CN210033617U - Heat exchanger and engine gas circuit system - Google Patents
Heat exchanger and engine gas circuit system Download PDFInfo
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- CN210033617U CN210033617U CN201922320945.2U CN201922320945U CN210033617U CN 210033617 U CN210033617 U CN 210033617U CN 201922320945 U CN201922320945 U CN 201922320945U CN 210033617 U CN210033617 U CN 210033617U
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- pipeline
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- 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
Abstract
The application discloses heat exchanger, engine gas circuit system, heat exchanger wherein includes: the body is enclosed into a heat exchange inner cavity, and a cooling liquid inlet and a cooling liquid outlet which are communicated with the heat exchange inner cavity are formed in the body; the first pipeline penetrates through the body and is used for guiding the inlet air, and the first pipeline is positioned at the heat exchange part in the heat exchange inner cavity and can enable the inlet air to exchange heat with the medium in the heat exchange inner cavity; and the second pipeline penetrates through the body and is used for guiding the air to be discharged, is positioned at the heat exchange part in the heat exchange inner cavity, and can ensure that the discharged air exchanges heat with the inlet air through the heat exchange with a medium in the heat exchange inner cavity. The heat exchanger can realize heat exchange in various different modes, has more functions, can be suitable for various different installation positions and respectively plays different roles.
Description
Technical Field
The utility model relates to an engine technology field, in particular to heat exchanger, the utility model discloses still relate to an engine gas circuit system who has above-mentioned heat exchanger.
Background
In order to meet increasingly stringent emission regulations, off-board purification techniques, represented by SCR, have been widely developed. However, post-processing such as SCR has high requirements on reaction temperature, and complex and variable working conditions of the whole vehicle pose great challenges to the implementation of exhaust heat management, and how to realize rapid increase of exhaust temperature becomes a key technology for realizing low emission. The rapid increase of the exhaust temperature generally needs to be realized by a heat exchanger, but the heat exchanger arranged in the air path system of the engine at present has different functions and single function according to the difference of the arrangement positions, and cannot be used for realizing the rapid increase of the exhaust temperature.
Meanwhile, the supercharging intercooling technology is widely applied to engines as an effective internal purification technology. However, in the cold start stage, the excessive intervention of the supercharger can improve the air input of low load of the engine, increase the excess air coefficient, and the existence of the intercooler further reduces the exhaust temperature, so that the exhaust temperature of the engine in the low load stage is difficult to rapidly increase, and the aftertreatment such as SCR cannot enter the high-efficiency working temperature as soon as possible.
SUMMERY OF THE UTILITY MODEL
In view of this, the present invention provides a heat exchanger with more diversified functions. The utility model also provides an engine gas circuit system who has above-mentioned heat exchanger.
In order to achieve the above object, the utility model provides a following technical scheme:
a heat exchanger, comprising:
the body is enclosed into a heat exchange inner cavity, and a cooling liquid inlet and a cooling liquid outlet which are communicated with the heat exchange inner cavity are formed in the body;
the first pipeline penetrates through the body and is used for guiding the inlet air, and the first pipeline is positioned at the heat exchange part in the heat exchange inner cavity and can enable the inlet air to exchange heat with the medium in the heat exchange inner cavity;
and the second pipeline penetrates through the body and is used for guiding the air to be discharged, is positioned at the heat exchange part in the heat exchange inner cavity, and can ensure that the discharged air exchanges heat with the inlet air through the heat exchange with a medium in the heat exchange inner cavity.
Preferably, in the heat exchanger, one of the heat exchanging portion of the first tube and the heat exchanging portion of the second tube is a straight tube, and the other is a spiral tube disposed around the straight tube.
Preferably, in the heat exchanger, the heat exchanging portion of the first tube and the heat exchanging portion of the second tube are both bent tubes.
An engine air path system comprising the heat exchanger of any one of the above, further comprising:
the engine air inlet pipeline is used for conveying air to an engine, an intercooler is arranged on the air inlet pipeline, an inlet and an outlet of the first pipeline are communicated with the air inlet pipeline and are respectively positioned on two sides of the intercooler, and therefore the first pipeline and the intercooler are arranged in parallel;
an intake valve for controlling one of the intercooler and the first duct to communicate with the intake duct and the other to be disconnected from the intake duct;
an exhaust conduit for discharging the engine exhaust; the exhaust pipeline is communicated with an inlet of the first pipeline and an inlet of the second pipeline through a first communication pipeline;
the air outlet valve is used for controlling one of the first pipeline and the second pipeline to be communicated with the first communication pipeline, and the other one of the first pipeline and the second pipeline to be disconnected with the first communication pipeline;
a cooling conduit for cooling the engine, the coolant inlet and the coolant outlet communicating with the cooling conduit to enable the coolant to flow through the heat exchange cavity;
and the switch valve is used for controlling the on-off of the heat exchange inner cavity and the cooling pipeline.
Preferably, in the engine air path system, a supercharger is disposed on the exhaust duct, and a communication portion between the first communication duct and the exhaust duct is located upstream of the supercharger.
Preferably, in the engine air path system, an outlet of the second duct is communicated with the exhaust duct through a second communicating duct, and the communicating portion is located downstream of the supercharger.
Preferably, in the above air path system of the engine, the air intake valve is a reversing valve disposed at a communicating portion between the air intake duct and the inlet of the first duct.
Preferably, in the air path system of the engine, the air outlet valve is a reversing valve and is disposed at a communication position between the first communication pipeline and the inlet of the first pipeline and between the first communication pipeline and the inlet of the second pipeline.
The utility model provides a heat exchanger, first pipeline and second pipeline that has the body and pass the body, the heat transfer inner chamber that the body encloses can make the coolant liquid get into wherein, when the coolant liquid flows in heat transfer inner chamber, it can with the interior gas inlet of first pipeline and/or give vent to anger in the second pipeline and carry out the heat transfer, and when the coolant liquid does not enter into heat transfer inner chamber, can realize the heat transfer between giving vent to anger in the gas inlet of first pipeline and the second pipeline, thereby make heat exchanger can realize between the coolant liquid and admit air, between the coolant liquid and give vent to anger, the coolant liquid, admit air and give vent to anger between, admit air and give vent to anger heat between, make heat exchanger have more functions, can be applicable to the mounted position of multiple difference and play different effects respectively.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic diagram of a heat exchanger according to an embodiment of the present invention;
fig. 2 is a schematic diagram of an engine gas circuit system provided in an embodiment of the present invention;
FIG. 3 is a schematic diagram of the engine gas circuit system in a normal operating mode;
FIG. 4 is a schematic illustration of the engine air circuit system in a heating mode.
In the above fig. 1-4:
1-body, 2-cooling liquid inlet, 3-cooling liquid outlet, 4-first pipeline, 5-second pipeline, 6-engine, 7-air inlet pipeline, 8-intercooler, 9-air inlet valve, 10-exhaust pipeline, 11-first communicating pipeline, 12-second communicating pipeline, 13-air outlet valve, 14-cooling pipeline, 15-switch valve and 16-supercharger.
Detailed Description
The utility model provides a heat exchanger, it has more diversified function. The utility model also provides an engine gas circuit system who has above-mentioned heat exchanger.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1, an embodiment of the present invention provides a heat exchanger, which can be applied to a gas path system of an engine to realize rapid increase of exhaust temperature. The heat exchanger mainly comprises a body 1, a first pipeline 4 and a second pipeline 5, wherein the body 1 encloses a heat exchange inner cavity, and the body 1 is provided with a cooling liquid inlet 2 and a cooling liquid outlet 3 which are communicated with the heat exchange inner cavity, namely the body 1 can be regarded as a pipeline which is used for guiding cooling liquid and has a larger inner cavity; a first pipe 4 for guiding intake air (intake air in this embodiment refers to gas that can enter the engine 6 and participate in the operation of the engine 6, and it may be fresh air or EGR exhaust gas) and a second pipe 5 for guiding exhaust air (exhaust air in this embodiment refers to exhaust gas that is exhausted from the engine 6 and does not participate in the operation of the engine 6) both pass through the body 1, and in this embodiment, a part of the first pipe 4 and the second pipe 5 that are located in the heat exchange inner cavity is referred to as a heat exchange part, that is, the heat exchange part can realize heat exchange between the gas located inside and a medium located outside (i.e., in the heat exchange inner cavity), that is, the medium is a substance filled in the heat exchange inner cavity, for example, the medium may be cooling liquid that enters and exits the heat exchange inner cavity through the cooling liquid inlet 2 and the cooling liquid outlet 3, that is, the heat exchanger provided in this embodiment can realize cooling of the intake air, or, the medium may also be air, that is, the cooling liquid inlet 2 and the cooling liquid outlet 3 are closed, so that the cooling liquid does not enter the heat exchange inner cavity any more, and further, the outlet air with higher temperature in the second pipeline 5 can heat the inlet air with lower temperature in the first pipeline 4 by an air heat transfer mode (i.e., thermal radiation).
Therefore, the heat exchanger can realize heat exchange between cooling liquid and inlet air, between cooling liquid and outlet air, between cooling liquid, inlet air and outlet air, between inlet air and outlet air and the like in different modes, has more functions, can be suitable for different installation positions and respectively plays different roles, and can be used for realizing rapid lifting of exhaust temperature and the like.
As shown in fig. 1, it is preferable that one of the heat exchange portion of the first tube 4 and the heat exchange portion of the second tube 5 is a straight tube, and the other is a spiral tube disposed around the straight tube. Because the heat exchanger that this embodiment provided can be used for realizing the heat transfer between the gas in first pipeline 4 and the gas in second pipeline 5, so in order to further improve the heat transfer effect under this kind of circumstances, preferably set up one into the straight tube, another sets up the spiral pipe that surrounds the straight tube to make between the two can also have bigger heat transfer area when being close to, make the heat radiation can be more abundant, timely realization.
In addition, the heat exchange portion of the first pipe 4 and the heat exchange portion of the second pipe 5 may be both bent pipes. Both of the two are set into the bent pipe, so that the distribution length of the bent pipe in the heat exchange inner cavity can be increased, the heating area is increased, and the heat exchange effect is further improved.
As shown in fig. 2 to 4, the present embodiment further provides an engine air path system, which includes not only the above-mentioned heat exchanger, but also mainly includes an intake duct 7 for supplying air to the engine 6, and a cooling duct 14 for discharging an exhaust gas generated by the engine 6 to cool the engine 6, when the heat exchanger cooperates with the above-mentioned ducts, an inlet and an outlet of the first duct 4 are respectively communicated with different portions of the intake duct 7, and an intercooler 8 disposed on the intake duct 7 is disposed between the inlet and the outlet of the first duct 4, that is, the first duct 4 is disposed in parallel with the intercooler 8; the intake valve 9 is used to control the communication between the intake duct 7 and the intercooler 8 or the first duct 4, that is, by controlling the intake valve 9, one of the intercooler 8 and the first duct 4 can be communicated with the intake duct 7 and the other can be disconnected from the intake duct 7 at different stages, for example, when the intake valve 9 keeps the first duct 4 communicated with the intake duct 7, the intercooler 8 is not communicated with the intake duct 7, that is, the intercooler 8 is bypassed and cannot work, as shown in fig. 4; when the inlet valve 9 is operated again, the charge air cooler 8 can be brought into communication with the inlet duct 7, while the first duct 4 is disconnected from the inlet duct 7, as shown in fig. 3; the exhaust pipeline 10 is communicated with a first communicating pipeline 11, the exhaust pipeline 10 can be communicated with the first pipeline 4 and the second pipeline 5 through the communication of the first communicating pipeline 11, specifically, in different working stages, the exhaust pipeline 10 is communicated with one of the first pipeline 4 and the second pipeline 5, while the other is not communicated, and the switching between the communicated state and the disconnected state is realized through an air outlet valve 13, namely, the air outlet valve 13 is used for controlling the communication between the first communicating pipeline 11 and the first pipeline 4 or the second pipeline 5; the cooling liquid inlet 2 and the cooling liquid outlet 3 of the heat exchanger are communicated with the cooling pipeline 14, so that the cooling liquid can flow through the heat exchange inner cavity to realize the cooling on the inlet air and/or the outlet air, and the on-off of the heat exchange inner cavity and the cooling pipeline 14 is realized under the control of the switch valve 15.
The engine gas circuit system can rapidly increase the exhaust temperature according to the running state of the whole vehicle, thereby realizing the optimal heat management effect and improving the emission of the whole vehicle.
Specifically, the operation mode of the engine gas circuit system includes a normal operation mode and a heating mode of the engine 6:
in the normal operation mode, as shown by the arrow in fig. 3, the intake pipe 7 is communicated with the branch of the intercooler 8 by controlling the intake valve 9, and the pressurized fresh air passes through the intercooler 8 and finally enters the engine 6; controlling the air outlet valve 13 to enable the exhaust pipeline 10 to be communicated with the first pipeline 4, so that exhaust gas discharged by the engine 6 is guided into the first pipeline 4, simultaneously opening the switch valve 15 to enable cooling water of the engine 6 to enter a heat exchange inner cavity and cool the exhaust gas in the first pipeline 4, wherein the heat exchanger plays the same role as an EGR cooler, namely, the engine adopts the conventional supercharging intercooling and EGR technology under the condition;
in the heating mode, as shown by the arrows in fig. 4, the intake valve 9 is made to communicate the intake duct with the first duct 4, and is disconnected from the intercooler 8, and the pressurized fresh air is introduced into the first duct 4 and finally into the engine 6; the air outlet valve 13 communicates the exhaust pipeline 10 with the second pipeline 5, high-temperature exhaust gas discharged from the engine 6 is introduced into the second pipeline 5, the switch valve 15 is closed simultaneously so that cooling water does not enter the heat exchange inner cavity, at the moment, the high-temperature exhaust gas in the second pipeline 5 can heat fresh air in the first pipeline 4 in the heat exchange inner cavity in a heat radiation mode, and the discharge effect realized at the moment mainly comprises the following two parts: the intercooler 8 is bypassed, so that the pressurized fresh air is not cooled and directly enters the engine 6, the air inlet temperature is increased, and the exhaust temperature can be increased; by further heating the fresh air with the high-temperature exhaust gas, the intake air temperature can be raised again, and the exhaust temperature is continuously raised.
As shown in fig. 2 to 4, in the present embodiment, it is preferable that the exhaust pipe 10 is provided with the supercharger 16, and the communication portion between the first communication pipe 11 and the exhaust pipe 10 is located upstream of the supercharger 16 (the upstream and the downstream are both relative to the flow direction of the exhaust gas in the exhaust pipe 10). So set up, can not flow to booster 16 for the high temperature waste gas that heats for fresh air, realized the part bypass to booster 16, reduced booster 16 rotational speed, reduced the air input, and then reduced the excess air coefficient under the low-load, further promoted the exhaust temperature.
As shown in fig. 2 to 4, the outlet of the second duct 5 communicates with the exhaust duct 10 through a second communication duct 12, and the communication site is located downstream of the supercharger 16. The high temperature exhaust gas flowing through the second duct 5, after heating the fresh air, can be discharged through a separate exhaust gas outlet communicating with the second duct 5, but this arrangement affects the exhaust effect of the engine 6, so it is preferable to return this part of the exhaust gas to the exhaust duct 10 downstream of the supercharger 16 through the second communicating duct 12.
Specifically, in the present embodiment, it is also preferable that the intake valve 9 is a reversing valve disposed at a communication portion between the intake duct 7 and the inlet of the first duct 4; the gas outlet valve 13 is also a direction change valve and is provided at a communication portion of the first communicating pipe 11 with the inlet of the first pipe 4 and the inlet of the second pipe 5, as shown in fig. 2 to 4. The valve is preferably a reversing valve, one of the two pipelines can be closed and the other pipeline can be opened simultaneously through one valve, and the two pipelines are not required to be provided with switch valves, so that the number of the valves is reduced. And the selection of the positions can realize the switching of different gases in different pipelines in time and improve the working performance of the gas circuit system of the engine.
The structure of each part is described in a progressive mode in the specification, the structure of each part is mainly described to be different from the existing structure, and the whole and partial structures of the heat exchanger and the engine gas circuit system can be obtained by combining the structures of the parts.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. 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 invention. Thus, the present invention 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 (8)
1. A heat exchanger, comprising:
the body is enclosed into a heat exchange inner cavity, and a cooling liquid inlet and a cooling liquid outlet which are communicated with the heat exchange inner cavity are formed in the body;
the first pipeline penetrates through the body and is used for guiding the inlet air, and the first pipeline is positioned at the heat exchange part in the heat exchange inner cavity and can enable the inlet air to exchange heat with the medium in the heat exchange inner cavity;
and the second pipeline penetrates through the body and is used for guiding the air to be discharged, is positioned at the heat exchange part in the heat exchange inner cavity, and can ensure that the discharged air exchanges heat with the inlet air through the heat exchange with a medium in the heat exchange inner cavity.
2. The heat exchanger of claim 1, wherein one of the heat exchanging portion of the first tube and the heat exchanging portion of the second tube is a straight tube, and the other is a spiral tube disposed around the straight tube.
3. The heat exchanger of claim 1, wherein the heat exchange portion of the first conduit and the heat exchange portion of the second conduit are both elbows.
4. An engine air circuit system comprising the heat exchanger of any one of claims 1-3, further comprising:
the engine air inlet pipeline is used for conveying air to an engine, an intercooler is arranged on the air inlet pipeline, an inlet and an outlet of the first pipeline are communicated with the air inlet pipeline and are respectively positioned on two sides of the intercooler, and therefore the first pipeline and the intercooler are arranged in parallel;
an intake valve for controlling one of the intercooler and the first duct to communicate with the intake duct and the other to be disconnected from the intake duct;
an exhaust conduit for discharging the engine exhaust; the exhaust pipeline is communicated with an inlet of the first pipeline and an inlet of the second pipeline through a first communication pipeline;
the air outlet valve is used for controlling one of the first pipeline and the second pipeline to be communicated with the first communication pipeline, and the other one of the first pipeline and the second pipeline to be disconnected with the first communication pipeline;
a cooling conduit for cooling the engine, the coolant inlet and the coolant outlet communicating with the cooling conduit to enable the coolant to flow through the heat exchange cavity;
and the switch valve is used for controlling the on-off of the heat exchange inner cavity and the cooling pipeline.
5. The engine air path system as claimed in claim 4, wherein a supercharger is arranged on the exhaust pipeline, and the communication position of the first communication pipeline and the exhaust pipeline is located at the upstream of the supercharger.
6. The engine air circuit system as claimed in claim 5, wherein the outlet of the second conduit is in communication with the exhaust conduit via a second communication conduit, and the communication location is downstream of a supercharger.
7. The engine air path system of claim 4, wherein the intake valve is a reversing valve disposed at a communication location of the intake conduit and the inlet of the first conduit.
8. The engine gas circuit system according to claim 4, wherein the gas outlet valve is a reversing valve and is disposed at a communication portion of the first communication pipeline and the inlet of the first pipeline and the inlet of the second pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922320945.2U CN210033617U (en) | 2019-12-23 | 2019-12-23 | Heat exchanger and engine gas circuit system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922320945.2U CN210033617U (en) | 2019-12-23 | 2019-12-23 | Heat exchanger and engine gas circuit system |
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| Publication Number | Publication Date |
|---|---|
| CN210033617U true CN210033617U (en) | 2020-02-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922320945.2U Active CN210033617U (en) | 2019-12-23 | 2019-12-23 | Heat exchanger and engine gas circuit system |
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|---|---|
| CN (1) | CN210033617U (en) |
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2019
- 2019-12-23 CN CN201922320945.2U patent/CN210033617U/en active Active
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