• 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 and method for carrying out a quality test of a heat exchanger. The exchanger includes a part (M) comprising a projection (P), which is an integral part of the part (M) and which is deformable in a controlled manner under a force (F) 5 exerted thereon, constituting an indicator for a deformation resistance test. The method includes: a) exert a controlled force (F) on the projection (P) to deform it; and b) obtain a quality measure with respect to a deformation resistance for the part (M), as a function of the deformation caused to the projection (P) in stage a).
    公开号:ES2681122A1
    申请号:ES201730324
    申请日:2017-03-10
    公开日:2018-09-11
    发明作者:Iñigo TOLOSA ECHARRI；Carmen LARROSA LACUEY；José Antonio DE LA FUENTE ROMERO；Roberto FERNÁNDEZ MARTÍNEZ
    申请人:Valeo Termico SA；
    IPC主号:
    专利说明:

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    HEAT EXCHANGER AND METHOD FOR PERFORMING A QUALITY TEST OF A HEAT EXCHANGER
    Technical sector
    The present invention generally concerns, in a first aspect, a heat exchanger, and more particularly a heat exchanger that includes a projection in a part thereof, whose purpose is to act as an indicator for a test or test of deformation resistance.
    The invention applies to any type of heat exchanger, although it is especially applicable in oil-cooled or automatic transmission fluid coolers or ATF heat exchangers ("Automatic Transmission Fluid").
    Prior art
    In the state of the art, heat exchangers are known which comprise a first fluid circuit for the circulation of a fluid to be cooled and a second fluid circuit for the circulation of a cooling fluid, in which the first and second fluid circuits they are fluidly isolated from each other and arranged for a heat exchange between the fluid to be cooled and the cooling fluid.
    One of the most common configurations for oil and ATF heat exchangers is based on stacked plate technology, in general aluminum.
    This type of exchangers basically consists of a core where there is a heat exchange between the oil or the ATF and the cooling fluid. The core is constructed from plates stacked and welded together (generally by strong welding) that make up the circuits for both fluids.
    The core is in turn welded (in general by brazing) to a base plate that provides fixing points and that may include some input and output for any of the two circuits.
    The elasticity limit of the motherboard is a key factor for the robustness of the exchanger. Some aluminum alloys (2000, 6000, 7000 series) called "heat treatable" alloys to distinguish them from those alloys in which no significant reinforcement can be obtained by heat treatment. The terms "precipitation hardening"
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    or "structural hardening", are commonly used to name the heat treatment operation in which the strength and hardness of the alloys are increased.
    The precipitation hardening stages are as follows:
    - Heat treatment of the solution to obtain the dissolution of the soluble phase.
    - Cooling: to obtain supersaturation
    - Aging by aging: precipitation of soluble atoms at room temperature (natural aging) or at elevated temperature (artificial aging).
    The level of strengthening finally achieved is the consequence of the parameters chosen in the three stages of treatment.
    In the particular case of oil or ATF heat exchangers, when the proper hardening level is not reached, the pressure of the oil or ATF causes plastic deformation on the base plate (related to the low elastic limit or resistance to deformation of the alloy). Under these conditions, the following two types of major failures occur:
    - Loss of compression rate of the joints that causes liquid leakage.
    - Cracks in the contour of the junction between the exchanger core and the base plate that causes fluid leaks.
    In order to control the level of hardening and to detect parts with a low elasticity limit, the following methods can be used:
    - Control of process parameters that affect precipitation hardening.
    - Measurement of surface hardening as an indirect approximation of the elasticity limit.
    - Destructive test of some pieces, that is to say, to perform destructive tests of a certain percentage of each batch of manufactured parts, in order to estimate a percentage of defective parts.
    However, none of these methods ensures direct control of the elasticity limit for 100% of the parts, or for the base plates of the oil exchangers or ATF, or for parts other than the base plate, nor for Another class of heat exchangers.
    It appears, therefore, necessary to offer an alternative to the state of the art that covers the gaps found therein, by providing a heat exchanger and a method
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    that allows to carry out a test or test of non-destructive quality of some of its parts, directly on each heat exchanger.
    Explanation of the invention.
    To this end, the present invention concerns, in a first aspect, a heat exchanger, which comprises, in a known manner, a first fluid circuit for the circulation of a fluid to be cooled and a second fluid circuit for circulation of a refrigerant fluid, in which the first and second fluid circuits are fluidically isolated from each other and arranged for a heat exchange between said fluid to be cooled and said refrigerant fluid.
    Unlike the heat exchanger known in the state of the art, the one proposed by the first aspect of the present invention comprises, in a characteristic way, at least one part comprising a projection that is an integral part of said part, in that said projection is deformable in a controlled manner under a force exerted thereon, constituting an indicator for a test or test of resistance to deformation.
    According to a preferred embodiment, the projection is made of the same material as the rest of the piece.
    Preferably, said material is a heat-treatable metal material, and the part, including the projection, has been subjected to heat treatment hardening.
    According to one implementation, said material is a heat treatable metal alloy, advantageously a heat treatable aluminum alloy, such as those of the 2000, 6000, 7000 series.
    For an exemplary embodiment, the projection is a folding flange under the action of said force exerted on it.
    According to an exemplary embodiment, said projection constitutes an indicator for an elasticity limit test and / or Young's modulus.
    As regards the piece, according to an embodiment, this is a piece exposed to heat.
    For an exemplary embodiment, the part is a heat exchanger plate.
    According to an embodiment, the projection extends outwardly from an edge of the outer contour of said plate.
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    According to an exemplary embodiment, the heat exchanger of the first aspect of the invention is a stacked plate heat exchanger, and said plate is a base plate to which an exchange core is formed which is formed by a plurality. of stacked plates.
    The present invention also concerns, in a second aspect, a method for performing a quality test of a heat exchanger, in which the heat exchanger is defined in accordance with the first aspect of the invention, and in the that the method comprises:
    a) exert a controlled force on the projection to deform it, for example by means of an actuator; Y
    b) obtain a quality measure with respect to at least one resistance to deformation for said part depending on the deformation caused to the projection in step a).
    According to an example of embodiment of the second aspect of the invention, applied to the previously described example of embodiment of the first aspect for which the projection is a flange, the method comprises:
    - performing said step a) to bend said flange (P) with respect to a folding line, so that it passes through a plurality of angular positions with respect to an axis defined by said folding line, and
    - carry out step b) by means of at least the detection of whether the flange reaches a maximum limit angle in a limit angular position of the plurality of angular positions, where said quality measure determines that the piece has not passed the test of quality if said maximum limit angle has been reached by the tab.
    According to an exemplary embodiment, step b) further comprises measuring the angle reached by the flange at said angular limit position, and correlating said measured angle with a quality measurement value for the part.
    According to an exemplary embodiment, said correlation action is implemented by means of a duly prepared processing or computing system, which stores in memory one or more correlation tables for one or more types of material, which are accessible for some processing means, in order to process them and thus obtain the quality measure value of the piece. Preferably, said processing or computing system is programmable / reconfigurable, as regards the data stored in memory (correlation tables and, optionally, other
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    parameters) and / or to some calculation algorithms that you implement to carry out the quality measurements by processing such data.
    Advantageously, the method comprises holding the piece while the force is exerted on the projection, to avoid displacement of any portion of the part other than that constituted by the projection.
    Other kinds of deformations of the projection other than those explained above are also possible, for other embodiments of the present invention.
    Preferably, the method of the second aspect of the present invention is applied to 100% of the exchangers of a batch or series production of exchangers manufactured, non-destructively, since the only element on which it is operated, deforming it , is the projection, which is an auxiliary element, that is, it is not part of the elements necessary for the operation of the exchanger.
    Brief description of the drawings
    The foregoing and other advantages and features will be more fully understood from the following detailed description of some embodiments with reference to the attached drawings, which should be taken by way of illustration and not limitation, in which:
    Figure 1 is a perspective view of the heat exchanger proposed by the first aspect of the present invention, for an exemplary embodiment for which this is a stacked plate exchanger
    Figure 2 shows in perspective the base plate of the heat exchanger of Figure 1.
    Figure 3 is an elevation and schematic view, illustrating in a simplified manner part of the heat exchanger of Figure 1, and the actions of the method of the second aspect, for an exemplary embodiment.
    Detailed description of some embodiments
    An example of embodiment of the heat exchanger proposed by the first aspect of the present invention is illustrated in Figure 1, for which this is a stacked plate exchanger, which includes a plurality of stacked plates forming an exchange core C and which they define a series of channels that make up a first fluid circuit for the circulation of a fluid to be cooled and a second fluid circuit for the circulation of a cooling fluid, in which the first and second fluid circuits are fluidically isolated from each other and arranged for a heat exchange between the fluid to be cooled and the cooling fluid.
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    As can be seen in Figure 1, the exchange core C is arranged on a base plate M, and attached thereto (generally by strong welding).
    The base plate M, which is illustrated independently in Figure 2, includes a series of fixing points, in this case holes O, provided for fixing it, and with it of the entire exchanger, to a structural element of a vehicle, such as the engine block, as well as openings for the inputs / outputs of any of the two fluid circuits.
    As seen in both Figure 1 and 2, the base plate M comprises a projection P, which is an integral part of the base plate M, which extends outwardly from an edge of the outer contour thereof, and which is deformable in a controlled way under a force F (see Figure 3) exerted on it, constituting an indicator for a deformation resistance test.
    For the illustrated embodiment, the projection P is a folding flange under the action of said force F exerted on it, as seen in Figure 3.
    Figure 3 illustrates, schematically, the heat exchanger of the first aspect of the present invention being subjected to the actions of the method of the second aspect of the invention, in particular its stage a), that is to say the exercise of a controlled force F (according to the arrow illustrated in Figure 3) on the flange P, in this case by means of an actuator A, while being firmly attached to the base plate M, in this case by the element H, in order to bend the tab P with respect to a folding line, so that it passes through a plurality of angular positions with respect to an axis defined by said folding line, until reaching a limit angular position corresponding to an angle p.
    According to the method of the second aspect of the present invention, in particular of its stage b), a quality measurement is obtained with respect to deformation resistance for the base plate piece M, depending on the deformation caused to the projection P in stage a).
    Such a quality measure determines, as a minimum, that the base plate M (and therefore, the exchanger manufactured with it), has not passed the quality test if a maximum limit angle has been reached by the tab P in step a) , that is, if p is equal to or greater than such maximum limit angle.
    Optionally, some protection element can be included that prevents the tab P from bending beyond the said maximum limit angle, such as a stop or a limit switch associated with the actuator A.
    Additionally, for other embodiments, more complex quality measurements are carried out than those explained just above, such as the precise measurement of the angle b and the correlation of the measured value with a quality measurement value for the motherboard M, for example by a processing or computing system appropriate for this purpose, which optionally incorporates tables that correlate different angles with different quality measures, for different parameters, such as the type of material, which are stored in memory and are accessible by processing means to process them and thus obtain the quality measurement value of the base square M (or of any other part that incorporates a projection P).
    A person skilled in the art could introduce changes and modifications in the described embodiments without departing from the scope of the invention as defined in the appended claims.
    权利要求:
    Claims (16)
    [1]
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    1. - Heat exchanger, comprising a first fluid circuit for the circulation of a fluid to be cooled and a second fluid circuit for the circulation of a refrigerant fluid, in which the first and second fluid circuits are fluidly isolated between yes and arranged for a heat exchange between said fluid to be cooled and said cooling fluid, characterized in that at least one part (M) of the heat exchanger comprises a projection (P) that is an integral part of said part (M), which is at least one, in which said projection (P) is deformable in a controlled manner under a force (F) exerted thereon, constituting an indicator for a deformation resistance test.
    [2]
    2. - Heat exchanger according to claim 1, wherein said projection (P) is made of the same material as the rest of the part (M), which is at least one.
    [3]
    3. - Heat exchanger according to claim 2, wherein said material is a heat treatable metal material, and wherein said part (M), which is at least one, including said projection (P), has been subjected to a hardening by heat treatment.
    [4]
    4. - Heat exchanger according to claim 3, wherein said material is a heat treatable metal alloy.
    [5]
    5. - Heat exchanger according to claim 4, wherein said heat treatable metal alloy is a heat treatable aluminum alloy.
    [6]
    6. - Heat exchanger according to any of the preceding claims, wherein said projection (P) is a folding flange under the action of said force (F) exerted thereon.
    [7]
    7. - Heat exchanger according to any one of the preceding claims, wherein said projection (P) constitutes an indicator for a test of elasticity limit and / or Young's modulus.
    [8]
    8. - Heat exchanger according to any one of the preceding claims, wherein said part (M), which is at least one, is a piece exposed to heat.
    [9]
    9. - Heat exchanger according to any one of the preceding claims, wherein said piece, which is at least one, is a plate.
    [10]
    10. - Heat exchanger according to claim 1, wherein the heat exchanger is a stacked plate heat exchanger, and wherein said plate (M) is a base plate to which an exchange core is attached (C), formed by a plurality of stacked plates.
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    [11]
    11. - Heat exchanger according to claim 9 or 10, wherein said projection (P) extends outwardly from an edge of the outer contour of said plate (M).
    [12]
    12. - Method for conducting a quality test of a heat exchanger, wherein said heat exchanger is defined according to any one of the preceding claims, and wherein the method comprises:
    a) exert a controlled force (F) on said projection (P) to deform it; Y
    b) obtaining a quality measure with respect to at least one deformation resistance for said part (M), which is at least one, depending on the deformation caused to the projection (P) in step a).
    [13]
    13. - Method according to claim 12, which comprises exerting said controlled force (F) of step a) by means of an actuator (A).
    [14]
    14. - Method according to claim 12 or 13, wherein said heat exchanger is defined according to claim 6, and wherein the method comprises:
    - performing said step a) to bend said flange (P) with respect to a folding line, so that it passes through a plurality of angular positions with respect to an axis defined by said folding line, and
    - performing said step b) by means of at least detecting if the flange (P) reaches a maximum limit angle at a limit angular position of said plurality of angular positions, where said quality measure determines that the part (M), which is at least one, has not passed the quality test if said maximum limit angle has been reached by the tab (P).
    [15]
    15. The method of claim 14, wherein said step b) further comprises measuring the angle (b) reached by the flange (P) at said angular limit position, and correlating said measured angle (b) with a measured value of quality for the piece (M), which is at least one.
    [16]
    16. - Method according to any one of claims 12 to 15, which comprises holding the part (M), which is the least one, while said force (F) is exerted on the projection (P), to avoid displacement of any portion of the part (M) that is not said projection (P).
    image 1
    OR
    P
    M
    OR
    Fig. 1
    image2
    C
    image3
    Fig. 3
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    同族专利:
    公开号 | 公开日
    ES2681122B1|2019-06-21|
    WO2018162784A1|2018-09-13|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3935730A|1974-10-02|1976-02-03|Thomas & Betts Corporation|Method and gauge for nondestructively testing and certifying the workable qualities of a casting|
    JPS57103811A|1980-12-22|1982-06-28|Hitachi Ltd|Quality control for molded article of plastics|
    JPS58167940A|1982-03-29|1983-10-04|Fujitsu Ltd|Inspecting method of diffusion welded laminated body|
    法律状态:
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    优先权:
    申请号 | 申请日 | 专利标题
    ES201730324A|ES2681122B1|2017-03-10|2017-03-10|HEAT EXCHANGER AND METHOD FOR THE REALIZATION OF A QUALITY TEST OF A HEAT EXCHANGER|ES201730324A| ES2681122B1|2017-03-10|2017-03-10|HEAT EXCHANGER AND METHOD FOR THE REALIZATION OF A QUALITY TEST OF A HEAT EXCHANGER|
    PCT/ES2018/070183| WO2018162784A1|2017-03-10|2018-03-12|Heat exchanger and method for carrying out a quality test on a heat exchanger|
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