CN115105898B

CN115105898B - Oxygen concentrator

Info

Publication number: CN115105898B
Application number: CN202210730911.4A
Authority: CN
Inventors: 汪佳贵; 张文亮
Original assignee: Feiyinuo Technology Co ltd
Current assignee: Feiyinuo Technology Co ltd
Priority date: 2022-06-24
Filing date: 2022-06-24
Publication date: 2024-04-30
Anticipated expiration: 2042-06-24
Also published as: CN115105898A

Abstract

The utility model provides an oxygen concentrator, includes the shell that forms the installation space and sets up the inner shell in the installation space, inner shell and shell mutually support in order to separate the installation space into air inlet chamber and air-out chamber, the shell has the air intake of intercommunication air inlet chamber, oxygen concentrator still includes the connection shell and with air intake matched with air inlet structure, air inlet structure includes the drainage cover that covers in the air intake at least partially, the first air inlet channel of intercommunication air intake, the drainage cover sets up with the shell terminal surface interval at air intake place to form the second air inlet channel of intercommunication first air inlet channel with between the shell, the extending direction of first air inlet channel is the setting of certain angle with the extending direction of second air inlet channel; dust particles can settle between the first air inlet channel and the second air inlet channel, so that normal operation of internal working elements is prevented from being influenced by entering the shell, and the service life is prolonged.

Description

Oxygen concentrator

Technical Field

The invention relates to an oxygen-nitrogen separation device, in particular to an oxygen concentrator.

Background

The oxygen-nitrogen separation device is a device for separating nitrogen and oxygen in air, and is divided into a nitrogen generator and an oxygen generator, wherein the oxygen generator is also called an oxygen concentrator, and the oxygen concentrator is equipment capable of providing high-concentration oxygen for people to breathe, and generally consists of a compressor device, an adsorption tower part, a reversing device, a storage device and a circuit control device, and the PSA pressure swing adsorption principle is applied, so that the reversing device distributes gas flow direction, and finished gas is collected to the storage device through the adsorption tower part, thereby realizing continuous oxygen output.

In the working process of the existing oxygen concentrator, the air inlet is utilized to guide external air into the shell, and because the air inlet adopts a straight through hole structure, when external air directly flows into the shell through the air inlet, dust or particulate matters in the air can be brought in together, so that the normal work of working elements in the shell is influenced, and the service life of the oxygen concentrator is reduced.

Disclosure of Invention

The invention aims to provide an oxygen concentrator with long service life.

In order to achieve one of the above objects, an embodiment of the present invention provides an oxygen concentrator, including an outer shell forming an installation space, and an inner shell disposed in the installation space, wherein the inner shell and the outer shell are mutually matched to partition the installation space into an air inlet cavity and an air outlet cavity, the outer shell has an air inlet communicating with the air inlet cavity, the oxygen concentrator further includes an air inlet structure connected with the outer shell and matched with the air inlet, the air inlet structure includes a drainage cover at least partially covering the air inlet, a first air inlet channel communicating with the air inlet, the drainage cover is disposed at intervals with an end surface of the outer shell where the air inlet is located, and a second air inlet channel communicating with the first air inlet channel is formed between the drainage cover and the outer shell, and an extending direction of the first air inlet channel and an extending direction of the second air inlet channel are disposed at a certain angle.

As a further improvement of an embodiment of the present invention, the extending direction of the second air inlet channel is parallel to the end face of the housing where the air inlet is located.

As a further improvement of an embodiment of the present invention, the drainage cover has a mounting portion matching with the air inlet and a drainage portion connected to an end portion of the mounting portion, the drainage portion is circumferentially disposed on an edge of the mounting portion and covers an outer side of the air inlet, and the second air inlet channel is formed between the drainage portion and an end surface where the air inlet is located.

As a further improvement of an embodiment of the present invention, the drainage portion includes a first end connected to the mounting portion and a second end extending away from the first end, and a distance between the drainage portion and the end surface where the air inlet is located gradually decreases from the first end toward the second end.

As a further improvement of an embodiment of the invention, the air inlet structure comprises a first drainage piece connected with the shell and extending towards the drainage cover, and a second drainage piece connected with the drainage cover and matched with the first drainage piece, wherein the first drainage piece and the second drainage piece are arranged at intervals, the first air inlet channel is formed between the first drainage piece and the second drainage piece, and the extending direction of the first air inlet channel is perpendicular to the end face of the shell where the air inlet is located.

As a further improvement of an embodiment of the invention, the first drainage piece and the drainage cover are arranged at intervals, an air inlet gap for communicating the first air inlet channel and the second air inlet channel is formed between the first drainage piece and the drainage cover, one end of the second drainage piece is connected with the drainage cover, and the other end extends towards the inside of the first drainage piece.

As a further improvement of an embodiment of the present invention, the first drainage member has a connection end connected to an edge of the air inlet hole and an extension end facing away from the connection end and extending toward the drainage portion, the air inlet gap is formed between the extension end and the drainage portion, and a distance between the extension end and an end face where the air inlet is located is greater than a distance between the second end and an end face where the air inlet is located.

As a further improvement of an embodiment of the invention, the air inlet structure further comprises a first mounting piece connected with the first drainage piece and a second mounting piece connected with the first mounting piece and the drainage cover, wherein the first mounting piece is positioned on the inner side of the first drainage piece, and the second mounting piece is positioned on the inner side of the second drainage piece.

As a further improvement of an embodiment of the present invention, the drainage cover further has a first installation groove and a second installation groove which are disposed on the installation portion and are recessed toward the inside of the installation space, the first installation groove is provided with an air inlet pipe and an air outlet pipe which are communicated with the installation space, and the second installation groove is provided with an atomization pipe which is communicated with the installation space.

As a further improvement of an embodiment of the invention, the outer shell is also provided with an air outlet communicated with the air outlet cavity, the air outlet cavity comprises a compressor cavity formed in the inner shell and a guide cavity communicated with the compressor cavity and the air outlet, the guide cavity comprises a first reversing air channel in butt joint with the air outlet and a second reversing air channel communicated with the first reversing air channel and the compressor cavity, the extending direction of the first reversing air channel is obliquely arranged relative to the end face of the outer shell where the air outlet is located, and the extending direction of the first reversing air channel and the extending direction of the second reversing air channel are arranged at a certain angle.

Compared with the prior art, in the embodiment of the invention, the air inlet structure is arranged, so that external air flows into the shell sequentially through the second air inlet channel, the first air inlet channel and the air inlet, and as a certain included angle exists between the extending direction of the first air inlet channel and the extending direction of the second air inlet channel, dust particles can be settled between the first air inlet channel and the second air inlet channel, the normal work of internal working elements is prevented from being influenced when the dust particles enter the shell, and the service life is prolonged.

Drawings

FIG. 1 is a schematic perspective view of an oxygen concentrator of a preferred embodiment of the present invention with working elements within the housing removed;

FIG. 2 is an exploded schematic view of the oxygen concentrator of FIG. 1;

FIG. 3 is a schematic plan view of the cross-sectional view at A-A in FIG. 1;

FIG. 4 is an enlarged schematic view of region B of FIG. 3;

FIG. 5 is a schematic perspective view of the oxygen concentrator of FIG. 1 from another perspective, with the base also hidden;

FIG. 6 is a cross-sectional view taken at C-C of FIG. 1;

FIG. 7 is an enlarged schematic view at D in FIG. 3;

fig. 8 is a schematic perspective view of the cross-sectional view at A-A in fig. 1.

Detailed Description

The present invention will be described in detail below with reference to specific embodiments shown in the drawings. These embodiments are not intended to limit the invention and structural, methodological, or functional modifications of these embodiments that may be made by one of ordinary skill in the art are included within the scope of the invention.

It will be appreciated that terms such as "upper," "lower," "outer," "inner," and the like, as used herein, refer to spatially relative positions and are used for ease of description to describe one element or feature's relationship to another element or feature as illustrated in the figures. The term spatially relative position may be intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures.

The device may be otherwise oriented (rotated 90 degrees or other orientations) and the spatially relative descriptors used herein interpreted accordingly. As in the present invention, for convenience of description, the direction toward the ground is downward and the direction away from the ground is upward when the oxygen concentrator is in normal use; the direction parallel to the ground is the horizontal direction or the lateral direction, and the direction perpendicular to the ground is the vertical direction; the side close to the user is the front side, and the side far away from the user is the rear side. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention can be understood as appropriate by those of ordinary skill in the art.

Referring to fig. 1 to 8, a preferred embodiment of the present invention provides an oxygen concentrator including an oxygen concentrator housing and working elements installed in the oxygen concentrator housing, the working elements including but not limited to a compressor, an adsorption tower, a blower, a gas storage tank, and a control circuit, wherein when the oxygen concentrator is operated, the compressor provides compressed air, a reversing device distributes a gas flow direction through a PSA pressure swing adsorption principle, and a finished gas is collected through the adsorption tower to the gas storage tank, thereby realizing continuous oxygen discharge.

Specifically, as shown with reference to fig. 1 and 2 in combination, the oxygen concentrator housing includes an outer shell 20 forming an installation space 10 and an inner shell 30 disposed within the installation space 10. In this embodiment, the outer casing 20 and the inner casing 30 are fixed together by fasteners, so that the working element is ensured to work stably after being mounted in the mounting space 10.

With reference to fig. 3, in detail, the inner case 30 and the outer case 20 cooperate with each other to divide the installation space 10 into an air inlet chamber 11 and an air outlet chamber 13. In this embodiment, after the inner casing 30 and the outer casing 20 are matched with each other, the air inlet cavity 11 and the air outlet cavity 13 are ensured to be separated from each other by fixing the seam allowance and the fastener. The air outside the shell 20 flows into the air inlet cavity 11, flows into the air outlet cavity 13, and is discharged out of the shell 20 after heat exchange is completed.

Further, the housing 20 has an air outlet 21 communicating with the air outlet chamber 13. In this embodiment, the air outlet 21 is disposed on the end face of the housing 20 in a straight penetrating manner, that is, the axis of the air outlet 21 is perpendicular to the end face of the housing 20 where the air outlet 21 is located, so as to save manufacturing cost.

Further, the air outlet chamber 13 includes a compressor chamber 13a formed in the inner casing 30 and a guide chamber 13b communicating the compressor chamber 13a with the air outlet 21. In this embodiment, the compressor is disposed in the compressor chamber 13a, so that the compressor is separated from other components in the installation space 10 by the inner shell 30, and the heat generated by the compressor is prevented from affecting the operation of the other components. The guide chamber 13b guides the air flow containing heat in the compressor chamber 13a to the air outlet 21, and discharges the air flow out of the casing 20 from the air outlet 21.

As shown in fig. 4, the guiding cavity 13b further includes a first reversing air duct 13b1 abutted with the air outlet 21, and an extending direction of the first reversing air duct 13b1 is inclined with respect to an end surface of the housing 20 where the air outlet 21 is located. In this embodiment, the air in the guiding chamber 13b flows to the air outlet 21 through the first reversing air duct 13b1, and is discharged from the air outlet 21 to the outside of the housing 20. The extending direction of the first reversing air duct 13b1 refers to the flowing direction of the air in the first reversing air duct 13b1, that is, the air flow paths of the air inlet end and the air outlet end of the first reversing air duct 13b1, and the extending direction is the same as the extending direction, and will not be described again. The extending direction of the first reversing air duct 13b1 is inclined relative to the end face of the housing 20 where the air outlet 21 is located, which means that the extending direction of the first reversing air duct 13b1 is not perpendicular to the end face of the housing 20 where the air outlet 21 is located.

Because the gas flowing direction in the first reversing air duct 13b1 and the end face of the casing 20 where the air outlet 21 is located are obliquely arranged, the gas flowing out of the first reversing air duct 13b1 flows to objects around the oxygen concentrator at a certain angle, and the gas with heat flowing out of the air outlet 21 is prevented from flowing back against the objects around the oxygen concentrator, so that the heat dissipation effect of the oxygen concentrator is ensured.

Moreover, compared with the prior art, the oxygen concentrator in the embodiment can be closer to surrounding objects in the placing process while the same heat dissipation effect is met, so that the oxygen concentrator is suitable for more use scenes. For example closer to the wall.

After the heat generated in the working process of the oxygen concentrator enters the guide cavity 13b from the compressor cavity 13a, the heat flows to the air outlet 21 through the first reversing air duct 13b1 in the guide cavity 13b and is discharged outside the shell 20, and the hot waste gas discharged outside the shell 20 faces objects around the oxygen concentrator at a certain angle due to the inclined arrangement of the first reversing air duct 13b1 and the end face of the shell 20 where the air outlet 21 is positioned, so that the hot air is prevented from flowing back after encountering the objects, and the heat dissipation effect of the oxygen concentrator is improved.

Further, the guiding chamber 13b further includes a second reversing air duct 13b2 that communicates the first reversing air duct 13b1 with the compressor chamber 13a, and an extending direction of the first reversing air duct 13b1 is disposed at a certain angle with an extending direction of the second reversing air duct 13b 2.

In this embodiment, as shown in fig. 3, when the gas in the compressor chamber 13a flows into the guiding chamber 13b, the gas first enters the second reversing air duct 13b2, flows into the first reversing air duct 13b1 after changing direction, and finally is discharged from the air outlet 21 out of the housing 20. Since the second reversing air duct 13b2 of the guiding cavity 13b and the air flowing direction in the first reversing air duct 13b1 have a certain angle, the noise of the air flowing out of the compressor cavity 13a and flowing out of the air outlet 21 can be reduced, so that the guiding cavity 13b can play a role in reducing the noise.

Moreover, when the oxygen concentrator is in a closed state, external dust or particles enter the first reversing air duct 13b1 through the air outlet 21 due to factors such as air flow, and when the air flows from the first reversing air duct 13b1 to the second reversing air duct 13b2, the dust or particles enter the second reversing air duct 13b2 and lose power to settle due to a certain angle between the first reversing air duct 13b1 and the second reversing air duct 13b2, so that the dust or particles are prevented from further entering the compressor cavity 13a, and the dust or particles are prevented from polluting or damaging working elements of the oxygen concentrator. Similarly, when flying from the first reversing air duct 13b1 to the second reversing air duct 13b2, the small insects stay without turning due to the relation of the included angles between the first reversing air duct 13b1 and the second reversing air duct 13b2, so that the small insects are prevented from entering the compressor cavity 13a. And when the oxygen concentrator is started again, the settled dust and the retained small worms are discharged out of the first reversing air duct 13b1, so that dust particles are prevented from polluting or damaging working elements of the oxygen concentrator.

With continued reference to fig. 2 and 3, in particular, the outer housing 20 includes a base 23 connected to the inner housing 30, an upper cover 25 fixed above the base 23 and spaced apart from the base 23, and a clearance channel 27 formed between the base 23 and the upper cover 25 and located on a lateral end surface of the outer housing 20. In this embodiment, the outer casing 20 is formed by fixedly connecting a base 23 and an upper cover 25, a compressor chamber 13a is formed between the base 23 and the inner casing 30, and the compressor is fixed on the base 23. The base 23 and the upper cover 25 are both formed in an open dish-like structure, and after being matched with each other, a clearance channel 27 is formed on the lateral end face of the housing 20, and the clearance channel 27 surrounds the housing 20 in a horizontal direction for one circle.

Further, the air outlet 21 is formed in the clearance channel 27. In this embodiment, at least a portion of the gap channel 27 is communicated with the first reversing air channel 13b1, so that the air outlet 21 can be formed in the gap channel 27, and thus, no additional through holes are required to be formed on the housing 20, so that the manufacturing cost is saved, and meanwhile, the appearance of the housing 20 is more integral, and the use experience of a user is improved.

Further, the first reversing air duct 13b1 is disposed obliquely upward from the air outlet 21 and into the installation space 10. In this embodiment, as shown in fig. 3, the air outlet 21 is disposed on a lateral end surface of the housing 20, and the flow direction of the air in the first reversing air duct 13b1 is downward and backward. On the one hand, the air flows out of the air outlet 21 obliquely downwards after passing through the first reversing air duct 13b1, and contacts with cold air sunk around the bottom of the oxygen concentrator to realize heat exchange, so that the heat exchange between the cold air and the hot air around the oxygen concentrator is accelerated. On the other hand, the gas flows out to the rear of the oxygen concentrator after passing through the first reversing air duct 13b1 and is far away from one end of the user, so that the use experience of the user is improved. Moreover, the inclined downward first reversing air duct 13b1 can also prevent liquid from flowing from the open air outlet 21 to the second reversing air duct 13b2 and into the compressor chamber 13a.

Of course, in some embodiments, the air outlet 21 may be disposed on an upper end surface or a lower end surface of the housing, as long as the extending direction of the first reversing air duct 13b1 and the end surface are inclined to each other.

Further, as shown in fig. 2, the housing 20 further includes a guide 29 connected between the base 23 and the upper cover 25. In this embodiment, the upper cover 25, the guide member 29 and the base 23 are sequentially arranged from top to bottom, and are fixed together by fasteners, that is, the fasteners penetrate from below the base and sequentially pass through the base 23, the guide member 29 and the upper cover 25 to be locked.

Further, the guiding chamber 13b further includes a reversing channel 13b3 formed between the guiding member 29 and the upper cover 25 and communicating the first reversing air channel 13b1 with the second reversing air channel 13b2, and the air outlet 13c communicating the second reversing air channel 13b2 with the compressor chamber 13a is disposed on the inner housing 30 and/or the base 23, and the horizontal height of the reversing channel 13b3 is greater than the horizontal height of the air outlet 13 c.

In this embodiment, as shown in fig. 3, the gas in the compressor chamber 13a enters the second reversing air duct 13b2 through the gas outlet 13c, the gas in the second reversing air duct 13b2 enters the first reversing air duct 13b1 through the reversing channel 13b3, and finally flows to the air outlet 21 through the first reversing air duct 13b1 and is discharged out of the housing 20. Because the reversing channel 13b3 is located above the air outlet 13c, the air flowing direction in the second reversing air channel 13b2 is from bottom to top, that is, after the air in the second reversing air channel 13b2 flows into the first reversing air channel 13b1 through the reversing channel 13b3, the air flowing direction is changed, so that the noise of the heat dissipation air channel can be reduced by the guiding cavity 13 b.

Further, the guide 29 has a fixing portion 29a connecting the base 23 and the upper cover 25, and a guide portion 29b connecting the fixing portion 29a and matching the clearance channel 27. In this embodiment, as shown in fig. 2, the fixing portion 29a has holes through which fasteners pass so that the guide 29 can be fixed between the upper cover 25 and the base 23. The guide 29b is provided in an annular configuration matching the clearance channel 27, i.e. around the lateral end face of the housing 20.

Specifically, the guide portion 29b has a fixed end 29b1 that mates with the base 23 and a free end 29b2 that faces away from the fixed end 29b1 and extends toward the inside of the upper cover 25. In this embodiment, as shown in fig. 4, the fixed end 29b1 of the guiding portion 29b is positioned and clamped with the edge of the opening at the upper end of the base 23, so as to prevent the air in the second reversing air duct 13b2 from flowing out from the connection between the fixed end 29b1 and the edge of the opening at the lower end of the upper cover 25, and thus the air outlet 21 is formed between the fixed end 29b1 and the edge of the opening at the lower end of the upper cover 25.

Specifically, the distance between the guide portion 29b and the lateral end surface of the housing 20 where the air outlet 21 is located gradually increases from the fixed end 29b1 toward the free end 29b 2. In this embodiment, as shown in fig. 4, the cross-sectional shape of the guiding portion 29b is an arc structure, so that the noise generated when the air flows in the first reversing air duct 13b1 is smaller.

As shown in fig. 5, specifically, the upper cover 25 has a cover main body 25b forming a cover cavity 25a, and the first reversing air duct 13b1 is formed between the guide portion 29b and an inner wall of the cover main body 25 b. In this embodiment, as shown in fig. 4, the free end 29b2 of the guiding portion 29b extends into the cover cavity 25a, so as to be located inside the cover main body 25b, when the user directly views the housing 20 from the oxygen concentrator along the lateral direction, the cover main body 25b and the guiding portion 29b are overlapped, and the cover main body 25b can shield the reversing channel 13b3, so that the user cannot see the reversing channel 13b3, or cannot see the inside of the installation space 10 through the reversing channel 13b3, thereby forming hidden air outlet, further improving the integrity of the appearance of the housing 20, and not affecting the exhaust of the air outlet 21.

Referring to fig. 6, specifically, the base 23 has a base main body 23b forming a base cavity 23a, a base mounting plate 23c connecting the base main body 23b with the inner casing 30, and a base opening 23d provided on the base mounting plate 23c and communicating the second reversing air duct 13b2 with the compressor chamber 13a, and the inner casing 30 has an inner casing main body 30a forming the compressor chamber 13a, an inner casing opening 30b provided on the inner casing main body 30a and matching the base opening 23d, and an air inlet 30c provided on the inner casing main body 30a and communicating the air inlet chamber 11 with the compressor chamber 13 a.

In this embodiment, the seat mounting plate 23c cooperates with the inner housing main body 30a to form the compressor chamber 13a together with the seat main body 23 b. As shown in fig. 8, the seat opening 23d penetrates the seat mounting plate 23c to the upper end surface of the bottom of the seat main body 23b, that is, the lower groove surface of the seat opening 23d and the upper end surface of the bottom of the seat main body 23b are flush with each other, so that when external dust enters the second reversing air duct 13b2 from the first reversing air duct 13b1, the external dust will be settled at the seat opening 23d, and at this time, the settled gas can be easily discharged to the outside of the casing 20 by using the gas discharged from the compressor chamber 13a. The air inlet 30c is used for installing a fan and is in butt joint with an air outlet of the fan, so that air in the installation space 10 is discharged in an accelerated manner.

Further, the air inlet 30c has a greater level than the air outlet 13 c. In this embodiment, the air inlet 20c is located above the air outlet 13c, so that the air in the compressor chamber 13a flows from top to bottom, and is opposite to the flow direction of the air in the second reversing air duct 13b2, that is, after the air in the compressor chamber 13a flows into the second reversing air duct 13b2 through the air outlet 13c, the flow direction of the air is changed, so that the noise of the heat dissipation air path is reduced.

Further, the seat opening 23d and the inner housing opening 30b are butted against each other and together form the air outlet 13c. In the present embodiment, the seat opening 23d and the inner housing opening 30b together constitute the air outlet 13c, and thus the air output of the compressor chamber 13a can be increased.

Further, the upper cover 25 further has a cover partition 25c connected to the cover main body 25b and covering the guide portion 29b, the cover partition 25c is disposed in the cover cavity 25a and spaced apart from the guide portion 29b, and the reversing channel 13b3 is formed between the cover partition 25c and the free end 29b2 of the guide portion 29 b. In this embodiment, the guide portion 29b adopts a thin sheet structure, and is disposed at an interval with the cover partition plate 25c after extending into the cover cavity 25a, so as to form the reversing channel 13b3, so that an independent air channel is not required to be disposed to communicate the first reversing air channel 13b1 with the second reversing air channel 13b2, and the occupied space of the guide cavity 13b is saved.

Further, the cover main body 25b includes a front case 25b1 and a rear case 25b2 disposed opposite to each other. In this embodiment, the cover main body 25b adopts a split structure, and is formed by splicing a front shell 25b1 and a rear shell 25b2 which are symmetrical to each other, so that the installation of the working element in the upper cover 25 is facilitated.

With continued reference to fig. 5, specifically, the cover spacer 25c has a closing portion 25c1 located in the rear case 25b2 and engaged with the inner case 30, the rear case 25b2 has a first rear case spacer 25b21 and a second rear case spacer 25b22 connected to the ends of the closing portion 25c1, and an upper cavity 13b4 is formed between the closing portion 25c1, the first rear case spacer 25b21, the second rear case spacer 25b22 and the inner case 30. In this embodiment, the sealing portion 25c1 and the first and second rear case partitions 25b21 and 25b22 at both ends are connected to the inner wall surface of the rear case 25b2, and the sealing portion 25c1 is engaged with the inner case 30 in a positioning manner, thereby ensuring the sealing performance of the upper cavity 13b4.

With continued reference to fig. 6, the base 23 further includes a first seat partition 23e connected to the seat main body 23b and abutting against the first rear case partition 25b21, and a second seat partition 23f connected to the seat main body 23b and corresponding to the second rear case partition 25b22, and a lower cavity 13b5 is formed between the seat main body 23b, the first seat partition 23e, the second seat partition 23f, and the inner case 30. In this embodiment, the first seat partition 23e and the second seat partition 23f are both positioned and clamped with the inner housing 30, so that the sealing performance of the lower cavity 13b5 is ensured.

Further, the upper cavity 13b4 and the lower cavity 13b5 are butted with each other and together form a guide cavity 13b. In this embodiment, the upper cavity 13b4 and the lower cavity 13b5 are mutually butted to form the guide cavity 13b together, so as to ensure the tightness of the guide cavity 13b, avoid leakage between the guide cavity 13b and the air inlet cavity 11, effectively separate cold air and hot air in the housing 20, and ensure the normal operation of the working element.

With continued reference to fig. 5, specifically, the cover main body 25b includes a shielding portion 25d located below the cover partition 25c and mated with the guide portion 29 b. In this embodiment, the shielding portion 25d surrounds the lateral end surface of the housing 20 for shielding the guiding portion 29b, and the shielding portion 25d extends downward along the cover partition 25c and covers the outer side of the guiding portion 29b, thereby improving the integrity of the appearance of the housing 20. The shielding portion 25d has an eave-like structure, and can prevent the liquid from directly dripping into the air outlet 21 from the top down.

Further, the shielding portion 25d has a shielding section 25d1 connected between the first and second rear case partitions 25b21 and 25b22 and corresponding to the closing portion 25c1, and the shielding section 25d1 is spaced from the guide portion 29 b. In this embodiment, the shielding section 25d1 is disposed on at least one lateral end surface of the rear case 25b2, and the air outlet 21 is formed between an end of the shielding section 25d1 and the fixed end 29b1 of the guide portion 29 b.

Specifically, the first reversing air duct 13b1 is formed between the shielding section 25d1 and the guide portion 29b, and is located between the first rear case partition 25b21 and the second rear case partition 25b 22. In this embodiment, as shown in fig. 4, the inner wall surface of the shielding section 25d1 may also be configured as an inclined plane parallel to the flow direction of the first reversing air duct 13b1, so as to reduce noise generated by the air flowing in the first reversing air duct 13b 1. The arrangement of the first rear case partition plate 25b21 and the second rear case partition plate 25b22 configures the air outlet 21 as a part of the clearance channel 27, that is, the air outlet 21 discharges air from a part of the end face of the rear case 25b2, thereby avoiding affecting the environment around the whole oxygen concentrator when the whole clearance channel 27 discharges exhaust gas or the whole rear case 25b2 discharges exhaust gas.

Further, as shown with reference to fig. 2, the housing 20 has an air inlet 22 communicating with the air inlet chamber 11. In this embodiment, the air inlet 22 is disposed on the end face of the housing 20 in a straight penetrating manner, that is, the axis of the air inlet 22 is perpendicular to the end face of the housing 20 where the air inlet 22 is located, so as to save manufacturing cost.

Further, the oxygen concentrator further comprises an air intake structure 40 coupled to the housing 20 and cooperating with the air intake 22. In this embodiment, as shown in fig. 1, the air inlet structure 40 is disposed on an end surface of the housing 20 and is communicated with the air inlet cavity 11, so as to guide air outside the housing 20 into the air inlet cavity 11.

As shown in fig. 3 and fig. 7, in particular, the air intake structure 40 includes a drainage cover 41 at least partially covering the air intake 22, and a first air intake channel 43 communicating with the air intake 22. In this embodiment, the drainage cover 41 covers the air inlet 22, so as to prevent the air inlet 22 from being directly exposed to the air and being polluted by dust or particles, and the drainage cover 41 is detachably connected to the housing 20. The first air inlet channel 43 is formed in the air inlet structure 40, and after the air inlet structure 40 is in butt joint with the housing 20, the first air inlet channel 43 is communicated with the air inlet 22.

Further, the drainage cover 41 is spaced from the end surface of the housing 20 where the air inlet 22 is located, and a second air inlet channel 45 communicating with the first air inlet channel 43 is formed between the drainage cover and the housing 20. In this embodiment, a second air inlet channel 45 is formed between the drainage cover 41 and the end surface of the housing 20, and is used for communicating the first air inlet channel 43 with external air, i.e. air outside the housing 20 enters the second air inlet channel 45, then enters the first air inlet channel 43 from the second air inlet channel 45, and then enters the air inlet cavity 11 through the air inlet 22.

Further, the extending direction of the first air inlet channel 43 and the extending direction of the second air inlet channel 45 are disposed at a certain angle.

In this embodiment, as shown in fig. 7, the air outside the housing 20 enters the second air inlet channel 45, changes direction, then flows into the first air inlet channel 43, and finally enters the air inlet chamber 11 from the air inlet 22. Because the second air inlet channel 45 and the first air inlet channel 43 have a certain angle in the air flowing direction, the noise of the air flowing into the air inlet 22 and flowing into the air inlet cavity 11 can be reduced, and therefore the air inlet structure 40 can effectively reduce the air inlet noise of the oxygen concentrator.

When the oxygen concentrator is in a closed state, external dust or particles flow into the second air inlet channel 45 due to factors such as air flow, and when the air flows into the first air inlet channel 43 from the second air inlet channel 45, the dust or particles enter the first air inlet channel 43 and lose power to settle down due to a certain angle between the second air inlet channel 45 and the first air inlet channel 43, so that the dust or particles are prevented from further entering the air inlet 22 and the air inlet cavity 11, and the dust or particles are prevented from polluting or damaging working elements of the oxygen concentrator. Similarly, when flying from the second air inlet channel 45 to the first air inlet channel 43, the small insects stay without turning due to the relation of the included angle between the second air inlet channel 45 and the first air inlet channel 43, so as to prevent the small insects from entering the air inlet cavity 11. In addition, the drainage cover 41 is only required to be detached for cleaning in the later period, so that the normal operation of the air inlet structure 40 can be ensured, an extra air filter is not required to be additionally arranged, and the use cost is saved.

In addition, since the oxygen concentrator can block dust or particles from entering the housing 20, the use of the oxygen concentrator is increased, and the use cost is not increased, for example, the oxygen concentrator is placed in a sofa, a seat in a car, a bed, or the like, which has dust or particles.

Moreover, when the oxygen concentrator is in the open state, by setting the air inlet structure 40, external air flows into the housing 20 through the second air inlet channel 45, the first air inlet channel 43 and the air inlet 22 in sequence, and because a certain included angle exists between the extending direction of the first air inlet channel 43 and the extending direction of the second air inlet channel 45, part of dust particles can also settle between the first air inlet channel 43 and the second air inlet channel 45, so that the normal work of internal working elements is prevented from being influenced by entering the housing 20, and the service life is prolonged.

Further, the extending direction of the second air inlet channel 45 is parallel to the end face of the housing 20 where the air inlet 22 is located. In this embodiment, the air in the second air inlet channel 45 flows along the end face of the housing where the air inlet 22 is located, and compared with the prior art where the air directly flows into the air inlet 22, the oxygen concentrator in this embodiment can be closer to surrounding objects in the placement process while the same air inlet amount is satisfied, so that the oxygen concentrator is suitable for more use scenes. For example closer to the wall.

As shown in fig. 8, the flow guiding cover 41 has a mounting portion 41a that mates with the air inlet 22 and a flow guiding portion 41b that is connected to an end portion of the mounting portion 41a, and the flow guiding portion 41b is circumferentially provided on an edge of the mounting portion 41a and covers an outer side of the air inlet 22.

In this embodiment, as shown in fig. 2, the air inlet 22 has a rectangular structure, the mounting portion 41a has the same rectangular structure as the air inlet, and the drainage portion 41b is connected to the periphery of the mounting portion 41a and completely covers the air inlet 22. The whole drainage cover 41 shields the air inlet 22, so that a user cannot see the open air inlet 22 when looking at the oxygen concentrator directly, the hidden inlet is realized, the integrity of the appearance of the shell 20 is improved, and the use experience of the user is improved.

Of course, in some embodiments, the air intake 22 may be configured as a circle, a regular polygon, or a polygon. The mounting portion 41a may have a different structure from the air inlet 22, such as a circular shape, a regular polygon shape, or a polygonal shape.

Further, the second air inlet channel 45 is formed between the drainage portion 41b and the end surface of the air inlet 22. In this embodiment, the whole second air inlet channel 45 surrounds the drainage cover 41 for a week, that is, surrounds the air inlet 22 for a week, so as to increase the air inlet range of the oxygen concentrator, ensure the air inlet requirement of the oxygen concentrator, and make the oxygen concentrator suitable for a scene with a narrow space.

As shown in fig. 7, specifically, the drainage portion 41b includes a first end 41b1 connected to the mounting portion 41a and a second end 41b2 extending away from the first end 41b1, and a distance between the drainage portion 41b and an end surface of the air intake 22 gradually decreases from the first end 41b1 toward the second end 41b 2.

In this embodiment, the end face of the housing 20 where the air inlet 22 is located is in a planar structure, and a second air inlet channel 45 is formed between the end face and the drainage portion 41b, as shown in fig. 7, the cross-sectional shape of the second air inlet channel 45 is tapered, so that the pressure value of the second air inlet channel 45 at the first end 41b1 is different from the pressure value of the second air inlet channel 45 at the second end 41b2, and pressure difference exists at two ends, so that the flow speed of the air in the second air inlet channel 45 is accelerated, the flow speed of the air flowing into the air inlet 22 is accelerated, and the air inlet speed of the oxygen concentrator is improved.

As shown in fig. 8, specifically, the air intake structure 40 includes a first drainage member 47 connected to the housing 20 and extending toward the drainage cover 41, and a second drainage member 49 connected to the drainage cover 41 and matched with the first drainage member 47, where the first drainage member 47 and the second drainage member 49 are disposed at a distance, and the first air intake channel 43 is formed between the first drainage member 47 and the second drainage member 49.

In this embodiment, the cross-sectional shapes of the first drainage member 47 and the second drainage member 49 are preferably rectangular structures identical to the cross-sectional shape of the air inlet 22, so that the manufacturing and the installation are facilitated. Moreover, since the first air inlet channel 43 is formed between the first flow guiding element 47 and the second flow guiding element 49, the first air inlet channel 43 surrounds the air inlet 22 for a circle, and when the cross-sectional shapes of the first flow guiding element 47 and the second flow guiding element 49 are the same, the air flow velocity of each place in the first air inlet channel 43 of the whole annular structure is equal, so that the air inlet stability of the oxygen concentrator is ensured.

Further, the extending direction of the first air inlet channel 43 is perpendicular to the end surface of the housing where the air inlet 22 is located. In this embodiment, since the second air inlet channel 45 is parallel to the end surface of the housing where the air inlet 22 is located, the extending direction of the first air inlet channel 43 and the extending direction of the second air inlet channel 45 are perpendicular to each other, so that the resistance applied during air inlet is smaller while the dust settling can be satisfied. The air flow in the first air inlet channel 43 flows to the air inlet 22 along the axial direction parallel to the air inlet 22 and flows into the air inlet cavity 11, so that the resistance of the air in the first air inlet channel 43 flowing into the air inlet 22 is reduced.

Further, the first drainage piece 47 and the drainage cover 41 are arranged at intervals, an air inlet gap 42 for communicating the first air inlet channel 43 and the second air inlet channel 45 is formed between the first drainage piece 47 and the drainage cover 41, one end of the second drainage piece 49 is connected with the drainage cover 41, and the other end extends towards the inside of the first drainage piece 47.

In this embodiment, the first drainage member 47 and the second drainage member 49 are both in tubular structures, the first drainage member 47 and the housing 20 are integrally formed, and the second drainage member 49 and the drainage cover 41 are integrally formed. The first air inlet channel 43 is formed between the first drainage piece 47 and the second drainage piece 49, so that the occupied space of the air inlet structure 40 can be saved. Moreover, after the first drainage member 47 and the second drainage member 49 are mutually matched, the liquid can also be prevented from flowing into the air inlet 22 and flowing into the air inlet cavity 11.

As shown in fig. 7, the aperture size of the first flow guiding member 47 is larger than that of the second flow guiding member 49, and the second flow guiding member 49 is at least partially disposed in the first flow guiding member 47, so that the air flowing into the second air inlet channel 45 passes through the air inlet gap 42 and then enters the first air inlet channel 43.

Of course, in some embodiments, the aperture size of the first drainage member 47 may be smaller than the aperture size of the second drainage member 49, so long as the first air inlet channel 43 and the second air inlet channel 45 can form a certain angle.

Further, the first flow guiding member 47 has a connecting end 47a connected to the hole edge of the air inlet 22 and an extending end 47b facing away from the connecting end 47a and extending toward the flow guiding portion 41b, the air inlet gap 42 is formed between the extending end 47b and the flow guiding portion 41b, and a distance between the extending end 47b and an end face of the air inlet 22 is greater than a distance between the second end 41b2 and an end face of the air inlet 22.

In this embodiment, the gas flowing direction in the second air inlet channel 45 changes when the gas flows into the air inlet gap 42, and the gas flowing direction changes again when the gas flows into the first air inlet channel 43 from the air inlet gap 42, so that when the gas outside the housing 20 enters the air inlet 22, the gas flowing direction changes twice, and external dust or particulate matters are further difficult to enter the air inlet 22, and the noise reduction effect is also better.

Referring to fig. 8 in a matching manner, specifically, the air intake structure 40 further includes a first mounting member 44 connected to the first drainage member 47, and a second mounting member 46 connected to the first mounting member 44 and the drainage cover 41, where the first mounting member 44 is located inside the first drainage member 47, and the second mounting member 46 is located inside the second drainage member 49.

In this embodiment, the first mounting member 44 and the second mounting member 46 are fixed together by using a fastener, and the drainage cover 41 is disposed at a distance from the housing 20 after the first mounting member 44 and the second mounting member 46 are connected to each other. The first mounting piece 44 and the second mounting piece 46 are arranged on the inner side of the first drainage piece 47, so that no shielding is ensured in the second air inlet channel 45, and the air inlet of the oxygen concentrator is not influenced.

Further, the drainage cover 41 further has a first mounting groove 41c and a second mounting groove 41d provided on the mounting portion 41a and recessed toward the inside of the mounting space 10. In this embodiment, the first mounting groove 41c is used for connecting with an external atomization port, the second mounting groove 41d is used for integrating the filter and the atomization port on the drainage cover 41, the outer end surface of the housing 20 is fully utilized, and the use of each module of the oxygen concentrator is also facilitated.

Specifically, the first installation groove 41c is provided with an air inlet pipe 41c1 and an air outlet pipe 41c2 which are communicated with the installation space 10, and the second installation groove 41d is provided with an atomization pipe 41d1 which is communicated with the installation space 10. In this embodiment, the air inlet pipe 41c1 is communicated with the air inlet cavity 11, the air outlet pipe 41c2 is communicated with the air inlet of the compressor, the air in the air inlet cavity 11 enters the first installation groove 41c through the air inlet pipe 41c1, flows to the compressor through the air outlet pipe 41c2 after being filtered by the filter, and the filter in the first installation groove 41c can be replaced later. The atomizing tube 41d1 is connected to the atomizing function module in the installation space 10.

Specifically, as shown in fig. 1, the air inlet 22 is disposed on the rear shell 25b2 and located above the air outlet 21, and the direction of the first reversing air duct 13b1 extends away from the air outlet 21, so as to avoid the interaction between the air outlet 21 and the air inlet structure 40 during operation. Moreover, since the air outlet 21 and the air inlet structure 40 are both located at the rear side of the housing 20 and far away from the operation interface at the front side, the use experience of the user is improved. In addition, the casing of the oxygen concentrator adopts a hidden air inlet and air outlet mode, so that the appearance of the casing 20 is more integral.

Of course, in some embodiments, the air inlet 22 may also be disposed on other end surfaces of the housing 20, such as an upper end surface and a lower end surface. The air inlet 22 and the air outlet 21 may be provided on different end surfaces of the housing 20.

It should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is for clarity only, and that the skilled artisan should recognize that the embodiments may be combined as appropriate to form other embodiments that will be understood by those skilled in the art.

The above list of detailed descriptions is only specific to practical embodiments of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent embodiments or modifications that do not depart from the spirit of the present invention should be included in the scope of the present invention.

Claims

1. The oxygen concentrator comprises an outer shell forming an installation space and an inner shell arranged in the installation space, wherein the inner shell is matched with the outer shell to divide the installation space into an air inlet cavity and an air outlet cavity, and the outer shell is provided with an air inlet communicated with the air inlet cavity;

The air inlet structure comprises a first drainage piece connected with the shell and extending towards the drainage cover, and a second drainage piece connected with the drainage cover and matched with the first drainage piece, the first drainage piece and the second drainage piece are arranged at intervals, and the first air inlet channel is formed between the first drainage piece and the second drainage piece, so that the first air inlet channel surrounds the air inlet for a circle;

the aperture size of the first drainage piece is larger than that of the second drainage piece, and the second drainage piece is at least partially arranged in the first drainage piece.

2. The oxygen concentrator of claim 1 wherein the second air intake passage extends in a direction parallel to the end face of the housing where the air intake is located.

3. The oxygen concentrator of claim 1 wherein the flow directing shroud has a mounting portion that mates with the air inlet and a flow directing portion that connects to an end of the mounting portion, the flow directing portion being circumferentially disposed on an edge of the mounting portion and covering an outside of the air inlet, the second air inlet channel being formed between the flow directing portion and an end face of the air inlet.

4. The oxygen concentrator of claim 3 wherein the flow directing portion includes a first end connected to the mounting portion and a second end extending away from the first end, the flow directing portion being spaced from the end face of the air inlet by a distance that decreases from the first end toward the second end.

5. The oxygen concentrator of claim 4, wherein the first air inlet channel extends in a direction perpendicular to an end face of the housing where the air inlet is located.

6. The oxygen concentrator of claim 5, wherein the first flow guiding element is spaced from the flow guiding cover, an air inlet gap is formed between the first flow guiding element and the flow guiding cover, the air inlet gap is communicated with the first air inlet channel and the second air inlet channel, one end of the second flow guiding element is connected with the flow guiding cover, and the other end extends towards the inside of the first flow guiding element.

7. The oxygen concentrator of claim 6 wherein the first flow-directing member has a connecting end connected to an edge of the air inlet aperture and an extending end extending away from the connecting end and toward the flow-directing portion, the air inlet gap being formed between the extending end and the flow-directing portion, the distance between the extending end and the end face of the air inlet being greater than the distance between the second end and the end face of the air inlet.

8. The oxygen concentrator of claim 5, wherein the air intake structure further comprises a first mounting member coupled to the first flow directing member, a second mounting member coupled to the first mounting member and the flow directing shield, the first mounting member being positioned inside the first flow directing member, and the second mounting member being positioned inside the second flow directing member.

9. The oxygen concentrator of claim 3, wherein the flow-directing shield further has a first mounting groove and a second mounting groove disposed on the mounting portion and recessed toward the interior of the mounting space, the first mounting groove having an air inlet tube and an air outlet tube disposed thereon in communication with the mounting space, and the second mounting groove having an atomizing tube disposed thereon in communication with the mounting space.

10. The oxygen concentrator of claim 1, wherein the outer shell further has an air outlet communicated with an air outlet cavity, the air outlet cavity comprises a compressor cavity formed in the inner shell and a guide cavity communicated with the compressor cavity and the air outlet, the guide cavity comprises a first reversing air channel in butt joint with the air outlet and a second reversing air channel communicated with the first reversing air channel and the compressor cavity, the extending direction of the first reversing air channel is obliquely arranged relative to the end face of the outer shell where the air outlet is located, and the extending direction of the first reversing air channel and the extending direction of the second reversing air channel are arranged at a certain angle.