JP7386387B2 - Air blower - Google Patents

Description

The present invention relates to a blower device that is installed on the back side of a desk and blows air along the top of the desk.

As this type of blower device, for example, one is known in which a blower outlet is provided in a partition provided on the back side of a desk, and the air conditioned airflow is blown out from the blower outlet of the partition onto the top of the desk. (See Patent Document 1).

Japanese Unexamined Patent Publication No. 7-120006

In conventional air blowing devices, when air is blown from the outlet installed at a low position on the desk top side toward the head of the user using the desk, the blown airflow (blown airflow) A negative pressure area is generated between the top plate and the top plate, and the blowing airflow is attracted to the negative pressure area (an attraction phenomenon due to the Coanda effect). The induced phenomenon due to the Coanda effect increases in proportion to the strength of the airflow from the air outlet, and as a result, the airflow deviates from the set airflow direction (direction of airflow toward the user's head) and blows away from the desk top. The airflow will flow in the direction along the surface. In other words, when blowing air toward the user from the outlet installed on the back side of the desk, if the outlet is located near the top of the desk, it is difficult to blow out in the set direction. There is.

Therefore, the present invention solves the above-mentioned conventional problems, and solves the induced phenomenon due to the Coanda effect caused by the blowing airflow from the outlet when blowing the blowout airflow along the top plate of the desk. It is an object of the present invention to provide a blower device capable of suppressing the generation of air.

In order to achieve this object, a blower device according to the present invention is a blower device that is installed on the back side of a desk and blows air to the top surface of the desk top. The blower device includes an inlet that takes in air, a high-pressure air generation means that converts the air taken in from the inlet into high-pressure air, and blows out the high-pressure air in a blowing direction that is at a predetermined elevation angle with respect to the top surface of the desk. and blowing means for blowing out airflow. The blow-off means is located between two adjacent blow-off ports, together with a plurality of blow-off ports arranged in parallel in a direction along the top surface of the desk top plate, and is configured to blow air from the two adjacent blow-off ports. The structure includes a wall portion between two airflows that form an attraction region where air is attracted from above the desk top toward the negative pressure region on the top of the desk. It is characterized by This achieves the intended purpose.

According to the present invention, there is provided a blower device that is capable of suppressing the occurrence of an induced phenomenon due to the Coanda effect caused by the blowing of the blowing air from the outlet when blowing the blowing air along the top of the desk. can be provided.

FIG. 1 is a perspective view of an air blower according to Embodiment 1 of the present invention. FIG. 2 is a front view of the air blower according to Embodiment 1 of the present invention. FIG. 3 is a sectional view of the air blower according to Embodiment 1 of the present invention. FIG. 4(a) is a diagram showing the attraction region formed between two blowout airflow regions and the flow of the attraction airflow in a cross section horizontal to the top plate of the blower, and FIG. 4(b) 1 is a diagram showing an attraction region formed between two blowout airflow regions and the flow of the attraction airflow in a cross section perpendicular to the top plate of the blower device. FIG. 5(a) is a diagram showing simulation results showing the airflow from the outlet (flow velocity distribution of the outlet) when a wall is provided between adjacent outlets, and FIG. 5(b) is a diagram showing the simulation results. , is a diagram showing a simulation result showing the airflow blown out from the outlet (flow velocity distribution of the blown airflow) in the case where no wall portion is provided.

A blower device according to the present invention is a blower device that is installed on the back side of a desk and blows air to the top surface of the desk top. The blower device includes an inlet that takes in air, a high-pressure air generation means that converts the air taken in from the inlet into high-pressure air, and blows out the high-pressure air in a blowing direction that is at a predetermined elevation angle with respect to the top surface of the desk. and blowing means for blowing out airflow. The blow-off means is located between two adjacent blow-off ports, together with a plurality of blow-off ports arranged in parallel in a direction along the top surface of the desk top plate, and is configured to blow air from the two adjacent blow-off ports. Between the two airflows, a wall portion is provided to form an attraction region where air is attracted from above the desk top toward the negative pressure region on the top surface of the desk.

By doing this, when blowing air from the air outlet provided on the back side of the desk toward the user using the desk, a negative pressure area is generated between the air outlet and the top of the desk. On the other hand, since air flows in through the attraction area formed by the wall, the generation of a negative pressure area can be suppressed compared to conventional blowers. In other words, when blowing airflow along the top of the desk, the blowing device can suppress the occurrence of induced phenomena due to the Coanda effect caused by the blowing airflow from the air outlet. .

In addition, in the air blower according to the present invention, the opening of the air outlet is vertically elongated in the normal direction of the top surface of the desk, and the width of the wall that is the distance between two adjacent air outlets is the width of the air outlet. It is preferable that the width is wider than the opening width. By doing so, it is possible to reliably form an attraction area between two airflows blown from two adjacent air outlets.

Further, in the blower device according to the present invention, it is preferable that the wall portion is provided so that the plurality of air outlets are on the same surface. By doing this, the airflow blown out from the outlet becomes a surface airflow (airflow that spreads over a surface area), and the blower device can blow airflow at a substantially uniform wind speed over a wide area to the user. becomes possible.

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1)
First, with reference to FIGS. 1 and 2, a blower device 10 according to Embodiment 1 of the present invention will be described. FIG. 1 is a perspective view of a blower device 10 according to Embodiment 1 of the present invention. FIG. 2 is a front view of the air blower 10 according to Embodiment 1 of the present invention.

As shown in FIG. 1, the blower device 10 has a configuration in which a blower section 12 is integrally installed on the top surface of a top plate 11a of a counter desk 11. Then, the blower device 10 blows the airflow from the blower unit 12 toward the head of the user (the person to whom the airflow is blown) who uses the counter desk 11 . Note that the blowing section 12 corresponds to the "blowing means" in the claims.

The counter desk 11 includes a top plate 11a on which users work, a front plate 11b located on the front side (user side) of the air blower 10, and a back plate 11c located on the opposite side of the front plate 11b (Fig. 3) and two side plates 11d that connect the front plate 11b and the back plate 11c. The front plate 11b, the back plate 11c, and the side plates 11d constitute a pedestal (leg portion) that supports the top plate 11a. Note that the inside of the counter desk 11 has a hollow structure.

A part of the air blower 12 is formed on the upper surface of the top plate 11a at a position on the back side of the counter desk 11 (on the back plate 11c side) so as to protrude from the upper surface of the top plate 11a.

A plurality of slit-shaped suction ports 15 for taking in air are provided on at least one of the side plates 11d.

The suction port 15 is an opening for taking air into the counter desk 11 from outside. Furthermore, an air purification filter (not shown) may be attached to the suction port 15 to purify the air taken in. By using a known dust collecting filter or a deodorizing filter such as activated carbon as the air purifying filter, the air taken in can be purified air from which dust, pollen, allergens, etc. are removed.

The air blower 12 is provided on the back plate 11c side of the counter desk 11, and is formed to protrude vertically from the top surface of the top plate 11a. In other words, the blowing section 12 is configured to have a side surface 12a (a surface that stands up from the top surface of the top plate 11a) at a protruding portion of the top surface of the top plate 11a. Then, the blowing unit 12 generates airflow (blowout airflow 30 :See Figure 3).

The blower section 12 will be explained in detail.

As shown in FIG. 2, the blower section 12 includes a plurality of air outlets 13 and a wall section 14 located between two adjacent air outlets 13 on a side surface 12a of the air blower section 12. .

The air outlet 13 is an opening for blowing out high-pressure air generated by a high-pressure air generating means 18 (described later) as an airflow 30, and is directed in the vertical direction of the air blower 10 (in the present embodiment, on the top plate 11a of the counter desk 11). It is formed into a slit shape that is vertically elongated in the same direction as the normal direction. Specifically, the air outlet 13 has an opening width W1 corresponding to the short side of the slit, and a height H1 corresponding to the long side of the slit. The plurality of air outlets 13 are arranged in a row along the surface of the top plate 11a of the counter desk 11.

The wall portion 14 is located between two adjacent air outlets 13 . Specifically, the wall portion 14 has a wall width W2 and a height H2, which are the distance between two adjacent air outlets 13. In this embodiment, 17 wall portions 14 are provided for 18 air outlets 13. Note that the height H2 of the wall portion 14 corresponds to the amount of protrusion of the blowing portion 12 from the upper surface of the top plate 11a.

Here, the wall width W2 of the wall portion 14 is wider than the opening width W1 of the air outlet 13, and is set to, for example, about three times the opening width W1. Further, the wall portion 14 is formed so that the plurality of air outlets 13 are on the same surface.

The wall portion 14 has a role of shielding the high pressure air generated by the high pressure air generation means 18 from being blown out as the blowout airflow 30. When the air blower 10 is in operation, the wall portion 14 extends from above the counter desk 11 to the upper surface of the top plate 11a of the counter desk 11 between the two airflows 30 blown out from the two adjacent air outlets 13. An attraction area 22 is formed that attracts air toward a negative pressure area 23 formed in the area. Details will be described later.

Next, with reference to FIG. 3, the internal structure of the air blower 10 will be described. FIG. 3 is a sectional view of the air blower 10 according to the first embodiment of the present invention.

As shown in FIG. 3, the blower device 10 includes a blower fan (centrifugal fan) 16 that generates high-pressure air from the air taken in from the suction port 15 (see FIG. 1), and a blower fan 16 inside the counter desk 11. A high-pressure air generating means 18 comprising a driving motor 17 is provided. The high-pressure air generated by the high-pressure air generating means 18 flows through the ventilation passage 19 and the front air chamber 20 in this order, and is blown out from the blow-off port 13 as a blow-out air flow 30.

The ventilation path 19 is constituted by a duct that communicates between the high-pressure air generation means 18 and the ventilation front chamber 20.

The ventilation front chamber 20 communicates with the ventilation section 12 and supplies the high-pressure air that has passed through the ventilation path 19 to the ventilation section 12 . Here, the ventilation front chamber 20 is a space that can accommodate a fragrance generating device or an air purifying device. For example, when installing a scent generation device in the ventilation front chamber 20, a fragrance is applied to the circulating high-pressure air. It becomes possible to grant.

The plurality of air outlets 13 of the air blowing unit 12 are configured to blow out airflow in a blowing direction having a predetermined elevation angle θ with the upper surface (horizontal plane) of the top plate 11a of the counter desk 11 as a reference. In this embodiment, the predetermined elevation angle θ is a value that is preset so that the blown airflow 30 is blown toward the user's head, and is set to about 30°, for example.

Next, with reference to FIG. 4, the attraction area 22 formed by the wall portion 14 of the air blower 12 will be described. FIG. 4A is a diagram showing the flow of the attraction region 22 and the attraction airflow 31 formed between the two blown airflow regions 21 in a cross section horizontal to the top plate 11a of the blower device 10. On the other hand, FIG. 4(b) is a diagram showing the flow of the attraction region 22 and the attraction airflow 31 formed between the two blowout airflow regions 21 in a cross section perpendicular to the top plate 11a of the blower device 10.

In the blowing section 12, as shown in FIG. 4(a), when the blowout airflow 30 is blown out from the plurality of blowout ports 13, the blowout airflow spreads wider than the opening width W1 (and height H1) of the blowout ports 13. Region 21 is formed. Then, when separated from the air outlet 13 to a certain extent, the air flow areas 21 overlap. That is, when the airflow 30 blown out from the air outlet 13 separates from the blower part 12 (air outlet 13) to a certain extent, it mixes with the air flow 30 blown out from the adjacent air outlet 13 and is blown. Since each of the plurality of air outlets 13 is formed so as to be on the same plane, the air flow 30 blown out from the air outlet becomes a surface air flow (an air flow that spreads over a surface area), and has a substantially uniform wind speed over a wide range. It becomes an air current.

On the other hand, in the vicinity of the blower section 12, a region (attracting region 22) in which adjacent blowout airflow regions 21 do not overlap is formed by a wall portion 14 located between adjacent blower ports 13.

As shown in FIG. 4(b), the attraction region 22 is a region that functions as a flow path passing through the blowout airflow region 21 (the blowout airflow 30 blown out), and is a region between the blowout airflow region 21 and the top plate 11a. When the negative pressure area 23 is generated, the air above the top plate 11a can be caused to flow toward the negative pressure area 23 by the attraction effect. As a result, in the blower device 10, the generation of the negative pressure region 23 that causes the attraction phenomenon due to the Coanda effect is suppressed, and the blowing airflow 30 can be blown out in the blowing direction at a predetermined elevation angle θ with respect to the upper surface of the top plate 11a. can.

Next, simulation results showing the airflow 30 (flow velocity distribution) from the outlet 13 will be shown. FIG. 5A is a diagram showing simulation results showing the blowout airflow 30 (flow velocity distribution of the blowout airflow 30) blown out from the blowout ports 13 in the case where the wall portion 14 is provided between the blowout ports 13 adjacent to each other. On the other hand, FIG. 5(b) is a diagram showing a simulation result showing the blowout airflow 30 from the blowout port 13 (flow velocity distribution of the blowout airflow 30) in the case where the wall portion 14 is not provided.

If the wall portion 14 corresponding to the conventional blower device 10a is not provided, as shown in FIG. 5(b), the top surface of the top plate 11a of the conventional blower device 10a is A blowout airflow 30 is flowing in the direction along the line. On the other hand, when the wall portion 14 corresponding to the air blower 10 is provided, the occurrence of the induced phenomenon due to the Coanda effect is suppressed, and the top plate 11a of the air blower 10 is A blowout airflow 30 is flowing in a direction away from the upper surface (a predetermined elevation angle direction).

From the above, in the blower device 10, the air flows into the negative pressure region 23 through the attraction region 22 formed by the wall portion 14, so compared to the conventional blower device 10a, the Coanda effect is It can be seen that the occurrence of induced phenomena can be suppressed.

As described above, according to the blower device 10 according to the first embodiment, the following effects can be enjoyed.

(1) For an air blowing unit 12 having a plurality of air outlets 13, the area is located between two adjacent air outlets 13, and between two airflows 30 blown out from two adjacent air outlets 13. A wall portion 14 is provided to form an attraction area 22 for attracting air from above the top plate 11a of the counter desk 11 toward the negative pressure area 23 on the top surface of the top plate 11a. By doing this, when blowing air from the air outlet 13 provided on the back plate 11c side of the counter desk 11 toward the users who use the counter desk 11, the air outlet 30 and the top plate 11a are connected to each other. Since air flows into the negative pressure area 23 that occurs between the two sides through the attraction area 22 formed by the wall 14, the generation of the negative pressure area 23 is suppressed compared to conventional blowing devices. be able to. In other words, when blowing the airflow 30 toward the user from the airflow outlet 13 provided on the back plate 11c side of the counter desk 11, an induced phenomenon due to the Coanda effect occurs due to the airflow 30 from the airflow outlet 13. The blower device 10 can suppress the occurrence of.

(2) The opening of the air outlet 13 is vertically elongated in the normal direction of the upper surface of the top plate 11a of the counter desk 11, and the wall width W2 of the wall portion 14, which is the interval between two adjacent air outlets 13, is the air outlet It was formed wider than the opening width W1 of No. 13. By doing so, it is possible to reliably form the attraction region 22 formed between the two airflows 30 blown from the two adjacent air outlets 13.

(3) The wall portion 14 was provided so that the plurality of air outlets 13 were on the same surface. By doing so, the airflow 30 blown out from the air outlet 13 becomes a surface airflow, and the blower device 10 can blow airflow at a substantially uniform wind speed over a wide range to the user.

Although the present invention has been described above based on the embodiments, the present invention is not limited to the above embodiments, and various improvements and modifications can be made without departing from the spirit of the present invention. This can be easily inferred. For example, the numerical values listed in the above embodiment are merely examples, and it is of course possible to employ other numerical values.

In the blower device 10 according to the first embodiment, the counter desk 11 and the blower section 12 are integrally configured, but the present invention is not limited to this. For example, the counter desk 11 and the ventilation section 12 may be configured separately. Thereby, the degree of freedom in designing the blower device 10 can be improved.

The blower device according to the present embodiment is capable of suppressing the occurrence of the induced phenomenon due to the Coanda effect caused by the blowing of the blown airflow when blowing the airflow along the top of the desk. , also useful as a personal blower. Further, it is also applicable to a blower device having a temperature control (cooling, heating) function or a desk with a blower function.

10 Air blower 10a Conventional air blower 11 Counter desk 11a Top plate 11b Front plate 11c Back plate 11d Side plate 12 Air blower 13 Air outlet 14 Wall 15 Inlet 16 Blower fan 17 Motor 18 High pressure air generation means 19 Ventilation path 20 Before air blower Chamber 21 Blowing airflow area 22 Attraction area 23 Negative pressure area 30 Blowing airflow 31 Attraction airflow

Claims (3)

A blower device that is provided on the back side of a desk and blows air to the top surface of the desk top,
A suction port that takes in air,
high-pressure air generation means for converting air taken in from the suction port into high-pressure air;
blowing means blowing out the high-pressure air as a blowout air stream in a direction having a predetermined elevation angle with respect to the top surface of the desk;
Equipped with
The blow-off means is located between two adjacent blow-off ports, together with a plurality of blow-off ports arranged in parallel in a direction along the top surface of the desk top plate, and is arranged between two adjacent blow-off ports. A wall portion is provided between the two blown airflows to form an attraction region where air is attracted from above the desk top toward the negative pressure region on the top of the desk. A blower device characterized by:
The blower device according to claim 1, wherein the height of the wall portion is higher than the height of the air outlet.
The opening of the air outlet is vertically elongated in the normal direction of the top surface of the desk, and the width of the wall that is the distance between two adjacent air outlets is wider than the opening width of the air outlet. The blower device according to claim 1 or 2 , characterized in that:

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