EP1998133A1 - Echangeur de chaleur et echangeur de chaleur de type integre - Google Patents

Echangeur de chaleur et echangeur de chaleur de type integre Download PDF

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Publication number
EP1998133A1
EP1998133A1 EP07714836A EP07714836A EP1998133A1 EP 1998133 A1 EP1998133 A1 EP 1998133A1 EP 07714836 A EP07714836 A EP 07714836A EP 07714836 A EP07714836 A EP 07714836A EP 1998133 A1 EP1998133 A1 EP 1998133A1
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
refrigerant
tank
exchanger core
cooling air
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP07714836A
Other languages
German (de)
English (en)
Inventor
Torahide c/o Calsonic Kansei Corporation TAKAHASHI
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Marelli Corp
Original Assignee
Calsonic Kansei Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Calsonic Kansei Corp filed Critical Calsonic Kansei Corp
Publication of EP1998133A1 publication Critical patent/EP1998133A1/fr
Withdrawn legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
    • F28D1/053—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight
    • F28D1/0535—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight the conduits having a non-circular cross-section
    • F28D1/05366—Assemblies of conduits connected to common headers, e.g. core type radiators
    • F28D1/05391—Assemblies of conduits connected to common headers, e.g. core type radiators with multiple rows of conduits or with multi-channel conduits combined with a particular flow pattern, e.g. multi-row multi-stage radiators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
    • F28D1/0408—Multi-circuit heat exchangers, e.g. integrating different heat exchange sections in the same unit or heat exchangers for more than two fluids
    • F28D1/0426—Multi-circuit heat exchangers, e.g. integrating different heat exchange sections in the same unit or heat exchangers for more than two fluids with units having particular arrangement relative to the large body of fluid, e.g. with interleaved units or with adjacent heat exchange units in common air flow or with units extending at an angle to each other or with units arranged around a central element
    • F28D1/0435—Combination of units extending one behind the other
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/0202—Header boxes having their inner space divided by partitions
    • F28F9/0204—Header boxes having their inner space divided by partitions for elongated header box, e.g. with transversal and longitudinal partitions
    • F28F9/0214—Header boxes having their inner space divided by partitions for elongated header box, e.g. with transversal and longitudinal partitions having only longitudinal partitions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/0219—Arrangements for sealing end plates into casing or header box; Header box sub-elements
    • F28F9/0224—Header boxes formed by sealing end plates into covers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/008—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for vehicles
    • F28D2021/0084—Condensers

Definitions

  • the present invention relates to a heat exchanger used as a vehicular air conditioner, and, more particularly relates to a structure of a heat exchanger suitable for an integrated-type capacitor/radiator.
  • an engine for driving the vehicle a radiator for cooling engine cooling water
  • a heat exchanger such as a capacitor (gas cooler) for cooling and condensing a refrigerant of an air conditioner, a cooling fan, and the like.
  • the capacitor and the radiator are closely placed in the engine room in front and rear portions with respect to each other so that the capacitor is located on the windward side and the radiator is located on the leeward side.
  • An integrated-type capacitor/radiator (UCR, hereinafter) in which a capacitor and a radiator are integrated is also becoming widespread.
  • an integrated-type gas cooler/radiator that deals with a CO2 refrigerant is also called UCR.
  • a refrigerant and compressor lubricating oil is circulated.
  • a liquid refrigerant or oil stays in a capacitor that condenses a refrigerant
  • a refrigerant pressure is increased because a refrigerant path is temporarily narrowed. If the pressure exceeds a certain level, the oil that stays in the capacitor is swept away by the refrigerant and the pressure is lowered. If the pressure rise and reduction of the refrigerant are repeated during the operation of the refrigeration cycle, hunting of the refrigeration cycle occurs, which causes a problem that a temperature of adjusted air is also varied.
  • a vertically-flowing type capacitor in which a refrigerant flows vertically has a tendency that hunting is prone to occur due to retention of oil, and in order to make the oil easily flow, the capacitor is preferably of a laterally-flowing type.
  • the radiator In the UCR, oil flows laterally in the radiator like the capacitor so that a fin can be shared.
  • the radiator is preferably of a vertically-flowing type. Further, the radiator is located between cross members in a front portion of the vehicle. Therefore, when the radiator is of the laterally-flowing type, the air-passing area in the radiator is reduced because a heat exchange part is placed in a space other than the cross members through which the cooling air does not flow. This problem is solved by increasing the thickness; however, with this design, a space in the engine room cannot be effectively utilized.
  • Patent Document 1 Japanese Patent Application Laid-open No. 2001-311597
  • Patent Document 2 Japanese Patent Application Laid-open No. H7-332890
  • Patent Document 3 Japanese Patent Application Laid-open No. H10-220919
  • Patent Document 3 discloses a heat exchanger in which a heat exchanging region has three paths, a passage area of a path through which a refrigerant flows upward, and a path resistance of an inner fin are reduced to increase the flow rate so that oil can be easily discharged.
  • an object of the present invention is to provide a heat exchanger capable of preventing hunting caused by oil retention without deteriorating the heat radiation performance, and to provide an integrated-type heat exchanger capable of reducing its cost when it is constituted as a UCR.
  • a heat exchanger that cools an air-conditioning refrigerant by means of cooling air
  • the heat exchanger including: a first heat exchanger core and a second heat exchanger core located forward and backward with respect to a flowing direction of the cooling air, respectively; a first header tank that is provided in a lower portion of the heat exchanger, and has two independent tank portions, one of the two tank portions located on a leeward side of the cooling air being in communication with a refrigerant-inlet side of the second heat exchange core, and the other one of the tank portions located on a windward side being in communication with a refrigerant-outlet side of the first heat exchanger core, the first header tank introducing the refrigerant from the tank portion located on the leeward side, and discharging the refrigerant from the tank portion located on the windward side; and a second header tank that is provided in an upper portion of the heat exchanger, that is in communication with a refrigerant-outlet side
  • the two independent tank portions are separated from each other forward and backward as viewed from the flowing direction of the cooling air.
  • the first header tank is provided with a slit between the two independent tank portions along a longitudinal direction of the first header tank, and the two tank portions are connected to each other in at least one position.
  • An integrated-type heat exchanger according to claim 4 is formed by integrally providing a radiator that cools engine cooling water on a leeward side of the header exchanger according to any one of claims 1 to 3.
  • Fig. 1 is a perspective view of a gas cooler according to the embodiment
  • Fig. 2 is a vertical sectional view of Fig. 1 .
  • a gas cooler 10 includes a first heat exchanger core 20 and a second heat exchanger core 30 that exchange heat between a refrigerant that passes through the gas cooler 10 and cooling air 60, a first header tank 40 that is joined to lower ends of the first heat exchanger core 20 and the second heat exchanger core 30, and a second header tank 50 that is joined to upper ends of the first heat exchanger core 20 and the second heat exchanger core 30.
  • Each of the first heat exchanger core 20 and the second heat exchanger core 30 has a structure in which porous tubes 21 formed with a plurality of tube holes 21a functioning as refrigerant paths, and corrugated cooling fins 22 are alternately laminated.
  • the first heat exchanger core 20 and the second heat exchanger core 30 are placed in front and back positions, respectively, such that the first heat exchanger core 20 is located frontward with respect to the flowing direction of the cooling air 60 (on the windward side of the cooling air 60) and the second heat exchanger core 30 is located backward (on the leeward side of the cooling air 60).
  • the first header tank 40 is located under the first and second heat exchanger cores 20 and 30, and includes two plates 41 and 42 superposed and joined to each other by brazing.
  • a first tank portion 43 and a second tank portion 44 are formed in the first header tank 40.
  • the first tank portion 43 and the second tank portion 44 have substantially semi-circular cross sections, and they function as flowing paths of the refrigerant.
  • the first tank portion 43 and the second tank portion 44 are separated from each other at the central portion in the first header tank 40.
  • the first tank portion 43 and the second tank portion 44 are formed as independent tank portions which are not in communication with each other in the first header tank 40.
  • a refrigerant supply pipe (not shown) is connected to the first tank portion 43, and a refrigerant discharge pipe (not shown) is connected to the second tank portion 44.
  • the first tank portion 43 located on the leeward side as viewed from a flowing direction of the cooling air 60 is in communication with a refrigerant-inlet side of the second heat exchanger core 30, and the second tank portion 44 located on the windward side is in communication with a refrigerant-outlet side of the first heat exchanger core 20.
  • the refrigerant is introduced from the first tank portion 43 located on the leeward side, and the refrigerant is discharged from the second tank portion 44 located on the windward side.
  • the second header tank 50 is placed on the first and second heat exchanger cores 20 and 30, and includes two plates 51 and 52 superposed and joined to each other by brazing.
  • a first tank portion 53 and a second tank portion 55 are formed in the second header tank 50.
  • the first tank portion 53 and the second tank portion 55 have substantially semi-circular cross sections, and they function as flowing paths of the refrigerant.
  • a communication path 55 is formed between the first tank portion 53 and the second tank portion 54, and these tank portions 54 and 55 are in communication with each other.
  • the first tank portion 53 is in communication with a refrigerant-outlet side of the second heat exchanger core 30, and the second tank portion 54 is in communication with a refrigerant-inlet side of the first heat exchanger core 20.
  • the refrigerant that has passed through the second heat exchanger core 30 flows from the first tank portion 53 of the second header tank 50 to the second tank portion 54 through the communication path 55, and then flows into the first heat exchanger core 20.
  • the refrigerant introduced from the first tank portion 43 of the first header tank 40 flows upward through the tube holes 21 (see Fig. 2 ) of the second heat exchanger core 30 and flows into the first tank portion 53 of the second header tank 50.
  • the refrigerant further flows through the communication path 55 into the second tank portion 54, and flows downward through the tube holes 21 of the first heat exchanger core 20, flows into the second tank portion 44 of the first header tank 40, and is discharged outside from the second tank portion 44.
  • heat is exchanged between the refrigerant and the cooling air 60 that flows in a direction intersecting with the flowing direction of the refrigerant when the refrigerant passes through the heat exchanger cores 20 and 30.
  • Fig. 3 is a p-h diagram showing an operation of a refrigeration cycle using a CO2 refrigerant, and shows cycle balance at the time of cooling operation.
  • a section on a high pressure side (a-b) that is equal to or higher than a critical point shows variation in the gas cooler.
  • the refrigerant becomes a liquid refrigerant because the refrigerant condenses.
  • the refrigerant is gaseous when it passes through the first path (second heat exchanger core 30) and the flow rate is high. Thus, it is easy to discharge oil upward.
  • the refrigerant passes through the second path (first heat exchanger core 20)
  • the refrigerant flows downward.
  • the refrigerant flows downward by its own weight, and therefore oil can be easily discharged. Thus, retention of oil does not occur even at the time of low load.
  • the refrigerant flows upward on the leeward side of the first header tank 40, turns around in the second header tank 50, and flows downward on the windward side. Therefore, oil does not stay together with the refrigerant in the second header tank 50 or first heat exchanger core 20, and can flow downward.
  • the pressure of the refrigerant is not increased or decreased during the operation of the refrigeration cycle, and hunting can be suppressed. Therefore, it is possible to keep the temperature of the adjusted air constant.
  • the heat exchanging region is greater as compared with a structure having only one path, and it is possible to prevent the deterioration of the heat radiation performance. Because the number of paths of the refrigerant is two, the refrigerant can easily turn, and the path resistance can be reduced as compared with a structure having three paths. As a result, it is possible to prevent oil from staying in the path as compared with a structure having three paths. Because the number of paths of the refrigerant is two, it is possible to prevent hunting caused by retention of oil without deteriorating the heat radiation performance while using the gas cooler of the vertically-flowing type.
  • the temperature of the refrigerant passing on the leeward side is higher than the temperature of the refrigerant passing on the windward side. Therefore, even if cooling air having passed through the first and second heat exchanger cores flows back into the opposite direction, it is possible to increase a difference between the temperature of the cooling air flowed back and the refrigerant temperature, which reduces the influence exerted on the heat radiation performance.
  • first tank portion 43 and the second tank portion 44 can be placed so that they are separated from each other in the front and back positions as viewed from the flowing direction of cooling air, it is possible to suppress heat exchange between a relatively high-temperature refrigerant introduced into the first tank portion 43 of the first header tank 40 and a refrigerant that has subjected to heat exchange with the cooling air while having passed through the first heat exchanger core 20 and then the second heat exchanger core 30, and that has become low in temperature. Therefore, it is possible to enhance the heat exchange efficiency.
  • the first header tank 40 in which slits 41a and 42a are provided along the longitudinal direction of the first header tank 40 at the central portions of the plates 41 and 42 constituting the first tank portion 43 and the second tank portion 44, and the two tank portions 43 and 44 are connected to each other in at least one position (preferably two or more positions). If such slits 41a and 42a are provided, heat is less prone to be transmitted from the first tank portion 43 to which the high temperature refrigerant is introduced to the second tank portion 44 from which the low temperature refrigerant is discharged. Thus, it is possible to further enhance the heat exchange efficiency.
  • a shielding member 45 may be pasted so as to cover a space between the first tank portion 43 and the second tank portion 44 as shown in Fig. 2 . If such a shielding member 45 is provided, it is possible to prevent a situation in which the cooling air which has passed through the first heat exchanger core 20 located on the windward side passes downward through the slits 41a and 42a. Thus, deterioration of heat exchange efficiency caused by the slits 41a and 42a can be suppressed. To make is difficult for heat from being transmitted from the first tank portion 43 to the second tank portion 44, it is preferable to use a resin material having low thermal conductivity as the shielding member 45.
  • the gas cooler 10 may be integrated with a radiator into a UCR as shown in Fig. 4.
  • Fig. 4 is a vertical sectional view of an UCR 100 that is formed by integrally providing a vertically-flowing type radiator 70 on the leeward side of the gas cooler 10.
  • the gas cooler 10 according to the embodiment when the gas cooler 10 according to the embodiment is combined with the vertically-flowing type radiator 70, parts can be formed integrally as one unit, and its structure can be simplified, and thus cost thereof can be reduced. Further, even when the gas cooler is placed between cross members of a vehicle, upper and lower header tanks can be located behind the cross members. Therefore, an air-passing area is not reduced unlike a case of using the laterally-flowing type radiator, and it is unnecessary to increase its thickness. Thus, it is possible to effectively utilize a space in the engine room.
  • engine cooling performance can be enhanced, the heat exchanger can be reduced in size as compared with a case of using the laterally-flowing type radiator, and an amount of engine cooling water can also be reduced.
  • a vehicle can be reduced in weight.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details Of Heat-Exchange And Heat-Transfer (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Air-Conditioning For Vehicles (AREA)
EP07714836A 2006-03-01 2007-02-23 Echangeur de chaleur et echangeur de chaleur de type integre Withdrawn EP1998133A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2006055187A JP2007232287A (ja) 2006-03-01 2006-03-01 熱交換器および一体型熱交換器
PCT/JP2007/053365 WO2007099868A1 (fr) 2006-03-01 2007-02-23 Echangeur de chaleur et echangeur de chaleur de type integre

Publications (1)

Publication Number Publication Date
EP1998133A1 true EP1998133A1 (fr) 2008-12-03

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EP07714836A Withdrawn EP1998133A1 (fr) 2006-03-01 2007-02-23 Echangeur de chaleur et echangeur de chaleur de type integre

Country Status (4)

Country Link
US (1) US20090050298A1 (fr)
EP (1) EP1998133A1 (fr)
JP (1) JP2007232287A (fr)
WO (1) WO2007099868A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014131756A1 (fr) * 2013-02-27 2014-09-04 Behr Gmbh & Co. Kg Échangeur de chaleur
CN107003073A (zh) * 2014-11-26 2017-08-01 开利公司 耐霜冻微通道热交换器
EP3156752A4 (fr) * 2014-06-13 2018-02-21 Mitsubishi Electric Corporation Échangeur thermique
GB2581478A (en) * 2019-02-13 2020-08-26 Jaguar Land Rover Ltd Motor vehicle counterflow radiator, engine cooling circuit, vehicle and method of cooling an engine
EP3805651A4 (fr) * 2018-06-11 2021-06-16 Mitsubishi Electric Corporation Unité extérieure de climatiseur et climatiseur associé
IT202100000920A1 (it) * 2021-01-20 2022-07-20 Denso Thermal Systems Spa Scambiatore di calore, in particolare condensatore interno per sistemi hvac con pompa di calore

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KR101543608B1 (ko) 2009-09-28 2015-08-11 한온시스템 주식회사 수냉식 콘덴서
EP3298339B1 (fr) 2015-05-22 2020-04-15 Modine Manufacturing Company Échangeur de chaleur et réservoir d'échangeur de chaleur
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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014131756A1 (fr) * 2013-02-27 2014-09-04 Behr Gmbh & Co. Kg Échangeur de chaleur
US9874405B2 (en) 2013-02-27 2018-01-23 Mahle International Gmbh Heat exchanger
EP3156752A4 (fr) * 2014-06-13 2018-02-21 Mitsubishi Electric Corporation Échangeur thermique
CN107003073A (zh) * 2014-11-26 2017-08-01 开利公司 耐霜冻微通道热交换器
EP3805651A4 (fr) * 2018-06-11 2021-06-16 Mitsubishi Electric Corporation Unité extérieure de climatiseur et climatiseur associé
EP4279850A3 (fr) * 2018-06-11 2024-03-06 Mitsubishi Electric Corporation Unité extérieure d'appareil de climatisation et appareil de climatisation
GB2581478A (en) * 2019-02-13 2020-08-26 Jaguar Land Rover Ltd Motor vehicle counterflow radiator, engine cooling circuit, vehicle and method of cooling an engine
GB2581478B (en) * 2019-02-13 2021-09-22 Jaguar Land Rover Ltd Motor vehicle counterflow radiator, engine cooling circuit, vehicle and method of cooling an engine
IT202100000920A1 (it) * 2021-01-20 2022-07-20 Denso Thermal Systems Spa Scambiatore di calore, in particolare condensatore interno per sistemi hvac con pompa di calore
EP4033189A1 (fr) * 2021-01-20 2022-07-27 DENSO THERMAL SYSTEMS S.p.A. Echangeur de chaleur, notamment condenseur interieur pour systemes hvac de pompe a chaleur

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Publication number Publication date
WO2007099868A1 (fr) 2007-09-07
US20090050298A1 (en) 2009-02-26
JP2007232287A (ja) 2007-09-13

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