CN113607809B - Automobile-used urea solution quality detection device of anti-bubble interference - Google Patents
Automobile-used urea solution quality detection device of anti-bubble interference Download PDFInfo
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- CN113607809B CN113607809B CN202110867813.0A CN202110867813A CN113607809B CN 113607809 B CN113607809 B CN 113607809B CN 202110867813 A CN202110867813 A CN 202110867813A CN 113607809 B CN113607809 B CN 113607809B
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- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 title claims abstract description 259
- 239000004202 carbamide Substances 0.000 title claims abstract description 259
- 238000001514 detection method Methods 0.000 title claims abstract description 57
- 239000007788 liquid Substances 0.000 claims abstract description 98
- 239000000243 solution Substances 0.000 claims description 179
- 238000001914 filtration Methods 0.000 claims description 8
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 3
- 230000002265 prevention Effects 0.000 claims 4
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 9
- 239000007789 gas Substances 0.000 description 8
- 230000008030 elimination Effects 0.000 description 7
- 238000003379 elimination reaction Methods 0.000 description 7
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- 239000000523 sample Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000003749 cleanliness Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000002452 interceptive effect Effects 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 238000006424 Flood reaction Methods 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/02—Analysing fluids
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/222—Constructional or flow details for analysing fluids
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/022—Liquids
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- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
- Exhaust Gas After Treatment (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The application relates to a prevent automobile-used urea solution quality detection device of bubble interference belongs to urea jar urea solution quality detection technical field, include: the bubble eliminator is arranged in the urea box and immersed in the urea solution, the bubble eliminator comprises an outer shell body with a hollow inside, a liquid inlet and an air outlet which are arranged in a height difference manner are formed in the outer shell body, and the position of the air outlet is higher than that of the liquid inlet; the quality detector is arranged in the outer shell and comprises an inner shell with a hollow inside, a detection module for detecting the quality of urea solution is arranged in the inner shell, and a liquid inlet with an upward opening is formed in the inner shell. The bubble eliminator greatly reduces the signal interference of bubbles in the urea solution to the detection module, and improves the quality detection precision of the detection module to the urea solution. The novel plastic bottle cap is simple in structure, easy to produce and manufacture, low in cost and good in effect. The urea box is suitable for various urea boxes, is convenient for enterprises to produce and manufacture in batches, and reduces cost.
Description
Technical Field
The application relates to the technical field of urea solution quality detection of urea tanks, in particular to an anti-bubble-interference vehicle urea solution quality detection device.
Background
Emissions to the atmosphere of nitrogen oxides NOx are becoming more and more stringent in regulations regarding vehicle emissions. There are two methods to solve this problem, one by the EGR in-machine purification and the other by the off-machine purification to treat NOx emissions; the aqueous urea solution is hydrolyzed in the exhaust stream, which in turn converts nitrogen oxides NOx into nitrogen N2 and water H2O. SCR systems are commonly used in vehicles of four and five countries, and the SCR system requires a storage device for a urea solution, commonly referred to as a urea tank.
The urea box is provided with an ultrasonic urea concentration sensor for monitoring the concentration of urea aqueous solution in the urea box, and the ultrasonic urea concentration sensor is an ultrasonic-based urea quality detection method, and the principle of the ultrasonic-based urea quality detection method is that the difference of propagation speeds of ultrasonic waves in different media is utilized to carry out urea identification and urea concentration detection. Within a fixed distance, the ultrasound differs between different media and the time of flight of different urea concentrations.
The ultrasonic urea concentration sensor is placed in the urea box: an ultrasonic probe (transceiver) is used to send out the sound wave pulse to the reflecting baffle plate and then reflected back to the probe. The average time of flight (TOF) was calculated over multiple cycles, with TOF being almost constant at a fixed temperature and urea concentration of 32.5%. And if the ultrasonic urea concentration sensor detects that the urea solution is higher than or lower than the threshold value of TOF, judging that the quality of the urea solution is unqualified.
However, when the urea tank is mounted on a vehicle, the urea tank inevitably vibrates with the engine and the vehicle, and the vibration causes the urea solution to be continuously mixed with air to generate a large amount of bubbles. Because the propagation rates of sound waves in gas and liquid are different, bubbles arranged between the ultrasonic probe and the reflecting baffle can interfere the detection of the ultrasonic urea concentration sensor on the concentration of urea solution, so that the ultrasonic urea concentration sensor is frequently in error reporting condition, and the SCR system is caused to be faulty.
Disclosure of Invention
The embodiment of the application provides a vehicle urea solution quality detection device capable of preventing air bubble interference, which is used for solving the problem that an ultrasonic urea concentration sensor is frequently wrong due to air bubbles generated in urea solution in the related technology.
The embodiment of the application provides a prevent automobile-used urea solution quality detection device of bubble interference, include:
the bubble eliminator is arranged in the urea box and immersed in urea solution, the bubble eliminator comprises an outer shell body with a hollow inside, a liquid inlet and an air outlet which are arranged in a height difference manner are formed in the outer shell body, and the position of the air outlet is higher than that of the liquid inlet;
the quality detector is arranged in the outer shell and comprises an inner shell with a hollow inside, a detection module for detecting the quality of urea solution is arranged in the inner shell, and a liquid inlet with an upward opening is formed in the inner shell.
The utility model provides a car urea solution quality detection device that anti-bubble disturbed sets up the bubble elimination ware in the urea case and immerses in urea solution, has seted up inlet and the gas vent that the difference in height set up on the shell body of bubble elimination ware, and the position of gas vent is higher than the inlet. A step of
The urea solution in the urea box enters the outer shell from the liquid inlet of the outer shell, and bubbles in the urea solution in the outer shell automatically float upwards and are discharged from the air outlet of the outer shell, so that the number of bubbles in the urea solution in the outer shell is reduced, and the primary urea solution bubble removal is completed.
The outer shell is immersed in the urea solution, the urea solution in the outer shell cannot be contacted with air, and bubbles cannot be newly increased even if the urea solution in the outer shell vibrates.
The urea solution in the outer shell enters the inner shell of the quality detector from the liquid inlet hole again, and the liquid inlet hole on the inner shell is upward, so that bubbles are difficult to enter the inner shell, the number of the bubbles of the urea solution in the inner shell is further reduced, and the secondary urea solution bubble elimination is completed.
The detection module detects the quality of the urea solution after the two times of bubble removal, so that the signal interference of the bubbles in the urea solution to the detection module is greatly reduced, and the quality detection precision of the detection module to the urea solution is improved. The novel plastic bottle cap is simple in structure, easy to produce and manufacture, low in cost and good in effect. The urea box is suitable for various urea boxes, is convenient for enterprises to produce and manufacture in batches, and reduces cost.
In some embodiments: the liquid inlet is arranged on the side wall of the outer shell, and a liquid inlet filter screen for filtering urea solution entering the outer shell from the liquid inlet is arranged on the outer shell.
In some embodiments: the exhaust port is arranged at the top of the outer shell, and an exhaust port filter screen for filtering urea solution entering the outer shell from the exhaust port is arranged on the outer shell.
In some embodiments: the outer shell is also provided with a liquid outlet, and the liquid outlet is connected with a urea liquid outlet pipe for outputting urea solution in the outer shell to a urea injection system.
In some embodiments: the liquid inlet is arranged at the top of the inner shell, and is of a cross structure for breaking bubbles.
In some embodiments: the bottom of the inner shell is provided with a liquid discharge hole, and a one-way valve for discharging urea solution in the inner shell is arranged in the liquid discharge hole.
In some embodiments: the detection module comprises an ultrasonic transceiver and an ultrasonic reflector, and the ultrasonic transceiver and the ultrasonic reflector are arranged on the inner shell at intervals so as to detect the quality of urea solution in the inner shell.
In some embodiments: the ultrasonic transceiver and the ultrasonic reflector are arranged at the bottom of the inner shell, and ultrasonic waves emitted by the ultrasonic transceiver are emitted to the ultrasonic reflector in the horizontal direction.
In some embodiments: the ultrasonic transceiver is characterized in that an ultrasonic transmitting port for installing an ultrasonic transceiver is formed in the inner shell, an ultrasonic receiving port for installing an ultrasonic reflector is formed in the inner shell, and the transmitting port and the receiving port are oppositely arranged in the horizontal direction.
In some embodiments: the outer shell is fixed at the bottom of the urea box, and the inner shell is fixed at the bottom of the outer shell.
The beneficial effects that technical scheme that this application provided brought include:
the embodiment of the application provides a vehicle urea solution quality detection device capable of preventing air bubble interference, because the vehicle urea solution quality detection device capable of preventing air bubble interference is provided with an air bubble eliminator, the air bubble eliminator is arranged in a urea box and immersed in urea solution, the air bubble eliminator comprises an outer shell body with a hollow interior, a liquid inlet and an air outlet which are arranged in a height difference manner are formed in the outer shell body, and the position of the air outlet is higher than that of the liquid inlet; the quality detector is arranged in the outer shell and comprises an inner shell with a hollow inside, a detection module for detecting the quality of urea solution is arranged in the inner shell, and a liquid inlet with an upward opening is formed in the inner shell.
Therefore, the automobile-used urea solution quality detection device that anti-bubble disturbed of this application sets up the bubble elimination ware in the urea case and immerses in the urea solution, has seted up inlet and the gas vent that the difference in height set up on the shell body of bubble elimination ware, and the position of gas vent is higher than the inlet. The urea solution in the urea box enters the outer shell from the liquid inlet of the outer shell, and bubbles in the urea solution in the outer shell automatically float upwards and are discharged from the air outlet of the outer shell, so that the number of bubbles in the urea solution in the outer shell is reduced, and the primary urea solution bubble removal is completed. The outer shell is immersed in the urea solution, the urea solution in the outer shell cannot be contacted with air, and bubbles cannot be newly increased even if the urea solution in the outer shell vibrates.
The urea solution in the outer shell enters the inner shell of the quality detector from the liquid inlet hole again, and the liquid inlet hole on the inner shell is upward, so that bubbles are difficult to enter the inner shell, the number of the bubbles of the urea solution in the inner shell is further reduced, and the secondary urea solution bubble elimination is completed. The detection module detects the quality of the urea solution after the two times of bubble removal, so that the signal interference of the bubbles in the urea solution to the detection module is greatly reduced, and the quality detection precision of the detection module to the urea solution is improved. The novel plastic bottle cap is simple in structure, easy to produce and manufacture, low in cost and good in effect. The urea box is suitable for various urea boxes, is convenient for enterprises to produce and manufacture in batches, and reduces cost.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of an embodiment of the present application disposed within a urea tank;
FIG. 2 is a schematic exploded view of the structure of the bubble eliminator and the quality detector according to the embodiment of the present application;
FIG. 3 is a schematic view of an outer housing according to an embodiment of the present disclosure;
FIG. 4 is an exploded view of a quality detector according to an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of an inner housing according to an embodiment of the present application.
Reference numerals:
100. a bubble eliminator; 110. an outer housing; 111. a liquid inlet; 112. an exhaust port; 113. a liquid outlet; 120. the liquid inlet is filtered by a filter screen; 130. an exhaust port filter screen; 140. a urea liquid outlet pipe;
200. a quality detector; 210. an inner housing; 211. an ultrasonic wave emitting port; 212. a liquid inlet hole; 213. a liquid discharge hole; 220. an ultrasonic transceiver; 230. an ultrasonic reflector; 240. a one-way valve; 300. a urea tank.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present application based on the embodiments herein.
The embodiment of the application provides a car urea solution quality detection device of anti-bubble interference, which can solve the problem that ultrasonic wave urea concentration sensors frequently report errors caused by bubbles generated in urea solution in the related technology.
Referring to fig. 1 to 5, an embodiment of the present application provides a device for detecting quality of urea solution for a vehicle for preventing air bubble interference, including:
the bubble eliminator 100, the bubble eliminator 100 is placed in the urea tank 300 and immersed in the urea solution, the bubble eliminator 100 includes an outer housing 110 having a hollow interior, and the outer housing 110 is fixedly located at the bottom of the urea tank 300. The outer housing 110 is provided with a liquid inlet 111 and an air outlet 112, which are arranged in a height difference manner, and the position of the air outlet 112 is higher than that of the liquid inlet 111.
The bubble eliminator 100 is fixedly connected with the bottom of the urea tank 300, the urea solution in the urea tank 300 completely floods the bubble eliminator 100, the urea solution enters the inner cavity of the outer shell 110 from the liquid inlet 111 of the outer shell 110, and bubbles which enter the inner cavity of the outer shell 110 along with the urea solution automatically float upwards and are discharged from the air outlet 112 of the outer shell 110, so that the number of bubbles in the urea solution in the outer shell 110 is reduced.
The quality detector 200, the quality detector 200 is disposed in the inner cavity of the outer housing 110, the quality detector 200 includes an inner housing 210 with a hollow interior, the inner housing 210 is fixedly disposed at the bottom of the outer housing 110, a detection module for detecting the quality of urea solution is disposed in the inner housing 210, and an inlet 212 with an upward opening is formed on the inner housing 210.
The quality detector 200 is fixed in the outer housing 110 of the bubble eliminator 100, the urea solution in the outer housing enters the inner cavity of the outer housing from the liquid inlet 212 on the inner housing 210, and the bubbles in the urea solution are difficult to enter the inner cavity of the inner housing 210 in the process of floating upwards due to the upward opening of the liquid inlet 212, so that even if a small amount of bubbles enter the inner cavity of the inner housing 210, the bubbles can automatically float upwards and be discharged from the liquid inlet 212.
The anti-bubble-interference vehicle urea solution quality detection device of the embodiment of the application is characterized in that a bubble eliminator 100 is arranged in a urea box 300 and immersed in urea solution, a liquid inlet 111 and an air outlet 112 which are arranged in a height difference manner are formed in an outer shell 110 of the bubble eliminator 100, and the position of the air outlet 112 is higher than that of the liquid inlet 111. The urea solution in the urea tank 300 enters the outer shell 110 from the liquid inlet 111 of the outer shell 110, and bubbles in the urea solution placed in the outer shell 110 automatically float upwards and are discharged from the air outlet 112 of the outer shell 110, so that the number of bubbles in the urea solution placed in the outer shell 110 is reduced, and primary urea solution bubble removal is completed. And the outer shell 110 is immersed in the urea solution, the urea solution placed in the outer shell 110 is not contacted with the outside air, and bubbles are not newly increased even if the urea solution placed in the outer shell 110 oscillates.
The urea solution placed in the outer casing 110 again enters the inner casing 210 of the quality detector 200 from the liquid inlet 212, and since the liquid inlet 212 on the inner casing 210 is opened upwards, bubbles are difficult to enter the inner casing 210, the number of bubbles of the urea solution placed in the inner casing 210 is further reduced, and secondary urea solution bubble removal is completed. The detection module detects the quality of the urea solution after the two times of bubble removal, so that the signal interference of the bubbles in the urea solution to the detection module is greatly reduced, and the quality detection precision of the detection module to the urea solution is improved.
In some alternative embodiments: referring to fig. 2 and 3, an embodiment of the present application provides a device for detecting quality of urea solution for vehicles, where a liquid inlet 111 of the device for detecting quality of urea solution for vehicles is disposed on a side wall of an outer casing 110, and a liquid inlet filter screen 120 for filtering urea solution entering the outer casing 110 from the liquid inlet 111 is disposed on the outer casing 110.
The outer shell 110 of this application embodiment is preferably the confined rectangle structure all around, and inlet 111 is equipped with two, and two inlet 111 are located the lateral wall of outer shell 110 respectively, and two inlet 111 are in the position down as far as possible on outer shell 110 to guarantee also can get into in the outer shell 110 when the liquid level of urea solution in the urea case 300 is very low, do not influence the quality that detection module normally detects urea solution.
The outer shell 110 is provided with a liquid inlet filter screen 120 for filtering urea solution entering the outer shell 110 from the liquid inlet 111, and the liquid inlet filter screen 120 can filter impurities or ice residues of the urea solution entering the outer shell 110, so that the cleanliness of the urea solution entering the outer shell 110 is ensured, and the quality of the urea solution is not influenced by the detection module.
In some alternative embodiments: referring to fig. 2 and 3, an embodiment of the present application provides a device for detecting quality of urea solution for vehicles, wherein an exhaust port 112 of the device for detecting quality of urea solution for vehicles is disposed at the top of an outer housing 110, and an exhaust port filter screen 130 for filtering urea solution entering the outer housing 110 from the exhaust port 112 is disposed on the outer housing 110.
In this embodiment, the exhaust port 112 is disposed at the top of the outer casing 110, and after the urea solution in the urea tank 300 enters the outer casing 110, the bubbles that follow the urea solution and enter the outer casing 110 automatically float to the top of the outer casing 110 and gather, and are jointly discharged from the exhaust port 112 at the top of the outer casing 110.
The outer shell 110 is provided with an exhaust port filter screen 130 for filtering urea solution entering the outer shell 110 from the exhaust port 112, and the exhaust port filter screen 130 can filter impurities or ice residues of the urea solution entering the outer shell 110, so that the cleanliness of the urea solution entering the outer shell 110 is ensured, and the quality of the urea solution is not influenced by the detection module.
In some alternative embodiments: referring to fig. 2 and 3, an embodiment of the present application provides an anti-bubble device for detecting quality of urea solution for vehicles, where an outer shell 110 of the anti-bubble device for detecting quality of urea solution for vehicles is further provided with a liquid outlet 113, and the liquid outlet 113 is located at the top of the outer shell 110. The urea outlet pipe 140 for outputting the urea solution in the outer case 110 to the urea injection system is connected to the liquid outlet 113.
The embodiment of the application further provides a liquid outlet 113 on the outer shell 110, and the liquid outlet 113 is connected with a urea liquid outlet pipe 140 for outputting urea solution in the outer shell 110 to a urea injection system. The urea injection system sucks the urea solution in the outer shell 110 through the urea outlet pipe 140, and injects the urea solution to the post-treatment to participate in the tail gas treatment. The urea outlet pipe 140 extracts the filtered urea solution from the outer housing 110, avoiding clogging the urea flow channels in the relevant components.
Next, a liquid outlet 113 is formed at the top of the outer shell 110, and the urea liquid outlet 140 can discharge the urea solution and the bubbles which are not discharged from the air outlet 112 in time during the process of extracting the urea liquid in the outer shell 110, so as to further accelerate the elimination of the bubbles in the urea solution and further reduce the number of the bubbles in the urea solution in the outer shell 110.
In some alternative embodiments: referring to fig. 5, an embodiment of the present application provides a device for detecting quality of urea solution for vehicles, which is capable of preventing air bubbles from interfering, wherein a liquid inlet 212 of the device for detecting quality of urea solution for vehicles is disposed at the top of an inner housing 210, and the liquid inlet 212 is in a cross-shaped structure for breaking air bubbles.
The inner housing 210 in this embodiment is preferably a rectangular structure with closed periphery, the liquid inlet 212 is disposed at the top of the inner housing 210 and has an upward opening, and urea solution in the outer housing 110 enters the inner cavity of the inner housing 210 from the liquid inlet 212, and the flow direction of urea solution entering the inner cavity of the inner housing 210 is opposite to the floating direction of bubbles, so that the bubbles are difficult to enter the inner housing 210 from the liquid inlet 212. Even bubbles entering the inner housing 210 from the liquid inlet 212 automatically float upward and are discharged from the liquid inlet 212.
The liquid inlet 212 of the embodiment of the present application is preferably in a cross-shaped structure, the shape of the liquid inlet 212 is narrow, and bubbles are ruptured by the liquid inlet 212 when entering the inner housing 210 from the liquid inlet 212 in the cross-shaped structure. The liquid inlet 212 of the cross structure is not easily blocked by bubbles, so that the fluidity of urea solution is improved.
In some alternative embodiments: referring to fig. 4 and 5, an embodiment of the present application provides a device for detecting quality of urea solution for vehicles, which is capable of preventing air bubbles from interfering, wherein a drain hole 213 is formed at the bottom of an inner housing 210 of the device for detecting quality of urea solution for vehicles, and a check valve 240 for discharging urea solution in the inner housing 210 is disposed in the drain hole 213.
The bottom of the inner housing 210 in this embodiment is provided with a drain hole 213, and a check valve 240 for draining urea solution in the inner housing 210 is disposed in the drain hole 213. The check valve 240 is closed when the level of the urea solution in the urea tank 300 is not lower than the level of the urea solution in the inner housing 210, preventing the urea solution outside the inner housing 210 from entering the inner housing 210 from the drain hole 213.
When the level of the urea solution in the urea tank 300 is lower than the level of the urea solution in the inner housing 210, the check valve 240 is in an open state to allow the urea solution in the inner housing 210 to be discharged from the drain hole 213. To ensure that the newly added urea solution can enter the inner housing 210 when the new urea solution is newly added, so that the detection module detects the quality of the newly added urea solution.
In some alternative embodiments: referring to fig. 4 and 5, an embodiment of the present application provides a device for detecting quality of urea solution for vehicles, which includes an ultrasonic transceiver 220 and an ultrasonic reflector 230, wherein the ultrasonic transceiver 220 and the ultrasonic reflector 230 are spaced on an inner housing 210 to detect quality of urea solution in the inner housing 210.
The ultrasonic transceiver 220 and the ultrasonic reflector 230 are disposed at the bottom of the inner case 210, and ultrasonic waves emitted from the ultrasonic transceiver 220 are emitted to the ultrasonic reflector 230 in a horizontal direction.
The ultrasonic transceiver 220 is configured to generate ultrasonic waves with different frequencies and different amplitudes, and receive the ultrasonic waves with the frequencies and the amplitudes to obtain corresponding ultrasonic attenuation coefficients, and calculate corresponding concentration values according to the ultrasonic attenuation coefficients. The ultrasonic reflector 230 realizes the reflection of ultrasonic waves with different frequencies and different amplitudes, and can pass through urea solutions with different concentrations, so that the concentration of the urea solution can be measured quickly and effectively.
The ultrasonic transceiver 220 and the ultrasonic reflector 230 are arranged at the bottom of the inner shell 210 at a certain distance, urea solution is filled between the ultrasonic transceiver 220 and the ultrasonic reflector 230, and the urea solution is used for transmitting ultrasonic waves emitted by the ultrasonic transceiver 220 to the ultrasonic reflector 230 through the urea solution and then reflecting the ultrasonic waves back to the ultrasonic transceiver 220, and average time of flight (TOF) is calculated through ultrasonic wave multiple cycles, so that whether the quality of the urea solution is qualified or not is judged.
In some alternative embodiments: referring to fig. 4 and 5, an embodiment of the present application provides a device for detecting quality of urea solution for vehicle, wherein an inner housing 210 of the device for detecting quality of urea solution for vehicle is provided with an ultrasonic transmitting port 211 for installing an ultrasonic transceiver 220, and an inner housing 210 is provided with an ultrasonic receiving port (not shown) for installing an ultrasonic reflector 230, and the ultrasonic transmitting port 211 and the ultrasonic receiving port are arranged horizontally opposite to each other.
In the embodiment of the present application, the inner housing 210 is provided with an ultrasonic transmitting port 211 for installing the ultrasonic transceiver 220, and the inner housing 210 is provided with an ultrasonic receiving port for installing the ultrasonic reflector 230. The ultrasonic transceiver 220 and the ultrasonic reflector 230 are conveniently installed and arranged on the inner housing 210, the assembly difficulty of the ultrasonic transceiver 220 and the ultrasonic reflector 230 is reduced, and the assembly efficiency is improved.
Principle of operation
The embodiment of the application provides a vehicle urea solution quality detection device capable of preventing air bubble interference, because the vehicle urea solution quality detection device capable of preventing air bubble interference is provided with an air bubble eliminator 100, the air bubble eliminator 100 is arranged in a urea box 300 and immersed in urea solution, the air bubble eliminator 100 comprises an outer shell 110 with a hollow inside, a liquid inlet 111 and an air outlet 112 which are arranged in a height difference manner are formed in the outer shell 110, and the position of the air outlet 112 is higher than that of the liquid inlet 111; the quality detector 200 is disposed in the outer casing 110, the quality detector 200 includes an inner casing 210 with a hollow interior, a detection module for detecting the quality of urea solution is disposed in the inner casing 210, and an inlet 212 with an upward opening is disposed on the inner casing 210.
Therefore, in the anti-bubble-interference vehicle urea solution quality detection device of the present application, the bubble eliminator 100 is disposed in the urea tank 300 and immersed in the urea solution, the outer housing 110 of the bubble eliminator 100 is provided with the liquid inlet 111 and the gas outlet 112 disposed at a height difference, and the position of the gas outlet 112 is higher than the liquid inlet 111. The urea solution in the urea tank 300 enters the outer shell 110 from the liquid inlet 111 of the outer shell 110, and bubbles in the urea solution placed in the outer shell 110 automatically float upwards and are discharged from the air outlet 112 of the outer shell 110, so that the number of bubbles in the urea solution placed in the outer shell 110 is reduced, and primary urea solution bubble removal is completed. And the outer shell 110 is immersed in the urea solution, the urea solution placed in the outer shell 110 is not contacted with the outside air, and bubbles are not newly increased even if the urea solution placed in the outer shell 110 oscillates.
The urea solution placed in the outer casing 110 again enters the inner casing 210 of the quality detector 200 from the liquid inlet 212, and since the liquid inlet 212 on the inner casing 210 is opened upwards, bubbles are difficult to enter the inner casing 210, the number of bubbles of the urea solution placed in the inner casing 210 is further reduced, and secondary urea solution bubble removal is completed. The detection module detects the quality of the urea solution after the two times of bubble removal, so that the signal interference of the bubbles in the urea solution to the detection module is greatly reduced, and the quality detection precision of the detection module to the urea solution is improved. The novel plastic bottle cap is simple in structure, easy to produce and manufacture, low in cost and good in effect. The urea box is suitable for various urea boxes, is convenient for enterprises to produce and manufacture in batches, and reduces cost.
In the description of the present application, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of description of the present application and simplification of the description, and are not indicative or implying that the apparatus or element in question must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present application. Unless specifically stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.
It should be noted that in this application, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The foregoing is merely a specific embodiment of the application to enable one skilled in the art to understand or practice the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (5)
1. The utility model provides a car urea solution quality detection device that anti-bubble disturbed which characterized in that includes:
the bubble eliminator (100) is arranged in the urea tank (300) and immersed in urea solution, the bubble eliminator (100) comprises an outer shell (110) with a hollow inside, a liquid inlet (111) and an air outlet (112) which are arranged in a height difference manner are formed in the outer shell (110), and the position of the air outlet (112) is higher than that of the liquid inlet (111);
the quality detector (200), the quality detector (200) is arranged in the outer shell (110), the quality detector (200) comprises an inner shell (210) with a hollow inside, a detection module for detecting the quality of urea solution is arranged in the inner shell (210), and a liquid inlet (212) with an upward opening is formed in the inner shell (210);
the urea solution in the urea box (300) enters the outer shell (110) from a liquid inlet (111) of the outer shell (110), and bubbles in the urea solution in the outer shell (110) automatically float upwards and are discharged from an exhaust port (112) of the outer shell (110), so that primary urea solution bubble removal is completed;
the urea solution placed in the outer shell (110) enters the inner shell (210) of the quality detector (200) from the liquid inlet hole (112) again, so that the secondary urea solution bubble removal is completed;
a liquid outlet (113) is further formed in the outer shell (110), and the liquid outlet (113) is located at the top of the outer shell (110); the liquid outlet (113) is connected with a urea liquid outlet pipe (140) for outputting urea solution in the outer shell (110) to a urea injection system, and the urea liquid outlet pipe (140) is used for extracting urea solution in the outer shell (110) so as to discharge the urea solution and bubbles which are not discharged from the air outlet (112) in time together;
the liquid inlet (111) is arranged on the side wall of the outer shell (110), and a liquid inlet filter screen (120) for filtering urea solution entering the outer shell from the liquid inlet (111) is arranged on the outer shell (110);
the exhaust port (112) is arranged at the top of the outer shell (110), and an exhaust port filter screen (130) for filtering urea solution entering the outer shell (110) from the exhaust port (112) is arranged on the outer shell (110);
the liquid inlet hole (212) is arranged at the top of the inner shell (210), and the liquid inlet hole (212) is of a cross-shaped structure for breaking bubbles;
a liquid discharge hole (213) is formed in the bottom of the inner shell (210), and a one-way valve (240) for discharging urea solution in the inner shell (210) is arranged in the liquid discharge hole (213); when the liquid level of the urea solution in the urea tank (300) is not lower than the liquid level of the urea in the inner shell (210), the one-way valve (240) is in a closed state; when the liquid level of the urea solution in the urea tank (300) is lower than the liquid level of the urea solution in the inner housing (210), the check valve (240) is in an open state.
2. The bubble interference prevention urea solution quality detection device for vehicles according to claim 1, wherein:
the detection module comprises an ultrasonic transceiver (220) and an ultrasonic reflector (230), wherein the ultrasonic transceiver (220) and the ultrasonic reflector (230) are arranged on the inner shell (210) at intervals to detect the quality of urea solution in the inner shell (210).
3. The bubble interference prevention urea solution quality detection device for vehicles according to claim 2, wherein:
the ultrasonic transceiver (220) and the ultrasonic reflector (230) are arranged at the bottom of the inner shell (210), and ultrasonic waves emitted by the ultrasonic transceiver (220) are emitted to the ultrasonic reflector (230) in the horizontal direction.
4. The bubble interference prevention urea solution quality detection device for vehicles according to claim 2, wherein:
an ultrasonic transmitting port (211) for installing an ultrasonic transceiver is formed in the inner shell (210), an ultrasonic receiving port for installing an ultrasonic reflector is formed in the inner shell (210), and the ultrasonic transmitting port (211) and the receiving port are oppositely arranged in the horizontal direction.
5. The bubble interference prevention urea solution quality detection device for vehicles according to claim 1, wherein:
the outer shell (110) is fixed at the bottom of the urea tank (300), and the inner shell (210) is fixed at the bottom of the outer shell (110).
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| CN202110867813.0A CN113607809B (en) | 2021-07-28 | 2021-07-28 | Automobile-used urea solution quality detection device of anti-bubble interference |
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| CN202110867813.0A CN113607809B (en) | 2021-07-28 | 2021-07-28 | Automobile-used urea solution quality detection device of anti-bubble interference |
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