CN217466591U

CN217466591U - Integrated sensor

Info

Publication number: CN217466591U
Application number: CN202123042303.4U
Authority: CN
Inventors: 熊友辉; 刘志强; 何涛; 张�浩
Original assignee: Sifang Optoelectronic Co ltd
Current assignee: Sifang Optoelectronic Co ltd
Priority date: 2021-12-06
Filing date: 2021-12-06
Publication date: 2022-09-20
Anticipated expiration: 2031-12-06

Abstract

The utility model provides an integrated sensor, including the shell, dust detection module, second detection module, fan and PCB circuit board, through setting up second detection module and dust detection module in the both sides of PCB circuit board, make the sensor overall structure compact, reduce the temperature interference between each sensor simultaneously, the second detection module includes but not limited to one of temperature and humidity sensor and VOC sensor, through setting up VOC sensor in the position that is close to the air current passageway, can accelerate the air current diffusion with the help of the fan of dust detection module, promote VOC sensor's response speed, can avoid fan heat dissipation to influence the heating temperature of VOC sensor simultaneously, through setting up temperature and humidity sensor in the air intake department of air intake passageway, eliminate electronic components and parts and generate heat, to the error that temperature and humidity detected caused; the utility model provides an integrated sensor has compact structure, low cost, measurement accuracy height and the fast technical advantage of response speed.

Description

Integrated sensor

Technical Field

The utility model belongs to the technical field of the air quality detects, more specifically says, relates to an integrated sensor.

Background

Along with the improvement of life quality, the attention of users to air quality is increased day by day, users pay attention to a plurality of air quality indexes such as dust content, air temperature, humidity and VOC content, therefore, a plurality of independent sensors with different measurement functions are required to be equipped in air purification systems such as fresh air systems, air purifiers and air conditioners to meet diversified air quality monitoring requirements, the technology of equipping a plurality of independent sensors with different measurement functions is mature, the method is simple, but the cost and the volume of the whole air quality monitoring system are increased, and the air quality monitoring system is not suitable for large-scale industrial application.

In order to reduce the cost and volume of the entire air quality monitoring system, it is necessary to develop an integrated sensor having a multi-component measurement function.

Patent document CN108025623A discloses an active air purifier for an automobile, which is capable of reducing the measurement delay of multiple sensors by serially arranging multiple sensors in the air purifier in a sensor housing along the air flow direction to respectively sense the concentration of different components in the air, and performing air flow collection by the multiple sensors through a fan. It merely places multiple sensors in series, resulting in a bulky sensor housing.

Patent document CN209417008U discloses a novel air quality detection device, it is with the dust detection module, the VOC sensor, temperature and humidity sensor integration is in an air quality detection device, through with the VOC sensor, temperature and humidity sensor all sets up the different sides at the PCB circuit board with the dust detection module, make air quality detection device compact structure, the fan of each detection module sharing dust detection module simultaneously, the response speed of VOC sensor and temperature and humidity sensor has been improved, but it closes on temperature and humidity sensor and VOC sensor to set up, temperature and humidity measurement result is influenced by the VOC sensor generates heat, the measuring result precision is low.

Therefore, the integrated sensor in the prior art has a large improvement space in performance, volume and cost.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a measurement accuracy is high, compact structure, low-cost integrated sensor to solve current integrated sensor measurement accuracy low, bulky and with high costs technical problem.

In order to solve the above problem, the utility model provides an integrated sensor, include:

a housing, a middle frame, a PCB, a dust detection module, a fan and a second detection module,

the shell comprises an upper cover and a lower cover, the upper cover is provided with an air inlet, the middle frame body is arranged in the shell and is covered by the shell, and the middle frame body is provided with a fan mounting groove;

the PCB circuit board is arranged between the middle frame body and the upper cover, and a second air inlet notch is formed in the PCB circuit board and used for guiding the measured airflow entering the shell from the air inlet to the lower side of the PCB circuit board;

the dust detection module is positioned in an area enclosed by the PCB and the lower cover;

the second detection module is arranged in an area enclosed by the PCB and the upper cover, and the detected airflow extracted by the fan flows through the detection area of the dust detection module and flows out of the shell from the air outlet of the fan.

Preferably, the second detection module comprises a temperature and humidity sensor, the temperature and humidity sensor is arranged at the air inlet close to the upper cover, and the temperature and humidity sensor is electrically connected with the PCB.

Preferably, the second detection module further comprises a VOC sensor, the VOC sensor is arranged at a position close to the second air inlet gap, and the VOC sensor is electrically connected with the PCB circuit board.

Preferably, the second air inlet gap and the air inlet of the upper cover are arranged at intervals and are respectively positioned at two sides of the PCB.

Preferably, the upper part of the middle frame body protrudes out of the PCB and abuts against the upper cover, the middle frame body is provided with a first air inlet notch, and the first air inlet notch is opposite to the air inlet, so that the measured airflow entering the housing from the air inlet reaches the upper side of the PCB from the first air inlet notch and flows to the lower side of the PCB from the second air inlet notch.

Preferably, on the lower side of the PCB, a plurality of vertical baffles on the middle frame form an airflow channel, and the airflow channel is used for guiding the measured airflow flowing from the second air inlet gap to the lower side of the PCB to the air inlet of the fan.

Preferably, the fan mounting groove is provided with a first vent communicated with the airflow channel, and the fan is mounted in the fan mounting groove and located in the upper cover space avoiding area.

Preferably, the dust detection module includes laser emission module and detector, the laser emission module is located airflow channel one side, the laser that the laser emission module transmitted jets into airflow channel, the detector is located the downside of PCB circuit board to be located in the airflow channel, the laser that the laser emission module transmitted with the crossing department of being surveyed the air current is the detection area of dust detection module, the laser that the dust detection module transmitted shines the surveyed air current in the detection area and produces the scattered light, produced scattered light is sensed by the detector that is located detection area top.

Preferably, the space avoiding area of the upper cover and the upper cover together form a structure suitable for being connected with the lower cover.

Preferably, the housing is made of metal, and can be used for shielding signal interference.

Compared with the prior art, the utility model, following advantage and effect have:

1. the original structure of the dust detection module is not required to be changed, the functions of VOC detection and temperature and humidity detection are integrated on the basis of the dust detection module, and compared with a sensor with independent detection modules, the cost of the sensor is reduced, and the size of the sensor is also reduced;

2. the VOC sensor is arranged at a position close to the air flow channel, so that on one hand, air flow diffusion can be accelerated by means of a fan of the dust detection module, the response speed of the VOC sensor is improved, and on the other hand, the heating temperature of the VOC sensor is prevented from being influenced by heat dissipation of the fan;

3. the temperature and humidity sensor is arranged at an air inlet of the air inlet channel, so that the heat generated by electronic components is eliminated, and particularly, errors caused by the heat generated by the VOC sensor to temperature and humidity detection are eliminated;

4. the temperature and humidity sensor and the VOC sensor are arranged to be opposite to the laser emission and laser detection of the dust detection module, so that the overall structure of the sensor is more compact, and the temperature interference among the sensors is reduced;

5. the VOC sensor works in a low power consumption mode, so that the energy consumption of the whole integrated sensor is reduced, and more energy is saved; due to the fact that the temperature and humidity sensor is arranged, temperature and humidity correction can be conducted on measurement results of the VOC sensor, the dust detection module and the like according to temperature and humidity data obtained through measurement.

Drawings

Fig. 1 is an exploded view of an integrated sensor according to an embodiment of the present invention;

fig. 2 is an exploded view of the integrated sensor in another direction according to an embodiment of the present invention;

fig. 3 is a schematic structural view of an intermediate frame body in an embodiment of the present invention;

FIG. 4 is a schematic structural view of a housing in the practice of the present invention;

fig. 5 is the air channel structure projection and the air flow direction schematic diagram of the present invention.

Description of reference numerals:

100-a housing; 101-a lower cover; 102-an upper cover; 103-air inlet; 200-a middle frame; 201-first air intake gap; 202-an airflow channel; 203-fan mounting grooves; 204-card slot; 2031 — first vent; 300-a PCB circuit board; 301-a second air intake gap; 400-a fan; 401-fan outlet; 402-fan inlet; 500-a VOC sensor; 600-a laser emission module; 700-a detector; 800-temperature and humidity sensor; 900-ground protection sheet.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.

Referring to fig. 1 to 5, an embodiment of the present invention provides an integrated sensor, which includes a housing 100, a middle frame 200, a PCB 300, a fan 400, a dust detection module, and a second detection module.

Referring to fig. 4, the housing 100 includes a lower cover 101 and an upper cover 102, the lower cover 101 and the upper cover 102 are connected in a matching manner, wherein the upper cover 102 is a rectangular frame structure, the fan 400 is a square structure, and the clearance area of the fan 400 corresponding to the upper cover 102 and the upper cover 102 form a structure suitable for being connected with the lower cover 101, so that the clearance area is provided at the position of the upper cover 102 corresponding to the fan 400 to prevent the fan 400 from being wrapped by the housing 100.

Referring to fig. 1-2, the middle frame 200 and the PCB 300 are disposed in the housing 100, the upper cover 102 is disposed with an air inlet 103, and the airflow to be measured enters the integrated sensor through the air inlet 103 and flows out of the integrated sensor through the fan outlet 401 of the fan 400.

The middle frame 200 is provided with a first air inlet notch 201, an air flow channel 202 and a fan mounting groove 203, wherein the first air inlet notch 201 corresponds to the position of the air inlet 103 on the upper cover 102, and the fan mounting groove 203 is provided with a first air vent 2031 communicated with the air flow channel 202, so that air flow can flow into the air flow channel 202.

Referring to fig. 1-2, in the present embodiment, the PCB 300 is disposed between the middle frame 200 and the upper cover 102, a second air inlet gap 301 is disposed on a side of the PCB 300 away from the first air inlet gap 201, and the measured air entering through the air inlet 103 on the housing 100 reaches the upper side of the PCB 300 through the first air inlet gap 201 on the middle frame 200, and reaches the lower side of the PCB 300 through the second air inlet gap 301 on the PCB 300, that is, enters the air flow channel 202 of the middle frame 200, reaches the fan 400 through the air flow channel 202, and flows out of the integrated sensor through the fan outlet 401.

Referring to fig. 1-2, a fan 400 is installed in the fan installation slot 203, and a measured airflow is drawn by the fan 400 to form a stable airflow in the integrated sensor, so that each sensor in the integrated sensor can complete data sampling. The VOC sensor 500 is disposed near the airflow channel 202, so that the airflow diffusion can be accelerated by the fan inlet 402 to increase the response speed of the VOC sensor 500, and the heating temperature of the VOC sensor 500 can be prevented from being affected by the heat dissipation of the fan inlet 402. In this embodiment, the VOC sensor 500 is disposed near the second air intake gap 301 and on the side of the PCB 300 away from the air flow channel 202, and the air flow to be measured from the first air intake gap 201 to the second air intake gap 301 can be collected by the VOC sensor 500, so as to measure the content of the organic volatile compound in the air flow.

In addition, the airflow channel 202 on the middle frame 200 is formed by connecting irregular blocking walls, the airflow channel 202 is arranged on the lower side of the PCB 300, a dust detection module is arranged on the PCB 300 and in the airflow channel 202, the dust detection module comprises a laser emission module 600 and a detector 700, and the laser emission module 600 and the detector 700 are electrically connected with the PCB 300.

Referring to fig. 1-2, the integrated sensor in this embodiment further includes a temperature and humidity sensor 800, the temperature and humidity sensor 800 is disposed at the first air inlet gap 201 near the air inlet channel, and the temperature and humidity sensor 800 is electrically connected to the PCB 300.

Temperature and humidity sensor 800 sets up in the first breach 201 of admitting air of inlet air duct department, can eliminate electronic components and parts and generate heat, and VOC sensor 500 generates heat especially and to the error that temperature and humidity detected and cause.

From this, the dust detects the module and sets up (distribute in the both sides of PCB circuit board 300) with temperature and

humidity sensor

800 and 500 antarafacial of VOC sensor, can make the holistic structure of integrated sensor compacter, reduces the temperature interference between each sensor simultaneously.

Specifically, referring to fig. 1-2, in the present embodiment, a card slot 204 is further disposed on the middle frame 200, a grounding protection sheet 900 is connected in the card slot 204 in a clamping manner, and the grounding protection sheet 900 is electrically connected to the PCB 300.

Therefore, the grounding protection sheet 900 is connected in the clamping groove 204 in a clamping mode, the grounding protection sheet 900 is electrically connected with the PCB 300, products can be effectively protected, and the use safety is guaranteed.

In the present embodiment, the fan outlet 401 and the air inlet 103 are located on the same side of the housing 100. However, this is not limited thereto, and in fact, the air outlet 401 and the air inlet 103 may be disposed on different sides of the housing 100.

In this embodiment, the lower cover 101 and the upper cover 102 are made of metal, and are usually made of stainless steel, which can provide a good shielding effect for external interference signals, and the lower cover 101 and the upper cover 102 are detachably connected.

Although the present disclosure has been described above, the scope of the present disclosure is not limited thereto. Various changes and modifications may be made by those skilled in the art without departing from the spirit and scope of the present disclosure, and these changes and modifications are intended to fall within the scope of the present disclosure.

Claims

1. An integrated sensor, comprising:

the shell comprises an upper cover and a lower cover, an air inlet is formed in the upper cover, the middle frame body is arranged in the shell, and a fan mounting groove is formed in the middle frame body;

2. The integrated sensor of claim 1, wherein the second detection module comprises a temperature and humidity sensor, the temperature and humidity sensor is disposed at the air inlet close to the upper cover, and the temperature and humidity sensor is electrically connected to the PCB.

3. The integrated sensor of any one of claims 1 or 2, wherein the second detection module further comprises a VOC sensor disposed proximate the second air intake gap, the VOC sensor being electrically connected to the PCB circuit board.

4. The integrated sensor of claim 3, wherein the second air inlet notch is spaced apart from the air inlet of the upper cover and is respectively located at two sides of the PCB circuit board.

5. The integrated sensor according to claim 1, wherein an upper portion of the middle frame protrudes from the PCB and abuts against the upper cover, and a first air inlet notch is formed in the middle frame, and the first air inlet notch is opposite to the air inlet, so that the measured air flow entering the housing from the air inlet reaches an upper side of the PCB from the first air inlet notch and flows to a lower side of the PCB from the second air inlet notch.

6. The integrated sensor of claim 1, wherein the plurality of vertical baffles on the intermediate frame form an airflow channel on the underside of the PCB circuit board for directing a measured airflow passing from the second air intake gap to the underside of the PCB circuit board to the air intake of the fan.

7. The integrated sensor according to claim 6, wherein the fan mounting groove is provided with a first vent communicated with the airflow channel, and the fan is mounted in the fan mounting groove and located in the keep-out area of the upper cover.

8. The integrated sensor according to claim 6, wherein the dust detection module comprises a laser emission module and a detector, the laser emission module is located on one side of the airflow channel, the laser emitted by the laser emission module is emitted into the airflow channel, the detector is located on the lower side of the PCB and is located in the airflow channel, the intersection of the laser emitted by the laser emission module and the detected airflow is a detection area of the dust detection module, the laser emitted by the dust detection module irradiates the detected airflow in the detection area to generate scattered light, and the generated scattered light is sensed by the detector located above the detection area.

9. The integrated sensor of claim 1, wherein the keep-out area of the upper cover and the upper cover together form a structure adapted to be coupled to the lower cover.

10. The integrated sensor of claim 1, wherein the housing is made of metal and is configured to shield signal interference.