CN206960437U - Gas detection device - Google Patents

Abstract

The utility model discloses a gaseous detection device relates to gaseous detection technical field, including reservoir, gaseous input mechanism, gaseous output mechanism and two above VOC sensors, gaseous input mechanism and gaseous output mechanism all communicate with the reservoir, the VOC sensor all sets up in the reservoir. The utility model makes the gas in the gas storage chamber in a flowing state through the gas input mechanism and the gas output mechanism, and the active sampling detection can ensure that the VOC sensor in the gas storage chamber is not influenced by other external factors except pollution sources of the environment, thereby improving the detection accuracy; meanwhile, a plurality of VOC sensors are adopted for simultaneous detection, and the inaccuracy caused by the difference of the sensors can be reduced by averaging the collected data of multiple groups, so that the accuracy of gas detection is further improved.

Description

Gas detection device

technical field

The utility model relates to the technical field of gas detection, in particular to a gas detection device.

Background technique

At present, with the continuous development of society, people's awareness of environmental protection is gradually enhanced, and people's requirements for air quality are getting higher and higher. Most of the portable indoor VOCs/formaldehyde meters on the market today are basically only equipped with a single sensor, and the sensor is directly in contact with the surrounding ambient air for sampling, which is a relatively passive sampling method. Therefore, in addition to the pollution concentration of the surrounding environment, the size of the air flow near the sensor will also affect the signal received by the sensor, which will easily lead to unstable received signal and thus affect the analysis results. At the same time, all the indoor organic gaseous substance sensors currently on the market also have instability problems, and the sensors produced by the same brand and the same batch will have differences. These reasons lead to inaccurate analysis results.

Utility model content

The utility model provides a gas detection device, which aims to solve the technical problems in the above-mentioned prior art, and can improve the accuracy of detection of the concentration of organic gaseous substances.

In order to solve the problems of the technologies described above, the technical solution adopted by the utility model is:

A gas detection device, comprising a gas storage chamber, a gas input mechanism, a gas output mechanism and more than two VOC sensors, the gas input mechanism and the gas output mechanism are both connected to the gas storage chamber, and the VOC sensors are all arranged in the gas storage indoor.

Preferably, there are three VOC sensors.

Further, a control box is also included, and the VOC sensor, the gas input mechanism and the gas output mechanism are all connected to the control box.

Preferably, a display screen is provided on the control box.

Preferably, both the gas input mechanism and the gas output mechanism are air pumps.

Further, the air pump is a quantitative air pump.

Preferably, the control box is also provided with an alarm.

Further, the gas storage chamber, the gas input mechanism, the gas output mechanism and the VOC sensor are all arranged in the casing.

The beneficial effects produced by adopting the above-mentioned technical solution are: the utility model makes the gas in the gas storage chamber flow through the gas input mechanism and the gas output mechanism, and this active sampling detection can ensure that the VOC sensor in the gas storage chamber is not affected by the environment except pollution sources. Influenced by other external factors, so as to improve the detection accuracy; at the same time, several VOC sensors are used for simultaneous detection, and the average value of multiple sets of data collected can reduce the inaccuracy caused by the difference of the sensor itself, and further improve the accuracy of gas detection Spend.

Description of drawings

Below in conjunction with accompanying drawing and specific embodiment, the utility model is described in further detail.

Fig. 1 is a schematic structural diagram of a gas detection device provided by an embodiment of the present invention.

Detailed ways

Below in conjunction with the accompanying drawings in the utility model embodiment, the technical solution in the utility model embodiment is clearly and completely described, obviously, the described embodiment is only a part of the utility model embodiment, rather than all implementation example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Referring to Fig. 1, a gas detection device provided by the utility model includes a gas storage chamber, a gas input mechanism, a gas output mechanism and more than two VOC sensors, the gas input mechanism and the gas output mechanism are both connected to the gas storage chamber, The VOC sensors are all arranged in the gas storage chamber. Through the gas input mechanism and the gas output mechanism, the gas in the gas storage chamber is in a flowing state. This active sampling and detection can ensure that the VOC sensor in the gas storage chamber is not affected by external factors other than the environment, thereby improving the detection accuracy; at the same time Using several VOC sensors to detect at the same time, taking the average value of multiple sets of collected data can reduce the inaccuracy caused by the difference of the sensor itself, and further improve the accuracy of gas detection.

Wherein, three VOC sensors can be selected. In view of the instability of the VOC sensor itself, each batch of sensors is compared and classified according to the data analysis results, and divided into three categories: A, B, and C; Each of the three VOC sensors is used in this utility model. The three VOC sensors sense the gas pumped into the gas storage chamber and convert it into an electrical signal for output respectively. The three sensors have three sets of data, and the average value is taken to calculate the VOCs concentration, thereby increasing the VOCs concentration. detection accuracy.

As a further preferred solution, a control box is also included, and the VOC sensor, the gas input mechanism and the gas output mechanism are all connected to the control box. The automatic control of the VOC sensor, gas input mechanism and gas output mechanism can be realized through the control box. At the same time, the average value of the detection values of multiple VOC sensors can be calculated through the calculation program in the control box, and then intuitively displayed on the display screen on the control box. It can be concluded that there is no need for manual calculation, it is intuitive and fast, and it also reduces the probability of calculation errors.

In a preferred embodiment of the present utility model, both the gas input mechanism and the gas output mechanism are air pumps. The air pump used can be a quantitative air pump. Two quantitative air pumps are used to keep the airflow entering the air storage chamber quantitatively. One quantitative pump is used to draw the surrounding air to the air storage chamber, and the other pumps the air into the air storage chamber and has been done. The gas for data analysis is pumped out to realize the flow detection of the air in the gas storage chamber. The quantitative air pump pumps the surrounding quantitative air in the ambient air to the air storage chamber to analyze the output data of the VOC sensor, and then pumps it away by another quantitative air pump, and so on.

In a specific embodiment of the present utility model, the control box is also provided with an alarm. According to actual needs, the parameter value can be set in the control box. When the gas pollution degree reaches the upper limit of the parameter value, an alarm will be issued to prompt Excess gas pollution.

For easy portability, the gas storage chamber, gas input mechanism, gas output mechanism and VOC sensor can all be set in the casing, and the corresponding connectors and display screens are set on the casing to facilitate the connection of power supply and observation data.

To sum up, the utility model has the advantages of simple structure, convenient operation, and high gas detection accuracy. Two quantitative air pumps are used to detect the gas flow state in the gas storage chamber, and three VOC sensors are used to sense the gas flow state pumped into the gas storage chamber. The gas is converted into electrical signals to output 3 sets of data respectively, and the average value is taken to calculate the VOCs concentration, which reduces the inaccuracy caused by the difference of the sensor itself, so that the VOC sensor is not affected by other external factors in the environment except pollution sources, and further improves Accuracy of gas detection.

In the above description, a lot of specific details have been set forth in order to fully understand the utility model, but the utility model can also be implemented in other ways that are different from those described here, and those skilled in the art can Under the circumstances, similar promotion is done, so the utility model is not limited by the specific embodiments disclosed above.

Claims (8)

1. A kind of 1. gas-detecting device, it is characterised in that：Including air storage chamber, gas input mechanism, gas output mechanism and two Above VOC sensors, the gas input mechanism and gas output mechanism are connected with air storage chamber, and the VOC sensors are all provided with Put in air storage chamber.
2. 2. gas-detecting device according to claim 1, it is characterised in that：The VOC sensors are three.
3. 3. gas-detecting device according to claim 2, it is characterised in that：Also include control cabinet, the VOC sensors, Gas input mechanism and gas output mechanism are connected with control cabinet.
4. 4. gas-detecting device according to claim 3, it is characterised in that：The control cabinet is provided with display screen.
5. 5. gas-detecting device according to claim 1, it is characterised in that：The gas input mechanism and gas export machine Structure is air pump.
6. 6. gas-detecting device according to claim 5, it is characterised in that：The air pump is certain amount of air pump.
7. 7. gas-detecting device according to claim 3, it is characterised in that：The control cabinet is additionally provided with alarm.
8. 8. gas-detecting device according to claim 4, it is characterised in that：The air storage chamber, gas input mechanism, gas Output mechanism and VOC sensors are arranged in housing.