An air quality detector

Abstract

The utility model provides an air quality detector, including main casing and the top cover of being connected in the top of main casing, be equipped with a plurality of independent chambers for installing sensor in main casing, and the part of main casing is directly opposite sensor is evenly distributed with a plurality of air inlet hole, be equipped with a plurality of interval setting ridge between top cover and main casing to make the clearance between the periphery of top cover and main casing form the flow guide groove. The utility model discloses a flow guide groove is arranged in the periphery of top cover, and the air inlet hole is used for air inlet in the position of corresponding sensor in lower part, not only makes the air even flow, avoids the airflow dead angle and retention, improves the response time and measurement accuracy of sensor, also ensures internal gas flow unobstructed, reduces the internal and external pressure difference, promotes the detection accuracy, through setting up independent detection chamber, different sensor module is isolated, and each sensor is equipped with independent detection chamber, prevents the cross interference between sensor, ensures each sensor independent work, improves the independence and reliability of measurement data.

Description

Technical Field

[0001] This utility model relates to the field of gas detection technology, and in particular to an air quality detector. Background Technology

[0002] With rapid economic development and improved living standards, people have increasingly higher requirements for their living environment. Indoor air quality directly affects people's health and quality of life. Effective air quality monitoring is crucial for air pollution control and environmental health management, helping people understand the status of indoor environmental pollution and take timely measures to reduce pollution.

[0003] However, existing air quality monitoring instruments generally face the following problems: 1. Sensor cross-interference: Multiple sensors in the same space are prone to mutual interference, leading to inaccurate measurements. 2. Slow response time: In traditional designs, poor airflow and gas exchange result in long sensor response times. 3. Insufficient accuracy: Non-uniform gas flow and unreasonable sensor settings may lead to accuracy errors. Therefore, designing an air quality monitoring instrument with independent isolation of multiple sensors and optimized airflow channels is of significant research importance.

[0004] Chinese utility model patent CN205002797 U, published on January 27, 2016, discloses an air quality detection device, comprising: a top cover with an air inlet and an air outlet; a fixing base for fixing the air quality detection device; and a support base sandwiched between the top cover and the fixing base, on which are mounted: multiple sensors for detecting formaldehyde content, particulate matter concentration, carbon dioxide concentration, and one or more of temperature and humidity in the air; a controller module including a controller electrically connected to the multiple sensors and receiving and processing data signals output by the multiple sensors; and a communication module electrically connected to the controller module for wirelessly transmitting data output by the controller module to a server or external device. However, the multiple sensors in this patent are prone to mutual interference in the same space; and the non-uniformity of gas flow can lead to accuracy errors. Summary of the Invention

[0005] To address the aforementioned technical problems, this utility model proposes an air quality detector to solve the problem that uneven gas flow in existing air quality detection equipment can easily lead to accuracy errors.

[0006] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0007] An air quality detector includes a housing and a top cover connected to the top of the main housing. The main housing contains several independent chambers for mounting sensors, and multiple air inlets are evenly distributed on the main housing facing the sensors. Several spaced-apart protrusions are provided between the top cover and the main housing to create gaps around the top cover, forming flow channels. This invention, by providing flow channels around the top cover and honeycomb-shaped air inlets at the lower part corresponding to the detection port of each sensor, not only ensures uniform airflow, avoids dead zones and stagnation, and improves sensor response time and measurement accuracy, but also ensures smooth internal gas flow, reduces internal and external pressure differences, and improves detection accuracy. By setting independent detection chambers, different sensor modules are isolated, with each sensor equipped with an independent detection chamber, preventing cross-interference between sensors, ensuring independent operation of each sensor, and improving the independence and reliability of measurement data.

[0008] Furthermore, in order to facilitate the assembly of internal components and improve the appearance, the main housing includes an inner cylinder, a base located at the bottom of the inner cylinder, and an outer cylinder covering the outside of the inner cylinder; the inner cylinder, outer cylinder, and base are detachably connected, and the top of the outer cylinder is snapped into the top cover.

[0009] Furthermore, in order to facilitate uniform air intake for sensors at various locations, the outer contours of the cross-sections of both the inner and outer cylinders are rectangular, and the outer cylinder has a concave arc-shaped waistline in the middle.

[0010] Furthermore, the lower side of the top cover is provided with several snap-fit ​​blocks, and the top of the outer cylinder is provided with a top snap-fit ​​groove that cooperates with the snap-fit ​​blocks; the top cover is provided with several outwardly extending protrusions around its perimeter, and the top of the outer cylinder is provided with a top groove that cooperates with the end of the protrusions.

[0011] Furthermore, the lower sides of the inner cylinder are provided with detection ports that communicate with independent chambers; the corresponding positions on the lower part of the outer cylinder are provided with the aforementioned air inlet.

[0012] Furthermore, to enhance aesthetics and ensure the display device is functioning properly, the inner cylinder has recessed grooves on its other two sides, with LED strips installed within these grooves, and corresponding light-transmitting holes on the outer cylinder.

[0013] Furthermore, a detection main board is clamped between the bottom of the inner cylinder and the base. The detection main board is equipped with a VOC detection module, a CH2O detection module, a CO detection module, a CO2 detection module, and a PM2.5 detection module connector for connecting the PM2.5 detection module.

[0014] Furthermore, the bottom of the inner cylinder is provided with a VOC detection chamber, a CH2O detection chamber, a CO detection chamber, a CO2 detection chamber, and a PM2.5 detection chamber; the bottom of the inner cylinder is also provided with small screw holes for connecting the detection motherboard, large screw holes for connecting the base, and mounting holes for connecting the outer cylinder.

[0015] Furthermore, the base has outward-facing "C"-shaped edges around its perimeter to create a double-layered base, with the upper layer communicating with the outside; the upper layer has a bottom air intake hole for air intake.

[0016] Furthermore, the base has a screw sleeve in the middle that is aligned with the large screw hole for inserting the large screw; the base has a bottom locking block, and the lower part of the outer cylinder has a bottom locking groove that cooperates with the bottom locking block.

[0017] The beneficial effects of this utility model are:

[0018] 1. This utility model, by setting guide grooves around the top cover, not only allows air to circulate evenly and avoids dead zones and stagnation, but also ensures smooth internal gas flow, reduces internal and external pressure differences, and improves detection accuracy.

[0019] 2. This utility model isolates different sensor modules by setting up independent detection chambers. Each sensor is equipped with an independent detection chamber to prevent cross-interference between sensors, ensure that each sensor works independently, and improve the independence and reliability of measurement data.

[0020] 3. This utility model provides honeycomb holes on the outer cylinder corresponding to the detection port of each sensor for air intake, ensuring that the airflow enters the detection area of ​​each sensor evenly, thereby improving the response time and measurement accuracy of the sensor. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 ;

[0023] Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 ;

[0024] Figure 3 This is a cross-sectional structural diagram of the present invention;

[0025] Figure 4 This is a schematic diagram of the structure of the inner cylinder, the light strip, and the sensor of this utility model;

[0026] Figure 5 This is a schematic diagram of the inner cylinder of this utility model;

[0027] Figure 6 This is a bottom view of the inner cylinder structure of this utility model;

[0028] Figure 7 This is a schematic diagram of the mainboard and various sensors of this utility model.

[0029] In the diagram: 1. Outer cylinder, 2. Top cover, 201. Wall panel, 202. Top buckle, 3. Base, 301. Bottom air inlet, 302. Bottom buckle, 303. Screw sleeve, 4. Guide channel, 5. Inner cylinder, 501. VOC detection chamber, 502. CH2O detection chamber, 503. CO detection chamber, 504. CO2 detection chamber, 505. Large screw hole, 506. PM2.5 detection chamber, 507. Small screw hole, 508. Mounting hole, 6. LED strip, 7. VOC detection module, 8. CH2O detection module, 9. CO detection module, 10. CO2 detection module, 11. PM2.5 detection module connector, 12. Detection main board. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] like Figure 1 As shown in Embodiment 1 of this utility model, an air quality detector includes a housing and a top cover 2. The main housing contains several independent chambers for mounting sensors. Multiple air inlets 101 are evenly distributed on the outer side of the main housing facing the sensors, allowing airflow to uniformly enter the detection area of ​​each sensor, improving sensor response time and measurement accuracy. The top cover 2 is connected to the top of the main housing, and several spaced protrusions are provided between the top cover 2 and the main housing. These protrusions not only protrude from the top cover 2, but their ends also press against the main housing, creating gaps around the top cover 2 and the main housing. These gaps form guide channels 4, allowing for uniform airflow and avoiding dead zones and stagnation.

[0032] Furthermore, such as Figure 2 and Figure 3 As shown, the main housing includes an inner cylinder 5, a base 3 disposed at the bottom of the inner cylinder 5, and an outer cylinder 1 covering the outside of the inner cylinder 5. In this embodiment, the bottom of the outer cylinder 1 is snapped into the base 3, and the top is snapped into the top cover 2; the base 3 is connected to the inner cylinder 5 by screws.

[0033] Furthermore, such as Figure 1 and Figure 3 As shown, the outer contours of the cross-sections of both the inner cylinder 5 and the outer cylinder 1 are rectangular. Furthermore, the outer cylinder 1 has a concave arc-shaped waistline at its center in the axial direction, meaning that the cross-section at the center of the outer cylinder is smaller than the cross-sections at its upper and lower ends.

[0034] Example 2 differs from Example 1 in that, as Figure 3 As shown, the lower edge of the top cover 2 has a downwardly extending sidewall 202, with at least one open end on each sidewall. The open end is relatively wide, and a downwardly extending locking block 201 is provided on the open end. Since the upper end of the locking block 201 is fixed and the lower end is free, it can generate a certain elastic displacement. A protrusion is provided on the outer side of the lower end of the locking block 201. The top of the outer cylinder 1 has a top groove that mates with the locking block 201, allowing the lower end of the locking block 201 and its protrusion to be inserted, thereby achieving a locking effect. The top cover 2 has several outwardly extending ridges around its perimeter, and the top of the outer cylinder 1 has a top groove that mates with the ends of the ridges, exposing the middle part of the ridges between the top cover 2 and the outer cylinder 1. The ridges create a gap between the top cover 2 and the outer cylinder 1. In addition, since the side of the outer cylinder 1 is arc-shaped and the top of the outer cylinder 1 is slightly inclined outward, the gap around the top cover 2 forms a guide channel 4 for air circulation.

[0035] Example 3 differs from Example 2 in that, as Figure 3 and Figure 6 As shown, the bottom of the inner cylinder 5 is provided with several independent detection chambers for installing sensors. Figure 4 and Figure 5 As shown, the lower parts of both sides of the inner cylinder 5 are provided with detection ports that communicate with independent chambers. That is, the side wall of the inner cylinder at this location has an opening to facilitate air entering the detection chamber from the detection port. The lower part of the outer cylinder 1 is provided with the aforementioned air inlet 101 corresponding to the detection position. In this embodiment, there are many air inlets 101, which are arranged densely in a honeycomb pattern, further enabling air to enter the detection port quickly and evenly.

[0036] Example 4 differs from Example 3 in that, as Figure 4 and Figure 5 As shown, the inner cylinder 5 has inner grooves on its other two sides, and light strips 6 are installed in the inner grooves. Figure 5 As shown, the recessed groove is provided with screw holes for mounting the LED strip 6 and a retaining ring with an opening for positioning the LED strip's wiring harness. Figure 1 and Figure 2 As shown, a light-transmitting hole is provided at the corresponding position of the outer cylinder 1.

[0037] Example 5 differs from Example 3 in that, as Figure 3 As shown, a detection main board 12 is sandwiched between the bottom of the inner cylinder 5 and the base 3, that is, the detection main board 12 is installed between the bottom of the inner cylinder 5 and the base 3. Figure 7 As shown, the upper side of the detection motherboard 12 is provided with a VOC detection module 7, a CH2O detection module 8, a CO detection module 9, a CO2 detection module 10 that extend into the inner cylinder 5, and a PM2.5 detection module connector 11 for connecting the PM2.5 detection module.

[0038] Furthermore, such as Figure 6 As shown, the bottom of the inner cylinder 5 is provided with VOC detection chambers 501, 502, 503, 504, and 506, respectively corresponding to the VOC detection module 7, CH2O detection module 8, CO detection module 9, CO2 detection module 10, and PM2.5 detection module. That is, each of these chambers has a top plate and side plates or partitions to separate independent chambers. The detection ports of VOC detection chamber 501 and CO2 detection chamber 504 face the same side. Both VOC detection chamber 501 and CO2 detection chamber 504 have side plates on the outward-facing side of their detection ports, and the lower ends of these two side plates are spaced a certain distance from the main detection board 12 and the base to form detection ports. A partition is provided between the VOC detection chamber 501 and the CO2 detection chamber 504. The side plates of the VOC detection chamber 501 and the CO2 detection chamber 504 away from the partition and the lower end of the partition contact the detection main board 12. There is a gap between the back plate of the VOC detection chamber 501 and the CO2 detection chamber 504 and the detection main board 1 to allow air circulation.

[0039] like Figure 6 As shown, the detection ports of CH2O detection chamber 502 and CO detection chamber 503 face the same side, which is the side away from the detection ports of VOC detection chamber 501 and CO2 detection chamber 504. Both the detection port sides of CH2O detection chamber 502 and CO detection chamber 503 (the outward-facing sides) have side plates, and the lower ends of these two side plates are spaced apart from the detection main board 12 and the base to form detection ports. A partition is provided between CH2O detection chamber 502 and CO detection chamber 503, and the side plates of CH2O detection chamber 502 and CO detection chamber 503 away from the partition, as well as the lower ends of the partition, contact the detection main board 12. A gap exists between the back plates of CH2O detection chamber 502 and CO detection chamber 503 and the detection main board 12 to allow air circulation.

[0040] like Figure 6 As shown, the detection port of the PM2.5 detection chamber 506 faces the other side. The side of the PM2.5 detection chamber 506 facing outward does not have a side plate. The left and right sides of the PM2.5 detection chamber 506, that is, the two sides adjacent to the VOC detection chamber 501 and the CH2O detection chamber 502, are provided with horizontal clamping plates, which facilitates the installation of the PM2.5 detection module after it is inserted into the clamping plates from the outside.

[0041] In addition, the lower part of the inner cylinder 5, apart from the aforementioned chambers, has through holes leading directly to the top. Furthermore, the gap between the back plate of the aforementioned chambers and the detection main board 12 allows air to enter through these through holes and flow to the top, exiting from the guide groove 4.

[0042] Example 6 differs from Example 5 in that, as Figure 6 As shown, the bottom of the inner cylinder 5 is also provided with a small screw hole 507 for connecting the detection motherboard 12. The corresponding position of the detection motherboard 12 is also provided with a small screw hole. The detection motherboard 12 and the inner cylinder 5 are connected by passing through the small screw hole.

[0043] like Figure 6 As shown, the bottom of the inner cylinder 5 is also provided with a large screw hole 505 for connecting the base 3. Figure 3 As shown, the base 3 has a screw sleeve 303 in the middle that is aligned with the large screw hole 505. (As indicated...) Figure 7 As shown, a through hole is provided at the corresponding position of the detection motherboard 12. A large screw is passed through the screw sleeve 303 and then through the through hole and screwed into the large screw hole 505 to connect the base 3 to the detection motherboard 12 and the inner cylinder 5.

[0044] like Figure 6 As shown, the inner cylinder 5 has mounting holes 508 at its four bottom corners for connecting to the outer cylinder 1, and the outer cylinder 1 has screw holes at its four bottom corners that coincide with the mounting holes 508. The detection mainboard 12 also has corresponding screw holes that coincide with the mounting holes 508. The detection mainboard 12, the inner cylinder 5, and the outer cylinder 1 are fixedly connected by screws inserted into the screw holes of the detection mainboard 12, the mounting holes 508 of the inner cylinder 5, and the screw holes of the outer cylinder 1.

[0045] Example 7 differs from Example 5 in that, as Figure 6 As shown, the base 3 is provided with at least a pair of symmetrical bottom locking blocks 302. The bottom locking blocks 302 extend upward and outward at an angle. The upper outer side of the bottom locking block 302 is provided with a protrusion. The lower part of the outer cylinder 1 is provided with a bottom locking groove that cooperates with the bottom locking blocks 302.

[0046] Example 8 differs from Example 5 in that, as Figure 3As shown, the base 3 has outward-facing "C"-shaped edges around its perimeter, creating a double-layered bottom. The upper bottom is connected to the outer cylinder 1, and the opening between the two layers faces outward, allowing the upper bottom to communicate with the outside. Multiple bottom air inlets 301 are evenly distributed on the upper bottom perimeter, ensuring more uniform airflow.

[0047] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any modifications to the technical solutions described in the foregoing embodiments, or equivalent substitutions of some or all of the technical features therein, within the spirit and principles of the present utility model, shall not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present utility model, and shall all be included within the protection scope of the present utility model.

Claims

1. An air quality detector, characterized in that, It includes a main housing and a top cover (2) connected to the top of the main housing. The main housing has several independent chambers for installing sensors. Multiple air inlets (101) are evenly distributed on the part of the main housing facing the sensors. The top cover (2) and the main housing have several spaced protrusions to create a gap between the top cover (2) and the main housing to form a guide groove (4).

2. The air quality detector according to claim 1, characterized in that, The main housing includes an inner cylinder (5), a base (3) located at the bottom of the inner cylinder (5), and an outer cylinder (1) covering the outside of the inner cylinder (5); the inner cylinder (5) is detachably connected to the outer cylinder (1) and the base (3), and the top of the outer cylinder (1) is snapped into the top cover (2).

3. The air quality detector according to claim 2, characterized in that, The outer contours of the cross-sections of the inner cylinder (5) and the outer cylinder (1) are both rectangular, and the outer cylinder (1) has a concave arc-shaped waistline in the middle.

4. The air quality detector according to claim 2 or 3, characterized in that, The top cover (2) has several snap-fit ​​blocks (201) on its lower side, and the top of the outer cylinder (1) has a top slot that cooperates with the snap-fit ​​blocks (201); the top cover (2) has several outwardly extending protrusions around its perimeter, and the top of the outer cylinder (1) has a top groove that cooperates with the end of the protrusions.

5. The air quality detector according to claim 2 or 3, characterized in that, The lower sides of the inner cylinder (5) are provided with detection ports that communicate with independent chambers respectively; the corresponding position of the lower part of the outer cylinder (1) is provided with the air inlet (101).

6. The air quality detector according to claim 5, characterized in that, The inner cylinder (5) has inner grooves on its other two sides, and light strips (6) are provided in the inner grooves. The outer cylinder (1) has light-transmitting holes at the corresponding positions.

7. The air quality detector according to claim 2, 3, or 6, characterized in that, The inner cylinder (5) is sandwiched between the bottom and the base (3) to hold the detection main board (12). The detection main board (12) is equipped with a VOC detection module (7), a CH2O detection module (8), a CO detection module (9), a CO2 detection module (10), and a PM2.5 detection module connector (11) for connecting the PM2.5 detection module.

8. The air quality detector according to claim 7, characterized in that, The bottom of the inner cylinder (5) is provided with a VOC detection chamber (501), a CH2O detection chamber (502), a CO detection chamber (503), a CO2 detection chamber (504), and a PM2.5 detection chamber (506); the bottom of the inner cylinder (5) is also provided with a small screw hole (507) for connecting the detection main board (12), a large screw hole (505) for connecting the base (3), and a mounting hole (508) for connecting the outer cylinder (1).

9. The air quality detector according to claim 2, 3, 6, or 8, characterized in that, The base (3) has an outward-facing "C"-shaped edge around its perimeter so that the base (3) has a double bottom with the upper bottom connected to the outside; the upper bottom has a bottom air inlet (301) for air intake.

10. The air quality detector according to claim 9, characterized in that, The base (3) has a screw tube (303) in the middle that is aligned with the large screw hole (505) for inserting the large screw; the base (3) has a bottom locking block (302) and the lower part of the outer cylinder (1) has a bottom locking groove that cooperates with the bottom locking block (302).

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