Integrated air intake assembly for a hand-held oxygen concentrator

Abstract

The utility model discloses a hand -held oxygen generator's integrated type air intake subassembly of oxygen generating equipment field, including air flue board, first solenoid valve and second solenoid valve, be equipped with air intake passage, connecting channel and exhaust passage on air flue board, the number of connecting channel is two, is connected with air intake passage and exhaust passage through first solenoid valve and second solenoid valve respectively, when the power of first solenoid valve and second solenoid valve is off, corresponding connecting channel is communicated with air intake passage, when the power is on, corresponding connecting channel is communicated with exhaust passage. The utility model discloses through the structural design to air intake passage, connecting channel and exhaust passage, make two molecular sieve tank share air intake passage and exhaust passage to reduce the air flue number, make the structure more compact and simple, and under the cooperation of solenoid valve and air flue structure, when the equipment is in the closed state, the air intake end of two molecular sieve tanks is cut off with outside through air flue board and solenoid valve, can avoid the problem that molecular sieve inhales the moisture failure.

Description

Technical Field

[0001] This utility model relates to the field of oxygen generation equipment, and in particular to an integrated air intake component for a handheld oxygen generator. Background Technology

[0002] Most portable oxygen concentrators currently use pressure swing adsorption (PSA) gas separation to produce oxygen. Molecular sieves are the core functional component in this separation process. The principle is that under certain pressure, the molecular sieve adsorbs nitrogen from the air to collect oxygen. When the pressure decreases, the adsorbed nitrogen is desorbed, regenerating the molecular sieve. To achieve continuous oxygen production, two molecular sieve tanks are generally used: one absorbs nitrogen for oxygen production, and the other releases nitrogen for desorption. These two tanks operate alternately to achieve continuous oxygen extraction and delivery. Therefore, the air intake assembly between the air pump and the molecular sieve tank needs to alternately perform air intake and exhaust processes, mainly achieved by solenoid valves. Currently, many oxygen concentrators connect the molecular sieve tanks and solenoid valves through pipelines, and the pipelines on the two molecular sieve tanks are independent, resulting in numerous pipelines and a large space occupation within the equipment. There are also some integrated gas passage structures, such as the patent document with publication number CN218237063U, which discloses an internal gas passage structure formed by upper and lower shells. Although the gas passage is relatively compact, the arrangement of the solenoid valve and the gas passage occupies a large vertical space, and it does not consider the problem that the molecular sieve tank will absorb moisture and fail when it comes into contact with air through the gas passage in the power-off state. Utility Model Content

[0003] To overcome the shortcomings of existing oxygen concentrator air intake components, such as large space occupation and poor protection effect on molecular sieves, the technical problem to be solved by this utility model is to provide an integrated air intake component for a handheld oxygen concentrator with a compact structure that can isolate the molecular sieve tank from the external gas in the closed state.

[0004] The technical solution adopted by this utility model to solve its technical problem is: The integrated air intake assembly of a handheld oxygen concentrator includes an air duct plate, a first solenoid valve, and a second solenoid valve. The air duct plate has mutually isolated air intake channels, connecting channels, and exhaust channels. There are two connecting channels, with their intake ends connected to the air intake and exhaust channels respectively via the first and second solenoid valves. When the first and second solenoid valves are de-energized, the corresponding connecting channel is connected to the air intake channel; when energized, the corresponding connecting channel is connected to the exhaust channel. The air intake assembly primarily connects the air pump to two molecular sieve tanks, delivering the gas generated by the air pump into the molecular sieve tanks while simultaneously expelling the desorbed gas from the molecular sieve tanks. This design, through the structural design of the air intake, connecting, and exhaust channels, allows the two molecular sieve tanks to share the air intake and exhaust channels, thereby reducing the number of air ducts, making the structure more compact, reducing the overall thickness of the air intake assembly, and avoiding external air pipe connections, enabling integrated assembly within a very small space. Both the first and second solenoid valves are normally closed and are in a closed state when the power is off. Combined with the air duct structure isolation arrangement, when the equipment is in the closed state, the air inlet ends of the two molecular sieve tanks are in a sealed state, forming a state of isolation from the outside, avoiding the problem of the molecular sieve tanks absorbing moisture and failing due to contact with the outside air through the exhaust port.

[0005] To facilitate connection between the duct plate and other equipment, the duct plate is equipped with an air inlet, an air outlet, and two air outlets. The air inlet is connected to the air intake channel, the air outlet is connected to the air exhaust channel, and the two air outlets are respectively connected to the air outlet ends of two connecting channels. The air inlet is used to connect to an air pump, allowing the gas generated by the air pump to enter the air intake channel. The two air outlets are respectively connected to the air inlet ends of the two molecular sieve tanks. The air outlets are used to discharge the desorption gas from the molecular sieve tanks from the air intake assembly.

[0006] The intake channel, connecting channel, and exhaust channel are all groove structures located on the side of the air duct plate. The air duct plate is provided with a sealing plate for sealing the groove structures. Both the first and second solenoid valves are fixed to the sealing plate. The sealing plate has through holes communicating with the interfaces of the first and second solenoid valves. This combination of grooves and a sealing plate reduces the design, processing, and assembly difficulty of the air duct, thus reducing costs. Furthermore, laying the two solenoid valves flat on the side of the air duct plate reduces the overall thickness of the intake assembly.

[0007] Since the solenoid valve has a certain height and the arrangement of each interface is usually quite regular, in order to be compatible with the solenoid valve, the intake channel, exhaust channel and connecting channel are arranged in parallel from bottom to top along the height direction of the air duct plate. The end of the intake channel and the intake end of the connecting channel are bent upward and downward respectively to be flush with the end of the exhaust channel.

[0008] To ensure that the two molecular sieve tanks operate in the same manner, the air inlet channel, exhaust channel, and connecting channel are all symmetrically arranged with the central axis of the air duct plate as the axis of symmetry. The exhaust channel has a guide hole in the middle that communicates with the exhaust port. In this way, the air inlet and exhaust paths of the two molecular sieve tanks are the same, which is conducive to the continuous and stable operation of the equipment.

[0009] The valve bodies of the first and second solenoid valves include three channels, wherein channel a is connected to the air inlet end of the connecting channel, channel b is connected to the end of the air inlet channel, and channel c is connected to the end of the exhaust channel. The two working positions of the valve body are respectively channel a connected to channel b and channel a connected to channel c.

[0010] To achieve miniaturization and compactness of the entire oxygen generator, the air intake assembly can be integrated into the air pump assembly. The air pump assembly includes an air pump bracket and an air pump located within the air pump bracket. The air duct plate, the first solenoid valve, and the second solenoid valve are all mounted on the top plate of the air pump bracket. The gas outlet of the air pump is connected to the air inlet of the air duct plate through a pipe. An opening is provided on the top plate at a position corresponding to the exhaust port.

[0011] Furthermore, the base plate of the air pump bracket has an upwardly protruding filter chamber, and the top of the filter chamber has an air inlet grille. One end of the filter chamber is connected to the gas inlet of the air pump through an air inlet pipe. The bottom surface of the top plate of the air pump bracket has an air guide channel, one end of which is connected to the opening, and the other end extends to the side of the air pump bracket away from the filter chamber, where a nitrogen vent is located. By using the air guide channel to position the nitrogen vent far away from the filter chamber both horizontally and vertically, the mutual interference between air intake and exhaust can be reduced, ensuring oxygen production efficiency.

[0012] The beneficial effects of this utility model are as follows: by laying the two solenoid valves flat on the front of the air duct plate, the vertical space occupied by the air intake component can be reduced, which is conducive to the miniaturization of the oxygen generator. In addition, through the structural design of the air intake channel, connecting channel and exhaust channel, the two molecular sieve tanks share the air intake channel and exhaust channel, thereby reducing the number of air channels and making the structure more compact and simple. Furthermore, with the cooperation of the solenoid valves and the air channel structure, when the equipment is in the closed state, the air intake end of both molecular sieve tanks is connected to the air pump, avoiding the problem of the molecular sieve tanks absorbing moisture and failing due to contact with the outside air through the exhaust port. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the air intake assembly of this utility model; Figure 2 yes Figure 1 Sectional view of AA; Figure 3 yes Figure 1 BB section view; Figure 4 This is a schematic diagram of the installation structure of the air intake assembly and air pump bracket of this utility model; Figure 5 This is a top view of the air pump bracket of this utility model; Figure 6 This is the front view of the air pump bracket of this utility model.

[0014] The diagram is labeled as follows: 1-First solenoid valve, 2-Second solenoid valve, 3-Air duct plate, 4-Sealing plate, 5-Air pump bracket, 6-Air pump, 11-Channel a, 12-Channel b, 13-Channel c, 31-Inlet channel, 32-Connecting channel, 33-Exhaust channel, 34-Inlet port, 35-Exhaust port, 36-Outlet port, 37-Guide hole, 51-Top plate, 52-Opening, 53-Bottom plate, 54-Filter chamber, 55-Inlet grille, 56-Inlet pipe, 57-Guide channel, 58-Nitrogen vent, 61-Gas outlet. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings.

[0016] It should be noted that if this utility model contains directional indicators such as up, down, left, right, front, and back, these terms are used to describe the relative positional relationships between components and are not specific references to the absolute positions of the components or the relationships between them. They are only used to explain the relative positional relationships and movement of the components in a specific posture. If the specific posture changes, the directional indicator will also change accordingly. If this utility model contains terms related to quantity such as "many," "multiple," or "several," these terms specifically refer to two or more.

[0017] like Figure 1 , Figure 2As shown, the integrated air intake assembly of a handheld oxygen concentrator provided by this utility model includes an air duct plate 3, a first solenoid valve 1, and a second solenoid valve 2. The air duct plate 3 is provided with mutually isolated air intake channels 31, connecting channels 32, and exhaust channels 33. There are two connecting channels 32. The air intake ends of the two connecting channels 32 are respectively connected to the air intake channel 31 and the exhaust channel 33 through the first solenoid valve 1 and the second solenoid valve 2. When the first solenoid valve 1 and the second solenoid valve 2 are de-energized, the corresponding connecting channel 32 is connected to the air intake channel 31; when energized, the corresponding connecting channel 32 is connected to the exhaust channel 33. To facilitate the connection of the air duct plate 3 with other devices, the air duct plate 3 is provided with an air inlet 34, an exhaust outlet 35, and two air outlets 36. The air inlet 34 is connected to the air intake channel 31, the exhaust outlet 35 is connected to the exhaust channel 33, and the two air outlets 36 are respectively connected to the air outlet ends of the two connecting channels 32. The air inlet 34 is used to connect to the air pump, allowing the gas generated by the air pump to enter the air inlet channel 31. Two air outlets 36 are used to connect to the air inlets of the two molecular sieve tanks respectively, supplying gas to the molecular sieve tanks. The exhaust port 35 is used to discharge the desorption gas from the molecular sieve tanks out of the air inlet assembly.

[0018] The working process of this utility model is as follows: Figure 2 As shown, when both the first solenoid valve 1 and the second solenoid valve 2 are de-energized, the left and right connecting channels 32 are connected to the air intake channel 31 through the corresponding first solenoid valve 1 and second solenoid valve 2, respectively. The air intake channel 31 is connected to the compressed air pump through the air intake port 34. Therefore, when the oxygen generator is not working, external air cannot enter the compressed air pump and thus cannot enter the molecular sieve tank through the air intake assembly. This avoids the problem of the molecular sieve absorbing moisture and failing due to contact with external air through the exhaust port 35. When the oxygen concentrator is working, the first solenoid valve 1 and the second solenoid valve 2 are alternately energized and de-energized. For example, when the first solenoid valve 1 is de-energized and the second solenoid valve 2 is energized, the left connecting channel 32 is connected to the air intake channel 31, and the right connecting channel 32 is connected to the exhaust channel 33. The compressed gas generated by the air pump enters the first molecular sieve tank through the air intake port 34, the air intake channel 31, the left connecting channel 32, and the left air outlet 36 in sequence. Nitrogen is adsorbed, and the remaining oxygen-enriched gas exits the first molecular sieve tank. Most of the gas enters the oxygen storage tank, and a small portion enters the second molecular sieve tank. This portion of gas then enters the exhaust port 35 through the right air outlet 36, the right connecting channel 32, and the exhaust channel 33 in sequence, backwashing the second molecular sieve tank. The first solenoid valve 1 and the second solenoid valve 2 operate alternately according to the above process, thereby achieving continuous air intake, exhaust, and exhaust of the two molecular sieve tanks, and thus continuous oxygen production.

[0019] This invention reduces the vertical space occupied by the air intake assembly by laying the first solenoid valve 1 and the second solenoid valve 2 flat on the front of the air duct plate 3, which is beneficial to the miniaturization of the oxygen generator. In addition, through the structural design of the air intake channel 31, the connecting channel 32 and the exhaust channel 33, the two molecular sieve tanks share the air intake channel 31 and the exhaust channel 32, thereby reducing the number of air ducts and making the structure more compact and simple. Furthermore, with the cooperation of the solenoid valves and the air duct structure, when the equipment is in the closed state, the compressed air pump is also in the closed state. The air intake ends of the two molecular sieve tanks are connected to the compressed air pump, thus avoiding the problem of the molecular sieve tanks absorbing moisture and failing due to contact with the outside air through the exhaust port 35.

[0020] To facilitate the installation of channel structures on the air duct plate 3, a preferred embodiment of this invention is that a sealing plate 4 is provided between the first solenoid valve 1 and the second solenoid valve 2 and the side of the air duct plate 3. The air intake channel 31, the connecting channel 32, and the exhaust channel 33 are all grooves provided on the side of the air duct plate 3, which cooperate with the sealing plate 4 to form a channel structure. This allows for easy machining of various air passages on the air duct plate 3 using a milling cutter, reducing production costs. The sealing plate 4 has through holes at positions corresponding to the solenoid valve interfaces. The first solenoid valve 1 and the second solenoid valve 2 are fixedly connected to the air duct plate 3 with screws to ensure the sealing effect between the sealing plate 4 and the air duct plate 3. The air inlet 34, the exhaust outlet 35, and the air outlet 36 are all exposed interface structures on the surface of the air duct plate 3, which are connected to the corresponding air intake channel 31, exhaust channel 33, and connecting channel 32 by drilling, facilitating docking with other equipment.

[0021] Since the solenoid valve itself has a certain height, to avoid wasting space, the air duct plate 31 can be set to the same height as the solenoid valve. Then, the intake channel 31, exhaust channel 33, and connecting channel 32 are arranged parallel to each other from bottom to top along the height direction of the air duct plate 31, with the two connecting channels 32 located at opposite ends of the intake channel 31. Additionally, as... Figure 2 , Figure 3 As shown, in order to be compatible with the interface of the solenoid valve, the end of the intake passage 31 and the intake end of the connecting passage 32 can be bent upward and downward respectively to be flush with the end of the exhaust passage 33.

[0022] Furthermore, the air inlet channel 31, the exhaust channel 33, and the connecting channel 32 are all symmetrically arranged with the central axis of the air duct plate 3 as the axis of symmetry. The exhaust channel 33 has a guide hole 37 in the middle that communicates with the exhaust port 35. The symmetrical air duct structure ensures that the air inlet and exhaust paths of the two molecular sieve tanks are the same, ensuring that they are in the same working state, which is conducive to the continuous and stable operation of the equipment.

[0023] Regarding the specific connection method between the solenoid valve and the air passage plate 3, as follows: Figure 2 , Figure 3 As shown, the first solenoid valve 1 and the second solenoid valve 2 are both two-position three-way valves. The valve body includes three channels, wherein channel a11 is connected to the air inlet end of the connecting channel 32, channel b12 is connected to the end of the air inlet channel 31, and channel c13 is connected to the end of the exhaust channel 33. The two working positions of the valve body are respectively channel a11 connected to channel b12 and channel a11 connected to channel c13.

[0024] Because the intake assembly needs to be connected to the compressed air pump, the intake assembly can be integrated with the air pump assembly, such as... Figures 4 to 6 As shown, the air pump bracket 5 adopts an upper and lower support structure. The air pump 6 is located inside the air pump bracket 5. The air duct plate 3, the first solenoid valve 1 and the second solenoid valve 2 are all set on the top plate 51 of the air pump bracket 5. The gas outlet 61 of the air pump 6 is connected to the air inlet 34 of the air duct plate 3 through a pipe. An opening 52 is provided on the top plate 51 at a position corresponding to the exhaust port 35. When backwashing the molecular sieve tank, the gas is discharged outward from the opening 52.

[0025] Furthermore, if the exhaust port 35 is too close to the air inlet of the air pump 6, it will reduce the oxygen content of the inhaled air and affect the oxygen production efficiency. Therefore, the preferred solution is that the base plate 53 of the air pump bracket 5 is provided with an upwardly protruding filter chamber 54, the top of the filter chamber 54 is provided with an air inlet grille 55, one end of the filter chamber 54 is connected to the gas inlet of the air pump 6 through an air inlet pipe 56, and the bottom surface of the top plate 51 of the air pump bracket 5 is provided with an air guide channel 57. One end of the air guide channel 57 is connected to the opening 52, and the other end extends to the side of the air pump bracket 5 away from the filter chamber 54, and is provided with a nitrogen vent 58. By using the air guide channel 57 to set the nitrogen vent 58 at a position that is far away from the filter chamber 54 both horizontally and vertically, the mutual interference between air intake and exhaust can be reduced, ensuring oxygen production efficiency.

Claims

1. An integrated air intake assembly for a handheld oxygen concentrator, characterized in that: It includes an air duct plate (3), a first solenoid valve (1) and a second solenoid valve (2). The air duct plate (3) is provided with an air intake channel (31), a connecting channel (32) and an exhaust channel (33) that are isolated from each other. There are two connecting channels (32). The air intake ends of the two connecting channels (32) are connected to the air intake channel (31) and the exhaust channel (33) respectively through the first solenoid valve (1) and the second solenoid valve (2). When the first solenoid valve (1) and the second solenoid valve (2) are de-energized, the corresponding connecting channel (32) is connected to the air intake channel (31). When energized, the corresponding connecting channel (32) is connected to the exhaust channel (33).

2. The integrated air intake assembly of the handheld oxygen concentrator as described in claim 1, characterized in that: The air duct plate (3) is provided with an air inlet (34), an exhaust outlet (35) and two air outlets (36). The air inlet (34) is connected to the air inlet channel (31), the exhaust outlet (35) is connected to the exhaust channel (33), and the two air outlets (36) are respectively connected to the air outlets of the two connecting channels (32).

3. The integrated air intake assembly of the handheld oxygen concentrator as described in claim 1, characterized in that: The intake channel (31), the connecting channel (32) and the exhaust channel (33) are all groove structures provided on the side of the air duct plate (3). The side of the air duct plate (3) is provided with a sealing plate (4) for sealing the groove structure. The first solenoid valve (1) and the second solenoid valve (2) are both fixed on the sealing plate (4). The sealing plate (4) is provided with a through hole that communicates with the interface of the first solenoid valve (1) and the second solenoid valve (2).

4. The integrated air intake assembly of the handheld oxygen concentrator as described in claim 3, characterized in that: The intake channel (31), exhaust channel (33) and connecting channel (32) are arranged in parallel from bottom to top along the height direction of the air duct plate (3). The two connecting channels (32) are located at both ends of the intake channel (31). The end of the intake channel (31) and the intake end of the connecting channel (32) are bent upward and downward respectively to be flush with the end of the exhaust channel (33).

5. The integrated air intake assembly of the handheld oxygen concentrator as described in claim 4, characterized in that: The intake channel (31), exhaust channel (33) and connecting channel (32) are all symmetrically arranged with the central axis of the air duct plate (3) as the axis of symmetry. The exhaust channel (33) has an air guide hole (37) in the middle that is connected to the exhaust port (35).

6. The integrated air intake assembly of the handheld oxygen concentrator as described in any one of claims 1-5, characterized in that: The first solenoid valve (1) and the second solenoid valve (2) are both two-position three-way valves. The valve body includes three channels, wherein channel a (11) is connected to the air inlet end of the connecting channel (32), channel b (12) is connected to the end of the air inlet channel (31), and channel c (13) is connected to the end of the exhaust channel (33). The two working positions of the valve body are respectively channel a (11) and channel b (12) connected, and channel a (11) and channel c (13) connected.

7. The integrated air intake assembly of the handheld oxygen concentrator as described in claim 2, characterized in that: It also includes an air pump bracket (5) and an air pump (6) located inside the air pump bracket (5). The air duct plate (3), the first solenoid valve (1) and the second solenoid valve (2) are all installed on the top plate (51) of the air pump bracket (5). The gas outlet (61) of the air pump (6) is connected to the air inlet (34) of the air duct plate (3) through a pipe. An opening (52) is provided on the top plate (51) at a position corresponding to the exhaust port (35).

8. The integrated air intake assembly of the handheld oxygen concentrator as described in claim 7, characterized in that: The bottom plate (53) of the air pump bracket (5) is provided with an upwardly protruding filter chamber (54). The top of the filter chamber (54) is provided with an air inlet grille (55). One end of the filter chamber (54) is connected to the gas inlet of the air pump (6) through an air inlet pipe (56). The bottom surface of the top plate (51) of the air pump bracket (5) is provided with an air guide channel (57). One end of the air guide channel (57) is connected to the opening (52), and the other end extends to the side of the air pump bracket (5) away from the filter chamber (54), and a nitrogen discharge port (58) is provided at this end.

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