Plate type pneumatic reversing valve of oxygen generator

Abstract

The utility model discloses a plate-type pneumatic reversing valve of an oxygen generator. The plate-type pneumatic reversing valve is mainly technically characterized in that electromagnetic valves are arranged on a valve body and correspond to a first vent hole and a second vent hole of the valve body in position; the pneumatic reversing valve has the advantages that on one hand, the electromagnetic valve is arranged on the valve body, so that the overall height of the pneumatic reversing valve is reduced, the size of the pneumatic reversing valve is reduced, and the pneumatic reversing valve is suitable for being used on an oxygen generator which is small in size and convenient to carry; and on the other hand, the two second vent holes are formed in the air inlet channel, and each second vent hole is independently controlled by the corresponding electromagnetic valve, so that the high-pressure air is in the air inlet channel, and the pressure stability and the flow constancy of the high-pressure air can be better ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of pneumatic reversing valves, in particular to a plate-type pneumatic reversing valve for an oxygen concentrator. Background Art

[0002] At present, in the field of oxygen concentrator technology, small size and easy to carry is the current technical development trend of oxygen concentrators. And for each component used in the oxygen concentrator, it is also necessary to make technological innovations accordingly. Among them, the same is true for pneumatic reversing valves.

[0003] In the prior art, for example, a Chinese utility model patent with a publication number of CN212804497U discloses a new type of pilot pneumatic reversing valve for a household oxygen concentrator, the technical feature of which is that the pilot plate and the base in the valve body assembly are an integrated structure, and the pilot plate is vertically arranged on the base. Such an arrangement structure increases the width and height of the pneumatic reversing valve, and cannot be used on a small and portable oxygen concentrator. Utility Model Content

[0004] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a plate-type pneumatic reversing valve for an oxygen concentrator.

[0005] In order to overcome the above technical problems, the technical solution adopted by the utility model is:

[0006] The invention comprises a valve core assembly, wherein the valve core assembly is respectively arranged in two inner cavities of a valve body, a spring arranged between an inner hole at one end of the valve core assembly and a small cavity opening of the inner cavity, an inner sealing end cover arranged at a large cavity opening of the inner cavity of the valve body, a pressure plate arranged at the other end of the valve core assembly, a diaphragm arranged between the bottom end and the base of the inner sealing end cover, a sealing member arranged between the inner sealing end cover and the inner cavity, and a joint body arranged at the molecular sieve interface of the valve body, characterized in that it also comprises a solenoid valve arranged on the valve body and corresponding to the positions of the first vent hole and the second vent hole of the valve body;

[0007] Furthermore, two molecular sieve interfaces, a first vent hole, and a second vent hole are provided on one side of the valve body;

[0008] Furthermore, a high-pressure air inlet interface and two exhaust interfaces are provided on one side of the valve body; the two exhaust interfaces are respectively provided above the high-pressure air inlet interface, each exhaust interface is respectively connected to the inner cavity of the valve body, and a crescent hole is formed at the intersection of the exhaust interface and the inner cavity.

[0009] Furthermore, each of the molecular sieve interfaces passes through an inner cavity of a valve body;

[0010] Furthermore, there are two first ventilation holes and two second ventilation holes respectively.

[0011] Furthermore, the first vent hole and the second vent hole are arranged in the middle of the two molecular sieve interfaces and close to the upper and lower ends of the valve body.

[0012] Furthermore, the first vent hole is connected to an air inlet passage arranged inside the valve body, and one end of the air inlet passage passes through a circular hole on the end surface of the valve body;

[0013] Furthermore, the second vent hole penetrates a high-pressure gas channel provided inside the valve body;

[0014] The high-pressure gas channel is arranged in the middle of the valve body, the high-pressure gas channel is connected with the high-pressure air inlet interface, and a crescent hole is formed at the high-pressure air inlet interface, and the crescent hole is respectively connected with the two inner cavities inside the valve body.

[0015] The gas channel and the inner cavity of the valve body are intersected to form a cross hole, and the cross hole is connected with the two inner cavities inside the valve body.

[0016] Furthermore, the large openings of the two inner cavities inside the valve body face the end surface of the valve body.

[0017] Furthermore, a longitudinal boss is provided on the surface of the valve body near the first vent hole, and a transverse boss is provided on the surface of the valve body near the second vent hole, and the solenoid valve is respectively fitted with the longitudinal boss and the transverse boss.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] 1. By setting the solenoid valve on the valve body, the overall height is reduced;

[0020] Second, the high-pressure gas channel is arranged in the middle of the valve body, and the high-pressure gas channel is connected with the high-pressure air inlet interface, that is to say, the two ends of the high-pressure gas channel are perpendicular to the molecular sieve interface, the high-pressure air inlet interface, and the exhaust interface, so that the overall length and width dimensions are compressed, thereby reducing the volume of the pneumatic reversing valve, which is used to adapt to the use of small and portable oxygen concentrators.

[0021] Third, since the two second vents are both arranged on the air inlet passage, and each second vent is independently controlled by its own solenoid valve, the pressure stability and flow constancy of the high-pressure gas in the air inlet passage can be better ensured.

[0022] Fourth, through the longitudinal boss provided on the surface of the valve body near the first vent hole, and the transverse boss provided on the surface of the valve body near the second vent hole, the solenoid valve is respectively fitted with the longitudinal boss and the transverse boss after installation. The longitudinal boss and the transverse boss are used for limiting the solenoid valve after installation to prevent the solenoid valve from being impacted when the air pressure in the valve body changes or the size of the airflow changes, so that the solenoid valve can work stably. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0024] Figure 1 It is the front view of the utility model.

[0025] Figure 2 yes Figure 1 Top view of the .

[0026] Figure 3 yes Figure 1 Left view of .

[0027] Figure 4 yes Figure 1 Shown is a cross-sectional view along line AA.

[0028] Figure 5 yes Figure 2 Shown is a cross-sectional view along line BB.

[0029] Figure 6 yes Figure 1 A three-dimensional diagram of the object is shown, and the internal structure is presented by using the cutaway method.

[0030] Figure 7 It is a front view of the valve body of the utility model.

[0031] Figure 8 yes Figure 7 Top view of the .

[0032] Fig. 9 yes Figure 7 Left view of .

[0033] Fig.10 yes Figure 7 Shown is a cross-sectional view along line CC.

[0034] Fig.11 yes Figure 7 Shown is a cross-sectional view along line DD.

[0035] Fig.12 yes Fig. 9 Shown is a cross-sectional view along line EE.

[0036] Fig.13 yes Figure 7Shown is a partial enlarged view of area F.

[0037] Fig.14 yes Figure 7 Stereoscopic diagram.

[0038] Description of reference numerals:

[0039] 1-valve body, 2-molecular sieve interface, 3-inner cavity, 301-large cavity opening, 302-small cavity opening, 4a-first vent, 4b-second vent, 5-inlet channel, 6, round hole, 7-high-pressure gas channel, 8-high-pressure inlet interface, 9-spherical plugging, 10-crescent hole, 11-intersecting hole, 12-exhaust interface, 13-valve core assembly, 14-spring, 15-inner sealing end cover, 16-pressure plate, 17-diaphragm, 18-base, 19-seal, 20-connector body, 21-solenoid valve, 22-longitudinal boss, 23-lateral boss, 24-flow guide channel. DETAILED DESCRIPTION

[0040] like Figure 1-14 As shown, a plate-type pneumatic reversing valve for an oxygen concentrator is provided;

[0041] like Figure 7 As shown, the valve body 1 presents a flat plate structure, and a molecular sieve interface 2, a first vent hole 4a, and a second vent hole 4b are arranged on one side of the valve body 1; there are two first vent holes 4a and two second vent holes 4b. There are two molecular sieve interfaces 2, and the positions of the first vent holes 4a and the second vent holes 4b are as shown in FIG. Fig.13 As shown, the first vent hole 4 a and the second vent hole 4 b are arranged in the middle of the two molecular sieve interfaces 2 and close to the upper and lower ends of the valve body 1 .

[0042] like Fig.12 As shown, two inner cavities 3 are arranged inside the valve body 1 , and the large cavity openings 301 of the inner cavities 3 face the end surface of the valve body 1 .

[0043] Each molecular sieve interface 2 penetrates an inner cavity 3 of the valve body 1, and the first vent hole 4a is connected to the air inlet channel 5 arranged inside the valve body 1. One end of the air inlet channel 5 penetrates the circular hole 6 at the end surface of the valve body 1. The longitudinal orientation of the air inlet channel 5 can be referred to Fig. 9 , Fig.11 It is knowable.

[0044] For example Fig.12 Combined with Fig.10It can be seen that the second vent hole 4b penetrates the high-pressure gas channel 7 provided inside the valve body 1, and the high-pressure gas channel 7 is provided in the middle of the valve body 1. The high-pressure gas channel 7 is connected to the high-pressure air inlet interface 8, and a crescent hole 10 is formed at the high-pressure air inlet interface 8, and the crescent hole 10 is respectively connected to the two inner cavities 3 inside the valve body 1. Both ends of the gas channel 7 are sealed by a spherical plug 9, and a through hole 11 is formed at the gas channel 7 and the inner cavity 3 of the valve body 1, and the through hole 11 is connected to the two inner cavities 3 inside the valve body 1.

[0045] like Fig.10 It can be seen that the high-pressure air inlet port 8 is arranged on the other side of the valve body 1 , corresponding to the side of the valve body 1 where the molecular sieve port 2 is located.

[0046] like Figure 8-11 It can be seen that there are two exhaust ports 12, which are respectively arranged above the high-pressure air inlet port 8. Each exhaust port 12 is connected to the inner cavity 3 of the valve body 1, and a crescent hole 10 is formed at the intersection of the exhaust port 12 and the inner cavity.

[0047] like Figure 1-7 As shown, a plate-type pneumatic reversing valve for an oxygen concentrator includes a valve core assembly 13 arranged in two inner cavities, a spring 14 is arranged between the inner hole at one end of the valve core assembly and the small cavity opening 302 of the inner cavity 3, an inner sealing end cover 15 is arranged at the large cavity opening 301 of the inner cavity 3 of the valve body 1, the other end of the valve core assembly 13 is connected to a pressure plate 16, a diaphragm 17 is connected between the bottom end of the inner sealing end cover 15 and the base 18, the inner sealing end cover 15 and the inner cavity 3 are sealed and connected by a sealing member 19, and the base 18 is bolted to the end of the valve body. A joint body 20 is arranged at the molecular sieve interface 2 of the valve body 1, and a solenoid valve 21 is connected to the valve body 1, and corresponds to the positions of the first vent hole 4a and the second vent hole 4b arranged on the valve body 1.

[0048] Thus, compared with the prior art, by arranging the solenoid valve on the valve body 1, its overall height is reduced. At the same time, the high-pressure gas channel 7 is arranged in the middle of the valve body 1, and the high-pressure gas channel 7 is connected with the high-pressure air inlet interface 8, that is, the two ends of the high-pressure gas channel 7 are perpendicular to the molecular sieve interface 2, the high-pressure air inlet interface 8, and the exhaust interface 12, so that the overall length and width dimensions are compressed, thereby achieving a reduction in the volume of the pneumatic reversing valve, which is used to adapt to the use of a small and portable oxygen concentrator.

[0049] like Figure 2 , Fig.14It can be seen that a longitudinal boss 22 is provided on the surface of the valve body 1 near the first vent hole 4a, and a transverse boss 23 is provided on the surface of the valve body 1 near the second vent hole 4b. After the solenoid valve 21 is installed, it is respectively fitted with the longitudinal boss 22 and the transverse boss 23. The longitudinal boss 22 and the transverse boss 23 are used to limit the position of the solenoid valve after installation. At the same time, in the later use, the solenoid valve 21 is prevented from being impacted when the air pressure in the valve body 1 changes and the size of the air flow changes, so that the solenoid valve can work stably.

[0050] The working principle of the utility model is:

[0051] When the reversing valve is in the initial start-up state, both solenoid valves 21 are open, and gas is input into both gas paths. This process is a stamping process, and the molecular sieve tubes of the two oxygen generators are pressurized to ensure efficiency.

[0052] When the initial start-up state of the reversing valve is completed, the two solenoid valves are in an alternating working state, that is, one solenoid valve 21 is opened and the other solenoid valve 21 is closed.

[0053] The electromagnetic valves 21 at the first vent 4a and the second vent 4b at the two locations work alternately, that is, when the electromagnetic valve 21 at one of the first vent 4a and the second vent 4b is powered on, the electromagnetic valve 21 at the other first vent 4a and the second vent 4b is powered off, so as to control the working modes of the reversing valves respectively.

[0054] The solenoid valves 21 at the first vent hole 4a and the second vent hole 4b work synchronously, that is, the two solenoid valves 21 are both powered on or off synchronously.

[0055] like Figure 4 As shown, when the electromagnetic valve 21 is powered off, the first vent hole 4a is closed by the electromagnetic valve 21, and the second vent hole 4b is opened by the electromagnetic valve 21, and the high-pressure gas enters the intake channel 7 through the high-pressure intake interface 8. Fig.10 , Fig.12 It can be seen that, since the high-pressure gas channel 7 is connected with the high-pressure air inlet interface 8, a crescent hole 10 is formed at the high-pressure air inlet interface 8, and the crescent hole 10 is respectively connected with the two inner cavities 3 inside the valve body 1. Both ends of the gas channel 7 are sealed by spherical plugs 9, and the gas channel 7 and the inner cavity 3 of the valve body 1 are connected to form a through hole 11, and the through hole 11 is connected with the two inner cavities 3 inside the valve body 1.

[0056] Therefore, the high-pressure gas enters the two inner cavities 3 of the valve body 1 along the intersecting hole 11, and under the action of the gas pressure,

[0057] The valve core components 13 in the two inner cavities 3 move toward the base 18 respectively, so that the seal 19 on the valve core component 13 fits with the inner sealing end cover 15. At this time, the valve core component 13 is separated from one side of the inner cavity 3, so that the high-pressure gas is discharged from the molecular sieve interface 2 to the molecular sieve, so that the molecular sieve tank is quickly pressurized, and the adsorption capacity of the molecular sieve is improved, thereby generating high-concentration oxygen to enter the oxygen concentrator. The beneficial effect is that since the two second vents 4b are both arranged on the air inlet channel 7, and each second vent 4b is independently controlled by the solenoid valve 21 where it is located, the pressure stability and flow rate constancy of the high-pressure gas in the air inlet channel 7 can be better guaranteed.

[0058] When the solenoid valve 21 is energized, the first vent 4a is opened by the solenoid valve 21, and the second vent 4b is closed by the solenoid valve 21. High-pressure gas enters from the high-pressure air inlet interface 8, enters the first vent 4a through the solenoid valve 21, and comes to the guide channel 24 of the base 18 along the air inlet channel 5, and comes to the inner cavity 3 along the guide channel 24. Under the action of air pressure, the high-pressure gas lifts the diaphragm 17, and the diaphragm 17 pushes the pressure plate 16 to make the valve core assembly 13 overcome the initial preload force of the spring 14, so that the seal 19 on the valve core assembly 13 fits with the other side of the inner cavity 3, so that the high-pressure gas channel 7 is closed. At this time, the high-pressure gas in the inner cavity 3 is discharged to the molecular sieve through the exhaust interface 12. The molecular sieve tank after exhaust quickly reduces the pressure and obtains high-concentration oxygen. Such a switching cycle realizes a continuous oxygen supply process.

[0059] The present invention is not limited to the precise structure described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present invention is limited only by the appended claims.

Claims

1. A plate-type pneumatic reversing valve for an oxygen concentrator, comprising a valve core assembly (13), wherein the valve core assembly is respectively arranged in two inner cavities (3) of a valve body (1), a spring (14) arranged between an inner hole at one end of the valve core assembly and a small cavity opening (302) of the inner cavity (3), an inner sealing end cover (15) arranged at a large cavity opening (301) of the inner cavity (3) of the valve body (1), a pressure plate (16) arranged at the other end of the valve core assembly (13), a diaphragm (17) arranged between the bottom end of the inner sealing end cover (15) and a base (18), a sealing member (19) arranged between the inner sealing end cover (15) and the inner cavity (3), and a connector body (20) arranged at a molecular sieve interface (2) of the valve body (1), characterized in that: It also includes a solenoid valve (21) which is arranged on the valve body (1) and corresponds to the positions of the first vent hole (4a) and the second vent hole (4b) of the valve body (1).

2. The plate-type pneumatic reversing valve for an oxygen concentrator according to claim 1, characterized in that: Two molecular sieve interfaces (2), a first vent hole (4a), and a second vent hole (4b) are provided on one side of the valve body (1).

3. The plate-type pneumatic reversing valve for an oxygen concentrator according to claim 1, characterized in that: A high-pressure air inlet interface (8) and two exhaust interfaces (12) are provided on one side of the valve body (1); the two exhaust interfaces (12) are respectively provided above the high-pressure air inlet interface (8), each exhaust interface (12) is respectively connected to the inner cavity (3) of the valve body (1), and a crescent hole (10) is formed at the intersection of the exhaust interface (12) and the inner cavity (3).

4. The plate-type pneumatic reversing valve for an oxygen concentrator according to claim 1, characterized in that: The molecular sieve interfaces (2) each penetrate an inner cavity (3) of a valve body (1).

5. The plate-type pneumatic reversing valve for an oxygen concentrator according to claim 1, characterized in that: There are two first ventilation holes (4a) and two second ventilation holes (4b).

6. The plate-type pneumatic reversing valve for an oxygen concentrator according to claim 1, characterized in that: The first vent hole (4a) and the second vent hole (4b) are arranged in the middle of the two molecular sieve interfaces (2) and close to the upper and lower ends of the valve body (1).

7. The plate-type pneumatic reversing valve for an oxygen concentrator according to claim 1, characterized in that: The first vent hole (4a) is connected to an air intake passage (5) arranged inside the valve body (1), and one end of the air intake passage (5) is connected to a circular hole (6) at the end surface of the valve body (1).

8. The plate-type pneumatic reversing valve for an oxygen concentrator according to claim 1, characterized in that: The second vent hole (4b) passes through a high-pressure gas channel (7) provided inside the valve body (1); The high-pressure gas channel (7) is arranged in the middle of the valve body (1), the high-pressure gas channel (7) is connected to the high-pressure gas inlet interface (8), and a crescent hole (10) is formed at the high-pressure gas inlet interface (8), and the crescent hole (10) is respectively connected to the two inner cavities 3 inside the valve body (1); The gas channel (7) and the inner cavity (3) of the valve body (1) are intersected to form a through hole (11), and the through hole (11) is intersected with the two inner cavities (3) inside the valve body (1).

9. The plate-type pneumatic reversing valve for an oxygen concentrator according to claim 1, characterized in that: The large cavity openings (301) of the two inner cavities (3) inside the valve body (1) face the end surface of the valve body (1).

10. The plate-type pneumatic reversing valve for an oxygen concentrator according to claim 1, characterized in that: A longitudinal boss (22) is provided on the surface of the valve body (1) near the first vent hole (4a), and a transverse boss (23) is provided on the surface of the valve body (1) near the second vent hole (4b), and the solenoid valve (21) is respectively fitted with the longitudinal boss (22) and the transverse boss (23).

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