Oxygen concentration sensor assembly

Abstract

The utility model relates to the technical field of gas sensors, in particular to an oxygen concentration sensor assembly which comprises an oxygen concentration sensor, a one-way valve plate and a first shell, the oxygen concentration sensor is provided with a detection end, and a detection cavity is formed in the first shell; a detection cavity is formed in the first shell, an air inlet, an air outlet and a matching opening which are all communicated with the detection cavity are formed in the first shell, the detection end is matched with the matching opening in a sealing mode, and the one-way valve plate is installed at the air outlet and used for preventing air outside the detection cavity from entering the detection cavity from the air outlet. The utility model aims to provide the oxygen concentration sensor assembly aiming at at least one technical problem related in the background technology.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gas sensor, in particular to an oxygen concentration sensor assembly. BACKGROUND

[0002] The oxygen concentration sensor is a device for measuring the concentration of oxygen. It plays a key role in many fields, such as automobiles, industries, medical care and environment, etc. When the oxygen concentration sensor is applied, the detection data may be unstable due to the change of oxygen flow in the equipment, which adversely affects the application of the equipment. CONTENT OF THE UTILITY MODEL

[0003] The present application aims to provide an oxygen concentration sensor assembly to solve at least one technical problem in the background art.

[0004] In order to achieve the above-mentioned purpose, the present application adopts the following technical solution:

[0005] The present application provides an oxygen concentration sensor assembly, which comprises an oxygen concentration sensor, a one-way valve sheet and a first shell. The oxygen concentration sensor has a detection end. A detection cavity is formed in the first shell. An air inlet, an air outlet and a matching port are formed on the first shell and communicate with the detection cavity. The detection end is in sealing cooperation with the matching port. The one-way valve sheet is installed on the air outlet. The one-way valve sheet is used to prevent the gas outside the detection cavity from entering the detection cavity through the air outlet.

[0006] Optionally, a plurality of air outlets are formed on the first shell. A valve sheet mounting portion is formed on the first shell. The one-way valve sheet is installed on the valve sheet mounting portion. Each air outlet is formed on the valve sheet mounting portion.

[0007] Optionally, the oxygen concentration sensor assembly provided by the present application comprises a plurality of one-way valve sheets. A plurality of air outlets are formed on the first shell. Each one-way valve sheet is installed in one-to-one correspondence with each air outlet.

[0008] The technical solution has the beneficial effects that when the gas flow changes, the positions of the one-way valve sheets at the plurality of air outlets change simultaneously, thereby the pressure in the detection cavity can be stabilized more quickly according to the change of the gas flow, and the adverse effects of the change of the gas flow on the stability of the measurement data of the oxygen concentration sensor are further reduced.

[0009] Optionally, the oxygen concentration sensor assembly provided by the present application further comprises a second shell. The first shell comprises a first sleeve portion. The matching port communicates with the first sleeve portion. The first sleeve portion is sleeved outside the oxygen concentration sensor. The second shell comprises a second sleeve portion. The second sleeve portion is sleeved outside the first sleeve portion.

[0010] The beneficial effects of the technical solution are that the oxygen concentration sensor can be wrapped in the first sleeve part of the first shell and the second sleeve part of the second shell, so as to achieve the purpose of protecting the oxygen concentration sensor.

[0011] Optionally, the first shell and the second shell are detachably connected to detachably fix the oxygen concentration sensor between the first shell and the second shell.

[0012] The beneficial effects of the technical solution are that the first shell, the second shell and / or the oxygen concentration sensor can be easily disassembled and assembled when they are damaged and need to be replaced or repaired, and the convenience of using the oxygen concentration sensor assembly is improved.

[0013] Optionally, an outer thread is arranged on the outer wall of the first sleeve part, an inner thread is arranged on the inner wall of the second sleeve part, and the first sleeve part is threadedly connected with the second sleeve part.

[0014] The beneficial effects of the technical solution are that the convenience of disassembling and assembling the first shell and the second shell is further improved.

[0015] Optionally, the oxygen concentration sensor assembly provided in the application further comprises a tensioning member, a limiting part is formed on the inner wall of the second sleeve part, the limiting part protrudes from the inner wall of the second sleeve part in the axial direction of the second sleeve part, the tensioning member is located in the second sleeve part, one end of the tensioning member abuts against the end part of the first sleeve part in the axial direction of the second sleeve part, and the other end of the tensioning member abuts against the limiting part.

[0016] The beneficial effects of the technical solution are that when the first sleeve part is threadedly connected with the second sleeve part, the tensioning member in the first sleeve part and the second sleeve part abuts against each other, limiting the first sleeve part and the second sleeve part, so that the thread connection between the first sleeve part and the second sleeve part is not easy to fail.

[0017] Optionally, the tensioning member is a tensioning spring, the tensioning spring is sleeved outside the oxygen concentration sensor, one end of the tensioning spring abuts against the end part of the first sleeve part in the axial direction of the second sleeve part, and the other end of the tensioning spring abuts against the limiting part.

[0018] The beneficial effects of the technical solution are that the tensioning spring is convenient for assembling the oxygen concentration sensor assembly, the tensioning spring can be limited only by placing it on the limiting part, and then the first sleeve part and the second sleeve part can be threadedly connected.

[0019] Optionally, a stepped part is formed on the outer wall of the oxygen concentration sensor, and the stepped part abuts against the limiting part in the axial direction of the second sleeve part.

[0020] The beneficial effects of the technical solution are that the abutment between the step portion and the limiting portion achieves relatively firm limiting of the oxygen concentration sensor in the axial direction of the second sleeve portion.

[0021] Optionally, a wire passing hole is formed on the second housing, the wire passing hole is coaxially arranged with the second sleeve portion, and the wire passing hole is located at an end of the second housing away from the first housing.

[0022] The beneficial effects of the technical solution are that the wire passing hole is coaxially arranged with the second sleeve portion, and the wire passing hole is located at an end of the second housing away from the first housing.

[0023] Optionally, the oxygen concentration sensor assembly provided in the application further comprises a sensor adapter plate, an adapter plate clamping groove is formed on the inner wall of the second sleeve portion, the sensor adapter plate is located in the second sleeve portion, and the sensor adapter plate is clamped with the adapter plate clamping groove.

[0024] The beneficial effects of the technical solution are that the sensor adapter plate can be fixed in the second sleeve portion, and the second sleeve portion protects the sensor adapter plate.

[0025] The technical solution provided in the application can achieve at least one of the following beneficial effects:

[0026] In use of the oxygen concentration sensor assembly provided in the application, the gas inlet is used to introduce gas into the detection cavity, the one-way valve plate partially opens the gas outlet, the gas in the detection cavity is sent out from the gas outlet, the detection end detects the oxygen concentration in the detection cavity through the cooperation opening, if the gas flow into the detection cavity suddenly decreases, the gas flow out of the gas outlet decreases, the one-way valve plate moves, the opening area of the gas outlet decreases, and the gas pressure in the detection cavity is kept stable; if the gas flow into the detection cavity suddenly increases, the gas flow out of the gas outlet increases, the one-way valve plate moves, the opening area of the gas outlet increases, and the gas pressure in the detection cavity is kept stable. Thus, even if the gas flow changes, the influence on the gas pressure in the detection cavity is relatively small, and the adverse effects of the change of the gas flow on the stability of the measurement data of the oxygen concentration sensor are reduced.

[0027] The additional technical features of the application and their advantages will be more apparent in the following description or can be understood through the specific implementation of the application. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the specific embodiments of the present application, the drawings needed to be used in the specific embodiments description will be briefly introduced. Obviously, the drawings described below are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0029] Fig. 1 A perspective structural schematic view of an embodiment of the oxygen concentration sensor assembly provided by the present application;

[0030] Fig. 2 A perspective structural schematic view of an embodiment of the oxygen concentration sensor assembly provided by the present application;

[0031] Fig. 3 A perspective structural schematic view of an embodiment of the oxygen concentration sensor assembly provided by the present application;

[0032] Reference signs:

[0033] 01, second housing; 02, first housing;

[0034] 03, air inlet; 04, one-way valve plate;

[0035] 05, sensor support; 06, air outlet;

[0036] 07, valve plate mounting portion; 08, detection cavity;

[0037] 09, detection end; 10, oxygen concentration sensor;

[0038] 11, second sleeve portion; 12, sensor adapter plate;

[0039] 13, adapter plate clamping groove; 14, wire passing hole;

[0040] 15, step portion; 16, limiting portion;

[0041] 17, tension spring; 18, matching port;

[0042] 19, first sleeve portion. Specific embodiments

[0043] The technical solutions of the present application will be described below in conjunction with the drawings. Obviously, the described embodiments are some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0044] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0045] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0046] As shown in Figs. 1 to 3 The present application provides an oxygen concentration sensor assembly, which comprises an oxygen concentration sensor 10, a one-way valve sheet 04 and a first housing 02, the oxygen concentration sensor 10 has a detection end 09, a detection cavity 08 is formed in the first housing 02, an air inlet 03, an air outlet 06 and a matching port 18 are formed on the first housing 02, the detection end 09 is sealingly matched with the matching port 18, the one-way valve sheet 04 is installed on the air outlet 06, and the one-way valve sheet 04 is used to prevent gas outside the detection cavity 08 from entering the detection cavity 08 from the air outlet 06.

[0047] The oxygen concentration sensor assembly provided by the present application, when in use, gas is introduced into the detection cavity 08 through the air inlet 03, the one-way valve sheet 04 partially opens the air outlet 06, the gas in the detection cavity 08 is sent out from the air outlet 06, the detection end 09 detects the oxygen concentration in the detection cavity 08 through the matching port 18, if the gas flow into the detection cavity 08 suddenly decreases, the gas flow from the air outlet 06 decreases, the one-way valve sheet 04 moves, the area of the air outlet 06 opening is reduced, and the gas pressure in the detection cavity 08 is kept stable; if the gas flow into the detection cavity 08 suddenly increases, the gas flow from the air outlet 06 increases, the one-way valve sheet 04 moves, the area of the air outlet 06 opening is increased, and the gas pressure in the detection cavity 08 is kept stable. In this way, even if the gas flow changes, the influence on the gas pressure in the detection cavity 08 is relatively small, and the adverse effects of the change of the gas flow on the measurement data stability of the oxygen concentration sensor 10 are reduced.

[0048] In one or more embodiments of the present application, a plurality of air outlets 06 are formed on the first shell 02, and a valve plate mounting portion 07 is formed on the first shell 02, and the one-way valve plate 04 is mounted on the valve plate mounting portion 07, and each of the air outlets 06 is formed on the valve plate mounting portion 07.

[0049] In one or more embodiments of the present application, the oxygen concentration sensor assembly provided by the embodiments of the present application includes a plurality of one-way valve plates 04, and a plurality of air outlets 06 are formed on the first shell 02, and each of the one-way valve plates 04 is correspondingly mounted on each of the air outlets 06. In this way, when the gas flow changes, the position of each one-way valve plate 04 at the plurality of air outlets 06 changes at the same time, and the pressure in the detection cavity 08 can be more quickly and stably detected according to the change in the gas flow, and the adverse effects of the change in the gas flow on the measurement data stability of the oxygen concentration sensor 10 are further reduced. In the embodiments of the present application, the number of one-way valve plates 04 and the number of air outlets 06 are preferably at least two. Of course, the number of one-way valve plates 04 and the number of air outlets 06 can be only one.

[0050] Optionally, the oxygen concentration sensor assembly provided by the embodiments of the present application further includes a second shell, the first shell 02 includes a first sleeve portion 19, the fitting port 18 communicates with the first sleeve portion 19, and the first sleeve portion 19 is sleeved outside the oxygen concentration sensor 10, and the second shell 01 includes a second sleeve portion 11, and the second sleeve portion 11 is sleeved outside the first sleeve portion 19. In this way, the oxygen concentration sensor 10 can be wrapped inside the first sleeve portion 19 of the first shell 02 and the second sleeve portion 11 of the second shell 01, so as to achieve the purpose of protecting the oxygen concentration sensor 10.

[0051] Optionally, the first shell 02 and the second shell 01 are detachably connected to detachably fix the oxygen concentration sensor 10 between the first shell 02 and the second shell 01. In this way, when the first shell 02, the second shell 01 and / or the oxygen concentration sensor 10 are damaged and need to be replaced or repaired, the first shell 02, the second shell 01 and / or the oxygen concentration sensor 10 can be easily disassembled and assembled, and the convenience of using the oxygen concentration sensor assembly is improved. Of course, the first shell 02, the second shell 01 and the oxygen concentration sensor 10 can be fixedly connected.

[0052] Optionally, an external thread is arranged on the outer wall of the first sleeve portion 19, an internal thread is arranged on the inner wall of the second sleeve portion 11, and the first sleeve portion 19 is threadedly connected with the second sleeve portion 11. This further improves the convenience of disassembling and assembling the first shell 02 and the second shell 01. Of course, the first sleeve portion 19 and the second sleeve portion 11 can also be clamped.

[0053] Optionally, the oxygen concentration sensor assembly provided by the embodiment of the present application further comprises a tensioning member, a limiting portion 16 is formed on the inner wall of the second sleeve portion 11, the limiting portion 16 protrudes from the inner wall of the second sleeve portion 11 in the axial direction of the second sleeve portion 11, the tensioning member is located in the second sleeve portion 11, one end of the tensioning member abuts against the end portion of the first sleeve portion 19 in the axial direction of the second sleeve portion 11, and the other end of the tensioning member abuts against the limiting portion 16. In this way, after the first sleeve portion 19 is threadedly connected with the second sleeve portion 11, the first sleeve portion 19 abuts against the tensioning member in the second sleeve portion 11, thereby limiting the first sleeve portion 19 and the second sleeve portion 11, and further preventing the thread connection between the first sleeve portion 19 and the second sleeve portion 11 from being damaged.

[0054] Optionally, the tensioning member is a tensioning spring 17, the tensioning spring 17 is sleeved outside the oxygen concentration sensor 10, one end of the tensioning spring 17 abuts against the end portion of the first sleeve portion 19 in the axial direction of the second sleeve portion 11, and the other end of the tensioning spring 17 abuts against the limiting portion 16. The tensioning spring 17 facilitates the assembly of the oxygen concentration sensor assembly, and the tensioning spring 17 can be limited only by being placed on the limiting portion 16, and then the first sleeve portion 19 is threadedly connected with the second sleeve portion 11. Of course, the tensioning member can also be a Z-shaped spring or other elastic member.

[0055] Optionally, a stepped portion 15 is formed on the outer wall of the oxygen concentration sensor 10, and the stepped portion 15 abuts against the limiting portion 16 in the axial direction of the second sleeve portion 11. In this way, the abutment between the stepped portion 15 and the limiting portion 16 achieves relatively firm limiting of the oxygen concentration sensor 10 in the axial direction of the second sleeve portion 11.

[0056] Optionally, a wire passing hole 14 is formed on the second housing 01, the wire passing hole 14 is coaxially arranged with the second sleeve portion 11, and the wire passing hole 14 is located at the end of the second housing 01 away from the first housing 02. In this way, the data line can be connected with the oxygen concentration sensor 10 in the second housing 01. Of course, the wire passing hole 14 can also be located in the radial direction of the second sleeve portion 11.

[0057] Optionally, the oxygen concentration sensor assembly provided by the embodiment of the present application further comprises a sensor adapter plate 12, an adapter plate clamping groove 13 is formed on the inner wall of the second sleeve portion 11, the sensor adapter plate 12 is located in the second sleeve portion 11, and the sensor adapter plate 12 is clamped with the adapter plate clamping groove 13. In this way, the sensor adapter plate 12 can be fixed in the second sleeve portion 11, and the second sleeve portion 11 protects the sensor adapter plate 12.

[0058] The oxygen concentration sensor assembly provided by the embodiments of the present application preferably further comprises a sensor support 05, the second shell 01 is fixed to the sensor support 05, and the oxygen concentration sensor assembly is fixedly connected with external equipment through the sensor support 05.

[0059] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An oxygen concentration sensor assembly characterized by, The oxygen concentration sensor, the one-way valve sheet and the first shell are provided, the oxygen concentration sensor has a detection end, a detection cavity is formed in the first shell, an air inlet, an air outlet and a matching port which are communicated with the detection cavity are formed on the first shell, the detection end is sealingly matched with the matching port, the one-way valve sheet is installed on the air outlet, and the one-way valve sheet is used for preventing gas outside the detection cavity from entering the detection cavity through the air outlet.

2. The oxygen concentration sensor assembly according to claim 1, wherein A plurality of air outlets are formed on the first shell, and a valve sheet mounting portion is formed on the first shell, the one-way valve sheet is installed on the valve sheet mounting portion, and each air outlet is formed on the valve sheet mounting portion.

3. The oxygen concentration sensor assembly of claim 1, wherein, The one-way valve sheet is installed on each air outlet.

4. The oxygen concentration sensor assembly of claim 1, wherein, The second shell is further provided, the first shell comprises a first sleeve portion, the matching port is communicated with the first sleeve portion, the first sleeve portion is sleeved outside the oxygen concentration sensor, and the second shell comprises a second sleeve portion, the second sleeve portion is sleeved outside the first sleeve portion.

5. The oxygen concentration sensor assembly of claim 4, wherein, The first shell and the second shell are detachably connected to detachably fix the oxygen concentration sensor between the first shell and the second shell.

6. The oxygen concentration sensor assembly of claim 5, wherein, An external thread is arranged on an outer wall of the first sleeve portion, an internal thread is arranged on an inner wall of the second sleeve portion, and the first sleeve portion is threadedly connected with the second sleeve portion.

7. The oxygen concentration sensor assembly of claim 4, wherein, A limiting portion is formed on the inner wall of the second sleeve portion, the limiting portion protrudes from the inner wall of the second sleeve portion in the axial direction of the second sleeve portion, the tensioning member is located in the second sleeve portion, one end of the tensioning member is in abutment with the end portion of the first sleeve portion in the axial direction of the second sleeve portion, and the other end of the tensioning member is in abutment with the limiting portion.

8. The oxygen concentration sensor assembly of claim 7, wherein, The tensioning member is a tensioning spring, the tensioning spring is sleeved outside the oxygen concentration sensor, one end of the tensioning spring is in abutment with the end portion of the first sleeve portion in the axial direction of the second sleeve portion, and the other end of the tensioning spring is in abutment with the limiting portion.

9. The oxygen concentration sensor assembly of claim 8, wherein, A stepped portion is formed on the outer wall of the oxygen concentration sensor, and the stepped portion is in abutment with the limiting portion in the axial direction of the second sleeve portion.

10. An oxygen concentration sensor assembly according to any one of claims 4 to 9, wherein, A wire passing hole is formed on the second shell, the wire passing hole is coaxially arranged with the second sleeve portion, and the wire passing hole is located at one end of the second shell away from the first shell.

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