• 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:

    公开号:SE1050342A1
    申请号:SE1050342
    申请日:2010-04-08
    公开日:2011-10-09
    发明作者:Gustaf Von Eckermann；Brice Joly
    申请人:Titanx Engine Cooling Holding Ab；
    IPC主号:
    专利说明:

    2 of the heat exchanger, which effectively prevents the refrigerant from being switched past the heat exchanger.
    There is a need for an improved heat exchanger, which is suitable for use as an oil cooler in e.g. heavy vehicles.
    Summary An object of the present description is to provide a heat exchanger which is suitable for use as an oil cooler in heavy vehicles. A special purpose is to provide a more efficient heat exchanger.
    A further object is to provide a heat exchanger which is robust and easy to install.
    The invention is defined by the appended independent claims.
    Embodiments appear from the dependent claims, from the following description and from the drawings.
    According to a first aspect, a heat exchanger for an oil cooler is provided, comprising: at least two heat exchanger elements, including a first duct; wherein a second channel is formed between the two heat exchanger elements. An edge portion of a first of the heat exchanger elements has a leakage flow limiter which extends towards an edge portion of a second of the heat exchanger elements, and the leakage flow limiter forms an outer wall of the heat exchanger.
    The leakage flow limiter will at least partially close the second channel, thereby preventing or reducing leakage flows.
    The leakage flow limiter can also form an outer, or outward-facing wall of the heat exchanger.
    The leakage flow limiter will control or eliminate the flow at the edge of the heat exchanger elements. By preventing or reducing leakage flows, the heat dissipation of the heat exchanger is improved.
    The edge portion may be an edge portion extending substantially parallel to a major flow direction in the second channel, such as, for example, a longitudinal edge portion.
    The heat exchanger plates can be joined together along their entire periphery and thus in practice close the first channel. 10 15 20 25 30 3 The leakage flow limiter can be in contact with the edge portion of the other of the heat exchanger elements.
    The leakage flow limiter can thus completely prevent leakage flows.
    The leakage flow limiter can be joined to the edge portion of the second of the heat exchanger elements.
    Such joining can be achieved by welding or brazing, and consequently also form a connection between the heat exchanger elements. This eliminates the need for a separate bolt to hold the units together.
    The leakage flow limiter can be provided by the edge portion of the heat exchanger element being folded to form a flange.
    For example, the flange can be formed by folding one or both of the heat exchanger plates forming the heat exchanger element.
    Alternatively, the leakage flow restrictor may be formed by a ridge in the immediate vicinity of the edge of one or both of the heat exchanger plates forming the heat exchanger elements. The ridge can be formed on the edge of the plate, or it can be placed slightly at a distance from the edge. Usually the ridge extends parallel to the edge of the heat exchanger element. The distance from the edge can be in the order of 1-5 mm, preferably 1-2 mm. At least one of the heat exchanger elements may be formed by a pair of joined heat exchanger plates.
    As an alternative, at least one of the heat exchanger elements may be formed by a substantially tubular body. At least one of an inlet and an outlet of the second duct is open to a cavity in which the heat exchanger is to be placed.
    Consequently, the refrigerant is introduced into the cavity, and then caused to flow through the heat exchanger package. According to a second aspect, an oil cooling system is provided, comprising a cavity with a liquid coolant inlet and a liquid coolant outlet; an oil inlet for oil to be cooled and an oil outlet for cooled oil; a heat exchanger, as described above, said heat exchanger being substantially enclosed in said cavity. The outer wall of the heat exchanger may be located at a distance from a corresponding wall of the cavity.
    A flow restrictor can be provided to prevent the coolant from flowing outside the outer wall of the heat exchanger.
    According to a third aspect, a method of cooling oil in a vehicle is provided by means of an oil cooling system as described above, which method comprises causing oil to be cooled to flow from the oil inlet through the first channel to the oil outlet, and causing liquid cooling medium to flow from the refrigerant inlet through the second channel to the refrigerant outlet.
    According to the method, a portion of the liquid refrigerant can be caused to flow outside the outer wall of the heat exchanger.
    According to the method, a part of the liquid coolant can be caused to flow between the leakage flow limiter and the edge portion of the other of the heat exchanger elements.
    According to the method, a part of the liquid coolant can be prevented at least partially, preferably completely, from flowing between the leakage flow limiter and the edge portion of the other of the heat exchanger elements.
    Alternatively, the liquid refrigerant can be prevented from flowing outside the outer wall of the heat exchanger.
    Brief Description of the Drawings Fig. 1 is a schematic perspective view of a heat exchanger stack according to a first embodiment of the present description.
    Figs. 1a and 1b are schematic sectional views of the heat exchanger stack of Fig. 1 taken along lines 1a-1a and 1b-1b, respectively.
    Fig. 1c is a schematic perspective view of a heat exchanger plate forming part of the heat exchanger stack according to Fig. 1.
    Fig. 1d is a schematic sectional view of a second embodiment of the leakage flow limiter.
    Fig. 1e is a schematic sectional view of a further embodiment of the leakage flow limiter. Fig. 2 is a schematic perspective view of a heat exchanger stack according to a second embodiment of the present description.
    Figs. 2a and 2b are schematic sectional views of the heat exchanger stack of Fig. 2 taken along lines 2a-2a and 2b-2b, respectively.
    Fig. 3 is a schematic perspective view of a heat exchanger plate according to another embodiment of the present description.
    Fig. 4 is a schematic perspective view of a heat exchanger stack according to yet another embodiment of the present description.
    Fig. 5 is a schematic sectional view of an oil cooling system in which a heat exchanger stack according to any of the embodiments described herein may be used.
    Fig. 6 is a schematic sectional view of an alternative embodiment of an oil cooling system.
    Fig. 7 is a schematic sectional view of a part of a heat exchanger according to another construction.
    Description of embodiments Fig. 1 illustrates a stacked plate heat exchanger 1 formed by three joined heat exchanger elements 10. The heat exchanger has first and second ports 3, 4, which are usually used for the medium to be cooled, and first and second openings 5, 6, which are usually used for the refrigerant. It will be appreciated that the ports 3, 4 may be used for the coolant and the openings 5, 6 may be used by the medium to be cooled.
    The heat exchanger 1 has an outer wall 2, which is formed by flanges 11 of the heat exchanger elements 10. The flanges form leakage flow limiters.
    In the embodiment illustrated in fig. 1, the flange is not in contact with the adjacent heat exchanger element. Therefore, a leakage flow FCB will be reduced, but not completely prevented. In case it is desired to completely prevent leakage flow FCB, the vanes can be designed to be in contact with the adjacent heat exchanger element (Figures 1d, 1e), possibly along the entire length of the flange 11. It is also possible to join the heat exchanger elements together by attaching the flange to the adjacent heat exchanger element, e.g. by soldering or welding. As an alternative, glue can be used to achieve joining. A sealant can be used to provide a seal between the flange and the adjacent heat exchanger element.
    Referring to Figures 1a and 1b, the ports 3, 4 are connected to a first channel 12, which is formed inside each heat exchanger element 10. Each heat exchanger element 10 is formed by a pair of heat exchanger plates 17, 18, which are joined at their peripheries and at the ports 3. , 4.
    An edge portion of each heat exchanger element is folded to provide the flange 11. In the embodiment illustrated in Figs. 1a and 1b, the flange is formed by a fold provided on one of the plates 18, while the edge portion of the second plate 17 is folded in the opposite direction, towards the plate. 18.
    Fig. 1c schematically illustrates a heat exchanger plate 18 formed for a flow of coolant which is substantially parallel to the long sides of the heat exchanger plate, and which is thus completely open at its short sides.
    Referring to Fig. 1d, the leakage flow limiter, here in the form of a flange 11, can be extended all the way to the adjacent heat exchanger element, thereby completely preventing leakage flow.
    As illustrated in Fig. 1d, both plates 17, 18 can be folded in the same direction, so that both form part of the flange 11.
    As mentioned above, as an alternative, and illustrated in Fig. 1e, the edges of the plates can be folded in different directions, with one of them extending beyond the other and all the way to the adjacent heat exchanger element, thus completely preventing leakage flow.
    Fig. 2 schematically illustrates an embodiment of a heat exchanger 1 'formed by a plurality of heat exchanger elements 10', the leakage flow limiter 11 'being formed as a ridge extending along the peripheral edge of a portion of the heat exchanger element 10'.
    Figures 2a and 2b schematically illustrate the appearance of each heat exchanger element 10 'according to this embodiment. As can be seen on the right-hand portion of Fig. 2a, each plate 17 ', 18' is formed with a ridge along its edge, which forms the leakage flow limiter 11 '. When the units 10 'are joined, the leakage flow restrictors 11' form an outer wall 2 'of the heat exchanger. This outer wall can, given that the ridges of adjacent heat exchanger elements 10 'come into contact with each other, in practice prevent leakage flow FCB. Although not shown, the leakage flow limiters 11 'can be arranged along both long sides, and if desired, also along a portion of the short sides.
    It is also possible to join the heat exchanger elements 10 'to each other by attaching the ridge 11' to the ridge 11 'of the adjacent heat exchanger element 10', e.g. by soldering or welding. Glue can also be used to achieve such an attachment. It is possible to seal the space between the ridges with a sealing substance.
    Referring to Fig. 3, an embodiment is illustrated in which the openings 5, 6 are smaller than the width of the heat exchanger, and where both openings 5, 6 are arranged on the same side of a longitudinal center line C of the heat exchanger plate 18 ". Most of the short sides are covered by an 11 ”flange.
    Referring to Fig. 4, an embodiment is illustrated in which the openings 5, 6 are smaller than the width of the heat exchanger, and where both openings 5, 6 are arranged on different sides of the longitudinal center line C of the heat exchanger plate 18 "". Most of the short sides are covered by a flange 11 "".
    Plates 17, 18; 17 ', 18'; 17 ", 18" forming the heat exchanger elements can be joined by soldering or welding, which is conventional.
    Furthermore, the heat exchanger elements 10, 10 ', 10 "can be joined together by soldering or welding around the ports 3, 4 and possibly also peripherally by soldering or welding the flange 11, 11', 11" of a heat exchanger element to the periphery of adjacent heat exchanger elements.
    Referring to Fig. 5, there is shown a heat exchanger system comprising a heat exchanger 10, 10 ', which is arranged in a cavity 8. Inlet for liquid refrigerant 60 and outlet for liquid refrigerant 50 are connected to the cavity, so that the refrigerant is allowed to flow into the inlet 5. of the heat exchanger 10, 10 'and flow out at the outlet 6 of the heat exchanger 10, 10', and thus flow through the channel 7 in the direction indicated by the arrow Fc.
    The oil to be cooled can flow into port 4 and flow out of port 3 through the channel 12, and thus flow in the direction indicated by Fo. It is noted that the currents Fo and Fc can be arranged in the same or opposite direction. Referring to Fig. 6, a heat exchanger system is shown, similar to that shown in Fig. 5, but in which the flow restrictors 70 are located around the heat exchanger 10, 10 ', thereby completely preventing coolant from flowing around the heat exchanger. Such flow restrictors can be combined with leakage flow restrictors 11, 11 'which extend at least from a position downstream of the flow restrictors 70. The flow restrictors 70 can be arranged in the form of sealing strips or sealant arranged to seal the space between the heat exchanger space 10, the heat exchanger space 10, 10'.
    Fig. 7 shows a heat exchanger formed by a plurality of heat exchanger elements 10 '"a, 10'" b, each of which is formed as a substantially tubular element having a flange extending along its longitudinal direction. Each element can be formed by rolling or folding a sheet or by extrusion In any case, the formation of the tubular member may be followed by a flattening step and / or the insertion of an additional flange structure to increase heat transfer.
    The heat exchanger can be formed, as illustrated, by a plurality of identical heat exchanger elements, which are arranged so that their respective flange forms all or part of an outer wall. The heat exchanger elements are arranged so that the flange of every other heat exchanger element forms a part of the right outer wall and flanges of the remaining heat exchanger elements form a respective part of the left outer wall.
    The length of the flange can vary according to different embodiments. In the illustrated embodiment, each flange has a length corresponding to the distance to the heat exchanger element which is beyond the nearest. But longer flanges are conceivable, for example a length corresponding to the heat exchanger element which is n steps away, where n is an even number.
    In yet another alternative, the heat exchanger elements forming the outermost heat exchanger elements may have a respective flange, each forming a respective outer wall, while the remaining heat exchanger elements have no flange at all, but are surrounded by the flanges of the two outermost heat exchanger elements.
    权利要求:
    Claims (1)
    [1]
    A heat exchanger (1, 1 ') for an oil cooler, comprising: at least two heat exchanger elements (10, 10'), each enclosing a first channel (12); a second channel (7) being formed between the two heat exchanger elements (10,10 '); characterized in that an edge portion of a first of the heat exchanger elements (10, 10 ') has a leakage flow restrictor (11, 11', 11 ", 11 '") which extends towards an edge portion of a second of the heat exchanger elements (10, 10'), and the leakage flow restrictor (11, 11 ', 11 ", 11'") forms an outer wall (2, 2 ') of the heat exchanger (1, 1'). The heat exchanger according to claim 1, wherein the leakage flow restrictor (11, 11 ', 11 ", 11 "') is in contact with the edge portion of the second of the heat exchanger elements (10, 10'). Heat exchanger according to claim 1 or 2, wherein the leakage flow limiter (11, 11 ', 11", 11' ") is joined to the edge portion of the second of the heat exchanger elements. . Heat exchanger according to any one of the preceding claims, wherein the leakage flow limiter (11, 11 ', 11 ", 11"') is provided by folding the edge portion of the heat exchanger element. . Heat exchanger according to claim 4, wherein the leakage flow limiter (11, 11 ', 11 ", 11'") is formed by folding one or both of the heat exchanger plates forming the heat exchanger element. Heat exchanger according to any one of claims 1-3, wherein the leakage flow limiter (11, 11 ', 11 ", 11'") is formed by a ridge in the immediate vicinity of the edge of one or both of the heat exchanger elements. Heat exchanger according to any one of the preceding claims, wherein at least one of the heat exchanger elements is formed by a pair of joined heat exchanger plates (17, 18; 17 ', 18'; 18 "; 18 '"). Heat exchanger according to any one of claims 1-6, wherein at least one of the heat exchanger elements is formed by a substantially tubular body. Heat exchanger according to one of the preceding claims, wherein at least one of an inlet (6) and an outlet (5) of the second duct is open towards a cavity (8), in which the heat exchanger (10, 10 ') is to be placed. A cooling system, comprising: 11 a cavity (8) having a liquid refrigerant inlet (60) and a liquid refrigerant outlet (50); an oil inlet (4) for oil to be cooled and an oil outlet (3) for cooled oil; a heat exchanger (10, 10 '), according to any one of the preceding claims, wherein said heat exchanger is substantially enclosed in said cavity (8). Oil cooling system according to claim 10, wherein the outer wall (2, 2 ') of the heat exchanger is located at a distance from a corresponding wall of the cavity (8). A cooling system according to claim 10 or 11, wherein a flow restrictor (70) is arranged to prevent the coolant from flowing outside the outer wall (2, 2 ') of the heat exchanger. A method of cooling oil in a vehicle by means of an oil cooling system according to any one of claims 10-12, which method comprises: causing oil to be cooled to flow from the oil inlet (4) through the first channel (12) to the oil outlet (3), and causing liquid refrigerant to flow from the refrigerant inlet (60) through the second channel (7) to the refrigerant outlet (50). A method according to claim 13, wherein a portion of the liquid refrigerant flows outside the outer wall (2, 2 ') of the heat exchanger. A method according to claim 13 or 14, wherein a part of the liquid coolant is caused to flow between the leakage flow limiter (11, 11 ', 11 ", 11'") and the edge portion of the other of the heat exchanger elements. A method according to claim 13, wherein the liquid refrigerant at least partially, preferably completely, is prevented from flowing between the leakage flow limiter (11, 11 ', 11 ", 11'") and the edge portion of the second of the heat exchanger elements. The method of claim 16, wherein the liquid refrigerant is prevented from flow outside the outer wall (2, 2 ') of the heat exchanger.
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    法律状态:
    优先权:
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    JP2016151752A| JP6391123B2|2010-04-08|2016-08-02|HEAT EXCHANGER, OIL COOLING SYSTEM, AND OIL Cooling Method|
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