Air particulate matter sensor

Abstract

The utility model relates to the field of sensors, in particular to an air particulate matter sensor which solves the problem that a filter screen is inconvenient to clean and replace and comprises a sensor body, an air inlet is formed in the sensor body, a kidney-shaped ring is installed in the air inlet, the filter screen is arranged in the air inlet, the filter screen is attached to the kidney-shaped ring, and the kidney-shaped ring is arranged in the sensor body. A kidney-shaped ring is arranged on the sensor body, an ejection assembly is arranged on the kidney-shaped ring, a limiting assembly used for limiting the filter screen is arranged on the sensor body, and the limiting assembly comprises a U-shaped frame installed on the sensor body. According to the utility model, through the matching among the waist-shaped ring, the ejection assembly and the limiting assembly, the filter screen can be quickly pressed in the air inlet when being mounted, and can be ejected out of the air inlet when being dismounted, so that the filter screen is convenient to dismount and mount, and the working efficiency is improved. And the cleaning and replacing efficiency of the filter screen can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sensors, in particular to an air particle sensor. Background Art

[0002] Air particle sensor, also known as PM sensor, is a device used to measure and monitor particulate matter in the air (such as dust, smoke, pollutants, etc.). It is widely used in air quality monitoring, environmental monitoring, industrial process control and other fields.

[0003] Existing air particle sensors mainly rely on fans to draw gases from the environment into the air chamber. The light source emits a light beam into the air chamber. The particles in the air chamber are scattered after being irradiated by the light. At this time, the photoelectric detector collects the scattered light through a concave reflector, completes the photoelectric signal conversion, and then processes the converted electrical signal to calculate the PM2.5 concentration value. In order to prevent mosquitoes and impurities in the environment from being sucked into the air chamber, a filter needs to be installed at the air inlet of the air particle sensor. However, the filter will be contaminated with impurities after long-term use, affecting the air intake effect. Therefore, the filter needs to be cleaned and replaced regularly. The existing air particle sensor is more troublesome to disassemble the filter, which will greatly affect the cleaning and replacement efficiency of the filter.

[0004] Therefore, the utility model provides an air particle sensor to solve the above problems. Utility Model Content

[0005] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides an air particle sensor to solve the above problem that it is inconvenient to clean and replace the filter.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] An air particle sensor comprises a sensor body, wherein the sensor body is provided with an air inlet, a waist-shaped ring is installed inside the air inlet, a filter is arranged inside the air inlet, and the filter is fitted with the waist-shaped ring, an ejection assembly is arranged on the waist-shaped ring, and a limiting assembly for limiting the filter is arranged on the sensor body, the limiting assembly comprises a U-shaped frame installed on the sensor body, two symmetrical connecting rods are slidably connected inside the U-shaped frame, and pressure rings are fixedly connected to the ends of the two connecting rods close to each other, and the two pressure rings press the filter tightly.

[0008] Preferably, the ejection assembly includes a first cylinder, which is fixedly connected to a side of the waist-shaped ring away from the filter screen, and a push rod is slidably connected inside the first cylinder, and one end of the push rod away from the first cylinder passes through the waist-shaped ring and contacts the filter screen.

[0009] Preferably, one end of the push rod away from the filter screen is fixedly connected to a first spring, and one end of the first spring away from the push rod is fixedly connected to the first cylinder.

[0010] Preferably, the outer surface of the U-shaped frame is fixedly connected to two symmetrical second cylinders, the ends of the two connecting rods away from each other are respectively inserted into the inside of the two second cylinders, the ends of the two connecting rods away from each other are fixedly connected to second springs, and the ends of the two second springs away from the two connecting rods are respectively fixedly connected to the two second cylinders.

[0011] Preferably, the tops of the two pressure rings are fixedly connected with vertical rods, the interior of the U-shaped frame is provided with a slide groove adapted to the vertical rod, and the ends of the two vertical rods away from the pressure rings are slidably connected inside the slide groove.

[0012] Preferably, outer surfaces of the two vertical rods are fixedly connected to a cross rod, and grooves for accommodating fingers are formed on the two cross rods.

[0013] The beneficial effects of the utility model are:

[0014] 1. The utility model cooperates with the waist ring, the ejection assembly and the limit assembly, so that when the filter is installed, it can be quickly pressed inside the air inlet, and when the filter is disassembled, the filter can be popped out from the inside of the air inlet, so that the filter can be easily disassembled and assembled, thereby effectively improving the cleaning and replacement efficiency of the filter.

[0015] 2. The utility model can facilitate single-handed control of the two pressure rings to move away from the filter screen at the same time through the cooperation between the vertical rod and the horizontal rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0017] Figure 2 It is a schematic diagram of the connection between the air inlet and the waist-shaped ring of the utility model.

[0018] Figure 3 It is a three-dimensional structural schematic diagram of the waist-shaped ring, filter screen, ejection assembly and limit assembly of the utility model.

[0019] Figure 4 It is a schematic diagram of the connection between the first spring and the push rod of the utility model.

[0020] Figure 5 It is a connection schematic diagram of the connecting rod and the second spring of the utility model.

[0021] In the figure: 1. sensor body; 2. air inlet; 3. waist-shaped ring; 4. filter; 5. ejector assembly; 501. first cylinder; 502. first spring; 503. ejector rod; 6. limit assembly; 601. U-shaped frame; 602. second cylinder; 603. connecting rod; 604. pressure ring; 605. second spring; 606. vertical rod; 607. horizontal rod. DETAILED DESCRIPTION

[0022] The following will refer to the attached Figures 1 to 5 The embodiments of the present invention are described in detail. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principle of the present invention and are not intended to limit the protection scope of the present invention.

[0023] An air particle sensor, such as the one Figure 1-5 As shown, the sensor body 1 includes an air inlet 2, a waist-shaped ring 3 is installed inside the air inlet 2, a filter 4 is arranged inside the air inlet 2, and the filter 4 is fitted with the waist-shaped ring 3; by setting the filter 4, when the gas in the environment is sucked into the air chamber, mosquitoes and impurities in the environment can be prevented from being sucked into the air chamber.

[0024] An ejection assembly 5 is provided on the waist-shaped ring 3, and the ejection assembly 5 includes a first cylinder 501. The first cylinder 501 is fixedly connected to the side of the waist-shaped ring 3 away from the filter 4. A push rod 503 is slidably connected inside the first cylinder 501. The end of the push rod 503 away from the first cylinder 501 passes through the waist-shaped ring 3 and contacts the filter 4. A first through hole adapted to the push rod 503 is opened inside the waist-shaped ring 3.

[0025] One end of the push rod 503 away from the filter 4 is fixedly connected to the first spring 502, and one end of the first spring 502 away from the push rod 503 is fixedly connected to the first cylinder 501; when the filter 4 is placed into the air inlet 2 and fits with the waist-shaped ring 3, the push rod 503 can be driven to slide into the inside of the first cylinder 501 and compress the first spring 502.

[0026] The sensor body 1 is provided with a limit assembly 6 for limiting the filter 4. The limit assembly 6 includes a U-shaped frame 601 installed on the sensor body 1. Two symmetrical connecting rods 603 are slidably connected inside the U-shaped frame 601. The ends of the two connecting rods 603 close to each other are fixedly connected with pressure rings 604. The two pressure rings 604 both press the filter 4. A second through hole adapted to the connecting rod 603 is opened inside the U-shaped frame 601.

[0027] The outer surface of the U-shaped frame 601 is fixedly connected to two symmetrical second cylinders 602, and the ends of the two connecting rods 603 that are away from each other are respectively inserted into the inside of the two second cylinders 602, and the ends of the two connecting rods 603 that are away from each other are fixedly connected to the second springs 605, and the ends of the two second springs 605 that are away from the two connecting rods 603 are respectively fixedly connected to the two second cylinders 602; when the pressure ring 604 moves in the direction away from the filter screen 4, it will drive the connecting rod 603 to slide toward the inside of the second cylinder 602 and compress the second spring 605.

[0028] The tops of the two pressure rings 604 are fixedly connected with vertical rods 606, and the interior of the U-shaped frame 601 is provided with sliding grooves adapted to the vertical rods 606. The ends of the two vertical rods 606 away from the pressure rings 604 are slidably connected to the interior of the sliding grooves. The outer surfaces of the two vertical rods 606 are fixedly connected with cross rods 607, and the two cross rods 607 are provided with grooves for accommodating fingers. Through the cooperation between the vertical rods 606 and the cross rods 607, the two pressure rings 604 can be easily controlled by one hand to move simultaneously in the direction away from the filter 4.

[0029] Working principle: When installing the filter 4, first push the two cross bars 607 to both sides with one hand. The two cross bars 607 can drive the two pressure rings 604 to move to both sides and compress the two second springs 605. Then, insert the filter 4 into the interior of the air inlet 2 and make the filter 4 close to the waist-shaped ring 3. During the process of the filter 4 close to the waist-shaped ring 3, the push rod 503 can be driven to slide toward the inside of the first cylinder 501 and compress the first spring 502. Then, release the two cross bars 607. Under the action of the two second springs 605, the two pressure rings 604 will move toward the direction of the filter 4, thereby pressing the filter 4. At this time, the installation of the filter 4 is completed. When the filter 4 needs to be disassembled, only one hand is needed to push the two cross bars 607 to both sides to release the limit of the filter 4. Then, under the action of the first spring 502, the push rod 503 can push the filter 4 out from the inside of the air inlet 2, and then the filter 4 can be removed for cleaning.

[0030] It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0031] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0032] So far, the technical solution of the present invention has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. An air particle sensor, comprising a sensor body (1), characterized in that: The sensor body (1) is provided with an air inlet (2), a waist-shaped ring (3) is installed inside the air inlet (2), a filter (4) is arranged inside the air inlet (2), and the filter (4) is fitted with the waist-shaped ring (3), an ejection assembly (5) is arranged on the waist-shaped ring (3), and a limiting assembly (6) for limiting the filter (4) is arranged on the sensor body (1), and the limiting assembly (6) includes a U-shaped frame (601) installed on the sensor body (1), and two symmetrical connecting rods (603) are slidably connected inside the U-shaped frame (601), and the ends of the two connecting rods (603) close to each other are fixedly connected with a pressure ring (604), and the two pressure rings (604) both press the filter (4).

2. An air particle sensor according to claim 1, characterized in that: The ejection assembly (5) comprises a first cylinder (501), the first cylinder (501) being fixedly connected to a side of the waist-shaped ring (3) away from the filter screen (4), a push rod (503) being slidably connected inside the first cylinder (501), and an end of the push rod (503) away from the first cylinder (501) passing through the waist-shaped ring (3) and contacting the filter screen (4).

3. The air particle sensor according to claim 2, characterized in that: One end of the push rod (503) away from the filter screen (4) is fixedly connected to a first spring (502), and one end of the first spring (502) away from the push rod (503) is fixedly connected to the first cylinder (501).

4. The air particle sensor according to claim 1, characterized in that: The outer surface of the U-shaped frame (601) is fixedly connected to two symmetrical second cylinders (602); the ends of the two connecting rods (603) that are away from each other are respectively inserted into the inside of the two second cylinders (602); the ends of the two connecting rods (603) that are away from each other are fixedly connected to second springs (605); and the ends of the two second springs (605) that are away from the two connecting rods (603) are respectively fixedly connected to the two second cylinders (602).

5. The air particle sensor according to claim 1, characterized in that: The tops of the two pressure rings (604) are fixedly connected with vertical rods (606), and the interior of the U-shaped frame (601) is provided with a sliding groove adapted to the vertical rod (606), and the ends of the two vertical rods (606) away from the pressure ring (604) are slidably connected inside the sliding groove.

6. The air particle sensor according to claim 5, characterized in that: The outer surfaces of the two vertical rods (606) are fixedly connected to a cross rod (607), and the two cross rods (607) are provided with grooves for accommodating fingers.

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