JPH0217620Y2 - - Google Patents

Description

[Detailed description of the invention] The present application is an extremely small oxygen concentrator that reduces the overall size and weight of the device, and stably supplies oxygen-enriched gas as a product with minimal pressure fluctuations. The present invention provides an adsorption tower in a small oxygen concentrator for the purpose of

This application describes a small-sized adsorption type oxygen concentrator, in which the outside of the adsorption tower filled with nitrogen and moisture adsorbents is a buffer tower that is not filled with anything, and the double pipe is connected with two upper and lower flanges to prevent gas leakage. Install two towers in parallel, sandwiching them with bolts or long screws, etc., to ensure that they are not exposed, connect the two buffer towers with a conduit, and connect the gas inlet and outlet of the one tower that is not connected with the conduit to the product gas inlet. This invention relates to an adsorption column in a small oxygen concentrator in which the gas inlet and outlet of the other tower is used as the product outlet.

To explain the entire small oxygen concentrator based on the flow sheet of Fig. 1, the air compressor 1 has an on-off valve 3,
The adsorption columns 5, 5' are connected by a conduit 2 via the pipe 3'.
Check valves 10, 10' and on-off valves 8, 8' are connected in parallel to the other ends of the adsorption towers 5, 5' through conduits 6, 6' and conduits 7, 7', respectively.

The on-off valves 8, 8' are connected to the outlet side of the precision flow control valve 13 via conduits 11, 11'. Check valve 10,1
0' is connected to the inlet side of the check valve 14 by conduits 12, 12', and the inlet side of the precision flow rate control valve 13 is connected to the end portion 9 of the conduits 12, 12'. Check valve 14
Buffer tank 16, on/off valve 17, pressure reducing valve 1
8. The flow regulating valve 19 and the flow meter 20 are connected in series through the conduit 15.

21 indicates an outlet conduit.

Next, to explain the adsorption regeneration process, raw air gas is compressed by an air compressor 1 and sent from a conduit 2 through an on-off valve 3 to an adsorption tower 5 that adsorbs nitrogen and moisture. is sent via conduit 6 through check valves 10 and 14 and through conduit 15 to the buffer tank. Oxygen-enriched gas is supplied from the buffer tank 16 to the on-off valve 17 and the pressure reducing valve 1.
8. Product gas is sent out through a flow rate control valve 19 and a flow meter 20. This is called the adsorption process. On the other hand, the oxygen enriched gas is supplied from the conduit 12 to the precision flow control valve 13.
It passes through conduit 11', on-off valve 8', and conduit 7', and is sent to adsorption tower 5', where the adsorption of nitrogen and moisture has been saturated until then, and the adsorption of nitrogen and moisture in adsorption tower 5 becomes saturated. During this time, the adsorption column 5' is cleaned with the product oxygen-enriched gas so that it can be used again for adsorbing nitrogen and moisture, and is discharged into the atmosphere together with the adsorbed nitrogen and moisture via the on-off valve 4'. This is called the regeneration process. The adsorption process and regeneration process are repeated at regular intervals.

The present application is based on the improvement of the adsorption towers 5, 5' and the buffer tank 16 that perform the adsorption process and the regeneration process. Two of each are formed, and the buffer cylinders b and adsorption cylinders a are formed to have the same length. Separately, four flanges c with a larger diameter than the larger buffer cylinder b are formed, and a circular groove d, in which the buffer cylinder b can be airtightly fitted, is formed on one side of the flange c, jointly with the four flanges c. engraved in position.

Inside the groove d, a circular groove e into which a small suction tube a can be fitted is carved eccentrically from the groove d, and large and small O-rings f and g are fitted into each groove d and e. A hole h is bored at the center of the groove e to connect the conduits 2, 2' and 6, 6' or 7, 7'.

A hole i for connecting the conduit 15 is bored at the widest point of the interval l formed by the eccentric grooves d and e.

Bolt insertion holes j are bored in the four corners of the flange c. Fit the O-rings f and e into the grooves d and e of the flange c, and then fit the O-rings f and e into the groove d of the two flanges c.
and e, double the suction tube a and buffer tube b and fit one end thereof, and insert the remaining flange c into the grooves d and e at the other end of the suction tube a and buffer tube b, respectively.
, insert bolts k into bolt insertion holes j at the four corners, and tighten and secure with nuts m.

Before tightening, the adsorption cylinder a is filled with a zeolite-based crushed nitrogen adsorbent, an alumina-based moisture adsorbent, or the like.

The holes j at the bottom of the buffer cylinders b of the two adsorption towers 5 and 5' are connected to each other by a conduit 15 using a conduit joint, etc., and the hole i at the top of the buffer cylinder b of one of them is
Connect the conduit 15 for the outlet of the product oxygen-enriched gas to the adsorption cylinder b to the hole i in the upper part of the remaining buffer cylinder b.
A conduit 15 for feeding oxygen-enriched gas from is connected.

The conduit 2 is connected to the hole h in the lower part of the adsorption cylinder a, and the conduit 2 is connected to the hole h in the upper part.
The conduit 6 is connected to.

As described above, the present application is an adsorption tower in which a buffer cylinder is fitted on the outside of an adsorption cylinder filled with nitrogen and moisture adsorbents to form a double cylinder, and the top and bottom of the double cylinder are airtightly sealed with lids. Two adsorption towers are installed in parallel, and the bottoms of the buffer tubes of the two adsorption towers are connected to each other by a conduit, and the gas inlet and outlet at the top of one buffer tube, which is not connected by the conduit, is used as the product gas inlet, and the upper part of the other buffer tube is connected to the product gas inlet. Since the gas inlet/outlet is used as the product gas outlet, the volume of the buffer cylinder can be increased, and pressure fluctuations in the product gas can be reduced, so the product gas can be stably supplied.

[Brief explanation of the drawing]

Figure 1 is a flow sheet diagram of the entire small oxygen concentrator, Figure 2 is a plan view of the flange, Figure 3 is a sectional view of the same, Figure 4 is a sectional view of the bolt insertion hole, and Figure 5 is the adsorption tower. The perspective view and FIG. 6 are perspective views with the same part removed.

Claims (1)

[Scope of utility model registration request] A buffer cylinder is fitted to the outside of the adsorption cylinder filled with nitrogen and moisture adsorbent to form a double cylinder, and two adsorption towers are installed in parallel, the top and bottom of the double cylinder being airtightly sealed with lids, The lower parts of the buffer cylinders of the two adsorption towers are connected to each other by a conduit, and the upper gas inlet and outlet of one buffer cylinder that is not connected by the conduit is used as the product gas inlet, and the upper gas inlet and outlet of the other buffer cylinder is used as the product gas outlet. An adsorption tower in a small oxygen concentrator, characterized by comprising: