CN108131967B

CN108131967B - Tail gas heat exchange device and vehicle using same

Info

Publication number: CN108131967B
Application number: CN201810106451.1A
Authority: CN
Inventors: 高志男; 高品佳
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-02-02
Filing date: 2018-02-02
Publication date: 2024-05-14
Anticipated expiration: 2038-02-02
Also published as: CN108131967A

Abstract

The invention relates to a tail gas heat exchange device and a vehicle using the same, and relates to the field of vehicle tail gas utilization. The technical scheme mainly adopted is as follows: the tail gas heat exchange device comprises a shell pipe and a heat exchanger with a heat exchange pipe; the shell pipe is sleeved on the heat exchanger, and a gap is formed between the shell pipe and the outer wall of the heat exchanger so as to form an air passing channel between the shell pipe and the outer wall of the heat exchanger; wherein, tail gas heat transfer device has at least two kinds of states: in a first state, the heat exchange tube is opened, and external tail gas flows into the heat exchange tube to exchange heat in the heat exchanger; in the second state, the heat exchange tube is closed, and external tail gas flows into the gas passing channel to flow out through the gas passing channel. According to the technical scheme provided by the invention, the shell pipe is assembled on the heat exchanger in a sleeving manner, and the air passing channel is formed between the shell pipe and the heat exchanger, so that the tail gas heat exchange device has the technical effect of convenient assembly, and the whole tail gas heat exchange device can be made into a round shape, so that the structure is relatively simple, and the tail gas heat exchange device is convenient to process.

Description

Tail gas heat exchange device and vehicle using same

Technical Field

The invention relates to the technical field of vehicle tail gas utilization, in particular to a tail gas heat exchange device and a vehicle using the same.

Background

When an engine of a vehicle works, a large amount of heat is contained in tail gas, and in order to reduce energy waste, the heat in the tail gas of the vehicle is generally recycled through a tail gas heat exchange device. However, the structure of the existing tail gas heat exchange device is generally relatively complex, and the processing and the installation are not convenient enough, so that the tail gas heat exchange device with relatively simple structure and convenient processing and installation is required to be designed.

Disclosure of Invention

In view of the above, the invention provides a tail gas heat exchange device which has a relatively simple structure and is convenient to process and install.

The invention also provides a vehicle using the tail gas heat exchange device.

In order to achieve the above purpose, the present invention mainly provides the following technical solutions:

In one aspect, embodiments of the present invention provide an exhaust gas heat exchange device comprising a shell and tube and a heat exchanger having heat exchange tubes; the shell pipe is sleeved on the heat exchanger, and a gap is formed between the shell pipe and the outer wall of the heat exchanger so as to form an air passing channel between the shell pipe and the outer wall of the heat exchanger;

wherein, tail gas heat transfer device has at least two kinds of states:

In a first state, the heat exchange tube is opened, and external tail gas flows into the heat exchange tube to exchange heat in the heat exchanger; in the second state, the heat exchange tube is closed, and external tail gas flows into the gas passing channel to flow out through the gas passing channel.

The aim and the technical problems of the invention can be further realized by adopting the following technical measures.

In the foregoing exhaust gas heat exchange device, optionally, the heat exchanger includes a heat exchanger core, and the heat exchange tube is disposed on the heat exchanger core;

wherein, the outer side wall of the heat exchanger core is provided with a heat insulation layer.

In the foregoing exhaust gas heat exchange device, optionally, the heat insulating layer includes at least one of an air layer, a heat insulating material layer, and a vacuum layer.

In the foregoing exhaust gas heat exchange device, optionally, when the heat insulating layer includes an air layer, the air layer has a pressure release hole.

In the foregoing exhaust gas heat exchange device, optionally, the heat exchanger further includes an air inlet pipe communicating with the air inlet of the heat exchange pipe;

the air inlet pipe penetrates through the opening at one end of the shell pipe, and a first air passing hole is formed in a pipe section of the air inlet pipe, which is positioned in the shell pipe, so that external tail gas flows into the air passing channel through the first air passing hole in the second state.

In the foregoing exhaust gas heat exchange device, optionally, the exhaust gas heat exchange device further includes a valve mechanism, where the valve mechanism includes an air outlet;

The valve mechanism is used for opening the heat exchange tube and closing the gas passing channel in the first state so that the tail gas of the heat exchange tube is discharged from the gas outlet; and closing the heat exchange tube and opening the gas passing channel in the second state so that the tail gas of the gas passing channel is discharged from the gas outlet.

In the foregoing exhaust gas heat exchange device, optionally, the valve mechanism includes a housing and a valve core;

the shell is provided with a first air inlet, a second air inlet and the air outlet; the first air inlet is communicated with the air outlet of the heat exchange tube; the second air inlet is communicated with the air outlet of the air passing channel;

The valve core can move relative to the shell, and is used for opening the first air inlet and closing the second air inlet when moving to a first position so that the first air inlet is communicated with the air outlet; and closing the first air inlet and opening the second air inlet when moving to the second position, so that the second air inlet is communicated with the air outlet.

In the foregoing exhaust gas heat exchange device, optionally, the heat exchanger further includes an air outlet cavity that is communicated with the air outlet of the heat exchange tube, and the first air inlet is communicated with the air outlet of the heat exchange tube through the air outlet cavity;

and/or the second air inlet is communicated with the air outlet of the air passing channel.

In the foregoing exhaust heat exchange device, optionally, the valve core is a push-pull valve core, and is configured to be driven to move to the first position or the second position along a linear track;

or the valve core is a rotary valve core and is used for being driven to rotate to the first position and the second position.

In another aspect, an embodiment of the present invention further provides a vehicle, which includes any one of the exhaust gas heat exchange devices described above.

By means of the technical scheme, the tail gas heat exchange device and the vehicle using the same have the following beneficial effects:

In the technical scheme provided by the invention, the shell and tube are assembled on the heat exchanger in a sleeving manner, and the air passing channel is formed between the shell and tube, so that the tail gas heat exchange device has the technical effect of convenient assembly, and the whole tail gas heat exchange device can be made into a round shape, and has a relatively simple structure and is convenient to process.

The foregoing description is only an overview of the present invention, and is intended to provide a better understanding of the present invention, as it is embodied in the following description, with reference to the preferred embodiments of the present invention and the accompanying drawings.

Drawings

Fig. 1 is a schematic structural diagram of an exhaust gas heat exchange device according to an embodiment of the present invention;

FIG. 2 is a half cross-sectional view of an exhaust heat exchange device according to an embodiment of the present invention;

FIG. 3 is a half cross-sectional view of a first embodiment of the present invention providing a valve mechanism including a shell and tube with a first view angle when concealing the outlet tube;

FIG. 4 is a half cross-sectional view of a valve mechanism including a shell and tube according to a second view of the first example of the present invention when concealing an outlet tube;

FIG. 5 is an enlarged partial cross-sectional view of a seal provided by a first example of the invention;

FIG. 6 is a schematic illustration of a valve mechanism not including a housing tube provided in accordance with a first example of the present invention;

FIG. 7 is a schematic view of the structure of a housing of a valve mechanism provided by a first example of the present invention;

FIG. 8 is a schematic illustration of the structure of a second valve plate of a valve mechanism provided by a first example of the present invention;

FIG. 9 is a half cross-sectional view of an exhaust heat exchange device employing a valve train in a second example, provided by the present invention;

FIG. 10 is a schematic structural view of a radial rotary seal valve mechanism provided by a second example of the present invention;

FIG. 11 is a half cross-sectional view of a radial rotary seal valve mechanism according to a second example of the present invention from a first perspective with the outlet tube hidden;

FIG. 12 is a half cross-sectional view of a radial rotary seal valve mechanism according to a second example of the present invention from a second perspective with the outlet tube hidden;

FIG. 13 is a schematic illustration of the construction of a first valve plate of a radial rotary seal valve mechanism provided by a second example of the present invention;

FIG. 14 is a schematic illustration of the construction of a second valve plate of a radial rotary seal valve mechanism provided by a second example of the present invention;

FIG. 15 is a half cross-sectional view of an exhaust gas heat exchange device employing a valve train in a third example, provided by the present invention;

FIG. 16 is a front view of a rotary valve mechanism not including a housing tube provided by a third example of the present invention;

FIG. 17 is a side view of a rotary valve mechanism not including a housing tube provided by a third example of the present invention;

FIG. 18 is a half cross-sectional view of a first perspective of a rotary valve mechanism incorporating a housing tube provided by a third example of the present invention;

FIG. 19 is a half cross-sectional view of a second view of a rotary valve mechanism incorporating a housing tube according to a third example of the present invention;

Fig. 20 is a schematic structural view of a spool of a rotary valve mechanism provided in a third example of the present invention.

Reference numerals: 1. a shell tube; 2. a heat exchanger; 21. an air inlet pipe; 211. a first air passing hole; 22. a heat exchanger core; 221. a thermal insulation layer; 23. a heat exchange tube; 24. an air outlet cavity; 3. a gas passage; 4. a valve mechanism; 5. a housing; 501. a shell plate; 51. a first air inlet; 52. a second air inlet; 53. an air outlet; 6. a valve core; 61. a first valve plate; 611. a first capping region; 612. a first via region; 62. a second valve plate; 621. a second air passing hole; 622. a first via; 6210. a second capping region; 6220. a second via region; 7. an actuator; 71. a seal; 701. a first layer; 702. a second layer; 7011. a first tensile collar; 7012. a second tensile collar; 8. a push-pull member; 10. a bearing; 101. a first bearing; 20. a push rod; 30. a bracket; 40. another bracket; 50. a rotating shaft; 100. and a tail gas heat exchange device.

Detailed Description

In order to further describe the technical means and effects adopted for achieving the preset aim of the invention, the following detailed description refers to the specific implementation, structure, characteristics and effects according to the application of the invention with reference to the accompanying drawings and preferred embodiments. In the following description, different "an embodiment" or "an embodiment" do not necessarily refer to the same embodiment. Furthermore, the particular features, structures, or characteristics of one or more embodiments may be combined in any suitable manner.

As shown in fig. 1 and 2, an embodiment of the present invention provides an exhaust gas heat exchange apparatus 100, which includes a shell tube 1 and a heat exchanger 2 having a heat exchange tube 23. The shell tube 1 is sleeved on the heat exchanger 2, and a gap is formed between the shell tube and the outer wall of the heat exchanger 2 so as to form an air passing channel 3 between the shell tube and the outer wall of the heat exchanger. The external exhaust gas can thus pass both through the overgas channel 3 and through the heat exchange tubes 23 of the heat exchanger 2.

Wherein the exhaust gas heat exchange device 100 has at least two states: in the first state, the heat exchange tube 23 is opened, and the external tail gas flows into the heat exchange tube 23 to exchange heat in the heat exchanger 2; in the second state, the heat exchange tube 23 is closed and the external exhaust gas flows into the gas passage 3 to flow out through the gas passage 3. Specifically, in a cold environment such as winter, the exhaust gas heat exchange device 100 may be in the first state, and at this time, the exhaust gas of the vehicle may enter the heat exchange tube 23 to exchange heat, so as to utilize heat contained in the exhaust gas, for example, to heat the vehicle interior. In hot environments such as summer, the exhaust gas heat exchange device 100 can be in the second state, the heat exchange tube 23 is closed at this time, and external exhaust gas flows into the air passage 3 and is directly discharged to the atmosphere.

In the above-mentioned technical scheme that provides, because shell pipe 1 assembles on heat exchanger 2 through the mode that the cover was established, and forms the air passage 3 between the two to have the technical effect of convenient assembly, and tail gas heat transfer device 100 wholly can make circularly, and its structure is simpler relatively, and processing is more convenient.

As shown in fig. 2, the aforementioned heat exchanger 2 includes a heat exchanger core 22, and heat exchange tubes 23 are provided on the heat exchanger core 22. The heat exchanger core 22 may be circular in shape. Specifically, the heat exchanger core 22 has an inner cavity. The heat exchange tube 23 passes through the inner cavity of the heat exchanger core 22 and forms a flow passage with the inner cavity wall of the heat exchanger core 22. The heat exchanger 2 further comprises an inlet and an outlet communicating with the through-flow channel. The heat exchange liquid such as water can flow into the flow passage from the inlet and exchange heat with the tail gas in the heat exchange tube 23, and the water after heat exchange flows out from the outlet. The heat-exchanged water can utilize the heat contained in the water after flowing out from the outflow port, thereby achieving the purpose of utilizing the heat in the tail gas.

As shown in fig. 2, the heat insulation layer 221 may be disposed on the outer side wall of the heat exchanger core 22, so that the high-temperature tail gas in the gas passing channel 3 may exchange heat with the heat exchange liquid, such as water, in the heat exchanger core 22 via the outer wall of the heat exchanger core 22 when heat exchange is not needed, and the water is easily gasified at high temperature, so that the pressure in the heat exchanger core 22 is increased, and thus the heat exchanger core 22 is easily broken. In this example, the heat insulating layer 221 can well eliminate the potential safety hazard.

The heat insulating layer 221 may include at least one of an air layer, a heat insulating material layer, and a vacuum layer. The heat insulating material layer may be a heat insulating felt or the like.

In one specific application example, the heat insulating layer 221 includes an air layer, and the air layer may have a pressure release hole. The pressure relief hole can be a blind hole so as to reduce the flow of air and prevent an air layer from exchanging heat with tail gas through the pressure relief hole. If the pressure relief hole is not formed, the air expands after the air layer is heated, so that the pressure in the air layer is increased, and the potential safety hazard is caused. In this example, the pressure in the air layer can be kept at a safe level through the pressure relief holes, so that the safety performance is better.

What needs to be explained here is: the heat insulating layer 221 may be an air layer or a heat insulating material layer, or a vacuum layer or a heat insulating material layer, and the number of each layer may be one or two or more.

As shown in fig. 2, the aforementioned heat exchanger 2 further includes an intake pipe 21 communicating with an intake port of the heat exchange pipe 23. Wherein one end opening of the casing 1 has a shape adapted to the outer shape of the air inlet pipe 21. The air inlet pipe 21 penetrates through one end opening of the shell pipe 1 and is in sealing fit with the shell pipe 1. A first gas passing hole 211 is provided in a pipe section of the intake pipe 21 located in the casing 1 so that external exhaust gas flows into the gas passing channel 3 through the first gas passing hole 211 in the second state. In this example, the external exhaust gas can only enter the exhaust gas heat exchanging device 100 through the air inlet pipe 21, and the exhaust gas heat exchanging device 100 has only one air inlet, namely, the air inlet of the air inlet pipe 21, so that the exhaust gas heat exchanging device 100 is conveniently connected with the exhaust gas outlets of the vehicle engine in a one-to-one correspondence manner through the air inlet pipe 21.

Further, as shown in fig. 2, the exhaust gas heat exchange apparatus 100 of the present invention may further include a valve mechanism 4, where the valve mechanism 4 includes an air outlet 53. Wherein the valve mechanism 4 is used for opening the heat exchange tube 23 and closing the gas passing channel 3 in the first state, so that the tail gas of the heat exchange tube 23 is discharged from the gas outlet 53; and closing the heat exchange tube 23 and opening the gas passing passage 3 in the second state, so that the exhaust gas of the gas passing passage 3 is discharged from the gas outlet 53. In this example, no matter what state the exhaust gas heat exchanging apparatus 100 is in, the exhaust gas inside can be discharged from only one air outlet, that is, from the air outlet 53 of the valve mechanism 4, so that the exhaust gas emission can be conveniently controlled.

Further, as shown in fig. 2, the valve mechanism 4 described above may include a housing 5 and a valve spool 6. The housing 5 is provided with a first air inlet 51, a second air inlet 52 and the aforementioned air outlet 53. The first air inlet 51 communicates with the air outlet of the heat exchange tube 23. The second air inlet 52 communicates with the air outlet of the overgas passage 3. The valve core 6 is movable relative to the housing 5, and is used for opening the first air inlet 51 and closing the second air inlet 52 when moving to the first position, so that the first air inlet 51 is communicated with the air outlet 53; and when moved to the second position, the first air inlet 51 is closed, and the second air inlet 52 is opened, so that the second air inlet 52 communicates with the air outlet 53. Wherein by the arrangement of the present example, the valve mechanism 4 is formed as a separate module, which is convenient to process and assemble.

As shown in fig. 2, the heat exchanger 2 further includes an air outlet chamber 24 communicating with the air outlet of the heat exchange tube 23. The aforementioned first air inlet 51 communicates with the air outlet of the heat exchange tube 23 through the air outlet chamber 24.

The valve element 6 may be a push-pull valve element, and is configured to be driven to move along a linear track to the first position and the second position. Alternatively, the valve element 6 is a rotary valve element, and is configured to be driven to rotate to the first position and the second position.

In the first example, the following is specifically exemplified by the spool 6 as a push-pull spool:

In this first example, as shown in fig. 2-4, the valve mechanism 4 may also include a push-pull member 8. The push-pull member 8 is connected with the valve core 6. The push-pull member 8 is used for being driven to drive the valve core 6 to move to the first position and the second position along the linear track, so that different air inlets are communicated with the air outlets 53, and the tail gas heat exchange device 100 is in different states.

Wherein, through setting up push-and-pull spare 8 and driving case 6 along linear trajectory motion to open and shut first air inlet 51 and second air inlet 52, it is relatively convenient that it controls.

What needs to be explained here is: FIGS. 3 and 4 show a schematic structural view of a push-pull valve mechanism with a shell-and-tube; FIG. 6 shows a schematic structural view of a push-pull valve mechanism without a shell and tube; fig. 7 is a schematic view of the housing of the push-pull valve train of fig. 6. Wherein, for the convenience of the valve mechanism of the present invention being connected with the heat exchanger, the push-pull valve mechanism of the present invention is preferably selected from the valve mechanisms with shell and tube in fig. 3 and 4.

In order to save labor, the valve mechanism 4 may further include a driving device connected to the push-pull member 8 to drive the push-pull member 8 to move, so that the push-pull member 8 drives the valve core 6 to move along the linear track to the first position or the second position. Preferably, as shown in fig. 2, the driving device includes an actuator 7, and the actuator 7 is connected to the push-pull member 8 to drive the push-pull member 8 to move.

Preferably, the driving device is installed at the outer side of the housing 5 to facilitate installation, and corrosion of the driving device by high-temperature exhaust gas can be reduced.

Further, as shown in fig. 3 and 4, the aforementioned valve spool 6 may include a first valve plate 61 to open and close the first intake port 51 through the first valve plate 61. The first valve plate 61 is connected to the push-pull member 8 to open and close the first air inlet 51 under the driving of the push-pull member 8.

As shown in fig. 2, the aforementioned first valve plate 61 is located in the outlet chamber 24 between the first inlet port 51 and the heat exchange tube 23, and the first valve plate 61 is opposed to the first inlet port 51. When the first valve plate 61 moves to a position away from the first intake port 51 by the push-pull member 8, the first valve plate 61 opens the first intake port 51. When the first valve plate 61 moves to a position close to the first intake port 51 by the push-pull member 8, the first valve plate 61 closes the first intake port 51.

Further, as shown in fig. 3 and 4, the aforementioned valve spool 6 may include a second valve plate 62 to open and close the second intake port 52 through the second valve plate 62. The first valve plate 61 and the second valve plate 62 cooperate with each other to control opening and closing of different air inlets, and have a technical effect of convenient control.

As shown in fig. 3 and 4, the aforementioned second valve plate 62 may be located in the housing 5, and the second valve plate 62 is in sealing engagement with the inner wall of the housing 5 in the circumferential direction. As shown in fig. 8, the second valve plate 62 is provided with a second air passing hole 621. Wherein the first air inlet 51 communicates with the air outlet 53 through the second air passing hole 621 when the valve body 6 moves to the first position, and the second air inlet 52 communicates with the air outlet 53 through the second air passing hole 621 when the valve body 6 moves to the second position. In this example, the first air inlet 51 and the second air inlet 52 are facilitated to communicate with the air outlet 53 through the second air passing hole 621 provided on the second valve plate 62.

Preferably, as shown in fig. 3 and 4, the second valve plate 62 described above is opposed to the second intake port 52. When the second valve plate 62 moves to a position away from the second intake port 52, the second valve plate 62 opens the second intake port 52. When the second valve plate 62 moves to a position close to the second intake port 52, the second valve plate 62 closes the second intake port 52.

Further, as shown in fig. 7, the number of the second air inlets 52 may be two or more, and may be arranged around the circumference of the housing 5.

Further, as shown in fig. 8, the aforementioned second valve plate 62 may be provided with a first through hole 622. The push-pull member 8 passes through the first through hole 622 and is fixed opposite to the second valve plate 62. The number of the second air holes 621 may be more than two and may be disposed around the first via hole 622. In this example, the increase in the number of the second gas passing holes 621 may improve the gas passing efficiency.

Further, one end of the push-pull member 8 passes through the housing 5 and is fixedly connected to the first valve plate 61.

What needs to be explained here is: the first valve plate 61 and/or the second valve plate 62 may be provided with a seal 71. For convenience of distinction, the seal 71 provided on the first valve plate 61 may be taken as a first seal, and the seal 71 on the second valve plate 62 may be taken as a second seal. The first valve plate 61 may move the first sealing member to cooperate with the first sealing member to cover the first air intake port 51 when the valve spool 6 moves to the second position. Likewise, the second valve plate 62 may also move the second sealing member to cover the second air intake 12 with the second sealing member when the valve element 6 moves to the first position. When the valve core 6 drives the sealing element 71 to cover the corresponding air inlet, the sealing element 71 can be deformed by being extruded in the thickness direction.

As shown in fig. 5, the sealing member 71 may be a layered structure. Each layer of the seal 71 is made of a heat resistant material, such as a stainless steel sheet. The temperature of the tail gas of the vehicle is 600-700 ℃, so that the heat-resistant material can at least resist the high temperature of 600-700 ℃. In the present example, since each layer of the seal 71 is made of a heat-resistant material, it can withstand the high temperature of the exhaust gas. Because the sealing element 71 is of a layered structure, and when the valve core 6 drives the sealing element 71 to cover the corresponding air inlet, the sealing element 71 can deform when being extruded in the thickness direction, so that the unevenness caused by processing errors of the surface of the corresponding air inlet can be compensated, the sealing element 71 can be tightly attached to the surface of the corresponding air inlet when being extruded, the technical effect of covering the corresponding air inlet is achieved, and the phenomenon of air leakage of the corresponding air inlet when the valve core is closed can be effectively prevented.

In addition, by providing the seal 71 in a layered form, there is also a technical effect of vibration reduction to reduce noise.

Further, the aforementioned seal 71 may be formed by stacking stainless steel sheets, so that the layered structure of the seal 71 is formed by the stainless steel sheets. In other words, each layer of the aforementioned seal 71 may be a stainless steel sheet.

Each of the layers of the aforementioned seal 71 may be sheet-like and have a thickness of 0.1mm to 0.2mm.

Further, a gap may be formed between two adjacent layers of the sealing member 71, mainly due to a machining error of the surface of the corresponding air inlet, so that the surface of the air inlet is uneven, when the sealing member 71 is closed relative to the surface of the air inlet, a part between the two layers of the sealing member is completely stuck, and a part is provided with a gap, so that a tiny gap is formed between two adjacent layers of stainless steel sheets, and the gap can compensate the unevenness of the surface of the corresponding air inlet caused by the machining error, so that the sealing member 71 is pressed to be closely attached to the surface of the corresponding air inlet, thereby further preventing the air leakage phenomenon of the corresponding air inlet when the sealing member is closed.

Further, as shown in fig. 5, the aforementioned seal 71 has a first layer 701. The first layer 701 has opposite first and second sides. The first side has a first tensile collar 7011. When the valve element 6 drives the sealing member 71 to cover the corresponding air inlet (such as the first air inlet 51), the first side is close to the corresponding air inlet relative to the second side, and the projection of the corresponding air inlet on the first layer 701 is located inside the first stretching convex ring 7011. In the following, the air inlet is taken as a first air inlet for illustration, when the valve core 6 drives the sealing element 71 on the first valve plate 61, that is, the first sealing element 71 to cover the first air inlet 51, the first side of the first layer 701 is close to the first air inlet 51 relative to the second side, and the projection of the first air inlet 51 on the first layer 701 is located inside the first stretching convex ring 7011. In this example, the first stretching convex ring 7011 can be deformed sufficiently when being pressed to be closely attached to the surface of the first air inlet 51, so that the outside of the first air inlet 51 can be sealed, and the effect of preventing the air leakage of the first air inlet 51 can be achieved.

Further, as shown in fig. 5, the first side further has a second stretching convex ring 7012, and the second stretching convex ring 7012 is located inside the first stretching convex ring 7011. When the valve core 6 drives the sealing member 71 to cover the corresponding air inlet (such as the second air inlet 52), the projection of the corresponding air inlet on the first layer 701 is located between the first stretching convex ring 7011 and the second stretching convex ring 7012. In the following, the air inlet is taken as the second air inlet 52 for illustration, when the valve core 6 drives the sealing element 71 on the second valve plate 62, that is, the second sealing element 71 covers the second air inlet 52, the projection of the second air inlet 52 on the first layer 701 is located between the first stretching convex ring 7011 and the second stretching convex ring 7012. In this example, both the first and second tensile collars 7011, 7012 may deform sufficiently to abut the face of the second air inlet 52 when compressed. Further, because the projection of the second air inlet 52 onto the first layer 701 is located between the first tensile collar 7011 and the second tensile collar 7012, air leakage from the second air inlet 52 can be further prevented.

What needs to be explained here is: as shown in fig. 5, the aforementioned first and second tensile collars 7011, 7012 are positioned inside the first layer 701, i.e., the first and second tensile collars 7011, 7012 are each spaced from the edges of the first layer 701, which facilitates sufficient deformation of the first and second tensile collars 7011, 7012 when compressed.

Further, as shown in fig. 5, the number of the first layers 701 may be more than two, and a second layer 702 having a flat plate shape may be interposed between two adjacent first layers 701. The first and second tensile collars 7011, 7012 on the first layer 701 may deform sufficiently when abutted against the planar second layer 702 to further assist the seal 71 in abutting engagement with the respective inlet opening, such that the seal 71 seals against the respective inlet opening to further prevent air leakage from the respective inlet opening when closed.

Further, the valve mechanism 4 may further include a guide portion for guiding the movement of the push-pull member 8 to improve the movement accuracy of the push-pull member 8.

As shown in fig. 3 and 4, the aforementioned guide may include a bearing 10 provided on the housing 5. The push-pull member 8 has a shaft portion adapted to the bearing 10. The push-pull member 8 passes through the bearing 10 via the shaft portion to move in a linear path with respect to the bearing 10.

Further, as shown in fig. 7, the bearing 10 includes a first bearing 101, and the number of the first air inlets 51 is two or more and is disposed around the first bearing 101.

As shown in fig. 7, the foregoing housing 5 may include a shell plate 501, and the shell plate 501 may be a flat plate. The first air inlet 51 and the second air inlet 52 may be disposed on the shell plate 501, which has the technical effect of convenient processing. In one example, the number of the first air inlets 51 and the second air inlets 52 is two or more, and the shell plate 501 has the first bearing 101 through which the shaft portion of the push-pull member 8 passes. The first air inlet 51 and the second air inlet 52 are both disposed around the first bearing 101, and the second air inlet 52 is located on a side of the first air inlet 51 away from the first bearing 101. As shown in fig. 2, the aforementioned first valve plate 61 is located in the outlet chamber 24 of the heat exchanger 2 and is connected to the push-pull member 8 passing through the first bearing 101 so as to move under the drive of the push-pull member 8. The other end of the push-pull member 8 extends from the other side of the housing 5 and is connected to a driving device such as an actuator 7.

In the second example, the following is a specific example of the radially rotary sealing type spool 6:

In this second example, as shown in fig. 9 to 11, the first air intake port 51 and the second air intake port 52 are each opposite to the spool 6, and the second air intake port 52 is located in the radial direction of the spool 6, so that the spool 6 can open and close the second air intake port 52 through its outer side wall when rotating.

Wherein, the opening and closing control of the first air inlet 51 and the second air inlet 52 is realized by arranging the rotatable valve core 6, and the control is relatively convenient.

Further, as shown in fig. 11 and 12, the aforementioned valve spool 6 may include a first valve plate 61. The valve spool 6 opens and closes the first intake port 51 through the first valve plate 61. Specifically, when the first valve plate 61 is rotated to a different position, the first air intake port 51 can be opened and closed, and the control thereof is relatively convenient.

Further, the aforementioned first valve plate 61 may have first and second sides that are opposite. The aforementioned first intake port 51 is opposite to the first side of the first valve plate 61. As shown in fig. 13, the first side of the first valve plate 61 has a first cover region 611 and a first through hole region 612. When the valve spool 6 rotates the first valve plate 61 to the second position, the first cover region 611 closes the first intake port 51. When the valve core 6 drives the first valve plate 61 to rotate to the first position, the first cover region 611 moves away from the first air inlet 51, and the first through hole region 612 is opposite to the first air inlet 51, so that the first air inlet 51 communicates with the air outlet 53 through the first through hole region 612.

As shown in fig. 10, the number of the first air inlets 51 may be two or more, and may be provided around the axis of the valve body 6. Wherein, the number of the first through hole areas 612 and the first cover areas 611 is equal to that of the first air inlets 51, and the first through hole areas 612 and the first cover areas 611 are sequentially staggered around the axis of the valve core 6. In the present example, by increasing the number of the first air inlets 51, the air intake efficiency of the first air inlets 51 is facilitated to be improved.

Further, as shown in fig. 11 and 12, the aforementioned valve spool 6 may include a second valve plate 62. The valve element 6 opens and closes the second intake port 52 through the second valve plate 62. The first valve plate 61 and the second valve plate 62 cooperate with each other to control opening and closing of different air inlets, and have a technical effect of convenient control.

As shown in fig. 14, the aforementioned second valve plate 62 may have a cylindrical shape. The second intake port 52 is opposite to the side wall of the second valve plate 62. The second valve plate 62 has a second cover region 6210 and a second through-hole region 6220 on a side wall thereof. Wherein, when the valve core 6 drives the second valve plate 62 to rotate to the first position, the second cover region 6210 closes the second air inlet 52. When the spool 6 rotates the second valve plate 62 to the second position, the second cover region 6210 is moved away from the second air inlet port 52, and the second through hole region 6220 is opposite to the second air inlet port 52, so that the second air inlet port 52 communicates with the air outlet port 53 through the second through hole region 6220.

As shown in fig. 10, the number of the second air inlets 52 may be two or more and may be disposed around the axis of the valve plate. Wherein, the second through hole area 6220 and the second cover area 6210 are equal in number to the second air inlet 52, and are sequentially staggered around the axis of the valve core 6. In the present example, by increasing the number of the second intake ports 52, the intake efficiency of the second intake ports 52 is facilitated to be improved.

Further, as shown in fig. 11 and 12, the valve mechanism 4 of the present invention may further include a rotation shaft 50 and a bracket 30 for supporting the rotation shaft 50. Wherein the valve core 6 is rotated by the rotation shaft 50.

In a specific application example, as shown in fig. 11 and 12, the aforementioned bracket 30 is provided inside the housing 5. The rotary shaft 50 is fixedly connected with the first valve plate 61. The second valve plate 62 is sleeved on the rotating shaft 50 through the other bracket 40 and is fixed relative to the rotating shaft 50.

Further, the valve core 6 may be fixed relative to the rotating shaft 50. As shown in fig. 10, the valve mechanism 4 of the present invention further includes a push rod 20, one end of the push rod 20 is connected to the rotating shaft 50, and the other end extends out of the housing 5. The pushing rod 20 is used for being driven to rotate the pushing rotating shaft 50 so as to drive the valve core 6 to move to the first position and the second position.

In order to save labor, the valve mechanism 4 may further comprise a driving device, and the driving device is connected with the push rod 20 to drive the push rod 20 to move, so that the push rod 20 drives the rotating shaft 50 and the valve core 6 to rotate. Preferably, the driving means comprises an actuator coupled to the push rod 20 to drive the push rod 20 in motion.

In the third example, the following is specifically exemplified by the spool 6 as a rotary spool:

In this third example, as shown in fig. 15 to 20, the first air intake port 51 and the second air intake port 52 are each opposite to the spool 6, so that the spool 6 can open and close the first air intake port 51 and the second air intake port 52 through the outer surfaces thereof when rotating.

What needs to be explained here is: FIGS. 16 and 17 show a schematic structural view of a rotary valve mechanism without a shell and tube; fig. 18 and 19 show a schematic structural view of a rotary valve mechanism with a shell-and-tube. Among them, for convenience of connection of the valve mechanism of the present invention to the heat exchanger, the rotary valve mechanism of the present invention is preferably selected from the valve mechanisms with the shell and tube in fig. 18 and 19.

Preferably, the valve element 6 may be plate-shaped for easy processing.

Further, as shown in fig. 15, the first air inlet 51 and the second air inlet 52 may be located on the same side of the valve element 6, so that the valve mechanism 4 is conveniently connected directly to the exhaust gas heat exchange device 100, and the assembled volume may be saved.

As shown in fig. 20, the aforementioned first intake port 51 may be opposite to the first side of the spool 6. The first side of the valve core 6 has a first cap region 611 and a first through-hole region 612. When the spool 6 rotates to the second position, the first cover region 611 closes the first intake port 51. When the valve spool 6 is rotated to the first position, the first cover region 611 is moved away from the first air intake port 51, and the first through hole region 612 is opposed to the first air intake port 51, so that the first air intake port 51 communicates with the air outlet port 53 through the first through hole region 612.

As shown in fig. 16, the number of the first air inlets 51 may be two or more, and may be provided around the rotation center line of the valve body 6. Wherein, the first through hole area 612 and the first cover area 611 are equal in number to the first air inlets 51, and are sequentially staggered around the rotation center line of the valve core 6. In the present example, by increasing the number of the first air inlets 51, the air intake efficiency of the first air inlets 51 is facilitated to be improved.

Further, the aforementioned second air inlet 52 may also be opposite to the first side of the valve core 6. As shown in fig. 20, the first side of the valve cartridge 6 has a second cover region 6210 and a second through-hole region 6220. When the spool 6 rotates to the first position, the second cover region 6210 closes the second intake port 52. When the spool 6 is rotated to the second position, the second cover region 6210 is moved away from the second air inlet port 52 and the second through-hole region 6220 is opposed to the second air inlet port 52, causing the second air inlet port 52 to communicate with the air outlet port 53 through the second through-hole region 6220.

As shown in fig. 16, the number of the second air inlets 52 may be two or more, and may be provided around the rotation center line of the spool 6. Wherein, the second through hole area 6220 and the second cover area 6210 are equal in number to the second air inlet 52, and are sequentially staggered around the rotation center line of the valve core 6. In the present example, by increasing the number of the second intake ports 52, the intake efficiency of the second intake ports 52 is facilitated to be improved.

Further, as shown in fig. 16, the aforementioned second air inlet 52 may be provided around the first air inlet 51.

As shown in fig. 18 and 19, the valve mechanism 4 may further include a rotation shaft 50 and a bracket 30 for supporting the rotation shaft 50. The rotating shaft 50 is connected to the valve core 6 to drive the valve core 6 to move to the first position and the second position.

Further, the valve mechanism 4 may also include a push rod. One end of the push rod is connected with the rotating shaft 50, and the other end of the push rod extends out of the shell 5 and is used for being driven to push the rotating shaft 50 to rotate so as to drive the valve core 6 to move to the first position and the second position.

In order to save labor, the valve mechanism 4 may further comprise a driving device, and the driving device is connected with the pushing rod to drive the pushing rod to move, so that the pushing rod drives the rotating shaft 50 and the valve core 6 to rotate. Preferably, the driving means comprises an actuator connected to the push rod for driving the push rod in motion.

Embodiments of the present invention also provide a vehicle that may include the exhaust heat exchange device 100 of any of the examples described above. The heat in the tail gas can be utilized by the vehicle through the tail gas heat exchange device 100, so that energy is saved, and energy waste is prevented.

What needs to be explained here is: under the condition of no conflict, the technical features related to the examples can be combined with each other according to actual situations by a person skilled in the art so as to achieve corresponding technical effects, and specific details of the combination situations are not described in detail herein.

The above description is only of the preferred embodiments of the present invention, and is not intended to limit the present invention in any way, but any simple modification, equivalent variation and modification made to the above embodiments according to the technical substance of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. The tail gas heat exchange device is characterized by comprising a shell pipe (1) and a heat exchanger (2) with a heat exchange pipe (23); the shell tube (1) is sleeved on the heat exchanger (2), and a gap is formed between the shell tube and the outer wall of the heat exchanger (2) so as to form an air passing channel (3) between the shell tube and the outer wall of the heat exchanger;

wherein, tail gas heat transfer device has at least two kinds of states:

In a first state, the heat exchange tube (23) is opened, and external tail gas flows into the heat exchange tube (23) to exchange heat in the heat exchanger (2); in a second state, the heat exchange tube (23) is closed, and external tail gas flows into the gas passing channel (3) to flow out through the gas passing channel (3);

The heat exchanger (2) comprises a heat exchanger core (22), and a heat exchange tube (23) is arranged on the heat exchanger core (22); the heat exchanger core (22) is provided with an inner cavity, and the heat exchange tube (23) passes through the inner cavity of the heat exchanger core (22) and forms a flow passage with the inner cavity wall of the heat exchanger core (22); the heat exchanger (2) also comprises an inlet and an outlet which are communicated with the flow passage; the heat exchange liquid flows into the flow passage from the flow inlet and exchanges heat with the tail gas in the heat exchange tube (23);

The heat exchanger (2) further comprises an air inlet pipe (21) communicated with the air inlet of the heat exchange pipe (23); wherein, the opening at one end of the shell tube (1) is provided with a shape which is matched with the shape of the air inlet tube (21), the air inlet tube (21) passes through the opening at one end of the shell tube (1), a first air passing hole (211) is arranged on the tube section of the air inlet tube (21) positioned in the shell tube (1), so that external tail gas flows into the air passing channel (3) through the first air passing hole (211) in the second state;

Wherein the tail gas heat exchange device further comprises a valve mechanism (4), and the valve mechanism (4) comprises an air outlet (53); the valve mechanism (4) is used for opening the heat exchange tube (23) and closing the air passing channel (3) in the first state so that the tail gas of the heat exchange tube (23) is discharged from the air outlet (53); and closing the heat exchange tube (23) and opening the gas passing channel (3) in the second state, so that the tail gas of the gas passing channel (3) is discharged from the gas outlet (53);

The valve mechanism (4) comprises a shell (5) and a valve core (6); the shell (5) is provided with a first air inlet (51), a second air inlet (52) and the air outlet (53); the first air inlet (51) is communicated with an air outlet (53) of the heat exchange tube (23); the second air inlet (52) is communicated with an air outlet (53) of the air passing channel (3); the valve core (6) can move relative to the shell (5) and is used for opening the first air inlet (51) and closing the second air inlet (52) when moving to a first position, so that the first air inlet (51) is communicated with the air outlet (53); and closing the first air inlet (51) and opening the second air inlet (52) when moving to a second position, bringing the second air inlet (52) into communication with the air outlet (53);

The valve core (6) comprises a first valve plate (61) so as to open and close the first air inlet (51) through the first valve plate (61); the first valve plate (61) is connected with the push-pull piece (8) so as to open and close the first air inlet (51) under the drive of the push-pull piece (8); the first valve plate (61) is positioned in the air outlet cavity (24) between the first air inlet (51) and the heat exchange tube (23), and the first valve plate (61) is opposite to the first air inlet (51); when the first valve plate (61) moves to a position far away from the first air inlet (51) under the drive of the push-pull piece (8), the first valve plate (61) opens the first air inlet (51); when the first valve plate (61) moves to a position close to the first air inlet (51) under the drive of the push-pull piece (8), the first valve plate (61) closes the first air inlet (51);

The valve core (6) comprises a second valve plate (62) so as to open and close the second air inlet (52) through the second valve plate (62); the second valve plate (62) is positioned in the shell (5), and the second valve plate (62) is in sealing fit with the inner wall of the shell (5) along the circumferential direction; the second valve plate (62) is provided with a second air passing hole (621); the first air inlet (51) is communicated with the air outlet (53) through a second air passing hole (621) when the valve core (6) moves to the first position, and the second air inlet (52) is communicated with the air outlet (53) through the second air passing hole (621) when the valve core (6) moves to the second position.

2. The tail gas heat exchange device according to claim 1, wherein,

The heat exchanger core (22) has a heat insulating layer (221) on the outer side wall thereof.

3. The tail gas heat exchange device according to claim 2, wherein,

The heat insulating layer (221) includes at least one of an air layer, a heat insulating material layer, and a vacuum layer.

4. The tail gas heat exchange device according to claim 3, wherein,

When the insulating layer (221) includes an air layer, the air layer has a pressure relief hole.

5. The tail gas heat exchange device according to claim 1, wherein,

The heat exchanger (2) further comprises an air outlet cavity (24) communicated with the air outlet of the heat exchange tube (23), and the first air inlet (51) is communicated with the air outlet of the heat exchange tube (23) through the air outlet cavity (24);

And/or the second air inlet (52) is communicated with the air outlet of the air passing channel (3).

6. The tail gas heat exchange device according to claim 1, wherein,

The valve core (6) is a push-pull valve core and is used for being driven to move to the first position or the second position along a linear track;

Or the valve core (6) is a rotary valve core and is used for being driven to rotate to the first position and the second position.

7. A vehicle comprising an exhaust gas heat exchange device according to any one of claims 1 to 6.