Filter device of sensor

Abstract

The utility model discloses a filtering device of a sensor. The filtering device comprises the sensor, a detection bin, a bin door, at least one first filtering piece and at least one second filtering piece, the sensor is arranged in the detection bin, and the bin door detachably covers one side of the detection bin; the first filter part is arranged at the sensing end of the sensor, and the second filter part is detachably arranged on the bin door and is opposite to the first filter part. According to the utility model, the lens in the sensor can be protected, the cleaning difficulty can be reduced, and the sensor is prevented from being polluted.

Description

Technical Field

[0001] This utility model relates to the field of dust detection technology, and in particular to a sensor filtering device. Background Technology

[0002] Currently, passive air intake dust sensors are commonly used in the air purifier industry for air quality detection. However, after long-term use, the lens inside the dust sensor is prone to dust accumulation, which can cause the dust sensor to fail. Therefore, it is necessary to add a filter cotton at the air intake of the dust sensor to filter large particulate pollutants. However, the filter cotton installed in the existing dust sensors should not be removed to avoid dust falling onto the lens surface. After long-term use, the filter cotton will cause contamination of the dust sensor due to its low cleanliness. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a sensor filtering device to reduce cleaning difficulty and prevent dust sensors from being contaminated.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0005] A sensor filtering device includes a detection chamber, a chamber door, at least one first filter element, and at least one second filter element; the sensor is disposed inside the detection chamber, and the chamber door is detachably covered on one side of the detection chamber; the first filter element is disposed at the sensing end of the sensor, and the second filter element is detachably disposed on the chamber door and disposed opposite to the first filter element.

[0006] Furthermore, the first filter element is bonded to the sensor.

[0007] Furthermore, an air inlet is provided on the door.

[0008] Furthermore, a connector is provided on the side of the door facing the sensor; the second filter is detachably connected to the connector, and the second filter is arranged opposite to the air inlet.

[0009] Furthermore, the connector is annular, and the connector and the surface of the compartment door together form a receiving groove; the second filter element is embedded in the receiving groove.

[0010] Furthermore, the connector includes at least two opposing limiting blocks, and all the limiting blocks are equally spaced around the air inlet and together form a limiting space; the second filter is embedded in the limiting space.

[0011] Furthermore, the depth of the receiving groove is greater than or equal to the thickness of the second filter element.

[0012] Furthermore, in the thickness direction of the first filter element, the projection area of ​​the first filter element is located within the projection area of ​​the second filter element.

[0013] Furthermore, the sensing end of the sensor has a detection hole, and the first filter completely covers the detection hole.

[0014] Furthermore, the door is connected to the detection chamber by snap-fit, threaded connection, or magnetic attraction.

[0015] The beneficial effects of this invention are as follows: By installing a second filter element on the door, large particles of impurities are intercepted, extending the service life of the first filter element. This prevents contamination of the lens inside the sensor due to disassembly of the first filter element, thus avoiding any impact on the sensor's sensitivity. Furthermore, since the second filter element is detachably mounted on the door, it can be quickly replaced when it reaches the replacement condition. This ensures protection for both the first filter element and the lens inside the sensor, reduces cleaning difficulty, and prevents sensor contamination. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the filter device of the sensor in this utility model;

[0017] Figure 2 The explosion of the filtering device of the sensor in this utility model Figure 1 ;

[0018] Figure 3 This is a cross-sectional view of the filtering device of the sensor in this utility model;

[0019] Figure 4 The explosion of the filtering device of the sensor in this utility model Figure 2 ;

[0020] Figure 5 The explosion of the filtering device of the sensor in this utility model Figure 3 .

[0021] Label Explanation:

[0022] 1. Sensor; 11. Detection port; 2. Detection chamber; 3. Chamber door; 31. Air inlet; 4. First filter element; 5. Second filter element; 6. Connector; 61. Receiving groove; 62. Limiting block. Detailed Implementation

[0023] To explain in detail the technical content, objectives, and effects of this utility model, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0024] Please refer to Figures 1-5A sensor filtering device includes a detection chamber 2, a chamber door 3, at least one first filter element 4, and at least one second filter element 5; the sensor 1 is disposed inside the detection chamber 2, and the chamber door 3 is detachably covered on one side of the detection chamber 2; the first filter element 4 is disposed at the sensing end of the sensor 1, and the second filter element 5 is detachably disposed on the chamber door 3 and disposed opposite to the first filter element 4.

[0025] Understandably, by installing a second filter element 5 on the door 3, large particles of impurities are intercepted, extending the service life of the first filter element 4. This prevents contamination of the lens inside the sensor 1 due to the removal of the first filter element 4, thus avoiding any impact on the sensitivity of the sensor 1. Furthermore, since the second filter element 5 is detachably mounted on the door 3, it can be quickly replaced when it reaches the replacement condition. This ensures the protection of the first filter element 4 and the lens inside the sensor 1, while also reducing cleaning difficulty and preventing sensor contamination.

[0026] It is worth noting that the sensor 1 used in this invention is a dust sensor; the first filter element 4 and the second filter element 5 used in this invention are made of filter cotton with larger pore sizes to filter large particulate impurities, and should ensure that PM2.5 can pass through the first filter element 4 and the second filter element 5 and be detected by the sensor 1.

[0027] In some embodiments, the first filter element 4 is bonded to the sensor 1. The first filter element 4 is fixedly connected to the sensor 1 by bonding to ensure that the lens of the sensor 1 can be fully protected and to ensure the effectiveness of the sensor 1.

[0028] In some embodiments, the door 3 is provided with an air inlet 31 for communicating the sensor 1 with the external space.

[0029] In some embodiments, a connector 6 is provided on the side of the chamber door 3 facing the sensor 1; the second filter 5 is detachably connected to the connector 6, and the second filter 5 is disposed opposite to the air inlet 31. The connector 6 is provided to limit the second filter 5, so that the second filter 5 can perform preliminary filtration of the air entering the detection chamber 2 from the air inlet 31, ensuring the effectiveness of the second filter 5.

[0030] In some embodiments, the connector 6 is annular, and the connector 6 and the surface of the door 3 together form a receiving groove 61; the second filter element 5 is embedded in the receiving groove 61. Optionally, the second filter element 5 should match the receiving groove 61, that is, the second filter element 5 can be a symmetrical shape such as circular, rectangular, or triangular, or it can be an irregular shape, and the shape of the receiving groove 61 should match the second filter element 5. Preferably, the second filter element 5 is circular. The formation of the receiving groove 61 makes the second filter element 5 subjected to balanced forces in the circumferential direction, enabling the second filter element 5 to be stably connected to the door 3.

[0031] In some embodiments, the depth of the receiving groove 61 is greater than or equal to the thickness of the second filter element 5. When the depth of the receiving groove 61 is equal to the thickness of the second filter element 5, only one second filter element 5 can be accommodated. When the depth of the receiving groove 61 is greater than the thickness of the second filter element 5, multiple second filter elements 5 can be accommodated. That is, the number of second filter elements 5 depends on the depth of the receiving groove 61. To avoid affecting the validity of the detection results of the sensor 1, the number of second filter elements 5 should not be too large, and their thickness should not be too great.

[0032] In some embodiments, the connector 6 includes at least two opposing limiting blocks 62, and all the limiting blocks 62 are equally spaced around the air inlet 31, forming a limiting space; the second filter 5 is embedded in the limiting space. Specifically, when there are two limiting blocks 62, the second filter 5 is preferably rectangular to increase the contact area between the second filter 5 and the limiting blocks 62 and improve the stability of the second filter 5. Furthermore, a groove with a depth equal to or slightly less than the thickness of the second filter 5 can be formed on the side of the limiting block 62 opposite to the other limiting block 62, and the second filter 5 is embedded in the groove, which also enables quick disassembly.

[0033] In some embodiments, in the thickness direction of the first filter element 4, the projection area of ​​the first filter element 4 is located within the projection area of ​​the second filter element 5 to ensure the filtration effect.

[0034] In some embodiments, the sensing end of the sensor 1 has a detection hole 11, and the first filter 4 completely covers the detection hole 11. The detection hole 11 is used for air intake and dust detection of the air entering the sensor 1. The first filter 4 covering the detection hole 11 can fully protect the sensor 1.

[0035] In some embodiments, the door 3 is snap-fitted, threaded, or magnetically connected to the detection chamber 2 to facilitate disassembly of the door 3 and replacement of the second filter element 5.

[0036] Embodiment 1 of this utility model is as follows:

[0037] A sensor filtering device includes a sensor 1, a detection chamber 2, a chamber door 3, a first filter element 4, and a second filter element 5; the sensor 1 is disposed inside the detection chamber 2, and the chamber door 3 is detachably covered on one side of the detection chamber 2; the first filter element 4 is disposed at the sensing end of the sensor, and the second filter element 5 is detachably disposed on the chamber door 3 and disposed opposite to the first filter element 4.

[0038] In this embodiment, the first filter element 4 is bonded to the sensor 1.

[0039] In this embodiment, an air inlet 31 is provided on the door 3, and a connector 6 is provided on the side of the door 3 facing the sensor 1; the second filter 5 is detachably connected to the connector 6, and the second filter 5 is arranged opposite to the air inlet 31.

[0040] In this embodiment, the second filter element 5 is circular, the connector 6 is annular, and the connector 6 and the surface of the door 3 together form a receiving groove 61; the second filter element 5 is embedded in the receiving groove 61.

[0041] In this embodiment, the depth of the receiving groove 61 is equal to the thickness of the second filter element 5.

[0042] In this embodiment, in the thickness direction of the first filter element 4, the projection area of ​​the first filter element 4 is located within the projection area of ​​the second filter element 5.

[0043] In this embodiment, the door 3 is engaged with the detection chamber 2.

[0044] The working principle of this utility model is as follows:

[0045] Air passes through the second filter element 5 and the first filter element 4 in sequence before entering the sensor 1 through the detection hole 11 for dust detection.

[0046] In summary, the sensor filtering device provided by this utility model, by adding a second filter element and connecting the second filter element with an openable and closable door, facilitates the replacement of the second filter element, extends the service life of the first filter element, and thus avoids sensor contamination and ensures the effectiveness of the sensor.

[0047] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent modifications made based on the content of this utility model specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A filtering device for a sensor, characterized in that, The sensor detection bin, the bin door, at least one first filter and at least one second filter are included. The sensor is arranged in the detection bin, and the bin door is detachably arranged on one side of the detection bin. The first filter is arranged at the sensing end of the sensor, and the second filter is detachably arranged on the bin door and arranged opposite to the first filter.

2. A filtering device for a sensor according to claim 1, characterized in that The first filter is bonded with the sensor.

3. The filtering device of a sensor according to claim 1, wherein, An air inlet hole is arranged on the bin door.

4. A filter device for a sensor according to claim 3, characterized in that A connecting piece is arranged on the side of the bin door facing the sensor. The second filter is detachably connected with the connecting piece, and the second filter is arranged opposite to the air inlet hole.

5. A filter device for a sensor according to claim 4, characterised in that The connecting piece is annular, and the connecting piece and the surface of the bin door enclose a containing groove. The second filter is embedded in the containing groove.

6. A filter device for a sensor according to claim 4, characterized in that The connecting piece includes at least two oppositely arranged limiting blocks, and all the limiting blocks are arranged at equal intervals around the air inlet hole and enclose a limiting space. The second filter is embedded in the limiting space.

7. A filter device for a sensor according to claim 5, characterized in that The depth of the containing groove is greater than or equal to the thickness of the second filter.

8. The filtering device of a sensor according to claim 1, wherein, In the thickness direction of the first filter, the projection area of the first filter is located in the projection area of the second filter.

9. The filtering device of a sensor according to claim 1, wherein, The sensing end of the sensor has a detection hole, and the first filter completely covers the detection hole.

10. The filtering device of a sensor according to claim 1, wherein, The bin door is connected with the detection bin through clamping, screwing or magnetic attraction.

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