Air path device for monitoring ambient air

Abstract

The utility model provides a gas circuit device for ambient air monitoring, which relates to the field of air monitoring and comprises an aluminum block and a turbofan, a channel is arranged in the aluminum block, and the turbofan is connected with the channel and sucks gas entering the channel; the air sensor is combined with the aluminum block and enters the channel to monitor gas; the aluminum block is provided with an electric heating rod and further provided with a temperature sensor used for monitoring the temperature of the aluminum block, and the temperature of the aluminum block can be adjusted. The turbofan can be used for sampling small-flow gas, a pressure reducing valve does not need to be additionally arranged for limiting airflow, when the turbofan works, the pressure of the sampled gas can be kept constant, the airflow does not need to be stabilized by the gas bin, the power of the turbofan is small, and the turbofan hardly vibrates and does not generate noise after being powered on; the turbofan is cheaper than a sampling pump, so that the cost of a sampling gas circuit can be reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to air monitoring field especially, it is a kind of gas path device for environmental air monitoring. BACKGROUND

[0002] Real-time monitoring of VOC is very necessary, only accurate monitoring can understand the real situation of atmospheric environment, make corresponding measures, reduce the harm of VOC to human body. Some VOC gas content is very small in air, ordinary equipment is difficult to monitor, so more precise instrument equipment is needed to sample and analyze air. In these devices, sampling, heating and measuring of gas are very important links, which directly determine the precision and accuracy of monitoring. Currently commonly used sampling pipeline is mostly used for gas collection by sampling pump, and the corresponding sensor is placed in the gas path when the air pump works, and the target pollutant is monitored, the sensor transmits the collected signal to the analysis instrument and carries out data analysis, to judge the content of VOC in air. But this method also has some problems. Mainly shown in: 1. Some gas collection only needs a small amount, and the sampling pump needs additional equipment to control the gas flow, which leads to complex structure and increased cost. 2. The air flow is difficult to maintain at a constant pressure during the working process of the sampling pump, and a gas tank is often added in front of the gas path to maintain stable gas flow, which increases the volume of the equipment and causes the volume of the sampling gas path to increase, which does not meet the requirements of small size and convenience. 3. Vibration will be generated during sampling of the air pump, which requires a damping structure, and the vibration is difficult to completely eliminate, which will cause the wire joint of the equipment to loosen due to vibration, affect the use, and the air pump will also produce noise during work, which will cause physical harm to the instrument operator. CONTENT OF THE UTILITY MODEL

[0003] The utility model aims at providing a kind of gas path device for environmental air monitoring to solve the above technical problems.

[0004] The utility model is used to solve the above technical problems by using the following technical solutions:

[0005] A kind of gas path device for environmental air monitoring, including aluminium block and turbine fan, there is passageway in aluminium block, turbine fan is connected with passageway, and the gas sucked into passageway is extracted;

[0006] It also includes air sensor that is combined with aluminium block and enters passageway to monitor gas;

[0007] Aluminium block is equipped with electric heating rod, aluminium block is also equipped with temperature sensor for monitoring the temperature of aluminium block, and the temperature of aluminium block can be adjusted.

[0008] Preferably, the passages are a first passage and a second passage, respectively, the second passage being configured to interface with the turbine fan, and the first passage being provided with a gas tube that is a guide structure for the gas into the passage.

[0009] Preferably, the first passage is coaxial with the second passage and has a smaller radius than the second passage.

[0010] Preferably, the air sensor is configured to enter the first passage to monitor the gas.

[0011] Preferably, the air sensor is further provided with a sensor circuit board that is signal-connected with the gas analysis instrument.

[0012] Preferably, the air sensor is provided with a first sealing ring configured to prevent the gas from overflowing out of the joint of the first passage and the air sensor.

[0013] Preferably, the turbine fan is provided with a second sealing ring configured to prevent the gas from overflowing out of the joint of the second passage and the turbine fan.

[0014] Preferably, the aluminum block is externally provided with a temperature control switch that controls the heating temperature of the electric heating rod.

[0015] The utility model discloses the beneficial effect is:

[0016] 1. In the utility model, the power source of gas sampling structure is a turbine fan, and the turbine fan is used to perform air extraction through the negative pressure generated when the turbine fan rotates. Compared with a sampling pump, the turbine fan has the following advantages: the turbine fan can be used to perform small-flow gas sampling without adding a pressure reducing valve to limit the airflow; the turbine fan can be used to keep the sampling gas pressure constant during operation, and a gas chamber is not needed to stabilize the airflow; the turbine fan has a small power and almost no vibration after being powered on, and thus does not generate noise; and the turbine fan is cheaper than the sampling pump, and thus can reduce the cost of a sampling gas circuit.

[0017] 2. In the utility model, the gas circuit device is provided with a sealing ring, and no air leakage occurs in the gas circuit during sampling, which ensures the accuracy of the volume of the sampled gas and makes the calculation results more truly reflect the VOC content in the air.

[0018] 3. In the utility model, the gas circuit structure can be used to heat, measure, and control the temperature of the gas, so that impurities and moisture in the sampled gas are removed, and the sampled gas is maintained at a constant temperature, which enables the sensor to better perform detection.

[0019] 4. In the utility model, all the components of the gas circuit structure can be mounted on the aluminum block, the sampling structure is a whole, and the aluminum alloy material can significantly reduce the weight of the device. The whole structure of the sampling gas circuit is simple and compact, which facilitates production and assembly and improves efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a structural schematic view of a gas circuit device for environmental air monitoring;

[0021] Figure 2 It is Figure 1 It is a front view of a gas circuit device for environmental air monitoring;

[0022] Figure 3 It is Figure 2 It is a structural schematic view of a middle section 1-1;

[0023] Figure 4 It is Figure 1 It is a bottom view of a gas circuit device for environmental air monitoring;

[0024] Figure 5 It is Figure 1 It is a right view of a gas circuit device for environmental air monitoring;

[0025] Figure 6 It is Figure 5 It is a structural schematic view of a middle section 2-2;

[0026] Reference signs: 1, aluminum block; 2, supporting leg; 3, turbine fan; 4, sensor circuit board; 5, temperature sensor; 6, air pipe; 7, temperature control switch; 8, electric heating rod; 9, temperature control switch support; 10, exhaust port; 11, turbine fan fixing part; 12, first channel; 13, second channel; 14, air sensor; 15, air pipe joint; 16, first sealing ring; 17, second sealing ring. DETAILED DESCRIPTION

[0027] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. The preferred embodiments of the present application are shown in the drawings. However, the present application can be realized in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terminology used in the specification of the present application herein is only for the purpose of describing specific embodiments and is not intended to limit the present application.

[0029] The specific embodiments of the present application will be described below with reference to the accompanying drawings.

[0030] Example 1

[0031] In this embodiment, a gas circuit device for environmental air monitoring is proposed, please refer toFigures 1-6 The air path device for environmental air monitoring comprises an aluminum block 1 and a turbofan 3, as shown in Figure 1 The aluminum block 1 is a rectangular block, which is provided with supporting legs 2, as shown in Figure 3 The aluminum block 1 is provided with a channel, and the turbofan 3 is arranged in the channel, as shown in Figure 1 A turbofan fixing part 11 is fixed to the lateral position of the aluminum block 1 and communicates with the channel.

[0032] Please refer to Figure 1 , Figure 3 and Figure 6 In the embodiment, the air path device for environmental air monitoring further comprises an air sensor 14 combined with the aluminum block 1 and arranged in the channel to monitor the gas.

[0033] The aluminum block 1 is further provided with an electric heating rod 8 and a temperature sensor 5 for monitoring the temperature of the aluminum block 1, and it is to be noted that the temperature of the temperature sensor 5 can be adjusted.

[0034] Please refer to Figure 3 The channel comprises a first channel 12 and a second channel 13, and the second channel 13 is arranged to connect the turbofan 3, and the first channel 12 is provided with an air pipe 6, which is a guide structure for the gas entering the channel. Of course, in order to better establish the passage relationship between the air pipe 6 and the first channel 12, an air pipe joint 15 is arranged at the port of the first channel 12, and the air pipe joint 15 connects the first channel 12 and the air pipe 6.

[0035] In the embodiment, the axis of the first channel 12 coincides with that of the second channel 13, and the radius of the first channel 12 is smaller than that of the second channel 13. Specifically, the cross-sectional size of the second channel 13 is much larger than that of the first channel 12, so that the air extraction area of the turbofan 3 is larger and more uniform, and the flowability of the air path can be improved.

[0036] Further, the air sensor 14 is arranged in the first channel 12 to monitor the gas, and as shown in Figure 1 , Figure 3 and Figure 6 The air sensor 14 is further provided with a sensor circuit board 4, which is signal connected with a gas analyzer (not shown in the figure).

[0037] In the embodiment, the air sensor 14 is provided with a first sealing ring 16 for preventing the gas from overflowing outward at the joint between the first channel 12 and the air sensor 14.

[0038] In the embodiment, the joint between the turbofan 3 and the second channel 13 is provided with a second sealing ring 17 for preventing the gas from overflowing outward at the joint between the second channel 13 and the turbofan 3.

[0039] Please refer to Figure 1 andFigure 3 The turbo fan 3 has a gas inlet and outlet, specifically, the outlet is the exhaust port 10, and the inlet is not shown in the figure, but the inlet is directly connected to the second channel 13, so that the gas in the channel can be sucked by the turbo fan 3 and discharged from the exhaust port 10 through the inlet.

[0040] As described above, the temperature of the electric heating rod 8 is adjusted, for example, by a temperature control switch 7. Figure 1 As shown, the outer wall of the aluminum block 1 has a temperature control switch support 9, and the temperature control switch support 9 has a temperature control switch 7, which controls the heating temperature of the electric heating rod 8.

[0041] Further, the circuit of the temperature control switch 7 is connected in series with the circuit of the electric heating rod 8, when the temperature sensor 5 measures a temperature exceeding the required temperature, a signal will be sent, the temperature control switch 7 will cut off the circuit, the electric heating rod 8 will stop heating, and the aluminum block 1 will start to cool down, when the temperature is lowered to a certain temperature, the temperature sensor 5 will send a signal to the temperature control switch 7 again, and the temperature control switch 7 will turn on the circuit to start heating again. In this way, the aluminum block 1 can be kept at a constant temperature, preventing the temperature from being too high to damage the VOC in the sampling gas, and preventing the temperature from being too low to cause the VOC to be adsorbed in the pipeline, so that the air sensor 14 can accurately measure the VOC content in the gas path.

[0042] The technical features of the above-described embodiments can be combined in any manner. In order to make the description simple, all possible combinations of the technical features in the above-described embodiments are not described, however, as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the present application.

[0043] The above-described embodiments only express several implementation manners of the present application, the description is more specific and detailed, but it should not be understood as a limitation on the scope of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A gas path device for environmental air monitoring, characterized by: The aluminum block is internally provided with a channel, and the turbine fan is connected with the channel and sucks the gas in the channel; The air sensor is combined with the aluminum block and enters the channel to monitor the gas; The aluminum block is provided with an electric heating rod, and is further provided with a temperature sensor for monitoring the temperature of the aluminum block, and the temperature of the aluminum block is adjustable.

2. The gas path device for ambient air monitoring according to claim 1, characterized in that: The channel is respectively a first channel and a second channel, the second channel is used for docking the turbine fan, and the first channel is provided with an air pipe which is a guide structure for the gas entering the channel.

3. An air path device for ambient air monitoring according to claim 2, characterized in that: The first channel is coaxial with the second channel, and the radius of the first channel is smaller than that of the second channel.

4. The gas path device for ambient air monitoring according to claim 2, characterized in that: The air sensor enters the first channel to monitor the gas.

5. An air path device for ambient air monitoring according to claim 4, characterized in that: The air sensor is further provided with a sensor circuit board which is signal-connected with a gas analysis instrument.

6. The gas path device for ambient air monitoring according to claim 4, characterized in that: The air sensor is provided with a first sealing ring for preventing the gas from overflowing outward at the joint of the first channel and the air sensor.

7. The gas path device for ambient air monitoring according to claim 2, characterized in that: The turbine fan is provided with a second sealing ring at the joint of the second channel and the turbine fan for preventing the gas from overflowing outward.

8. The gas path device for ambient air monitoring according to claim 1, characterized in that: The aluminum block is externally provided with a temperature control switch which controls the heating temperature of the electric heating rod.

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