阅读说明：本技术 吹气罩 (Blowing hood ) 是由 天野宽之 西川心太郎 斋藤功 于 2018-08-28 设计创作，主要内容包括：提供一种吹气罩,能够根据用途产生具有各种各样的速度分布的气流。本发明的吹气罩(20)是与吸气罩组合并用于吹吸型换气装置的构件,其是在机柜(1)的内部装设多个单独控制吹出速度的风扇(2)的构件。还能够将机柜(1)单元化使用。(Provided is a blowing cover capable of generating air flows having various velocity distributions according to the use. The air blowing cover (20) is combined with the air suction cover and used for a blowing and suction type ventilation device, and is a component which is provided with a plurality of fans (2) for independently controlling the blowing speed in the cabinet (1). The cabinet (1) can also be unitized.)

1. An air blowing cover for a blowing-sucking type air interchanger is characterized in that,

a plurality of fans for individually controlling the blowing speed are arranged in the cabinet.

2. Blowing hood as claimed in claim 1,

the cabinet provided with the plurality of fans is provided as a unit, includes a plurality of the units, and the units can be combined and engaged with each other.

3. Blowing hood as claimed in claim 2,

the plurality of units are arranged so that the angles of the blowout surfaces with respect to the suction cover are different from each other.

4. Blowing hood as in any of the claims 1 to 3,

the rack is in the anterior segment of fan includes the anterior segment filter screen, and the back end of fan includes honeycomb filter screen, perforation metal sheet and honeycomb filter screen in proper order.

Technical Field

The present invention relates to a blowing cover used in a blowing/sucking type ventilator.

Background

The blow-and-suction type ventilator is a type in which a flat-plate-shaped blowing cover and an air suction cover are arranged to face each other, and a flow of a minute wind speed blown out from the blowing cover is sucked into the air suction cover. The above-described blow-and-suction type ventilation device is installed in a work place where dust is generated by welding or the like, and is installed in a factory, a research room for processing harmful gas, or the like, because dust can be collected without bringing an operator into contact with strong wind.

As a conventional blowing cover, there is a case where a honeycomb filter and a perforated metal plate are disposed on the front surface of a fan to uniformly blow air from the entire blowing surface, as shown in patent document 1. Further, as shown in patent document 2, a single fan may be used to obtain a high-uniformity blowing speed.

However, since the airflow velocity of the air blowing cover configured to blow air at a constant velocity from the entire surface of the air blowing surface is uniform as in patent document 1, the capturing surface velocity cannot be set to the optimum airflow velocity depending on the application.

Further, the air-blowing cover using a single fan as in patent document 2 requires a large-sized fan when a large air volume is required during the air-blowing process, and therefore the installation size of the device becomes large.

Disclosure of Invention

Technical problem to be solved by the invention

The invention aims to provide a blowing hood which can generate airflow with various speed distributions according to application. Further, another object of the present invention is to provide a puffer cover capable of reducing the installation size even in a case where a large air volume is required during the blowout.

Technical scheme for solving technical problem

In order to solve the above technical problems, the present invention provides a blowing cover for a blowing and sucking type ventilator, wherein a plurality of fans for individually controlling a blowing speed are installed inside a cabinet.

In one aspect of the present invention, the cabinet provided with the plurality of fans is provided as one unit, includes a plurality of the units, and the plurality of the units can be combined and engaged with each other.

In another aspect of the present invention, the plurality of units are arranged such that angles of the blowout surfaces with respect to the suction cover are different from each other.

In another aspect of the present invention, the cabinet includes a front filter screen at a front section of the fan, and a honeycomb filter screen, a perforated metal plate, and a honeycomb filter screen at a rear section of the fan in this order.

Effects of the invention

The blowing hood according to the present invention is configured such that a plurality of fans for individually controlling the blowing speed are installed in the cabinet, and therefore, by changing the blowing speed of each fan, it is possible to generate airflows having various speed distributions according to the application. Moreover, each fan is small enough, and therefore, the apparatus can be reduced in size.

Further, the following structure is adopted: the cabinet provided with the plurality of fans is provided as a unit, includes a plurality of the units, and the units can be combined and jointed with each other. Therefore, by changing the combination, it is possible to cope with various installation environments and variations in the blowing size, and it is not necessary to design each time, and therefore, it is possible to provide the air-conditioner at low cost.

The plurality of units are disposed so that the angles of the discharge surfaces with respect to the suction cover are different from each other. That is, when a plurality of units are provided, the blowing surfaces of the plurality of units can be arranged at different angles with respect to the suction cover, and therefore, the direction of the airflow blown out from each unit can be arbitrarily adjusted for each unit. Therefore, an optimum airflow can be formed in accordance with the purpose.

Further, by arranging the cabinet to include the front-stage filter screen at the front stage of the fan and the honeycomb filter screen, the perforated metal plate, and the honeycomb filter screen in this order at the rear stage of the fan, the space in front of and behind the fan can be minimized, and the blown air flow having uniformity and linear traveling property can be obtained at the same time.

Drawings

Fig. 1 is an external view of a blow hood of an embodiment and a blow hood unit constituting the blow hood.

Fig. 2 is a vertical sectional view of the blow hood of the embodiment and a blow hood unit constituting the blow hood.

Fig. 3 is a horizontal cross-sectional view taken along a horizontal plane including the central axis of the fan.

Fig. 4 is a front view showing a blowing surface of a first modification of the embodiment.

Fig. 5 is an explanatory view of a blow cover according to a second modification of the embodiment.

Fig. 6 is an explanatory view of a purge hood according to a third modification of the embodiment.

Fig. 7 is a side view showing the arrangement between the air blowing cover and the air suction cover in embodiment 1.

Fig. 8 is a plan view showing the arrangement of a conventional purge hood.

Detailed Description

Hereinafter, embodiments of the present invention will be described.

Fig. 1 is a diagram of an air blowing cover 20 of the present embodiment and an air blowing cover unit (unit) 21 constituting the air blowing cover 20. In the present embodiment, a single unit 21 shown in fig. 1 is used as the purge hood 20.

The air blowing cover 20 of the present embodiment, i.e., one unit 21, includes the cabinet 1, the fan 2, the front-stage screen 3, the honeycomb screens 4, 7, the perforated metal plates 5, 6, and the control section 19.

As shown in the drawing, the cabinet 1 is a substantially flat rectangular parallelepiped, and has a relatively small dimension in the airflow direction, i.e., a depth dimension, and a large height dimension and a large lateral width dimension orthogonal to the depth dimension.

In addition to the unit 21 used alone as in the present embodiment, a plurality of units 21 can be used in combination according to the application, as described as a modification example hereinafter. Therefore, a coupling means, not shown, is provided on the side surface of the cabinet 1.

Fig. 2 is a vertical sectional view of the air blowing cover 20 and the unit 21 constituting the air blowing cover 20. As shown in fig. 2, the unit 21 is a unit in which a plurality of fans 2 are provided inside the hollow cabinet 1. In the present embodiment, for example, the upper and lower fans 2 are provided in the unit 21. Further, four fans 2, for example, are provided in the horizontal direction. Therefore, a total of eight fans 2, for example, are disposed inside the cabinet 1 of the embodiment shown in fig. 1. The type of the fan 2 is not particularly limited, but an axial flow type propeller fan is preferably used. Since these fans 2 are configured such that the blowing speed is individually controlled by the control unit 19, it is preferable that the rotational speed be controlled by inverter control.

Fig. 3 is a horizontal sectional view of the inside of the cabinet 1 cut off by a horizontal plane including the center axis of the fan 2, which is a sectional view of a portion a-a of fig. 2. Since the fan 2 has a symmetrical shape with respect to the central axis, fig. 3 shows only one side of the central axis of the fan 2. As shown in fig. 3, a front strainer 3 is provided in a front stage F (suction side) of the fan 2. The front section filter screen 3 is positioned on the back of the cabinet 1.

The front strainer 3 can reduce the distance from the back surface of the device to an obstacle such as a wall surface facing the back surface of the device when installed by making the flow of the incoming wind uniform and reducing the airflow distribution on the back surface of the device, that is, on the front stage F side. Therefore, the present invention can be installed even in a place where a large installation space cannot be secured. Further, the front strainer 3 can suppress a failure of the fan 2 due to the suction of foreign matter such as dust. Further, the fan has a guard function of preventing direct contact with the fan 2, and safety can be improved.

As the front screen 3, a HEPA screen having high dust collection efficiency can be used, but in the present embodiment, a screen (japanese patent No.: サランネット) used as a dust-proof screen for an air conditioner is used.

As shown in fig. 3, in the present embodiment, a honeycomb filter 4, a perforated metal plate 5, a perforated metal plate 6, and a honeycomb filter 7 are provided in this order in the rear stage B (discharge side) of the fan 2.

The honeycomb filter 4 provided immediately after the fan 2 is a member for keeping the air flow blown out from the fan 2 straight. In the case of installation in a work place where sparks are generated, such as a welding work place, it is preferable to use a honeycomb mesh made of aluminum, but a honeycomb mesh made of vinyl chloride resin is used as a standard. The honeycomb structure has a hexagonal lattice, and in the present embodiment, a structure having a lattice size of 3mm and a cell wall thickness of 60 μm is used in the case of vinyl chloride resin, and a structure having a lattice size of 3.2mm and a cell wall thickness of 25 μm is used in the case of aluminum. In any case, the thickness is preferably 10mm or more. This is because if the thickness is smaller than the above thickness, the straight traveling property of the air flow is deteriorated.

The first perforated metal plate 5 disposed immediately after the honeycomb filter 4 is a member that enhances the flow straightening effect by applying resistance to the airflow blown out from the fan 1, and in the present embodiment, a structure in which holes having a diameter of 6mm are provided at an angle of 60 degrees at a pitch of 8mm in a zigzag shape with an opening ratio of 51.0% is used.

The second-layer perforated metal plate 6 provided immediately behind the first-layer perforated metal plate 5 further improves the rectifying effect by applying resistance with a structure having a smaller aperture ratio than that of the first-layer perforated metal plate 5. In the present embodiment, a structure in which holes having a diameter of 1mm are provided at a pitch of 2mm in a zigzag shape having an angle of 60 degrees and an aperture ratio of 22.7% is used.

The honeycomb filter 7 provided on the side closest to the rear stage B is a member for keeping the straight traveling property of the blown air flow, and in the present embodiment, the same structure as the honeycomb filter 4 is used.

A side surface 1a of the cabinet 1 on the rear-stage B side of the honeycomb filter 7 is a blowout surface 1a from which the air flow is blown.

The arrangement of the honeycomb filter 4, the perforated metal plate 5, the perforated metal plate 6, and the honeycomb filter 7 described above is an example, and is not limited to the arrangement of the present embodiment as long as uniformity and straight traveling property can be imparted to the air flow blown out from the fan 1.

The controller 19 controls the rotation speed of each of the plurality of fans 2 individually. Thereby, the blowing speeds of the plurality of fans 2 are individually controlled.

Next, the operation of the purge hood 20 will be described.

The air blowing cover 20 of the present embodiment is disposed opposite to an air suction cover not shown and used as an air blowing and sucking type ventilator. When the fan 2 is rotated, air is sucked from the front stage screen 3, but the velocity distribution of the air flow is reduced when passing through the front stage screen 3, and coarse dust is removed.

The air sucked by the fan 2 is sent to the rear section B side of the fan 2. The propeller fan is of an axial flow type, but has a vector of an outer circumferential direction and a rotation direction of the blades, and thus, straight traveling property is maintained by the honeycomb filter 4 disposed immediately behind the fan 2. However, as shown by the airflows F1a and F1b in fig. 3, the velocities of the airflows are different at the central portion and the outer peripheral portion of the fan 2, and therefore, resistance is applied to the airflow by the perforated metal plate 5, thereby achieving uniformization of the airflow velocities (airflow F2). Moreover, the rectifying effect is improved by the perforated metal plate 6. Thus, as shown by the air flow F3, the air flow velocity is sufficiently uniform, but the air flow passing through the holes of the perforated metal plate 6 on a microscopic level is not constant but turbulent. However, by passing through the honeycomb filter 7, as shown by the air flow F4, the turbulent air flow can be made constant in flow direction, and the air flow having straight-line traveling property can be uniformly discharged from the discharge surface 1 a. The air flow having such a straight traveling property reaches a remote place and is sucked to the suction hood.

The unit 21 of the air blowing cover 20 according to the present embodiment is a unit in which a plurality of fans 2 are installed inside the cabinet 1, and the number of rotations of each fan 2 can be adjusted by an inverter. Thus, the rotation speed of each fan 2 can be set so that the speed distribution of the blowing surface 1a of the unit 21 becomes a desired speed distribution. Therefore, the air blow suitable for the dust generation source can be formed.

For example, it is conceivable to set the rotation speed of the fan 2 located therearound higher than the rotation speed of the fan 2 at a position opposed to the dust generation source.

In the above case, the speed of the airflow blown out from the fan 2 located around the dust generation source is set higher than the speed of the airflow blown out from the fan 2 located opposite to the dust generation source. At this time, the dust generated from the dust generation source is mainly moved toward the suction hood, not shown, by the airflow blown out from the fan 2 at a position opposed thereto, but when the airflow comes into contact with the dust generation source, the airflow is locally diffused together with the dust in a direction orthogonal to the flow direction of the airflow. Here, since the speed of the airflow blown out from the fan 2 located in the periphery is higher, the airflow to be diffused including the dust is entrained into the faster peripheral airflow and conveyed to the suction hood. Therefore, the airflow containing the dust is not liable to leak out.

Further, the rotation speeds of the fans 21 in the units 21 may all be the same, and the units 21 may be used in combination with other units 21 having different rotation speeds.

Next, the effect of the above-described blow hood 20 will be described.

The blowing cover 20 is used for a blowing-sucking type ventilator, and is characterized in that a plurality of fans 2 for individually controlling a blowing speed are installed inside the cabinet 1.

According to the above configuration, by changing the blowing speed of each fan 2, it is possible to generate airflows having various speed distributions according to the application. Moreover, each fan 2 is small enough, and therefore, the apparatus size can be reduced.

In addition, the cabinet 1 is provided with a front section filter screen 3 at a front section F of the fan 2, and a honeycomb filter screen 4, a perforated metal plate 5, a perforated metal plate 6, and a honeycomb filter screen 7 in this order at a rear section B of the fan 2.

With the above configuration, the space in front of and behind the fan 2 can be minimized, and the blown air flow having uniformity and straight-line traveling property can be obtained.

(first modification of embodiment)

Next, a first modification of the purge hood described in the above embodiment will be described with reference to fig. 4. Fig. 4 is a front view of the air blowing cover 22 according to the first modification. The air-blowing cover 22 of the present first modification is different from the air-blowing cover 20 of the above-described embodiment in that a plurality of cells 21 are joined in combination.

The air blowing cover 22 of the present modification includes, for example, four cells 21(21A, 21B, 21C, 21D). Here, the unit 21 is formed in a size in which the ratio of the height dimension to the lateral width dimension of the cabinet 1 shown in fig. 1 is an integer ratio, for example, 1:2 in the present modification. Therefore, as shown in fig. 4, for example, when two units 21A and 21B are overlapped and then units 21C and 21D that are rotated by 90 degrees and are disposed in the vertical direction are joined to both side surfaces thereof, the entire outline shape of the blowing hood 22 can be formed in a rectangular shape. The units 21 adjacent to each other are joined to each other by a coupling unit not shown in the drawings described in the above embodiment.

In the air blowing hood 22, a cabinet having a plurality of fans is provided as one unit 21, and includes a plurality of the units 21. The plurality of units 21A, 21B, 21C, and 21D can be combined and joined to each other, and in the present modification, the unit is joined as described above to form the purge hood 22.

According to the above configuration, the blowout area can be enlarged by combining the plurality of cells 21.

Further, since the units 21 can be combined and joined to each other, it is possible to cope with various installation environments and variations in the blowing size by changing the combination of the units 21, and it is not necessary to design each time, and therefore, it is possible to provide the units at low cost.

(second modification of embodiment)

Next, a second modification of the purge hood described in the above embodiment will be described with reference to fig. 5. Fig. 5 is a plan view of the air blowing cover 23, the air suction cover 8 provided to the air blowing cover 23, and the dust generation source 10 according to the second modification. The air blowing cover 23 of the second modification differs from the air blowing cover 20 of the above-described embodiment in that the plurality of cells 21 are provided so that the angles of the air blowing surfaces 1a with respect to the air suction cover differ from each other.

In the present modification, the purge hood 23 includes a unit 21E and a unit 21F. The unit 21E and the unit 21F are joined to each other on one side. The unit 21E and the unit 21F are arranged such that the respective blowing surfaces 1a face the suction hood 8 arranged opposite to the blowing hood 23 and the dust generation source 10 arranged in the vicinity of the suction hood 8, and the blowing surfaces 1a make an obtuse angle with each other. Thereby, the air flows blown out of the units 21E and 21F flow toward the dust generation source 10 and the suction hood 8, respectively.

In the air blowing cover 23 of the above type, the plurality of cells 21 are disposed so that the angles of the blowing surfaces 1a with respect to the suction cover 8 are different from each other.

According to the above-described configuration, when the plurality of units 21 are provided, the blowing surfaces 1a of the plurality of units 21 can be provided at different angles with respect to the suction cover 8, and therefore, the direction of the airflow blown out from each unit 21 can be arbitrarily adjusted for each unit 21. That is, the airflow can be freely controlled, and the optimum airflow volume and the optimum wind direction can be obtained in the capturing surface, so that the optimum airflow can be formed according to the application.

(third modification of embodiment)

Next, a third modification example, which is a further modification example of the air blowing cover 23 shown as the second modification example, will be described with reference to fig. 6. Fig. 6 is a plan view of the blowing hood 24, the suction hood 8 provided to the blowing hood 24, the worker 9, and the dust generation source 10 according to the third modification. The air-blowing cover 24 of the present third modification is different from the air-blowing cover 23 of the above-described second modification in that the plurality of cells 21 are provided separately from each other.

The unit 21E and the unit 21F constituting the blow hood 24 are separated from each other, and respective blow surfaces 1a are respectively provided to face the suction hood 8 disposed opposite to the blow hood 24 and the dust generation source 10 disposed in the vicinity of the suction hood 8. In particular, in the present modification, the unit 21E and the unit 21F are provided so as to sandwich the working position of the operator 9.

According to the above configuration, since the unit 21 can be installed so as to avoid an object such as the operator 9 that becomes an obstacle when the air flow passes through, efficient ventilation can be achieved without disturbance of the air flow.

(examples)

(example 1)

In example 1, as shown in fig. 7, the blow hood 22 of the first modification described with reference to fig. 4 was directed to a dust generation source that generates dust during welding work10 arrangement, 8 is a suction hood oppositely arranged, the size of each unit 21 of the blowing hood 22 is 1200mm × 2400mm, and the air volume of the suction hood is 200m³And/min, setting the distance between the air suction covers of the air blowing cover to be 4 m. By performing inverter control of the fans in the unit 21, and setting the blowing speed of the fan 2A at the outer periphery shown by a pattern in fig. 4 to 1.0m/s and the blowing speed of the fan 2B at the center shown by a white circle to 0.7m/s, it is possible to efficiently collect dust. The reason for this is as follows.

Generally, the larger the blowing speed, the better the ventilation effect of the dust, but according to the new-edition factory ventilation (air conditioning and sanitation institute of the public welfare agency), it is important to prevent the worker from coming into contact with strong wind, and the wind speed is not desired to exceed 1.0 m/s. In the open-type ventilation device, since the worker 9 is located at the center in many cases, the wind speed at the center is set to 0.7 m/s. Further, since a welding failure is caused when strong wind contacts the welded portion, the wind speed of the outer peripheral portion is limited to 1.0 m/s.

As a result, all the fumes generated during the welding operation can be collected without leaking the dust from the region. In addition, the comfort of the operator is not changed, and poor welding is not generated.

(example 2)

In embodiment 2, the air blow cover 24 according to the present invention of the third modification described with reference to fig. 6 is disposed in the work place of the swing grinder where dust is generated.

While the position of the workpiece and the operator may change during the operation of the swing grinder, it is difficult to change the position of the air-blowing cover every time when the size and the mass of the device are large, and the air-blowing cover must be fixed. In the above case, since the worker 9 and the dust generation source 10 (swinging grinder) are linearly arranged as shown in fig. 8 as a conventional example, the flow regulation from the air blowing cover 30 is disturbed by the worker 9, and it is difficult to maintain the flow regulation at the dust generation site.

However, the blow hood of the present embodiment and each modification does not occupy a large installation space and can be easily moved as a unit type, and therefore, the arrangement can be changed every time the work is performed. In the present embodiment, as described with reference to fig. 6, the air blowing covers 24 are arranged at the left and right sides of the dust generation source 10, that is, the swinging grinders, and are disposed at an angle, whereby the dust generation source 10 can be sufficiently ventilated without the worker 9 disturbing the air flow. Moreover, since the wind does not directly contact the operator 9, the operator can also improve the work comfort.

The air blowing cover of the present invention is not limited to the above-described embodiment and the modifications described with reference to the drawings, and other modifications can be conceived within the technical scope thereof.

For example, in the above-described embodiment, two layers of four fans 2 horizontally disposed are disposed in the vertical direction in the cabinet 1, and as a result, a total of eight fans 2 are disposed, but the number and arrangement of the fans 2 are not limited thereto.

Further, in the first modification described above, as a result of arranging the fans 2 in the above-described manner, the ratio of the height dimension to the lateral width dimension of the cabinet 1 is 1:2, and thus the unit 21 is engaged in the manner shown in figure 4. However, it goes without saying that the arrangement and arrangement of the fans 2 in the cabinet 1 may vary the ratio between the height dimension and the lateral width dimension of the cabinet 1, and it is obvious that the arrangement of the units 21 may vary.

In particular, in the first modification described above, the overall outline shape of the purge hood 22 is rectangular, but it goes without saying that the outline shape of the purge hood may be any shape as long as the air flow can be stably supplied to the intake hood.

In the second modification and the third modification, the two units 21 are provided so that the angles of the blowing surfaces 1a with respect to the suction cover are different from each other, but the present invention is not limited to this. For example, it goes without saying that three or more units 21 may be provided so that the angles of the ejection surface 1a with respect to the suction cover are different from each other.

In addition, the configurations described in the above embodiment and each modification can be selected or changed as appropriate without departing from the gist of the present invention.

For example, in the second modification and the third modification, the two units 21 are provided so that the angles of the blowing surfaces 1a with respect to the suction hood are different from each other. Alternatively, the puffer cover may include two puffer covers 22 of the type shown as the first modification, that is, an aggregate in which the plurality of cells 21 are joined to each other, and may be provided such that the angles of the blowout surfaces between the aggregates with respect to the suction cover are different from each other.

(symbol description)

1, a machine cabinet;

1a blowing out of the noodles;

2, a fan;

3, a front section of filter screen;

4, a honeycomb filter screen;

5 punching a metal plate;

6 punching a metal plate;

7, a honeycomb filter screen;

8, an air suction cover;

9 an operator;

10 dust generation source;

19 a control unit;

20. 22, 23, 24 blowing hoods;

21a blow hood unit (unit);

f, front section;

and B, a rear section.