CN210195891U - Exhaust gas heat exchanger for EGR - Google Patents
Exhaust gas heat exchanger for EGR Download PDFInfo
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- CN210195891U CN210195891U CN201921033059.5U CN201921033059U CN210195891U CN 210195891 U CN210195891 U CN 210195891U CN 201921033059 U CN201921033059 U CN 201921033059U CN 210195891 U CN210195891 U CN 210195891U
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Abstract
The utility model discloses an exhaust heat exchanger of EGR, including cooler, left gas seat and right gas seat, be provided with air inlet and return-air port on the left gas seat, be provided with first total cavity, first distribution cavity and the second distribution cavity of admitting air and return-air cavity on the left gas seat, first distribution cavity of admitting air communicates with the left end of a part of gaseous phase pipeline section of cooler, return-air cavity communicates with the left end of the remaining other part gaseous phase pipeline section of cooler, return-air cavity and second distribution cavity of admitting air communicate with return-air port respectively; the right gas seat is provided with a second total cavity, a first gas outlet distribution cavity and a second gas outlet distribution cavity which are adjacent to the second total cavity, a backflow pipe section is fixed between the left gas seat and the right gas seat, and a left distribution valve core device and a right distribution valve core device are respectively arranged in the first total cavity and the second total cavity. The heat exchanger has three modes to control the temperature of the return air temperature, thereby better controlling the discharge amount of nitrogen oxides.
Description
Technical Field
The utility model relates to an exhaust heat exchanger for among the EGR system of car.
Background
The EGR system is used for cooling the exhaust gas discharged by the engine through a cooler and then returning the cooled exhaust gas to the engine to participate in combustion, so that the combustion temperature is reduced, and the emission of nitrogen oxides is reduced. However, the conventional exhaust heat exchanger has the disadvantage that the exhaust gas discharged from the exhaust pipe directly enters all gas phase pipelines in the cooler and enters the engine after being cooled by the cooler, and in this case, the temperature of the exhaust gas can be controlled only by controlling the cooling efficiency of the cooler to control the return air temperature, and the cooling efficiency of the cooler is difficult to control.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: an EGR exhaust gas heat exchanger is provided having three modes for controlling the return air temperature to better control the amount of nitrogen oxides discharged.
In order to solve the technical problem, the technical scheme of the utility model is that: an exhaust heat exchanger of EGR comprises a cooler, a left air seat and a right air seat which are fixed at the left end and the right end of the cooler, the cooler comprises a plurality of gas phase pipe sections cooled by liquid phase channels, the left gas seat is provided with a gas inlet and a gas return port, the left air seat is provided with a first total chamber communicated with the air inlet, a first air inlet distribution chamber and a second air inlet distribution chamber adjacent to the first total chamber, and an air return chamber, a first air inlet distribution port is arranged between the first air inlet distribution chamber and the first total chamber, a second air inlet distribution port is arranged between the second air inlet distribution chamber and the first total chamber, the first air inlet distribution chamber is communicated with the left end of one part of the gas phase pipe section of the cooler, the air return chamber is communicated with the left end of the other remaining part of the gas phase pipe section of the cooler, and the air return chamber and the second air inlet distribution chamber are respectively communicated with the air return port; the right gas seat is provided with a second total cavity, a first gas outlet distribution cavity and a second gas outlet distribution cavity which are adjacent to the second total cavity, a first gas outlet distribution port is arranged between the second total cavity and the first gas outlet distribution cavity, a second gas outlet distribution port is arranged between the second total cavity and the second gas outlet distribution cavity, the second total cavity is communicated with the right end of one part of the gas phase pipe section of the cooler, the first gas outlet distribution cavity is communicated with the right end of the other part of the gas phase pipe section of the cooler, a return pipe section is fixed between the left gas seat and the right gas seat and is used for communicating the second gas outlet distribution cavity with the return gas cavity, and a left distribution valve core device and a right distribution valve core device which are used for distributing gas are respectively installed in the first total cavity and the second total cavity.
Preferably, the left distributing valve core device comprises a left valve core rotatably mounted on the left air seat, the left valve core is mounted on the left valve core, the left valve core is located in the first main chamber, and the left valve core is driven by the left deflection power device to close the first air inlet distributing port or the second air inlet distributing port.
As a preferable scheme, the right distribution valve core device comprises a right valve shaft rotatably mounted on the right air seat, the right valve shaft is provided with a right valve core, the right valve core is located in the second main chamber, and the right valve shaft is driven by the right deflection swinging force device to close the first air outlet distribution port or the second air outlet distribution port.
Preferably, the return pipe section is arranged in parallel with the gas phase pipe section of the cooler.
Preferably, the deflection angles of the left valve core and the right valve core are both acute angles.
Preferably, the number of the part of the gas phase pipe sections communicated with the first gas inlet distribution chamber is smaller than the number of the remaining part of the gas phase pipe sections.
After the technical scheme is adopted, the utility model discloses an effect is: the exhaust heat exchanger can control opening or closing of a first air inlet distribution port or a second air inlet distribution port and closing of a first air outlet distribution port or a second air outlet distribution port through a left distribution valve core device and a right distribution valve core device, so that exhaust gas recovered from an exhaust pipe has three flow paths, wherein one is that the exhaust gas directly flows back to an engine from a return air port, the other is that a cooler is completely used, the exhaust gas flows back to the engine after being cooled by the cooler, and the last is that the exhaust gas flows back to the engine after being cooled by a part of a gas phase pipe section of the cooler; thus, the exhaust heat exchanger can better control the return temperature and reduce the discharge amount of nitrogen oxides.
And because the return pipe section and the gas phase pipe section of the cooler are arranged in parallel, the volume of the whole exhaust heat exchanger can be made smaller.
And because the deflection angles of the left valve core and the right valve core are acute angles, the deflection angles of the left valve core and the right valve core are smaller, and the mode switching is quicker.
Drawings
The present invention will be further explained with reference to the drawings and examples.
FIG. 1 is a cross-sectional view of an uncooled exhaust of an embodiment of the present invention;
FIG. 2 is a cross-sectional view of exhaust gas passing through a partial cooler in accordance with an embodiment of the present invention;
FIG. 3 is a cross-sectional view of the complete cooling of the exhaust gas of an embodiment of the present invention;
in the drawings: 1. a left air seat; 2. a cooler; 3. a right air seat; 4. an air inlet; 5. an exhaust pipe; 6. a first total chamber; 7. a first air intake distribution port; 8. a left valve shaft; 9. a first inlet distribution chamber; 10. a second air intake distribution port; 11. a left valve core; 12. a second inlet distribution chamber; 13. a return air chamber; 14. a return pipe section; 15. a second overall chamber; 16. a second outlet distribution port; 17. a right valve core; 18. a right valve shaft; 19. a second outlet distribution chamber; 20. a first outlet distribution port; 21. a first outlet gas distribution chamber; 22. and an air return port.
Detailed Description
The present invention will be described in further detail with reference to the following examples.
As shown in fig. 1 to 3, an exhaust gas heat exchanger for EGR includes a cooler 2, and a left air seat 1 and a right air seat 3 fixed at left and right ends of the cooler 2, wherein the cooler 2 includes a plurality of gas phase pipe sections cooled by a liquid phase passage, the left air seat 1 is provided with an air inlet 4 and a return air port 22, the left air seat 1 is provided with a first total chamber 6 communicated with the air inlet 4, a first air inlet distribution chamber 9 and a second air inlet distribution chamber 12 connected with the first total chamber 6, and a return air chamber 13, a first air inlet distribution port 7 is provided between the first air inlet distribution chamber 9 and the first total chamber 6, a second air inlet distribution port 10 is provided between the second air inlet distribution chamber 12 and the first total chamber 6, the first air inlet distribution chamber 9 is communicated with a left end of a portion of the gas phase pipe sections of the cooler 2, and the return air chamber 13 is communicated with a left end of the other remaining portion of the gas phase pipe sections of the cooler 2, the air return chamber 13 and the second air inlet distributor chamber are respectively communicated with an air return port 22; the right air seat 3 is provided with a second total chamber 15, a first outlet distribution chamber 21 and a second outlet distribution chamber which are adjacent to the second total chamber 15, a first outlet distribution port 20 is arranged between the second overall chamber 15 and the first outlet distribution chamber 21, a second outlet distribution port 16 is arranged between the second general chamber 15 and the second outlet distribution chamber 19, the second total chamber 15 is communicated with the right end of the part of the gas phase pipe section of the cooler 2, the first outlet gas distribution chamber 21 is communicated with the right end of the other part of the gas phase pipe section of the cooler 2, a return pipe section 14 is fixed between the left gas holder 1 and the right gas holder 3, the return pipe section 14 connects the second outlet gas distributor chamber with the return gas chamber 13, and a left distribution valve core device and a right distribution valve core device for distributing gas are respectively arranged in the first main chamber 6 and the second main chamber 15. The return pipe section 14 is arranged in parallel with the gas phase pipe section of the cooler 2. The deflection angles of the left valve core 11 and the right valve core 17 are both acute angles. The portion of the gas phase tube sections communicating with the first inlet distribution chamber 9 is less in number than the remaining portion of the gas phase tube sections.
The left distribution valve core device comprises a left valve shaft 8 which is rotatably arranged on the left air seat 1, a left valve core 11 is arranged on the left valve shaft 8, the left valve core 11 is positioned in the first total chamber 6, and the left valve shaft 8 is driven by a left deflection power device to close the first air inlet distribution port 7 or the second air inlet distribution port 10.
The right distribution valve core device comprises a right valve shaft 18 rotatably mounted on the right air seat 3, a right valve core 17 is mounted on the right valve shaft 18, the right valve core 17 is positioned in the second main chamber 15, and the right valve shaft 18 is driven by a right deflection swinging force device to close the first air outlet distribution port 20 or the second air outlet distribution port 16. The left deflection power device and the right deflection power device can be driven by a deflection motor, and the deflection motor is the conventional choice at present.
The utility model provides an exhaust heat exchanger has three kinds of modes: the intake port 4 of the exhaust heat exchanger is connected to the exhaust pipe 5, and the return port 22 is connected to the return pipe of the engine.
As shown in fig. 1, the left valve body 11 swings clockwise to close the first intake distribution port 7, and at this time, the second intake distribution port 10 opens, and at this time, the exhaust gas of the exhaust pipe 5 directly enters the second intake distribution chamber 12 from the first main chamber 6 without being cooled by the cooler 2, and then enters the engine from the return port 22.
As shown in fig. 2, fig. 2 is a schematic diagram of the exhaust gas passing through the partial cooler 2, wherein the left valve core 11 deflects counterclockwise to close the second inlet distribution port 10, and the right valve core 17 deflects counterclockwise to close the first outlet distribution port 20, such that the exhaust gas passes through the first collecting chamber 6, passes through the first inlet distribution port 7, enters the first inlet distribution chamber 9, and then flows into a portion of the gas phase pipe section of the cooler 2, the liquid phase and the gas phase of the cooler 2 perform heat exchange to cool the exhaust gas, and since the portion of the gas phase pipe section of the cooler 2 cools the exhaust gas, the temperature of the exhaust gas entering the engine is lower than that in fig. 1, and then the cooled exhaust gas enters the second collecting chamber 15, then enters the second outlet distribution chamber 19 through the second outlet distribution port 16, and then flows back into the return gas chamber 13 through the return pipe section 14, and returned to the engine through the return port 22.
As shown in fig. 3, fig. 3 is a schematic diagram of the cooler 2 when it is fully used; the left valve core 11 deflects anticlockwise to close the second air inlet distribution port 10, and the right valve core 17 deflects clockwise to close the second air outlet distribution port 16, so that the exhaust gas firstly passes through a part of gas phase pipe section to be cooled, then enters the second total chamber 15, then enters the first air outlet distribution valve through the first air outlet distribution port 20, then passes through the other remaining part of gas phase pipe section to be cooled again, then flows into the air return chamber 13, and finally flows into the engine from the air return port.
The above-mentioned embodiments are merely descriptions of the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and various modifications and alterations made to the technical solution of the present invention without departing from the spirit of the present invention are intended to fall within the scope of the present invention defined by the claims.
Claims (6)
1. The utility model provides a EGR's exhaust gas heat exchanger, includes the cooler and is fixed in left gas holder and the right gas holder at both ends about the cooler, the cooler contains a plurality of and passes through the gaseous phase pipeline section of liquid phase passageway cooling, its characterized in that: the left air seat is provided with an air inlet and an air return port, the left air seat is provided with a first main chamber communicated with the air inlet, a first air inlet distribution chamber and a second air inlet distribution chamber adjacent to the first main chamber, and an air return chamber, a first air inlet distribution port is arranged between the first air inlet distribution chamber and the first main chamber, a second air inlet distribution port is arranged between the second air inlet distribution chamber and the first main chamber, the first air inlet distribution chamber is communicated with the left end of one part of the gas phase pipe section of the cooler, the air return chamber is communicated with the left end of the other part of the remaining gas phase pipe section of the cooler, and the air return chamber and the second air inlet distribution chamber are respectively communicated with the air return port; the right gas seat is provided with a second total cavity, a first gas outlet distribution cavity and a second gas outlet distribution cavity which are adjacent to the second total cavity, a first gas outlet distribution port is arranged between the second total cavity and the first gas outlet distribution cavity, a second gas outlet distribution port is arranged between the second total cavity and the second gas outlet distribution cavity, the second total cavity is communicated with the right end of one part of the gas phase pipe section of the cooler, the first gas outlet distribution cavity is communicated with the right end of the other part of the gas phase pipe section of the cooler, a return pipe section is fixed between the left gas seat and the right gas seat and is used for communicating the second gas outlet distribution cavity with the return gas cavity, and a left distribution valve core device and a right distribution valve core device which are used for distributing gas are respectively installed in the first total cavity and the second total cavity.
2. An EGR exhaust gas heat exchanger as recited in claim 1, wherein: the left distributing valve core device comprises a left valve shaft which is rotatably arranged on the left air seat, a left valve core is arranged on the left valve shaft, the left valve core is positioned in the first main chamber, and the left valve shaft is driven by the left deflection power device to close the first air inlet distributing port or the second air inlet distributing port.
3. An EGR exhaust gas heat exchanger as recited in claim 2, wherein: the right distribution valve core device comprises a right valve shaft which is rotatably arranged on the right air seat, the right valve shaft is provided with a right valve core, the right valve core is positioned in the second main cavity, and the right valve shaft is driven by the right deflection swinging force device to close the first air outlet distribution port or the second air outlet distribution port.
4. An EGR exhaust gas heat exchanger as recited in claim 3, wherein: the return pipe section is arranged in parallel with the gas phase pipe section of the cooler.
5. An EGR exhaust gas heat exchanger as recited in claim 4, wherein: and the deflection angles of the left valve core and the right valve core are acute angles.
6. An EGR exhaust gas heat exchanger as set forth in claim 5, wherein: the portion of the gas phase tube segments communicating with the first inlet distribution chamber is less in number than the remaining portion of the gas phase tube segments.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921033059.5U CN210195891U (en) | 2019-07-04 | 2019-07-04 | Exhaust gas heat exchanger for EGR |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921033059.5U CN210195891U (en) | 2019-07-04 | 2019-07-04 | Exhaust gas heat exchanger for EGR |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210195891U true CN210195891U (en) | 2020-03-27 |
Family
ID=69869104
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921033059.5U Active CN210195891U (en) | 2019-07-04 | 2019-07-04 | Exhaust gas heat exchanger for EGR |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210195891U (en) |
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2019
- 2019-07-04 CN CN201921033059.5U patent/CN210195891U/en active Active
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