JPS61120614A - Oxygen enriching apparatus - Google Patents

Abstract

PURPOSE:To supply oxygen enriched air with stable oxygen concn. in a constant high flow amount, by heating a permselective cell to constant temp. by heat generated in the vacuum means below the permselective cell. CONSTITUTION:A vacuum pump 6 is positioned almost directly under a permselective cell 3 through a heat conductive partition plate 23. This partition plate 23 transfers heat generated in a vacuum pump 6 while prevents the cooling of the vacuum pump 6 by air flowing through an air passage 20 reaching an exhaust port 19 from a suction port 18 by the action of a diffusion fan 17 as a blower means 20. The heat generated by the vacuum pump 6 is stable at about 30 deg.C and transferred to the partition plate 23 to hold the permselective cell 3 to almost constant temp. As a result, the temp. of air supplied to a permselective membrane 2 becomes stable and the oxygen concn. and flow amount of oxygen enriched air passing through the permselective membrane 2 becomes constant.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an M-line enrichment device that can enrich and supply oxygen in the air by utilizing a selectively permeable cell that allows oxygen to permeate at a higher rate than nitrogen. Regarding four.

Conventional Example** and its Problems In recent years, medical oxygen supply II stomachs, which are used for oxygen therapy for patients with various respiratory and circulatory system diseases, have been using liquid oxygen produced in cryogenic separation plants in high-pressure cylinders. and the terminal s
Generally, the method of transporting high-pressure cylinders to the ummium field and storing them is taken, but bringing high-pressure cylinders into the medical diagnosis field or at home poses problems in terms of storage safety, regular inspections, and stable supply. There is a growing need for oxygen enrichment devices as small-sized oxygen supply devices in place of liquid oxygen.

Hereinafter, a conventional oxygen enrichment device will be explained with reference to the drawings.

In Figure 12, 1 is a casing, 2 is a selective passage membrane that selectively enriches oxygen, 3 is a selectively permeable cell containing this selectively permeable cell 112, 4 is a vacuum gauge that measures the degree of vacuum in the selectively permeable cell 3, 5 is a first conduit that communicates with the cell 3; 6 is a vacuum pump as a vacuum means for evacuating the permselective cell 3; 7 is a 26th pipe that carries Shun'M-enriched air from the vacuum pump 6; 8 is a heat exchanger that cools oxygen-enriched air to condense water therein; 9 is a water separator that separates water condensed by this heat exchanger 8; 1;
0 is a wick tube that carries condensed water using capillary action, 11 is an evaporator that evaporates the water carried by the wick tube 10, and 12 is a wick tube that carries oxygen-enriched air after separating the condensed water. 3 conduit, 13 is a bacteria filter that removes pollutants and bacteria from oxygen-enriched air, and 14 is a flow 1w4 that adjusts the level of oxygen-enriched air.
Control valve, 15 is a flow meter that indicates the amount of oxygen-enriched air, 1G
is a take-out for taking oxygen-enriched air to the outside of the device [], 1
7. A diffusion fan 2 is located in an air passage 20 extending from an intake port 18 provided in the casing 11 to one exhaust port, and serves as a blowing means for supplying new air to the selective permeation cell 3.
1 is a protective filter located at the intake port 18 to remove dust from the inhaled air; 22 is a vertical thermal barrier that separates the permselective cell 3 and the vacuum pump 6;
It is a scattered board.

The operation of the oxygen enrichment device having the above configuration will be described below. First, selective transparency #! 2 allows oxygen to permeate at a higher rate than nitrogen, and in the selective permeation cell 3,
First guide! ! By operating the vacuum pump 6 which communicates through the membrane 5, a pressure difference is created between the inside and outside of the selectively permeable membrane 2, and oxygen-rich air is introduced into the cell 3. This oxygen-enriched air is conveyed to a heat exchanger 8 via a first conduit 5 and a second fathom tube 7. Moisture in the air that has been cooled and condensed by the heat exchanger 8 is separated into moderately dry air and water by the water separator 9, and this separated water is passed through the wick tube 10 using capillary action. evaporator [11
transported to and evaporated. In addition, the appropriately dried oxygen-enriched air passes through the third conduit 12, passes through the bacteria filter 13 that removes dirt and bacteria, and passes through the flow meter 15 that measures the amount of oxygen-enriched air) to the outlet 1G. For example, the air is supplied outside as 40% oxygen-enriched air.

The vacuum gauge 14 indicates the differential pressure between the inside and outside of the selectively permeable membrane 2, and the diffusion fan 11 constantly supplies fresh air to the selectively permeable membrane 2 through the filter 21, and supplies nitrogen-rich air through one exhaust port. Exhaust outside the device. Selective transparency!
As shown in FIG. 3, the flow rate of l142 (consisting of 4-methylpentene-1 in this example) increases as the m degree increases. On the other hand, as shown in Figure 4, as the m degree increases, the oxygen concentration decreases somewhat, but the advantage in terms of oxygen enrichment is that
Higher temperatures are preferred. However, if the temperature is too high, the selectively permeable membrane cell 3 will become soft, damaged or deteriorated, so the heat resistance of the selectively permeable membrane 82 will be affected.
It will be 1llll. Furthermore, the temperature characteristics of the selective transmission 112 are as follows:
It is material specific.

However, in the conventional configuration, since the selectively permeable cell 3 and the vacuum pump 6 are separated by a vertical thermally insulating shield plate 22, the heat generated by the vacuum pump 6 is transferred to the selectively permeable cell 3 and the vacuum pump 6.
1'J2 cannot be used to raise the temperature to a temperature at which it can function advantageously, and the selectively permeable membrane 2 is directly affected by changes in outside temperature, resulting in a stable l! There was a drawback that it was not possible to always supply oxygen-enriched air with a stable flow rate and a concentration of two elements.

OBJECTS OF THE INVENTION The present invention solves the above-mentioned conventional drawbacks, and aims to provide an oxygen enrichment device that can constantly supply oxygen-enriched air with a constant high flow rate and a stable oxygen content of 11 degrees Celsius. purpose.

Structure of the Invention In order to achieve the above object, the oxygen enrichment device of the present invention has the following features:
An air passage leading from the intake port to the exhaust port is provided in the casing, a blowing means is installed in this air passage, and a selective permeation cell that allows oxygen to permeate at a higher rate than nitrogen is provided,
An oxygen enrichment device in which the permselective cell is communicated with an oxygen-enriched air outlet through an enrichment passage provided with a vacuum means in the middle, the vacuum means being located below the permselective cell. The selective permeation cell is heated to a substantially constant degree by the heat generated by the vacuum means.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. In this figure, the same reference numerals are given to the members having the same functions as those in FIG. 2, and the explanations will mainly focus on the differences in arrangement, avoiding duplication of explanation of the functions.

In FIG. 1, a permselective cell 3 and a vacuum pump 6 as a vacuum means are vertically arranged in a casing 1, and the vacuum pump 6 is located almost directly below the permselective cell 3. A thermally conductive partition plate 23 is arranged between the vacuum pump 6 and the selective permeation cell 3, and this partition plate 23 allows air to flow from the intake port 18 to the exhaust port 19 by the action of the diffusion fan 1γ as a blowing means. The heat generated by the vacuum pump 6 is transmitted to the cell 3 while preventing the air flowing through the air passage 20 from cooling the vacuum pump 6. Further, a thermally insulating shielding plate 24 is provided between the vacuum pump 6 and the intake port 18, and a heat exchanger 8 and a water separator 9 are arranged on the intake air 018 side of this shielding plate 24. . Note that 25 is a soundproof and vibration-proof sheet that prevents noise generated from the vacuum pump 6;
6 is a vibration isolating pad that prevents vibration of the vacuum pump 6; 21 is a vibration spring that prevents vibration of the vacuum pump 6; and 28 is W1.
Casters are attached to the lower end of the casing 1 in order to move the enrichment device freely; 29 is a filter cover for covering the protective filter 21; 30 is an exhaust port 19;
It is a louver installed in.

In the oxygen enrichment device having the above configuration, the heat generated by the vacuum pump 6 is stable at around 30° C., and this heat is transmitted through the partition plate 23 to keep the permselective cell 3 at a substantially constant temperature.

As a result, the 4 degrees of air supplied to the selectively permeable membrane 2 becomes stable, the oxygen concentration and flow m of the oxygen-enriched air passing through the selectively permeable membrane 1/IA2 become constant, and the air flow rate increases.

Since the heat exchanger 8 and water separator 9 are more efficient when cold air enters them, the heat insulating shield plate 24 cuts the heat generated by the vacuum pump 6 to the heat exchanger 8 and water separator 9. do.

In addition, two of the shielding plates 24 and the sound-proof and vibration-proof sheets 25 are fake, and the device! The front section is soundproofed. Furthermore, the partition plate 6
It also has a soundproofing effect.

Effects of the Invention As described above, in the oxygen enrichment device of the present invention, the vacuum means is located below the permselective cell, and the permselective cell is heated by the heat generated there. This has the effect of constantly supplying oxygen-enriched air with a high flow rate and a stable oxygen concentration.

[Brief explanation of the drawing]

FIG. 1 shows an oxygen enrichment device according to an embodiment of the present invention.
2 is a cross-sectional view of the conventional oxygen enrichment @ so-called llllIi diagram, FIG. 3 is a graph showing the temperature/permeation flow filtration of the selectively permeable membrane, and FIG. 4 is the temperature r of the selectively permeable membrane. ! 1.
/ is a graph showing oxygen concentration characteristics. DESCRIPTION OF SYMBOLS 1... Casing, 2... Permselective membrane, 3... Permselective cell, 5, 7.12... Conduit forming an enrichment passage, 6... Vacuum pump (vacuum means), 18 ...Intake port, 19゛...Exhaust port, 20...Air passage, 23.
...Thermal conductive partition plate. Agent Yoshihiro Moriki Figure 1 Figure 2 Figure 3 Temperature

Claims (1)

[Claims] 1. An air passage leading from the intake port to the exhaust port is provided in the casing, and a blowing means is provided in this air passage, and a selective permeation cell that allows oxygen to permeate at a higher rate than nitrogen is provided, and a vacuum means is provided in the middle. An oxygen enrichment device comprising: the permselective cell communicating with an oxygen-enriched air outlet through an enrichment passageway, the vacuum means being located below the permselective cell; An oxygen enrichment device configured to heat a selectively permeable cell to a nearly constant temperature using the heat generated.