematic diagram of the state obtained in the experiment showing an example in which the wind from the blower is blown down toward the ground. A scale schematic diagram showing the relationship in which blowers are stacked (deployed) in five stages on entrances and exits of buildings, for example, pillars such as the end face, the same structure, the same support, and other structures. Schematic diagram disclosing the air flow due to the temperature difference inside and outside the building Schematic diagram showing the relationship between the blow-down wind of a row of blowers installed on the upper beam of the entrance and exit of the building and the outside air. It is a schematic diagram showing the relationship between the blow-down wind of the two rows of blowers provided on the upper beam of the entrance and exit of the building and the outside air, and shows the dimensional relationship between the building and the entrance and exit. For reference, the relationship between the dimensions of the blower and the height of a person is shown. Schematic diagram for examining the quality of blockage by a conventional air curtain

Explaining an example of the preferable blower A shown in FIGS. 1 to 3 and the like, the main part of the blower A has a tubular shape of an arbitrary shape and has a one-sided opening 100 (one-sided opening 100 means a suction opening). And the casing 1 having the other opening 101 (the other opening 101 means a blowout opening) in the vertical direction (left-right direction, etc.), and the sound absorbing means 2 (or sound deadening means) to be described later provided on the first inner peripheral surface 102 of the casing 1. It is composed of a rectifying fan 3 provided in the immediate vicinity of the other opening 101 of the casing 1). Further, one opening 100 of the casing 1 is provided with an impeller 5 and a motor 6. Then, the rectifying fan 3 rectifies the wind of the blower A (impeller 5) and forms a linear flow downward or far away.

Preferred examples of the sound absorbing means 2 shown in FIGS. 2-1 to 2-5 will be described. FIG. 2-1 shows the first inner peripheral surface 102 of the blower A (first and second “described later”). Is an enlarged cross-sectional view of a main part showing a first example of the sound absorbing means 2 by the sound absorbing material 200 provided in (1), for example, for preventing vibration of the casing 1 or for controlling sound transmission. It can be useful for thinning the air layer or the sound absorbing means 2. Further, for example, acoustic energy is converted into thermal energy and attenuated, which is useful for reducing noise in the casing 1. That is, in the present invention, since the sound absorbing material 200 has a positional relationship orthogonal to the air and / or the sound propagation direction (referred to as the air propagation direction), the air propagation sound emitted from the casing 1 together with the wind is reduced, and the surroundings are reduced. It can contribute to the reduction of noise (same for other sound absorbing means 2). 2-2 is another example of the sound absorbing material 200 of FIG. 2-1 and is an enlarged cross-sectional view of a main part showing the second example. The convex portion 200c is formed on the second inner peripheral surface 200a of the sound absorbing material 200. And further convert acoustic energy into heat energy and attenuate it, which helps to reduce noise. Further, FIG. 2-3 is an enlarged cross-sectional view of a main part showing a configuration in which a third example of a combination of the sound absorbing material 200 and the punching metal 201 is provided on the first inner peripheral surface 102 of the casing 1. By providing a gap S between the sound absorbing material 200 and the punching metal 201, the reduction of the noise can be further promoted. FIG. 2-4 is an enlarged cross-sectional view of a main part showing a configuration in which a fourth example is provided by combining a sound absorbing material 200 and a net body 202 such as a wire mesh on the first inner peripheral surface 102 of the casing 1. Desirably, by providing the gap S between the sound absorbing material 200 and the net body 202, the reduction of the noise can be further accelerated. As the sound absorbing material 200, materials such as glass wool, rock wool, and felt can also be used. FIG. 2-3 shows a sound absorbing means 2 provided with a sound absorbing material 200 provided on the first inner peripheral surface 102 of the blower A and a punching metal 201 provided inside the sound absorbing material 200. Further, FIG. 2-4 is a sound absorbing means 2 provided with a sound absorbing material 200 provided on the first inner peripheral surface 102 of the blower A and a net body 202 (preferably a welded wire mesh) inside the sound absorbing material 200. In the third and fourth embodiments, the sound absorbing material 200 can be effective in preventing deterioration (which can increase the rigidity of the resin material), preventing peeling, and the like in a resin material such as a sponge. Further, in the fourth example of the net body 202, the knitting of the vertical and horizontal members of the net body 202, the position variation of the vertical and horizontal members of the net body 202 (the vertical relationship in the state where the net body 202 is flat, or the flat surface). It is conceivable that the airborne noise can be reduced and / or the noise can be reduced, or the vibration can be prevented, etc., depending on the hierarchical relationship). Further, although not shown, it is possible to regulate the sound absorbing material 200 and prevent deterioration by pressing the sound absorbing material 200 with a punching metal 201, a net body 202, or the like. FIG. 2-5 shows a side surface direction 104 (diameter direction) of the casing 1 between the first inner peripheral surface 100 of the casing 1 of another blower A2 (the same applies to the blower A and the like) and the outer peripheral surface 200b of the sound absorbing material 200. It is an enlarged sectional view of the main part which shows the structure of the 5th example which formed the air layer 4 (the circumference is closed in principle) toward (the direction orthogonal to). In this fifth example, the acoustic energy and air propagating sound due to the air layer 4 can be reduced. Alternatively, it is considered to be useful for reducing the above-mentioned noise.

Further, the preferred sixth and seventh examples of the other sound absorbing means 2 shown in FIGS. 2-6 (a) to 2-7 (b) will be described with reference to the rectifying fan 3 and the impeller 5. is there. First, in the rectifying fan 3 shown in FIGS. 2-6 (a) and 2-6 (b), one end 3a and / or the other end 3b (referring to one end and the other end in the wind flow direction) is sawn. The structure is provided with blade-shaped notches 300 and 301 to prevent the generation of vortices of air flowing from the impeller 5, for example (the intention is to reduce noise). There are examples of this structure, such as the entire number of the rectifying fan 3 and the appropriate number of the fan 3. The shape of the notch 300, etc. is not limited, and as in the example of (a) and (b), a saw blade-shaped notch 300, etc., which is larger than that of (a), is viewed from the side in the figure. The flat mode shown in (a) (the same surface as the other opening 101 of the casing 1) and the inclined mode shown in (b) are free. Further, with this structure, for example, a straight air flow can be ensured. Then, in the impeller 5 shown in FIGS. 2-7 (a) and 2-7 (b), notches 500 and 501 were provided at the rotated direction end 5a and / or the rotating direction end 5b, and the impeller 5 flowed from the impeller 5. It is considered to be useful for preventing the generation of air vortices (the intention is to reduce noise). In addition, it is considered that this structure reduces air resistance and secures a straight wind flow. Although not shown, the surface of the impeller 5 can be provided with irregularities, an uneven waveform directed toward the axis, or the like, and the same effect as described above can be expected. The cuts 300 and 301 show both, but for example, a structure having only the cut 300 (or the cut 301) (referring to a structure having only one side) is also possible. The structure of only one is the same for the notches 500 and 501. The shapes, sizes, lengths, etc. of the cuts 300 and 301 and the cuts 500 and 501 are not limited.
In FIGS. 4-1 to 4-4, the blower A has an upper beam H2 of the building H (for example, a structure H4 such as a wife surface H3, the same beam H2, the same support, other structures, and other supports. With a gap 8 in the object), for example, 6 units are arranged in a row in the end surface direction X (a group of a plurality of blowers A to An are arranged in a row in the end surface direction X). Further, in FIGS. 5-1 to 5-3, a gap 8 is provided in the upper beam H2 of the building H, and 6 units × 2 rows = 12 units are arranged in two rows, for example, in the direction X of the end surface (plural units in a group). Blowers A to An are arranged in two rows in the depth direction Y). The gap 8 is formed between the blower A and the adjacent blower A1 as shown in FIGS. 4-1 and 5-1 so that the suction air between the blower A and the blower A1 (same structure as the blower A) is provided. The purpose is to prevent them from overlapping, to secure a sufficient suction amount, to reduce collisions of vibration sounds of blowers A and A1, and to avoid an increase in noise. In the example of two rows shown in FIG. 5-1 and the like, a gap 11 is also formed between the two rows (in the depth direction Y). The effect is the same as the above description. In addition, FIG. 4-4 shows another use in which the outlet (outlet opening) of the blower A is alternately swung in the depth direction Y (the lift progress H1-1 and the backward direction H1-2 of the inlet / outlet H1). This is an example, and an example of expansion of the wind areas B and B1 is shown (see other figures). Of course, the swing angle of the blower A and the like and the number of swings of the blower A and the like are not limited. In addition, the swing angle adjustment can be freely controlled depending on the speed (wind speed) / direction of the inside / outside wind, the season, and the like.

Next, to explain the flow of wind, in FIGS. 1 and 6-1 the rotation of the impeller 5 sucks indoor air (heating / cooling air) from one opening 100 (suction opening of casing 1) (FIG. 1 (FIG. 1). B)), the sucked indoor air reaches the air flow path 103 of the casing 1 (FIG. 1 (b)). In order to absorb sound and suppress vibration when wind flows through the air flow path 103, a sound absorbing material 200 and / or a rectifying fan 3 or the like is attached, and a combination of the sound absorbing material 2 and the punching metal 201 (FIG. 2). -3) or a combination of the sound absorbing material 200 and the net 202 (Fig. 2-4) is provided, and the noise increases while reducing the collision of noise from multiple blowers A and the like. (See Fig. 1 c). The wind in the air flow path 103 is blown down toward the ground R at the other opening 101 (from the inlet / outlet H1 of the casing 1) (FIG. 6-1 (d)). Then, the rectifying fan 3 provided in the other opening 101 of the casing 1 rectifies the wind to form a linear flow downward (see FIG. 6-1 and the like) or distantly (see FIG. 7 and the like). ..

As shown in FIGS. 9 and 10, the wind blown down from the entrance / exit H1, that is, the air film B is, for example, a wind of 1 m to 3 m, preferably 1 m to 2 m at the entrance / exit H1 in the depth direction Y. It is as estimated later that it is effective to form the wall of.

Further, in the example shown in FIG. 7, the blower A and the like are stacked in five stages on the entrance / exit H1 of the building H, for example, a pillar such as the end face H3, the same structure H4, the same support, and other structures. This is another example showing the relationship, and the blowers A shown in FIG. 1 are stacked. The wind of the impeller 5 is blown out in the end surface direction X, and a lateral air film B is formed. That is, a wind wall of 1 m to 2 m is formed at the entrance / exit H1. Others are based on the above-mentioned blow-down method.

Claim 1 employs the same blower Q as the blower Q having a large casing described later.

FIG. 8 is a schematic view disclosing the air flow due to the temperature difference between the inside and outside of the building H.

Generally, it is assumed that the shutter is opened to a height in a state of 5 ° C. outdoors, 15 ° C. indoors, and 0 wind force. Then, as shown in the figure, air at 15 ° C. is released to the outside from the upper half, and air at 5 ° C. flows into the lower half. When the wind speed is 0, only the flow due to the difference in specific gravity of air is generated. The difference in specific gravity between air at 5 ° C. and 15 ° C. is about 44 g / m3. In addition, it is considered that the amount of air around the lift is overwhelmingly larger when the forklift (referred to as a lift) passes through. To be precise, such condition setting is also required.

この送風機Ｑの出口の流速は９．１５ｍ／ｓとなる。 The present applicant proposed, as a blower Q1 having a large casing, trade name of the calculation of the flow velocity V ₁ of the outlet of the blower Q from the performance cord original big fan (a fan Q),

The flow velocity at the outlet of the blower Q is 9.15 m / s.

It shows the result of calculating how much the wind speed that the wind blown down from the blower Q can withstand, that is, the wind speed of the blower Q installed 5 m from the ground R.

FIG. 9 is a schematic view showing the relationship between the blow-down wind of a row of blowers Q provided on the upper beam H2 of the entrance / exit H1 of the building H and the outside air, and the conditions are not shown and the wind speed is 6 m / s. Approximately 33 ° to 38.6 °, partly not shown, and 47 ° to 53 ° at a wind speed of 10m / s, so it seems difficult to use one unit. The width of the air film B in the depth direction Y needs to be at least 1 to 2 m even if it is blown out directly below at 45 °.

FIG. 10 is a schematic view showing the relationship between the two rows of blowers Q provided on the upper beam H2 of the entrance / exit H1 of the building H, the blow-down wind of the blower Q1 of the same machine, and the outside air, and the conditions are, for example, in principle. , Without providing a windbreak space (a buffer space between the air film B and the air film B1), the first blower Q is 18.5 based on the vertical downward wind flow as shown in the figure. ° It was found that the second blower Q1 can block the outside air even at a wind speed of 6 to 10 m / s if it is installed at about 35 ° to 40 °. Others are the same as the above example.

In the figure, reference numeral 12 denotes a frame body having a square shape or an annular shape, which is provided on one side of the casing 1 and is attached to the upper beam H2, a structure, or the like.

Each of the above-mentioned structures is a description of a preferred example of the present invention. Therefore, the present invention is not limited to the above-described embodiments, and a structure in which a part of the configuration is changed within the scope of the gist of the invention, a structure capable of achieving the same features and effects, and the like are examples of the present invention. Akebono.

1 Casing 100 One side opening 101 The other side opening 102 First inner peripheral surface 103 Air flow path 104 Side direction 2 Sound absorbing means 200 Sound absorbing material 200a Second inner peripheral surface 200b Outer peripheral surface 200c Convex part 201 Punching metal 202 Net body 3 Rectifying fan 3a One side End 3b Opposite end 300 Notch 301 Notch 4 Air layer 5 Impeller 5a Rotating end 5b Rotating end 500 Notch 501 Notch 6 Motor 8 Gap 11 Gap 12 Frame A Blower A1 Blower B Blower B Wind area)
B1 air film (wind area)
H Building H1 Doorway H2 Upper beam H3 Wife surface H4 Structure Q Blower Q1 Blower R Ground S Gap X Wife surface direction Y Depth direction

Claims (6)

A casing having one opening (100) and the other opening (101), and an impeller and a motor are provided in the one opening (100) of the casing at the entrance and exit of the building which is a factory or a workplace where vehicles enter and exit. In addition, in the blower for blocking the inside and outside air provided with the rectifying fan in the other opening (101),
The motor and the impeller are provided in one opening (100) of the casing, and the motor projects outside the casing.
Saw blade-shaped notches (300) and (301) are formed at one end (3a) and / or the other end (3b) above and / or below the rectifying fan.
A bulged portion formed in the rotation direction end of the impeller (5b), and the target rotational direction end of the impeller (5a), sawtooth cuts (50 1) to form a (50 0) ,
There are a plurality of the blowers,
These multiple blowers are installed in a group while ensuring independent forms.
An air shutoff device at the entrance and exit of a building, characterized in that a wall of the wind is formed by a blown down wind from this group of blowers. The air blocking device at an entrance / exit of a building according to claim 1, wherein the plurality of blowers are provided in at least two rows, and the blown air of the plurality of blowers is blown down in two rows. The air blocking device at the entrance / exit of a building according to claim 1, wherein a sound absorbing material is attached to the inner peripheral surface of the casing. The air blocking device for an entrance / exit of a building according to claim 3, wherein an air layer is formed between the inner peripheral surface of the casing and the sound absorbing material. The air shutoff device for an entrance / exit of a building according to claim 1, wherein each of the plurality of blowers secures an independent form and has a gap between the casings of the adjacent blowers. The air shutoff device for an entrance / exit of a building according to claim 5 , wherein the gap is 4 cm to 8 cm.

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