JPH0131215Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention is for spraying low-temperature gas onto the desired affected area or skin for joint disorders caused by rheumatoid arthritis or for skin beauty. This invention relates to a low-temperature gas injector that can be easily used.

[Conventional technology]

As is known, low-temperature gas (-100°C) is sprayed on areas affected by rheumatoid arthritis or skin that is required for cosmetic purposes to stimulate the area and improve blood circulation, thereby improving treatment and beauty effects. What is being done is what we are trying to do.

However, such injection treatment devices and beauty devices are devices manufactured for commercial use in hospitals, clinics, or beauty salons, and are equipped with highly accurate temperature control mechanisms and flow rate control mechanisms. The variable range of the flow rate is wide and the precision is high.
It has become possible to take treatments and cosmetic measures adapted to various conditions.

For this reason, it is large and expensive, and its operation is complicated and requires skill.As a result, it is practically impossible to use it easily at home, not only from an economic standpoint but also from an operational and handling perspective.

Furthermore, in the case of the above-mentioned existing equipment, during the process of pumping the low-temperature liquefied gas from the cylinder into the specified pipe, the fluid is forcibly evaporated by heating with a heater etc. If the flow rate of low-temperature liquefied gas increases suddenly, there is a risk that not all of the liquefied gas will evaporate and some of it will be ejected from the nozzle as droplets. In such a case, frostbite may occur. This will involve the risk of

In addition, this device uses liquid nitrogen as a refrigerant to indirectly cool the air and blow out the cooled air, or gasifies only liquid nitrogen and blows it out to enrich the treatment room with nitrogen. In order to avoid the risk of water damage, methods such as mixing gaseous oxygen with the low-temperature nitrogen gas and blowing it out are carried out, but since the air and gaseous oxygen mentioned above contain moisture, As a result, the moisture freezes, which tends to impede the flow of low-temperature gas and damage various components due to freezing.

In order to improve the defects of the above-mentioned conventional examples, as in Japanese Utility Model Application Publication No. 59-44539, a heater is disposed at the bottom of a metal thermos flask and in the liquefied refrigerant stored in the thermos flask. It has also been proposed that the liquefied refrigerant is heated and vaporized using this heater, but in this case, the low-temperature refrigerant gas obtained by heating the liquefied refrigerant with the heater is heated. After passing it through a long hose and heating it appropriately, if it does not squirt to the desired affected area, the temperature will be too low.
There are problems such as the need to increase the current supplied to the heater.

[Problem that the invention attempts to solve]

The present invention aims to solve the above-mentioned conventional problems and provide a low-temperature gas injector that can be used at home. By appropriate relative arrangement of electric heater and low temperature liquefied gas,
The structure is designed to prevent the refrigerant from being entrained in the form of droplets, so that it can be easily operated by any person, there is no risk of frostbite, and the outside air cannot enter into the container containing the refrigerant. This eliminates problems such as cutting off the low-temperature gas supply due to freezing, and furthermore, the heat generating part of the electric heater is placed inside the exterior pipe, rather than being directly immersed and fixed in a predetermined position in the liquefied refrigerant. By arranging the heat generating part at an appropriately low level and by passing this armored pipe through the gas phase part above the liquefied refrigerant, the refrigerant gas in the gas phase part that has evaporated from the liquefied refrigerant in advance can be transferred to the exterior pipe. so that the temperature can be raised by heating,
In addition to making it easier to supply refrigerant gas at the optimum temperature to the affected area, the exterior tube can be raised and lowered to change the position of the heat generating part, making it easy to adjust the temperature of the refrigerant gas to the heat generating part. The aim is to allow fine adjustments or large changes in the supply current without having to adjust it.

[Means for solving problems]

In order to achieve the above object, the present invention stores a liquefied refrigerant such as liquid air in an airtight insulated container with a gas outlet open, and also stores a liquefied refrigerant such as liquid air in the insulated container, which can be raised and lowered while maintaining airtightness. The exterior tube of the electric heater penetrated in this manner is immersed in the liquefied refrigerant from the gas phase above the liquefied refrigerant, and a heat generating part to which electric current can be freely supplied from the outside is arranged in the lower end of the exterior tube. A low-temperature gas injector may be provided, in which the lower end is arranged near the bottom of the heat-insulating container, and a heat exchange tube having a low-temperature gas injection nozzle at the tip is connected to the gas outlet. It is something that

[Effect]

Since the present invention is configured as described above, simply by energizing the electric heater, the liquefied refrigerant such as liquid air is heated according to the output of the heater, and the refrigerant near the heat generating part turns into bubbles. This floats in the liquefied refrigerant and evaporates into the gas phase of the heat insulating container, but at this time, the refrigerant gas in the form of bubbles is cooled by the floating refrigerant, so the refrigerant gas that evaporates into the gas phase becomes liquid. The temperature will be close to the boiling point (-194°C) of air, etc., and this will be ejected from the low-temperature gas injection nozzle via the heat exchange tube.

Therefore, the refrigerant gas at a temperature close to the above boiling point is first heated in the gas phase penetrating portion of the exterior tube that is heated in the heat generating section, and then further heated depending on the length of the heat exchange tube. The passing low-temperature gas is heated by the outside air, and as a result, the low-temperature gas that entered at a temperature close to the boiling point as mentioned above is ejected at a desired temperature range of -100°C to -130°C. becomes.

In addition, when the electric heater is not in use and is not energized, a very small amount of refrigerant evaporates into the gas phase and leaks from the low-temperature gas injection nozzle. Therefore, the heat exchange tube and the low temperature gas injection nozzle will not be clogged due to freezing of the air.

〔Example〕

To describe the present invention in detail with reference to the illustrated embodiment, a heat insulating container 1 containing a liquefied refrigerant A such as liquid air
The container body 1a is made of a synthetic resin material or a desired heat-insulating laminated layer, and the synthetic resin cap 1b is fitted onto the neck portion 1' of the container body 1a.
In order to keep the inside airtight, an O-ring 2 fitted inside the cap 1b is pressed against the neck 1'.

The cap 1b has a fitting hole 3 penetrating through its ceiling, and a gas outlet 4 protruding from its circumferential side. It is installed so that it is immersed in A.

The electric heater 5 shown here includes a metal cladding tube 6a with an exterior tube 6 disposed at the bottom, and an upper insulating bushing made of a material with poor thermal conductivity such as synthetic resin that is fitted over the metal cladding tube 6a and fixed with adhesive etc. 6b, the bushing 6b is fitted into the fitting hole 3, and the O-ring 7 in the hole 3 is inserted into the bushing 6b.
The flange 6 of the heat insulating bushing 6b is pressed against it to maintain the airtightness of the heat insulating container 1.
By pushing the bushing 6b until b' comes into contact with the ceiling of the cap 1b, the lower end 6a' of the metal cladding tube 6a is brought into contact with the bottom 1' of the heat insulating container 1.
so that they are placed nearby.

Furthermore, a lead wire 11 externally equipped with a controller 10 having a plug 8 and a switch 9 is inserted into the exterior pipe 5, and a heat generating part 12 such as a heating wire is connected to the lower end of the lead wire 11. However, the heat generating portion 12 is disposed within the lower end portion 6a' of the cladding tube 6a.

Here, the inside of the metal cladding tube 6a can be filled with an inorganic insulating material (not shown).
Reference numeral 3 denotes a seal plug fitted into the upper end opening of the cladding tube 6a, and the lead wire 11 that has passed through this plug passes through the heat insulating bushing 6b and extends to the outside. insulation plug 14
It is best to keep it closed.

A temperature sensor 15 is connected to the controller 10 by a connecting wire 16, which is installed at a high point directly above the heat generating part 12 at the lower end 6a' of the metal cladding tube 6a. When detected, the switch 9 is automatically opened.

Next, a heat exchange tube 18 having a low-temperature gas injection nozzle 17 attached to the tip is connected to the gas outlet 4 of the cap 1b, and it is preferable to use a flexible tube for the tube 18.
Reference numeral 9 indicates a fastener that fixes the tube 18 to the gas outlet 4, and in the embodiment shown in FIG. 2, the heat exchange tube 18 is only a flexible tube as shown in FIG. Instead, a metal finch tube 20 made of a metal material with good heat conduction such as copper or aluminum is connected between the tube and the gas outlet 4, and the gas outlet 4 and the finch tube 20 are connected. The tube 20 and the flexible tube are fixed by a fastener 21 by screwing, and in the figure, 20', 20'...
shows the heat dissipation fins of the same tube.

Therefore, to use this, all you have to do is insert the plug 8 into the outlet and close the switch 9, which heats the heat generating part 12 and vaporizes the liquefied refrigerant A. Part 1
The output of No. 2 is determined in advance in accordance with the amount of low-temperature gas to be jetted from the low-temperature gas injection nozzle 17.

As a result, the liquefied refrigerant A in the vicinity of the heat generating part 12 is heated and bubbles a, a, etc. are generated, and while they rise, they are cooled by the refrigerant A, and then proceed to the gas phase part B of the heat insulating container 1, where they are heated. After being heated by the heated exterior tube 6, it passes through the heat exchange tube 18 and is ejected from the low temperature gas injection nozzle 17. At this time, while passing through the tube 18, it is heated by the outside air. Since the gas has reached the desired temperature, the low-temperature gas from the low-temperature gas injection nozzle 17 can be manually sprayed onto the affected area or desired skin.

Therefore, if the heat exchange tube 18 shown in FIG. 2 is adopted, the overall length can be shortened due to the presence of the metal finch tube 20 when heating low-temperature gas to a desired temperature. .

Also, when not in use, the power supply to the heat generating part 12 is of course cut off, but even in this state, only a small amount of refrigerant evaporates, and the low temperature gas flows out from the low temperature gas injection nozzle 17, so the outside air is the same. It does not flow into the heat insulating container 1 from the nozzle 17.

By repeatedly treating the affected area in this way, the liquefied refrigerant A is consumed and its liquid level gradually decreases, but in the illustrated example, the temperature sensor 15 to 12
The same sensor 1 is installed at a higher level to detect the high temperature state caused by the liquid level falling below this level.
5 actuates the controller 10 to automatically open the switch 9.

In the present invention, as shown in the illustrated example, the heat insulating bushing 6b pressed through the O-ring 7 is movable up and down, so that the refrigerant A of the heat generating part 12
Since the immersion depth can be adjusted,
This makes it possible to adjust the temperature of the low-temperature gas entering the gas phase part B, and by simple lifting and lowering operations,
It is possible to fine-tune the refrigerant gas temperature and achieve large temperature changes while keeping the current supply to the heat generating part unchanged.

[Effect of idea]

Since the present invention is constructed as described above and can be embodied as described above, it does not require the installation of precise control equipment, so it can be made small and inexpensive, and its operation can be done by simply turning on and off a switch. Therefore, patients can easily use the refrigerant at any time for general household use, and the liquefied refrigerant stored in the insulated container remains stationary without flowing, and the heat generating part of the electric heater is immersed in it. There is no fear that the liquefied gas will flow out as droplets from the low-temperature gas injection nozzle, and the risk of frostbite can be eliminated.

Moreover, since the heat generating part is located at the lower level, low temperature gas with a temperature close to the boiling point of the liquefied refrigerant is always obtained in the gas phase, and this is first heated in the gas phase by the outer tube of the electric heater. After the temperature is raised, it flows into the heat exchange tube, making it easier to supply refrigerant gas at the optimal temperature to the affected area without making the tube longer. Therefore, the degree of heat exchange can be adjusted depending on the length of the heat exchange tube. By adjusting the
Low-temperature gas at a temperature suitable for the skin can be ejected without any troublesome adjustment operations.

In addition, in this invention, the outer tube of the electric heater can be moved up and down, so the position of the heat generating part can be changed freely.As a result, the temperature of the refrigerant gas can be finely adjusted without increasing the supplied current. , it is possible to make a significant change.

Furthermore, since the small amount of low-temperature gas that evaporates is released from the low-temperature gas injection nozzle even when not in use, there is no need to worry about internal pressure rising, and since outside air does not enter the insulated container, freezing of the low-temperature gas flow path occurs. There is no need to worry about any blockage caused by this.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional front view showing one embodiment of the low temperature gas injector according to the present invention, and FIG. 2 is a partial longitudinal sectional front view showing another embodiment of the heat exchange tube in the same device. 1...Insulated container, 1'...Bottom of the insulated container, 4
...Gas outlet, 5...Electric heater, 6...Exterior tube, 6a...Metal clad tube, 6a'...Lower end, 6b
...Insulating bushing, 12...Heating part, 17...
Low temperature gas injection nozzle, 18... heat exchange tube, 20... metal finch tube, A... liquefied refrigerant.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A liquefied refrigerant such as liquid air is stored in an airtight insulated container with a gas outlet open, and a liquefied refrigerant such as liquid air is stored in the insulated container so that it can be moved up and down while maintaining airtightness. The exterior tube of the electric heater, which is penetrated freely, is immersed in the liquefied refrigerant from the gas phase above the liquefied refrigerant, and the lower end of the exterior tube has a heat-generating section to which electric current can be freely supplied from the outside. A low temperature gas injector, the lower end of which is disposed near the bottom of a heat insulating container, and the gas outlet is connected to a heat exchange tube having a low temperature gas injection nozzle at its tip. (2) The exterior tube of the electric heater consists of a metal clad tube immersed in liquefied refrigerant and a heat insulating bushing connected above the metal clad tube and penetrating the heat insulating container.Claim 1 of the Utility Model Registration Claim Cryogenic gas injector as described. (3) The low temperature gas injector according to claim 1, wherein the heat exchange tube is formed by a flexible tube or a connection of a flexible tube and a metal finch tube.