KR960006763Y1 - Cool air generator - Google Patents

Abstract

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Description

Low temperature air generator

1 is a system diagram showing an embodiment of a low temperature air generator according to the present invention.

* Explanation of symbols for main parts of the drawings

1: Air Compressor 2: Drain Separator

3: drying device 4: pressure gauge

5a, 5b: branch pipe 6a, 6b: pressure reducing valve

7a, 7b: flow meter 8a, 8b: solenoid valve

9a, 9b: heater 10a, 10b: heat exchanger

11a, 11b: Pneumatically operated valve 12a, 12b: Temperature controller

13a, 13b: temperature sensor 14a, 14b: insulation pipe

l5a, 15b: Operation panel 16a, 16b: Flexible hose

17a, 17b: nozzle 18: liquefied gas storage container

19 valve 20 pressure gauge

21: heat insulation pipe 22: branch insulation pipe

23: liquid nitrogen (low temperature liquefied gas) 24a, 24b: tube

25: warmer (加溫 器)

The present invention relates to a low temperature air generator that cools air with low temperature liquefied gas such as liquid nitrogen and supplies it as low temperature air.

It is well known that low temperature air is used as a low temperature treatment or low temperature cosmetic method such as rheumatism, shoulder pain, low back pain, or for cooling a cutting knife or cutting knife for machining.

The low temperature air used for these uses is required of very low temperature in order to acquire the cooling effect.

For this reason, since cold air produced by a generally used mechanical refrigerator is insufficient, use of low temperature liquid gas such as liquid oxygen and liquid nitrogen is preferable, and cold air used for low temperature therapy and low temperature beauty treatment is usually low temperature liquefied gas. Is used.

Conventionally, as a method of obtaining low temperature air using a low temperature liquefied gas,

① Method of vaporizing liquid air obtained by liquefaction apparatus

② A method of making liquid air by mixing liquid oxygen and liquid nitrogen to form a composition of air, and vaporizing it, or

(3) A method of cooling air by low temperature liquefied gas such as liquid nitrogen and making it into low temperature air has been proposed.

Among them, the method of making and evaporating the liquid air of ① and ② involves a risk because it is difficult to maintain the composition of the air due to the nature of the substance.

For this reason, the method of cooling and supplying air using the cold air of the low temperature liquefied gas of said (3) is used normally.

That is, after compressing air to a desired pressure, the impurities which solidify under low temperature, such as moisture contained, are removed, and then cooled by a low temperature liquefied gas in a heat exchanger.

As described above, low temperature air, particularly low temperature air supplied for low temperature treatment or low temperature beauty treatment, is obtained by a method of cooling air by low temperature liquefied gas, but this device configuration is compressed by a compressor or a blower. Or a means for blowing air, a means for removing the contained moisture to dry air, a heat exchanger, cooling means for heat-exchanging the dry air and the low temperature liquefied gas, and supplying means for consuming the obtained low temperature air.

Here, the low temperature air provided for the low temperature therapy or the low temperature beauty treatment method does not need a large capacity and is about 20 to 30 m 3 / h.

For this reason, in order to increase demand, it is common to add a device having the same capacity or to supply and consume low-temperature air obtained by a device having a large capacity.

However, the installation of a large number of relatively small capacities not only leads to an increase in equipment costs, but also a relatively high consumption of low temperature liquefied gas.

In addition, in the case of supplying a device having a large capacity and dividing the low-temperature air, there is a benefit that the equipment cost is relatively reduced, but there is a bad problem such as bringing the temperature rise of the low-temperature air supplied.

That is, in the use of the kind mentioned above, since it is normally divided into independent rooms (rooms which perform treatment or beauty etc.), it is supplied, and the supply system path | route thereof becomes naturally long, and sufficient insulation piping is carried out. Temperature rises cannot be avoided, and expensive piping equipment is required.

Moreover, there is a problem in that low-temperature liquefied gas cannot be reduced because it cannot easily cope with the fluctuation of demand.

As described above, the present invention solves the dissatisfaction in performing the low temperature treatment low temperature beauty treatment method, can be installed at a relatively low price, and the consumption of low temperature liquefied gas can be reduced, and also it can easily cope with fluctuations in demand. An object of the present invention is to provide a low temperature air generator.

The low temperature air generator according to the present invention includes a compressed dry air supply means having a compressor for compressing air to a desired pressure, a drying device for removing moisture, etc. in the compressed air, and a part provided in series with the compressed dry air supply means. A plurality of dry air distribution means each provided with a valve flow meter in the engine, and a plurality of dry air distribution means respectively connected to the plurality of dry air distribution means, the low temperature air generating means having a heat exchanger for cooling the supply drying air with low temperature liquefied gas; And a low temperature liquefied gas supply means for dividing the low temperature liquefied gas storage container and the low temperature liquefied gas in the storage container and supplying the low temperature liquefied gas to the respective low temperature air generating means.

Next, an embodiment of a low temperature air generator according to the present invention will be described with reference to the drawings.

In the drawing, reference numeral 1 denotes an air compressor, 2 denotes a drain separator installed in series with the air compressor 1, and 3 denotes a drying apparatus provided in series with the drain separator 2. For example, an adsorber filled with an adsorbent such as zeolite is used, and (4) is a pressure gauge provided between the air compressor 1 and the drain separator 2, whereby the compressed dry air supply means is constituted.

Several sets of dry air distribution means are branched and connected successively to this compressed dry air supply means.

In this embodiment, two sets of dry air distribution means are provided and branched to the system of A and B.

The dry air distribution means has the same configuration, one of which is connected to the branch pipe 5a branching from the drying device 3, and the booster valve 6a and the flow meter 7a formed on the branch pipe 5a. The other part is comprised with the branch pipe 5b, the pressure reduction valve 6b, and the flowmeter 7b formed in this branch pipe 5b similarly.

The above-mentioned dry air distribution means is provided with the low temperature air generation means of the system of independent (A) and (B), respectively.

The above-mentioned low temperature air generating means has the heat exchanger for cooling the compressed dry air supplied by heat-exchange with the low temperature liquefied gas described below, and is comprised similarly.

That is, one of the low temperature air generating means is constituted by a heat exchanger 10a which is connected to the branch pipe 5a via a solenoid valve 8a and a heater 9a, and the dry air flowing through the branch pipe 5a, It cools to about -150 degreeC in the heat exchanger 10a via the solenoid valve 8a and the heater 9a.

In addition, the other part is comprised as the heat exchanger 10b connected to the branch pipe 5b via the solenoid valve 8b and the heater 9b similarly.

Here, the heat exchangers 10a and 10b are insulated from the outer circumference, and the heat exchange system may be arbitrarily selected from a fin tube and a plate fin type.

11a and 11b are pneumatically actuated valves, 12a and 12b are temperature controllers, and 13a and 13b are temperature sensors.

The heat insulating pipes 14a and 14b respectively connected to the heat exchangers 8a and 8b are connected to the connection ports of the operation panels 15a and 15b, respectively, and the flexible hose 16a is connected to the connection ports. ) And 16b are respectively connected.

In addition, the operation panels 15a, 15b, and the hoses 16a, 16b are insulated from each other.

The low temperature air of about -150 ° C obtained by the low temperature air generating means is supplied from the heat insulating pipes 14a and 14b to the flexible hoses 16a and 16b, respectively, and the front ends of the hoses 16a and 16b. From the nozzles 17a and 17b formed at the end, it is injected to a desired place, respectively.

Next, the low temperature liquefied gas supply means for branching the low temperature liquefied gas and supplying the low temperature liquefied gas to each of the low temperature air generating means has the valve 19 and the pressure gauge 20 as main components. Branch heat insulating pipes 21 and branch heat insulating pipes 21 and branch heat insulating pipes 22a and 22b which are connected to the respective low temperature air generating means.

In the storage vessel 18 of the low temperature liquefied gas, for example, liquid nitrogen 23 is stored, and the liquid nitrogen 23 is led to the adiabatic pipe 21, and the valve 19 and the pressure gauge 20 are removed. Then, the branch heat insulating pipes 22a and 22b are introduced into the heat exchangers 10a and 10b through the pneumatic actuating valves 11a and 11b, respectively.

The introduction amount of the liquid nitrogen is that the temperature regulators 12a and 12b receive low-temperature air temperature detection signals from the temperature sensors 13a and 13b and adjust the pneumatic actuating valves 11a and 11b. Controlled.

As described above, the liquid nitrogen introduced into the heat exchangers 10a and 10b is heat-exchanged with the dry air as described above to cool the dry air, vaporize by itself, and after the temperature rises to near room temperature, the tube 24a. ) And (24b).

The nitrogen gas derived from the tubes 24a and 24b is released into the atmosphere, but may be lower than the atmospheric temperature, and a warmer 25 is provided as necessary from the problem of environmental conservation.

Referring to the operation of the low-temperature air generating device configured as described above, the air compressed to about 7kg / ㎠G in the air compressor (1), after removing a part of the moisture contained in the drain separator (2), drying device (3) ) And dried to a dew point of -40 ° C or below.

The dry compressed air is branched into the respective branch pipes 5a and 5b, and the pressure is reduced to 0.15 kg / cm 2 G or less by the pressure reducing valves 6a and 6b, and then the solenoid valve 8a, The heat exchangers 10a and 10b are introduced into the heat exchangers 10a and 10b via the heaters 8a and 9b, which are not operated at this time, and flow through the air flow paths in the heat exchangers 10a and 10b.

On the other hand, the liquid nitrogen 23 in the suit container 18 of the low temperature liquefied gas is led to the heat insulation pipe 21 at a pressure of about 8 kg / cm 2 G by the valve 19, and then the branch insulation pipe 22a. And 22b are introduced into heat exchangers 10a and 10b via pneumatically actuated valves 11a and 11b.

The liquid nitrogen 23 introduced into the heat exchangers 10a and 10b flows through the liquid nitrogen flow passages in the heat exchangers 10a and 10b, and heat-exchanges with the air flowing through the air flow passages to cool the air. After vaporizing and heating up by themselves, they are discharged from the tubes 24a and 24b to the atmosphere.

In the heat exchangers 10a and 10b, the low-temperature air cooled to about -150 ° C by liquid nitrogen is led to, for example, the heat-insulated pipes 14a and 14b that are vacuum-insulated, and the operation panel ( By operating 15a) and 15b, they are injected from the nozzles 17a and 17b via the flexible insulated pipes 16a and 16b.

At this time, the low temperature air temperature is preferably maintained at a desired constant temperature, which means that the temperature sensors 13a and l3b detect the low temperature air temperature, and the temperature controllers 12a and 12b are controlled by this signal. In between, the pneumatic actuating valves 11a and 11b are held by controlling the supply amount of liquid nitrogen.

When the apparatus is stopped by the end of the work or the like, the supply of the liquid nitrogen is stopped, and then the heaters 9a and 9b are operated to supply dry heated air to the heat exchangers 10a and 10b. .

This is done in order to discharge a small amount of water and the like remaining in the heat exchanger 10a, 10b, etc., which cannot be removed by the drying apparatus 3 to the outside of the system.

Next, if necessary, for example, when the low temperature air generation of the B system is stopped and only the A system is operated, the solenoid valve 8b and the pneumatic actuating valve 11b are closed, and air and liquid air to the B system are closed. Shut off the supply.

For this reason, the quantity of wind becomes naturally unnecessary for one unit, but it is comprised so that the suction amount of the air compressor 1 may fall automatically by the said apparatus.

In addition, the solenoid valve 8a, the pneumatic actuating valve 11a, the solenoid valve 8b, and the pneumatic actuating valve 11b may be closed to temporarily stop the generation of low temperature air in both systems.

The low temperature air generating device according to the present invention, as described above, comprises one set of compressed dry air supply means, a low temperature liquefied gas supply means, a plurality of sets of dry air distribution means, and a low temperature air generation means provided successively. Since it is configured in combination with, the effect which cannot be seen in the conventional apparatus can be obtained.

For example, in the case of low temperature therapy or low temperature beauty use, many sets of low temperature air generating means are usually required, but since the low temperature air generating device itself can be coped with, the cost of equipment is low.

In addition, if low-temperature air generating means is provided in each desired place, the piping from the compressed dry air supplying means to each of these generating means may be room temperature, so that it can be easily installed even in a remote place.

In addition, since there is a low temperature air generating means in the work place, there is no inconvenience such as temperature rise during use.

Claims (1)

In the branch pipes 5a and 5b which are successively provided by this compressed dry air supply means having an air compressor 1 for compressing air to a desired pressure and a drying device 3 for removing moisture in the compressed air. A plurality of dry air distribution means each having a pressure reducing valve 6a, 6b, a flow meter 7a, 7b, and A low temperature air generating means which is respectively installed in succession to said plurality of dry air distribution means, and has heat exchangers 10a and 10b for cooling the supplied dry air to a low temperature liquefied gas; Low temperature liquefied gas supply means for branching the low temperature liquefied gas storage container 18 and the low temperature liquefied gas 23 in the suit container 18 and supplying the low temperature liquefied gas 23 to each of the low temperature air generating means. Generator