Tornado type intake and blowing device

Details Tornado type intake and blowing device Tornado type intake and blowing device

2001-05-10

2003-10-14

Joyce, Harold (Department: 3749)

Ventilation

Workstation ventilator

Having inlet airway

C126S29900R, C454S189000, C454S235000

Reexamination Certificate

active

06632132

ABSTRACT:

This application is the national phase under 35 U.S.C. §371 of PCT International Application No. PCT/JP00/04229 which has an International filing date of Jun. 28, 2000, which designated the United States of America.
TECHNICAL FIELD
The present invention relates to a tornado type air intake and blowing device which enables air of a specified local area to be efficiently taken in without causing diffusion of the air by creating spiral flows in reverse directions to each other which are an outside blowoff direction and an inside intake direction.
BACKGROUND ART
As an effective ventilation method for efficient discharge of, for example, indoor air in a specified local area without diffusion, there has recently been proposed the so-called tornado type air intake and blowing device (see Japanese Patent Application No. H11-131041 as an example). A tornado type device as shown in
FIG. 38
for example is provided with two ducts having an exhaust duct
2
and an air supply duct
5
which are penetrated between indoors and outdoors. Corresponding to these ducts, there are provided a funnel-shaped exhaust hood
1
having an exhaust port
1
a
and a doom-shaped air supply chamber
4
having an air blowing port
3
to constitute a two-layer inside and outside structure, respectively. The exhaust duct
2
is communicating with the exhaust port
1
a
at the center of a top plate portion
1
b
of the exhaust hood
1
. On the other hand, an air supply inlet
5
a
of the air supply duct
5
is provided in an inclined and tangent direction on the upper side of the air supply chamber
4
, and is communicating with an air spiral supply space
4
c
. The outside air introduced into the air spiral supply space
4
c
of the air supply chamber
4
through the air supply inlet
5
a
of the air supply duct
5
is spirally blown from the air blowing port
3
to the outer periphery of the specified local area to form an air curtain-like spiral flow F
1
. The air blowing port
3
has spiral flow generating stators
3
a
,
3
a
. . . provided around the exhaust port
1
a
on the lower side of the air supply chamber
4
. At the same time of blowing the air, the air in the specified local area surrounded by the spiral flow F
1
is sucked toward the exhaust port
1
a
on the side of the exhaust duct
2
, that is, to the direction opposite to the air blown from the air blowing port
3
to the outer periphery of the specified local area. During air suction, a negative pressure is produced to allow a suction air vortex flow F
2
to be formed, and the flow F
2
ascends like a tornado in the exhaust port
1
a
direction, by which effective ventilation is implemented.
However, the tornado type air intake and blowing device having the above-stated structure has a following drawback.
That is, in the structure shown in
FIG. 38
, an opening plane of the exhaust port
1
a
in the exhaust hood
1
and an opening plane of the air blowing port
3
are both disposed together on the same plane on the lower side of the air supply chamber
4
. Therefore, if an exhaust port
1
a
with a desired opening diameter D
1
is installed to obtain high air-collecting performance, an outside diameter D
2
of the air supply chamber
4
is required to include the opening diameter D
1
and a width D
3
of a decorative panel necessary for installing the air blowing port
3
(D
2
=D
1
+2×D
3
). This leads to excessive increase of the outside diameter of the air supply chamber
4
, which makes downsizing of the device difficult.
DISCLOSURE OF INVENTION
In order to solve the above-stated drawback, an object of the present invention is to provide a tornado type air intake and blowing device downsized by disposing an air blowing port on a side wall of an air supply chamber or by offsetting in a vertical direction a position of an opening plane of the air blowing port on a lower side of the air supply chamber and a position of an opening plane of an air-collecting opening on an exhaust hood side.
In order to accomplish the above object, the present invention is structured having the following drawback-solving means.
1. A First Aspect of the Invention
A tornado type air intake and blowing device of the present invention provides a tornado type air intake and blowing device, comprising: an exhaust port communicating with an exhaust duct; an air supply chamber which is disposed to enclose the exhaust port and to which air is supplied through an air supply inlet; and an air blowing port spirally blowing air supplied to an inside of the air supply chamber from an outer periphery of the exhaust port diagonally downward, wherein the air blowing port is provided on a side wall of the air supply chamber.
According to this constitution, the exhaust port can be formed almost all over the lower side opening plane of the air supply chamber. Therefore, the outside diameter corresponding to a necessary opening diameter of the exhaust port turns out to be sufficient for the air supply chamber, which contributes to form a downsized device.
2. An Embodiment of the Invention
In the tornado type air intake and blowing device of this embodiment, air blowing ports are provided continuously on a circumference of the side wall of the air supply chamber.
According to this constitution, an airflow spirally blown from the air blowing ports form a plane-shaped flow from the beginning. Therefore, no gap is generated in the air curtain flow event in the vicinity of the exhaust port, which prevents leakage of exhaust air to the surroundings.
3. An Embodiment of the Invention
In the tornado type air intake and blowing device of this embodiment, air blowing ports are provided at a specified interval on a circumference of the side wall of the air supply chamber.
According to this constitution, therefore, it is possible to spirally blow air only by, for example, opening each air blowing port diagonally downward. Accordingly, the air blowing port can be formed with easy operation and low costs compared to the case where the air blowing port is continuously formed and a large number of spiral flow generating stators are disposed together for example.
4. An Embodiment of the Invention
In the tornado type air intake and blowing device of this embodiment, a separation facilitating guide for a blowoff airflow is provided under the air blowing ports.
Therefore, a blowoff airflow is efficiently separated and blown off smoothly by this constitution.
5. An Embodiment of the Invention
In the tornado type air intake and blowing device of this embodiment, an edge portion is disposed on a downstream side of the air blowing ports at a specified distance from the air blowing ports.
According to this constitution, therefore, a blowoff airflow blown from the air blowing ports is attached to the edge portion provided on the specified position on the downstream side. Accordingly, the blowoff airflow can be fixed to a specified direction without decreasing a velocity of the blowoff airflow, by which a stable spiral flow can be generated.
6. The Second Aspect of the Invention
The present invention also provides a tornado type air intake and blowing device as air conditioner comprising; an air suction port for air conditioning; an air passage provided around the air suction port for blowing intake air through a fan and a heat exchanger; and an air blowing port spirally blowing conditioned air passed through the air passage from an outer periphery of the air suction port diagonally downward, wherein the air blowing port is provided on a side wall of a body casing for the air conditioner.
According to this constitution, it is possible to form the air suction port as wide as possible over the lower side opening plane of the body casing. Therefore, the outside diameter corresponding to the necessary opening diameter of the air suction port, diameter of the fan, width of the heat exchanger, and the like is eventually sufficient for the body casing, by which the body of the air conditioner can be formed downsized.
7. The Third Aspect of the Invention
The present invention also provide a torna

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