EGR cooler and engine system

Abstract

The utility model discloses an EGR cooler and an engine system, and relates to the technical field of cooling. The EGR cooler comprises a shell, a cooling core, an elastic supporting piece, an air inlet chamber and an air outlet chamber. The cooling core is arranged in an inner cavity of the shell, one end of the cooling core is communicated with the air inlet chamber, the other end of the cooling core is communicated with the air outlet chamber, the air inlet chamber and the air outlet chamber are both connected with the shell, the air inlet chamber is used for inputting high-temperature waste gas into the cooling core, and the elastic supporting piece is connected between the cooling core and the shell. The elastic supporting piece is used for generating elastic deformation when the cooling core vibrates or is heated to deform. Compared with the prior art, the EGR cooler has the advantages that due to the fact that the elastic supporting piece which is connected to the cooling core and abuts against the shell is adopted, heat deformation of the cooling core can be effectively supported and buffered, cracking and failure are avoided, the service life is long, and safety is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to cooling technical field, specifically, relate to a kind of EGR cooler and engine system. BACKGROUND

[0002] At present, with the increasingly stringent emission regulations, EGR (exhaust gas recirculation system) cooler is more and more widely used in engine, and the requirement of engine to EGR cooler is also higher and higher. But the cooling core in the EGR cooler will be deformed by heat in use process, and even cracking failure may occur, affecting the service life.

[0003] Therefore, it is particularly important to design and manufacture an EGR cooler with good supporting effect and long service life, especially in engine production. SUMMARY

[0004] The utility model discloses a kind of EGR coolers, can effectively support and buffer the deformation of cooling core by heat, avoid cracking failure, long service life, strong safety.

[0005] Another purpose of the utility model is to provide a kind of engine system, can effectively support and buffer the deformation of cooling core by heat, avoid cracking failure, long service life, strong safety.

[0006] The utility model is implemented by using the following technical solutions.

[0007] An EGR cooler, comprising a shell, a cooling core, an elastic support, an air inlet chamber and an air outlet chamber, the cooling core is arranged in the internal cavity of the shell, one end of the cooling core is communicated with the air inlet chamber, the other end is communicated with the air outlet chamber, the air inlet chamber and the air outlet chamber are connected with the shell, the air inlet chamber is used to input high-temperature exhaust gas into the cooling core, the elastic support is connected between the cooling core and the shell, and the elastic support is used to elastically deform when the cooling core vibrates or deforms by heat.

[0008] Optionally, the cooling core comprises a first cooling core, an air connection box and a second cooling core, the first cooling core is connected with the second cooling core through the air connection box, the first cooling core is communicated with the air inlet chamber, the second cooling core is communicated with the air outlet chamber, the flexibility of the first cooling core is greater than that of the second cooling core, the elastic support is connected with the air connection box or the second cooling core, and is abutted with the shell.

[0009] Optionally, the elastic support comprises a mounting ring and a spring buckle, the spring buckle is connected with the mounting ring, the mounting ring is sleeved outside the air connection box or the second cooling core, and the spring buckle is abutted with the shell; or the elastic support is in honeycomb ring shape, the elastic support is sleeved outside the air connection box or the second cooling core, and is abutted with the shell.

[0010] Optionally, the number of elastic buckles is multiple, and the multiple elastic buckles are arranged on the mounting ring at intervals and collectively surround the gas receiving box or the second cooling core.

[0011] Optionally, the distance between the elastic support and the gas receiving box is less than or equal to half the length of the second cooling core.

[0012] Optionally, the gas receiving box comprises a first connecting disc and a second connecting disc, the first connecting disc is connected with the first cooling core, and the second connecting disc is connected with the second cooling core; the first connecting disc is covered outside the second connecting disc, the elastic support is arranged in a ring shape and is integrally formed outside the first connecting disc; or the second connecting disc is covered outside the first connecting disc, the elastic support is arranged in a ring shape and is integrally formed outside the second connecting disc.

[0013] Optionally, the gas receiving box comprises a first connecting disc and a second connecting disc, the first connecting disc is connected with the first cooling core, and the second connecting disc is connected with the second cooling core; the first connecting disc is covered outside the second connecting disc, the elastic support is arranged in a ring shape and is integrally formed outside the first connecting disc; or the second connecting disc is covered outside the first connecting disc, the elastic support is arranged in a ring shape and is integrally formed outside the second connecting disc.

[0014] Optionally, the first cooling core comprises a plurality of first cooling pipes, the plurality of first cooling pipes are arranged at intervals and are connected to one side of the gas receiving box; the second cooling core comprises a plurality of second cooling pipes, the plurality of second cooling pipes are arranged at intervals and are connected to the other side of the gas receiving box; the first cooling pipe is in a thread shape, a corrugated shape, a circular tube shape or a dotted circular tube shape, and the second cooling pipe is in a straight pipe shape; the gas receiving box comprises a first connecting disc and a second connecting disc, the first connecting disc is connected with the second connecting disc and collectively surrounds the transition cavity.

[0015] Optionally, the shell is provided with an inlet and an outlet at intervals along the extension direction thereof, the inlet is arranged close to the air inlet chamber, the outlet is arranged close to the air outlet chamber, the inlet is used for allowing the cooling medium to enter, and the outlet is used for allowing the cooling medium to be discharged.

[0016] An engine system comprises the EGR cooler, the EGR cooler comprising a shell, a cooling core, an elastic support, an air inlet chamber and an air outlet chamber, the cooling core is arranged in the internal cavity of the shell, one end of the cooling core is communicated with the air inlet chamber, the other end of the cooling core is communicated with the air outlet chamber, the air inlet chamber and the air outlet chamber are connected with the shell, the air inlet chamber is used for inputting high-temperature exhaust gas into the cooling core, the elastic support is connected between the cooling core and the shell, and the elastic support is used for elastically deforming when the cooling core vibrates or is deformed by heat.

[0017] The EGR cooler and the engine system provided by the utility model have the following beneficial effects:

[0018] The EGR cooler provided by the utility model, the cooling core is arranged in the shell, one end of the cooling core is communicated with the air inlet chamber, the other end is communicated with the air outlet chamber, the air inlet chamber and the air outlet chamber are connected with the shell, the air inlet chamber is used for inputting high-temperature exhaust gas into the cooling core, the elastic supporting piece is connected on the cooling core and is abutted with the shell, and the elastic supporting piece is used for elastically deforming when the cooling core is deformed by heat.

[0019] The engine system provided by the utility model can effectively support and buffer the heat deformation of the cooling core, avoids the cracking failure, has long service life and high safety. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the utility model, and should not be regarded as the limitation to the scope, and for the ordinary skilled in the art, other related drawings can be obtained without the creative labor on the premise of the drawings.

[0021] Figure 1 The cross-sectional view of the EGR cooler provided by the first embodiment of the utility model;

[0022] Figure 2 The structure schematic view of the connection between the cooling core and the elastic supporting piece in the EGR cooler provided by the first embodiment of the utility model;

[0023] Figure 3 The structure schematic view of the cooling core in the EGR cooler provided by the first embodiment of the utility model;

[0024] Figure 4 The structure schematic view of the connection between the cooling core and the elastic supporting piece in the EGR cooler provided by the second embodiment of the utility model;

[0025] Figure 5 The structure schematic view of the integral forming of the elastic supporting piece and the first connecting disc in the EGR cooler provided by the third embodiment of the utility model;

[0026] Figure 6 The structure schematic view of the cooling core in the EGR cooler provided by the fourth embodiment of the utility model;

[0027] Figure 7 The Figure 6An exploded view of the snap connection of the first connecting plate and the second connecting plate.

[0028] Icon: 100 - EGR cooler; 110 - shell; 111 - inlet; 112 - outlet; 113 - internal cavity; 120 - cooling core; 121 - first cooling core; 1211 - first cooling pipe; 122 - air box; 1221 - first connecting plate; 1222 - second connecting plate; 1223 - transition cavity; 1224 - snap slot; 123 - second cooling core; 1231 - second cooling pipe; 130 - elastic support; 131 - mounting ring; 132 - elastic buckle; 140 - air inlet chamber; 150 - air outlet chamber. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.

[0031] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0032] In the description of the present application, it should be noted that the directions or position relationships indicated by the terms "inner", "outer", "upper", "lower", "horizontal", etc. are based on the directions or position relationships shown in the drawings, or the directions or position relationships in which the product of the present application is usually placed, which are only for the convenience of describing the present application and simplifying the description, and are not intended to indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0033] In the description of the utility model, still need explaining, unless another explicit provision and limitation, term " set " " link " " install " " connect " should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can pass through intermediate medium indirectly connected, can be two elements inside the communication.For ordinary skilled in the art, can understand the concrete meaning of the above terms in the utility model according to specific circumstances.

[0034] The utility model provides some implementation manners, which will be described in detail below in combination with the drawings.In the case of no conflict, the features in the following examples can be combined with each other.

[0035] First embodiment

[0036] Please refer to Figures 1 to 3 The utility model provides a kind of engine system (not shown in figure), for providing kinetic energy.It can effectively support and buffer the thermal deformation of cooling core 120, avoid the occurrence of cracking failure, long service life, strong safety.

[0037] It should be noted that the engine system includes an EGR cooler 100 and an engine body (not shown in figure).The EGR cooler 100 is connected to the engine body, which is used to provide kinetic energy.The EGR cooler 100 is used to optimize the combustion process of the engine body by reducing the temperature of the recirculated exhaust gas, thereby achieving the purpose of emission reduction, efficiency improvement and protection of the engine body.

[0038] The EGR cooler 100 comprises a shell 110, a cooling core 120, an elastic support 130, an air inlet chamber 140 and an air outlet chamber 150. The cooling core 120 is arranged in the shell 110, which is used to shield and protect the cooling core 120. One end of the cooling core 120 is communicated with the air inlet chamber 140, and the other end is communicated with the air outlet chamber 150. The air inlet chamber 140 is used to input high-temperature exhaust gas into the cooling core 120, the cooling core 120 is used to cool the high-temperature exhaust gas, and the air outlet chamber 150 is used to discharge the cooled exhaust gas. The air inlet chamber 140 and the air outlet chamber 150 are connected with the shell 110 to realize the fixation of the overall structure of the EGR cooler 100 and ensure the structural stability. The elastic support 130 is connected between the cooling core 120 and the shell 110 (the elastic support 130 can be connected on the cooling core 120 and abut against the shell 110, or connected on the inner wall of the shell 110 and abut against the cooling core 120, or abut against both the cooling core 120 and the shell 110), which is used to elastically deform when the cooling core 120 vibrates or is deformed by heat, so as to effectively support and buffer the vibration or heat deformation of the cooling core 120, avoid the cracking failure, prolong the service life of the EGR cooler 100 and improve the safety.

[0039] Further, the shell 110 is provided with an inlet 111 and an outlet 112 along the extension direction thereof. The inlet 111 is arranged close to the air inlet chamber 140, and the outlet 112 is arranged close to the air outlet chamber 150. The inlet 111 is used for the cooling medium to enter, and the outlet 112 is used for the cooling medium to be discharged. Specifically, the shell 110 has an internal cavity 113, and the cooling core 120 is arranged in the internal cavity 113. During the cooling process of the EGR cooler 100, the air inlet chamber 140 inputs high-temperature exhaust gas into the cooling core 120, and at the same time, the cooling medium enters the internal cavity 113 from the inlet 111 to fill the internal cavity 113. In this process, the cooling medium exchanges heat with the high-temperature exhaust gas in the cooling core 120 to realize the cooling function of the high-temperature exhaust gas. The cooled exhaust gas is discharged outward through the air outlet chamber 150, and the heat-exchanged and heated cooling medium is discharged from the outlet 112. In this way, the liquid cooling of the high-temperature exhaust gas can be realized, and the cooling effect is good and the cooling efficiency is high.

[0040] The cooling core 120 comprises a first cooling core 121, a gas connecting box 122 and a second cooling core 123. The first cooling core 121 is connected with the second cooling core 123 through the gas connecting box 122, the first cooling core 121 communicates with the gas inlet chamber 140, the second cooling core 123 communicates with the gas outlet chamber 150, the high-temperature exhaust gas from the gas inlet chamber 140 flows into the gas outlet chamber 150 through the first cooling core 121, the gas connecting box 122 and the second cooling core 123 in sequence, in the process, the cooling medium in the internal cavity 113 preliminarily cools the high-temperature exhaust gas through the first cooling core 121, the cooling medium in the internal cavity 113 secondarily cools the exhaust gas after the preliminary cooling through the second cooling core 123, and the cooling effect is further improved through the two cooling processes.

[0041] Further, the flexibility of the first cooling core 121 is greater than that of the second cooling core 123, the first cooling core 121 can elastically deform under the action of thermal stress without being damaged, the second cooling core 123 will have a small deformation or even no deformation under the action of thermal stress, and will not be damaged. Specifically, the high-temperature exhaust gas entering the first cooling core 121 from the gas inlet chamber 140 has the highest temperature, at this time, the first cooling core 121 can release the stress generated by thermal expansion through its own deformation to avoid the cracking and failure of the first cooling core 121, and the temperature of the high-temperature exhaust gas after being cooled by the first cooling core 121 is reduced, and the second cooling core 123 will not cause cracking and failure. In other words, in the process of cooling the high-temperature exhaust gas by the EGR cooler 100, the first cooling core 121 will deform to drive the second cooling core 123 to move in the internal cavity 113 through the gas connecting box 122, so that the entire cooling core 120 is deformed by heat.

[0042] In the embodiment, the elastic support 130 is connected with the second cooling core 123 (the elastic support 130 cannot be directly connected with the first cooling core 121 because the first cooling core 121 needs to deform), and abuts against the shell 110, the elastic support 130 can support and buffer the second cooling core 123 to limit the first cooling core 121 through the gas connecting box 122, prevent the first cooling core 121 from excessive deformation, improve the shock resistance of the entire cooling core 120, avoid cracking and failure, prolong the service life, and improve the safety.

[0043] The elastic support 130 comprises a mounting ring 131 and elastic buckles 132. The elastic buckles 132 are connected with the mounting ring 131, the mounting ring 131 is sleeved outside the second cooling core 123, the mounting ring 131 is used for fixing the relative position of the elastic support 130 and the second cooling core 123, so as to prevent the elastic support 130 from being displaced relative to the second cooling core 123, and the elastic buckles 132 abut against the shell 110, so as to realize the support and buffering functions of the second cooling core 123. In the process of deformation of the cooling core 120 due to heat, the elastic buckles 132 are elastically deformed, so as to buffer the cooling core 120, avoid rigid contact between the cooling core 120 and the shell 110, and improve the safety.

[0044] Specifically, the number of the elastic buckles 132 is multiple, the multiple elastic buckles 132 are arranged on the mounting ring 131 in a spaced manner, and are collectively arranged outside the second cooling core 123, and the multiple elastic buckles 132 collectively act to buffer the cooling core 120 from various directions, further avoid rigid contact between the cooling core 120 and the shell 110, and ensure the safety.

[0045] In the embodiment, the elastic support 130 comprises the mounting ring 131 and the elastic buckles 132 connected with the mounting ring 131, but is not limited thereto. In other embodiments, the elastic support 130 can also be a honeycomb ring, at this time, the elastic support 130 is sleeved outside the air receiving box 122 or the second cooling core 123, and abuts against the shell 110, and the shape of the elastic support 130 is not limited.

[0046] In the embodiment, the second cooling core 123 is in a rectangular body shape, the mounting ring 131 is in a rectangular ring shape, the shape of the mounting ring 131 matches the shape of the second cooling core 123, and the mounting ring 131 is sleeved outside the second cooling core 123. The number of the elastic buckles 132 is eight, the eight elastic buckles 132 are arranged on the mounting ring 131 in a spaced manner, and two elastic buckles 132 are arranged on each side of the mounting ring 131 in a rectangular ring shape. But it is not limited thereto. In other embodiments, the second cooling core 123 can also be in a cylindrical shape, at this time, the mounting ring 131 is in a circular ring shape, and the number of the elastic buckles 132 can be four or six. The shape of the second cooling core 123 and the mounting ring 131 and the number of the elastic buckles 132 are not limited.

[0047] Further, the distance between the elastic support 130 and the gas receiving box 122 is less than or equal to half of the length of the second cooling core 123, that is, the elastic support 130 is arranged at the front half of the second cooling core 123 close to the first cooling core 121. At this time, since the elastic support 130 is arranged close to the first cooling core 121, it can effectively limit the deformation of the first cooling core 121, preventing the first cooling core 121 from deforming excessively. Meanwhile, the reasonable arrangement position of the elastic support 130 can ensure the supporting effect on the second cooling core 123, thereby improving the buffering effect on the cooling core 120 and ensuring safety.

[0048] The gas receiving box 122 comprises a first connecting disc 1221 and a second connecting disc 1222. The first connecting disc 1221 is connected with the first cooling core 121, and the second connecting disc 1222 is connected with the second cooling core 123. The first connecting disc 1221 and the second connecting disc 1222 are connected and jointly form a transition cavity 1223. That is, the first cooling core 121 is arranged at one side of the transition cavity 1223, and the second cooling core 123 is arranged at the other side of the transition cavity 1223. The exhaust gas in the first cooling core 121 flows into the second cooling core 123 through the transition cavity 1223. The transition cavity 1223 is used to realize the transition function of cooling the exhaust gas from primary cooling to secondary cooling.

[0049] The first cooling core 121 comprises a plurality of first cooling pipes 1211, which are spaced apart and connected to one side of the gas receiving box 122. The second cooling core 123 comprises a plurality of second cooling pipes 1231, which are spaced apart and connected to the other side of the gas receiving box 122. Specifically, the first cooling pipes 1211 and the second cooling pipes 1231 are both used for the exhaust gas to pass through. In the working process of the EGR cooler 100, the high-temperature exhaust gas input from the gas inlet chamber 140 enters the plurality of first cooling pipes 1211 at the same time, and the plurality of first cooling pipes 1211 jointly act to realize the primary cooling of the high-temperature exhaust gas. Then, the exhaust gas after primary cooling enters the plurality of second cooling pipes 1231 at the same time through the transition cavity 1223, and the plurality of second cooling pipes 1231 jointly act to realize the secondary cooling of the exhaust gas.

[0050] In the embodiment, the first cooling pipes 1211 are in a spiral shape, and the second cooling pipes 1231 are in a straight pipe shape, but are not limited thereto. In other embodiments, the first cooling pipes 1211 can be in a corrugated shape, a circular pipe shape or a dotted circular pipe shape, and the second cooling pipes 1231 can also be a circular pipe. The shape of the first cooling pipes 1211 and the second cooling pipes 1231 is not specifically limited.

[0051] The EGR cooler 100 provided by the embodiment of the utility model, the cooling core 120 is arranged in the internal cavity 113 of the shell 110, one end of the cooling core 120 is communicated with the air inlet chamber 140, the other end is communicated with the air outlet chamber 150, the air inlet chamber 140 and the air outlet chamber 150 are connected with the shell 110, the air inlet chamber 140 is used for inputting high-temperature exhaust gas into the cooling core 120, the elastic supporting piece 130 is connected between the cooling core 120 and the shell 110, and the elastic supporting piece 130 is used for elastically deforming when the cooling core 120 vibrates or is deformed by heat.Compared with the prior art, the EGR cooler 100 provided by the utility model can effectively support and buffer the deformation of the cooling core 120 by the elastic supporting piece 130 connected to the cooling core 120 and abutting against the shell 110, the cracking failure is avoided, the service life is long, and the safety is high.The engine system is stable, reliable, safe and durable.

[0052] Second embodiment

[0053] Please refer to Figure 4 The embodiment of the utility model provides a kind of EGR cooler 100, compared with the first embodiment, the difference of this embodiment is that the setting position of elastic supporting piece 130 is different.

[0054] In the embodiment, the elastic supporting piece 130 is connected with the air inlet box 122, and abuts against the shell 110, and the elastic supporting piece 130 can support and buffer the air inlet box 122 to limit the first cooling core 121, prevent the first cooling core 121 from excessive deformation, improve the shock resistance of the entire cooling core 120, avoid the cracking failure, prolong the service life, and improve safety.

[0055] Further, the mounting ring 131 is sleeved outside the air inlet box 122, the mounting ring 131 is used to fix the relative position of the elastic supporting piece 130 and the air inlet box 122, to prevent the elastic supporting piece 130 from displacing relative to the air inlet box 122, and the elastic buckle 132 abuts against the shell 110 to realize the support and buffer function of the air inlet box 122.Specifically, a plurality of elastic buckles 132 are arranged on the mounting ring 131 with intervals, and are collectively arranged outside the air inlet box 122, and the plurality of elastic buckles 132 jointly act to buffer the cooling core 120 from various directions.

[0056] The EGR cooler 100 provided by the embodiment of the utility model has the same beneficial effects as the first embodiment, which will not be repeated here.

[0057] Third embodiment

[0058] Please refer to Figure 5The embodiment of the utility model provides a kind of EGR cooler 100, compared with the first embodiment, the difference of the embodiment is that the setting mode of elastic support piece 130 is different.

[0059] In the embodiment, the first connecting disc 1221 is covered outside the second connecting disc 1222 and connected with the second connecting disc 1222. The elastic support piece 130 is annularly arranged and integrally formed outside the first connecting disc 1221, that is, the elastic support piece 130 and the first connecting disc 1221 are integrally formed, instead of being a separate component, and the support and buffering function of the docking gas box 122 is directly realized by the elastic support piece 130 located outside the first connecting disc 1221. Specifically, the annularly arranged elastic support piece 130 can buffer the cooling core 120 from all directions, avoid rigid contact between the cooling core 120 and the shell 110, and improve safety.

[0060] However, it is not limited to this, in other embodiments, the second connecting disc 1222 is covered outside the first connecting disc 1221 and connected with the first connecting disc 1221, the elastic support piece 130 is annularly arranged and integrally formed outside the second connecting disc 1222, that is, the elastic support piece 130 and the second connecting disc 1222 are integrally formed, instead of being a separate component, and the support and buffering function of the docking gas box 122 is directly realized by the elastic support piece 130 located outside the second connecting disc 1222.

[0061] The EGR cooler 100 provided by the embodiment of the utility model has the same beneficial effects as the first embodiment, which will not be repeated here.

[0062] Fourth embodiment

[0063] Please refer to Figure 6 and Figure 7 The embodiment of the utility model provides a kind of EGR cooler 100, compared with the first embodiment, the difference of the embodiment is that the setting mode of elastic support piece 130 is different.

[0064] In the embodiment, the first connecting disc 1221 is provided with a clamping groove 1224, the elastic support piece 130 is integrally formed with the second connecting disc 1222 and clamped with the clamping groove 1224, that is, the elastic support piece 130 and the second connecting disc 1222 are integrally formed, instead of being a separate component, and the elastic support piece 130 is in the form of a clamping hook, which can be clamped with the clamping groove 1224 on the first connecting disc 1221 to fix the relative position of the first connecting disc 1221 and the second connecting disc 1222, and on the other hand, it can realize the support and buffering function of the docking gas box 122, thereby buffering the thermal deformation of the cooling core 120.

[0065] Specifically, the number of the elastic supports 130 and the number of the clamping grooves 1224 are both plural, the plurality of clamping grooves 1224 are arranged on the first connecting disc 1221 at intervals, each elastic support 130 is clamped with one clamping groove 1224, so as to improve the fixing effect of the first connecting disc 1221 and the second connecting disc 1222, meanwhile, the plurality of elastic supports 130 jointly act, so as to realize the buffering of the cooling core 120 from various directions, avoid the rigid contact between the cooling core 120 and the shell 110, and improve the safety.

[0066] The beneficial effects of the EGR cooler 100 provided by the embodiment of the utility model are the same as those of the first embodiment, and will not be repeated here.

[0067] The preferred embodiments of the utility model are merely used for limiting the utility model, and the utility model can be changed and varied for those skilled in the art. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. An EGR cooler characterized by, The application relates to a cooling device, which comprises a shell, a cooling core, an elastic support, an air inlet chamber and an air outlet chamber, the cooling core is arranged in the internal cavity of the shell, one end of the cooling core is communicated with the air inlet chamber, the other end is communicated with the air outlet chamber, the air inlet chamber and the air outlet chamber are connected with the shell, the air inlet chamber is used for inputting high-temperature waste gas into the cooling core, the elastic support is connected between the cooling core and the shell, and the elastic support is used for elastically deforming when the cooling core vibrates or is deformed by heat.

2. The EGR cooler of claim 1, wherein, The cooling core comprises a first cooling core, an air connection box and a second cooling core, the first cooling core is connected with the second cooling core through the air connection box, the first cooling core is communicated with the air inlet chamber, the second cooling core is communicated with the air outlet chamber, the flexibility of the first cooling core is greater than that of the second cooling core, the elastic support is connected with the air connection box or the second cooling core, and is abutted against the shell.

3. The EGR cooler of claim 2, wherein, The elastic support comprises a mounting ring and a spring buckle, the spring buckle is connected with the mounting ring, the mounting ring is sleeved outside the air connection box or the second cooling core, and the spring buckle is abutted against the shell. Alternatively, the elastic support is in a honeycomb ring shape, the elastic support is sleeved outside the air connection box or the second cooling core, and is abutted against the shell.

4. The EGR cooler of claim 3, wherein, The number of the spring buckles is plural, the plural spring buckles are arranged on the mounting ring in a spaced mode, and jointly surround the air connection box or the second cooling core.

5. The EGR cooler of claim 2, wherein, The spacing between the elastic support and the air connection box is less than or equal to half of the length of the second cooling core.

6. The EGR cooler of claim 2, wherein, The air connection box comprises a first connecting disc and a second connecting disc, the first connecting disc is connected with the first cooling core, and the second connecting disc is connected with the second cooling core. The first connecting disc is sleeved outside the second connecting disc, the elastic support is arranged in a ring shape and is integrally formed outside the first connecting disc; or the second connecting disc is sleeved outside the first connecting disc, the elastic support is arranged in a ring shape and is integrally formed outside the second connecting disc.

7. The EGR cooler of claim 2, wherein, The air connection box comprises a first connecting disc and a second connecting disc, the first connecting disc is connected with the first cooling core, and the second connecting disc is connected with the second cooling core, the first connecting disc is provided with a clamping groove, the elastic support is integrally formed with the second connecting disc and is clamped with the clamping groove.

8. The EGR cooler of claim 2, wherein, The first cooling core comprises a plurality of first cooling pipes, the plural first cooling pipes are distributed in a spaced mode and are connected to one side of the air connection box. The second cooling core comprises a plurality of second cooling pipes, the plural second cooling pipes are distributed in a spaced mode and are connected to the other side of the air connection box. The first cooling pipe is in a thread shape, a corrugated shape, a circular tube shape or a dotted circular tube shape, and the second cooling pipe is in a straight pipe shape. The air connection box comprises a first connecting disc and a second connecting disc, the first connecting disc is connected with the second connecting disc and jointly surrounds a transition cavity.

9. The EGR cooler of any of claims 1-8, wherein, The housing is provided with an inlet and an outlet at intervals along the extension direction thereof, the inlet is arranged close to the air inlet chamber, the outlet is arranged close to the air outlet chamber, the inlet is used for the cooling medium to enter, and the outlet is used for the cooling medium to exit.

10. An engine system characterized by, An EGR cooler comprising any one of claims 1 to 9.

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