Modular oxygen concentrator having quick-disassembly molecular sieve

Abstract

A modular oxygen concentrator having a quick-disassembly molecular sieve, comprising an oxygen concentrator body (1) and a molecular sieve module (2), wherein a quick-disassembly mating interface (10) is formed on one side of the oxygen concentrator body (1); an air intake adapter (121), an oxygen adapter (122) and a guide wedging surface (1110) are integrally arranged near the top of the quick-disassembly mating interface (10); a molecular sieve air intake connector (251), a molecular sieve oxygen connector (252) and a guide mating surface (260) are provided near the top of the molecular sieve module (2); the molecular sieve air intake connector (251) is correspondingly inserted into the air intake adapter (121), and the molecular sieve oxygen connector (252) is correspondingly inserted into the oxygen adapter (122); and by means of the guide mating surface (260) and the guide wedging surface (1110), the molecular sieve module (2) is assembled onto the quick-disassembly mating interface (10) of the oxygen concentrator body in the insertion direction.

Description

Molecular sieve quick-release assembly oxygen generator

[0001] This disclosure claims priority to Chinese Patent Application No. 202510074041.3, filed on January 17, 2025, entitled “Molecular Sieve Quick-Disassembly Oxygen Generator”, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This disclosure pertains to the field of oxygen generators, and particularly relates to a molecular sieve quick-release assembly oxygen generator. Background Technology

[0003] As oxygen concentrators have become widely available in consumer markets, both in homes and outdoors, molecular sieves, as consumables, will experience a decrease in oxygen production efficiency over time, affecting user experience. Therefore, regular replacement of molecular sieves is necessary. In existing traditional oxygen concentrators, the molecular sieve cylinder is integrated with other components, resulting in a complex structure that is difficult for users to replace themselves. Typically, the machine needs to be returned to the factory for professional handling. However, returning the machine to the factory increases both the user's operating costs and the workload for after-sales personnel.

[0004] To reduce the workload of after-sales staff, Chinese patent CN 221788737 U discloses an oxygen concentrator layout structure, including a rear shell, a front shell, an upper shell, a base, a compressor, a compressor cover, an intake silencer, an exhaust silencer, a molecular sieve cylinder, a fixed bracket, and an oxygen tank. The rear shell, front shell, upper shell, and base are combined to form the outer shell of the oxygen concentrator. The rear shell and compressor cover are fixedly mounted on the base. The top of the compressor cover is equipped with a fixed bracket, a cooling fan, and a molecular sieve cylinder. A cooling fan is mounted below the fixed bracket. An oxygen tank, an exhaust silencer, and a two-position four-way valve are mounted above the fixed bracket. The molecular sieve cylinder is fixed to the side plate of the fixed bracket by a quick-release structure. The compressor and exhaust silencer are mounted inside the compressor cover, and an intake silencer is mounted on the side of the compressor cover. An air inlet is provided on the rear shell, and an intake air path guide is covered on the inner side of the rear shell corresponding to the air inlet. A humidification bottle is mounted on the upper shell. This solution reduces the difficulty for workers to disassemble and assemble the molecular sieve cylinder by replacing it as a whole. However, because the molecular sieve cylinder is closely connected to other components, it is difficult for users to disassemble it themselves, and returning it to the factory for repair will increase the user's operating costs. Therefore, providing an oxygen generator with a reasonable design that allows users to quickly disassemble and assemble the molecular sieve cylinder is an urgent problem to be solved in this disclosure.

[0005] It should be noted that the information disclosed in the background section of this invention is intended only to enhance the understanding of the general background of this disclosure, and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0006] The purpose of this disclosure is to provide an oxygen generator that can be modularly assembled with molecular sieves and has a high degree of interface integration.

[0007] To achieve the above objective, this disclosure provides a molecular sieve quick-release assembly oxygen generator, comprising:

[0008] The oxygen generator body has a quick-release interface on one side. An air intake adapter, an oxygen adapter, and a guide wedge are integrated near the top of the quick-release interface. The air intake adapter, the oxygen adapter, and the guide wedge are disposed outside the interface.

[0009] The molecular sieve module has a molecular sieve air inlet connector, a molecular sieve oxygen connector, and a guide mating surface near its top. The molecular sieve module is assembled into the quick-release interface of the oxygen generator body by fitting and guiding the guide mating surface and the guide wedge surface along the insertion direction. The molecular sieve air inlet connector is correspondingly inserted into the air inlet adapter, and the molecular sieve oxygen connector is correspondingly inserted into the oxygen adapter.

[0010] Preferably, the oxygen generator body includes a main chassis and an air compression assembly, an oxygen storage assembly, a sensing assembly, and a control assembly disposed within the main chassis; the main chassis includes an upper support, a lower support, a side panel, and a front panel; the upper support and the lower support are arranged in layers, the side panel surrounds the upper support and the lower support and forms the quick-release interface on the side of the main chassis, the front panel is located on the side panel, and the air intake adapter, the oxygen adapter, and the guide wedge surface are disposed on the upper support.

[0011] Preferably, the upper support is further provided with a first integrated docking support, on which the two air intake adapters and one oxygen adapter are disposed.

[0012] Preferably, the upper support includes a first support segment with a relatively higher elevation, a second support segment with a relatively lower elevation, and a connecting segment connecting the first support segment and the second support segment; the first support segment extends to the quick-release interface, and an accommodating space is formed below the first support segment; the first integrated docking support and the guide wedge surface are disposed on the first support segment.

[0013] Preferably, the connecting segment includes an integrally formed strip plate and two arc-shaped plates, the strip plate being disposed between the two arc-shaped plates, and the arc-shaped plates having a first fitting concave surface facing the accommodating space.

[0014] Preferably, the second bracket section is provided with a gas distribution valve, the gas distribution valve including a gas distribution valve body and a mounting base, the mounting base being assembled and fixed to the strip plate, the mounting base having a second fitting concave surface that fits against the convex surface of the arc-shaped plate, the air inlet of the gas distribution valve body being connected to the air compression assembly, and the air outlet being connected to the air inlet adapter.

[0015] Preferably, the mounting base has a chamber that communicates with the nitrogen vent of the gas distribution valve body, and the bottom of the mounting base is also provided with a nitrogen vent pipe that communicates with the chamber. The second bracket section is provided with a nitrogen venting hole, and the nitrogen vent pipe is inserted into the nitrogen venting hole.

[0016] Preferably, the second bracket section is also provided with a limiting slot, and the bottom of the gas distribution valve body is provided with a corresponding limiting plate that is inserted into the limiting slot.

[0017] Preferably, the molecular sieve module includes an upper sieve cover, a lower sieve seat, and two molecular sieve cylinders; the molecular sieve cylinders are installed between the upper sieve cover and the lower sieve seat and located in the accommodating space, and the molecular sieve cylinders are fitted to the first fitting concave surface; the molecular sieve air inlet connector, the molecular sieve oxygen connector, and the guide mating surface are provided on the upper sieve cover, and the molecular sieve air inlet connector and the molecular sieve oxygen connector are respectively connected to the air inlet channel and the oxygen outlet channel of the molecular sieve cylinders.

[0018] Preferably, the upper support is further provided with a positioning slot facing the upper screen cover, and the upper screen cover has at least one positioning insertion part for inserting into the positioning slot.

[0019] Preferably, the upper sieve cover is provided with a second integrated docking support, and the two molecular sieve air inlet connectors and one molecular sieve oxygen connector are disposed on the second integrated docking support.

[0020] Preferably, the oxygen outlet channel of the molecular sieve cylinder is located at the bottom, the lower sieve seat is provided with a pressure equalization valve, and the oxygen outlet channel is connected to the molecular sieve oxygen connector through the pressure equalization valve.

[0021] Preferably, the upper sieve cover is also provided with a gas guide extension pipe, one end of which is connected to the molecular sieve oxygen connector, and the other end extends out of the molecular sieve cylinder and is connected to the pressure equalization valve through a hose.

[0022] Preferably, the guiding mating surface is implemented as the side surface of the air guide extension tube.

[0023] Preferably, the molecular sieve module further includes a molecular sieve housing, which includes a first housing, a second housing, and an air inlet grille; the air inlet grille is assembled between the first housing and the second housing; the air inlet grille allows air to enter the air compression assembly at least through the quick-release interface.

[0024] Preferably, an air intake filter is provided on the inner and / or outer side of the air intake grille.

[0025] Preferably, the first integrated docking support is provided with a first assembly hole, the second integrated docking support is provided with a second assembly hole, and the molecular sieve shell is provided with a third assembly hole. The first assembly hole, the second assembly hole, and the third assembly hole are assembled by screw through holes.

[0026] Preferably, the lower support is further provided with a heat dissipation vent facing the quick-release interface, and the heat dissipation vent faces the molecular sieve cylinder.

[0027] Preferably, the panel extends over the quick-release interface, and the molecular sieve module is hidden below the panel.

[0028] Preferably, the control component is a control motherboard, and the sensing component includes an oxygen concentration sensor, a respiration sensor, and a pressure sensor disposed on the control motherboard; the control motherboard is disposed on the upper support and / or the lower support along the stacking direction of the upper support and the lower support.

[0029] Preferably, a first mounting area is formed on the upper bracket, and a second mounting area is formed on the lower bracket. At least the oxygen storage component is located in the first mounting area, and the air compression component is located in the second mounting area. The breathing sensor and the pressure sensor are located in or facing the first mounting area. The oxygen concentration sensor is located on the side of the control motherboard facing away from the first mounting area, and the oxygen inlet pipe and oxygen outlet pipe of the oxygen concentration sensor extend into the first mounting area.

[0030] The technical effects achieved by the above-mentioned technical solutions disclosed herein arise from one or more of the following combinations:

[0031] This disclosure enables rapid disassembly and assembly of the molecular sieve module and the oxygen concentrator body via a quick-release interface, making molecular sieve replacement in the oxygen concentrator more convenient and efficient. It eliminates the need for complex disassembly processes; simply replacing the entire molecular sieve module achieves replacement, thus improving replacement efficiency. Furthermore, by moving the guide wedge surface of the oxygen concentrator body in conjunction with the mating wedge surface of the molecular sieve module, quick alignment of the air inlet adapter with the molecular sieve air inlet connector and the oxygen adapter with the molecular sieve oxygen connector is achieved. This pluggable assembly method shortens the replacement time of the molecular sieve module, improves user convenience, and enhances the overall integration of the oxygen concentrator, making the device more compact and aesthetically pleasing.

[0032] A unique installation structure is designed, in which the upper support is set as a staggered structure with high and low spaces. The molecular sieve cylinder is housed below the relatively high first support section, and the gas distribution valve is set in the relatively low second support section. This achieves a compact structural design, improves space utilization, and facilitates the replacement and docking of the molecular sieve cylinder as a whole module.

[0033] The interfaces of the oxygen generator body and the molecular sieve module, along with the gas distribution valve, are integrated into one area for convenient and efficient connection.

[0034] The specific design of the upper support, combined with the structure of the valve seat and molecular sieve cylinder, ensures a tight fit between the molecular sieve cylinder, the upper support, and the gas distribution valve, further enhancing the stability and ease of installation of the device.

[0035] The gas distribution valve body is installed by mounting the valve seat and connecting section, and the bottom is inserted into the second bracket section for limiting. The installation is carried out by positioning first and then assembling, which is stable and simple.

[0036] The nitrogen venting hole on the second bracket section is for inserting the nitrogen venting pipe for installing the valve seat, so that the exhaust gas of the gas distribution valve body can be discharged through this structure to the lower part of the upper bracket and then discharged outside the oxygen generator. The nitrogen venting hole serves the function of venting nitrogen, and the valve seat can also be installed through the nitrogen venting pipe.

[0037] By designing the molecular sieve shell and molecular sieve cylinder into a modular structure, it is convenient for users to quickly replace them, thereby reducing the downtime and maintenance costs of the oxygen generator and extending its service life; moreover, the molecular sieve shell is hidden under the panel, making the overall structure more beautiful and integrated.

[0038] The modular design allows for quick disassembly and installation of the molecular sieve cylinder. The molecular sieve shell is fully assembled and fixed after assembly via slots, facilitating overall disassembly and assembly.

[0039] Improve the ease of molecular sieve replacement: Design the molecular sieve module with a quick-plug interface for easy replacement or maintenance by users.

[0040] Extend equipment lifespan: The independent modular design ensures that the molecular sieve can be replaced in a timely manner, avoiding the overall equipment failure caused by the failure of the molecular sieve in a purely integrated design.

[0041] Improve maintenance efficiency: Quick docking and disassembly simplify the repair process and reduce user maintenance costs. Attached Figure Description

[0042] Figure 1 shows a schematic diagram of the structure of this disclosure.

[0043] Figure 2 shows the structural assembly diagram of the molecular sieve module of the oxygen generator in this disclosure.

[0044] Figure 3 shows a structural diagram of the main body of the oxygen generator in this disclosure.

[0045] Figure 4 shows a schematic diagram of the main chassis structure in this disclosure.

[0046] Figure 5 shows the docking diagram between the molecular sieve module and the main body of the oxygen generator in this disclosure.

[0047] Figure 6 shows the installation structure of the sensing component in this disclosure.

[0048] Figure 7 shows a schematic diagram of the structure of this disclosure from the opposite direction.

[0049] Figure 8 shows a schematic diagram of the assembly of the upper screen cover and the upper support in this disclosure.

[0050] Figure 9 shows the installation location of the gas distribution valve in this disclosure.

[0051] Figure 10 shows a schematic diagram of the disassembly of the molecular sieve module and the upper support in this disclosure.

[0052] Figure 11 shows a disassembly diagram of the molecular sieve module and the upper support from another perspective in this disclosure.

[0053] Figure 12 shows the installation structure diagram of the valve seat and the upper bracket in this disclosure.

[0054] Figure 13 shows an exploded view of the gas distribution valve and the upper support in this disclosure.

[0055] Figure 14 shows a schematic diagram of the structure of the gas distribution valve body and the mounting seat in this disclosure.

[0056] Figure 15 shows a schematic diagram of the structure of the molecular sieve shell in this disclosure.

[0057] Figure 16 shows an assembly diagram of the air intake grille and the first housing in this disclosure.

[0058] Figure 17 shows an assembly diagram of the second housing and the first housing in this disclosure.

[0059] in: Detailed Implementation

[0060] The following description is provided to enable those skilled in the art to implement and use this disclosure and apply it to specific application contexts. Various variations and uses in different applications will be readily apparent to those skilled in the art, and the general principles defined herein are applicable to a wide range of embodiments. Therefore, this disclosure is not limited to the embodiments given herein, but should be granted the broadest scope consistent with the principles and novel features disclosed herein.

[0061] In the following detailed description, numerous specific details are set forth to provide a more thorough understanding of this disclosure. However, it will be apparent to those skilled in the art that practice of this disclosure is not necessarily limited to these specific details. In other words, well-known structures and devices are shown in block diagram form without being shown in detail to avoid obscuring this disclosure.

[0062] Readers should note all documents and references submitted concurrently with this specification and open to public inspection, the contents of which are incorporated herein by reference. Unless otherwise expressly stated, all features disclosed in this specification (including any appended claims, abstracts, and drawings) may be replaced by alternative features for the same, equivalent, or similar purposes. Therefore, unless explicitly stated otherwise, each disclosed feature is merely one example of a set of equivalent or similar features.

[0063] Note that, where used, the markings left, right, front, back, top, bottom, front, back, clockwise, and counterclockwise are merely for convenience and do not imply any specific fixed direction. In fact, they are used to reflect the relative position and / or orientation between different parts of an object. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0064] In the description of this disclosure, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0065] Note that, in practice, "further," "preferably," "even further," and "more preferably" are simply starting points for describing another embodiment based on the foregoing embodiments. The combination of the content following "further," "preferably," "even further," or "more preferably" with the foregoing embodiments constitutes the complete configuration of another embodiment. Any combination of several "further," "preferably," "even further," or "more preferably" settings following the same embodiment can form yet another embodiment.

[0066] The present disclosure will now be described in detail with reference to the accompanying drawings and specific embodiments. It should be noted that the aspects described below with reference to the accompanying drawings and specific embodiments are merely exemplary and should not be construed as limiting the scope of protection of the present disclosure in any way.

[0067] It should be noted that the oxygen generator is a device that physically separates oxygen using molecular sieves. The principle is as follows: First, the incoming air is filtered and compressed by an air compression assembly. Then, the gas is distributed by a gas distribution valve into the molecular sieve assembly. The molecular sieve assembly consists of two molecular sieve cylinders that work alternately. The gas distribution valve passes the compressed gas into one of the molecular sieve cylinders. Based on the different adsorption capacities of the molecular sieve for nitrogen and oxygen, nitrogen is adsorbed and oxygen is discharged, then the gas enters the oxygen storage tank. After working for a period of time, the gas distribution valve alternates with the other molecular sieve cylinder, and the previous molecular sieve adsorption tower undergoes backflushing to remove nitrogen. This process repeats continuously. This is a necessary prerequisite for understanding the scheme of this embodiment.

[0068] Exemplary Molecular Sieve Quick-Disassembly Oxygen Generator

[0069] Please refer to Figures 1-3. A molecular sieve quick-release assembly oxygen concentrator mainly includes two core parts: the oxygen concentrator body 1 and the molecular sieve module 2. The design aims to integrate the gas connection structure near the top by using a modular molecular sieve design, allowing for easy disassembly and replacement with the oxygen concentrator body 1 using a positioning guide structure. Specifically, as shown in Figure 2, a quick-release interface 10 is formed on one side of the oxygen concentrator body 1. Near the top of the quick-release interface 10, an air inlet adapter 121, an oxygen adapter 122, and a guide wedge surface 1110 are integrated, with the air inlet adapter 121, oxygen adapter 122, and guide wedge surface 1110 positioned outwards. The molecular sieve module 2 is provided with a molecular sieve air inlet connector 251, a molecular sieve oxygen connector 252 and a guide mating surface 260 near the top. The molecular sieve air inlet connector 251 is inserted into the air inlet adapter 121, and the molecular sieve oxygen connector 252 is inserted into the oxygen adapter 122. The molecular sieve module 2 is assembled into the quick-release interface 10 of the oxygen generator body 1 by fitting and guiding along the insertion direction through the guide mating surface 260 and the guide wedge surface 1110.

[0070] In this embodiment, the guide wedge surface 1110 and the guide mating surface 260 can be implemented as a groove and a slider; or as two mating inclined surfaces, etc., in order to guide and position the insertion of the molecular sieve module 2 and the oxygen generator body 1.

[0071] The core change to the oxygen concentrator body 1 is the integration of the air intake adapter 121, oxygen adapter 122, and guide wedge surface 1110 into a single area near the top, achieving a high degree of integration. This can also be achieved by modifying a commercially available oxygen concentrator body 1 based on the description in this embodiment. For further description, this embodiment specifically provides an oxygen concentrator body 1, but this is not intended to be the only limitation.

[0072] Oxygen concentrator main body 1:

[0073] Please refer to Figures 3 and 4. As a preferred embodiment of this invention, the main body 1 of the oxygen generator includes a main casing 11, an air compression assembly 14, an oxygen storage assembly 15, a sensing assembly 16 (see Figure 6), and a control assembly 17. The main casing 11 serves as a structural support and is made of plastic or metal. The air compression assembly 14, the oxygen storage assembly 15, the sensing assembly 16, and the control assembly 17 are all housed within the main casing 11.

[0074] Furthermore, referring to Figures 1, 3, and 4, the main chassis 11 includes an upper support 111, a lower support 112, a side panel 113, and a front panel 114. Specifically, the upper support 111 and the lower support 112 are arranged in layers. The side panel 113 surrounds the upper support 111 and the lower support 112 and forms a quick-release interface 10 on the side of the main chassis 11. The front panel 114 is located on the side panel 113. The air intake adapter 121, the oxygen adapter 122, and the guide wedge surface 1110 are provided on the upper support 111. The side panel 113 surrounds the upper support 111 and the lower support 112 and forms the aforementioned quick-release interface 10 on one side, facilitating the assembly and installation of the molecular sieve module 2 with the upper support 111 or the lower support 112. The front panel 114 extends overhanging above the quick-release interface 10, and the molecular sieve module 2 is hidden below the front panel 114.

[0075] In this embodiment, referring to Figure 6, the control component 17 is a control motherboard, i.e., an integrated circuit board, serving as the control structure for the components in this embodiment. Further, the sensing component 16 includes an oxygen concentration sensor 163, a respiration sensor 161, and a pressure sensor 162 disposed on the control motherboard. The control motherboard is disposed on the side of the upper support 111 and / or the lower support 112 along the stacking direction of the upper support 111 and the lower support 112. Preferably, the control motherboard is disposed on the side of the upper support 111 and the lower support 112 along the stacking direction of the upper support 111 and the lower support 112. This embodiment also includes a battery 18, which is common knowledge regarding the power supply structure of small household appliances and will not be described in detail here. The battery 18 is disposed at the bottom of the lower support 112.

[0076] The upper bracket 111 and the lower bracket 112 serve as structural supports and are arranged in layers. Specifically, referring to Figures 4, 5, and 7, a first mounting area 115 is formed on the upper bracket 111, and a second mounting area 116 is formed on the lower bracket 112. The oxygen storage component 15 is at least partially located in the first mounting area 115, and the air compression component 14 is located in the second mounting area 116. The breathing sensor 161 and the pressure sensor 162 are located in or facing the first mounting area 115. The oxygen concentration sensor 163 is located on the side of the control board facing away from the first mounting area 115, and the oxygen inlet pipe 1631 and the oxygen outlet pipe 1632 of the oxygen concentration sensor 163 extend into the first mounting area 115.

[0077] Please refer to Figure 6. A fan mounting port 1115 is also provided on the upper bracket 111 for mounting a fan to blow air onto the air compression assembly 14 for cooling. A heat dissipation outlet 1130 is also provided on the side panel 113.

[0078] The air compression assembly 14 is an air compressor, whose function is to compress the air entering the oxygen generator body 1 and directly or indirectly deliver it to the molecular sieve module 2 for physical separation of oxygen. The oxygen storage assembly 15 is an oxygen storage tank. After the oxygen is physically separated by the molecular sieve module 2, it is directly or indirectly stored in the oxygen storage tank through the molecular sieve oxygen connector 252 connected to the oxygen adapter 122, and then delivered externally. This indirect storage method includes storage after passing through the oxygen injection valve. Specifically, in order to make the space layout more reasonable and improve the space utilization rate, the air inlet of the oxygen injection valve can be connected to one end of the oxygen adapter 122, and an air outlet can be added at the end of the oxygen injection valve near the oxygen storage tank and connected to the oxygen storage tank. This air outlet is kept in a normally open state with the air inlet of the oxygen injection valve. Part of the oxygen output from the oxygen adapter 122 is delivered to the oxygen storage tank through the oxygen injection valve.

[0079] Please refer to Figures 8 and 10. In this embodiment, the upper support 111 is also provided with a first integrated docking support 12. The two air inlet adapters 121 and one oxygen adapter 122 mentioned above are disposed on the first integrated docking support 12 to dock with the molecular sieve module 2. Similarly, the guide wedge surface 1110 is also preferentially disposed on the upper support 111. Furthermore, in order to improve the space utilization rate of the various components installed on the upper support 111 and to cooperate with the installation of the molecular sieve module 2, the upper support 111 includes a first support section 1111 with a relatively higher elevation, a second support section 1112 with a relatively lower elevation, and a connecting section 1113 connecting the first support section 1111 and the second support section 1112; the first support section 1111 extends from the quick-release docking interface 10, and an accommodating space is formed below the first support section 1111. The first integrated docking support 12 and the guide wedge surface 1110 are disposed on the first support section 1111. The first support segment 1111, the second support segment 1112, and the connecting segment 1113 can be implemented as a plate structure, which can be a flat plate, an irregularly shaped plate, or a curved plate. The side of the connecting segment 1113 facing the molecular sieve module 2 is implemented as a first fitting concave surface 11130, the purpose of which is to adapt to the curved surface structure of the molecular sieve module 2.

[0080] To facilitate the docking of the first integrated docking support 12 on the upper support 111 with the molecular sieve module 2, the guide wedge surface 1110 is implemented as the side of the first support segment 1111, and this side is implemented as an inclined surface. Furthermore, a positioning slot 1114 is provided on the upper support 111 for engaging and positioning with the molecular sieve module 2.

[0081] Please refer to Figure 9. A gas distribution valve 13 is provided on the second support section 1112. The inlet 1310 of the gas distribution valve 13 is connected to the air compression assembly 14, and the outlet 1311 is connected to the inlet adapter 121, thus serving the function of gas distribution. In view of the oxygen production principle of the molecular sieve oxygen generator, this embodiment will not further explain the location of the gas distribution valve 13, but it is preferably a two-position four-way solenoid valve.

[0082] In this embodiment, the upper bracket serves as the structural mounting carrier for the gas distribution valve. The upper bracket has a stepped structure, and its staggered arrangement improves the space utilization of the upper bracket. The gas distribution valve includes a gas distribution valve body 131 and a mounting valve seat 132. After the gas distribution valve body 131 and the mounting valve seat 132 are assembled and connected, they are located on the second bracket section 1112. The mounting valve seat 132 is assembled and fixed to the upper bracket 111. Specifically, the mounting valve seat 132 is assembled and fixed to the connecting section 1113 of the upper bracket 111.

[0083] Furthermore, the connecting section 1113 includes an integrally formed strip plate 11131 and an arc-shaped plate 11132. One strip plate 11131 is disposed between the two arc-shaped plates 11132. The arc-shaped plate 11132, facing the accommodating space, has the aforementioned first fitting concave surface 11130, to which the molecular sieve cylinder 24 is fitted. The mounting valve seat 132 is assembled and fixed to the strip plate 11131. Correspondingly, the mounting valve seat 132 has a second fitting concave surface 1322 that fits against the convex surface of the arc-shaped plate 11132.

[0084] During assembly, the gas distribution valve body 131 is first assembled and connected to the mounting valve seat 132. Specifically, the gas distribution valve body 131 has a third mounting hole 1313, and the mounting valve seat 132 has a fourth mounting hole 1324 corresponding to the third mounting hole 1313. A chamber 1320 is formed inside the gas distribution valve body 131, which is connected to the nitrogen vent of the gas distribution valve body 131. Then, the gas distribution valve 13 is assembled and connected by bolts through the third mounting hole 1313 and the fourth mounting hole 1324. Correspondingly, the bottom of the mounting valve seat 132 is also provided with a nitrogen vent pipe 1321 that connects to the chamber 1320. A nitrogen vent insertion hole 11123 is provided on the second support section 1112. The nitrogen vent pipe 1321 is inserted into the nitrogen vent insertion hole 11123 for positioning and vents the exhaust gas to the second mounting area 116 below the second support section 1112. The exhaust gas from the nitrogen vent pipe 1321 is then discharged to the heat dissipation outlet 1130 through a flexible hose.

[0085] Then, a first mounting hole 11133 is provided on the connecting section 1113. Specifically, the first mounting hole 11133 is provided on the strip plate 11131 of the connecting section 1113, and two or more can be set vertically. The mounting valve seat 132 is provided with a second mounting hole 1323 corresponding to the first mounting hole 11133. After the nitrogen venting pipe 1321 is inserted into the nitrogen venting insertion hole 11123 for positioning, the mounting valve seat 132 is assembled and fixed to the connecting section 1113 through the first mounting hole 11133 and the second mounting hole 1323 with bolts, thereby realizing the installation of the gas distribution valve body 131 and the upper bracket 111. Depending on its size, the mounting valve seat 132 has at least one second fitting concave surface 1322 that fits against the convex surface of the arc plate 11132 to form a tight fit, thereby making the best use of the installation space.

[0086] The gas distribution valve body 131 is entirely located on the second support section 1112. Specifically, a mounting area 11121 for the gas distribution valve 13 is formed on the second support section 1112 near the connecting section 1113. This mounting area 11121 can be shaped into a shallow groove area by means of ribs to limit and lock the gas distribution valve body 131. A limiting slot 11122 is also provided on the second support section 1112, specifically located within the mounting area 11121. A corresponding limiting plate 1312 is provided at the bottom of the gas distribution valve body 131, which is inserted into the limiting slot 11122 to limit the position of the gas distribution valve body 131 on the second support section 1112. Preferably, there are three limiting slots 11122 arranged side by side with a spacing between them, and the number of limiting plates 1312 corresponds to the number of these slots.

[0087] Furthermore, the gas distribution valve body 131 has one air inlet 1310 and two air outlets 1311. The air inlet 1310 is connected to the air compressor of the oxygen generator, where compressed air is supplied. The air outlets 1311 are then directly or indirectly connected to the molecular sieve module 2. Since the structural principle of the gas distribution valve 13 is based on existing technology, the structure of the gas distribution valve body 131 will not be further described. It is preferably a two-position four-way solenoid valve.

[0088] Furthermore, both the first support segment 1111 and the second support segment 1112 are preferably plates, which are integrally formed with the connecting segment 1113. For the arc-shaped plate structure of the connecting segment 1113, the first support segment 1111 and the second support segment 1112 form an arc-shaped structure that is adapted to it at the forming connection with the connecting segment 1113.

[0089] Please refer to Figures 3 and 4. The lower bracket 112 is installed below and supported by the upper bracket 111. A heat dissipation vent 1120 is also provided on the lower bracket 112 facing the quick-release interface 10. This heat dissipation vent 1120 faces the molecular sieve module 2 (later implemented to face the molecular sieve cylinder 24). When the winter temperature is low, the heat dissipation vent 1120 is opened, and the compressor's heat dissipation gas is delivered to the molecular sieve cylinder 24 through the heat dissipation vent 1120, which has the effect of warming the internal molecular sieve and enhancing the oxygen production efficiency of the molecular sieve.

[0090] Molecular sieve module 2:

[0091] Please refer to Figures 8 to 17. Near the top, the molecular sieve module 2 is provided with a molecular sieve air inlet connector 251, a molecular sieve oxygen connector 252, and a guide mating surface 260. The molecular sieve air inlet connector 251 is inserted into the air inlet adapter 121, and the molecular sieve oxygen connector 252 is inserted into the oxygen adapter 122. The molecular sieve module 2 is assembled into the quick-release interface 10 of the oxygen generator body 1 by conforming to the guide mating surface 260 and the guide wedge surface 1110 along the insertion direction.

[0092] The molecular sieve module 2 is plugged into the first integrated docking support 12 for gas exchange. It is also detachably installed to the oxygen generator body 1 through an assembly structure.

[0093] In this embodiment, the molecular sieve module 2 includes an upper sieve cover 22, a lower sieve seat 23, and two molecular sieve cylinders 24. The two molecular sieve cylinders 24 are installed between the upper sieve cover 22 and the lower sieve seat 23 and are located in the accommodating space. A molecular sieve air inlet connector 251, a molecular sieve oxygen connector 252, and a guide mating surface 260 are provided on the upper sieve cover 22. The molecular sieve air inlet connector 251 and the molecular sieve oxygen connector 252 are respectively connected to the air inlet channel and the oxygen outlet channel of the molecular sieve cylinder 24.

[0094] Based on the oxygen production principle of the molecular sieve oxygen generator, two molecular sieve cylinders 24 work alternately, and the two are connected to the outside through the exhaust channels in the upper sieve cover 22 and the lower sieve seat 23. Furthermore, based on the structural principle that one end of the molecular sieve cylinder 24 is for air intake and the other end is for oxygen output, the air intake channel is located at the top of the molecular sieve cylinder 24, and the oxygen output channel is located at the bottom of the molecular sieve cylinder 24.

[0095] Referring to Figure 10, a pressure equalization valve 230 is provided on the lower sieve seat 23. The oxygen outlet channel is connected to the outside through the pressure equalization valve 230. In this embodiment, the pressure equalization valve 230 is connected to the molecular sieve oxygen connector 252, thereby integrating the gas inlet and outlet of the molecular sieve on the top upper sieve cover 22, realizing the overall quick disassembly of the molecular sieve module 2 and reducing the connection of complex pipelines. Furthermore, the upper sieve cover 22 is also provided with a gas guide extension pipe 26. One end of the gas guide extension pipe 26 is connected to the molecular sieve oxygen connector 252, and the other end extends and cantileveres outside the molecular sieve cylinder 24 and is connected to the pressure equalization valve 230 through a hose. Further, referring to Figure 11, the guide mating surface 260 is implemented as the side of the gas guide extension pipe 26.

[0096] Please refer to Figures 8 and 10. The upper sieve cover 22 engages with the positioning slot 1114 in the oxygen generator body 1. The upper sieve cover 22 has at least one positioning insertion portion that connects to the positioning slot 1114. Furthermore, this positioning insertion portion is implemented as a side edge of the upper sieve cover 22. When the molecular sieve module 2 is assembled into the oxygen generator body 1, the upper sieve cover 22 is positioned in the positioning slot 1114, and the molecular sieve cylinder 24 is attached to the first contact concave surface 11130 of the upper bracket.

[0097] Furthermore, referring to Figure 10, the upper sieve cover 22 is provided with a second integrated docking support 25 that docks with the first integrated docking support 12. Two molecular sieve air inlet connectors 251 and one molecular sieve oxygen connector 252 are provided on the second integrated docking support 25. Further, the first integrated docking support 12 is provided with a first mounting hole 120, and the second integrated docking support 25 is provided with a second assembly hole 250. When the two molecular sieve air inlet connectors 251 and one molecular sieve oxygen connector 252 are respectively inserted into the two air inlet adapters 121 and one oxygen adapter 122, the positions of the first assembly hole 120 and the second assembly hole 250 correspond, and they can be assembled by screws through the holes. At least the first assembly hole 120 is located at the end of the screw, and it is implemented as a threaded hole, or both are through holes, and the screw is a self-tapping screw.

[0098] Furthermore, referring to Figures 15-17, the molecular sieve module 2 also includes a molecular sieve housing 21, which comprises a first housing 211, a second housing 212, and an air intake grille 213. Specifically, the air intake grille 213 is assembled between the first housing 211 and the second housing 212; the air intake grille 213 allows air to enter the air compression assembly 14 at least through the quick-release interface 10 or the mounting gaps of the upper bracket 111 and the lower bracket 112. An air intake filter is provided on the inner and / or outer sides of the air intake grille 213; in this embodiment, it is preferable that air intake filters are provided on both the inner and outer sides of the air intake grille 213.

[0099] The first housing 211 and the second housing 212 are respectively assembled on both sides of the air intake grille 213. Specifically, air intake grille mounting holes 2130 are provided on both sides of the air intake grille 213. The first housing 211 has a first housing mounting hole 2110 on the side near the air intake grille 213, and the second housing 212 has a second housing mounting hole 2120 on the side near the air intake grille 213. The first housing mounting hole 2110 is screwed into the air intake grille mounting hole 2130 on one side of the air intake grille 213, and the second housing mounting hole 2120 is screwed into the air intake grille mounting hole 2130 on the other side of the air intake grille 213.

[0100] Furthermore, the first housing 211 includes a first base plate 2111 and a first vertical enclosure plate 2112, and the second housing 212 is implemented as a second vertical enclosure plate. The first vertical enclosure plate 2112, the second vertical enclosure plate, and the air intake grille 213 form a U-shaped semi-enclosed structure. Its bottom has the first base plate 2111, and its top is an opening covered and hidden by the panel 114 of the oxygen generator body 1. Its side is connected to the quick-release interface 10 to form a fully enclosed structure, while the upper sieve cover 22, the lower sieve seat 23, and the molecular sieve cylinder 24 are disposed inside.

[0101] Furthermore, referring to Figures 8 and 15, a first ear plate 221 is provided on the upper sieve cover 22. The upper sieve cover 22 is installed with the molecular sieve shell 21 through the first ear plate 221 and the screw through hole. A second ear plate 2121 is provided at the bottom of the second vertical enclosure plate. The second vertical enclosure plate is installed with the molecular sieve shell 21 through the second ear plate 2121 and the screw through hole.

[0102] To facilitate the mating assembly of the air intake grille 213 and the second vertical surround plate on the first housing 211, please refer to Figures 16 and 17. In this embodiment, the first base plate is provided with a first mating groove 21110, and a first snap-fit ​​groove 21111 is formed between the first mating groove 21110 and the first vertical surround plate 2112. The bottom of the air intake grille 213 is provided with a first mating portion 2132, which abuts against the first mating groove 21110 and is partially snapped into the first snap-fit ​​groove 21111. Furthermore, the first base plate 2111 is also provided with a first mating slot 21112, and the bottom of the second vertical surround plate is provided with a second mating portion 2122, which is inserted into the first mating slot 21112. Preferably, the first docking portion 2132 is a rib formed at the bottom of the air intake grille 213, and the second docking portion 2122 is a docking protrusion formed on the second housing 212.

[0103] After air enters through the air intake grille 213, it is connected to the upper support 111 and lower support 112 within the oxygen generator body 1. The air is then filtered by the air intake grille 213 and enters the air compression assembly 14 in the second installation area 116 for compression. After compression, the air passes through a hose (not shown) to the air inlet 1310 of the gas distribution valve 13. The two outlets 1311 of the gas distribution valve 13 are then connected to the two air inlet adapters 121 of the first integrated docking support 12. The two air inlet adapters 121 are connected to the two molecular sieve air inlet connectors 251 of the molecular sieve module 2 to deliver air to the molecular sieve cylinder 24. After oxygen separation in the molecular sieve cylinder 24, the air returns to the first integrated docking support 12 through the equalizing valve 230 of the lower sieve seat 23 and the air guide extension pipe 26. The air then returns to the oxygen generator body 1 through the molecular sieve oxygen connector 252 and the oxygen adapter 122. Finally, the air enters the oxygen storage assembly 15 after passing through the oxygen injection valve 19 and the sensing assembly 16 as described above. The gas distribution valve 13, as a two-position four-way solenoid valve, can also backflush the molecular sieve cylinder 24 alternately through the air inlet adapter 121 and the molecular sieve air inlet adapter 251.

[0104] As described above, referring to Figure 10, the positions of the first mounting hole 120 and the second mounting hole 250 correspond, and they can be assembled using screws through the holes. To improve the overall assembly integrity of the molecular sieve shell 21, a third mounting hole is provided on the molecular sieve shell 21. The first mounting hole 120, the second mounting hole 250, and the third mounting hole are assembled using screws through the holes. Furthermore, an air intake grille ear plate 2131 is provided on the air intake grille 213, and the third mounting hole is implemented as an ear hole on the air intake grille ear plate 2131. The first mounting hole 120, the second mounting hole 250, and the third mounting hole are assembled with screws as a group; in this embodiment, two groups are preferably arranged side by side.

[0105] It should be noted that in this embodiment, the air inlet adapter 121, oxygen adapter 122, and guide wedge surface 1110 of the oxygen generator body, and the molecular sieve air inlet connector 251, molecular sieve oxygen connector 252, and guide mating surface 260 of the molecular sieve module 2 are preferably integrated near the panel 114 to match the height of the molecular sieve cylinder. However, based on the expectations of the molecular sieve physical separation technology, the height of the molecular sieve cylinder is not limited in any way. The above connectors can also correspond to the middle position of the quick-release interface 10 of the oxygen generator 1 as the height of the molecular sieve cylinder decreases, and this is not a limitation of this embodiment.

[0106] The beneficial effects of this embodiment:

[0107] This disclosure modularizes the molecular sieve and designs a quick-release interface, making it more convenient and efficient to replace the molecular sieve in the oxygen concentrator. By integrating the oxygen concentrator body and the oxygen inlet and outlet mechanisms of the molecular sieve module and connecting them in a pluggable assembly manner, the replacement time of the molecular sieve is shortened, the user's replacement convenience is improved, and the overall integration of the oxygen concentrator is enhanced, making the device more compact and aesthetically pleasing.

[0108] A unique installation structure is designed, in which the upper support is set as a staggered structure with high and low spaces. The molecular sieve cylinder is housed below the relatively high first support section, and the gas distribution valve is set in the relatively low second support section. This achieves a compact structural design, improves space utilization, and facilitates the replacement and docking of the molecular sieve cylinder as a whole module.

[0109] The interfaces of the oxygen generator body and the molecular sieve module, along with the gas distribution valve, are integrated into one area for convenient and efficient connection.

[0110] The specific design of the upper support, combined with the structure of the valve seat and molecular sieve cylinder, ensures a tight fit between the molecular sieve cylinder, the upper support, and the gas distribution valve, further enhancing the stability and ease of installation of the device.

[0111] The gas distribution valve body is installed by mounting the valve seat and connecting section, and the bottom is inserted into the second bracket section for limiting. The installation is carried out by positioning first and then assembling, which is stable and simple.

[0112] The nitrogen venting hole on the second bracket section is for inserting the nitrogen venting pipe for installing the valve seat, so that the exhaust gas of the gas distribution valve body can be discharged through this structure to the lower part of the upper bracket and then discharged outside the oxygen generator. The nitrogen venting hole serves the function of venting nitrogen, and the valve seat can also be installed through the nitrogen venting pipe.

[0113] By designing the molecular sieve shell and molecular sieve cylinder into a modular structure, it is convenient for users to quickly replace them, thereby reducing the downtime and maintenance costs of the oxygen generator and extending its service life; moreover, the molecular sieve shell is hidden under the panel, making the overall structure more beautiful and integrated.

[0114] The modular design allows for quick disassembly and installation of the molecular sieve cylinder. The molecular sieve shell is fully assembled and fixed after assembly via slots, facilitating overall disassembly and assembly.

[0115] Improve the ease of molecular sieve replacement: Design the molecular sieve module with a quick-plug interface for easy replacement or maintenance by users.

[0116] Extend equipment lifespan: The independent modular design ensures that the molecular sieve can be replaced in a timely manner, avoiding the overall equipment failure caused by the failure of the molecular sieve in a purely integrated design.

[0117] Improve maintenance efficiency: Quick docking and disassembly simplify the repair process and reduce user maintenance costs.

[0118] Furthermore, the present disclosure has been described in detail above with reference to the accompanying drawings and embodiments. Those skilled in the art can make various modifications to the present disclosure based on the above description. Therefore, certain details in the embodiments should not be construed as limiting the present disclosure, and the scope of protection of the present disclosure shall be defined by the appended claims.

Claims

1. Molecular sieve quick-release assembly oxygen generator, including: The oxygen generator body has a quick-release interface on one side. An air intake adapter, an oxygen adapter, and a guide wedge are integrated near the top of the quick-release interface. The air intake adapter, the oxygen adapter, and the guide wedge are disposed outside the interface. The molecular sieve module has a molecular sieve air inlet connector, a molecular sieve oxygen connector, and a guide mating surface near its top. The molecular sieve module is assembled into the quick-release interface of the oxygen generator body by fitting and guiding the guide mating surface and the guide wedge surface along the insertion direction. The molecular sieve air inlet connector is correspondingly inserted into the air inlet adapter, and the molecular sieve oxygen connector is correspondingly inserted into the oxygen adapter.

2. The molecular sieve quick-release assembly oxygen generator as described in claim 1, wherein, The oxygen generator body includes a main chassis and an air compression assembly, an oxygen storage assembly, a sensing assembly, and a control assembly disposed within the main chassis; the main chassis includes an upper support, a lower support, a side panel, and a front panel; the upper support and the lower support are arranged in layers, the side panel surrounds the upper support and the lower support and forms the quick-release interface on the side of the main chassis, the front panel is located on the side panel, and the air intake adapter, the oxygen adapter, and the guide wedge surface are disposed on the upper support.

3. The molecular sieve quick-release assembly oxygen generator as described in claim 2, wherein, The upper support is also provided with a first integrated docking support, on which the two air intake adapters and one oxygen adapter are located.

4. The molecular sieve quick-release assembly oxygen generator as described in claim 3, wherein, The upper support includes a first support section with a relatively higher elevation, a second support section with a relatively lower elevation, and a connecting section connecting the first support section and the second support section; the first support section extends to the quick-release interface, and an accommodating space is formed below the first support section; the first integrated docking support and the guide wedge surface are provided on the first support section.

5. The molecular sieve quick-release assembly oxygen generator as described in claim 4, wherein, The connecting section includes an integrally formed strip plate and two arc-shaped plates. The strip plate is disposed between the two arc-shaped plates, and the arc-shaped plates have a first fitting concave surface facing the accommodating space.

6. The molecular sieve quick-release assembly oxygen generator as described in claim 5, wherein, The second bracket section is provided with a gas distribution valve, which includes a gas distribution valve body and a mounting base. The mounting base is assembled and fixed to the strip plate. The mounting base has a second fitting concave surface that fits against the convex surface of the arc-shaped plate. The air inlet of the gas distribution valve body is connected to the air compression assembly, and the air outlet is connected to the air inlet adapter.

7. The molecular sieve quick-release assembly oxygen generator as described in claim 6, wherein, The mounting base has a chamber that connects to the nitrogen vent of the gas distribution valve body. The bottom of the mounting base is also provided with a nitrogen venting pipe that connects to the chamber. The second bracket section is provided with a nitrogen venting insertion hole, and the nitrogen venting pipe is inserted into the nitrogen venting insertion hole.

8. The molecular sieve quick-release assembly oxygen generator as described in claim 6 or 7, wherein, The second bracket section is also provided with a limiting slot, and the bottom of the gas distribution valve body is provided with a corresponding limiting plate that is inserted into the limiting slot.

9. The molecular sieve quick-release assembly oxygen generator as described in any one of claims 5-8, wherein, The molecular sieve module includes an upper sieve cover, a lower sieve seat, and two molecular sieve cylinders; the molecular sieve cylinders are installed between the upper sieve cover and the lower sieve seat and are located in the accommodating space, and the molecular sieve cylinders are fitted to the first fitting concave surface; the molecular sieve air inlet connector, the molecular sieve oxygen connector, and the guide mating surface are provided on the upper sieve cover, and the molecular sieve air inlet connector and the molecular sieve oxygen connector are respectively connected to the air inlet channel and the oxygen outlet channel of the molecular sieve cylinders.

10. The molecular sieve quick-release assembly oxygen generator as described in claim 9, wherein, The upper support is also provided with a positioning slot facing the upper screen cover, and the upper screen cover has at least one positioning insertion part that inserts into the positioning slot.

11. The molecular sieve quick-release assembly oxygen generator as described in claim 9 or 10, wherein, The upper sieve cover is provided with a second integrated docking support, and the two molecular sieve air inlet connectors and one molecular sieve oxygen connector are located on the second integrated docking support.

12. The molecular sieve quick-release assembly oxygen generator as described in claim 11, wherein, The oxygen outlet channel of the molecular sieve cylinder is located at the bottom, and the lower sieve seat is equipped with a pressure equalization valve. The oxygen outlet channel is connected to the molecular sieve oxygen connector through the pressure equalization valve.

13. The molecular sieve quick-release assembly oxygen generator as described in claim 12, wherein, The upper sieve cover is also provided with a gas guide extension pipe. One end of the gas guide extension pipe is connected to the molecular sieve oxygen connector, and the other end extends out of the molecular sieve cylinder and is connected to the pressure equalization valve through a hose.

14. The molecular sieve quick-release assembly oxygen generator as described in claim 13, wherein, The guiding mating surface is implemented as the side surface of the air guide extension tube.

15. The molecular sieve quick-release assembly oxygen generator as described in any one of claims 11-14, wherein, The molecular sieve module further includes a molecular sieve shell, which includes a first shell, a second shell, and an air inlet grille; the air inlet grille is assembled between the first shell and the second shell.

16. The molecular sieve quick-release assembly oxygen generator as described in claim 15, wherein, An air intake filter is provided on the inner and / or outer side of the air intake grille.

17. The molecular sieve quick-release assembly oxygen generator as described in claim 15 or 16, wherein, The first integrated docking support is provided with a first assembly hole, the second integrated docking support is provided with a second assembly hole, and the molecular sieve shell is provided with a third assembly hole. The first assembly hole, the second assembly hole and the third assembly hole are assembled by screw through holes.

18. The molecular sieve quick-release assembly oxygen generator as described in any one of claims 15-17, wherein, The lower support is also provided with a heat dissipation vent at the quick-release interface, and the heat dissipation vent faces the molecular sieve cylinder.

19. The molecular sieve quick-release assembly oxygen generator as described in any one of claims 2-18, wherein, The panel extends over the quick-release interface, and the molecular sieve module is hidden below the panel.

20. The molecular sieve quick-release assembly oxygen generator as described in any one of claims 2-19, wherein, The control component is a control motherboard, and the sensing component includes an oxygen concentration sensor, a respiration sensor, and a pressure sensor disposed on the control motherboard; the control motherboard is disposed on the upper support and / or the lower support along the stacking direction of the upper support and the lower support.

21. The molecular sieve quick-release assembly oxygen generator as described in claim 20, wherein, A first mounting area is formed on the upper bracket, and a second mounting area is formed on the lower bracket. The oxygen storage component is at least partially located in the first mounting area, and the air compression component is located in the second mounting area. The breathing sensor and the pressure sensor are located in or facing the first mounting area. The oxygen concentration sensor is located on the side of the control motherboard facing away from the first mounting area, and the oxygen inlet pipe and oxygen outlet pipe of the oxygen concentration sensor extend into the first mounting area.

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