Gas collection device for multifunctional automobile exhaust detection analyzer

Abstract

A gas collection device used by a multifunctional automobile exhaust detection analyzer comprises a power supply module, a filtering device, a cooling device, a peristaltic pump, a pressure sensor, an electric proportional valve and a sampling pump, the filtering device comprises a filter cartridge, a filter screen and a filter cartridge cover, and the cooling device comprises a shell and a semiconductor refrigeration mechanism. An exhaust pipe B of the cooling equipment is connected with the gas inlet end of the automobile exhaust detection analyzer body, the exhaust end of the automobile exhaust detection analyzer body is connected with an inlet of the electric proportional valve, an outlet of the electric proportional valve is connected with an inlet of the sampling pump, and a gas inlet pipe of the pressure sensor P is installed on the exhaust pipe B. The probability that particulate matter blocks a subsequent pipeline and the interior of the automobile tail gas detection analyzer body is reduced, moisture in tail gas can be cooled, the temperature of the tail gas can be reduced, the flow and pressure of the tail gas entering the interior of the automobile tail gas detection analyzer body are stable, and the accuracy of tail gas data detected by the tail gas detection analyzer is guaranteed as much as possible. The device has a good application prospect.

Description

Technical Field

[0001] This utility model relates to the field of detection auxiliary equipment technology, and in particular to a gas collection device used in a multifunctional automobile exhaust gas detector and analyzer. Background Technology

[0002] Automobiles using traditional energy sources (such as gasoline, diesel, and natural gas) produce large amounts of gaseous pollutants, including carbon monoxide (CO), nitrogen monoxide (NO), nitrogen dioxide (NO2), methane (CH4), propane (C3H8), and carbon dioxide (CO2), during operation. Therefore, it is crucial to minimize the emission of these gaseous pollutants during engine development, maintenance, and throughout the vehicle's lifespan. Thus, detecting vehicle emissions using exhaust gas analyzers and addressing exhaust malfunctions promptly are essential for reducing polluting emissions.

[0003] Existing exhaust gas analyzers primarily employ non-dispersive infrared absorption (NDIR), high-frequency ionization (HFID), chemiluminescence immunoassay (CLD), quick-close laser-coupled system (QCL), and Fourier transform infrared spectroscopy (FTIR) methods to detect vehicle exhaust gases. While these analyzers meet certain testing requirements, they connect their sampling tubes directly to the vehicle's engine exhaust pipe. Water vapor, temperature, and pressure in the exhaust gases can interfere with the analyzer's operation, potentially leading to inaccurate data. Consequently, if the vehicle's exhaust emissions fail to meet standards, the analyzer may not detect the problem, resulting in untreated engine exhaust being released directly into the atmosphere and polluting the air. Utility Model Content

[0004] To overcome the drawbacks of existing exhaust gas analyzers, which connect their sampling tubes directly to the vehicle's engine exhaust pipe, allowing water vapor, temperature, and pressure in the exhaust gas to interfere with the analyzer's operation and potentially lead to errors in the detected exhaust gas data, this invention provides a multi-functional gas collection device for use with an exhaust gas analyzer. This device, used in conjunction with relevant mechanisms, effectively removes water vapor from the engine exhaust gas and reduces its pressure and temperature, thus maximizing the accuracy of the exhaust gas data detected by the analyzer.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A gas collection device for a multifunctional automotive exhaust gas detector includes a power module, a filtration device, a cooling device, a peristaltic pump, a pressure sensor, an electric proportional valve, and a sampling pump. The filtration device includes a filter cartridge, a filter screen, and a filter cartridge cover. An intake pipe A is installed on the outside of the filter cartridge cover, and an exhaust pipe A is installed on the outside of the filter cartridge. A limiting seat is installed inside the filter cartridge, and the filter screen is installed inside the filter cartridge. The filter cartridge cover and the filter cartridge are connected by threads. The cooling device includes a housing and a semiconductor cooling mechanism. The housing has an opening at the top, and the semiconductor cooling mechanism is installed inside the opening. An intake pipe B and an exhaust pipe B are installed on both sides of the housing, respectively. A drain pipe is installed at the bottom of the housing and is connected to the liquid inlet of the peristaltic pump. The exhaust pipe B is connected to the intake end of the automotive exhaust gas detector, and the exhaust pipe A is connected to the intake pipe B. The exhaust end of the automotive exhaust gas detector is connected to the inlet of the electric proportional valve, and the outlet of the electric proportional valve is connected to the inlet of the sampling pump. The intake pipe of the pressure sensor P is installed on the exhaust pipe B, and the signal input end of the electric proportional valve is electrically connected to the signal output end of the pressure sensor.

[0007] Furthermore, the cold end of the semiconductor cooling mechanism is located inside the housing, and the hot end is located outside the housing.

[0008] Furthermore, the power module can also be replaced by a storage battery.

[0009] Furthermore, the sampling pump is a negative pressure fan.

[0010] Furthermore, the pressure sensor can also be replaced by a flow meter.

[0011] Compared with the prior art, the advantages of this utility model are: (1) When used in conjunction with the exhaust gas detector and analyzer, during the detection, the front end of the intake pipe A is fitted with a high-temperature resistant hose, and then the front end of the hose is fitted into the exhaust pipe of the vehicle engine. The filter can effectively filter out particulate matter in the exhaust gas, reducing the probability of particulate matter clogging the subsequent pipeline and the inside of the vehicle exhaust gas detector and analyzer; (2) The cooling device can cool the moisture in the exhaust gas and reduce the exhaust gas temperature. The collected wastewater is discharged through the peristaltic pump, and the pressure signal detected by the pressure sensor can be synchronously output to the signal input terminal of the electric proportional valve. The electric proportional valve can adjust its valve core opening to be smaller or larger when the exhaust gas pressure is relatively large or relatively small. In this way, the exhaust gas flow rate extracted by the sampling pump is relatively stable, ensuring that the exhaust gas flow rate and pressure entering the inside of the vehicle exhaust gas detector and analyzer are stable, and ensuring the accuracy of the exhaust gas data detected by the exhaust gas detector and analyzer as much as possible. Based on the above, this utility model has good application prospects. Attached Figure Description

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0014] Figure 2 This is the circuit diagram of this utility model. Detailed Implementation

[0015] Figure 1 , 2 As shown, a gas collection device used in a multifunctional automotive exhaust gas detector and analyzer includes a power module W1 (a finished product of an AC 220V to DC 12V power module), a filter, a cooling device, a peristaltic pump M1, a pressure sensor P (model HK18-A16C; with two power input terminals and one signal output terminal; the higher the detected pressure, the higher the output voltage signal, and vice versa), and an electric proportional valve DC1 (model VB3100; with two power input terminals and one signal input terminal; the higher the input voltage signal, the smaller the valve core opening degree, and vice versa). The greater the degree of filtration, the more likely it is to be a sample pump M2. The filtration device includes a filter cylinder 101, a filter screen 102, and a filter cylinder cover 103. The filter cylinder cover 103 has an opening in the middle, and an air inlet pipe A104 is welded to the left outer side of the opening. The filter cylinder cover 103 has an internal thread on the right inner side, and the filter cylinder 101 has an external thread on the left outer side. An exhaust pipe A105 communicating with the interior of the filter cylinder 101 is welded to the middle of the right outer side. An annular hollow limiting seat 106 is welded to the middle of the inner side of the filter cylinder. The filter screen 102 (made of multiple layers of stainless steel filter screen sheets) is installed inside the filter cylinder 101 on the left side, and its right end is connected to the limiting seat 106. The left side of the filter cartridge cover 103 and the left side of the filter cartridge 101 are connected by threads. The cooling device includes a hollow shell 21 and a semiconductor refrigeration mechanism BT. The upper rear end of the shell 21 has a rectangular opening. The semiconductor refrigeration mechanism BT (a finished semiconductor refrigeration module with a power of 150W and a working voltage of DC 12V) is sealed and fixedly installed in the opening. An air inlet pipe B22 and an exhaust pipe B23, which communicate with the interior, are respectively welded to the middle of the left and right outer ends of the shell. A drain pipe 24 is welded to the middle of the lower front end of the shell 21. The drain pipe 24 and the liquid inlet end of the peristaltic pump M1 (the liquid inlet end of the peristaltic pump M1) are connected. The outlet and wastewater tank are connected via pipes; the exhaust pipe B23 and the inlet of the vehicle exhaust gas analyzer body 3 are connected via pipes; the exhaust pipe A105 and the inlet pipe B22 are connected; the exhaust end of the vehicle exhaust gas analyzer body 3 and the inlet of the electric proportional valve DC1 are connected via pipes; the outlet of the electric proportional valve DC1 and the inlet of the sampling pump M2 are connected via pipes; the upper end of the exhaust pipe B23 has an opening, and the inlet pipe of the pressure sensor P is sealed and installed in the opening and communicates with the exhaust pipe B23; the power module W1 is installed in the electrical control box of the vehicle exhaust gas analyzer body. The pressure sensor P can also be replaced by a flow meter.

[0016] Figure 1 , 2 As shown, the cold end of the semiconductor cooling mechanism BT is located inside the housing, and the hot end is located outside the housing. The power input terminals of the sampling pump M2 and the peristaltic pump M1 (100W) are connected in series via power switches S1 and S2 and to a 220V AC power supply via wires; the power module W1 can also be replaced by a 12V battery. The sampling pump M2 is a negative pressure fan (300W). The power input terminal of the power module W1 and the two poles of the 220V AC power supply are connected via wires. The power output terminals 3 and 4 of the power module W1 are connected to the power input terminals 1 and 2 of the pressure sensor P, the power input terminals 1 and 2 of the electric proportional valve DC1, and the two ends of the power input of the semiconductor cooling mechanism BT of the cooling equipment via wires. The signal input terminal 3 of the electric proportional valve DC1 and the signal output terminal 3 of the pressure sensor P are connected via wires.

[0017] Figure 1 , 2 As shown, this novel collaborative exhaust gas analyzer 3 is used in the following manner: During testing, a high-temperature resistant flexible tube (with an outer diameter smaller than the inner diameter of the exhaust pipe) is inserted into the front end of the intake pipe A104. Then, the front end of the flexible tube is placed inside the exhaust pipe of the vehicle engine. During testing, the power switch of the sampling pump M2 is turned on, and the sampling pump M2 is powered on to generate negative pressure. In this way, the exhaust gas in the vehicle's exhaust pipe will be filtered through the filter screen 102 of the filter device and then enter the cooling mechanism. Specifically, the filter device can effectively filter out particulate matter in the exhaust gas, reducing the probability of particulate matter clogging subsequent pipes and the interior of the vehicle exhaust gas analyzer 3. The semiconductor refrigeration mechanism BT of the cooling device can cool the moisture in the exhaust gas (condensing it into water that falls into the lower end of the outer casing 21) and reduce the temperature of the exhaust gas. The collected wastewater is discharged through the peristaltic pump M1 (whose power switch is turned on during operation). After being cooled and dehydrated by the cooling device, the exhaust gas enters the vehicle exhaust gas analyzer 3. The exhaust gas analyzer 3 analyzes the incoming exhaust gas to obtain various data in the exhaust gas, and then discharges it through its exhaust pipe (discharged to the atmosphere through the sampling pump). In this new invention, when exhaust gas flows into and out of the pressure sensor P, it outputs a dynamically changing voltage signal to the signal input terminal of the electric proportional valve DC1. When the exhaust gas flow is too large and the voltage signal input to the electric proportional valve DC1 is relatively high, the valve core of the electric proportional valve DC1 closes more fully, resulting in less exhaust gas flowing into and out of the exhaust gas analyzer body and less exhaust gas being discharged by the sampling pump M2. Conversely, when the exhaust gas flow is too small and the voltage signal input to the electric proportional valve DC1 is relatively low, the valve core of the electric proportional valve DC1 closes less fully, resulting in more exhaust gas flowing into and out of the exhaust gas analyzer body and more exhaust gas being discharged by the sampling pump M2. In this way, the amount of exhaust gas entering the exhaust gas analyzer body remains relatively constant, and the exhaust gas flow and pressure entering the exhaust gas analyzer body are stable, thus ensuring the accuracy of the exhaust gas data detected by the exhaust gas analyzer as much as possible.

[0018] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model.

[0019] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A gas collection device for use with a multi-functional automobile exhaust detection analyzer, comprising a power module, a filtering device, a cooling device, a peristaltic pump, a pressure sensor, an electric proportional valve, a sampling pump, characterized in that The filter device comprises a filter cylinder, a filter screen, a filter cylinder cover, an air inlet pipe A installed outside the filter cylinder cover, an air outlet pipe A installed outside the filter cylinder, a limiting seat installed inside the filter cylinder, the filter screen installed in the filter cylinder, and the filter cylinder cover and the filter cylinder connected through threads; the cooling device comprises a shell and a semiconductor refrigeration mechanism, the shell has an opening at the upper part, the semiconductor refrigeration mechanism is installed in the opening, air inlet pipe B and air outlet pipe B are installed on the two sides of the shell respectively, a drain pipe is installed at the lower end of the shell, and the drain pipe is connected with the liquid inlet end of the peristaltic pump; the air outlet pipe B is connected with the air inlet end of the automobile exhaust detection analyzer body, the air inlet pipe B is connected with the air outlet pipe A, the air outlet end of the automobile exhaust detection analyzer body is connected with the inlet of the electric proportional valve, and the outlet of the electric proportional valve is connected with the inlet of the sampling pump; the air inlet pipe of the pressure sensor P is installed on the air outlet pipe B, and the signal input end of the electric proportional valve is electrically connected with the signal output end of the pressure sensor.

2. The gas collecting device for use in a multifunctional automobile exhaust detection analyzer according to claim 1, characterized in that, The cold end of the semiconductor refrigeration mechanism is located in the shell, and the hot end is located outside the shell.

3. The gas collecting device for use in a multifunctional automobile exhaust detection analyzer according to claim 1, characterized in that, The power module can also use a storage battery instead.

4. The gas collecting device for use in a multifunctional automobile exhaust detection analyzer according to claim 1, characterized in that, The sampling pump is a negative pressure fan.

5. The gas collecting device for use in a multifunctional automobile exhaust detection analyzer according to claim 1, characterized in that, The air pressure sensor can also use a flow meter instead.

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