• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Heat exchanger for gases, especially the exhaust gases of an engine. It comprises a bundle of tubes (2) or plates disposed inside a housing (3), said housing defining a cooling fluid inlet and outlet, said exhaust gases being intended to circulate inside said tubes (2) or between said plates, including the interior of each of said tubes (2) or plates a means (8) disturbing the flow of gases to facilitate the exchange of heat with a cooling fluid, characterized in that said disturbing means comprise the minus two sets (8a, 8b, 8c, 3d) of disturbing elements (8) arranged one above the other inside each of said tubes (2) or between said plates, defining each of said sets (8a, 8b, 8c, 8d) of disturbing elements (8) an independent subset of paths (11a, 11b, 12a, 12b) of passage of the gas flow. (Machine-translation by Google Translate, not legally binding)
    公开号:ES2594361A1
    申请号:ES201530833
    申请日:2015-06-15
    公开日:2016-12-19
    发明作者:Yolanda BRAVO RODRÍGUEZ；Rosa PUÉRTOLAS REBOLLAR；Fernando PUÉRTOLAS SÁNCHEZ；Raúl ROMERO
    申请人:Valeo Termico SA；
    IPC主号:
    专利说明:

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    DESCRIPTION
    HEAT EXCHANGER FOR GASES, ESPECIALLY OF GASES
    ESCAPE OF AN ENGINE
    The present invention relates to a heat exchanger for gases, especially the exhaust gases of an engine. The invention is especially applied in one-engine exhaust gas recirculation exchangers (EGRC).
    Background of the invention
    The main function of the EGR exchangers is the exchange of heat between the exhaust gases and the cooling fluid, in order to cool the gases.
    Currently, EGR heat exchangers are widely used for diesel applications to reduce emissions, and are also used in gasoline applications to reduce fuel consumption.
    The market tends to reduce the size of engines, and the application of EGR heat exchangers not only in high pressure (HP) applications but also in low pressure (LP) applications. Vehicle manufacturers demand EGR heat exchangers with higher yields and, at the same time, the space available to place the exchanger and its components is getting smaller and harder to integrate.
    Additionally, in many applications the flow of refrigerant fluid available to cool the exhaust gases tends to be lower even though the exchanger yields have been increasing.
    The current configuration of the EGR exchangers on the market corresponds to a metal heat exchanger generally made of stainless steel or aluminum. Basically, there are two types of EGR heat exchangers: a first type consists of a housing in whose interior there is a parallel tube beam for the passage of gases, the refrigerant circulating through the housing, externally to the tubes, and the second The type consists of a series of parallel plates that constitute the heat exchange surfaces, so that the exhaust gases and the refrigerant circulate between two plates, in alternating layers, and may include fins to improve heat exchange.
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    In the case of tube beam heat exchangers, the connection between the tubes and the housing can be of different types. Generally, the tubes are fixed at their ends between two support plates coupled at each end of the housing, both support plates having a plurality of holes for the placement of the respective tubes.
    Said support plates are in turn fixed to connection means with the recirculation line, which may consist of a V-connection or a peripheral connection flange or flange, depending on the design of the recirculation line where it is assembled. the exchanger Said flange may be assembled together with a gas tank, so that the gas tank is an intermediate piece between the housing and the flange, or the flange may be assembled directly to the housing. This last design frequently corresponds to cases where the exchanger is directly connected to an EGR valve, which has the function of controlling the passage of exhaust gases through it.
    In some applications of EGR circuits, it is necessary to cool the EGR valve. In this case, the most usual design includes a by-pass conduit that conducts the cooling fluid, which circulates through the EGR exchanger, to the EGR valve. Because the EGR exchanger is assembled to the EGR circuit through a peripheral flange or flange, the bypass pass of the cooling fluid must be manufactured through said flange.
    In both types of EGR exchangers, most of its components are metallic, so that they are assembled by mechanical means and then welded in an oven or welded by arc or laser to ensure adequate sealing required for this application.
    EGR exchangers of tubes of substantially rectangular cross-section are known, using fins arranged inside said tubes to improve heat transfer through these secondary surfaces, whereby the total heat exchange surface is increased.
    There are different types of fins for tubes, such as the fin known as "offset end" which has a configuration of substantially rectangular profile repetitive in the transverse direction, and interconnected zigzag paths according to the longitudinal direction, or for example the fin known as "wavy end" with channels that define wavy or sinusoidal paths.
    A main objective of the EGR heat exchangers is to achieve an appropriate gas flow distribution within the gas passage channels, in this case within the tubes or plates, so that a uniform heat flow is guaranteed throughout the exchanger and take advantage of the entire available exchange area. Therefore, the shape of the gas tank or other elements that can be assembled to the EGR heat exchanger in the path of the gases, especially in the inlet area, is important. The design of these components is essential within the overall design of the exchanger. However, there are external limitations that make optimization of this design difficult, since the shape and volume of these components are determined by the environment where the EGR exchanger is located.
    The compaction of the design of the fins inside the tubes or plates would allow to obtain exchangers of shorter length and, consequently, would allow to gain a space that would positively result in the optimization of the design of assembly elements such as the gas tank. However, the manufacturing processes of the disruptors have a limitation in feasibility linked to the combination of exchange surface density and fin height.
    Description of the invention
    The objective of the gas heat exchanger, especially the exhaust gases of an engine of the present invention, is to solve the inconveniences of the 20 exchangers known in the art, providing a compact and reduced length exchanger with an optimum transfer of heat at the gas flow inlet.
    The heat exchanger for gases, especially the exhaust gases of an engine, object of the present invention, is of the type comprising a bundle of tubes or plates arranged inside a housing, said housing defining an inlet and outlet of refrigerant fluid 25 said gases being intended to circulate inside said tubes or between said plates, including inside each of said tubes or plates disturbing means of the gas flow to facilitate heat exchange with the cooling fluid, and is characterized by the fact that the disturbing means includes at least two sets of disturbing elements arranged one above the other inside each of said tubes 30 or between said plates, each of said assemblies defining an independent subset of trajectories of passage of the gas flow inside said tubes or plates.
    The inclusion of two sets of disturbing elements arranged one above the other inside the tubes or between said plates allows to improve the compactness of the surface of
    exchange and reduce the length of the exchanger, gaining space for the optimal design
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    of the assembly elements, such as the gas tank or connection flanges, improving the efficiency of existing exchangers.
    According to a preferred embodiment, each set of disturbing elements comprises a plurality of fins for heat exchange, the plurality of fins of each set defining an independent subset of paths for the passage of the flow of gases into said tubes or between said plates. Advantageously, these fins are obtained from a sheet of metal.
    According to this embodiment, the internal height of the tubes or plates of the exchanger is designed so that it is possible to introduce at least two sets of fins arranged stacked on top of each other. Each of these sets defines an independent subset of trajectories for the passage of gas flow.
    Advantageously, the fins of both sets have a substantially rectangular profile configuration in the transverse direction.
    According to one embodiment, the fins of both sets have an "offset end" type configuration that defines zigzag paths for the passage of the gas flow according to the longitudinal direction, said paths being intercommunicated according to said same longitudinal direction.
    The use of two independent sets of intercom fins allows a very compact and short length exchanger to be obtained.
    According to another embodiment, the fins of both sets have a "wavy end" type configuration that defines sinusoidal paths according to the longitudinal direction for the passage of the gas flow.
    The use of two independent sets of sinusoidal fins makes it possible to obtain a compact exchanger that is particularly useful for preventing the loss of gas pressure.
    Preferably, the two sets of disturbing elements are joined together by welding or by mechanical means, in order to ensure a correct heat transfer.
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    Optionally, said sets of disturbing elements are arranged one above the other so that one end of one of the assemblies is positioned along the longitudinal direction in an advanced or delayed position with respect to the position of the end of the other assembly located in a lower position.
    Brief description of the figures
    For a better understanding of what has been exposed, some drawings are attached in which, schematically and only by way of non-limiting example, two practical cases of realization of a heat exchanger of the present invention are represented, in which:
    Figure 1 is a perspective view showing the outer shell of a parallel tube heat exchanger and some of its assembly or connection elements.
    Figure 2 is a perspective view of two independent sets of disturbing elements configured as fin "offset" fins.
    Figure 3 is a cross section of a gas passage tube of the heat exchanger of Figure 1 with the assemblies of disturbing elements of Figure 2.
    Figure 4 is a longitudinal section of a gas passage tube of the heat exchanger of Figure 1 containing inside the assemblies of disturbing elements of Figure 2.
    Figure 5 is a perspective view of two sets of disturbing elements configured as fins of the "wavy fin" type.
    Figure 6 is a cross section of a gas passage tube of a heat exchanger similar to that of Figure 1 which contains inside the assemblies of disturbing elements of Figure 5.
    Figure 7 is a longitudinal section of a gas passage tube of an exchanger containing inside it the assemblies of disturbing elements of Figure 5.
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    Description of preferred embodiments
    According to the embodiments of the invention shown in Figures 1 to 7, the heat exchanger 1 for gases, especially the exhaust gases of an engine, comprises a bundle of tubes 2 arranged inside a housing 3 defining said tubes 2 a gas inlet and outlet. These tubes 2 are intended for the circulation of gases for the exchange of heat with a cooling fluid. At one end of the exchanger there is a gas tank 6 and a flange 7 connecting to the gas recirculation line.
    Figures 2 to 4 correspond to a first embodiment of the exchanger 1 that includes two sets 8a, 8b of disturbing elements configured as fins 8 arranged stacked one above the other inside the gas passage tubes 2. In this first embodiment, the section of each tube 2 is substantially rectangular and the fins 8 are obtained from a sheet of metal forming a configuration of disturbing elements of substantially rectangular profile defining interconnected zigzag paths 10a, 10b according to the longitudinal direction for the passage of the gas flow.
    As can be seen in Figures 2 and 3, the two sets 8a, 8b of disturbing elements, in this case fins 8, are arranged joined and stacked on top of each other so that they define two independent subsets 10a, 10b of paths for the Gas flow step. The joining of the two sets of fins 8 can be carried out by welding or by mechanical means.
    Figures 5 to 7 correspond to a second embodiment of the exchanger 1 which also includes two sets 8c, 8d of disturbing elements configured as fins 8 arranged stacked one on top of the other inside a tube 2 which, in this case, defines two inner chambers 2a, 2b for the passage of gas flow.
    In this second embodiment of Figures 5 to 7, the fins 8 of both sets 8c, 8d have a configuration that defines sinusoidal paths 11a, 11b according to the longitudinal direction for the passage of the gas flow (see Figure 5). As in the previous embodiment, the two sets 8c, 8d of disturbing elements are stacked on top of each other so that they define two independent subsets 11a, 11b of paths for the passage of gas flow into each tube 2 of the exchanger .
    In accordance with the present invention, the interior height of the gas passage tubes 2 of the exchanger 1 is designed so that it is possible to introduce at least two sets 8a, 8b or 8c, 8d of fins 8, arranged stacked one over another. Thanks to this, it is possible to obtain a compact design exchanger like the one shown in figure 1. This exchanger 1 has a very high efficiency and reduced pipe length 2, which allows to gain space for the optimal design and ease of assembly of the assembly elements, for example, the gas tank 6 or the flange 7 connected to the gas recirculation line.
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    In the two embodiments described, the two sets of fins 8a, 8b and 8c, 8d are arranged one above the other so that one end of one of the sets of fins 8a, 8c is located in an advanced or delayed position according to the longitudinal direction with respect to the position of the end 8b, 8d of the other set of fins 8 located in a lower position 15 (see figures 2, 3, 5 and 7).
    Although reference has been made to a specific embodiment of the invention, it is apparent to one skilled in the art that the described exchanger is susceptible to numerous variations and modifications, and that all the mentioned details can be replaced by technically equivalent ones. , without departing from the scope of protection defined by the appended claims. For example, although embodiments of disturbing elements configured as fins 8 types "offset end" or "wavy fin" have been shown in the figures, the same invention could be implemented with disturbing elements of a different configuration arranged one above the other inside of tubes or plates.
    权利要求:
    Claims (8)
    [1]
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    1. Heat exchanger (1) for gases, especially the exhaust gases of an engine, comprising a bundle of tubes (2) or plates arranged inside a housing (3), said housing defining (3) an inlet and outlet of a cooling fluid, said exhaust gases intended to circulate inside said tubes (2) or between said plates, including inside each of said tubes (2) or plates means (8) gas flow disruptors to facilitate the exchange of heat with the cooling fluid, characterized in that said disturbing means comprise at least two sets (8a, 8b, 8c, 8d) of disturbing elements (8) arranged one above the other in the interior of each of said tubes (2) or between said plates, each of said assemblies (8a, 8b, 8c, 8d) of disturbing elements (8) defining an independent subset of paths (11a, 11b, 12a, 12b ) of passage of the flow of gases inside said tubes (2) or plates.
    [2]
    2. Heat exchanger (1) according to claim 1, wherein each set (8a, 8b, 8c, 8d) of disturbing elements comprises a plurality of fins (8) for heat exchange, defining the plurality of fins ( 8) of each set (8a, 8b, 8c, 8d) an independent subset of trajectories (10a, 10b, 11a, 11b) for the passage of the flow of gases inside said tubes (2) or plates.
    [3]
    3. Heat exchanger (1) according to claim 2, wherein the fins (8) of both assemblies (8a, 8b, 8c, 8d) have a substantially rectangular profile configuration in the transverse direction.
    [4]
    4. Heat exchanger (1) according to claim 3, wherein the fins (8) of both sets (8a, 8b) have a configuration defining paths (11a, 11b) in zig-zag according to the longitudinal direction for the passage of the gas flow, said paths being intercommunicated (10a, 10b) according to said longitudinal direction.
    [5]
    5. Heat exchanger (1) according to claim 3, wherein the fins (8) of both sets (8c, 8d) have a configuration that defines sinusoidal paths (11a, 11b) according to the longitudinal direction for the flow passage of gases
    [6]
    6. Heat exchanged (1) according to any of the preceding claims, wherein said disturbing elements or fins (8) are obtained from a sheet of metal.
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    [7]
    7. Heat exchanger (1) according to any one of the preceding claims, wherein said two sets (8a, 8b, 8c, 8d) of disturbing elements (8) are joined one upon another by welding or by mechanical means.
    [8]
    8. Heat exchanger (1) according to any of the preceding claims, wherein said two sets (8a, 8b, 8c, 8d) of disturbing elements (8) are arranged one above the other so that one end of one of the assemblies is located in an advanced or delayed position according to the longitudinal direction with respect to the position of the end of the other assembly located in a lower position.
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    同族专利:
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE1882037U|1963-08-29|1963-11-07|Friedrich Dr Ing Hermann|TUBULAR BODY FOR HEAT EXCHANGER.|
    ES342901A1|1966-07-15|1968-08-16|Chausson Usines Sa|Improvements in or relating to Heat Exchangers|
    DE102006033570A1|2006-07-20|2008-01-24|Modine Manufacturing Co., Racine|Shallow heat exchange tube, has inner insert designed and arranged for spiral flow of medium in tube |
    JP2009299968A|2008-06-12|2009-12-24|T Rad Co Ltd|Heat exchanger|
    WO2013080611A1|2011-12-02|2013-06-06|古河スカイ株式会社|Heat exchanger and method for manufacturing same|
    JP5244845B2|2010-03-31|2013-07-24|株式会社ユタカ技研|Heat exchanger|CN108759524B|2018-06-08|2020-01-17|陕西益信伟创智能科技有限公司|Bionic curve rib row type micro staggered alveolus heat exchanger core and heat exchanger|
    ES2737123A1|2018-07-03|2020-01-10|Valeo Termico Sa|HEAT EXCHANGER FOR GASES, ESPECIALLY FOR EXHAUST GASES OF AN ENGINE, AND DANGER BODY FOR SUCH EXCHANGER |
    法律状态:
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    优先权:
    申请号 | 申请日 | 专利标题
    ES201530833A|ES2594361B1|2015-06-15|2015-06-15|HEAT EXCHANGER FOR GASES, ESPECIALLY OF EXHAUST GASES OF AN ENGINE|ES201530833A| ES2594361B1|2015-06-15|2015-06-15|HEAT EXCHANGER FOR GASES, ESPECIALLY OF EXHAUST GASES OF AN ENGINE|
    PCT/EP2016/063702| WO2016202832A1|2015-06-15|2016-06-15|Heat exchanger for gas, particularly for the exhaust gases of an engine|
    EP16731830.2A| EP3308094A1|2015-06-15|2016-06-15|Heat exchanger for gas, particularly for the exhaust gases of an engine|
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