CN112211706A - Tail gas detection equipment and control method - Google Patents
Tail gas detection equipment and control method Download PDFInfo
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- CN112211706A CN112211706A CN202011126417.4A CN202011126417A CN112211706A CN 112211706 A CN112211706 A CN 112211706A CN 202011126417 A CN202011126417 A CN 202011126417A CN 112211706 A CN112211706 A CN 112211706A
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- 238000001514 detection method Methods 0.000 title claims abstract description 157
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000006243 chemical reaction Methods 0.000 claims abstract description 57
- 238000001816 cooling Methods 0.000 claims description 81
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 39
- 238000010248 power generation Methods 0.000 claims description 36
- 239000000498 cooling water Substances 0.000 claims description 24
- 238000009434 installation Methods 0.000 claims description 6
- 230000003197 catalytic effect Effects 0.000 claims description 4
- 230000003584 silencer Effects 0.000 claims description 4
- 238000011897 real-time detection Methods 0.000 claims description 3
- 238000009423 ventilation Methods 0.000 claims description 3
- 239000002699 waste material Substances 0.000 abstract description 5
- 239000007789 gas Substances 0.000 description 81
- 230000000694 effects Effects 0.000 description 8
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 4
- 230000017525 heat dissipation Effects 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- 230000005678 Seebeck effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- DOTMOQHOJINYBL-UHFFFAOYSA-N molecular nitrogen;molecular oxygen Chemical compound N#N.O=O DOTMOQHOJINYBL-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N5/00—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy
- F01N5/02—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy the devices using heat
- F01N5/025—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy the devices using heat the device being thermoelectric generators
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
The invention provides a tail gas detection device and a control method, wherein the tail gas detection device comprises a thermoelectric conversion device, a data processing device, a detection device and a clamping device; the detection device is connected with the data processing device; the data processing device is positioned above the thermoelectric conversion device; the data processing device and the thermoelectric conversion device are fixed through a clamping device; by arranging the thermoelectric conversion device, the thermoelectric generation can be carried out by utilizing the heat released when the tail gas is discharged; the thermoelectric conversion device is used for supplying power to the whole detection equipment, and the whole detection equipment does not need an external power supply, so that resource waste is avoided; detecting the tail gas by arranging a detection device; the automobile exhaust emission detection can be carried out in real time, so that the detection result is accurate; through setting up data processing apparatus, can feed back the exhaust emission condition to the user like this and can take notes the emission condition of tail gas simultaneously, can in time know the exhaust emission condition like this, can in time arrange the vehicle to maintain after the user discovers the problem like this.
Description
Technical Field
The invention relates to the technical field of automobile exhaust treatment, in particular to exhaust detection equipment and a control method.
Background
The workshop is directly discharged to the tail gas that produces when carrying out automobile exhaust and detecting, and is in large quantity and concentrated, and on the one hand to the staff's influence of operation in the workshop great, harm health, on the other hand, direct exhaust automobile exhaust also has certain influence to the surrounding environment. The thermoelectric generator is a power generation device which directly converts heat energy into electric energy by utilizing the Seebeck effect. If the hot surface of the thermoelectric monomer inputs heat flow and a temperature difference is established between the hot end and the cold end of the thermoelectric monomer, current flows through a circuit, and a large amount of waste heat is generated in tail gas during tail gas detection, so that the thermoelectric generator generates stable current.
In chinese application No. 201611018399.1; the patent document with publication No. 2018.4.24 discloses an automobile exhaust thermoelectric power generation system, a cooling method thereof, and a method for controlling exhaust flow, wherein a heat collecting system controls the temperature of the hot end of a thermoelectric power generation device through an electronic control unit so as to realize the diversion of exhaust, the thermoelectric power generation device generates electric energy by forming temperature difference at the two ends of a thermoelectric power generation material (the hot end formed by the exhaust and the cold end formed by cooling the thermoelectric power generation material by the cooling system), the cooling system realizes the cooling of the cold end through air cooling and water cooling, a temperature protection system protects the thermoelectric power generation system when a valve connected with a condensing pipe is completely opened (the electronic control unit controls the closing of a valve connected with a heat collector), a DC-DC control circuit integrates unstable open-circuit voltage generated by the thermoelectric power generation device so as to obtain constant output electric power and charges a storage battery, the storage battery supplies power to the vehicle-mounted electric appliance when necessary.
However, the document does not describe how the exhaust gas is discharged after entering the exhaust gas thermoelectric generation system; tail gas which cannot be discharged in time is accumulated in the tail gas temperature difference power generation system, so that the tail gas can oppress the tail gas temperature difference power generation system; thus accelerating the damage of the tail gas temperature difference power generation system; meanwhile, the valve C is connected with the condensing pipe; the condenser pipe, the water cooling pipeline and the cold end of the temperature difference power generation device are connected; when the valve C is opened, tail gas is discharged into the condenser pipe; and then the tail gas can enter the water cooling channel; the cooling effect of the water cooling channel on the cold end of the thermoelectric power generation device can be influenced.
Disclosure of Invention
The invention provides the tail gas detection equipment and the control method, which can discharge tail gas in time, have no influence on the cooling effect when discharging the tail gas, have good heat dissipation effect and can detect the concentration of the tail gas emission.
In order to achieve the purpose, the technical scheme of the invention is as follows: the tail gas detection equipment comprises a thermoelectric conversion device, a data processing device, a detection device, a clamping device and a detection device for detecting the exhaust concentration of tail gas; the detection device is connected with the data processing device; the data processing device is positioned above the thermoelectric conversion device; the data processing device and the thermoelectric conversion device are fixed through a clamping device; the data processing device comprises a processor, and the detection device is in signal connection with the processor;
the thermoelectric conversion device comprises an air duct, a heat collecting device, a cooling device and a thermoelectric generation piece; the thermoelectric generation piece is arranged between the heat collection device and the cooling device and is connected with the heat collection device and the cooling device; the heat collecting device is arranged between the air inlet pipeline and the air outlet pipeline and is connected with the air inlet pipeline and the air outlet pipeline; one end of the bypass pipeline is connected with the air inlet pipeline; the other end of the bypass pipeline is connected with the air outlet pipeline; an air inlet valve is arranged between the bypass pipeline and the air inlet pipeline;
the heat collecting device is provided with a flow guide piece, and the flow guide piece is provided with an air outlet space; the cooling device is provided with a guide plate, a water inlet and a water outlet; the water inlet and the water outlet are connected with an automobile cooling water tank, and a cooling channel is formed on the flow guide plate; the cooling channel is respectively connected with the water inlet and the water outlet
Through the arrangement, the thermoelectric conversion device is arranged, so that thermoelectric power generation can be carried out by utilizing heat released when tail gas is discharged; the thermoelectric conversion device is used for supplying power to the whole detection equipment, so that the whole detection equipment does not need to be externally connected with a power supply, and resource waste is avoided; detecting the concentrations of carbon monoxide, carbon dioxide, hydrocarbons and nitrogen oxides in the tail gas by a detection device for detecting the emission concentration of the tail gas; the automobile exhaust emission detection can be carried out in real time, so that the detection result is accurate; by arranging the data processing device, the current exhaust emission condition can be fed back to a user, and the exhaust emission condition can be recorded at the same time, so that the exhaust emission condition can be known in time, and the user can arrange a vehicle for maintenance in time after finding a problem; by arranging a clamping device; the data processing device can be stably connected with the thermoelectric conversion device;
because the bypass channel is arranged between the air inlet pipeline and the air outlet pipeline, when the temperature of the temperature difference power generation sheet in the hot spot conversion device is too high, tail gas can be discharged through the bypass pipeline, and the tail gas discharge cannot be influenced;
the heat collecting device is arranged as a heat source of the thermoelectric conversion device; one end of the air outlet space close to the air inlet pipeline is larger than one end of the air outlet channel far away from the air inlet pipeline, so that the air resistance of tail gas passing through the heat collecting device can be reduced; the power generation efficiency of the thermoelectric conversion device is improved;
a cooling device is arranged to be used as a cold source of the thermoelectric conversion device; through setting up water inlet and delivery port, make things convenient for cooling device to be connected with the coolant tank of car, utilize the discarded cooling water in the coolant tank of car to dispel the heat collector, when the energy can be saved, the radiating effect is good.
Further, the data processing device comprises a battery, a temperature detection device and an installation plate; the battery, the temperature detection device and the detection device are arranged on the mounting plate; the detection device comprises a first detection device, a second detection device and a detection connecting piece; the first detection device and the second detection device are both arranged on the mounting plate and are connected with the processor; the detection connecting piece is connected with the first detection device, the second detection device and the air outlet pipeline; the detection connecting piece is provided with a first port, a second port and a third port; the first port, the second port and the third port are communicated with each other; the first port is provided with a detection valve; the first port is connected with the air outlet pipeline through a detection valve; the second port is connected with the first detection device; the third port is connected with the second detection device.
According to the arrangement, the detection device can be stably installed by arranging the installation plate; storing electricity generated by the thermoelectric conversion device by providing a battery; through setting up first detection device and second detection device, can carry out comprehensive detection to the concentration of the tail gas that discharges out like this.
Further, the flow guide piece comprises a first flow guide piece and a second flow guide piece, and the first flow guide piece and the second flow guide piece are symmetrically arranged around the ventilation pipeline; an air outlet space is formed between the first flow guide part and the second flow guide part; one end of the air outlet space close to the air inlet pipeline is larger than one end of the air outlet space far away from the air inlet pipeline.
According to the arrangement, the first diversion part and the second diversion part are arranged, so that tail gas entering the heat collection device can rapidly flow to the gas outlet pipeline; meanwhile, an air outlet channel which is larger than one end of the air outlet channel far away from the air inlet pipeline and close to one end of the air inlet pipeline is arranged; further reducing the air resistance of the tail gas when the tail gas passes through the heat collecting device.
Further, the guide plates comprise a first guide plate and a second guide plate, and the first guide plate and the second guide plate are arranged on the cooling device in an staggered mode; the first guide plate is connected with one side of the cooling device close to the air inlet pipeline, the second guide plate is connected with one side of the cooling device far away from the air inlet pipeline, and a cooling channel is formed between the first guide plate and the second guide plate.
Above setting, through setting up first guide plate and first guide plate, can provide the guide effect for rivers like this, through the cooling channel that takes shape, extension rivers are at the inside flow time of cooling device, and cooling device surface temperature is even like this.
Further, a control method of the exhaust gas detection device comprises the following steps:
1) pre-mounting a detection device; starting the vehicle;
2) the automobile exhaust enters the heat collecting device to provide a heat source for the thermoelectric conversion device, and the automobile cooling water enters the cooling device to provide a cold source for the thermoelectric conversion device;
3) generating current by the thermoelectric generation sheet; the current charges the battery; the battery provides power for the tail gas detection equipment, and the first detection device and the second detection device are started;
4) starting a temperature detection device, and detecting the temperature of the thermoelectric generation piece by the temperature detection device; when the temperature of the thermoelectric generation piece is detected to reach the opening standard of the air inlet valve; the processor opens the air inlet valve; the automobile exhaust flows to the air outlet pipeline through the bypass pipeline;
5) automobile exhaust flows into through the pipeline of giving vent to anger and detects the connecting piece, and first detection device and second detection device carry out real-time detection to automobile exhaust.
Further, in step 1), the pre-installation detection device specifically includes:
2.1) connecting an air inlet pipeline with an exhaust pipe at the rear section of the automobile three-way catalytic device; the air outlet pipeline is connected with an exhaust pipe at the front section of the automobile silencer;
2.2) the water inlet and the water outlet of the cooling device are respectively connected with a cooling water tank of the automobile.
Further, the step 4) is specifically as follows: when the temperature of the thermoelectric generation piece is detected to reach the opening standard of the air inlet valve; the processor opens the air inlet valve; the automobile exhaust flows to the air outlet pipeline through the bypass pipeline; when the temperature of the thermoelectric generation piece is detected to be not equal to the opening standard of the air inlet valve; the automobile exhaust flows to the air outlet pipeline through the air inlet pipeline;
the temperature of thermoelectric generation piece reaches the opening standard of air inlet valve, specifically does: the instant temperature of the thermoelectric generation piece is larger than the maximum bearing temperature of the thermoelectric generation piece.
Further, in step 2, specifically: and cooling water in the cooling water tank enters the water inlet, circulates in the cooling channel and then flows back to the cooling water tank from the water outlet.
Further, in step 2, specifically: the automobile exhaust enters the heat collecting device through the air inlet pipeline; through the outlet space and then out of the outlet duct.
According to the driving method, the tail gas discharged by the automobile is utilized to provide a heat source for the thermoelectric conversion device through the thermoelectric conversion device; cooling water of an automobile cooling water tank is used for providing a cold source for the thermoelectric conversion device to perform thermoelectric power generation; supplying power to the whole tail gas detection device; therefore, the whole tail gas detection device does not need to be externally connected with a power supply, and resource waste is avoided; meanwhile, even if the vehicle is flamed out, the tail gas still passes through the tail gas emission detection equipment and is then discharged out of the vehicle; at this time, the battery still supplies power to the whole tail gas emission detection equipment, so that the concentration of the tail gas can still be detected, and the detection reliability is improved; the problem that the detection device cannot detect the tail gas which is not arranged and discharged in time after the automobile is flamed out is avoided;
detecting the temperature of the thermoelectric power generation piece through a temperature detection device; when the instant temperature of the thermoelectric power generation piece is detected to be larger than the maximum bearing temperature of the thermoelectric power generation piece, the air inlet valve is opened; tail gas flows to an air outlet pipeline through a bypass pipeline; the tail gas still enters the heat collecting device to enable the thermoelectric conversion module to continuously generate power when the temperature borne by the thermoelectric generation piece is too high, so that the thermoelectric generation piece is prevented from being damaged; therefore, the service life of the thermoelectric power generation piece can be prolonged.
Drawings
Fig. 1 is a perspective view of an exhaust gas detection device according to the present invention.
Fig. 2 is another perspective view of the exhaust gas detecting device according to the present invention.
Fig. 3 is a side view of the exhaust gas detecting device of the present invention.
Fig. 4 is a side view of a cooling device of the exhaust gas detecting device according to the present invention.
Fig. 5 is a cross-sectional view a-a of fig. 4.
FIG. 6 is a side view of a heat collecting device of the exhaust gas detecting device according to the present invention.
Fig. 7 is a cross-sectional view B-B of fig. 6.
FIG. 8 is a schematic view showing a structure in which a heat collecting device, a cooling device, and thermoelectric generation chips are connected to a battery according to the present invention.
Fig. 9 is a flowchart of the driving method of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1-9; an exhaust gas detection device; the device comprises a thermoelectric conversion device 1, a data processing device 2, a clamping device 4 and a detection device 3 for detecting the side-emission concentration of the tail gas; the detection device 3 is connected with the data processing device 2; the data processing device 2 is located above the thermoelectric conversion device 1; the data processing device 2 and the thermoelectric conversion device 1 are fixed by a clamp device 4. The data processing device 2 includes a battery 22, a processor (not shown in the figure), a mounting plate 21, and a temperature detection device (not shown in the figure); the battery 22, the processor, the detection device 3 and the temperature detection device are all arranged on the mounting plate 21; the battery 22 is connected to the thermoelectric conversion device 1 through a power supply line (not shown).
The thermoelectric conversion device 1 comprises a ventilation pipeline 11, a heat collecting device 12, a cooling device 13 and a thermoelectric generation piece 14; the heat collecting device 12 is connected with the cooling device 13, and the thermoelectric generation piece 14 is arranged between the heat collecting device 12 and the cooling device 13; the vent pipeline 11 comprises an air inlet pipeline 111, an air outlet pipeline 112 and a bypass pipeline 113, the air inlet pipeline 111 is connected with an exhaust pipe at the rear section of the automobile three-way catalytic device, and the air outlet pipeline 112 is connected with an exhaust pipe at the front section of the automobile silencer; the heat collecting device 12 is disposed between the air inlet pipe 111 and the air outlet pipe 112, and the air inlet pipe 111 and the air outlet pipe 112 are respectively connected to the heat collecting device 12. The temperature detecting device is used for detecting the temperature of the thermoelectric generation piece 14.
One end of the bypass pipe 113 is connected with the inlet pipe 111, and the other end of the bypass pipe 113 is connected with the outlet pipe 112; an intake valve (not shown) is connected between the bypass duct 113 and the intake duct 111. The intake valve is electrically connected to the battery 22; by arranging the air inlet valve, when the temperature detection device detects that the temperature borne by the thermoelectric generation sheet 14 is too high, the air inlet valve is opened; the tail gas flows to the gas outlet pipeline 112 through the bypass pipeline 113; therefore, when the temperature of the thermoelectric generation piece is too high, the tail gas still enters the heat collection device 12 to enable the thermoelectric conversion module to generate power continuously, and further the thermoelectric generation piece 14 is damaged; thus, the service life of the thermoelectric generation piece 14 can be prolonged; through setting up bypass pipe 113, like this when the air intake valve closes the passageway that gets into heat collection device 12, tail gas can be discharged from bypass pipe 113, can not pass through heat collection device 12 like this and discharge tail gas, can not influence the normal emission of tail gas.
The heat collecting device 12 is provided with a flow guide part, and the flow guide part extends upwards to form on the bottom surface inside the heat collecting device 12; the flow guide member includes a first flow guide member 121 and a second flow guide member 122, and the first flow guide member 121 and the second flow guide member 122 are symmetrically disposed about the air duct 11; an air outlet space 123 is formed between the first flow guide part 121 and the second flow guide part 122; the end of the outlet space 123 close to the inlet pipe 111 is larger than the end of the outlet space 123 far from the inlet pipe 111. By providing the heat collecting device 12 as a heat source of the thermoelectric conversion device 12; the first guide member 121 and the second guide member 122, so that the exhaust gas entering the heat collecting device 12 can rapidly flow to the gas outlet pipe 112; meanwhile, the air outlet channel at one end close to the air inlet pipeline 111 is larger than the air outlet channel at one end far away from the air inlet pipeline 111, so that the air resistance of the tail gas passing through the heat collecting device 12 can be reduced; the power generation efficiency of the thermoelectric conversion device 1 is improved.
The cooling device 13 has a flow guide plate, a water inlet 133 and a water outlet 134; the water inlet 133 and the water outlet 134 are connected with a cooling water tank of the automobile; the baffles include a first baffle 131 and a second baffle 132, and the first baffle 131 and the second baffle 132 are arranged alternately on the cooling device 13; the first guide plate 131 is connected with one side of the cooling device 13 close to the air inlet pipeline 111, the second guide plate 132 is connected with one side of the cooling device 13 far away from the air inlet pipeline 111, and a cooling channel 135 is formed between the first guide plate 131 and the second guide plate 132; the cooling passage 135 is connected to the water inlet 133 and the water outlet 134, respectively. By providing the cooling device 13 as a heat sink for the thermoelectric conversion device 1; the cooling device 13 is conveniently connected with a cooling water tank of the automobile by arranging the water inlet 133 and the water outlet 134, so that the heat dissipation effect is good; by providing the first guide plate 131 and the first guide plate 131, a guiding effect can be provided for the water flow, and by forming the cooling passage 135, the flowing time of the water flow inside the cooling device 13 is prolonged, so that the temperature of the outer surface of the cooling device 13 is uniform.
The number of the cooling devices 13 is two, and the heat collecting device 12 is arranged between the two cooling devices. The two cooling devices improve the heat dissipation effect of the thermoelectric conversion module 11, and improve the power generation efficiency; and the heat collecting device 12 is disposed between the two cooling devices so that the thermoelectric conversion module can uniformly dissipate heat.
The thermoelectric generation piece 14 includes a first generation piece 141 and a second generation piece 142; in this embodiment, the first power generating fin 141 is located above the heat collecting device and disposed between the heat collecting device 12 and a cooling device; the heat collecting device is attached to one end of the first power generating fin 141, and the cooling device is attached to the other end of the first power generating fin 141; the second power generating fin 142 is located above the heat collecting device and is arranged between the heat collecting device 12 and another cooling device; the heat collecting device is attached to one end of the second power generating piece 142, and the cooling device is attached to the other end of the second power generating piece 142. In the present embodiment, sixteen power generation pads are provided for the first power generation pad 141 and the second power generation pad 142, respectively; the first and second power generating tabs 141 and 142 are connected to a battery.
The automobile normally runs to discharge tail gas, the tail gas with a large amount of waste heat flows through the heat collecting device 12, at this time, the heat collecting device 12 with a higher temperature is used as the hot end of the thermoelectric conversion device 1, the first cooling device 13 and the second cooling device 13 are used as the cold ends of the thermoelectric conversion device 1, so that the thermoelectric conversion device 1 generates current, the working principle of thermoelectric generation is the prior art, in the embodiment, the first power generating sheet 141 is connected with the positive electrode of the battery 22, and the second power generating sheet 142 is connected with the negative electrode of the battery 22; each first power generation sheet and each second power generation sheet are provided with an N-type semiconductor and a P-type semiconductor; when the heat collecting device 12 serves as the hot side of the thermoelectric conversion device 1 and the first cooling device 13 and the second cooling device 13 serve as the cold side of the thermoelectric conversion device 1 to operate, the first power generating sheet and the second power generating sheet generate current to charge the battery due to the temperature difference between the hot side and the cold side.
The generated current is stored in the battery 22, and the battery 22 supplies power to the whole exhaust emission detection device. By arranging the battery, even if the vehicle is flamed out, the tail gas still passes through the tail gas emission detection equipment and is then discharged out of the vehicle; at this time, the battery still supplies power to the whole tail gas emission detection equipment, so that the concentration of the tail gas can still be detected, and the detection reliability is improved; after the automobile is prevented from being flamed out, the detection device cannot detect the tail gas which is not arranged and discharged in time. The thermoelectric conversion device 1 further includes a temperature sensor (not shown in the figure); the temperature sensor is respectively connected with the thermoelectric generation piece 14 and the processor; when the temperature sensor monitors that the temperature currently born by the thermoelectric generation piece 14 is the highest temperature of the thermoelectric generation piece 14; the processor adjusts the inlet valve to allow exhaust gas to flow through the bypass line 113.
The clamping device 4 includes a first clamping member 41, a second clamping member 42, a third clamping member 43, and a fixing member 44; the first clamping member 41 is disposed above the first cooling device 13; the second clamping member 42 is disposed below the second cooling device 13; the first clamping member 41 is provided with a first through hole (not shown in the figure); the second clamping member 42 is provided with a second through hole (not shown in the figure); one end of the third clamping member 43 passes through the first through hole to be connected to the fixing member 44; the other end of the third clamping member 43 passes through the second through hole to be connected to the fixing member 44. By arranging the first clamp 41 above the first cooling device 13 and the second clamp 42 below the second cooling device 13; the first clamping member 41 and the second clamping member 42 are connected and fixed by the third clamping member 43 and the fixing member 44; thus, the clamping device 4 can stably connect the cooling device 13 and the thermoelectric generation piece 14 with the heat collection device 12; poor contact among the cooling device 13, the thermoelectric generation piece 14 and the heat collection device 12 is avoided, and further the low power generation efficiency of the thermoelectric conversion device 1 is caused.
In this embodiment, the third clamping member is a connecting member with threads at both ends, and the fixing member is a nut.
The mounting plate 21 has a third through hole (not shown in the drawings); the mounting plate 21 is mounted on the third clamping member 43 through a third through hole and above the first cooling device 13; the third clamping member 43 is connected to the fixing member 44 through the third through hole. The mounting plate is conveniently connected with the clamping device 4 by arranging the third through hole; this avoids the data processing means 2 and the detection means 3 falling.
The detection device 3 comprises a first detection device 31, a second detection device 32 and a detection connecting piece 33; the first detecting device 31 and the second detecting device 32 are both mounted on the mounting plate 31; and is in signal connection with the processor; the detection connecting piece 33 is connected with the first detection device 31, the second detection device 32 and the air outlet pipeline 112; the detection connector 33 is provided with a first port, a second port and a third port; the first port 331, the second port 332, and the third port 333 communicate with each other; the first port is provided with a detection valve (not shown in the figure); the first port 331 is connected to the outlet pipe 112 through a detection valve; the second port 332 is connected to the first detecting device 31, and the third port 333 is connected to the second detecting device 32. By providing the mounting plate 21, the detection device 3 can be stably mounted; by providing the battery 22, electricity generated by the thermoelectric conversion device 1 is stored. In this embodiment, the detection valve is a one-way valve, and by arranging the detection valve, the tail gas is prevented from entering the detection connecting piece and immediately discharged from the first port to the gas outlet channel; this improves the reliability of the detection of the exhaust emission concentration by the detection means.
In the present embodiment, the first detection device 31 is a non-dispersive infrared gas sensor; the second detection device 32 is a nitrogen-oxygen sensor; detecting the concentrations of carbon monoxide, carbon dioxide and hydrocarbons in the exhaust gas by the first detection device 31; detecting the concentration of the nitrogen oxide by the second detection device 32; the detection principle of the first detection device and the second detection device is the prior art, and the detection connecting piece 33 is a flexible Y-shaped pipe with a joint; the first detecting device 31 and the second detecting device 32 are prior art and will not be described in detail herein.
By arranging the thermoelectric conversion device 1, thermoelectric power generation can be performed by utilizing heat released when tail gas is discharged; the thermoelectric conversion device 1 is used for supplying power to the whole tail gas detection device, so that the whole tail gas detection device does not need an external power supply, and resource waste is avoided; detecting the tail gas by arranging a detection device 3; the automobile exhaust emission detection can be carried out in real time, so that the detection result is accurate; by arranging the data processing device 2, the current exhaust emission condition can be fed back to a user, and the exhaust emission condition can be recorded at the same time, so that the exhaust emission condition can be known in time, and the user can arrange a vehicle for maintenance in time after finding a problem; by providing the clamping device 4; the data processing device 2 and the thermoelectric conversion device 1 can be stably connected.
The driving method of the present invention includes the steps of:
1) pre-mounting a detection device; starting the vehicle;
2) the automobile exhaust enters the heat collecting device to provide a heat source for the thermoelectric conversion device, and the automobile cooling water enters the cooling device to provide a cold source for the thermoelectric conversion device;
3) generating current by the thermoelectric generation sheet; the current charges the battery; the battery provides power for the tail gas detection equipment, and the first detection device and the second detection device are started;
4) starting a temperature detection device, and detecting the temperature of the thermoelectric generation piece by the temperature detection device; when the temperature of the thermoelectric generation piece is detected to reach the opening standard of the air inlet valve; the processor opens the air inlet valve; the automobile exhaust flows to the air outlet pipeline through the bypass pipeline;
5) automobile exhaust flows into through the pipeline of giving vent to anger and detects the connecting piece, and first detection device and second detection device carry out real-time detection to automobile exhaust.
The driving method comprises the following steps:
in the step 1), the pre-installation detection device specifically comprises:
2.1) connecting an air inlet pipeline with an exhaust pipe at the rear section of the automobile three-way catalytic device; the air outlet pipeline is connected with an exhaust pipe at the front section of the automobile silencer;
2.2) the water inlet and the water outlet of the cooling device are respectively connected with a cooling water tank of the automobile.
In the step 2, the method specifically comprises the following steps: and cooling water in the cooling water tank enters the water inlet, circulates in the cooling channel and then flows back to the cooling water tank from the water outlet. The automobile exhaust enters the heat collecting device through the air inlet pipeline; through the outlet space and then out of the outlet duct.
The step 4) is specifically as follows: when the temperature of the thermoelectric generation piece is detected to reach the opening standard of the air inlet valve; the processor opens the air inlet valve; the automobile exhaust flows to the air outlet pipeline through the bypass pipeline; when the temperature of the thermoelectric generation piece is detected to be not equal to the opening standard of the air inlet valve; the automobile exhaust flows to the air outlet pipeline through the air inlet pipeline;
the temperature of thermoelectric generation piece reaches the opening standard of air inlet valve, specifically does: the instant temperature of the thermoelectric generation piece is larger than the maximum bearing temperature of the thermoelectric generation piece.
And 5), feeding back the detection results of the first detection device and the second detection device on the tail gas to a user by the processor.
According to the driving method, the tail gas discharged by the automobile is utilized to provide a heat source for the thermoelectric conversion device through the thermoelectric conversion device; cooling water of an automobile cooling water tank is used for providing a cold source for the thermoelectric conversion device to perform thermoelectric power generation; supplying power to the whole tail gas detection device; therefore, the whole tail gas detection device does not need to be externally connected with a power supply, and resource waste is avoided; detecting the temperature of the thermoelectric power generation piece through a temperature detection device; when the instant temperature of the thermoelectric power generation piece is detected to be larger than the maximum bearing temperature of the thermoelectric power generation piece, the air inlet valve is opened; tail gas flows to an air outlet pipeline through a bypass pipeline; the tail gas still enters the heat collecting device to enable the thermoelectric conversion module to continuously generate power when the temperature borne by the thermoelectric generation piece is too high, so that the thermoelectric generation piece is prevented from being damaged; therefore, the service life of the thermoelectric power generation piece can be prolonged.
Claims (9)
1. The utility model provides a tail gas detection equipment which characterized in that: the device comprises a thermoelectric conversion device, a data processing device, a clamping device and a detection device for detecting the exhaust emission concentration; the detection device is connected with the data processing device; the data processing device is positioned above the thermoelectric conversion device; the data processing device and the thermoelectric conversion device are fixed through a clamping device; the data processing device comprises a processor, and the detection device is in signal connection with the processor;
the thermoelectric conversion device comprises an air duct, a heat collecting device, a cooling device and a thermoelectric generation piece; the thermoelectric generation piece is arranged between the heat collection device and the cooling device and is connected with the heat collection device and the cooling device; the heat collecting device is arranged between the air inlet pipeline and the air outlet pipeline and is connected with the air inlet pipeline and the air outlet pipeline; one end of the bypass pipeline is connected with the air inlet pipeline; the other end of the bypass pipeline is connected with the air outlet pipeline; an air inlet valve is arranged between the bypass pipeline and the air inlet pipeline;
the heat collecting device is provided with a flow guide piece, and the flow guide piece is provided with an air outlet space; the cooling device is provided with a guide plate, a water inlet and a water outlet; the water inlet and the water outlet are connected with an automobile cooling water tank, and a cooling channel is formed on the flow guide plate; the cooling channel is respectively connected with the water inlet and the water outlet.
2. The exhaust gas detection apparatus according to claim 1, characterized in that: the data processing device comprises a battery, a temperature detection device and an installation plate; the battery, the temperature detection device and the detection device are arranged on the mounting plate; the detection device comprises a first detection device, a second detection device and a detection connecting piece; the first detection device and the second detection device are both arranged on the mounting plate and are connected with the processor; the detection connecting piece is connected with the first detection device, the second detection device and the air outlet pipeline; the detection connecting piece is provided with a first port, a second port and a third port; the first port, the second port and the third port are communicated with each other; the first port is provided with a detection valve; the first port is connected with the air outlet pipeline through a detection valve; the second port is connected with the first detection device; the third port is connected with the second detection device.
3. The exhaust gas detection apparatus according to claim 2, characterized in that: the flow guide piece comprises a first flow guide piece and a second flow guide piece, and the first flow guide piece and the second flow guide piece are symmetrically arranged relative to the ventilation pipeline; an air outlet space is formed between the first flow guide part and the second flow guide part; one end of the air outlet space close to the air inlet pipeline is larger than one end of the air outlet space far away from the air inlet pipeline.
4. The exhaust gas detection apparatus according to claim 2, characterized in that: the guide plates comprise a first guide plate and a second guide plate, and the first guide plate and the second guide plate are arranged on the cooling device in a staggered mode; the first guide plate is connected with one side of the cooling device close to the air inlet pipeline, the second guide plate is connected with one side of the cooling device far away from the air inlet pipeline, and a cooling channel is formed between the first guide plate and the second guide plate.
5. The control method of the exhaust gas detection apparatus according to claim 1, characterized in that: the method comprises the following steps:
1) pre-mounting a detection device; starting the vehicle;
2) the automobile exhaust enters the heat collecting device to provide a heat source for the thermoelectric conversion device, and the automobile cooling water enters the cooling device to provide a cold source for the thermoelectric conversion device;
3) generating current by the thermoelectric generation sheet; the current charges the battery; the battery provides power for the tail gas detection equipment, and the first detection device and the second detection device are started;
4) starting a temperature detection device, and detecting the temperature of the thermoelectric generation piece by the temperature detection device; when the temperature of the thermoelectric generation piece is detected to reach the opening standard of the air inlet valve; the processor opens the air inlet valve; the automobile exhaust flows to the air outlet pipeline through the bypass pipeline;
5) automobile exhaust flows into through the pipeline of giving vent to anger and detects the connecting piece, and first detection device and second detection device carry out real-time detection to automobile exhaust.
6. The method for driving the vehicle power generation device based on the tail gas temperature as claimed in claim 5, wherein in the step 1), the pre-installation detection device is specifically as follows:
1) the air inlet pipeline is connected with an exhaust pipe at the rear section of the automobile three-way catalytic device; the air outlet pipeline is connected with an exhaust pipe at the front section of the automobile silencer;
2) the water inlet and the water outlet of the cooling device are respectively connected with a cooling water tank of the automobile.
7. The control method of the tail gas detection equipment according to claim 6, characterized in that the step 4) is specifically as follows: when the temperature of the thermoelectric generation piece is detected to reach the opening standard of the air inlet valve; the processor opens the air inlet valve; the automobile exhaust flows to the air outlet pipeline through the bypass pipeline; when the temperature of the thermoelectric generation piece is detected to be not equal to the opening standard of the air inlet valve; the automobile exhaust flows to the air outlet pipeline through the air inlet pipeline;
the temperature of thermoelectric generation piece reaches the opening standard of air inlet valve, specifically does: the instant temperature of the thermoelectric generation piece is larger than the maximum bearing temperature of the thermoelectric generation piece.
8. The method for controlling the exhaust gas detection device according to claim 7, wherein in the step 2, the method specifically comprises: and cooling water in the cooling water tank enters the water inlet, circulates in the cooling channel and then flows back to the cooling water tank from the water outlet.
9. The method for controlling the exhaust gas detection device according to claim 8, wherein in the step 2, the method specifically comprises: the automobile exhaust enters the heat collecting device through the air inlet pipeline; through the outlet space and then out of the outlet duct.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011126417.4A CN112211706A (en) | 2020-10-20 | 2020-10-20 | Tail gas detection equipment and control method |
| PCT/CN2021/109579 WO2022083214A1 (en) | 2020-10-20 | 2021-07-30 | Emission measurement equipment and control method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011126417.4A CN112211706A (en) | 2020-10-20 | 2020-10-20 | Tail gas detection equipment and control method |
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| CN112211706A true CN112211706A (en) | 2021-01-12 |
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| CN202011126417.4A Pending CN112211706A (en) | 2020-10-20 | 2020-10-20 | Tail gas detection equipment and control method |
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| CN (1) | CN112211706A (en) |
| WO (1) | WO2022083214A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022083214A1 (en) * | 2020-10-20 | 2022-04-28 | 广州城市理工学院 | Emission measurement equipment and control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201507346U (en) * | 2009-09-11 | 2010-06-16 | 厦门大学 | Automobile exhaust pipe temperature difference power generating and energy saving device |
| CN202424587U (en) * | 2011-12-16 | 2012-09-05 | 武汉理工大学 | Device for regulating temperature of box body of temperature difference power generation system |
| DE102013221573A1 (en) * | 2012-12-18 | 2014-06-18 | Magna Powertrain Ag & Co. Kg | Thermoelectric generator for use with internal combustion engine, has thermoelectric elements which are arranged on plates, such that each of thermoelectric elements is in contact with heating section and cooling section |
| CN205260106U (en) * | 2016-01-07 | 2016-05-25 | 张健 | Vehicle power -saving device |
| CN108049947B (en) * | 2017-11-24 | 2020-08-28 | 江苏大学 | Multi-channel tail gas heat flow-dividing control thermoelectric power generation device and control method |
| EP3591181A1 (en) * | 2018-07-03 | 2020-01-08 | Winterthur Gas & Diesel Ltd. | Internal combustion engine and method of measuring a component of exhaust in an exhaust gas |
| CN112211706A (en) * | 2020-10-20 | 2021-01-12 | 华南理工大学广州学院 | Tail gas detection equipment and control method |
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2020
- 2020-10-20 CN CN202011126417.4A patent/CN112211706A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022083214A1 (en) * | 2020-10-20 | 2022-04-28 | 广州城市理工学院 | Emission measurement equipment and control method |
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