JPH06313599A - Ventilating unit - Google Patents

Abstract

PURPOSE:To effectively ventilate contaminated air in a room by a ventilation unit of a ceiling. CONSTITUTION:The rotary diffusing unit comprises a hollow stationary part 3 fixed to a ceiling S, a hollow rotary head 2 rotatably supported with an exhaust tube 4 inserted to the part 3 as a supporting shaft, a plurality of air supply tubes 5-8 connected at one ends to a periphery of the head and having discharge ports 5b,... directed substantially horizontally in the same rotating direction to the end, and blade wings 5a,... fixed to the tubes 5,... to generate a rising air flow, wherein the head 2 and the tubes 5 are rotated on their axes upon supply of the air from the ports 5b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ventilation unit having an artificial tornado generating mechanism.

[0002]

2. Description of the Related Art For example, as shown in FIG. 8, a ventilation unit 50 is provided on a ceiling portion S of a room as a ventilation system when equipment for generating heat, dust and contaminated air is installed in the room. At the same time, the fan 52 introduces the conditioned air into the room through the air supply duct 54, and at the same time, the exposed duct 51 is extended and connected to the production machine 49, which is a contaminated air source, and exhausted through the exhaust duct 55. It was taken.

Various methods have been proposed for efficiently exhausting locally contaminated air such as oil smoke to the outside of the room.

For example, in Japanese Unexamined Patent Publication No. 2-195139, as shown in FIG. 9, an air injection pipe 57 hanging from the ceiling around a ventilation fan 56 is attached to a range hood.
There is proposed a range hood in which air is sent from 57 ..., A vortex of air is created in the central part thereof, and the suction force of the ventilation fan 56 is enhanced. In addition, JP-A-62-261842 and JP-A-62-261842
In the Japanese Patent Laid-Open No. 62-280529, as shown in FIG. 10, clean air is blown out in a constant rotation direction from the peripheral surfaces of the pipes 58, 58 ... Standing upright to generate a circulating flow in the central portion. By sucking air from the suction port 59 to the central ceiling portion, a slender negative pressure core portion is formed in the central portion in the suction direction, and the centripetal force on the negative pressure core portion and the centrifugal force generated by the circulation flow are generated. There is disclosed a ventilation mechanism that efficiently discharges contaminated air by utilizing the fact that a circulating flow in a balanced range becomes an artificial tornado.

[0005]

However, as described above, when the exposed duct 51 is pulled into the room and directly connected to the pollution source to exhaust the air, the free space in the room is occupied and the appearance of the room is improved. In addition to being impaired, it is fixedly arranged in one place, and after that, various restrictions are imposed such that the indoor space cannot be effectively used.

Further, in the case of the ventilation mechanism using the improved range hood and the artificial tornado, since the post-shaped air injection pipe is always provided around the circulation flow generating portion, the air injection pipe 57 is used. , 58 became obstacles existing in the space, which also impaired the aesthetics of the room and hindered the use of the room.

Therefore, a main object of the present invention is to provide a ventilation unit that can effectively exhaust indoor contaminated air and the like by using the ventilation unit installed on the ceiling part, and contribute to effective use of the indoor space. is there.

[0008]

A ventilation unit for solving the above-mentioned problems includes a hollow fixing portion which serves as a relay portion for supply air and which is fixed to a ceiling portion of a room, and a suction portion to the inside of the hollow fixing portion. An exhaust pipe inserted with its mouth facing, a hollow rotary head that is rotatably supported by using this exhaust pipe as a support shaft and has a space that communicates with the hollow portion of the hollow fixed portion, and an outer surface of the hollow rotary head. On the other hand, one end is connected and at least a plurality of air supply pipes each having a discharge port that is substantially horizontal and directed in the same rotation direction at a position radially separated from the center of rotation are provided, and the air supply from the discharge port is performed. Accordingly, the hollow rotary head and the air supply pipe are configured to rotate on their own axis. In this case, it is desirable to provide vane blades for generating an ascending air current to the air supply pipe.

Further, a hollow fixed head which serves as a relay portion for the supply air and which is fixed to the ceiling of the room, an exhaust pipe which is inserted through the hollow fixed head toward the indoor side, and the hollow fixed head. It may be composed of a plurality of air supply pipes which are connected to the outer surface of and have discharge ports which are substantially horizontal and are oriented in the same rotational direction at positions which are spaced apart at least in a radial direction.

[0010]

In the present invention, preferably, the air is supplied while the ventilation unit main body is rotated by the supply air discharged from the plurality of air supply pipes substantially horizontally and in the same rotation direction, and the exhaust pipe at the center of rotation is used. Intake indoor air. Therefore, a centrifugal force is generated by the swirling flow generated by the blown supply air, and an elongated negative pressure core portion is formed in the central portion in the suction direction by suction from the exhaust port, and centripetal force with respect to the negative pressure core portion is formed. Since the tornado is artificially generated in the range where the centrifugal force generated by the swirling flow is balanced, the contaminated air in the region can be efficiently exhausted.

Further, the swirling flow generated in the horizontal direction and generated by the supply air discharged from the artificial tornado and the air supply pipe causes the air on the lower side of the room to be attracted upward to generate an ascending air current. The blowing action of the blades attached to the air supply pipe forcibly generates an upward flow, so that heat, odor, and the like of the contaminated air generation source in the separated underfloor portion are lifted upward and efficiently discharged. Further, since the blown air is circulated in the room while being mixed with the indoor air, the air in the room can be kept uniform.

As described above, according to the present invention, even if there is a distance from the contaminated air source, the contaminated air or the like is lifted to the ceiling side by the generated upward flow, so that the vacant indoor space is effectively utilized. You will be able to.

[0013]

EXAMPLES The present invention will be described in detail below based on examples.
FIG. 1 is a side view of a rotary ventilation unit 1 according to the present invention, FIG. 2 is an enlarged view of a main part thereof, and FIG. 3 is a plan view thereof. The ventilation unit 1 according to the present invention has a ceiling portion S in the room.
The hollow fixing part 3 fixed to the hollow fixing part 3, the exhaust pipe 4 inserted into the hollow fixing part 3 with its suction port facing the indoor side, and the shaft 12 fixed to the hollow fixing part 3 in the inserted state. A hollow rotary head 2 rotatably supported via ball bearings 13 and one end thereof is connected to a peripheral wall surface of the hollow rotary head 2, and its tip portion is oriented substantially horizontally and in the same rotational direction. A plurality of air supply pipes 5 having a discharge port 5b ,.

As shown in FIG. 2, the hollow fixing portion 3 is a hollow body whose lower end is open, while the hollow rotary head 2 has a portion facing the lower opening of the hollow fixing portion 3. Through holes 2a, 2a are formed in the hollow fixing portion 3 and the hollow portion of the hollow fixed portion 3 communicates with each other, and an air supply port 3a formed in a side portion of the hollow fixed portion 3 is formed.
The supply air introduced from is directly introduced into the hollow rotary head 2. The protruding piece 2b, which is an upper surface portion of the hollow rotary head 2 and is erected around the lower end opening of the hollow fixed portion 3, is for preventing leakage of supply air.

The hollow rotary head 2 is a hollow body which is rotatably supported by ball bearings 13, 13 about a vertical axis around a shaft 12 and is supplied to each of the connected air supply pipes 5 to 10. Separately supply air. The hollow rotary head 2 and the shaft 12 may be fixed to each other, and may be rotatably supported by bearings in the hollow fixed portion 3 into which the shaft 12 is inserted.

A total of six air supply pipes 5 to 10 radially connected from the peripheral surface of the hollow rotary head 2 are provided with discharge ports 5 which are substantially horizontal and oriented in the same rotational direction at their tip portions.
b-10b are formed. The number of the air supply pipes 5, ... May be at least 2 or more, and the number thereof is not particularly limited. Further, although the air supply pipes 5, ... Are bent obliquely in the middle in the illustrated example, they may be straight pipes extending horizontally as they are, or straight pipes extending obliquely downward. Good. In any case, the air supply pipes 5 to 10 are arranged so as to be within a range of several tens of cm from the ceiling surface, specifically, a range of about 100 to 1000 mm from the ceiling surface without extending to the pollution source position inside the room. To be done.

Further, the discharge ports 5b, ... Are not necessarily formed at the tips of the air supply pipes 5, .., and are formed substantially horizontally and in the same rotation direction at a position separated from the center of rotation in plan view. It suffices if it is provided, and it may be formed in the intermediate portion of the air supply pipes 5, ...

Further, in the present invention, the vane blades 5a to 10a are preferably attached to the air supply pipes 5 to 10. In this case, as the air supply pipes 5, ... Rotate, an upward flow is forcibly generated by the blowing action of the blades 5a ,.

In the ventilation unit 1 configured as described above, the supply air such as the outside air or the conditioned air introduced from the air supply port 3a passes through the inner space of the hollow fixing portion 3 and is supplied through the rotating body 2. The polluted air in the room is sucked into the exhaust pipe 4 while being discharged from the tip discharge ports 5b to 10b of the trachea 5 to 10. Therefore, as shown in FIG. 4, a centrifugal force is generated by the swirling flow N generated by the discharge air, and a negative pressure region C is generated by suctioning from the exhaust pipe 4, and the centrifugal force and the negative pressure are formed. In the range where the centripetal force due to the area C is balanced, the artificial tornado T that continues toward the suction port is generated, so that the indoor air in this area is effectively exhausted.

Further, since the discharge air is discharged in a substantially horizontal direction and the hollow rotary head 2 itself is rotatably supported, the hollow rotary head 2 and the hollow rotary head 2 are connected to the hollow rotary head 2 by a reaction caused by the discharge of the supply air. Supply pipe 5-10
And rotate automatically. When the rotation is started together with the discharge of the supply air, as shown in FIG.
The swirling flow N expanding in the horizontal direction is generated by the supply air discharged from the ..., and the indoor air attracted to the swirling flow N and the vane blades 5b to 1 attached to the air supply pipes 5 to 10 are also generated.
An upward flow U is generated by the blowing action of 0b, and smoke, heat, dust, and the like from the separated sources are lifted to the ceiling side and exhausted from the exhaust pipe 4.

By the way, in the above specific example, the air supply pipes 5 to 1 are provided.
Although the case where 0 is allowed to rotate and the blade blades 5b to 10b are attached has the highest exhaust effect, the air supply pipes 5 to 10 are fixed and the blade blades 5b to 10b are fixed as shown in FIG. When not attached, that is, the air supply pipe 5 to the hollow fixed head 14 fixed to the ceiling
Even when 10 is connected, an artificial tornado occurs due to the swirling flow of the supply air discharged in a substantially horizontal direction and the air suction from the exhaust pipe 4, and the contaminated air in the area is effectively exhausted, Due to the swirling flow N expanding in the horizontal direction, the air on the lower side is attracted by the swirling flow N and rises to generate an ascending flow, and the air from the contaminated pollution source or the like can be effectively exhausted.

[Execution Test] FIG. 6 shows the result of examination of the relationship between the total air flow rate of the supply air from the air supply pipes 5, ... And the rotation speed of the main shaft. In the test, if the ventilation unit shown in Fig. 1 has 6 outlets, remove 3 air supply pipes and perform 3
In the case of the three-point blowout (45 ° direction) and the two-point blowout (90 ° direction), a total of four cases were performed. The total air flow rate is measured in the middle of the main duct.

According to the test results, in the case of blowing out at two places, the rotation efficiency (the amount of rotations with respect to the air flow) is the best,
The worst result is obtained from 6 outlets.

Next, the effect of the upflow generated by the ventilation unit 1 shown in FIG. 1 was tested. A bucket containing hot water and dry ice was placed under the floor immediately below the ventilation unit 1, and the behavior of the dry ice smoke was visually observed by the operation of the ventilation unit 1.

As a result, in the case of FIG. 7A showing the stop time, the smoke of dry ice, which is heavier than the air, is diffused along the floor without rising upward, whereas the ventilation unit is rotated. 7 and FIG. 7 (C) at start-up and FIG. 7 (C).
As shown in the normal operation, the ascending air current lifted the smoke of dry ice upward, and the effect of the device of the present invention was clarified.

[0026]

As described above in detail, according to the present invention, even if the ventilation unit is installed on the ceiling part, air from a polluted air source placed on, for example, a separated floor part is generated due to the generation of an upward flow. Since it can be lifted up to the ceiling side and exhausted, the indoor space between them can be freely and effectively utilized.

[Brief description of drawings]

FIG. 1 is a side view of a ventilation unit according to the present invention.

FIG. 2 is an enlarged vertical sectional view of a main part of a ventilation unit.

FIG. 3 is a plan view of a ventilation unit.

FIG. 4 is a flow chart of indoor air by a ventilation unit.

FIG. 5 is a side view of another ventilation unit according to the present invention.

FIG. 6 is a diagram showing the relationship between the total air flow rate and the rotation speed.

FIG. 7 is a diagram showing the results of implementation tests.

FIG. 8 is a diagram showing a conventional ventilation system.

FIG. 9 is an exhaust unit in a conventional range hood.

FIG. 10 is a view showing an exhaust mechanism of a conventional artificial tornado.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Ventilation unit, 2 ... Hollow rotating head, 3 ... Hollow fixed part, 4 ... Exhaust pipe, 5-10 ... Air supply pipe, 5a-10a ... Blade blade, 5b-10b ... Discharge port

Front page continuation (72) Inventor Hiroshi Segawa 4-4-20 Nihonbashi Honishicho, Chuo-ku, Tokyo Mitsui Second Annex Shin Nihon Air Conditioning Co., Ltd. (72) Inventor Shigeru Motohashi 4-chome, Nihonbashi Honishicho, Chuo-ku, Tokyo No. 4-20 Mitsui Second Annex Inside Shin Nihon Air Conditioning Co., Ltd.

Claims (3)

[Claims] 1. A hollow fixing portion which serves as a relay portion for supply air and which is fixed to a ceiling portion in a room, an exhaust pipe which is inserted through the hollow fixing portion toward an indoor side, and an exhaust pipe. A hollow rotary head, which is rotatably supported as a support shaft and has a space communicating with the hollow portion of the hollow fixed portion, and one end of which is connected to the outer surface of the hollow rotary head,
At least a plane and a plurality of air supply pipes having a discharge port that is substantially horizontal and directed in the same rotation direction at a position radially separated from the center of rotation, and the hollow rotation is accompanied by air supply from the discharge port. A ventilation unit characterized in that the head and the air supply pipe are configured to rotate on their own axis. 2. The ventilation unit according to claim 1, further comprising vane blades for generating an ascending air current to the air supply pipe. 3. A hollow fixed head, which serves as a relay portion for supply air and is fixed to a ceiling portion in the room, an exhaust pipe inserted through the hollow fixed head with its suction port facing the indoor side, and the hollow fixed head. And a plurality of air supply pipes which are connected to the outer surface of the at least one of the air supply pipes and which are at least radially spaced apart from each other in the radial direction and have discharge ports directed substantially horizontally and in the same rotation direction.