JPH08159634A - Cooling device - Google Patents

Abstract

PURPOSE: To provide a cooling device in which a fast and positive temperature control can be carried out under an easy operation and it has a superior safety in operation. CONSTITUTION: A bomb 6 filled with a liquefied carbonated gas is provided with an injection valve 7 having an injection port 10 therein. The injection port 10 is provided with an injection mixing cylinder 8 having an air intake opening formed at its circumferential wall and further having its longitudinal extremity end opened so as to constitute a cooling device 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling device for injecting low temperature air or low temperature gas to cool a human inflamed area or a part such as a pot.

[0002]

2. Description of the Related Art When cooling an acute inflamed area such as a bruise or a sprain, there is a cooling method using ice or gel as the cheapest and simplest cooling method. However, this method is not suitable when the tenderness is severe in the inflamed area because the refrigerant is brought into contact with the inflamed area. Therefore, a cooling method using a low temperature gas such as liquefied gas has been conventionally used as a method for preventing the refrigerant from coming into contact with the inflamed area.

As such a method, as shown in FIG. 9, a method of directly injecting a liquefied gas from an aerosol can 1 such as LPG or Freon through a nozzle 2, and as shown in FIG. 10, liquid nitrogen from a liquid nitrogen container 3 is used. Was introduced into the heat exchanger 4 as a refrigerant, and there was a method of cooling the air flowing through the heat exchanger 4 and injecting it through a nozzle.

[0004]

The method of [Problems to be Solved by the Invention] has a high risk of causing frostbite because liquefied gas may directly touch the skin, and also has a problem of safety against fire and ozone layer depletion. There was a problem of environmental destruction. Since the method of (1) requires a large-scale device, it is expensive and not easy to carry. Further, the liquid nitrogen cylinder had a problem of evaporation loss even when it was not used. Further, a predetermined blowing temperature cannot be obtained until the pipes and nozzles on the way are cooled, and it takes about 10 to 20 minutes to reach the predetermined temperature, which is not efficient.

The present invention has been made in view of the above-mentioned circumstances, and the temperature control can be performed quickly and surely by an easy operation, the desired low temperature cold air gas can be easily injected, and the cooling device is excellent in safety. The purpose is to provide.

[0006]

In a cooling device according to the present invention, a cylinder filled with liquefied carbon dioxide gas is equipped with an injection valve having an injection port, and the injection port has an air intake opening on its peripheral wall. The means for solving the above-mentioned problems was to install a mixing cylinder which is arranged and whose front end in the longitudinal direction is opened.

At the tip end opening of the mixing cylinder, an ejection hole communicating with a nozzle pipe connected to the injection port of the injection valve is arranged at the center.
A mixing nozzle having a plurality of ventilation holes around it can be arranged. The outflow side surface of the mixing nozzle may be configured so as to form a conical recess having a central ejection hole at the top. The end portion of the nozzle pipe connected to the ejection port of the ejection valve may be arranged so as to penetrate the ejection hole arranged at the center of the mixing nozzle and project from the outlet end.

[0008]

In the cooling device of the present invention, the peripheral wall has an opening for air intake, and the mixing cylinder having an opening at the tip is provided at the injection port of the injection valve mounted on the cylinder filled with liquefied carbon dioxide. During injection, external air is sucked into the mixing cylinder from the opening and mixed with the liquefied carbon dioxide gas to be injected, and the temperature of the injection gas is adjusted in the range of −78 ° C. to room temperature.

Further, a porous body is arranged at the opening of the tip of the mixing cylinder so that the cold air to be injected flows out as a laminar flow from the mixing cylinder, so that the feel on the skin is softened. Furthermore, by adjusting the pore diameter and porosity of the porous body disposed at the tip of the mixing cylinder or adjusting the amount of air entrained in the mixing cylinder, the temperature of the injection gas is adjusted to cool the affected area. It is possible to instantly obtain a gas in a temperature range suitable for. -50 to -20 ° C is suitable as the gas temperature at the cooling site.

[0010]

The present invention will be described in detail below. FIG. 1 is a schematic view showing the outer appearance of a first embodiment of the present invention, showing a portable cooling device 5 of a small cylinder direct connection type.

The cooling device 5 of the present invention shown in FIG. 1 is roughly constituted by a cylinder 6, an injection valve 7, and an injection mixing cylinder 8.

The cylinder 6 is of a cartridge type capable of taking out liquid, and the inside thereof is filled with liquefied carbon dioxide gas. As the cylinder 6, it is preferable that it is small in size because it saves space, and particularly from the viewpoint of easy handling, it is preferable that the capacity is about 100 cc or less and that it can be held by one hand.

An injection valve 7 is provided at the opening above the cylinder 6.
However, it is detachably attached by a method such as screwing.
The injection valve 7 is provided with a lever 9 for opening and closing the valve, and an injection port 10. When the lever 9 is pushed, the valve is opened, and the liquefied carbon dioxide gas is atomized and injected from the injection port 10.

An injection mixing cylinder 8 is attached to the injection port 10 of the injection valve 7. The injection mixing cylinder portion 8 is a hollow cylindrical body 11 and a ring-shaped cylinder 1 that rotates around the outer periphery of the cylindrical body 11.
It is composed of two.

The injection mixing section 8 comprises a substantially hollow cylindrical body 11 having openings 11a and 11b at both ends.
As shown in (b), at the injection port 10 of the injection valve 7,
It is attached by a method such as screwing or fitting so as to surround it. Two slit-shaped openings 13, 13 are formed in the peripheral wall of the hollow cylindrical body 11. The openings 13 and 13 are arranged in the circumferential direction of the cylindrical body 11 and the opening 1.
3 and 13 have the same longitudinal direction and both openings 13 and 13
Are formed so as to be point-symmetric with respect to the central axis of the cylindrical body 11. The openings 13, 13 are for taking in entrained air from the surroundings. As shown in FIG. 1, the ring-shaped tube 12 is rotatably attached so as to cover the openings 13, 13 of the cylindrical body 11 so as to adjust the opening degree.

The ratio of the diameter (D) to the length (L) of the cylindrical body 11 of the injection mixing cylinder 8 is to form a mixing region for effectively mixing the low temperature carbon dioxide gas and the entrained air. It is important that the ratio of the diameter (R) of the cylindrical body 11 to the length (L) of the cylindrical body 11 is 3 to 1 in L / D value from the base end side of the cylindrical body.
A value of 0 is preferable, and a value of 4 to 6 is more preferable. The diameter of the cylindrical body 11 is determined by the inner diameter of the injection port 10, but is preferably such that a low temperature gas flow velocity suitable for effectively cooling the inflamed area can be obtained. The flow velocity of such low temperature gas is 5 to
20 m / s, more preferably 10 to 15 m / s.

On the outer side surface of the injection mixing cylinder 8, as shown in FIG.
As shown in FIG. 4, four protrusions 14, 14, 14, 14 are provided which serve as stoppers for preventing the ring-shaped cylindrical body 12 from falling off the end of the hollow cylindrical body 11.

The ring-shaped tube 12 is of a ring shape having a width slightly wider than the slit width of the openings 13, 13 provided in the hollow cylindrical body 11. In this embodiment, the ring-shaped tube 12 is also formed with two adjusting ports 15 and 15, and each adjusting port 15 has an opening 1 of the hollow cylindrical body 11.
It has almost the same shape as 3, 13. Then, as shown in FIG. 4, by rotating the ring-shaped tube 12 while sliding it along the outer surface of the cylindrical body, the cylindrical opening 1
3 and 13 can be adjusted from fully closed (FIG. 4 (a)) to fully open (FIG. 4 (b)).

With the above structure, the lever 9 and the ring-shaped tube 12 can be simultaneously moved by the thumb and forefinger of the same hand while supporting the entire cooling device 5 with one hand, and the injection mixing tube portion 8
The temperature of the injection gas can be easily controlled by adjusting the opening degree of the openings 13, 13 while pressing the lever 9 while directing the tip toward the cooling portion.

Further, in this embodiment, as shown in FIGS. 3 and 4, the protrusion 16 is formed on the inner surface of the ring-shaped tube 12 at a position substantially close to one end of each adjusting port 15. The protrusions 16 and 16 are formed so as to be point-symmetric with respect to the central axis of the ring-shaped tube 12. The height of the protrusions 16, 16 is the same as that of the hollow cylindrical body 11 described above.
It is almost the same as the wall thickness of. These protrusions 16, 16
Is for preventing dew condensation or frost formation due to cooling of the injection mixing cylinder 8 itself due to long-term use of the cooling device 5.
As shown in FIG. 4, when the ring-shaped tube 12 is rotated to adjust the opening degree of the openings 13 and 13, the protrusions 16 and
16 slides on the openings 13, 13 of the hollow cylindrical body 11 to remove dew or frost on the openings 13, 13.

FIGS. 5, 6 and 7 show another embodiment.
As shown in FIG. 5, a substantially cylindrical mixing nozzle 20 is fitted and provided in the tip opening 11 a of the hollow cylindrical body 11 of the injection mixing cylinder portion 8. The mixing nozzle 20 is a cylindrical body 11.
Although it may be attached as a separate component from the above, or may have a structure integrated with the cylindrical body 11, the mixing nozzle 20 is entirely fitted into the inside of the cylindrical body 11, and the tip end edge 11 of the cylindrical body is
a is slightly protruding.

The mixing nozzle 20 has an injection port 21 formed in the central portion on the front end side. The ejection port 21 is a substantially conical recess, and an ejection port 22 is formed from the center of the ejection port 21 (the apex of the cone) along the central axis of the cylindrical body 11. Then, as shown in FIG. 7, a plurality of ventilation holes 23 are formed so as to surround the ejection holes 22. The central axis of each vent hole 23 is parallel to the central axis of the jet hole 22, and both the jet hole 22 and the vent holes 23 penetrate the mixing nozzle 20 in the central axis direction.

As shown in FIG. 5, an injection nozzle S made of a thin tube is inserted into the ejection hole 22 so that the cooling gas is ejected toward the outside of the concave ejection port 21 of the mixing nozzle 20.

The concave space of the injection port 21 of the mixing nozzle 20 is for mixing the low temperature gas from the injection nozzle S and the entrained air from the ventilation holes 23. Therefore, from the viewpoint that the low-temperature gas and the entrained air are effectively mixed, and further, during the mixing, frost formation is minimized and the frost is not scattered, the position of the tip Sa of the injection nozzle S, The opening diameter A of the ejection port 21 and the opening degree θ thereof are determined.

First, it is preferable that the tip end Sa of the injection nozzle S is substantially on the same plane as the openings 23a ... Of the ventilation holes 23. In this case, the tip S of the injection nozzle S
Frost grows on the outer peripheral surface of the jet nozzle from a to the jet hole opening 22a, but since this is on the opposite side of the jet nozzle tip Sa in the jet direction, the frost does not scatter as ice particles during jetting.

On the other hand, if the injection nozzle tip Sa
However, when the injection nozzle S is mounted so as to be flush with the ejection hole opening 22a or further inside (on the right side in FIG. 5), when the cooling gas is ejected for a long time, the ejection port is ejected from the ejection hole opening 22a. Frost grows along the wall and vents 23
... may become clogged, or frost may become ice particles and scatter toward the affected area.

Second, the ratio of the opening diameter A of the injection port 21 of the mixing nozzle 20 to the outer diameter of the hollow cylindrical body 11 is 40.
About 75% is preferable, and about 50% is particularly preferable.
If the opening diameter A of the injection port 21 is too large, it is necessary to lengthen the protruding amount of the hollow cylinder tip edge 11a for mixing the low temperature gas and air. Frost may occur on the edge 11a, which may scatter toward the affected area.

Thirdly, in order to effectively mix the low temperature gas and the air, the opening degree of the injection port 21 (vertical angle of the cone) θ
Is preferably about 40 to 85 degrees, and particularly preferably about 50 to 70 degrees.

With the above structure, the lever 9 and the ring-shaped tube 12 can be simultaneously moved by the thumb and forefinger of the same hand while supporting the cooling device 5 as a whole with one hand, and the lever 9 while directing the tip of the injection part 8 toward the cooling part. While pressing, cold air is obtained and can be cooled.

(Experimental Example) With the above-mentioned structure, the hollow cylinder 11 of the mixing cylinder 8 has an outer diameter of 20 mm, and the opening diameter A of the injection port 21 of the mixing nozzle 20 is 5 mm, 10 mm and 15 mm. Cooling equipment is manufactured, and each ejection hole 2 has an inner diameter of 1 mm.
Eight vent holes 23 having an inner diameter of 2 mm were formed around No. 2. As a result of using these cooling devices, 10 mm and 15
With respect to mm, in all cases, frost was formed only on the outer peripheral surface of the jet nozzle S on the rear side of the tip Sa, and ice particles were not scattered during jetting.

FIG. 8 shows a stationary cooling device 30 instead of the portable cooling device using the small cylinder shown in FIG.
Is shown. In the stationary cooling device 30, a large cylinder with a siphon is used as the cylinder. Further, the cylinder 31 is fixed to a pedestal 32 with a carriage and is movable. A container valve 33 is attached to the opening of the cylinder 31, and one end of a flexible hose 35 is attached to the valve 33 via a joint 34. And this flexible hose 35
The other end of is connected to the injection valve unit 7 via a joint 36,
The injection valve unit 7 is connected to the injection unit 8. Injection valve unit 7,
The structure and function of the injection mixing cylinder portion 8 are as shown in FIGS.
The injection valve unit 7 and the injection mixing cylinder unit 8 used in the above-described portable embodiment shown in FIG.

That is, in this stationary cooling device 30, the lever 9 can be moved while supporting the injection valve portion 7 and the injection mixing cylinder portion 8 with one hand, and the lever can be moved while the tip of the injection mixing cylinder portion 8 is directed to the cooling portion. It can be easily cooled while pressing 9.

[0033]

As described above, according to the cooling device of the present invention, the cylinder having the liquefied carbon dioxide gas is equipped with the injection valve having the injection port, and the injection port has the air intake opening on the peripheral wall. And a mixing cylinder having an opening at the front end in the longitudinal direction is mounted.
Therefore, the temperature of the cooling device can be controlled quickly and surely by an easy operation, and the cooling device is excellent in safety.

Further, by arranging a porous body at the opening of the tip of the mixing cylinder, a gradual flow of cold air can be obtained.
Further, the safety is improved. Further, at the tip opening of the mixing cylinder,
By arranging a mixing nozzle, which has a plurality of vent holes around the ejection hole that communicates with the nozzle pipe connected to the injection port of the injection valve, the liquefied carbon dioxide gas is accompanied at the injection port. The air can be mixed effectively, the temperature of the spray gas can be controlled more reliably, and frost and ice particles are not scattered toward the affected area during spraying.

[Brief description of drawings]

FIG. 1 shows an embodiment of a cooling device of the present invention, and is an external view of a small cylinder direct connection type cooling device.

2A and 2B show a state in which a cylindrical body of a blowing nozzle is attached to an injection port of an injection valve mechanism section, FIG. 2A is a perspective view, and FIG. 2B is a sectional view in the axial direction of the cylindrical body.

FIG. 3 shows the outer cylinder of the blowing nozzle,
(A) is a perspective view, (b) is an axial sectional view of the outer cylinder.

4A and 4B are cross-sectional views in a circumferential direction showing a state in which an outer cylinder is attached to a cylindrical body of a blowing nozzle, where FIG. 4A is a state in which the opening degree of the opening is fully closed, and FIG. Indicates.

FIG. 5 is a sectional view of the cylindrical body in the axial direction, showing how the injection portion is attached to the injection valve mechanism portion.

FIG. 6 is a perspective view showing a state in which a cylindrical body and a tip end portion fitted into the cylindrical body are attached to an injection valve.

FIG. 7 is a perspective view of the tip end portion as viewed from the tip end surface (jet port forming surface).

FIG. 8 shows an embodiment of the cooling device of the present invention, and is an external view of a stationary cooling device.

FIG. 9 shows an example of a conventional cooling device.

FIG. 10 shows an example of a conventional cooling device.

[Explanation of symbols]

 5 Cooling Device 6 Cylinder 7 Injection Valve 8 Injection Mixing Cylinder 10 Injection Port 11 Cylindrical Body 12 Ring Cylinder 13 Opening 16 Protrusion 20 Mixing Nozzle 21 Injection Port 22 Spouting Hole 23 Cooling Device 31 Cylinder S Injection Nozzle

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takashi Masuda 1-16-7 Nishi-Shimbashi, Minato-ku, Tokyo Inside Nihon Oxygen Co., Ltd.

Claims (4)

[Claims] 1. A cylinder, which is filled with liquefied carbon dioxide, is equipped with an injection valve having an injection port, and the injection port is provided with an air intake opening on a peripheral wall and an opening at a longitudinal end. A cooling device which is equipped with a mixing cylinder formed by. 2. A mixing nozzle, in which an ejection hole communicating with a nozzle tube connected to an injection port of an injection valve is arranged at the center of the mixing cylinder tip opening, and a plurality of ventilation holes are arranged around the ejection hole. The cooling device according to claim 1, wherein 3. The cooling device according to claim 2, wherein the outflow side surface of the mixing nozzle forms a conical recess having a central ejection hole at the top. 4. An end portion of a nozzle tube connected to an ejection port of an ejection valve is arranged so as to penetrate an ejection hole arranged at the center of a mixing nozzle and project from an outlet end. The cooling device according to 3.