CN214584903U - Oxygen sensor and respirator - Google Patents

Abstract

The utility model provides an oxygen sensor and respirator, this oxygen sensor include casing and photovoltaic module, the mounting hole has been seted up to the one end of casing, and photovoltaic module includes fluorescence piece subassembly and receiving and dispatching light subassembly, fluorescence piece subassembly includes support piece and fluorescence piece, the fluorescence piece install in the support piece, support piece detachably install in the casing mounting hole department, receiving and dispatching light subassembly is located in the casing. The utility model provides an among oxygen sensor and respirator, because fluorescence piece and support piece constitute a fluorescence piece subassembly alone to detachably installs on the casing, consequently when the fluorescence piece is impaired, can directly easily change fluorescence piece subassembly, and is very convenient, has made things convenient for oxygen sensor's maintenance greatly.

Description

Oxygen sensor and respirator

Technical Field

The utility model relates to a sensor technical field especially relates to an oxygen sensor and respirator.

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, and a vent hole is formed in the position, right opposite to the fluorescent sheet, of the shell. The phosphor patch is typically located immediately adjacent to the vent hole and is therefore highly susceptible to damage from outside the housing. The current fluorescent sheet is usually installed inside the housing and assembled with other parts of the photovoltaic module as a whole, so that when the fluorescent sheet is damaged, the fluorescent sheet is inconvenient to replace.

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

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a convenient oxygen sensor and respirator are changed to fluorescence piece.

The utility model provides an oxygen sensor, including casing and photoelectric module, the mounting hole has been seted up to the one end of casing, photoelectric module includes fluorescence piece subassembly and receiving and dispatching light subassembly, fluorescence piece subassembly includes support piece and fluorescence piece, the fluorescence piece install in the support piece, support piece detachably install in the casing mounting hole department, receiving and dispatching light subassembly is located in the casing.

In one embodiment, the fluorescent sheet assembly further includes a window sheet, the fluorescent sheet is attached to the window sheet, the window sheet is fixed in the supporting member, and the fluorescent sheet is located on one side of the window sheet facing the outside of the housing.

In one embodiment, the supporting member includes a mounting portion and an operating portion, the operating portion is connected to the housing, and the mounting portion extends out of the housing.

In one embodiment, the casing includes a sleeve and an outer cover, the sleeve is hollow and includes a containing cavity, the sleeve further includes a first end provided with an opening and a second end opposite to the first end, the opening of the sleeve is communicated with the containing cavity, the outer cover includes a cavity, an opening communicated with the cavity is provided at one end of the outer cover, the end of the outer cover provided with the opening is abutted to the first end of the sleeve, and the mounting hole is provided at 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, the light receiving and emitting assembly includes an excitation light source, a reference light source, a fluorescence filter, an excitation filter, a photodetector, a front bracket, a rear bracket and a circuit board, one end of the front bracket is close to the 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, one end of the circuit board is close to the outer cover, the excitation light source and the excitation filter are fixed on the front bracket, the fluorescence filter and the reference light source are fixed on the rear bracket, and the photodetector is fixed on the circuit board.

In one embodiment, an extension part extending into the shell is further arranged at one end of the mounting part away from the operating part; the front bracket is provided with an opening, and the extension part of the support piece extends into the opening and is abutted against the front bracket.

In one embodiment, the outer wall of the front bracket is further provided with a groove, a sealing element is arranged at the groove, and the sealing element is also contacted with the inner wall of the sleeve.

The utility model also provides a breathing mask, including above-mentioned oxygen sensor and face guard, the face guard with the casing is connected.

The utility model provides an among oxygen sensor and respirator, because fluorescence piece and support piece constitute a fluorescence piece subassembly alone to detachably installs on the casing, consequently when the fluorescence piece is impaired, can directly easily change fluorescence piece subassembly, and is very convenient, has made things convenient for oxygen sensor's maintenance greatly.

Drawings

Fig. 1 is an assembly diagram 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 the embodiments of the present invention is provided with reference to 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 also to fig. 4, the optoelectronic module 30 includes a fluorescent sheet assembly 36 and a light transmitting and receiving assembly. The light receiving and transmitting assembly comprises an excitation light source 32, a reference light source 34, a fluorescent filter 38, an excitation filter 40 and a photoelectric detector 42, wherein the excitation filter 40, the fluorescent filter assembly 36, the fluorescent filter 38 and the photoelectric detector 42 are sequentially arranged on a light path of excitation light emitted by the excitation light source 32, and the fluorescent filter 38 and the photoelectric detector 42 are sequentially arranged on a light path of compensation light emitted by the reference light source 34. One end of the housing 10 is opened with a mounting hole 102, and the light receiving and emitting assembly is disposed in the housing 10. The fluorescent sheet assembly 36 includes a support member 362 and a fluorescent sheet 364, the fluorescent sheet 364 is mounted in the support member 362, and the support member 362 is detachably mounted at the mounting hole 102 of the housing 10 and partially protrudes out of the housing 10. It is understood that support member 362 may not extend outside of housing 10, but extending outside of housing 10 may facilitate removal of fluorescent sheet assembly 36. Specifically, the excitation light source 32 is used to emit excitation light, the fluorescence sheet 364 may be specifically coated with an oxyfluorescence sensitive luminescent material to emit fluorescence after light excitation, the excitation filter 40 is used to filter the excitation light, the reference light source 34 is used to emit compensation light, and the fluorescence filter 38 is used to filter the fluorescence and the compensation light.

In the oxygen sensor of the embodiment, since the fluorescent sheet 364 and the supporting member 362 form a fluorescent sheet assembly 36 separately and are detachably mounted on the housing 10, when the fluorescent sheet 362 is damaged, the fluorescent sheet assembly 36 can be replaced easily and directly, which is very convenient and greatly facilitates the maintenance of the oxygen sensor.

In this embodiment, phosphor patch assembly 36 further includes a window patch 366, phosphor patch 364 is attached to window patch 366, and window patch 366 supports phosphor patch 364. The window piece 366 is fixed within the support member 362. The fluorescent sheet 364 is positioned at a side of the window sheet 366 toward the outside of the housing 10. In particular, the window sheet 37 may be a high-transmittance glass sheet.

Specifically, the support 362 includes a mounting portion 368 and an operating portion 369, the mounting portion 368 is connected to the housing 10, and the operating portion 369 protrudes outside the housing 10. The mounting portion 368 may be detachably connected to the housing 10 by a screw coupling or a snap coupling. The support 362 is provided with a vent 371 to allow oxygen to pass through. More specifically, an end of the mounting portion 368 away from the operating portion 369 is further provided with an extending portion 373 extending into the housing 10, and a connection portion between the mounting portion 368 and the extending portion 373 is provided with a step. Through setting up operation portion 369 can make things convenient for the staff to hold when dismouting fluorescence piece subassembly 36, make things convenient for the dismouting.

In this embodiment, the housing 10 includes a sleeve 11, an outer cover 13, and a connection ring 15. 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, and a convex ring 116 is convexly arranged on the outer wall of the sleeve 11. The outer lid 13 includes a cavity 132, and an end of the outer lid 13 is provided with an opening communicating with the cavity 132. The end of the outer cover 13 provided with the opening abuts against the first end 112 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. The mounting hole 102 is provided at the second end 114 of the sleeve 11. One end surface of the optoelectronic module 30 adjacent to the fluorescent sheet assembly 36 is disposed against the inner wall of the second end 114 of the sleeve 11, and the end of the optoelectronic module 30 opposite to the fluorescent sheet assembly 36 is disposed against 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. Specifically, the mounting hole 102 of the housing 10 opens at the second end 114 of the sleeve 11.

Specifically, the outer wall of the sleeve 11 adjacent the first end 112 is threaded, the connector ring 15 is threaded, and the connector ring 15 and the sleeve 11 are threadedly coupled. In this embodiment, the threads are disposed between the collar 116 and the first end 112 of the sleeve 11. 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 transceiver module 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, the front bracket 44 is provided with an opening 442, the extension 373 of the supporting member 362 extends into the opening 442 and abuts against the front bracket 44, and the end of the front bracket 44 abuts against the step of the supporting member 362. The outer wall of the front bracket 44 is further provided with a groove 444, a sealing member 445 is arranged at the groove 444, and the sealing member 445 is further contacted 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 improved, so that the cleanness and the overall airtightness of the internal photovoltaic module 30 are ensured.

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 inclined at an angle (preferably 45 °) with respect to the fluorescent sheet 364, the dichroic mirror 49 is disposed toward the fluorescent sheet 364, the excitation light source 32 and the reference light source 34 are respectively disposed at both sides of the dichroic mirror 49, the excitation filter 40 is disposed opposite to the excitation light source 32 and between the excitation light source 32 and the dichroic mirror 49, the fluorescent sheet 364 and the excitation filter 40 are disposed at the same side of the dichroic mirror 49, the reference light source 34 and the fluorescent filter 38 are disposed at the same side of the dichroic mirror 49, and the photodetector 42 is disposed at a side of the fluorescent filter 38 away from the dichroic mirror 49. More specifically, the excitation filter 40 is perpendicular to the fluorescence sheet 364, the fluorescence filter 38 and the photodetector 42 are parallel to the fluorescence sheet 364, and the fluorescence sheet 364, the fluorescence filter 38 and the photodetector 42 are coaxially disposed. 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.

Specifically, the circuit board 48 is a tube with an open end, and includes a bottom plate 482 and a side plate 484, at least a portion of the front bracket 44 and the rear bracket 46 are accommodated in the circuit board 48, the photodetector 42 is disposed on the bottom plate 482, the excitation light source 32 and the reference light source 34 are disposed on the side plate 484, and the excitation light source 32 and the reference light source 34 are electrically connected to the circuit board 48, respectively.

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 another embodiment, the collection module 70 may be disposed in the cover 13 for wireless data transmission, and the rear end 54 of the connection line 50 may be omitted, so that the whole oxygen sensor structure may be more compact and portable.

Fig. 6 is a schematic diagram of the optical path principle of the oxygen sensor of the present invention, in which the implementation arrow is an excitation light path, the dot-dash line is a fluorescence path, and the dotted line is a 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 sheet 366 to excite the fluorescence sheet 364 to generate fluorescence, and the fluorescence passes through the window sheet 366, passes through the dichroic mirror 49, then passes through the fluorescence 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 utility model also provides a breathing mask, it includes above-mentioned oxygen sensor and face guard, sets up the mating holes on the face guard, and on sleeve 11 was worn to locate by the face guard to the clearance 118 department between go-between 15 of sleeve 11 and bulge loop 116 is established to the card, is connected the face guard with oxygen sensor's casing 10 from this. 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 sake 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 protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. The oxygen sensor comprises a shell (10) and a photoelectric module (30), and is characterized in that a mounting hole (102) is formed in one end of the shell (10), the photoelectric module (30) comprises a fluorescent sheet assembly (36) and a light receiving and emitting assembly, the fluorescent sheet assembly (36) comprises a supporting piece (362) and a fluorescent sheet (364), the fluorescent sheet (364) is mounted in the supporting piece (362), the supporting piece (362) is detachably mounted at the mounting hole (102) of the shell (10), and the light receiving and emitting assembly is arranged in the shell (10).

2. The oxygen sensor according to claim 1, wherein the phosphor plate assembly (36) further comprises a window plate (366), the phosphor plate (364) is attached to the window plate (366), the window plate (366) is fixed in the support member (362), and the phosphor plate (364) is located on a side of the window plate (366) facing the outside of the housing (10).

3. The oxygen sensor according to claim 1, wherein the support member (362) includes a mounting portion (368) and an operating portion (369), the mounting portion (368) being connected to the housing (10), the operating portion (369) projecting out of the housing (10).

4. The oxygen sensor according to claim 3, wherein the housing (10) comprises a sleeve (11), an outer cover (13), the sleeve (11) is hollow and comprises a receiving 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 of the sleeve (11) is communicated with the receiving cavity (110), the outer cover (13) comprises a cavity (132), one end of the outer cover (13) is provided with an opening communicated with the cavity (132), one end of the outer cover (13) provided with the opening is abutted against the first end (112) of the sleeve (11), and the mounting hole (102) is provided at the second end (114) of the sleeve (11).

5. The oxygen sensor according to claim 4, 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).

6. The oxygen sensor according to claim 5, wherein the sleeve (11) and the connection ring (15) are relatively movable in the axial direction, so that the width of the gap (118) is adjustable.

7. The oxygen sensor according to claim 4, wherein the light receiving and emitting assembly comprises an excitation light source (32), a reference light source (34), a fluorescence filter (38), an excitation filter (40), a photodetector (42), a front bracket (44), a rear bracket (46) and a circuit board (48), one end of the front bracket (44) is disposed near the inner wall of the second end (114) of the sleeve (11), the rear bracket (46) is disposed between the front bracket (44) and the circuit board (48) and fixedly connected to the front bracket (44) and the circuit board (48) respectively, one end of the circuit board (48) is disposed near the outer cover (13), the excitation light source (32) and the excitation filter (40) are fixed on the front bracket (44), and the fluorescence filter (38) and the reference light source (34) are fixed on the rear bracket (46), the photodetector (42) is fixed to the circuit board (48).

8. The oxygen sensor according to claim 7, wherein an end of the mounting portion (368) remote from the operating portion (369) is further provided with an extension portion (373) that protrudes into the interior of the housing (10); an opening (442) is formed in the front bracket (44), and the extending portion (373) of the supporting member (362) extends into the opening (442) and abuts against the front bracket (44).

9. The oxygen sensor according to claim 7, wherein the outer wall of the front bracket (44) is further provided with a groove (444), a sealing member (445) is arranged at the groove (444), and the sealing member (445) is further contacted with the inner wall of the sleeve (11).

10. A breathing mask, characterized by comprising an oxygen sensor according to any one of claims 1 to 9 and a mask, said mask being connected to said housing (10).

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