CN112986192A - Oxygen sensor and respirator - Google Patents

Abstract

The invention provides an oxygen sensor and a breathing mask, the oxygen sensor comprises a shell and a photoelectric module, the photoelectric module comprises a fluorescent sheet, the shell comprises a hollow sleeve, the hollow sleeve comprises a containing cavity, the sleeve further comprises a first end and a second end opposite to the first end, the second end is provided with a vent communicated with the containing cavity, one end of the vent extends to the edge of the second end of the sleeve, the photoelectric module is arranged in the containing cavity of the sleeve, and the fluorescent sheet is positioned at one end of the photoelectric module, which is adjacent to the second end. According to the oxygen sensor and the breathing mask provided by the invention, the vent hole extending to the edge of the sleeve is formed in the sleeve, so that accumulated water at the vent hole or the fluorescent sheet can flow out along the vent hole in time, on one hand, the accuracy of the detection result of the oxygen sensor is ensured, on the other hand, the accumulated water in the shell is avoided, the performance of the fluorescent sheet is ensured not to be influenced by the accumulated water, and further, the service life of the fluorescent sheet is prolonged.

Description

Oxygen sensor and respirator

Technical Field

The invention relates to the technical field of sensors, in particular to an oxygen sensor and a breathing mask.

Background

The oxygen sensors in the prior art can be classified into electrochemical oxygen sensors, optical fiber oxygen sensors, thermomagnetic oxygen sensors, semiconductor resistance oxygen sensors, etc. according to different working principles. Currently, practical oxygen sensors mainly include lead-containing oxygen sensors, concentration cell type zirconium dioxide oxygen sensors, semiconductor resistance type titanium dioxide oxygen sensors and optical fiber oxygen sensors based on fluorescence quenching principle based on the conventional electrochemical principle, and the oxygen sensors based on different principles have different application ranges due to their characteristics. In contrast, the fluorescence oxygen sensor is well-valued by people because of its advantages of simple operation, high sensitivity, no consumption of the substance to be measured, easy miniaturization, safe use and on-line monitoring.

The oxygen sensor generally comprises a shell and a photoelectric module, wherein the photoelectric module comprises a fluorescent sheet, the shell is provided with a vent hole opposite to the fluorescent sheet, and the fluorescent sheet is generally close to the vent hole. Steam can be usually along with gaseous entering casing to condense in the casing and form ponding, influence oxygen sensor's testing result on the one hand, on the other hand influences the performance of fluorescence piece, and then influences the life of fluorescence piece.

The foregoing description is provided for general background information and is not admitted to be prior art.

Disclosure of Invention

The invention aims to provide an oxygen sensor and a breathing mask for preventing water accumulation in the oxygen sensor.

The invention provides an oxygen sensor which comprises a shell and a photoelectric module, wherein the photoelectric module comprises a fluorescent sheet, the shell comprises a sleeve, the sleeve is hollow and comprises an accommodating cavity, the sleeve further comprises a first end and a second end opposite to the first end, a vent hole communicated with the accommodating cavity is formed in the second end, one end of the vent hole extends to the edge of the second end of the sleeve, the photoelectric module is arranged in the accommodating cavity of the sleeve, and the fluorescent sheet is positioned at one end, adjacent to the second end, of the photoelectric module.

In one embodiment, the vent is a cross-shaped groove, and the ends of four sides of the cross-shaped groove extend to the edge of the second end of the sleeve.

In one embodiment, the housing further includes a connection ring, the connection ring is sleeved outside the sleeve, a convex ring is convexly arranged on the outer wall of the sleeve, and a gap is arranged between the connection ring and the convex ring.

In one embodiment, the sleeve and the connecting ring are axially movable relative to each other, so that the width of the gap is adjustable.

In one embodiment, a heating element for heating is further arranged in the shell.

In one embodiment, the housing further comprises an outer cover that interfaces with the first end of the sleeve.

In one embodiment, the housing further comprises an outer cover that interfaces with the first end of the sleeve.

In one embodiment, the optoelectronic module further includes a front bracket, a rear bracket and a circuit board, one end of the front bracket is disposed on an inner wall of the second end of the sleeve, the rear bracket is located between the front bracket and the circuit board and is respectively and fixedly connected to the front bracket and the circuit board, and one end of the circuit board is disposed on the outer cover; the photoelectric module further comprises an excitation light source, a reference light source, a fluorescent light filter, an excitation light filter and a photoelectric detector, wherein the excitation light filter, the fluorescent light filter and the photoelectric detector are sequentially arranged on a light path of excitation light emitted by the excitation light source, and the fluorescent light filter and the photoelectric detector are sequentially arranged on a light path of compensation light emitted by the reference light source.

In one embodiment, the vent extends to the side wall of the sleeve and forms a bottom surface on the side wall of the sleeve; the outer wall of the front support is further provided with a groove, a sealing element is arranged at the groove and is also contacted with the inner wall of the sleeve, and the bottom surface of the air vent is closer to the outer surface of the second end of the sleeve than the sealing surface of the sealing element.

In one embodiment, the optoelectronic module further includes a window sheet and a dichroic mirror, the fluorescent sheet is attached to the window sheet, the excitation light source, the excitation filter and the dichroic mirror are fixed to the front bracket, the fluorescent filter and the reference light source are fixed to the rear bracket, the photodetector is fixed to the circuit board, the dichroic mirror is inclined at a certain angle with respect to the fluorescent sheet, the excitation filter is disposed on one side of the excitation light source and adapted to filter the excitation light emitted from the excitation light source, the dichroic mirror is adapted to reflect the emergent light from the excitation filter to the fluorescent sheet, the fluorescent sheet is adapted to receive the excitation light reflected from the dichroic mirror and emit a fluorescent signal, the dichroic mirror is further adapted to allow the fluorescent signal to pass through and emit to the fluorescent filter, and the dichroic mirror is further adapted to reflect the compensation light to the fluorescent filter, the photodetector is adapted to receive the fluorescent signal emitted through the fluorescent filter and the compensating light.

In one embodiment, the vent extends to the side wall of the sleeve and forms a bottom surface on the side wall of the sleeve; the front mount includes a front face facing the second end of the sleeve, the bottom surface of the vent being farther from an outer surface of the second end than the front face of the front mount.

In one embodiment, the oxygen sensor further comprises a connecting wire and an acquisition module, wherein one end of the connecting wire is electrically connected to the photoelectric module, and the other end of the connecting wire is electrically connected to the acquisition module; the heating member is located the sleeve the fore-stock with on the after-poppet at least one, the heating member includes the link, link electric connection in the connecting wire.

The invention also provides a breathing mask which comprises the oxygen sensor and the mask, wherein the mask is connected with the shell.

According to the oxygen sensor and the breathing mask provided by the invention, the vent hole extending to the edge of the sleeve is formed in the sleeve, so that accumulated water at the vent hole or the fluorescent sheet can flow out along the vent hole in time, on one hand, the accuracy of the detection result of the oxygen sensor is ensured, on the other hand, the accumulated water in the shell is avoided, the performance of the fluorescent sheet is ensured not to be influenced by the accumulated water, and further, the service life of the fluorescent sheet is prolonged.

Drawings

Fig. 1 is an assembly view of an oxygen sensor according to an embodiment of the present invention.

Fig. 2 is an exploded view of a portion of the elements of the oxygen sensor shown in fig. 1.

FIG. 3 is a partially exploded view of a portion of the components of the oxygen sensor shown in FIG. 1.

Fig. 4 is a schematic cross-sectional view of the oxygen sensor shown in fig. 1.

Fig. 5 is a graph showing comparison between the measurement results of the oxygen sensor shown in fig. 1 and an oxygen sensor provided with a lens.

Fig. 6 is a schematic view of the optical path of the oxygen sensor shown in fig. 1.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

Referring to fig. 1 to 3, an oxygen sensor according to an embodiment of the present invention includes a housing 10 and a photovoltaic module 30. Referring to fig. 4, the optoelectronic module 30 includes an excitation light source 32 (see fig. 6), a reference light source 34 (see fig. 6), a fluorescent sheet 36, a fluorescent filter 38, an excitation filter 40 (see fig. 6), and a photodetector 42, wherein the excitation filter 40, the fluorescent sheet 36, the fluorescent filter 38, and the photodetector 42 are adapted to sequentially receive excitation light emitted from the excitation light source 32, and the fluorescent filter 38 and the photodetector 42 are adapted to sequentially receive compensation light emitted from the reference light source 34. The excitation light source 32, the reference light source 34, the fluorescent sheet 36, the fluorescent filter 38, the excitation filter 40 and the photodetector 42 of the optoelectronic module 30 are all disposed in the housing 10. The housing 10 comprises a sleeve 11 and an outer cover 13, the sleeve 11 is hollow and comprises a containing cavity 110, the sleeve 11 further comprises a first end 112 provided with an opening and a second end 114 opposite to the first end 112, the opening is communicated with the containing cavity 110. The second end 114 of the sleeve 11 is provided with a vent 115 communicated with the accommodating cavity 110, one end of the vent 115 extends to the edge of the second end 114 of the sleeve 11, and the fluorescent sheet 36 is located in the accommodating cavity 110 and is adjacent to the second end 114 of the sleeve 11. The outer cover 13 includes a cavity 132, and one end of the outer cover 13 is provided with an opening communicating with the cavity 132, and the end of the outer cover 13 provided with the opening abuts against the first end 112 of the sleeve 11. Specifically, the excitation light source 32 is configured to emit excitation light, the fluorescent patch 36 may be specifically coated with an oxyfluorescence sensitive luminescent material to emit fluorescence after optical excitation, the excitation filter 40 is configured to filter the excitation light, the reference light source 34 is configured to emit compensation light, and the fluorescence filter 38 is configured to filter the fluorescence and the compensation light.

Among the oxygen sensor of this embodiment, through set up the blow vent 115 that extends to the edge of sleeve 11 on sleeve 11, can make the ponding of blow vent 115 or fluorescence piece 36 department in time flow out along blow vent 115, guaranteed oxygen sensor's the accuracy of testing result on the one hand, ponding in the casing 10 is avoided to on the other hand, guarantees that fluorescence piece 36's performance is not influenced by ponding, and then has prolonged fluorescence piece 36's life.

In this embodiment, the vent 115 is a cross slot, and the ends of four sides of the cross slot extend to the edge of the second end 114 of the sleeve 11. More specifically, the intersection of the cross slots is located at a mid-portion of the second end 114 of the sleeve 11. The cross groove can make the area of the vent hole 115 larger, and the ventilation area is increased to facilitate gas exchange. It is understood that the vent 115 may also have other shapes, such as a slotted in-line slot. Specifically, the cross-sectional shape of the vent 115 may be rectangular.

Specifically, the vent 115 extends to the sidewall of the sleeve 11 and forms a floor 1152 on the sidewall of the sleeve 11.

In this embodiment, the housing 10 further includes a connection ring 15, and a protruding ring 116 is protruded on the outer wall of the sleeve 11. The connecting ring 15 is sleeved outside the sleeve 11, a gap 118 is formed between the connecting ring 15 and the convex ring 116, and the connecting ring 15 is fixedly connected to the outer cover 13.

Specifically, the outer wall of the sleeve 11 adjacent the second end 114 is threaded, the connection ring 15 is threaded, and the connection ring 15 and the sleeve 11 are threadedly coupled. By rotating the sleeve 11, the width of the gap 118 can be adjusted, which can be adapted to different masks (not shown). It will be appreciated that the sleeve 11 and the coupling ring 15 may be sleeved in other ways, for example, directly by friction, as long as the sleeve 11 and the coupling ring 15 are axially movable relative to each other to adjust the distance between the protruding ring 116 and the coupling ring 15.

In this embodiment, the optoelectronic module 30 further includes a window sheet 37, the fluorescent sheet 36 is attached to the window sheet 37, and the window sheet 37 supports the fluorescent sheet 36. Specifically, the fluorescent sheet 36 is closer to the outside of the housing 10 than the window sheet 37. In particular, the window sheet 37 may be a high-transmittance glass sheet.

In this embodiment, one end of the optoelectronic module 30 is disposed near the inner wall of the second end 114 of the sleeve 11, and the other end is disposed near the inner wall of the outer cover 13 connected to the sleeve 11. Specifically, the outer cap 13 and the coupling ring 15 are respectively provided with coupling holes through which the fastening members 119 pass to fixedly couple the outer cap 13 and the coupling ring 15.

In this embodiment, the optoelectronic module 30 further includes a front bracket 44, a rear bracket 46, and a circuit board 48. One end of the front bracket 44 abuts against the inner wall of the second end 114 of the sleeve 11, the rear bracket 46 is located between the front bracket 44 and the circuit board 48 and is fixedly connected to the front bracket 44 and the circuit board 48, respectively, and one end of the circuit board 48 abuts against the outer cover 13.

Specifically, a groove 444 is further formed in the outer wall of the front bracket 44, a sealing member 445 is disposed at the groove 444, and the sealing member 445 is further in contact with the inner wall of the sleeve 11 to realize sealing between the sleeve 11 and the front bracket 44. The sealing performance of the sealing member 445 is better, so that the cleanness and the integral air tightness of the internal photoelectric module 30 are ensured, and the sealing member 445 can be a sealing ring or a sealing gasket and the like. The bottom surface 1152 of the vent 115 is closer to the outer surface of the second end 114 of the sleeve 11 than the sealing surface of the seal 445, thereby preventing standing water from flowing into the interior of the optoelectronic module 30 and ensuring that the overall seal of the oxygen sensor is not compromised.

Specifically, the optoelectronic module 30 further includes a dichroic mirror 49, the excitation light source 32, the excitation filter 40, and the dichroic mirror 49 are fixed on the front support 44, the fluorescence filter 38 and the reference light source 34 are fixed on the rear support 46, and the photodetector 42 is fixed on the circuit board 48. The dichroic mirror 49 is tilted at an angle (preferably 45) with respect to the phosphor sheet 36. The excitation filter 40 is disposed on one side of the excitation light source 32 and adapted to filter the excitation light emitted from the excitation light source 32, the dichroic mirror 49 is adapted to reflect the light emitted from the excitation filter 40 to the fluorescent plate 36, the fluorescent plate 36 is adapted to receive the excitation light reflected from the dichroic mirror 49 and emit a fluorescent signal, the dichroic mirror 49 is further adapted to allow the fluorescent signal to pass through and to the fluorescent filter 38, the dichroic mirror 49 is further adapted to reflect the compensation light to the fluorescent filter 38, and the photodetector 42 is adapted to receive the fluorescent signal and the compensation light emitted through the fluorescent filter 38. More specifically, the dichroic mirror 49 is obliquely disposed toward the fluorescent sheet 36, the excitation light source 32 and the reference light source 34 are respectively disposed on both sides of the dichroic mirror 49, the excitation filter 40 is disposed facing the excitation light source 32 and between the excitation light source 32 and the dichroic mirror 49, the fluorescent sheet 36 and the excitation filter 40 are disposed on the same side of the dichroic mirror 49, the reference light source 34 and the fluorescent filter 38 are disposed on the same side of the dichroic mirror 49, and the photodetector 42 is disposed on a side of the fluorescent filter 38 away from the dichroic mirror 49. More specifically, the excitation filter 40 is perpendicular to the fluorescent sheet 36, the fluorescent filter 38 and the photodetector 42 are parallel to the fluorescent sheet 36, and the fluorescent sheet 36, the fluorescent filter 38 and the photodetector 42 are coaxially disposed.

Specifically, the front support 44 includes a front face 447 that faces the second end 114 of the sleeve 11, and the bottom surface 1152 of the vent 115 is farther from the outer surface of the second end 114 than the front face 447 of the front support 44. In this way, the fluorescent sheet 36 is mounted on the front bracket 44, and the bottom surface 1152 of the air vent 115 is lower than the front end surface 447 of the front bracket 44, so that a groove for accumulating water is avoided from being formed at the front end surface 44, and the accumulated water can be more favorably discharged from the air vent 115 in time.

In this oxygen sensor, need not to set up the lens, consequently can reduce whole oxygen sensor's volume, realize oxygen sensor's miniaturization, portable more, and can reduce oxygen sensor's manufacturing cost. Referring to fig. 5, the oxygen partial pressure result measured by the oxygen sensor of the present embodiment is almost the same as the oxygen partial pressure result measured by the oxygen sensor with a lens when the lens is not provided, which illustrates that the oxygen sensor of the present embodiment can still ensure the accuracy of the measurement when the lens is omitted.

In this embodiment, the oxygen sensor further includes a connecting wire 50 and an acquisition module 70, wherein one end of the connecting wire 50 is electrically connected to the circuit board 48 of the optoelectronic module 30, and the other end is electrically connected to the acquisition module 70. The electrical signal of the oxygen sensor can be output through the connection line 50 and the acquisition module 70.

Specifically, the connection cord 50 includes a front end 52 and a rear end 54, the front end 52 being received within the cavity 132 of the cover 13, the rear end 54 extending out of the cover 13 and being connected to the collection module 70. The outer cover 13 is provided with a through groove 134 and a clamping groove 136, the rear end 54 passes through the through groove 134 and extends out of the outer cover 13, the periphery of the front end 52 is further provided with a clamping ring 522, and the clamping ring 522 is clamped in the clamping groove 136 so as to clamp and fixedly connect the connecting wire 50 and the outer cover 13. The acquisition module 70 comprises a first connector 72 and a second connector 74, the connection line 50 being connected to the acquisition module 70 by the first connector 72. It will be appreciated that the second connector 74 may be omitted when the acquisition module 70 is powered by a built-in battery and wirelessly transmits data. The acquisition module 70 is used for processing the electrical signal transmitted by the computer board 48 to obtain the oxygen partial pressure, and transmitting the oxygen partial pressure through the second connector 74.

In this embodiment, a heating element 90 is further disposed in the housing 10 of the oxygen sensor. Can prevent the steam condensation in casing 10 and form ponding through setting up heating member 90, can further avoid casing 10 internal ponding, guarantee that the performance of fluorescence piece 36 is not influenced by ponding, and then prolonged the life of fluorescence piece 36. Specifically, the heating member 90 may be provided on at least one of the sleeve 11, the front supporter 44 and the rear supporter 46. In the embodiment, the heating members 90 are disposed on the front and rear supports 44, 46, and the sleeve 11, the front and rear supports 44, 46 are made of a heat conductive material such as a metal material, specifically, aluminum (Al), copper (Cu), etc. The heating member 90 includes a connecting terminal 92, and the connecting terminal 92 is electrically connected to the connecting line 50 to energize the heating member 90 through the connecting line 50 for heating. The oxygen sensor further includes a temperature sensor (not shown) for detecting the temperature of the sleeve 11, the front supporter 44 and/or the rear supporter 46, and the preset temperature range may be 35-45 ℃ when the temperature of the sleeve 11, the front supporter 44 and/or the rear supporter 46 is controlled to be maintained within the preset temperature range by controlling the heating member 90 to be turned on for heating or controlling the heating member 90 to be turned off.

FIG. 6 is a schematic diagram of the optical path of the oxygen sensor of the present invention, in which the implementation arrow is the excitation light path, the dot-dash line is the fluorescence path, and the dotted line is the reference light path. Excitation light emitted by the laser source 32 passes through the excitation filter 40, is reflected by the dichroic mirror 49, then passes through the window piece 37 to excite the fluorescent piece 36 to generate fluorescence, and the fluorescence passes through the window piece 37, passes through the dichroic mirror 49, then passes through the fluorescent filter 38, and is received by the photoelectric detector 42 to generate an electric signal; the reference light emitted by the reference light source 34 is reflected by the dichroic mirror 49, passes through the fluorescence filter 38, and is received by the photodetector 42 to generate an electrical signal, and the reference light is used for compensating system errors, so that the measurement accuracy is improved.

The oxygen sensor of the present embodiment can be applied to a breathing mask, and of course, the oxygen sensor of the present embodiment can also be applied to other occasions and apparatuses, which is not limited herein.

The invention also provides a breathing mask, which comprises the oxygen sensor and the mask, wherein the mask is provided with a matching hole, the mask is arranged on the sleeve 11 in a penetrating way and clamped in a gap 118 between the connecting ring 15 and the convex ring 116 of the sleeve 11, and thus the mask is connected with the shell 10. In the case of different mask thicknesses, the position of the connection ring 15, i.e., the width of the gap 118, can be adjusted so that the mask can be securely clamped therein.

In the drawings, the size and relative sizes of layers and regions may be exaggerated for clarity. It will be understood that when an element such as a layer, region or substrate is referred to as being "formed on," "disposed on" or "located on" another element, it can be directly on the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly formed on" or "directly disposed on" another element, there are no intervening elements present.

In this document, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms can be understood in a specific case to those of ordinary skill in the art.

In this document, the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "vertical", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for the purpose of clarity and convenience of description of the technical solutions, and thus, should not be construed as limiting the present invention.

As used herein, the ordinal adjectives "first", "second", etc., used to describe an element are merely to distinguish between similar elements and do not imply that the elements so described must be in a given sequence, either temporally, spatially, in ranking, or in any other manner.

As used herein, the meaning of "a plurality" or "a plurality" is two or more unless otherwise specified.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

As used herein, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, including not only those elements listed, but also other elements not expressly listed.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims (12)

1. The utility model provides an oxygen sensor, includes casing (10) and photovoltaic module (30), characterized in that, photovoltaic module (30) includes fluorescence piece (36), casing (10) includes sleeve (11), sleeve (11) cavity, it is including holding chamber (110), sleeve (11) still include first end (112) and with second end (114) relative first end (112), set up on second end (114) with hold the blow vent (115) of chamber (110) intercommunication, the one end of blow vent (115) extends to sleeve (11) the edge of second end (114), photovoltaic module (30) are located sleeve (11) hold in chamber (110), fluorescence piece (36) are located photovoltaic module (30) the one end adjacent with second end (114).

2. The oxygen sensor according to claim 1, wherein the vent (115) is a cross-slot having four sides terminating in an edge extending to the second end (114) of the sleeve (11).

3. The oxygen sensor according to claim 1, wherein the housing (10) further comprises a connecting ring (15), the connecting ring (15) is sleeved outside the sleeve (11), a convex ring (116) is convexly arranged on the outer wall of the sleeve (11), and a gap (118) is arranged between the connecting ring (15) and the convex ring (116).

4. An oxygen sensor according to claim 3, characterized in that the sleeve (11) and the connection ring (15) are axially relatively movable, so that the width of the gap (118) is adjustable.

5. The oxygen sensor according to claim 1, wherein a heating member (90) for heating is further provided in the housing (10).

6. The oxygen sensor of claim 1, wherein the housing (10) further comprises an outer cover (13), the outer cover (13) interfacing with the first end (112) of the sleeve (11).

7. The oxygen sensor according to claim 6, wherein the optoelectronic module (30) further comprises a front bracket (44), a rear bracket (46) and a circuit board (48), wherein one end of the front bracket (44) abuts against the inner wall of the second end (114) of the sleeve (11), the rear bracket (46) is located between the front bracket (44) and the circuit board (48) and fixedly connected to the front bracket (44) and the circuit board (48), respectively, and one end of the circuit board (48) abuts against the outer cover (13); the photoelectric module (30) further comprises an excitation light source (32), a reference light source (34), a fluorescent light filter (38), an excitation light filter (40) and a photoelectric detector (42), wherein the excitation light filter (40) and the fluorescent sheet (36) are sequentially arranged on a light path of excitation light emitted by the excitation light source (32), and the fluorescent light filter (38) and the photoelectric detector (42) are sequentially arranged on a light path of compensation light emitted by the reference light source (34).

8. The oxygen sensor according to claim 7, wherein the vent (115) extends to a side wall of the sleeve (11) and forms a bottom surface (1152) on the side wall of the sleeve (11); a groove (444) is further formed in the outer wall of the front support (44), a sealing element (445) is arranged at the position of the groove (444), the sealing element (445) is also in contact with the inner wall of the sleeve (11), and the bottom surface (1152) of the vent opening (115) is closer to the outer surface of the second end (114) of the sleeve (11) than a sealing surface of the sealing element (445).

9. The oxygen sensor according to claim 7, wherein the optoelectronic module (30) further comprises a window sheet (37) and a dichroic mirror (49), the fluorescent sheet (36) is attached to the window sheet (37), the excitation light source (32), the excitation filter (40) and the dichroic mirror (49) are fixed to the front support (44), the fluorescent filter (38) and the reference light source (34) are fixed to the rear support (46), the photodetector (42) is fixed to the circuit board (48), the dichroic mirror (49) is inclined at a certain angle with respect to the fluorescent sheet (36), the excitation filter (40) is disposed on one side of the excitation light source (32) and adapted to filter the excitation light emitted from the excitation light source (32), and the dichroic mirror (49) is adapted to reflect light emitted from the excitation filter (40) to the fluorescent sheet (36), the fluorescence sheet (36) is adapted to receive excitation light reflected by the dichroic mirror (49) and to emit a fluorescence signal, the dichroic mirror (49) is further adapted to pass the fluorescence signal through to the fluorescence filter (38), the dichroic mirror (49) is further adapted to reflect the compensation light to the fluorescence filter (38), and the photodetector (42) is adapted to receive the fluorescence signal and the compensation light emitted through the fluorescence filter (38).

10. The oxygen sensor according to claim 7, wherein the vent (115) extends to a side wall of the sleeve (11) and forms a bottom surface (1152) on the side wall of the sleeve (11); the front bracket (44) includes a front face (447) facing the second end (114) of the sleeve (11), the bottom surface (1152) of the air vent (115) being further from an outer surface of the second end (114) than the front face (447) of the front bracket (44).

11. The oxygen sensor according to claim 5, further comprising a connection line (50) and an acquisition module (70), wherein one end of the connection line (50) is electrically connected to the optoelectronic module (30) and the other end is electrically connected to the acquisition module (70); the heating element (90) is arranged on at least one of the sleeve (11), the front support (44) and the rear support (46), the heating element (90) comprises a connecting end (92), and the connecting end (92) is electrically connected to the connecting wire (50).

12. A breathing mask, characterized by comprising an oxygen sensor according to any one of claims 1 to 11 and a mask, said mask being connected to said housing (10).

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