KR100555771B1 - Vacuum swing absorption type oxygen generation device - Google Patents

Abstract

The present invention relates to a oscillating piston type nitrogen vacuum pump having a high degree of vacuum and a vacuum swing adsorption (VSA) type oxygen generator for exhausting oxygen and nitrogen with a low degree of diaphragm type oxygen vacuum pump that vibrates and pumps by magnetic force. will be.

Description

Vacuum swing adsorption type oxygen generator {VACUUM SWING ABSORPTION TYPE OXYGEN GENERATION DEVICE}

1 is a perspective view showing the appearance of a vacuum swing adsorption type oxygen generator according to a preferred embodiment of the present invention.

2 is a configuration diagram of FIG. 1.

Figure 3 is a perspective view showing a separate diaphragm type oxygen vacuum pump of Figure 1;

Figure 4 is a perspective view showing the separation of the oxygen vacuum pumping unit of FIG.

FIG. 5 is a side view illustrating the valve body of FIG. 4. FIG.

6 is a cross-sectional view showing the main part of FIG.

Figure 7 is a perspective view of the rubber cap.

<Explanation of symbols for the main parts of the drawings>

1: vacuum swing adsorption oxygen generator 3: housing

10: vibration diaphragm type oxygen vacuum pump

30: swinging piston type nitrogen vacuum pump

100: oxygen vacuum pumping unit 110: electromagnet

130: oxygen pump 140: valve body

141a, 141b: oxygen inlet 143: oxygen discharge port

145: valve seat 145a, 146a: suction valve

145b, 146b: Exhaust valve 148b: Rubber stopper

150: rubber cap 160: coupling member

161: cylinder 163: protrusion

165: coupling groove 170: oscillator

180: magnet 190: swing support member

191: block 193: groove

195: departure prevention unit 196: closing piece

198: protrusion 199: notch

200: case 210a: oxygen suction port

300: packing BA, BB: adsorption bed

SA, SB: Solenoid Valve CVA, CBB: Check Valve

IF: Suction Filter

The present invention relates to a oscillating piston type nitrogen vacuum pump having a high degree of vacuum and a vacuum swing adsorption (VSA) type oxygen generator for exhausting oxygen and nitrogen with a low degree of diaphragm type oxygen vacuum pump that vibrates and pumps by magnetic force. will be.

Conventionally, as a vacuum swing adsorption type oxygen generator, what is disclosed in the publication of Utility Model Registration No. 325459 previously filed and pre-registered by the present applicant is proposed. This oxygen generator is driven by a single motor of a swing piston type (or swing diaphragm) oxygen vacuum pump and a swing piston type (swing diaphragm) nitrogen vacuum pump which suck and exhaust oxygen and nitrogen in the adsorption bed.

By the way, the swinging piston type vacuum pump has a high degree of vacuum, and the noise from the vacuum pumps on both sides is reinforced to generate a large noise. To suppress this, a separate silencer is required.

In addition, in order to obtain oxygen stably, a pump with low vacuum degree and a pump with high vacuum degree are adopted for oxygen. To this end, the eccentric distance between the piston rod of the nitrogen vacuum pump and the rotary shaft of the motor is longer than the eccentric distance between the piston rod of the oxygen vacuum pump and the rotary shaft of the motor.

Due to the difference in the eccentric distance, the balance between the two pumps is not balanced, the vibration is severe, and despite the installation of the silencer, the noise is very loud and troubles that shorten the life of the pump.

The present invention has been made to solve the above-mentioned problems, and an object thereof is to provide a vacuum swing adsorption type oxygen generator that can stably generate oxygen while reducing noise.

Vacuum swing adsorption oxygen generator of the present invention for achieving the above object is a first adsorption bed filled with an adsorbent for adsorbing nitrogen in the air supplied from the air inlet side, nitrogen in the air introduced from the air inlet side An oxygen vacuum pump having a second adsorption bed filled with an adsorbent adsorbing the oxygen adsorbent, an oxygen suction port and an oxygen discharge port connected to a first oxygen discharge side of the first adsorption bed and a second oxygen discharge side of the second adsorption bed; And a first solenoid valve installed between the air inlet side and the first air supply side of the first suction bed, and a second solenoid valve installed between the first solenoid valve and the second air supply side of the second suction bed. And a nitrogen vacuum pump having a nitrogen suction port and a nitrogen discharge port connected to the first solenoid valve and the second solenoid valve.

The nitrogen vacuum pump is a swinging piston vacuum pump, and the oxygen vacuum pump is constituted by a diaphragm vacuum pump that vibrates and pumps by magnetic force.

This configuration can stably generate oxygen while reducing noise.

In the above-described configuration, the diaphragm-type oxygen vacuum pump is an electromagnet receiving an AC power source; A valve body composed of a valve seat having an oxygen intake port, the oxygen discharge port, an intake valve and an exhaust valve; Rubber caps; A coupling member for coupling the rubber cap to the valve seat; A vibrator for compressing and expanding the rubber cap; A magnet attached to one end of the vibrator opposite to the electromagnet; A pivot support member that pivotally supports the other end of the vibrator to the valve body; The oxygen suction port is installed, the oxygen discharge port is made of a case surrounding the configuration while the exposure port is exposed, the coupling member is formed in the circumferential direction of the cylinder and the outer peripheral surface of the cylinder formed on the valve seat If the protrusion is formed in the inner circumferential surface of the rubber cap and the coupling groove is coupled to the protrusion, it can be improved in the durability of the rubber cap by having room for movement in the portion that is not coupled with the protrusion when pumping.

At this time, when the coupling groove is formed along the circumferential direction of the inner circumferential surface of the rubber cap, the coupling of the rubber cap is very convenient to improve the assembly workability.

On the other hand, the pivot support member is a block installed in the valve body; A groove formed in the block and having the other end of the vibrator disposed therein and having an opening formed in the vibration direction of the vibrator; When configured as a departure prevention unit for preventing the other end of the vibrator is separated toward the opening, it is possible to prevent the breakage of the block due to the vibration of the vibrator.

At this time, the separation prevention portion closing the closing piece; It is preferably implemented by a fixing part for fixing the closing piece to the block.

The fixing part may be implemented by a female screw part formed in one side block of the groove, a fastening hole installed in the closing piece, and a screw fastening to the female screw part through the fastening hole.

When the protrusion is formed on the other side block of the groove, and the notch is formed on the closing piece corresponding to the protrusion, it is possible to prevent the closing piece from being lost when screwing.

On the other hand, the case is composed of an upper case and a lower case, further comprising a seal for sealing the upper case and the lower case, the packing is installed in the groove formed in the upper case and the lower case and the oxygen discharge A first packing formed with a drawing hole through which a port is drawn out, a second packing formed with a drawing hole through which a cable connected to the electromagnet is drawn out, and installed in a groove formed at an upper edge of the lower case; Consisting of a third packing,

When the first packing and the second packing, the second packing and the third packing, or the first packing and the second packing and the third packing are integrally formed, the sealing and assembly workability of the case are improved. Let's do it.

On the other hand, when the vibrator is made of a stainless steel material, it is light and prevents rust and the strength can be large to prevent deformation due to vibration.

Hereinafter, a preferred embodiment of the present invention will be described with reference to the accompanying drawings, the oscillating piston-type nitrogen vacuum pump 30 driven by a motor with reference to the above-mentioned publication and detailed description thereof will be omitted.

1 is a perspective view showing the appearance of a vacuum swing adsorption type oxygen generator according to a preferred embodiment of the present invention, Figure 2 is a block diagram of FIG. As shown in FIG. 2, the vacuum swing adsorption type oxygen generator 1 according to the present embodiment includes a first adsorption bed BA, a second adsorption bed BB, a first adsorption bed BA, and a second adsorption bed. Oscillating piston type nitrogen vacuum pump 30 connected to one end of BB, vibration diaphragm type oxygen vacuum pump 10 connected to the other end of first adsorption bed BA and second adsorption bed BB, and nitrogen vacuum The first solenoid valve SA installed between the pump 30 and the first suction bed BA, and the second solenoid valve SB installed between the nitrogen vacuum pump 30 and the second suction bed BB. Consists of.

In the above configurations, the diaphragm type oxygen vacuum pump 10 is mounted to the outside of the housing 3, as shown in FIG. 1, and the remaining components are mounted to the housing 3.

The first adsorption bed BA and the second adsorption bed BB are each filled with an adsorbent for adsorbing nitrogen in the air, and zeolite is preferable as the adsorbent.

At one end of the first adsorption bed BA and the second adsorption bed BB, air passing through the suction filter IF is introduced, and after oxygen is concentrated, it functions as a nitrogen outlet, whereas the first adsorption bed ( The other end of BA) and the second adsorption bed BB function as an oxygen outlet. For example, when oxygen is discharged from the other end of the first adsorption bed BA, nitrogen is discharged from one end of the second adsorption bed BB. On the contrary, when oxygen is discharged from the other end of the second adsorption bed BB, one end of the first adsorption bed BA is discharged with nitrogen. Such discharge of oxygen and nitrogen is alternately performed. Here, a check valve CV (CVB) is provided at the other end of the first adsorption bed BA and the second adsorption bed BB, respectively, to prevent backflow of oxygen.

In addition, it is preferable that the orifice OF communicating with each other is installed in the first adsorption bed BA and the second adsorption bed BB. For example, the orifice OF functions to supply oxygen to the adsorption bed BA where nitrogen is discharged when oxygen is discharged from the other end of the adsorption bed BB. This feature can increase the lifetime of the zeolite adsorbent. Although the position and diameter of this orifice OF vary with the length of the adsorption bed, it is preferable that the orifice OF be disposed close to the other end of the adsorption bed with a diameter of 0.3 mm or 0.4 mm.

The first solenoid valve SA is provided between the air supply side (or nitrogen discharge side) of the first suction bed BA and the nitrogen suction port of the nitrogen vacuum pump 30. The first solenoid valve SA is a switching valve for supplying air to the first adsorption bed BA or discharging nitrogen adsorbed to the first adsorption bed BA to the nitrogen suction port.

Similar to the first solenoid valve SA, the second solenoid valve SB is installed between the air supply side (or the nitrogen discharge side) and the nitrogen suction port of the second suction bed BB to the first suction bed BA. A switching valve for supplying air or discharging nitrogen adsorbed on the second adsorption bed BB to a nitrogen suction port. In this case, the second solenoid valve BB is controlled by a controller (not shown) while being disposed in communication with the first solenoid valve BA.

The other ends of the first suction bed BA and the second suction bed BB are connected to the oxygen suction port 210a of the oxygen vacuum pump 10.

As shown in FIG. 3, the diaphragm type oxygen vacuum pump 10 includes an oxygen vacuum pumping unit 100 and a case 200.

The oxygen vacuum pumping unit 100 includes an electromagnet 110 that receives AC power and an oxygen pump 130 that pumps oxygen using an electromagnetic force generated by the electromagnet 110.

The electromagnet 110 is composed of an iron core assembly 111 having an "E" shape and a coil 113 wound around the center of the core assembly 111. The iron core coupling member 111 has a bolt fastening hole 117 to which the fixing bolt 115 is fastened. In addition, the coil 113 is electrically connected to an external power supply device (not shown) through the cable 119.

As shown in FIGS. 4 and 6, the oxygen pumping unit 130 includes a coupling member 160 for coupling the valve body 140, the rubber cap 150, and the rubber cap 150 to the valve body 140. Swing support member for supporting the valve body 140 to pivotally support the vibrator 170 for compressing and expanding the rubber cap 150, the magnet 180 installed at one end of the vibrator 170, and the other end of the vibrator 170. It consists of 190.

As shown in FIG. 6, the valve body 140 includes oxygen suction ports 141a and 141b, an oxygen discharge port 143, and a valve seat 145. The valve seat 145 on the left side is composed of an intake valve 145a in communication with the oxygen inlet 141a and an exhaust valve 146a in communication with the oxygen discharge port 143. The valve seat 145 on the right side is composed of an intake valve 145b in communication with the oxygen inlet 141b and an exhaust valve 146b in communication with the oxygen discharge port 143. Rubber caps 150 are coupled to the left and right valve seats 145, respectively.

The rubber cap 150 functions to operate the intake valves 145a and 145b and the exhaust valves 146a and 146b as they are compressed and expanded. That is, as shown in Figure 6, the oxygen inlet through the oxygen inlet (141a; 14b) when inflating the rubber cap 150, the intake valve (145a; 145b) is opened and the exhaust valve (146a; 146b) is closed do.

On the contrary, when the rubber cap 150 is compressed, the intake valves 145a and 145b are closed and the exhaust valves 146a and 146b are opened, and oxygen is discharged to the oxygen discharge port 143 through the exhaust holes 147a and 147b. Will be.

In addition, behind the exhaust valves 146a and 146b, a rubber stopper (not shown) 148b for guiding oxygen to the oxygen discharge port 143 without the flow of oxygen to the opposite cylinder 161 when the exhaust valves 135a and 135b are opened. It is provided.

Coupling member 160 is a cylinder 161 is installed around the valve seat 145, a protrusion 163 formed along the circumferential direction of the cylinder 161, and a coupling groove formed on the inner peripheral surface of the rubber cap 150 ( 165).

In particular, as shown in FIG. 4, the protrusion 163 is preferably formed only in a portion along the circumferential direction (about 180 ° in the present embodiment). Due to this configuration, when the rubber cap 150 is inflated and compressed, the rubber cap 150 of the portion that is not coupled with the protrusion 163 has room for movement, and the rubber cap 150 may be repeatedly operated or excessively expanded. ) Tearing can be prevented.

In addition, the protrusion 163 is preferably formed on the air inlet 141 side. This is because a mold design capable of easily separating the valve body 140 from a mold can be performed, thereby reducing the number of steps. If the protruding portion is provided on the opposite side, the valve body 140 of the air discharge port 143 is formed to be considerably thicker than the thickness of the valve seat 145, so that at least two steps are required to separate the valve body from the mold. Done.

Coupling groove 165 is preferably formed as a whole 360 °, as shown in FIG. If the coupling groove 165 is formed as long as the arc length corresponding to the protrusion 163, it takes a long time to combine, which may degrade assembly workability.

A magnet 180 facing the electromagnet 100 is attached to one end of the vibrator 170, and the other end is provided to the valve body 140 by the pivot support member 190. The center of the vibrator 170 is fastened to the center of the rubber cap 150. Therefore, when a magnetic force is generated in the electromagnet 100, the magnet 180 vibrates from side to side, and the vibration causes the vibrator 170 to vibrate to compress and expand the rubber cap 150. At this time, the other end of the vibrator 170 is preferably provided with a dust-proof rubber 175 that can absorb the shock during the vibration.

In particular, the vibrator 170 is preferably made of a stainless material. That is, stainless steel prevents rust and is light. In addition, a magnet having a strong magnetic force (for example, neodymium magnet, etc.) is used to increase the vibration speed, and has a strength to withstand the strong magnet, thereby preventing the shape of the vibrator 170 from being deformed.

Swivel support member 190 is a block 191 installed in the valve body 140, the groove 193 formed in the block 191, the separation prevention portion 195 to prevent the other end of the vibrator 170 is separated It consists of.

The recess 193 divides the block 191 into a block 191a and a block 191b, and the other end of the vibrator 170 may be inserted into and disposed in a direction perpendicular to the vibration direction or the vibration direction. Therefore, the resistance received by the blocks 191a and 191b by the other end of the vibrator 170 is very weak, and the blocks 191a and 191b itself can be manufactured in a shape having a large cross-sectional coefficient, thereby stably vibrating the vibrator ( 170).

The departure prevention part 195 is comprised from the closing piece 196 which closes the opening (vibration direction side) of the recess 193, and the fixing part which fixes this closing piece 196 to the block 191. As shown in FIG. The closure piece 196 is preferably implemented with a material of high strength.

The fixing part 197c which is fastened to the female screw part 197a through the female screw part 197a formed in the block 191a, the fastening hole 197b installed in the closing piece 196, and the fastening hole 197b. It can be implemented as. At this time, if the protrusion 198 is formed in the block 191b, and the notch 199 is formed in the closing piece 196 corresponding to the protrusion 198, the closing piece 196 is loose when the screw 197c is fastened. It can prevent turning.

The diaphragm type oxygen vacuum pump 100 is mounted in the case 200. The case 200 is composed of an upper case 200a and a lower case 200b in which an oxygen suction port 210a is installed at a side surface thereof. The upper case 200a and the lower case 200b are provided with a packing 300 for sealing the inside, thereby suppressing the extraction of oxygen from being mixed with the outside air.

The lower surface of the upper case 200a and the upper surface of the lower case 200b are formed in the extraction grooves 220a and 220b through which the oxygen discharge port 143 is drawn out, and the cable 119 is formed on the upper surface of the lower case 200b. The withdrawal groove 230b and the edge groove 250b are formed to be drawn out.

The packing 300 includes a first packing 310, a second packing 330, and a third packing 350 for sealing the withdrawal grooves 220a and 220b, the withdrawal groove 230b and the edge groove 250b, respectively. It consists of. The first packing 310 has a drawing hole 310a through which the oxygen discharge port 143 is drawn out, and a drawing hole 330a through which the cable 119 is drawn out is formed in the second packing 330.

In the present exemplary embodiment, the first packing 310 and the third packing 350 are integrally formed, or the second packing 330 and the third packing 350 are integrally formed, or the first packing 310 and the first packing 310 are formed integrally. The second packing 330 and the third packing 350 are integrally formed.

As such, since the packing is integrally formed, assembly workability and sealing efficiency according to the modularization of the packing can be improved.

Vacuum swing adsorption oxygen generator according to the present invention is not limited to the above embodiment can be carried out in a variety of modifications within the range allowed by the technical idea of the present invention.

As apparent from the above description, the vacuum swing adsorption type oxygen generator according to the embodiment of the present invention has the following effects.

First, by adopting the configuration of oscillating piston type nitrogen vacuum pump with high degree of vacuum and oscillation diaphragm type oxygen vacuum pump with low degree of vacuum, it is possible to stably extract oxygen and nitrogen as well as to inhale / exhaust oxygen by vibrating diaphragm type. Noise can be significantly reduced.

Second, the protrusion is partially formed along the circumferential direction of the outer circumferential surface of the cylinder formed in the valve seat, so that there is room for movement in the portion that is not coupled with the protrusion during pumping, and a balance is formed in the expansion of the rubber cap, thereby improving durability of the rubber cap. Can be improved.

Third, as the coupling groove of the rubber cap is formed along the circumferential direction as a whole, the coupling of the rubber cap to the protrusion is very convenient, thereby improving the assembly workability.

Fourth, by forming the groove between the block and the block on which the swing support member is installed in the valve body, a layout for increasing the cross-sectional coefficient of the block is formed, and it is possible to reliably prevent damage to the block due to vibration of the vibrator. In addition, even when an abnormality occurs in the closing piece, replacing only the closing piece does not interfere with turning the vibrator, thereby reducing the cost of replacing the entire valve element.

Fifth, a protrusion is formed in the other side block of the groove, and a notch is formed in the closing piece corresponding to the protrusion, so that the screwing of the closing piece can be prevented.

Sixth, the first packing and the third packing sealing the upper case and the lower case on which the oxygen vacuum pump is mounted, the second packing and the third packing integrally, or the first packing, the second packing and the third packing By integrally molding, the sealability and assembly workability of the case are improved.

Seventh, since the vibrator is made of stainless steel, it is possible to prevent deformation, which is not only light and prevents rust, but also bends against vibration of a magnet whose magnetic strength is large.

Claims (11)

A first adsorption bed filled with an adsorbent for adsorbing nitrogen in the air supplied from the air inlet side, A second adsorption bed filled with an adsorbent for adsorbing nitrogen in the air introduced from the air inlet side; An oxygen vacuum pump having an oxygen suction port and an oxygen discharge port connected to the first oxygen discharge side of the first suction bed and the second oxygen discharge side of the second suction bed; A first solenoid valve installed between the air inlet side and the first air supply side of the first adsorptive bed; A second solenoid valve installed between the first solenoid valve and the second air supply side of the second suction bed; A nitrogen vacuum pump having a nitrogen suction port and a nitrogen discharge port connected to the first solenoid valve and the second solenoid valve, The nitrogen vacuum pump is a swinging piston vacuum pump, The oxygen vacuum pump is a vibration diaphragm type vacuum pump, The vibration diaphragm type vacuum pump is an electromagnet receiving an AC power; A valve body composed of a valve seat having an oxygen intake port, the oxygen discharge port, an intake valve and an exhaust valve; Rubber caps; A coupling member for coupling the rubber cap to the valve seat; A vibrator for compressing and expanding the rubber cap; A magnet attached to one end of the vibrator opposite to the electromagnet; A pivot support member that pivotally supports the other end of the vibrator to the valve body; The oxygen suction port is installed, vacuum swing adsorption type oxygen generator, characterized in that made of a case surrounding the components while the oxygen discharge port is exposed. The method of claim 1, The coupling member includes a cylinder formed in the valve seat, a protrusion partially formed along the circumferential direction of the outer circumferential surface of the cylinder, and a coupling groove formed on the inner circumferential surface of the rubber cap and coupled to the protrusion. Vacuum swing adsorption type oxygen generator. The vacuum swing adsorption type oxygen generator according to claim 2, wherein the coupling groove is formed along the circumferential direction of the inner circumferential surface of the rubber cap. The method of claim 1, The pivot support member is a block installed in the valve body; A groove formed in the block and having the other end of the vibrator disposed therein and having an opening formed in the vibration direction of the vibrator; A vacuum swing adsorption type oxygen generator, characterized in that composed of a departure prevention portion for preventing the other end of the vibrator is separated toward the opening. The apparatus of claim 4, wherein the release preventing part comprises: a closing piece closing the opening; Vacuum swing adsorption type oxygen generator, characterized in that consisting of a fixing portion for fixing the closing piece to the block. The vacuum according to claim 5, wherein the fixing part comprises a female screw part formed in one side block of the groove, a fastening hole installed in the closing piece, and a screw fastening to the female screw part through the fastening hole. Swing adsorption oxygen generator. The method of claim 6, wherein the other block of the groove is formed with a projection, The vacuum swing adsorption type oxygen generator, characterized in that the notch is formed in the closing piece corresponding to the projection. According to claim 1, wherein the case is composed of an upper case and a lower case, further comprising a packing for sealing the upper case and the lower case, The packing is installed in the grooves formed in the upper case and the lower case, the first packing is formed with a draw hole for the oxygen discharge port is drawn out, the drawer is installed in the groove formed in the lower case and the cable connected to the electromagnet is drawn out A second packing formed with a ball, and a third packing installed in a groove formed at an upper edge of the lower case, The first packing and the second packing is a vacuum swing adsorption oxygen generator, characterized in that formed integrally. According to claim 1, wherein the case is composed of an upper case and a lower case, further comprising a packing for sealing the upper case and the lower case, The packing is installed in the grooves formed in the upper case and the lower case, the first packing is formed with a draw hole for the oxygen discharge port is drawn out, the drawer is installed in the groove formed in the lower case and the cable connected to the electromagnet is drawn out A second packing formed with a ball, and a third packing installed in a groove formed at an upper edge of the lower case, The second packing and the third packing is a vacuum swing adsorption type oxygen generator, characterized in that formed integrally. According to claim 1, wherein the case is composed of an upper case and a lower case, further comprising a packing for sealing the upper case and the lower case, The packing is installed in the grooves formed in the upper case and the lower case, the first packing is formed with a draw hole for the oxygen discharge port is drawn out, the drawer is installed in the groove formed in the lower case and the cable connected to the electromagnet is drawn out A second packing formed with a ball, and a third packing installed in a groove formed at an upper edge of the lower case, The first packing, the second packing and the third packing is a vacuum swing adsorption type oxygen generator, characterized in that formed integrally. The vacuum swing adsorption oxygen generator according to any one of claims 1 to 10, wherein the vibrator is made of stainless steel.

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