• 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:
    An outlet manifold (20) for heat exchanger (10). The outlet manifold defines a flow bypass conduit (26) and includes an L-shaped tube (52). The L-shaped tube defines a first (54) and a second (56) tab. The first leg is firmly installed in the flow bypass conduit so that the second leg is directed to a cold-cold corner (58) of the heat exchanger. The second tab is designed to capture cold air from the cold-cold corner to provide cold air to the flow bypass duct and to the outside of the heat exchanger, and through them. this.
    公开号:FR3019278A1
    申请号:FR1550740
    申请日:2015-01-30
    公开日:2015-10-02
    发明作者:Anthony Delugan；Diana Shiroma
    申请人:Hamilton Sundstrand Corp；
    IPC主号:
    专利说明:

    [0001] BACKGROUND OF THE INVENTION [0001] This invention generally relates to environmental control systems (ECS) for an aircraft, and more particularly to an air-conditioning system thereof. In an aircraft, fuel mixtures and air (called "dead volume") in an air space in a fuel tank of the aircraft can for example be flammable and therefore dangerous. To limit this possibility, an inert gas production system on board ("OBIGGS") can be used on the aircraft. More specifically, the OBIGGS dilutes the dead volume by reducing its oxygen content and adds nitrogen enriched air (NEA) to it. In particular, OBIGGS separates oxygen from ambient air and pumps oxygen-depleted and relatively inert NEA to the fuel tank. The OBIGGS can produce the NEA using an OBIGGS air separation module ("ASM"). ASM operates most efficiently - in terms of permeability of oxygen through ASM - at elevated temperature (usually in an optimum range of about 49 ° C to 82 ° C (180 to about 210 ° F). Compressed or pressurized (high temperature) air is used for the production of NEA, to which end the aircraft includes a typical ECS in the form of a machine, a kit or a an air-conditioning system mounted on an outer part of a pressure vessel of the aircraft, the pressurized air usually comes either from the purging of an aircraft engine ("purge air") or from Another source of pressure within the aircraft is that the purge air is warmer and is usually treated (cooled) through a heat exchanger. [55] More specifically, the heat exchanger is a dual air / air heat exchanger and includes integrated primary and secondary heat exchangers that share The primary heat exchanger hot water circuit is supplied with purge air and cooled by the available ambient air which is sucked in by a fan or "dynamic" air. Forced from another source of cooling air. The primary heat exchanger conveys cooled air to a residue of the air conditioning system through an outlet pipe of the primary heat exchanger. The primary heat exchanger delivers cooled air to the OBIGGS through a smaller flow bypass pipe of an outlet manifold of the primary heat exchanger. A longer line is connected in operation to the bypass line and to the OBIGGS and to each other, and the cooled air flows from the heat exchanger to the OBIGGS through the longer line. However, the heat exchanger may not sufficiently cool the pressurized air (i.e., within the optimum temperature range before the cooled air is vented to the OBIGGS). Specifically, while the ambient air meets a flow requirement of a maximum operating condition of approximately 50 ° C (122 ° F), an upper limit of 98.8 ° C (210 ° F) for air cooled to the OBIGGS may be exceeded. Thus, a minimum air temperature routed to the OBIGGS exceeds the optimal temperature range to activate the OBIGGS effectively. Even if the pressurized air passes through the primary heat exchanger and the cooling air from the cooling air source passing through the primary heat exchanger can be modulated, the air temperature flows through the primary heat exchanger. to OBIGGS may be greater than 98.8 ° C (210 ° F). It is therefore desirable to obtain an air conditioning system of an aircraft that conveys air to the OBBIGS in an optimum temperature range. More specifically, it is desirable to benefit from a leveling solution for a state of "superheating" of the air leaving the flow bypass duct of the outlet manifold of the heat exchanger and which is conveyed to the OBIGGS.
    [0002] BRIEF DESCRIPTION OF THE INVENTION [0009] According to a non-limiting embodiment of the invention, an outlet manifold of a heat exchanger defines a flow bypass duct and comprises an L-shaped tube. defines first and second legs. The first leg is installed in the flow bypass conduit with fasteners such that the second leg is directed to a cold-cold corner of the heat exchanger. The second tab is designed to capture cold air from the cold-cold corner to provide cold air to the flow bypass duct and to the outside of the heat exchanger, and through them. this. It is further provided a heat exchanger comprising an outlet manifold containing a flow bypass duct, and an L-shaped tube defining first and second legs, the first tab being firmly installed in the branch duct d flow so that the second leg is directed to a cold-cold corner of the heat exchanger and is designed to capture cold air from the cold-cold wedge to conduct cold air to the bypass duct. flow and out of and through the heat exchanger. Advantageously, the cold-cold corner can be defined by a volume of an inner portion of the heat exchanger which is closer to a source of cold air when entering the air corresponding cold in the heat exchanger and opposite a source of hot air flow when purge air enters the primary heat exchanger. Advantageously, the first lug can be received with coupling in the flow bypass duct so that a first end of the first lug lodges slightly inside a free end of the flow bypass duct. and a second end of the first tab extending at least slightly in an interior portion of the output manifold. Advantageously, the first tab can define a pair of opposed holes designed to receive a fastener, in order to mechanically install the L-shaped tube to the flow bypass duct and therefore to the outlet manifold. Advantageously, the attachment may be a combination of bolt, nut and curved washer. Advantageously, the epoxy can fill the gap between the first leg and the flow bypass duct in the installation by acting as a secondary form of retention between the first leg and the flow bypass duct . Advantageously, the second tab may be positioned inside the outlet manifold and spaced from an inner side of the outlet manifold. [0017] Advantageously, the L-shaped tube may be configured to be leveled with respect to an existing flow diversion duct. Advantageously, the attachment may be a rivet disposed in each of the holes. BRIEF DESCRIPTION OF THE DRAWINGS [0019] The subject who is considered as the invention is particularly stated and clearly claimed among the claims at the end of the description. The foregoing and other features and advantages of the invention appear from the following detailed description taken in conjunction with the following accompanying drawings. Figure 1 is a top view in perspective of an example of a dual air-air heat exchanger comprising primary and secondary integrated heat exchangers which mutually share a source of cooling air. Figure 2 is a bottom view in perspective of a non-limiting embodiment of an output manifold according to the invention with a conduit "OBIGGS" partial attached to him. Figure 3 is a side view of a non-limiting embodiment of an L-shaped tube of the output manifold according to the invention, illustrated in Figure 2. Figure 4 is a view of partial side of the outlet manifold according to the invention, illustrated in Figure 2, showing the first leg of the L-shaped tube fixedly installed in the flow bypass duct. DETAILED DESCRIPTION OF THE INVENTION [0024] Referring to FIG. 1, an example of a heat exchanger 10 is shown. The heat exchanger shown in the figure and described below is designed for a use with a typical Environmental Control System (ECS) in the form of a machine, kit or air conditioning system mounted on an outer side of a pressure vessel of an aircraft. The air conditioning system operates to deliver conditioned air to other parts of the aircraft at an appropriate temperature and pressure. It will be appreciated, however, that the heat exchanger 10 may be configured to be used with any suitable system, whether or not related to an aircraft. More specifically, the heat exchanger 10 is a double air-to-air heat exchanger 10 and includes integrated primary and secondary heat exchangers 12, 14 connected in series and mutually sharing a source of cooling air. The primary heat exchanger 12 defines a primary purge duct or line 16, a primary duct 18 and an outlet manifold 20. The primary purge duct 16, the primary duct 18 and the outlet manifold 20 in turn define a primary purge inlet 22, a primary outlet 24 and a smaller flow bypass conduit 26. The flow bypass conduit 26, in turn, defines a flow bypass outlet 28. single-feed dynamic output defines a fan or ACM-air duct 30 and a dynamic exhaust duct 32 (ACM stands for "Air Cycle Machine"). The ACM-air duct 30 and the dynamic exhaust duct 32 respectively define an ACM-air outlet 34 and a dynamic exhaust outlet 36. The dynamic air from the primary and secondary heat exchangers 12, 14 is mixed. in a fan-diffuser housing (FIDH). The straight arrows in the figure schematically represent the direction of air flow to, through and / or from the respective lines 16, 18, 26, 30, 32, inputs 22 and outputs 24, 28, 34, 36 of the primary and secondary heat exchangers 12, 14. As described in more detail below, the ambient or dynamic air 38 flows to a front portion of the primary heat exchanger 12 and therethrough, the compressed or pressurized (high temperature) air 40 flows to the primary purge line 16 and the inlet 22 and through them the cooled air 42 flows through the conduit 18 and the outlet 24 and from them, the cooled air 44 flows through the flow bypass conduit 26 and the outlet 28 and from these, the air 46 is flows through ACM-air 30 and outlet 34 and from there, and air 48 flows through dynamic exhaust line 32 and the output 36 and from them. The heat exchanger 10 receives the compressed air 40 from a motor of the aircraft at the primary purge inlet 22. Typically, the air 40 is purged out of the engine ("purge air" ) and compressed, whereby the air 40 passes through control valves (not shown) to establish an air pressure 40. The purge air 40 goes into the primary heat exchanger 12 where the purge air 40 is cooled using a dynamic air blower (not shown). The dynamic air blower usually draws dynamic air 38 out of the aircraft to the heat exchanger 10 to cool the primary air stream or process flow air (e.g. purge air 40 ) and then causes the dynamic cooling air to flow through the air flow 46 to the fan through the ACM-air line 30, which in the end leaks the flow of air 48 outside the aircraft through the dynamic exhaust outlet 36. The dynamic air 38 acts to cool the purge air 40 by entering the heat exchanger 12. The heat exchanger 12 can cool the process flow air, for example about 204 ° C (400 ° F) to about 93 ° C (200 ° F). The air is then transferred to the secondary heat exchanger 14, which also uses the dynamic air 38 to cool the primary air flow further, for example, from about 176 ° C (350 ° F) to about 66 ° C. ° C (150 ° F). It will be appreciated that the available ambient air can also be drawn in by a fan. The heat exchanger 10 may be made from aluminum or any other metal capable of withstanding operating temperatures and stresses. If we refer to Figure 2, we see a non-limiting embodiment of the output manifold 20, according to the invention. As can be seen, the flow bypass duct 26 extends integrally and substantially linearly from an outer side 50 of the outlet manifold 20 and substantially perpendicular to the side 50. In FIG. flow 26 appears positioned on one end of the side 50 located next to the front of the heat exchanger 10, and the side 50 appears positioned on the same side of the heat exchanger 10 as the primary purge pipe 16. Thus, the side 50 is substantially close to the source of cold air / dynamic air 38 during the entry of the dynamic air 38 into the primary heat exchanger 12. [0031] In general, an L-shaped tube 52 defines first and second lugs 54, 56. The first lug 54 is firmly installed in the bypass conduit 26, so that the second lug 56 is directed to a cold-cold corner 58 of the heat exchanger 10 and designed to capture cold air 60 from cold-cold corner 58 to convey cold air 60 to and through the flow bypass duct and out of the heat exchanger 10. More specifically, and if one refers to Figures 2 to 4, the first tab 54 is longer than the second tab 56. The first and second tabs 54, 56 are substantially uniform and formed at a substantially right angle relative to each other, so that the first and second legs 54, 56 meet at substantially sharp corners. The first and second lugs 54, 56 also define a substantially circular cross section. The first lug 54 is received in coupling in the flow bypass conduit 26, so that a first end of the first lug 54 is slightly inside a free end of the bypass duct. flow 26 and a second end of the first tab 54 extends at least slightly towards an inner portion 62 of the outlet manifold 20. The free end of the flow bypass conduit 26 defines a flange 66 slightly towards the Inside a lip 64. At least one hole 68 is defined in the first tab 54 and adapted to receive a fastener 70 for a mechanical installation of the L-shaped tube 52 to the flow bypass conduit 26 and thus to the outlet manifold 20 In one aspect of this embodiment, a pair of opposing holes 68 (only one of which is shown in the figures) is defined as follows. In FIG. 4, the attachment 70 is a combination of a bolt 72, a nut 74 and two curved washers 76. The epoxy may for example be used to fill any gap between the first leg 54 and the bypass duct in the installation and acts as a secondary form of retention between the first lug 54 and the flow bypass conduit 26. The L-shaped tube 52 is also configured to be leveled as a bypass duct 26. It will be appreciated that the fastener 70, for example in a leveling application, may be a rivet placed in each hole 68 (not shown) or a combination of an uncoupling bolt with curved bearings and corresponding washers (not shown). It will be appreciated that the L-tube 52 may be adhesively installed (eg, epoxy sealed) or welded to the flow bypass conduit 26. The second tab 56 is positioned within the interior of the housing 62. outlet manifold 20 and spaced from an inner side 78 of the outlet manifold 20. The second tab 56 extends downwardly to at least a lower portion of the outlet manifold 20 and is located just above a surface of a primary heat exchanger 12, which is cold-cold corner 58. In particular, the cold-cold corner is defined by a volume of an inner portion of the primary heat exchanger 12 which is at closer to the cold air / dynamic air source 38 at the dynamic air inlet 38 in the primary heat exchanger 12 and away from a source of hot air at the inlet of the purge air 40 in the primary heat exchanger 12. During operation, the purge air 40 is used for the production of nitrogen enriched air (NEA). A primary or hot circuit of the primary heat exchanger 12 is supplied by the purge air 40 and cooled by the dynamic air 38 which is sucked by the dynamic air fan, and passes through the primary heat exchanger 12 The primary heat exchanger 12 conveys cooled air 42 to a remainder of the air conditioning system through the primary duct 18 and the outlet 24. The L-shaped tube 52 captures the cold air 60 from the cold-cold wedge 58 and conveys the cold air 60 to and through the flow bypass conduit 26 as cooled air 44. The primary heat exchanger 12 conveys the cooled air 44 to a gas generating system internal inert ("OBIGGS") (not shown) through the flow bypass conduit 26 and the outlet 28. A longer conduit (not shown) is connected during operation to the flow bypass conduit 26 and the OBIGGS and between them, and the cooled air 44 flows from the heat exchanger 10 to the OBBIGS through the longer pipe. It is necessary that a cooled air temperature 44 in the longer pipe being conveyed to the OBBIGS does not exceed about 98.8 ° C (210 ° F). It will be appreciated that the L-shaped tube 52 may be of any suitable shape, size and structure and that it has any suitable relationship with the flow bypass conduit 26 and with the outlet 28, in particular and with the outlet manifold 20 and the primary heat exchanger 12, in general. It will also be appreciated that the first and second legs 54, 56 can have any appropriate mutual relationship. It will also be appreciated that the L-tube 52 can be firmly installed in the flow bypass conduit 26 in a suitable manner. It will also be appreciated that the L-shaped tube 52 may be directed to the cool-cold corner 58 in any suitable manner, so that the L-shaped tube can capture fresh air 60 from the cold-cold corner 58 by any suitable means. . It will also be appreciated that the L-shaped tube can be made of any suitable material. With the heat exchanger 10, an air conditioning system of an aircraft can be designed to route air to the OBBIGS within an optimum temperature range. More specifically, the heat exchanger 10 constitutes a leveling solution in a state of "superheating" of the cooled air 44 leaving the flow diversion duct 26 of the outlet manifold 20 of the heat exchanger 12 and routed to the OBIGGS. The heat exchanger 10 also constitutes a solution without destructive remanufacturing of the heat exchanger 10. While the invention has been described in detail in connection with only a limited number of embodiments, it will be easy to understand that the invention is not limited to these embodiments described. In fact, the invention may be modified to incorporate any number of variants, alterations, substitutions or equivalent arrangements not heretofore described, but which are related to the spirit and scope of the invention. . In addition, while various embodiments have been described, it will be understood that aspects of the invention may include only some of the described embodiments. Accordingly, the invention is not to be construed as limited by the foregoing description, but is only limited by the scope of the appended claims.
    权利要求:
    Claims (15)
    [0001]
    REVENDICATIONS1. An outlet manifold (20) of a heat exchanger (10), comprising: a flow bypass conduit (26); and an L-shaped tube (52) defining a first (54) and a second (56) tab, the first tab being firmly installed in the flow bypass duct so that the second tab is directed to a cold wedge. heat exchanger (58) and designed to capture cold air from the cold-cold wedge to conduct cold air to the flow bypass duct and out of the heat exchanger. heat and through these. 10
    [0002]
    The outlet manifold (20) according to claim 1, wherein the cold-cold wedge (58) is defined by a volume of an inner portion of the heat exchanger (10) which is nearest to a source of cold air when entering the corresponding cold air into the heat exchanger and away from a source of hot air flow when entering the purge air into the primary heat exchanger. 15
    [0003]
    An outlet manifold (20) according to any one of claims 1 or 2, wherein the first tab (54) is matingly received in the flow bypass duct (26) so that a first end of the first lug fits slightly inside a free end of the flow bypass duct, and a second end of the first lug extending at least slightly in an interior portion of the outlet manifold.
    [0004]
    An outlet manifold (20) according to any one of claims 1 to 3, wherein the first tab (54) defines a pair of opposing holes (68) adapted to receive a fastener (70) for mechanically installing the L-tube (52) to the flow bypass duct (26) and thus to the outlet manifold. 25
    [0005]
    An outlet manifold (20) according to claim 4, wherein the fastener (70) is a combination of bolt, nut and curved washer.
    [0006]
    The outlet manifold of any one of claims 1 to 5, wherein epoxy encloses any gap between the first lug (54) and the flow bypass duct (26) in the installation by acting as a secondary form of retention between the first leg and the flow bypass duct.
    [0007]
    An outlet manifold as claimed in any one of claims 1 to 6, wherein the second tab (56) is positioned within the outlet manifold and spaced from an inner side of the outlet manifold.
    [0008]
    An outlet manifold as claimed in any one of claims 1 to 7, wherein the L-shaped tube (52) is configured to be leveled with respect to an existing flow bypass duct.
    [0009]
    A heat exchanger (10) comprising: an outlet manifold (20) containing: a flow bypass conduit (26); and an L-shaped tube (52) defining a first (54) and a second (56) tab, the first tab being firmly installed in the flow bypass duct so that the second tab is directed to a cold corner. heat exchanger (58) and designed to capture cold air from the cold-cold wedge to conduct cold air to the flow bypass duct and out of the heat exchanger. heat and through these. 20
    [0010]
    The heat exchanger (10) according to claim 9, wherein the cold-cold wedge (58) is defined by a volume of an inner portion of the heat exchanger that is closest to a source of heat. cold air when entering the corresponding cold air into the heat exchanger and away from a source of hot air flow when entering purge air into the primary heat exchanger.
    [0011]
    The heat exchanger (10) according to claim 9 or 10, wherein the first leg (54) is matingly received in the flow bypass duct (26) so that a first end of the first leg is housed slightly inside a free end of the flow bypass duct and a second end of the first lug extends at least slightly in an interior portion of the outlet manifold (20).
    [0012]
    The heat exchanger (10) according to any one of claims 9 to 11, wherein the first tab (54) defines a pair of opposed holes (68) adapted to receive a fastener (70) for mechanically installing the L-tube (52) to the flow bypass duct (26) and thus to the outlet manifold (20).
    [0013]
    The heat exchanger (10) of claim 12, wherein the fastener (70) is a rivet disposed in each of the holes (68).
    [0014]
    The heat exchanger (10) according to any one of claims 9 to 13, wherein epoxy encloses any gap between the first lug (54) and the flow bypass conduit (26) in the installation, acting as a secondary form of retention between the first leg and the flow bypass duct.
    [0015]
    The heat exchanger (10) according to any one of claims 9 to 14, wherein the second leg (56) is positioned within the outlet manifold (20) and spaced from an inner side of the manifold Release. 10
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    US20150276331A1|2015-10-01|
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    DE10313681A1|2003-03-26|2004-10-07|Basf Ag|Process for the preparation of polyamides|
    FR2967249B1|2010-11-09|2012-12-21|Valeo Systemes Thermiques|HEAT EXCHANGER AND METHOD OF FORMING RELATED DISTURBERS|
    JP5913913B2|2011-11-07|2016-04-27|サンデンホールディングス株式会社|Indoor condenser|US10124452B2|2013-08-09|2018-11-13|Hamilton Sundstrand Corporation|Cold corner flow baffle|
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    法律状态:
    2015-12-22| PLFP| Fee payment|Year of fee payment: 2 |
    2016-12-21| PLFP| Fee payment|Year of fee payment: 3 |
    2017-12-21| PLFP| Fee payment|Year of fee payment: 4 |
    2018-01-12| PLSC| Publication of the preliminary search report|Effective date: 20180112 |
    2018-12-20| PLFP| Fee payment|Year of fee payment: 5 |
    2019-12-19| PLFP| Fee payment|Year of fee payment: 6 |
    2020-12-17| PLFP| Fee payment|Year of fee payment: 7 |
    2021-12-15| PLFP| Fee payment|Year of fee payment: 8 |
    优先权:
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    US14/230,798|US10995994B2|2014-03-31|2014-03-31|Outlet header of heat exchanger|
    US14/230,798|2014-03-31|
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