CN214310383U

CN214310383U - Handheld TVOC check out test set

Info

Publication number: CN214310383U
Application number: CN202023112638.4U
Authority: CN
Inventors: 田启明; 亓俊涛
Original assignee: Beijing Insights Value Technology Co ltd
Current assignee: Beijing Yingshi Ruida Technology Co.,Ltd.
Priority date: 2020-12-22
Filing date: 2020-12-22
Publication date: 2021-09-28
Anticipated expiration: 2030-12-22

Abstract

The utility model discloses a handheld TVOC check out test set, include: the detection device comprises a shell used for forming an accommodating cavity, wherein a detection cavity is arranged in the accommodating cavity, and a first end of the shell is provided with an air inlet communicated with the detection cavity; the turbofan is fixed at the second end of the detection cavity and used for exhausting air to the detection cavity; the PID sensor and the temperature and humidity sensor are communicated with the detection cavity and are used for detecting gas flowing through the detection cavity; a main circuit board mounted in the accommodation cavity; the display screen is fixed on the shell; the wireless antenna uploads the data acquired by the PID sensor and the temperature and humidity sensor to the background in real time; and the battery is fixed in the accommodating cavity. The utility model can upload the collected data to the background in real time; the air inlet mode adopts a fan structure, and the air inlet channel is short, so that the reaction is sensitive, and the detection is less interfered; the temperature and humidity sensor is arranged in the temperature and humidity sensor, so that the environmental influence can be effectively reduced; and simple structure, small, the structure is light, the handheld detection of being convenient for.

Description

Handheld TVOC check out test set

Technical Field

The utility model relates to a gaseous check out test set technical field especially relates to a handheld TVOC check out test set.

Background

In recent years, environmental problems are increasingly highlighted, ozone is used as a primary pollutant, the proportion of the ozone influencing air quality is gradually increased, and Volatile Organic Compounds (TVOC for short) are important preconditions for forming ozone and PM2.5, so that the detection of the TVOC content has important significance for environmental monitoring.

However, the data can only be checked manually from the display screen of the traditional handheld detection equipment, the use is inconvenient, the sensor in the detection equipment is influenced greatly by temperature and humidity, and the data error is large under the conditions of high temperature, high humidity and the like, so that the detection effect is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a handheld TVOC check out test set for solve prior art, use inconvenient and the great problem of data error.

In order to solve the above problem, the utility model adopts the following technical scheme:

provided is a handheld TVOC detecting device, including:

the detection device comprises a shell, a detection device and a detection device, wherein the shell is used for forming an accommodating cavity, a detection cavity extending along the axial direction of the accommodating cavity is arranged in the accommodating cavity, and a first end of the shell is provided with an air inlet communicated with the detection cavity;

the turbofan is fixed at the second end of the detection cavity and used for exhausting air to the detection cavity, wherein the second end of the detection cavity is one end far away from the air inlet;

the PID sensor is communicated with the detection cavity and positioned between the turbofan and the air inlet, and is used for detecting gas flowing through the detection cavity;

the temperature and humidity sensor is communicated with the detection cavity and positioned between the turbofan and the air inlet, and is used for detecting air flowing through the detection cavity;

the main circuit board is installed in the accommodating cavity, receives data collected by the PID sensor and the temperature and humidity sensor, and performs temperature and humidity compensation on the data collected by the temperature and humidity sensor;

the display screen is fixed on the shell and displays the data acquired by the PID sensor;

the wireless antenna is electrically connected with the main circuit board and uploads the data acquired by the PID sensor and the temperature and humidity sensor to a background in real time;

the battery is fixed in the accommodating cavity and is electrically connected with the main circuit board.

Optionally, handheld TVOC check out test set is including fixing inner shell in the shell, the inner shell is including constituting the inner shell body that detects the chamber, be located inner shell body second end just is used for the installation turbofan's fan bracket and being located inner shell body middle part and PID sensor support, the temperature and humidity sensor support of just arranging in proper order, the first end and the second end of inner shell body with shell fixed connection, the battery is fixed the inner shell with between the shell second end.

Optionally, the position that is used for setting up of inner shell body PID sensor support with the temperature and humidity sensor support is the platykurtic, the first end of inner shell body is rectangular plate-like, the first end top of inner shell body is equipped with the heavy groove of holding mounting, the mounting with shell fixed connection, just the first end of inner shell body with be equipped with sealed the pad between the shell, the mounting is worn to establish sealed pad.

Optionally, a connecting plate and a sealing pressing block embedded in the housing are sequentially arranged between the sealing gasket and the housing, the connecting plate and the sealing pressing block are provided with communicating holes for communicating the air inlet and the detection cavity, and the fixing piece penetrates through the connecting plate and the sealing pressing block and is fixedly connected with the housing.

Optionally, the shell includes the epitheca, with the inferior valve of epitheca lock with be located the epitheca the first end of inferior valve and with the epitheca the end plate of inferior valve lock, the epitheca the inferior valve with the end plate constitutes hold the chamber.

Optionally, the air inlet is formed by a pagoda joint embedded in the end plate.

Optionally, the second end of the inner casing body is rectangular plate-shaped, the second end of the inner casing body is fixedly connected with the outer casing through a fastener, and the fan bracket is fixedly connected with the inner casing body through a connecting piece.

Optionally, the PID sensor bracket includes a first pressure plate pressed on the top of the PID sensor and a column arranged on the inner shell body and connected to the first pressure plate;

the temperature and humidity sensor support comprises a second pressing plate arranged at the top of the temperature and humidity sensor in a pressing mode, and the second pressing plate is connected with the inner shell body.

Optionally, the wireless antenna is fixed on a side wall of the housing near the second end and exposed out of the housing.

Optionally, the handheld TVOC detecting device further includes an indicator light, a power switch and a charging port for charging the battery, which are respectively connected to the main circuit board.

The utility model discloses a technical scheme can reach following beneficial effect:

the built-in 4G wireless communication module can upload the acquired data to a background in real time; the air inlet mode adopts a fan structure, and the air inlet channel is short, so that the reaction is sensitive, and the detection is less interfered; meanwhile, the temperature and humidity sensor is arranged in the temperature and humidity sensor, so that the environmental influence can be effectively reduced; and simple structure, small, the structure is light, the handheld detection of being convenient for.

The method adopts a turbofan air suction sampling mode, has no noise, has the service life of a turbofan which is more than several times of that of a pump suction mode, and simultaneously has stable sampling airflow without fluctuation of the airflow, thereby ensuring stable sensor data; the turbofan can adopt PWM control, and adjustable air current size, its feedback signal can be uploaded the running state of fan to the backstage server, can judge whether equipment admits air normally through detecting feedback signal.

Drawings

In order to more clearly illustrate the technical solution of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly introduced below to form a part of the present invention, and the exemplary embodiments and the description thereof of the present invention explain the present invention and do not form an improper limitation to the present invention. In the drawings:

fig. 1 is a schematic structural diagram of a handheld TVOC detecting device disclosed in an embodiment of the present invention;

fig. 2 is a schematic diagram of an internal structure of a handheld TVOC detecting device disclosed in an embodiment of the present invention;

FIG. 3 is an enlarged view of portion A of FIG. 2;

fig. 4 is a schematic structural view illustrating the fixing of the inner shell and the end plate according to the embodiment of the present invention;

fig. 5 is a schematic structural diagram of a first end direction of an inner shell according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of the second end direction of the inner shell according to the embodiment of the present invention.

Wherein the following reference numerals are specifically included in figures 1-6:

a housing-1; a housing cavity-11; -an upper shell-12; a lower shell-13; an end plate-14; an air inlet-15; pagoda joint-16;

an inner shell-2; a detection chamber-21; an inner shell body-22; a fan bracket-23; PID sensor support-24; temperature and humidity sensor support-25; sink tank-26; a first platen-241; column-242;

a turbofan-31; a PID sensor-32; a temperature and humidity sensor-33; a main circuit board-34; a display screen-35; a wireless antenna-36; a battery-37; an indicator light-38; a power switch-39; a charging port-310;

a seal-41; a connecting plate-42; and (4) sealing and pressing the block-43.

Detailed Description

To make the purpose, technical solution and advantages of the present invention clearer, the following will combine the embodiments of the present invention and the corresponding drawings to clearly and completely describe the technical solution of the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1 and fig. 2, the handheld TVOC detecting device of the present invention includes a housing 1, a turbofan 31, a PID sensor 32, a temperature and humidity sensor 33, a main circuit board 34, a display screen 35, a wireless antenna 36 and a battery 37. The housing 1 may be a stainless steel housing 1, which is corrosion resistant and not prone to adsorbing polluted gases, and includes an upper shell 12, a lower shell 13, and an end plate 14. The end plate 14 is substantially rectangular plate-shaped and is disposed at a first end of the upper casing 12 and the lower casing 13, the upper casing 12 and the lower casing 13 are fastened to each other and fixed to the end plate 14 at the first end by screws, and the end plate 14, the upper casing 12 and the lower casing 13 form the accommodating cavity 11.

As shown in fig. 2, 4 and 5, the outer casing 1 is provided with an inner casing 2, the inner casing 2 forms a detection chamber 21, the end plate 14 is provided with an air inlet 15 for communicating the detection chamber 21 with the outside, and specifically, the end plate 14 may be provided with a pagoda joint 16, and the air inlet 15 is formed by the pagoda joint 16. The inner casing 2 specifically includes an inner casing body 22 forming the detection cavity 21, a fan support 23 located at the second end of the inner casing body 22, and a PID sensor support 24 and a temperature and humidity sensor support 25 located in the middle of the inner casing body 22 and arranged in sequence. The PID sensor support 24 is used for fixing the PID sensor 32 on the inner shell body 22, the temperature and humidity sensor support 25 is used for fixing the temperature and humidity sensor 33 on the inner shell body 22, the fan support 23 is used for fixing the turbofan 31 on the inner shell body 22, and openings are formed in the inner shell body 22, so that the PID sensor 32 and the temperature and humidity sensor 33 are communicated with the detection cavity 21. When the gas detection device works, the turbofan 31 sucks gas into the detection cavity 21 from the gas inlet 15 to realize active gas inlet, the PID sensor 32 detects TVOC content in the gas when the gas flows through the detection cavity 21, and the temperature and humidity sensor 33 detects temperature and humidity of the gas.

The inner case body 22 is flat at a portion where the PID sensor holder 24 and the temperature/humidity sensor holder 25 are provided. The first end of the inner housing body 22 is rectangular plate-shaped, and the top of the first end of the inner housing body 22 is provided with a sunken groove 26 (shown in fig. 5) for accommodating a fixing member, such as a screw, which is clamped in the sunken groove 26 and fixedly connected with the end plate 14. As shown in fig. 3, a sealing gasket 41, such as a silicone gasket, is disposed between the inner shell body 22 and the end plate 14, and a fixing member is disposed through the sealing gasket 41 and fixedly connected to the end plate 14. With the arrangement, the structure is simple, and the sealing performance between the inner shell body 22 and the end plate 14 can be effectively ensured.

Further, be equipped with the connecting plate 42 in proper order between sealed 41 and the end plate 14 and be embedded in the sealed briquetting 43 in shell 1, connecting plate 42 and sealed briquetting 43 are equipped with the intercommunication hole that communicates air inlet 15 and detect chamber 21, and the mounting wears to locate connecting plate 42 and sealed briquetting 43 and with shell 1 fixed connection, and sealed briquetting 43 can be the silica gel briquetting to further improve the leakproofness between inner shell body 22 and the end plate 14.

As shown in fig. 2, 4 and 6, the second end of the inner housing body 22 is also rectangular plate-shaped, the second end of the inner housing body 22 abuts against the lower housing 13 and is fixedly connected with the lower housing 13 by a fastener, which may be a screw, for example. The fan bracket 23 has a rectangular frame shape and is fixed to the second end of the inner case body 22 by, for example, screws. The PID sensor holder 24 includes a first pressing plate 241 pressed on the top of the PID sensor 32 and a column 242 provided on the inner case body 22 and connected to the first pressing plate 241. The temperature and humidity sensor support 25 comprises a second pressing plate arranged on the top of the temperature and humidity sensor 33 in a pressing mode, and the second pressing plate is connected with the inner shell body 22. So set up, simple structure, the equipment of being convenient for, it is laborsaving to save trouble.

The main circuit board 34 receives the data collected by the PID sensor 32 and the temperature and humidity sensor 33 and performs temperature and humidity compensation on the data collected by the temperature and humidity sensor 33, so that the handheld TVOC detection device can be normally used under the weather conditions of overcast and rainy days, severe cold and severe summer heat and the like. A main circuit board 34 is also secured to the upper shell 12 near the second end of the upper shell 12.

The display screen 35 is constructed the same as a general display screen 35, and is electrically connected to the main circuit board 34 for displaying the TVOC content in real time. The display screen 35 is mounted on the upper case 12 and is located substantially above the inner case 2.

The wireless antenna 36 is electrically connected with the main circuit board 34, and uploads the data to the background in real time, so that inspection personnel can directly read the data on site, judge the pollution source condition and check the data change trend through the background. The wireless antenna 36 is fixed on the sidewall of the upper case 12 near the second end and exposed out of the upper case 12 to enhance the strength of the wireless signal. The equipment can also comprise a positioning antenna which is hidden in the equipment, so that the equipment is convenient to store and use and more attractive in appearance.

A battery 37 is secured within the lower housing 13 between the inner housing 2 and the second end of the lower housing 13 to provide power for operation of the device. The battery 37 may be a polymer lithium battery 37, and the battery 37 has a small size and a large capacity, and can continuously supply power to the device for twenty hours without an external power supply. A charging port 310 may be further provided on the housing 1 to be connected to the main circuit board 34 so that a power supply line charges the battery 37 through the charging port 310.

As shown in fig. 1 and 2, the handheld TVOC detecting device further includes an indicator lamp 38 and a power switch 39 respectively connected to the main circuit board 34. The indicator light 38 and the power switch 39 are both disposed on the same side of the upper housing 12. The indicator lights 38 can display the device operating status, wireless signal connection status, and data transmission status.

In operation, the power switch 39 is closed and the built-in polymer lithium battery 37 supplies power to the main circuit board 34. Meanwhile, the power management circuit on the main circuit board 34 supplies power to the PID sensor 32, the temperature and humidity sensor 33, and the turbofan 31. The main circuit board 34 controls reading of data of the PID sensor 32 and the temperature and humidity sensor 33 and controls the display screen 35 to display TVOC content data, meanwhile, the main circuit board 34 stores the TVOC content data and the temperature and humidity data and controls the wireless antenna 36 to transmit related data to the background server, and in addition, the main circuit board 34 also controls the indicator lamp 38 to display the working state of the wireless antenna 36 and the working state of equipment.

The embodiments of the present invention have been described with reference to the accompanying drawings, but the present invention is not limited to the above-mentioned embodiments, which are only illustrative and not restrictive, and those skilled in the art can make many forms without departing from the spirit and scope of the present invention.

Claims

1. A handheld TVOC detection device, comprising:

2. The handheld TVOC detecting device of claim 1, wherein the handheld TVOC detecting device comprises an inner shell fixed in the outer shell, the inner shell comprises an inner shell body constituting the detecting cavity, a fan bracket located at a second end of the inner shell body and used for installing the turbofan, and a PID sensor bracket and a temperature and humidity sensor bracket located in the middle of the inner shell body and arranged in sequence, wherein a first end and a second end of the inner shell body are fixedly connected with the outer shell, and the battery is fixed between the inner shell and the second end of the outer shell.

3. The handheld TVOC detection device of claim 2, wherein the inner housing body is flat at a position for arranging the PID sensor support and the temperature and humidity sensor support, the first end of the inner housing body is rectangular plate-shaped, a sinking groove for accommodating a fixing member is arranged at the top of the first end of the inner housing body, the fixing member is fixedly connected with the outer housing, a sealing gasket is arranged between the first end of the inner housing body and the outer housing, and the fixing member penetrates through the sealing gasket.

4. The handheld TVOC detecting device according to claim 3, wherein a connecting plate and a sealing pressing block embedded in the housing are sequentially arranged between the sealing gasket and the housing, the connecting plate and the sealing pressing block are provided with communication holes for communicating the air inlet and the detecting cavity, and the fixing member penetrates through the connecting plate and the sealing pressing block to be fixedly connected with the housing.

5. The handheld TVOC detecting device of claim 4, wherein the outer shell comprises an upper shell, a lower shell fastened with the upper shell and an end plate positioned at the first end of the upper shell and the lower shell and fastened with the upper shell and the lower shell, wherein the upper shell, the lower shell and the end plate constitute the accommodating cavity.

6. The handheld TVOC detecting apparatus of claim 5, wherein said air inlet is comprised of a pagoda fitting embedded in said end plate.

7. The handheld TVOC detecting device of any one of claims 3 to 6, wherein the second end of the inner housing body is rectangular plate-shaped, the second end of the inner housing body is fixedly connected with the outer housing through a fastener, and the fan bracket is fixedly connected with the inner housing body through a connector.

8. The handheld TVOC detection device according to any one of claims 3 to 6, wherein the PID sensor support includes a first pressure plate pressed on top of the PID sensor and a post arranged on the inner housing body and connected to the first pressure plate;

9. The handheld TVOC detecting device of any one of claims 1-6, wherein said wireless antenna is fixed to a sidewall of said housing proximate to said second end and exposed to said housing.

10. The handheld TVOC detection device of any one of claims 1-6, further comprising an indicator light, a power switch, and a charging port for charging said battery, each connected to said main circuit board.