U.S. patent number 3,630,039 [Application Number 05/016,040] was granted by the patent office on 1971-12-28 for individual cooling device.
This patent grant is currently assigned to Midori Safety & Industry Co., Ltd.. Invention is credited to Toshiyuki Hayashi.
United States Patent |
3,630,039 |
Hayashi |
December 28, 1971 |
INDIVIDUAL COOLING DEVICE
Abstract
Device for cooling particular individual workers in a hot
workshop or other working place by means of the expansion of air, a
heat exchanger and the separation of portions at different
temperatures.
Inventors: |
Hayashi; Toshiyuki (Soka City,
JA) |
Assignee: |
Midori Safety & Industry Co.,
Ltd. (Tokyo, JA)
|
Family
ID: |
27519932 |
Appl.
No.: |
05/016,040 |
Filed: |
March 3, 1970 |
Foreign Application Priority Data
|
|
|
|
|
Mar 10, 1969 [JA] |
|
|
44/17535 |
Mar 10, 1969 [JA] |
|
|
44/17536 |
Mar 10, 1969 [JA] |
|
|
44/17537 |
Mar 10, 1969 [JA] |
|
|
44/17538 |
May 17, 1969 [JA] |
|
|
44/38212 |
|
Current U.S.
Class: |
62/5;
62/259.3 |
Current CPC
Class: |
F25B
9/04 (20130101) |
Current International
Class: |
F25B
9/02 (20060101); F25B 9/04 (20060101); F25b
009/02 () |
Field of
Search: |
;62/5,259 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Wye; William J.
Claims
What is claimed is:
1. In a device cooling one or more individuals individually having
compressed air generating means (1); a cooling device (6) connected
to said compressed air generating means for cooling said air; and,
a vortex tube (9) carried by each individual (8) supplied with said
cooled air so that cold air separated therein is diffused into the
interior of the working clothes worn by said individual or
individuals, the improvement therein comprising a bifurcated
compressed air supply pipe connected to said compressed air
generator means (1) with one of the branched pipes (4a) connected
to a compressed air feeding port (7a) of a vortex tube (7) mounted
to a cooling tank (6) and the other branched pipe (4b) being
connected to a compressed air feeding port of a vortex tube (9)
carried by said individual or individuals (8); a cooling pipe (12)
connected to a cold-air outlet port (7b) of said vortex tube (7)
extended into said cooling tank (6) and opened therein; and
distributor tubes (13) adapted to diffuse cold air into the inside
of the working clothes worn by each worker (8) connected to a
cold-air outlet (9b) of said vortex tube.
2. In a device cooling one or more individuals individually having
compressed air generating means (1); a cooling device (6) connected
to said compressed air generating means for cooling said air; and,
a vortex tube (9) carried by each individual (8) supplied with said
cooled air so that cold air separated therein is diffused into the
interior of the working clothes worn by said individual or
individuals, the improvement therein comprising a compressed air
supply pipe (4) connected to said compressed air generator means
(1) inserted into the inside of a cooling tank (6), said supply
pipe being bifurcated at a point where it just passed the tank
inside, with one branch(4a) thereof being connected to a compressed
air feeding port (7a) of a vortex tube (7) mounted to said cooling
tank (6) and the other branch (4b) being connected to a compressed
air feeding port (9a) of a vortex tube (9) carried by said
individual or individuals (8); a cooling pipe (12) connected to a
cold-air outlet port (7b) of said vortex tube (7) inserted into the
inside of said cooling tank (6) and opened therein; and cold-air
distributor tubes (13) adapted to diffuse cold air into the
interior of the working clothes worn by said individual or
individuals (8) connected to a cold-air outlet (9b) of said vortex
tube (9).
3. In a device cooling one or more individuals individually having
compressed air generating means (1); a cooling device (6) connected
to said compressed air generating means for cooling said air; and,
a vortex tube (9) carried by each individual (8) supplied with said
cooled air so that cold air separated therein is diffused into the
interior of the working clothes worn by said individual or
individuals, the improvement therein comprising one or more air
tank bodies (15) connected between a compressed air generator means
(1) and a cooling tank (6) so formed as to have a circular
sectional shape, and piping connection arranged such that
compressed air is ejected from the tangential direction against the
circular section of each tank body (15) so that compressed air is
taken out from the central portion of each tank body (15), with
compressed air released from the central portion of the rearmost
tank body (15) being forwarded to said cooling tank (6).
4. In a device cooling one or more individuals individually having
compressed air generating means (1); a cooling device (6) connected
to said compressed air generating means for cooling said air; and,
a vortex tube (9) carried by each individual (8) supplied with said
cooled air so that cold air separated therein is diffused, into the
interior of the working clothes worn by said individual or
individuals, the improvement therein comprising having said vortex
tube (7) mounted in a sealed tank (17) filled with cooling liquid
(19), with a cooling pipe (12) connected to a cold-air outlet of
said vortex tube inserted into said tank and opened therein, said
heat exchanger also having air eduction passages through which cold
air released into the inside of the tank is passed along the
heat-insulating tank wall and discharged outside of the tank, and,
piping arranged such that compressed air cooled through said heat
exchanger is supplied into said vortex tube carried by said
individual or individuals (8).
5. In a device cooling one or more individuals individually having
compressed air generating means (1); a cooling device (6) connected
to said compressed air generating means for cooling said air; and,
a vortex tube (9) carried by each individual (8) supplied with said
cooled air so that cold air separated therein is diffused into the
interior of the working clothes worn by said individual or
individuals, the improvement therein comprising a heat exchanger
arranged such that a vortex tube (7) into which compressed air is
supplied from a cold-air generator means (1) in which cold air is
separated, is mounted in a sealed tank (17) having a space therein
with a cooling pipe (12) connected to a cold-air outlet of said
vortex tube being inserted into said tank and opened therein, said
heat exchanger also having air eduction passages through which cold
air released into the inside of the tank is passed along a
heat-insulating tank wall and discharged outside of the tank, and
piping arranged such that compressed air cooled through said heat
exchanger is supplied into a vortex tube carried by each individual
or individuals (8).
Description
BACKGROUND OF THE INVENTION
The present invention relates to a device for cooling individual
workers in a hot workshop, factory or other working places.
THE PRIOR ART
The presently available cooling devices of this type are
constructed so that compressed air compressed by a local compressed
air generating device such as a compressor is directly fed into a
vortex tube (in which compressed air is ejected from a jet nozzle
provided in contact with the tubes inside its face to form a vortex
in the tube and the fed compressed air is thereby separated into
cold air and warm air) which each individual worker carries with
him, and the separated cold air is released into the interior of
the working clothes. However, in such cooling devices, in case the
ambient temperature around the compressor or other compressed air
generating means is raised higher than normal temperature due to
more heat present in the working place, the temperature of the
compressed air discharged from the compressor is also raised
correspondingly. For example, the temperature of the air compressed
when the ambient temperature around the compressor is 60.degree. C.
will amount to as much as about 190.degree. C. Also, in the case of
cooling the operator in the operator's room of a moving machine
such as a crane, the compressor must be mounted in or on the moving
machine, and, as a consequency, the distance between the compressor
and the vortex tube carried by the operator is inevitably
shortened, allowing the high heat within the compressor to pass
directly to the vortex tube. In either case, it is hardly possible
to effectively separate cold air having a temperature suited for
cooling in the vortex tube from the compressed air at high
temperature, with consequent poor heat-separating effect in the
vortex tube.
OBJECT OF THE INVENTION
The present invention is designed to eliminate defects inherent in
conventional devices and contemplates a construction arranged so
that the air compressed in a compressor or other similar means is
precooled before it is supplied to a vortex tube carried by each
individual worker.
SUMMARY OF THE INVENTION
Generally speaking, the present invention contemplates a device for
cooling one or more individual workers comprising a compressed air
generating means providing compressed air, a cooling device, or
cooling devices for cooling the compressed air, and a vortex tube
receiving this cool compressed air, carried by each individual
worker so that colder air separated therein is diffused into the
working clothes carried by each worker.
Other objects and advantages of the invention will be more readily
apparent from the following detailed description when taken
together with the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a circuitry connection diagram of one embodiment of the
present invention.
FIG. 2 is a circuitry connection diagram of another embodiment of
the present invention.
FIG. 3 is a cross-sectional view of an air tank used in the
above-mentioned two embodiments.
FIG. 4 is a partial longitudinal sectional view of an air tank used
in the above-mentioned two embodiments.
FIG. 5 is a sectional view of a heat exchanger used as a cooling
tank in the aforementioned two embodiments.
FIG. 6 is also a sectional view of a heat exchanger used as a
cooling tank in the aforementioned two embodiments.
DETAILED DESCRIPTION
Referring first to FIG. 1, in which one embodiment of the present
invention is diagrammatically illustrated, 1 denotes a pair of
compressors, 2 a motor for driving said compressors, 3 an air tank
for receiving and preserving compressed air introduced from the
compressors 1, and 4 a compressed air supply pipe connected to the
compressor 1 through the air tank 3, and pipe 16. Said pipe 4 is
bifurcated at 5 with its one branch line 4a being connected to a
compressed air feed port 7a of a vortex tube 7 mounted in a cooling
tank 6 and the other branch line 4b being connected to a compressed
air feed port 9a of a vortex tube 9 carried by the individual
worker 8 working in a hot workshop. It will be noted that the
middle portion 10 of the branch line 4b is coiled spirally so as to
elongate as much as possible the path of that compressed air which
passes through the interior of the cooling tank 6 thereby to
maximize the cooling effect. Twelve denotes a cooling pipe having
its one end connected to a cool air outlet port 7b of the vortex
tube 7 and its other end inserted into the interior 11 of the
cooling tank 6 and being arranged so as to diffuse the cool air
separated by the vortex tube 7 into the interior 11 of the cooling
tank 6. 13 is a distributor tube for releasing the cool air,
separated in the vortex tube 9, into the interior of the working
clothes that the worker 8 wears, and 14 a drain cock provided on
the air tank 3, primarily for water.
Another embodiment involves a partial change in the connecting
circuit of the compressed air supply pipe 4 of the first
embodiment. Both embodiments have two compressors provided with
valves in the circuitry for the compressed air so one may be shut
down without interrupting the supply of compressed air to the air
tank 3. The motor may also be shut down for a time by closing a
valve in that portion 16 of the air supply pipe that lets air into
air tank 3.
In the second embodiment, as shown in FIG. 2, the middle portion 10
of the compressed air supply pipe 4 connected to the air tank 3 is
coiled spirally and inserted into the inside 11 of the cooling tank
6 in that state. This pipe 4 is bifurcated at the point 5 where the
pipe has just passed the cooling tank 6, with one branch line 4a
being connected to the compressed air feeding port 7a of a vortex
tube 7 mounted on the cooling tank 6 and cooling it and the other
branch line 4b being connected to the compressed air feeding port
9a of a vortex tube 9 carried by the worker. The construction of
both embodiments is otherwise the same.
In the second embodiment, as compared with the first embodiment,
the compressed air from the air tank 3 is precooled in the cooling
tank 6 and then fed into the vortex tube 7, so that the cold air
separated and released from the cold air outlet 7b has a lower
temperature than that of the cold air obtained in the first
embodiment where the compressed air in the air tank 3 is directly
fed into the vortex tube 7. Thus, the cooling efficiency of the
cooling tank 6 is enhanced in the second embodiment, under like
conditions otherwise. The matter is further clarified in the more
detailed drawings.
Referring now to FIGS. 3 and 4, there are shown the detailed
operational illustrations of the air tank 3 used in each of the
preceding embodiments. The tank body 15 is circular in section, and
the compressed air supply pipe 16 connecting the compressor 1 with
the air tank 3 is joined with the tank body so as to eject the
compressed air into the tank body 15 substantially tangentially to
the circular section of the tank body 15. As will also be noted,
the compressed air supply pipe 4 used in each of said embodiments
is connected to the center of the tank body 15. The tank body 15 is
not limited to only one, but several may be used in combination,
especially if the said tank bodies are in series connection. In
such a case, piping arrangements are made so that the compressed
air is ejected from the tangential direction against the circular
section of each tank body 15 so that said air is released from the
central part of each tank body 15. Radiation is effected at each
stage, made more effective, if desired, by fins on the tanks, and
the compressed air released from the central part of the tank body
15 at the tail end is forwarded to the cooling tank 6.
With the air tank being constructed as described above, the
compressed air, compressed and highly heated by the compressor 1,
produces a vortex while being uniformly brought into contact with
the cylindrical wall of the tank body 15, so that said compressed
air radiates its heat through the wall face and rises along the
vacuum portion formed in the center of the tank body, causing some
reduction of the temperature of the compressed air. When using a
plurality of tank bodies 15 is series combination, the compressed
air temperature is successively reduced in temperature each time
radiation is effected by each tank body 15, so that the highly
heated compressed air produced by the compressor 1 is considerably
reduced in its temperature by the air tank 3 and then delivered to
the compressed air supply pipe.
FIGS. 5 and 6 illustrate the detailed construction of the heat
exchangers used as the cooling tank 6 in the respective embodiments
shown above. In FIG. 5, 17 denotes generally a sealed tank of which
the wall is composed in part of a heat-insulating material 18, such
as asbestos. The inside 11 of the tank is filled with cooling
liquid 19 such as water, and the vortex tube 7 mentioned in each
said embodiment is mounted on top of the sealed tank 17. A cooling
pipe 12 connected to the cold-air inlet port 7b is inserted into
the cooling liquid 19 in the tank, said cooling pipe having its end
portion annularly bent and opened near the bottom of the tank. It
will also be noted that the compressed air supply pipe 4 used in
each embodiment is inserted into the sealed tank 17 in a spirally
bent form so that it extends for the longest possible distance
within the cooling liquid 19. 20 denotes air eduction passages
extending from top of the sealed tank 17 downwardly along both
sides of the tank wall and opened outwardly at the bottom of the
tank 17, and 22 indicates vent holes formed at the top of the
sealed tank 17, through which the cold air released into the tank
interior 11 is discharged to the eduction passages 20.
In the above-described construction, the compressed air from the
compressor 1 passes through the air tank 3, and thereafter one
portion thereof is supplied to the vortex tube 7 where it is
deprived of some of its heat. This cold air which passes downwards
through the cooling pipe 12 and is released from its end near the
bottom of the sealed tank 17 into cooling liquid 19 in the form of
bubbles 23 which in turn rise up through cooling liquid 19 while
cooling it and are discharged from the vent holes 22 into the
eduction passages 20 through which the air moves downwards while
cooling the tank wall and is finally discharged outside of the tank
from the discharge ports 21 formed at the bottom of the tank. The
remaining compressed air is cooled while it passes through the
compressed air supply pipe 4 inserted in a spirally bent form in
the sealed tank 17 and then is supplied to the vortex tube 9
carried by the worker 8, where the air is again deprived of some of
its heat to be rendered still cooler air, which is then diffused
from the distributor pipes 13 into the interior of the working
clothes worn by the worker 8.
Since the heat exchanger is arranged so that the cold air released
into the sealed tank is discharged through the eduction passages
provided along the tank wall, said said air can perform both the
cooling actions of cooling the cooling liquid, as well as the tank
wall, thus appreciably enhancing the heat-insulating effect of the
sealed tank to achieve sufficient cooling of the tank interior.
The heat exchanger shown in FIG. 6 has the same construction as the
one shown in FIG. 5, except that a space 24 is formed in the
interior of the sealed tank 17. The vortex tube 7 is arranged so
that its cold-air outlet 7b communicates with the tank interior 11
at the bottom of the sealed tank 17 so as to facilitate diffusion
of cold air into the entire space of the tank interior 11.
This heat exchanger, as described above is constructed in such a
manner that the interior of the sealed tank forms the space 24, so
that cold air deprived of some of its heat in the vortex tube 7 can
be readily diffused into the entire space in the tank, thus
promoting cooling efficiency in the tank. Further, double cold-air
layers are formed each in the tank interior and in the tank wall as
in the case of the heat exchanger shown in FIG. 5 whereby the
heat-insulating effect of the sealed tank is appreciably enhanced,
permitting sufficient cooling within the tank.
If the air tank and the cooling tank having the above-described
construction are connected between the compressor in the present
device and the vortex tube carried by the worker, the compressed
air obtained from the compressor is effectively cooled at each
stage and fed into the vortex tube carried by the worker, so that
even if the ambient temperature around the compressor is above the
normal temperature, or if heat above that of the ambient, produced
by the compressor should be transferred to the vortex tube carried
by the worker, it is possible to obtain suitably cooled air always
and supply it into the interior of the clothes worn by the worker.
An additional feature of the present invention is that all the
parts constituting the assembled structure of the present apparatus
can be operated by compressed air obtained from the compressor, so
that operation of the apparatus is made at high performance.
* * * * *