KR200325459Y1 - Vacuum swing absorption type oxygen generation apparatus for car - Google Patents

Abstract

The present invention relates to a vacuum swing adsorption type oxygen generator for a vehicle for exhausting oxygen and nitrogen by vacuum swing adsorption by driving an oxygen exhaust vacuum pumping unit and a nitrogen exhaust vacuum pumping unit with a single motor.

Description

Vacuum swing adsorption type oxygen generator for vehicle {VACUUM SWING ABSORPTION TYPE OXYGEN GENERATION APPARATUS FOR CAR}

The present invention relates to a vacuum swing adsorption type oxygen generator for a vehicle for exhausting oxygen and nitrogen by vacuum swing adsorption by driving an oxygen exhaust vacuum pumping unit and a nitrogen exhaust vacuum pumping unit with a single motor.

The method of generating and supplying oxygen includes a pressure swing adsorption (PSA) method using an adsorbent such as zeolite, a method of separating oxygen using a gas separation membrane and a vacuum pump to create a pressure difference and There is a vacuum swing adsorption (VSA) method for making oxygen-enriched air. Here, in the PSA method using the compression swing adsorption and the method using the gas separation membrane, air must be compressed to a pressure of about 2 to 4 atm using a separate air compressor. Therefore, in order to be applied to a vehicle, the noise to be transmitted to the inside of the vehicle must be minimized, and the durability to withstand the shock transmitted from the vehicle body must be combined, and the power consumption of the vehicle used as a power source must be minimized. There has been a problem to solve such problems as miniaturization.

The present invention has been made in order to solve the above problems, and an object thereof is to provide a vacuum swing adsorption type oxygen generator for a vehicle that can be easily applied to the vehicle through an optimized configuration.

1 is a block diagram showing a vacuum swing adsorption type oxygen generator for a vehicle according to a preferred embodiment of the present invention.

Figure 2 is a perspective view showing a vacuum pump for an oxygen generating device according to an embodiment of the present invention.

3 is an exploded perspective view illustrating an oxygen exhaust vacuum pumping unit or a nitrogen exhaust vacuum pumping unit of FIG. 2;

Figure 4 is an enlarged perspective view showing a separation structure of the pressure chamber and the cylinder shown in FIG.

5 is a cross-sectional view illustrating a cross-sectional structure of the oxygen exhaust vacuum pumping unit and the nitrogen exhaust vacuum pumping unit of FIG. 2.

Figure 6 is a cross-sectional view comparing the cross-sectional structure of the oxygen exhaust vacuum pumping unit and the nitrogen exhaust vacuum pumping unit according to another embodiment of the present invention.

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

BA, BB: Suction bed SA, SB: Solenoid valve

CVA, CVB: Check valve IF: Suction filter

FRV: Flow control valve SL: Silencer

100: motor 200a: oxygen exhaust vacuum pumping section

200b: nitrogen exhaust vacuum pumping section 210a, 210b: first and second pressure chamber

211a: oxygen suction port 211b: nitrogen suction port

212a: oxygen exhaust port 212b: nitrogen exhaust port

213: bulkhead 220: filter

230: cover 250a, 250b: first, second cylinder

251: (cylinder) body 252: valve receiving groove

253a, 254a: first intake / exhaust hole 253b, 254b: second intake / exhaust hole

255: flange portion 260: support

270a, 270b: first and second pressure generating means 271: piston rod

272: ring 273: cap

274a, 274b: first and second diaphragms 275a, 275b: diaphragm rod

280a, 280b: 1st, 2nd rotation piece 292a, 294a: 1st intake / exhaust valve

292b, 294b: second intake / exhaust valve 300: vacuum pump

A vacuum swing adsorption type oxygen generator for a vehicle of the present invention for achieving the above object includes a first adsorption bed filled with an adsorbent for adsorbing nitrogen in air; A second adsorption bed filled with an adsorbent for adsorbing nitrogen in the air; A nitrogen exhaust vacuum pump having a nitrogen suction port; An oxygen exhaust vacuum pump having an oxygen suction port connected to the first oxygen discharge side of the first adsorption bed and the second oxygen discharge side of the second adsorption bed; A first solenoid valve disposed between the air inlet side, the first air supply side of the first suction bed, and the nitrogen suction port; A second solenoid valve communicating with the first solenoid valve and installed between the second air supply side of the second suction bed and the nitrogen suction port; It comprises a motor for driving the nitrogen exhaust vacuum pumping unit and the oxygen exhaust vacuum pumping unit.

Through this configuration, oxygen and nitrogen can be exhausted with a single motor, so that the motor can be easily applied through an optimized configuration.

In the above-described configuration, the eccentric distance between the piston rod of the nitrogen exhaust vacuum pumping unit and the rotational axis of the motor is longer than the eccentric distance between the piston rod of the oxygen exhaust vacuum pumping unit and the other rotational axis of the motor, whereby Nitrogen can be evacuated smoothly.

On the other hand, the eccentric distance between the diaphragm rod of the nitrogen exhaust vacuum pumping unit and the rotation axis of the motor may be longer than the eccentric distance between the diaphragm rod of the oxygen exhaust vacuum pumping unit and the other rotation axis of the motor.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

1 is a block diagram showing a vacuum swing adsorption oxygen generator for a vehicle according to a preferred embodiment of the present invention, Figure 2 is a perspective view showing a vacuum pump for an oxygen generating device according to an embodiment of the present invention, 3 is an exploded perspective view illustrating an oxygen exhaust vacuum pump or a nitrogen exhaust vacuum pump of FIG. 2, FIG. 4 is an enlarged perspective view illustrating a separation structure of the pressure chamber and the cylinder shown in FIG. 2, and FIG. A cross-sectional view showing a cross-sectional structure of an oxygen exhaust vacuum pumping unit and a nitrogen exhaust vacuum pumping unit.

As shown in FIG. 1, the vehicle vacuum swing adsorption oxygen generator of the present embodiment includes a first adsorption bed BA and a second adsorption bed BB filled with a zeolite adsorbent that adsorbs nitrogen in air, and an oxygen exhaust vacuum. Pumping unit 200a, nitrogen exhaust vacuum pumping unit 200b, nitrogen exhaust vacuum pumping unit 200b and the first solenoid valve (SA) installed between the first adsorption bed (BA), nitrogen exhaust vacuum pumping unit (200b) ) And a second solenoid valve SB installed between the second adsorption bed BB, and one motor 100 for driving the nitrogen exhaust vacuum pump 200b and the oxygen exhaust vacuum pump 200a. It is.

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 preferred 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 flows in, and after oxygen is concentrated, it functions as a nitrogen discharge side. The other end of BA) and the second adsorption bed BB function as an oxygen discharge side. 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, an orifice OF communicating with each other is provided in the first adsorption bed BA and the second adsorption bed BB. The orifice OF serves to, for example, inject oxygen into the adsorption bed BA of the counterpart 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 inlet side or the nitrogen discharge side of the first suction bed BA and the nitrogen suction port 211b of the nitrogen exhaust vacuum pump 200b. 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.

Similar to the first solenoid valve SA, the second solenoid valve SB is also disposed between the air inlet side or the nitrogen discharge side of the second suction bed BB and the nitrogen suction port 211b of the nitrogen exhaust vacuum pumping part 200b. The switching valve is installed to supply air to the second adsorption bed BA or to discharge nitrogen adsorbed to the second adsorption bed BB. 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.

As shown in FIG. 2, the vacuum pump 300 includes a motor 100, an oxygen exhaust vacuum pump 200a and a nitrogen exhaust vacuum pump 200b disposed at both ends of the motor 100.

The oxygen exhaust vacuum pumping unit 200a and the nitrogen exhaust vacuum pumping unit 200b simultaneously perform a gas (oxygen / nitrogen) pumping action by the rotational power of both rotating shafts (not shown) of the motor 100.

The oxygen exhaust vacuum pumping unit 200a / nitrogen exhaust vacuum pumping unit 200b includes an oxygen intake port 211a / nitrogen intake port 211b through which oxygen or nitrogen is sucked, and an oxygen intake port 211a / nitrogen intake port ( The gas introduced through 211b is pumped to exhaust oxygen / nitrogen through the oxygen exhaust port 212a / nitrogen exhaust port 212b.

The oxygen suction port 211a is connected to the other end of the first suction bed BA and the second suction bed BB, and the nitrogen suction port 211b is connected to the first solenoid valve SA and the second solenoid valve SB. (See FIG. 1).

3 is an exploded perspective view showing in detail the structure of the pumping unit shown in FIG. 2, and FIG. 4 is an enlarged perspective view showing a coupling structure of the pressure chamber and the cylinder shown in FIG.

For reference, the above-described oxygen exhaust vacuum pumping unit 200a and nitrogen exhaust vacuum pumping unit 200b have corresponding configurations, and thus, only the structure of the oxygen exhaust vacuum pumping unit 200a will be described in FIGS. 3 and 4. Shall be.

As shown in FIGS. 3 and 4, the oxygen exhaust vacuum pumping unit 200a includes a first pressure chamber 210a in which an oxygen suction port 211a and an oxygen exhaust port 212a are formed to suck and exhaust gas. And a first piston 250a coupled to a lower portion of the first pressure chamber 210a and a first piston for reciprocating the inside of the first cylinder 250a to pressurize or depressurize the inside of the first pressure chamber 210a. 270a and a first rotating piece 280a rotating by the motor 100 and linearly moving the first piston 270a.

Specifically, the first pressure chamber (210a) is formed with a partition wall 213 for dividing the internal space so that the oxygen suction port (211a) and the oxygen exhaust port (212a) is symmetrical, the first intake valve to be described later A second intake hole 253b and a second exhaust hole 254b which are opened and closed by the 292a and the second exhaust valve 294a are formed.

In addition, a filter 220 is provided inside the first pressure chamber 210a to filter gas entering and exiting through the oxygen suction port 211a and the oxygen exhaust port 212a, and the filter 220 is accommodated therein. In the state, the upper portion of the first pressure chamber 210a is closed through the cover 230.

In addition, a rubber ring 240 is interposed between the first pressure chamber 210a and the cover 230 to seal a gap to prevent external leakage of gas.

On the other hand, the first cylinder (250a) is composed of a cylindrical body 251 having a space portion therein and a flange portion 255 for closing the upper portion of the body 251, the flange portion 255 has a first suction A valve receiving groove 252 is formed in which the exhaust valves 292a and 294a are accommodated.

In addition, a first intake hole 253a and a first exhaust hole 254a which are opened and closed by the first intake valve 292a and the first exhaust valve 294a are formed inside the valve receiving groove 252. .

The first cylinder 250a is coupled to the support 260 and is fixedly supported at one end of the motor 100.

The first intake valve 292a and the first exhaust valve 294a are selectively opened and closed according to the reciprocating movement of the first pressure generating means 270a.

At this time, the piston structure is employed as the first pressure generating means (270a) according to an embodiment of the present invention.

The first pressure generating means (270a) is composed of a combination of the piston rod 271, the ring 272 and the cap (273) and is accommodated in the body 251 of the first cylinder (250a) to reciprocate in the vertical direction Will perform the move.

In addition, a central portion of the first rotating piece 280a is coupled to the rotating shaft of the motor 100, and the piston rod 271 of the first pressure generating means 270a is located at a position eccentric with the rotating shaft coupling portion. The bearing is rotatably coupled.

On the other hand, Figure 5 is a cross-sectional view showing a cross-sectional structure of the oxygen exhaust vacuum pumping unit 200a and the nitrogen exhaust vacuum pumping unit 200b. As shown in FIG. 5, the eccentric distance L1 of the first pressure generating means 270a according to the present embodiment is formed to be smaller than the eccentric distance L2 of the second pressure generating means 270b.

For reference, the eccentric distances L1 and L2 of the first and second pressure generating means 270a and 270b mentioned above are rotated by the first and second rotary pieces 280a and 280b respectively coupled with the rotation shafts of the motor 100. The distance from the center portion to the portion where the first and second pressure generating means 270a and 270b are coupled.

When the eccentric distances L1 and L2 of the first and second pressure generating means 270a and 270b are different from each other in the above structure, the first and second pistons according to the rotation of the first and second rotating pieces 280a and 280b are provided. The stroke distances of the 270a and 270b are different from each other so that the vacuum pressure by the nitrogen exhaust vacuum pump 200b becomes higher than the vacuum pressure of the oxygen exhaust vacuum pump 200a.

Due to this difference in vacuum pressure, not only the nitrogen exhaust in the adsorption bed is easy, but also the oxygen in and out of the orifice can be made smoothly.

Looking at the operation of the first embodiment having such a configuration as follows.

When the motor 100 is driven, when the first pressure generating means 270a of the oxygen exhaust vacuum pumping unit 200a and the second pressure generating means 270b of the nitrogen exhaust vacuum pumping unit 200b operate, air is sucked in. It is introduced through the filter IF.

The introduced air is supplied to the first adsorption bed BA and the second adsorption bed BB through the first solenoid valve SA and the second solenoid valve SB. The supplied air is adsorbed with nitrogen and concentrated with oxygen in each bed. When the concentration is about 50% or more, the first solenoid valve SA is closed and the second solenoid valve SB is connected to the nitrogen exhaust vacuum pump 200b. Therefore, the first adsorption bed BA is discharged through the first check valve CVA by the vacuum pressure of the oxygen exhaust vacuum pumping part 200a, and the nitrogen is discharged from the second adsorption bed BB to form the second solenoid. It is sucked into the nitrogen suction port 211B through the valve (SB). These cycles are performed alternately with each other so that oxygen and nitrogen can be exhausted simultaneously.

Thus, since the oxygen exhaust vacuum pump 200a and the nitrogen exhaust vacuum pump 200b connected to the adsorption bed BA (BB) can be driven using one motor 100, the oxygen generator It can be manufactured compactly, which makes it very easy to apply to a narrow vehicle.

On the other hand, Figure 6 is a cross-sectional view showing an oxygen exhaust vacuum pumping unit and a nitrogen exhaust vacuum pumping unit according to a second embodiment of the present invention. As shown in FIG. 6, the pumping part structure according to the second embodiment employs a gas pumping method using a diaphragm.

For reference, since the mechanism of the oxygen exhaust vacuum pumping unit 200a and the nitrogen exhaust vacuum pumping unit 200b according to the second embodiment of the present invention are the same, only the structure of the oxygen exhaust vacuum pumping unit 200a will be described. The same reference numerals will be given to parts performing the same functions as those of the pumping units in the first embodiment, and detailed description thereof will be omitted.

In detail, a first diaphragm 274a for pumping gas is installed between the first pressure chamber 210a and the support 260.

The first diaphragm 274a is made of a rubber material that is elastically deformable, and a first diaphragm rod 275a connected to the first rotating piece 280a is coupled to a lower end of the central portion.

In addition, the space between the first diaphragm 274a and the first pressure chamber 210a is maintained in a completely closed state.

A first intake hole 253a and a first exhaust hole 254a are formed in the bottom surface of the first pressure chamber 210a, and the first intake hole 253a and the first exhaust hole 254a are respectively formed. It is possible to open and close via the first intake valve 292a and the first exhaust valve 294a.

In addition, the first diaphragm rod 275a coupled to the first diaphragm 274a is eccentrically coupled so as to be rotatable on the first rotating piece 280a.

At this time, the eccentric distance (L1) of the first diaphragm rod (275a) is also formed smaller than the eccentric distance (L2) of the second diaphragm rod (275b), as in the above-described piston rod, to the nitrogen exhaust vacuum pumping part (200b) It is preferable to make the vacuum pressure higher than the vacuum pressure of the oxygen exhaust vacuum pumping part 200a.

Therefore, when the motor 100 is driven to rotate the first rotating piece 280a, the first diaphragm rod 275a eccentrically coupled with the first rotating piece 280a is reciprocated in the vertical direction, and thus the first diaphragm ( 274a) is repeatedly contracted and inflated.

In this process, when the first diaphragm 274a descends, the first intake valve 292a is opened, and the first exhaust valve 294a is closed to inhale the gas through the first intake hole 253a. At the time of rising, the first intake valve 292a is closed and at the same time the first exhaust valve 294a is opened to exhaust the gas through the first exhaust hole 254a, thereby performing the pumping operation of the gas.

On the other hand, the oxygen concentrated in the adsorption bed (BA) (BB) is a high concentration. In order to dilute this high concentration to a low concentration, as shown in FIG. 1, it is preferable that the air flow control valve FRV is provided between the air inflow side and the oxygen suction port 211a. Therefore, by diluting the high concentration of oxygen discharged from the adsorption bed to low concentration, it is possible to supply appropriate oxygen to the room.

On the other hand, it is preferable that the silencer SL is installed in the oxygen exhaust port 212a.

On the other hand, as a method of diluting a high concentration of oxygen to a low concentration, an orifice (called a secondary orifice) may be incorporated in an oxygen discharge line between the adsorption bed BA (BB) and the oxygen suction port 211a.

The vacuum swing adsorption type oxygen generator for a vehicle according to the present invention is not limited to the above-described embodiment and can be variously modified within the range allowed by the technical idea of the present invention.

As is apparent from the above description, according to the vacuum swing adsorption type oxygen generator for a vehicle according to the embodiment of the present invention, the following effects are obtained.

First, oxygen and nitrogen can be simultaneously exhausted by one motor, and thus, the device itself can be compactly designed without using a separate motor as in the related art, thereby improving the layout of the vehicle mounting.

Second, by increasing the eccentric distance between the piston rod of the nitrogen exhaust vacuum pump and the rotation axis of the motor longer than the eccentric distance between the piston rod of the oxygen exhaust vacuum pump and the other rotation axis of the motor, the vacuum pressure of the nitrogen exhaust vacuum pump can be increased. The discharge of oxygen and nitrogen can be facilitated.

Claims (3)

A first adsorption bed filled with an adsorbent for adsorbing nitrogen in the air; A second adsorption bed filled with an adsorbent for adsorbing nitrogen in the air; A nitrogen exhaust vacuum pump having a nitrogen suction port; An oxygen exhaust vacuum pump having an oxygen suction port connected to a first oxygen discharge side of the first adsorption bed and a second oxygen discharge side of the second adsorption bed; A first solenoid valve disposed between the air inlet side, the first air supply side of the first suction bed, and the nitrogen suction port; A second solenoid valve communicating with the first solenoid valve and installed between the second air supply side of the second suction bed and the nitrogen suction port; A vacuum swing adsorption type oxygen generator for a vehicle comprising a motor for driving the nitrogen exhaust vacuum pumping unit and the oxygen exhaust vacuum pumping unit. The vehicle vacuum swing adsorption according to claim 1, wherein an eccentric distance between the piston rod of the nitrogen exhaust vacuum pumping unit and the rotating shaft of the motor is longer than an eccentric distance between the piston rod of the oxygen exhaust vacuum pumping unit and the other rotating shaft of the motor. Type oxygen generator. The vehicle vacuum swing adsorption according to claim 1, wherein an eccentric distance between the diaphragm rod of the nitrogen exhaust vacuum pumping unit and the rotation axis of the motor is longer than an eccentric distance between the diaphragm rod of the oxygen exhaust vacuum pumping unit and the other rotation axis of the motor. Type oxygen generator.