Train oxygen supply detection device

Abstract

The present invention discloses a train oxygen supply detection device, which includes a device housing, a waterproof housing, an oxygen sensor, a circuit board and a connector; the waterproof housing is arranged on the device housing, and the interior of the waterproof housing is a sensor accommodating chamber with one end open, and the sensor accommodating chamber is used to place the oxygen sensor; the circuit board is arranged inside the device housing, and is electrically connected to the connector and the oxygen sensor; the connector is arranged on the outer wall of the device housing, and is electrically connected to the circuit board; the device housing includes an air inlet and an air outlet, and a bypass channel connected to the sensor accommodating chamber is arranged between the air inlet and the air outlet; the waterproof housing is connected to the bypass channel of the device housing. The present invention adopts a bypass channel for drainage, and a waterproof membrane is arranged at the bypass channel to block moisture from flowing into the sensor test chamber; it solves the technical problem that when detecting the oxygen concentration of oxygen, moisture condenses and contacts with the sensor in the oxygen detection device, which may cause sensor failure or damage.

Description

Technical Field

[0001] The invention relates to the technical field of oxygen supply, and in particular to a train oxygen supply detection device. Background Art

[0002] The oxygen content in the air at sea level is 20.95%, at an altitude of 3,500 meters, it is 77.1% of the oxygen content at sea level, and at an altitude of 5,000 meters, it is 61.8% of the oxygen content at sea level. When the altitude generally reaches about 2,700 meters, there will be altitude sickness. Inhaling oxygen to improve the body's hypoxia symptoms has become the most direct and effective method of plateau hypoxia protection. Installing a diffuse oxygen supply system in plateau trains and cars to establish an oxygen-rich environment in the carriage is beneficial to improving travel safety and comfort in plateau areas; installing a diffuse oxygen supply system in offices, hotels and other indoor places to establish an oxygen-rich environment will help improve the quality of life and maintain physical health.

[0003] In the diffuse oxygen supply system, oxygen generators are usually used to separate oxygen, but the oxygen separated by the oxygen generator contains moisture. When detecting the oxygen concentration of oxygen, this moisture condenses and contacts the sensor in the oxygen detection device, causing sensor failure or damage. This has become a long-standing technical problem that has plagued the plateau diffuse oxygen supply industry.

[0004] Therefore, there is an urgent need for an oxygen concentration detection device with waterproof function that can be used in a diffusion oxygen supply system. Summary of the invention

[0005] The technical problem to be solved by the present invention is that an oxygen concentrator is usually used to separate oxygen in the existing diffuse oxygen supply system, but the oxygen separated by the oxygen concentrator contains moisture; when detecting the oxygen concentration of oxygen, the moisture condenses and contacts with the sensor in the oxygen detection device, causing the sensor to malfunction or be damaged. The purpose of the present invention is to provide a train oxygen supply detection device, which solves the technical problem that the moisture condenses and contacts with the sensor in the oxygen detection device, causing the sensor to malfunction or be damaged.

[0006] The present invention is achieved through the following technical solutions:

[0007] A train oxygen supply detection device, comprising a device housing, a waterproof housing, an oxygen sensor, a circuit board and a connector; the waterproof housing is arranged on the device housing, the interior of the waterproof housing is a sensor accommodating chamber with one end open, and the sensor accommodating chamber is used to place the oxygen sensor; the circuit board is arranged inside the device housing and is electrically connected to the connector and the oxygen sensor; the connector is arranged on the outer wall of the device housing and is electrically connected to the circuit board;

[0008] The device housing comprises an air inlet and an air outlet, and a bypass channel communicating with the sensor accommodating cavity is arranged between the air inlet and the air outlet; the waterproof housing is communicated with the bypass channel of the device housing.

[0009] The working principle is: based on the existing diffuse oxygen supply system, an oxygen generator is usually used to separate oxygen, but the oxygen separated by the oxygen generator contains moisture; when detecting the oxygen concentration of oxygen, these moisture condenses and contacts with the sensor in the oxygen detection device, which may cause sensor failure or damage. The present invention designs an oxygen concentration detection device with waterproof function that can be used in diffuse oxygen supply systems. The present invention breaks the design idea that the conventional sensor is set on the channel between the air inlet and the air outlet, that is, the sensor is not placed on the channel between the air inlet and the air outlet, but uses a bypass channel for drainage, and a waterproof membrane is set at the bypass channel to block moisture from flowing into the sensor test cavity; it solves the problem that when detecting the oxygen concentration of oxygen, moisture condenses and contacts with the sensor in the oxygen detection device, which may cause sensor failure or damage.

[0010] The invention has a simple and reasonable structure and is applied to a device for detecting environmental parameters such as oxygen concentration, compartment (indoor) pressure and temperature in plateau trains or other indoor environments; the device is suitable for large-scale promotion and use on plateau trains.

[0011] Furthermore, the device shell is divided into an air-conducting side and an electrical side, and the air-conducting side is provided with an air inlet, an air outlet, and a second channel connecting the air inlet and the air outlet; one end of the bypass channel is connected to the second channel, and the other end is arranged on the air-conducting side close to the waterproof shell, and is connected to the sensor accommodating cavity through the first channel.

[0012] Furthermore, a flow limiting device is provided on one side of the second channel near the air inlet, and the flow limiting device limits the oxygen flow rate. This is because changes in plateau air pressure and oxygen source pressure cause large fluctuations in oxygen flow, so a flow limiting device is provided at the air inlet to prevent large fluctuations in oxygen flow caused by changes in plateau air pressure.

[0013] Furthermore, the current limiting device comprises a current limiting channel running through both ends of the current limiting device, and the current limiting channel is a narrow channel processed from the second channel; as a preferred embodiment, the aperture of the current limiting channel is 0.3-0.7 mm.

[0014] Furthermore, the waterproof housing is a rectangular parallelepiped, a first thread is provided near the opening end of the sensor accommodating cavity, a first platform is provided at the bottom of the first thread, and a first sealing groove and a first sealing ring are provided on the first platform;

[0015] A first passage penetrating the waterproof housing is provided at a position without threads in the sensor accommodating cavity, and a waterproof membrane is provided at the port of the first passage. As a preferred solution, the waterproof membrane is a membrane made of polytetrafluoroethylene.

[0016] Furthermore, the oxygen sensor includes a detection unit, a sensor line and a sealing ring, one end of the sensor line is connected to the detection unit to provide power to the detection unit and output a sensor signal; the sealing ring is provided with a wire hole for the sensor line to pass through, the sensor line passes through the sealing ring through the wire hole and forms a sealed connection with the sealing ring;

[0017] The sealing ring forms a sealing connection with the first sealing ring on the first platform.

[0018] Furthermore, the waterproof housing also includes a pressure ring and a cavity cover, the outer circumference of the pressure ring is provided with a second thread matching the first thread, and the sealing ring is fixed in the sensor accommodating cavity by the pressure ring; the cavity cover is arranged at the open end of the waterproof housing, and a notch for leading out the sensor line is provided between the cavity cover and the waterproof housing (arranged on the side of the waterproof housing close to the circuit board to facilitate the connection of the sensor line to the circuit board).

[0019] Furthermore, a second sealing groove and a second sealing ring are provided between the air guide side of the device housing and the waterproof housing;

[0020] A filter device and a pressure ring for fixing the filter device are also provided at the air inlet;

[0021] As a preferred solution, the filtering device is a stainless steel sintered filter with a filter diameter of 3 to 5 um.

[0022] Furthermore, the electrical side of the device housing is provided with an electrical cavity for accommodating a circuit board, and a protective cover for sealing the electrical cavity; one side of the electrical cavity is provided with a through hole connected to the outer wall, and the wires of the connector are connected to the circuit board through the through hole; the side of the electrical cavity close to the air guide side is provided with a sensor wire introduction hole at a position corresponding to the notch.

[0023] Furthermore, the circuit board includes a power module, a microprocessor, a pressure monitoring module, a temperature monitoring module, and a CO2 monitoring module; the device is applied to plateau trains to detect environmental parameters such as oxygen concentration, pressure and temperature in the carriage.

[0024] Furthermore, mounting holes for fixing the device are provided around the device housing.

[0025] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0026] 1. The sensor of a train oxygen supply detection device of the present invention is not placed on the channel between the air inlet and the air outlet, but a bypass channel is used for drainage, and a waterproof membrane is provided at the bypass channel to block the flow of moisture into the sensor test cavity; the technical problem that when detecting the oxygen concentration of oxygen, the condensed moisture contacts the sensor in the oxygen detection device, causing the sensor to malfunction or be damaged is solved.

[0027] 2. The train oxygen supply detection device of the present invention limits the oxygen flow rate entering the present invention by the aperture of the current limiting device, thereby avoiding the problem of excessive flow rate caused by changes in atmospheric pressure and oxygen source pressure.

[0028] 3. The present invention has a simple and reasonable structure and is used in plateau trains to form a device for detecting environmental parameters such as oxygen concentration, pressure and temperature in the carriage; the device is suitable for large-scale promotion and use on plateau trains. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings:

[0030] Figure 1 This is a front view of a train oxygen supply detection device of the present invention;

[0031] Figure 2 It is a cross-sectional view of the air guide side and the waterproof housing of a train oxygen supply detection device of the present invention;

[0032] Figure 3 It is a schematic diagram of an electrical cavity of a train oxygen supply detection device of the present invention.

[0033] Reference numerals and corresponding component names:

[0034] 1-device housing, 101-air inlet, 102-air outlet, 103-second channel, 104-current limiting device, 105-filtering device, 106-pressure ring, 107-bypass channel, 108-second sealing groove and second sealing ring, 109-mounting hole, 110-electrical cavity, 2-waterproof housing, 201-sensor accommodating cavity, 202-first sealing groove and first sealing ring, 203-cavity cover, 204-first channel, 205-waterproof diaphragm, 3-oxygen sensor, 301-sealing ring, 4-circuit board, 5-connector. DETAILED DESCRIPTION

[0035] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0036] In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present invention. However, it is apparent to one of ordinary skill in the art that these specific details are not necessarily employed to practice the present invention. In other instances, well-known structures, circuits, materials, or methods are not specifically described in order to avoid obscuring the present invention.

[0037] Throughout the specification, references to "one embodiment," "an embodiment," "an example," or "an example" mean that a particular feature, structure, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment of the present invention. Therefore, the phrases "one embodiment," "an embodiment," "an example," or "an example" appearing in various places throughout the specification do not necessarily all refer to the same embodiment or example. In addition, particular features, structures, or characteristics may be combined in one or more embodiments or examples in any suitable combination and / or sub-combination. In addition, it will be appreciated by those of ordinary skill in the art that the figures provided herein are for illustrative purposes and that the figures are not necessarily drawn to scale. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0038] In the description of the present invention, it should be understood that the terms "front", "rear", "left", "right", "up", "down", "vertical", "horizontal", "high", "low", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the scope of protection of the present invention.

[0039] Example 1

[0040] like Figures 1 to 3 As shown, the present invention provides a train oxygen supply detection device, which includes a device housing 1, a waterproof housing 2, an oxygen sensor 3, a circuit board 4 and a connector 5; the waterproof housing 2 is arranged on the device housing 1, and the device housing 1 and the waterproof housing 2 are connected by bolts;

[0041] The interior of the waterproof housing 2 is a sensor accommodating chamber 201 with one end open, and the sensor accommodating chamber 201 is used to place the oxygen sensor 3; the circuit board 4 is arranged inside the device housing 1, and is electrically connected to the connector 5 and the oxygen sensor 3; the connector 5 is arranged on the outer wall of the device housing 1, and is electrically connected to the circuit board 4;

[0042] The device housing 1 includes an air inlet 101 and an air outlet 102 , and a bypass channel 107 communicating with the sensor accommodating cavity 201 is provided between the air inlet 101 and the air outlet 102 ; the waterproof housing 2 is communicated with the bypass channel 107 of the device housing 1 .

[0043] The device housing 1 is divided into an air-conducting side and an electrical side, the left side is the air-conducting side, and the right side is the electrical side; the air-conducting side is provided with an air inlet 101, an air outlet 102, and a second channel 103 connecting the air inlet 101 and the air outlet 102; one end of the bypass channel 107 is connected to the second channel 103, and the other end is arranged on the air-conducting side close to the waterproof housing 2, and is connected to the sensor accommodating cavity 201 through the first channel 204.

[0044] A flow limiting device 104 is provided on one side of the second channel 103 near the air inlet 101, and the flow limiting device 104 limits the oxygen flow rate. This is because the changes in plateau air pressure and oxygen source pressure cause a wide range of fluctuations in oxygen flow, so a flow limiting device is provided at the air inlet to prevent the changes in plateau air pressure and oxygen source pressure from causing a wide range of fluctuations in oxygen flow.

[0045] The current limiting device 104 includes a current limiting channel running through both ends of the current limiting device 104 , and the current limiting channel is a narrow channel processed from the second channel 103 ; as a preferred embodiment, the aperture of the current limiting channel is 0.3-0.7 mm.

[0046] The circuit board 4 includes a power module, a microprocessor, a pressure monitoring module, a temperature monitoring module, and a CO2 monitoring module.

[0047] The present invention designs an oxygen concentration detection device with waterproof function that can be used in a diffuse oxygen supply system. The present invention breaks the design idea that the conventional sensor is arranged on the channel between the air inlet and the air outlet, that is, the sensor is not placed on the channel between the air inlet and the air outlet, but a bypass channel is used for drainage, and a waterproof membrane is arranged at the bypass channel to block the flow of moisture into the sensor test cavity; the problem that when detecting the oxygen concentration of oxygen, the condensed moisture contacts the sensor in the oxygen detection device, causing sensor failure or damage is solved.

[0048] The present invention limits the oxygen flow rate entering the present invention by the aperture of the flow limiting device, thereby avoiding the problem of excessive flow rate caused by changes in atmospheric pressure and oxygen source pressure.

[0049] Example 2

[0050] like Figures 1 to 3 As shown, the difference between this embodiment and embodiment 1 is that the waterproof housing 2 is a rectangular parallelepiped, a first thread is provided near the opening end of the sensor accommodating cavity 201, a first platform is provided at the bottom of the first thread, and a first sealing groove and a first sealing ring 202 are provided on the first platform;

[0051] A first passage 204 penetrating the waterproof housing 2 is provided at a position without threads in the sensor accommodating cavity 201, and a waterproof membrane 205 is provided at the end of the first passage 204. As a preferred solution, the waterproof membrane 205 is a membrane made of polytetrafluoroethylene.

[0052] Specifically, the oxygen sensor 3 includes a detection unit, a sensor line and a sealing ring 301. One end of the sensor line is connected to the detection unit to provide power to the detection unit and output a sensor signal. The sealing ring 301 is provided with a wire hole for the sensor line to pass through. The sensor line passes through the sealing ring 301 through the wire hole and forms a sealed connection with the sealing ring 301.

[0053] The sealing ring 301 forms a sealing connection with the first sealing ring on the first platform.

[0054] Specifically, the waterproof shell 2 also includes a pressure ring and a cavity cover 203. The outer periphery of the pressure ring is provided with a second thread matching the first thread, and the sealing ring 301 is fixed in the sensor accommodating cavity 201 through the pressure ring; the cavity cover 203 is arranged at the open end of the waterproof shell 2, and a notch for leading out the sensor line is provided between the cavity cover 203 and the waterproof shell 2; this is considered to be arranged on the side of the waterproof shell close to the circuit board to facilitate the connection of the sensor line to the circuit board.

[0055] Example 3

[0056] like Figures 1 to 3 As shown, the difference between this embodiment and embodiment 1 is that a second sealing groove and a second sealing ring 108 are provided between the air guide side of the device housing 1 and the waterproof housing 2;

[0057] A filter device 105 and a pressure ring 106 for fixing the filter device 105 are also provided at the air inlet 101;

[0058] As a preferred solution, the filtering device 105 is a stainless steel sintered filter with a filter diameter of 3 to 5 um.

[0059] Specifically, the electrical side of the device housing 1 is provided with an electrical cavity 110 for accommodating the circuit board 4, and a protective cover for sealing the electrical cavity 110; one side of the electrical cavity 110 is provided with a through hole connected to the outer wall, and the wires of the connector 5 are connected to the circuit board 4 through the through hole; the side of the electrical cavity 110 close to the air guide side is provided with a sensor line introduction hole at a position corresponding to the notch.

[0060] Specifically, mounting holes 109 for fixing the device are provided around the device housing 1 .

[0061] The invention has a simple and reasonable structure and is applied to a device in plateau trains for detecting environmental parameters such as oxygen concentration, pressure and temperature in a carriage; the device is suitable for large-scale promotion and use in plateau trains.

[0062] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A train oxygen supply detection device, characterized in that: The device comprises a device housing (1), a waterproof housing (2), an oxygen sensor (3), a circuit board (4) and a connector (5); the waterproof housing (2) is arranged on the device housing (1); the interior of the waterproof housing (2) is a sensor accommodating chamber (201) with an open end; the sensor accommodating chamber (201) is used to accommodate the oxygen sensor (3); the circuit board (4) is arranged inside the device housing (1) and is electrically connected to the connector (5) and the oxygen sensor (3); the connector (5) is arranged on the outer wall of the device housing (1) and is electrically connected to the circuit board (4); The device housing (1) comprises an air inlet (101) and an air outlet (102), and a bypass channel (107) communicating with the sensor accommodating cavity (201) is provided between the air inlet (101) and the air outlet (102); the waterproof housing (2) is communicated with the bypass channel (107) of the device housing (1); The device housing (1) is divided into an air guide side and an electrical side, the air guide side being provided with an air inlet (101), an air outlet (102), and a second channel (103) communicating with the air inlet (101) and the air outlet (102); one end of the bypass channel (107) is communicated with the second channel (103), and the other end is provided on a side of the air guide side close to the waterproof housing (2) and communicated with the sensor accommodating chamber (201) through the first channel (204); The waterproof housing (2) is a rectangular parallelepiped, a first thread is provided near the opening end of the sensor accommodating cavity (201), a first platform is provided at the bottom of the first thread, and a first sealing groove and a first sealing ring (202) are provided on the first platform; A first channel (204) penetrating the waterproof housing (2) is provided at a position without threads in the sensor accommodating cavity (201), and a waterproof membrane (205) is provided at the port of the first channel (204).

2. A train oxygen supply detection device according to claim 1, characterized in that: A flow limiting device (104) is provided on one side of the second channel (103) close to the air inlet (101), wherein the flow limiting device (104) limits the oxygen flow rate.

3. A train oxygen supply detection device according to claim 2, characterized in that: The flow limiting device (104) comprises a flow limiting channel running through both ends of the flow limiting device (104); the flow limiting channel is a narrow channel machined from the second channel (103); and the aperture of the flow limiting channel is 0.3-0.7 mm.

4. A train oxygen supply detection device according to claim 1, characterized in that: The oxygen sensor (3) comprises a detection unit, a sensor wire and a sealing ring (301); one end of the sensor wire is connected to the detection unit for providing power to the detection unit and outputting a sensor signal; the sealing ring (301) is provided with a wire hole for the sensor wire to pass through; the sensor wire passes through the sealing ring (301) through the wire hole and forms a sealed connection with the sealing ring (301); The sealing ring (301) forms a sealing connection with the first sealing ring on the first platform.

5. A train oxygen supply detection device according to claim 4, characterized in that: The waterproof housing (2) further comprises a pressure ring and a cavity cover (203); a second thread matching the first thread is provided on the outer circumference of the pressure ring, and the sealing ring (301) is fixed in the sensor accommodating cavity (201) by means of the pressure ring; the cavity cover (203) is provided at the open end of the waterproof housing (2), and a notch for leading out a sensor line is provided between the cavity cover (203) and the waterproof housing (2).

6. A train oxygen supply detection device according to claim 1, characterized in that: A second sealing groove and a second sealing ring (108) are provided between the air guide side of the device housing (1) and the waterproof housing (2); A filter device (105) and a pressure ring (106) for fixing the filter device (105) are also provided at the air inlet (101).

7. A train oxygen supply detection device according to claim 5, characterized in that: An electrical cavity (110) for accommodating a circuit board (4) and a protective cover for sealing the electrical cavity (110) are provided on the electrical side of the device housing (1); a through hole communicating with the outer wall is provided on one side of the electrical cavity (110); an electric wire of the connector (5) is connected to the circuit board (4) through the through hole; and a sensor wire introduction hole is provided on a side of the electrical cavity (110) close to the air guide side at a position corresponding to the notch.

8. A train oxygen supply detection device according to claim 1, characterized in that: The circuit board (4) comprises a power module, a microprocessor, a pressure monitoring module, a temperature monitoring module, and a CO2 monitoring module.

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