KR101890199B1 - Device for heat transfer - Google Patents

Device for heat transfer Download PDF

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Publication number
KR101890199B1
KR101890199B1 KR1020150128056A KR20150128056A KR101890199B1 KR 101890199 B1 KR101890199 B1 KR 101890199B1 KR 1020150128056 A KR1020150128056 A KR 1020150128056A KR 20150128056 A KR20150128056 A KR 20150128056A KR 101890199 B1 KR101890199 B1 KR 101890199B1
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KR
South Korea
Prior art keywords
housing
elements
heat exchanger
tubes
fluid
Prior art date
Application number
KR1020150128056A
Other languages
Korean (ko)
Other versions
KR20160045006A (en
Inventor
펠릭스 기르쉐이드
게로 슈메이커
플로리안 비에르거
피터 헤일
송준영
임홍영
Original Assignee
한온시스템 주식회사
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Publication of KR20160045006A publication Critical patent/KR20160045006A/en
Application granted granted Critical
Publication of KR101890199B1 publication Critical patent/KR101890199B1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/32—Cooling devices
    • B60H1/3204—Cooling devices using compression
    • B60H1/3227—Cooling devices using compression characterised by the arrangement or the type of heat exchanger, e.g. condenser, evaporator
    • 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
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
    • F28D7/1684—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation the conduits having a non-circular cross-section
    • F28D7/1692—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation the conduits having a non-circular cross-section with particular pattern of flow of the heat exchange media, e.g. change of flow direction
    • 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
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/0008—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one medium being in heat conductive contact with the conduits for the other medium
    • F28D7/0025—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one medium being in heat conductive contact with the conduits for the other medium the conduits for one medium or the conduits for both media being flat tubes or arrays of tubes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
    • F28F21/081—Heat exchange elements made from metals or metal alloys
    • F28F21/084—Heat exchange elements made from metals or metal alloys from aluminium or aluminium alloys
    • 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
    • F28F9/0246—Arrangements for connecting header boxes with flow lines
    • F28F9/0251—Massive connectors, e.g. blocks; Plate-like connectors
    • F28F9/0253—Massive connectors, e.g. blocks; Plate-like connectors with multiple channels, e.g. with combined inflow and outflow channels
    • 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
    • F28F9/04—Arrangements for sealing elements into header boxes or end plates
    • 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
    • F28F9/04—Arrangements for sealing elements into header boxes or end plates
    • F28F9/16—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling
    • F28F9/18—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by welding
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B39/00—Evaporators; Condensers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2275/00—Fastening; Joining
    • F28F2275/04—Fastening; Joining by brazing

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

The present invention particularly relates to a heat transfer device (1) for transferring heat between a first fluid and a second fluid. The apparatus 1 comprises a heat exchanger 2 formed from tubes for guiding a first fluid which is at least partly disposed in a volume completely enclosed by the enclosed housing 11. The heat exchanger 2, Wherein the housing 11 is formed in various parts to guide a second fluid around a tube of one or more housing elements 12,13 and one or more side wall elements 14a, 14b.
The one or more sidewall elements 14a and 14b are provided with a through opening 15 and are formed tightly and fluidly connected to the heat exchanger 2. The through openings (15) coincide with the external shape of the tubes of the heat exchanger (2) in their respective shapes. The tubes are arranged so as to pass through the through-hole (15).
The present invention also relates to a method for manufacturing a heat transfer device (1), in which case a heat transfer device (1) is arranged through the through opening (15) of one or more side wall elements (14a, 14b) 2) The brazing of the tubes and the brazing of the one or more sidewall elements 14a, 14b takes place in one manufacturing process.

Description

TECHNICAL FIELD [0001] The present invention relates to a heat transfer device,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a heat transfer apparatus, particularly for a passenger car. At this time, heat is preferably transferred between the refrigerant as the first fluid and the second fluid in the liquid state. The apparatus includes a heat transfer unit formed from tubes for guiding the first fluid, wherein the heat transfer unit is at least partially disposed within a volume completely enclosed by the enclosed housing. The housing is formed in various portions to guide the second fluid around the tube, which is comprised of the at least one housing element and the at least one sidewall element.

As the fluid in the liquid state, water or a water-glycol mixture which absorbs heat from the coolant or releases heat into the coolant may be used. As the refrigerant, carbon dioxide, which is also referred to as R744 or CO 2 , is preferably used.

The prior art discloses an air conditioning system for a passenger car having a refrigerant circulation system and a heat transfer unit integrated in the refrigerant circulation system, in which case the heat transfer unit is used as an evaporator, on the one hand, And on the other hand as a condenser for heating fluid in a liquid state. A heat exchanger, on which refrigerant is on the one hand and liquid on the other hand, for example water or a water-glycol mixture, is also called a chiller.

When the evaporator is perfused, the refrigerant evaporates, and when the condenser is perfused, the refrigerant is liquefied. Thus, the condenser of the refrigerant circulation system is operated in a liquid-cooled state. The heat transfer between the fluid in the liquid state and the refrigerant takes place simultaneously with the phase change of the refrigerant.

In the refrigerant circulation system, conventional refrigerants such as R134a and 1234yf, which have much lower pressure than carbon dioxide, circulate.

Heat exchangers for refrigerants such as R134a and 1234yf, known in the prior art, are formed as plate heat exchangers. In this case, not only the liquid state fluid, which is also referred to as a coolant in the following, but also the refrigerant is guided through the plate. The coolant and the coolant respectively flow inside the plate. At this time, the plates made of thin aluminum plate or steel plate each correspond to the level of strength of the refrigerant at a predetermined pressure. If the heat transfer unit is operated as an evaporator, the internal operating pressure is about 4 bar, in which case the bursting pressure reaches about 31 bar. When the heat exchanger is operated as a condenser, so-called high pressure chiller, the internal operating pressure is about 18 bar and the burst pressure is about 60 bar.

For refrigerant R744, which plays an increasingly important role not only in terms of burst pressure but also in operating pressure and good environmental friendliness, it is about 10 times higher than in refrigerant R134a or 1234yf when the temperature requirements are the same. In the case of R744 application, the rupture pressure is set at about 260 bar for the evaporator and about 340 bar for the gas cooler.

For example, when operation is performed below the threshold using refrigerant R134a or when liquefaction of the refrigerant is achieved in certain ambient conditions using carbon dioxide, the heat transfer unit is termed a condenser. Part of the heat exchange takes place at a constant temperature. If the operation is made above the threshold value in the heat transfer or if the heat is discharged above the threshold, the temperature of the refrigerant is reduced constantly. In this case, the heat transfer unit is also referred to as a gas cooler.

In order to accommodate much higher strength requirements, the walls of the plate sheet may be formed with a much thicker thickness and / or from other materials such as special steels. However, heat exchangers made from thicker walls and / or special steels have very heavy weight and large installation space, and are very cost-intensive during manufacture and maintenance. The requirements for the coolant side are largely independent of the refrigerant used.

A European patent application EP 2 402 694 A1 proposes a heat exchanger for an automotive air conditioning system, which operates as a heat transfer device, in particular as a condenser. The condenser has a tube bundle and a housing for transferring heat between the refrigerant and the coolant, wherein the refrigerant is guided through tubes of the tube bundle, and the coolant is guided through the housing. The coolant flows around the tube from the outer surface. The tubes are in communication with the interior of the element, which is formed with the collector, respectively, at the ends. The heat transfer unit operates within a cross current. The material of the housing is plastic.

As a system known and known in the prior art, a heat exchanger which can operate substantially as a condenser or can operate as a gas cooler when carbon dioxide is present in excess of the threshold is used, in which case Heat is transferred from the refrigerant to the coolant. The heat exchanger is provided with a lamella disposed between the tubes of the tube bundle, which enlarges the heat exchange area at the outer surface of the tube and is in thermal contact with the tubes. Thin films formed from materials with very good thermal conductivity are in thermal contact with the tubes to enable thermal conduction. Thin films consist of metal, especially aluminum or steel, which are likewise preferably placed in contact with tubes made from the same material.

It is an object of the present invention to provide an apparatus for efficiently transferring heat between two fluids, in particular, between a refrigerant and a fluid in a liquid state as a coolant. Depending on the heat transfer, the maximum heat output must be able to be delivered when the size of the structure is minimal or when the space requirement is minimal. The fluids should only have as little pressure loss as possible when passing through the heat transfer unit. In order to be able to match the increased pressure requirements and to replace the conventional heat exchanger for known refrigerants, for example R134a, so as to reach at least the same power and at the same maximum of the same dimensions of the components, Should be suitable for operation with. In addition, the heat transfer unit must have a minimum weight and must cause minimal manufacturing and material costs.

At this time, the name "coolant" is not solely related to the heat transfer from the coolant to the coolant, or "cool" Heat transfer from the coolant to the refrigerant must likewise be possible.

This problem is solved by objects having the features of the independent patent claims. Improvements are described in the dependent patent claims.

The above problem is solved by a heat transfer device according to the invention, in particular an apparatus for transferring heat between a first fluid and a second fluid. The apparatus includes a heat transfer unit formed from tubes for guiding the first fluid, the heat transfer unit being disposed at least partially within a volume completely enclosed by the enclosed housing. The housing is formed in various portions to guide the second fluid around a tube comprising one or more housing elements and one or more sidewall elements.

In accordance with the inventive concept, one or more sidewall elements having a through opening are tightly and fluidly connected to the heat transfer unit. The shape of the through openings coincides with the external shape of the heat transfer tube, respectively. The tubes are arranged so as to pass through the through openings.

At this time, preferably one tube each penetrates one through opening, resulting in exactly one through opening being assigned to each tube end.

The fixed connection of the heat transfer tube and the sidewall element and the resulting fixed connection of the heat transfer element and the sidewall element can be understood as a technically sealed zero-leakage coupling, resulting in an additional A sealing element need not be formed. The housing seals at least portions of at least the heat exchanger to the periphery.

According to one preferred embodiment of the invention, the housing has two side wall elements with a through opening. These side wall elements are tightly and fluidly connected to the heat transfer device. The through openings each coincide with the external shape of the heat transfer tubes in shape. Each of the individual tubes is disposed so as to pass through a through opening formed in the first sidewall element by the first end portion and through the through opening formed in the second sidewall element by the second end portion. The tubes are preferably formed in straight lines.

The heat transfer unit preferably also includes a connection assembly having an inlet and an outlet for the first fluid, wherein the connection assembly is tightly and fluidly connected to the heat transfer unit.

According to one improvement of the invention, the at least one sidewall element is formed from a metal, in particular aluminum, and is tightly and liquid-tightly connected to the tubes of the heat exchanger by soldering.

The sidewall element is preferably formed as a sheet having a reinforcing curved portion and is formed by a deep drawing process or a hydroforming process. At this time, the sheet is understood as a flat rolling tool finished product made of metal. The hydroforming process, also referred to as high-pressure forming, is considered as a process of deforming the sheet using pressure in a closed forming tool, which is generated, for example, by a water-oil-emulsion in the tool.

The one or more housing elements are preferably formed from plastic or metal, especially aluminum.

In accordance with one preferred embodiment of the present invention, the heat transfer unit is also formed from flat tubes spaced apart from one another, each of which extends between two collectors. At this time, one or more sidewall elements are disposed between the collectors.

The heat transfer unit may preferably be perfused in one row or in multiple rows, especially in two rows, and may be scaled in dimensions such as length, width and / or height. In addition, the heat transfer unit is preferably disposed at least partially within the housing so as to transfer heat between fluids only in the area of the flat tube.

In another preferred embodiment of the present invention, elements are arranged in the intermediate space of adjacently disposed flat tubes to change the flow cross-section and / or to enlarge the heat transfer area, Metal, especially aluminum.

According to an improvement of the invention, the housing comprises two housing elements formed in a U-shape when viewed in cross section, the housing elements being aligned with respect to each other by the longitudinal edges of the legs, It is tightly and fluidly sealed.

According to another preferred embodiment of the present invention, the at least one housing element and at least one side wall element are connected to one another while sealing the housing. At this time, with the device assembled, the housing element coincides with the shape of the side edge of the side wall element when viewed in cross section, such that the side wall element is adjacent the side wall edge at one inner surface of the housing element.

On one inner surface of the housing element, a guide element is preferably formed for guiding the second fluid as intended. At this time, the guide elements are integrated in the housing element or disposed in the housing element. In the case of forming a plurality of, especially two, housing elements, a guide element can be preferably formed in the first housing element and / or in the second housing element.

According to another preferred embodiment of the present invention, the housing has a connection tube for guiding the second fluid. At this time, the fluid can be guided through the inlet to the inside of the housing and guided from the housing to the outside through the outlet. The connectors each protrude from both sides of the housing side wall. The guide element is used, for example, to prevent intermittent flow of fluid between the inlet and outlet.

According to one refinement of the invention, the connecting tubes of the inlet are formed in a closed state at the front aligned to the heat transfer, and uniformly distribute the fluid flow to one exterior surface in the region of the front aligned to the heat transfer Respectively.

The housing element is preferably formed as an integral element with a second fluid, in particular a connecting tube for the coolant. At this time, the housing element is preferably manufactured from plastics, preferably as an injection molded part, or made from metal, especially aluminum.

In another preferred embodiment of the present invention, the housing element is formed as an integral element, in particular from plastic, together with a connecting tube and a guide element for the second fluid.

According to an improvement of the present invention, a housing having at least one housing element with a heat exchanger and a connection tube having at least one sidewall element has an alignment of the second fluid connection tubes with respect to the inlet and outlet of the first fluid, Is formed symmetrically so that it can be changed by the rotation of the heat exchanger relative to the housing element.

The alignment of the second fluid connection tubes with respect to the inlet and outlet of the first fluid is preferably changed by 180 degrees by rotation of the heat transfer element relative to the housing element.

A heat transfer device, which may preferably operate in purely cross flow or in countercurrent form or in combination with cross flow and countercurrent flow, may be integrated into the refrigerant circulation system according to one embodiment of the present invention, The transmitter is used to cool or heat the fluid in the cooling circulation system or the heating circulation system. At this time, the heat transfer unit can be used in different applications as a condenser, gas cooler or evaporator, for example as a refrigerant-provided charge air cooler, as an oil cooler or to cool electronic components. At this time, other media as a refrigerant and water, or a water-glycol-mixture such as oil or waste gas may also be used.

The problem is also solved by a method according to the invention for manufacturing a heat transfer device having the above-mentioned characteristics, in particular for transferring heat between the first fluid and the second fluid.

The soldering of the tubes of the heat transfer tubes and the one or more sidewall elements, which are arranged to pass through the through openings of the one or more sidewall elements, consists of one manufacturing process according to the inventive concept.

In one preferred embodiment of a heat exchanger consisting of a plurality of tubes extending between two collectors and a connection assembly formed from a plurality of discrete elements, the soldering of all the individual components takes place in one manufacturing process.

Also, provided that the intermediate space formed between the tubes of the heat exchanger is provided with elements made of metal, in particular aluminum, for changing the flow cross-section and / or for enlarging the heat transfer area, Lt; RTI ID = 0.0 > heat transfer < / RTI >

In summary, the heat transfer apparatus according to the present invention has the following various advantages:

- efficient transfer of heat between two fluids, in particular liquid refrigerant as coolant, and refrigerant,

Maximum heat output can be delivered if the size of the structure is minimal or if the space requirement is minimal, ie the ratio of deliverable heat output to the refitted volume is optimal, Reuse or further use of known components is possible,

In order to be particularly suitable for use in automobiles, and to be suitable for operation with carbon dioxide, not only at high pressures but also at low pressures, the use of flat tubes, in particular, fulfills the high level requirements for rupture pressure on the refrigerant side, The compressive strength is reached,

- have the minimum weight,

A housing shell which can be mounted in various ways to change the connection positions - in the case of using the same sub-elements, two or more different connection positions - by using the standard flat tube profile of the R744 gas cooler and the R744 evaporator The manufacturing cost is minimized, the material cost is minimized,

A structure having a thin film for heat transfer on the coolant side and a structure having no such thin film can be used,

Especially when a housing made of plastic is used, the corrosion resistance is high, and

- If the components and parts are formed from metal, in particular from aluminum, the individual components of the heat exchanger and parts of the housing can be connected by brazing within the oven in a single manufacturing process.

Other details, features and advantages of embodiments according to the present invention will be apparent from the following detailed description of embodiments with reference to the accompanying drawings. Explanation of drawings:
1 is an exploded view of a heat transfer device having a heat exchanger, a connection assembly and a housing as discrete components,
2 is a schematic diagram of a heat transfer device having a brazed heat exchanger, a soldered connection assembly and open housing elements, and
3 is a schematic view showing the heat transfer device in a fully mounted state.

1 is provided with a heat transfer device (1) having a heat transmitters (2), the connection assembly 3 and the housing 11 as separate components is shown in an exploded view.

The heat exchanger 2 formed as the extruded flat tube heat exchanger from the flat tube 9 is formed in a single row or a plurality of rows depending on the output requirements and is of a size, It is scalable in width. The heat exchanger 2 shown in Fig. 1 is formed in two rows. At this time, the use of a known evaporator or condenser / gas cooler for R744 is contemplated.

Flat tubes 9 arranged side-by-side and in parallel to two parallel rows with respect to one another are arranged with respect to one another within respective rows with wide sides so that between directly adjacent flat tubes 9 Flow paths for the fluids, in particular the coolant, are generated one by one. This flow path then extends between the flat tubes 9 of the first row and then between the flat tubes 9 of the second row or at the beginning of the second And between the flat tubes 9 of the row and then between the flat tubes 9 of the second row. The flat tubes 9 in the first row and the second row are arranged in the same plane with each other and extend between two collectors 8a and 8b, respectively. The inner volume of the flat tube 9 is connected to the inner volume of the collectors 8a, 8b.

Within the flow path and in the flat tube 9 disposed adjacent to it in the intermediate space, there is disposed a device 10 for changing the flow cross-section and / or for enlarging the heat transfer area.

As the element 10 for changing the flow cross-section and / or for enlarging the heat transfer area, a thin film which is known for the condenser or evaporator or a thin film which is optimized for transferring heat with water can be used. Alternatively, a rib may also be used. The device 10 is formed from a material that is highly thermally conductive, such as, for example, aluminum, or plastic or other materials of low density.

In the case of designing the size of the device based on the flow of coolant characterized by the sizeless Reynolds number, the device 10 can be used only to increase the flow rate only or to increase turbulent formation of the coolant .

The coolant is guided through the intermediate space between the flat tubes 9 and around the element 10 to change the flow cross-section of the flow path.

It is not necessary that the element 10 for changing the flow cross-section of the flow path formed between the flat tubes 9 be firmly connected to the flat tube 9, for example by soldering. However, in embodiments with a thin film for increasing the heat transfer area, a rigid and thermally conductive connection of the flat tube 9 and the element 10 may be provided to further increase the output of the heat exchanger 2 . If the shapes of the collectors 8a and 8b in which all the extruded flat tubes 9 or the flat tube profiles are soldered therein are appropriate, the spacing of the flat tubes 9 can be further reduced and minimized As a result, such an embodiment is formed without a thin film.

The element 10 may alternatively also be arranged purely as a vortex generator which is preferably made of the same material as the housing 11 surrounding the heat exchanger 2, From the same metal or from other suitable materials of low density.

The vortex generators are used only to improve the flow velocity or the turbulence formation of the coolant and thereby to improve the heat transfer on the coolant side in order to substantially change the flow cross-section or only to flow through the flow path between the flat tubes 9.

In the state in which the heat exchanger 2 is assembled, the side wall elements 14a and 14b are arranged on the front surface or the narrow side of the heat exchanger 2. In this case, the side on which the ends of the flat tube 9 of the heat exchanger 2 are directed can be regarded as the front side.

The side wall elements 14a and 14b are each formed as a deep drawing portion or a hydroforming portion having a reinforcing curved portion in the form of a substantially rectangular sheet made of metal, particularly aluminum. The reinforcement curvature can be used to withstand the coolant side pressure in the foreground, but also as the contact surface of the adjacent housing elements 12, 13, and can be formed in two directions starting from the sheet surface. In Fig. 1, the shape of the reinforcement curved portion is shown in only one direction. Alternatively, the side wall elements 14a, 14b may also be manufactured solely by perforation only.

The side wall elements 14a, 14b with the edge regions rounded have through openings 15 for receiving the flat tubes 9 of the heat exchanger 2. The through openings 15 coincide with the external dimensions of the flat tubes 9, for example by brazing to create fluid-tight connections between the individual flat tubes 9 and the side wall elements 14a, 14b. With the device 1 assembled, the sidewall elements 14a and 14b are disposed between the collectors 8a and 8b and the element 10. The side wall elements 14a and 14b are components of the housing 11 of the device 1. [

The connection assembly 3 formed from the individual components 4 is connected to the collector 8a of the heat exchanger 2 in addition to the connecting elements not shown in the drawing and has an inlet 6 for the refrigerant and an outlet 7 , In which the refrigerant flows in the flow direction (5) through the inlet (6) and the outlet (7). At this time, the connecting elements for the collector 8a make a mechanical and refrigerant side connection between the connecting assembly 3 and the heat exchanger 2. The refrigerant is guided from the inlet 6 to the collector 8a and from the collector 8a to the outlet 7 and is diverted to an angle of 90 ° each.

The inlet (6) and outlet (7) are connections of the refrigerant circulation system, for example the connection assembly (3) to the refrigerant line of the car air conditioning system.

At this time also an inlet 6 and an outlet 7 for the refrigerant are provided in opposite flow directions 5 respectively so that the refrigerant line is connected to the device 1 so that the inlet 6 and the outlet 7 are interchanged Or the flow direction 5 of the refrigerant can be aligned.

Before finally assembling the heat transfer device 1, the heat transfer device 2 is connected to the collectors 8a and 8b and the flat tube 9, the side wall elements 14a and 14b and the connection assembly 3, Which are particularly soldered. The soldering process preferably consists of one manufacturing process. Depending on the shape of the heat exchanger 2 for the element 10 to change the flow cross-section and / or to increase the heat transfer area, the elements 10 are also connected to the flat tube 9 in the same method step , Especially soldered.

Alternatively, the side wall elements 14a, 14b may also be soldered or glued to the flat tube 9 in a further manufacturing process. In particular, in one embodiment of the housing 11 made, for example, of plastic elements that are bonded together, the element 10 for changing the flow cross-section and / or for enlarging the heat transfer area may also be formed from plastic And can be inserted between the flat tubes 9 only when the device 1 is assembled.

Thus, in order to reduce the risk of leakage of the coolant in the area where the flat tube 9 perfused by the refrigerant passes through the wall of the housing 11, the side wall elements 14a, 14b are used as components of the housing 11, As a cover, is connected in fluid sealing manner with the heat exchanger 2, that is to say with the flat tube 9.

The housing 11 surrounding the heat exchanger 2 in the region of the flat tube 9 is utilized to guide the coolant through the intermediate space and flow path formed substantially between the flat tubes 9 do. At this time, the collectors 8a and 8b are not circulated by the coolant, so that heat is not transferred between the coolant and the coolant through the walls of the collectors 8a and 8b.

The housing 11 includes two housing elements 12 and 13 and one guide element 20 in addition to the side wall elements 14a and 14b connected in a fluid sealing manner to the flat tube 9. [ The housing elements 12 and 13 are formed as an upper shell 12 and a lower shell 13 wherein the upper shell 12 has two circular through openings for the connecting tubes 16 and 17 of the coolant circulation system Respectively. Alternatively, the upper shell 12 may be formed as an integral element with the coupling tubes 16,17.

The housing elements 12, 13 are formed in a U-shape when viewed in cross section, and this shape coincides with the shape of the side edges of the side wall elements 14a, 14b in the assembled state of the device 1 . The heat exchanger 2 is provided with housing elements 12 and 13 so that the coolant flowing into the device 1 through the inlet 16 is evenly distributed from above onto the intermediate space formed by the flat tube 9. [ And flows into the gap formed between the heat exchanger 2 and the lower shell 13 in the flow direction 18 and flows into and out of the gap 90 Deg. Subsequently, the coolant is guided to the outlet 17 through an intermediate space formed by the flat tube 9 in a direction opposite to the flow behind the inlet 16.

At this time an inlet 16 and an outlet 17 for the coolant are provided in opposite flow directions 18 respectively so that the coolant line of the coolant circulation system is connected to the device 1 so that the inlet 16 and the outlet 17 are interchanged. Or the flow direction 18 of the coolant may be aligned.

In order to prevent intermittent flow of coolant from the inlet 16 to the outlet 17 and to guide the coolant into the intermediate space formed by the flat tube 9 as intended, The gap formed between the shells 12 is closed by the guide element 20. The guide element 20 is disposed in a fluid sealing manner relative to the upper shell 12 in a parallel plane of the U-shaped cross-section of the upper shell 12 and seals the upper shell 12 towards the heat exchanger 2 . The fixed features formed in the guide element 20 coincide with the openings formed in the upper shell 12 and in this case the fixed features are formed by the openings of the upper shell 12 in the assembled state of the housing 11 and the device 1 Lt; / RTI >

The connecting tubes 16,17 for the coolant have a constant circular cross-section in the flow direction 18 in a plane aligned perpendicular to the flow direction 18. [

The volume of the hollow cylinder shape of the connection pipe (16) is connected to the front surface aligned to the heat exchanger (2). The inlet 16 has multiple defined openings 19 in this region. The openings 19 formed in the outer surface of the connecting tube 16 enable uniform distribution and distribution of the coolant over the element 10 to change the flow cross-section and into the intermediate space of the flat tube 9. The openings 19 preferably distributed uniformly over the outer surface of the connecting tube 16 are formed in one cavity plane which is aligned perpendicular to the flow direction 18, , Elliptical, angular, or slot-shaped.

After the coolant has flowed in the flow direction 18 through the inlet 16 and the coolant has been distributed to the provided heat exchanger 2, the coolant is redirected by 90 degrees to form a flat tube 9 ) Of the flat tube 9 in the first flow path and through the intermediate space formed between the flat tubes 9 in the direction perpendicular to the flat tube 9 and before being again exhausted through the outlet 17, Through the intermediate space formed between the flat tubes 9 and then through the gap formed between the heat exchanger 2 and the lower shell 13, And flows parallel to the flat tube 9. Thereby, the coolant substantially passes through the device 1 in a cross flow with respect to the coolant. The device 1 is preferably operated as a cross-reflux-heat exchanger, especially when it is used as a gas cooler.

2 shows a heat exchanger 2 soldered from a flat tube 9 and collectors 8a and 8b and a heat exchanger 2 consisting of discrete components 4 and a soldered connection assembly 3, An exploded view of a heat transfer device 1 having open housing elements 12 and 13 with side wall elements 14a and 14b connected to a heat exchanger 2 and connection tubes 16 and 17. In Fig. 3 , the heat transfer device 1 is shown in a fully assembled state with the closed housing 11.

The sidewall elements 14a and 14b arranged on the sides facing each other of the collectors 8a and 8b are firmly connected to the heat exchanger 2 and particularly to the flat tube 9 as constituent parts of the housing 11. [ At this time, the side wall elements 14a and 14b are soldered, adhered or welded to the heat exchanger 2. [ As a result of the fixed connection being regarded as a technically sealed zero-leakage coupling, no sealing sites need to be formed between the side wall elements 14a, 14b and the heat exchanger 2. As a result, the process of complicating the housing 11 with respect to the flat tube 9 is avoided. The side wall elements 14a and 14b are arranged in the heat exchanger 2 on the narrow side of the flat tube 9, vertically aligned with respect to the flat tube 9.

The side wall elements 14a, 14b of the housing 11 are preferably made of aluminum and are fluid-tightly connected to the heat exchanger 2 by soldering.

This allows soldering of the individual components, namely the heat exchanger 2, the connecting assembly 4 and the side wall elements 14a, 14b, without the additional sealing element, And the desired sealing of the refrigerant line to the heat exchanger (2). Soldering the flat tube 9 as a penetration through the side wall elements 14a and 14b as the housing wall by the coolant sealing method prevents the coolant from leaking from the device 1 to the periphery.

In the assembled state, the housing elements 12, 13 and the side wall elements 14a, 14b, which completely surround the volume, can be simply inserted and connected to each other.

The housing elements 12, 13 are connected to each other as U-shaped shells at the longitudinal edges of the legs and are soldered, welded or glued together according to embodiments made from metal, especially aluminum or plastic. At this time, the upper shell 12 is formed in the region of the vertical edge with the extension, so that the extended area ends with one edge each and goes from the edge to the leg.

When the housing 11 is assembled, the extended area of the upper shell 12 is moved over the longitudinal edge of the lower shell 13, so that the longitudinal edge of the lower shell 13 is transferred from the upper shell 12, and the expanded area of the upper shell 12 surrounds the longitudinal edge of the lower shell 13. [0035] The upper shell 12 and the lower shell 13 are connected to each other at the longitudinal edge, at the edge of the extended area and at the outer surface of the lower shell 13 and at the inner surface of the upper shell 12, respectively, do.

Particularly, the shape of the outer surface of the side wall elements 14a and 14b in a state where the housing elements 12 and 13 are coupled to each other is such that the inner surfaces of the housing elements 12 and 13 are sealed to the side wall elements 14a and 14b And coincides with the inner surface of the housing elements 12 and 13 on the narrow side.

The sidewall elements 14a and 14b sealingly contact the inner surfaces of the housing elements 12 and 13 in the assembled state of the device 1 while deforming the side edges of the side wall elements 14a and 14b for reinforcement, The supporting surface of the edges of the edge is also enlarged. Depending on the embodiment of the side wall elements 14a, 14b and the housing elements 12, 13 formed, for example, of metal, especially aluminum or plastic, the interconnecting components are soldered, welded or bonded together.

Inside the housing 11, that is to say within the volume enclosed by the housing 11, a flat tube 9 and, in some cases, a device 10 are arranged. The housing 11 hermetically seals the heat exchanger 2 hermetically to the periphery. During operation of the device (1), the refrigerant flows inside the heat exchanger (2). The refrigerant flows in the flow direction (5) through the inlet (6) and into the heat exchanger (2) and is discharged through the outlet (7). The heat exchanger 2 is also circulated by a liquid-state fluid, in particular by a coolant such as, for example, water or a water-glycol-mixture. The coolant therefore flows through the device 1 in the intermediate space at the outer surface of the heat exchanger 2 and in the flow direction 18 between the heat exchanger 2 and the inner surface of the housing 11.

Depending on the shape of the housing 11, the coolant is guided along the outer surface of the heat exchanger 2 as intended. The housing (11) defines the flow of coolant around the heat exchanger (2) in the flow direction (18). At this time, the housing 11 is guided around the element 10 to change the flow cross-section of the flow path and through the intermediate space between the flat tubes 9.

The housing 11 has two connection tubes 16 and 17 for the inflow and outflow of coolant, which are disposed in the upper shell 12. [ The connectors 16 and 17 can be positioned at any location of the upper shell 12. [ The coolant flows into the apparatus 1 through the inlet 16 and is discharged again from the apparatus 1 through the outlet 17.

The upper shell 12 can be formed as an integral element, preferably as an injection-molded part from which the connection tubes 16 and 17 are integrated. The upper shell 12 and the connecting tubes 16 and 17 are integrally formed so that the risk of leakage of the coolant to the surroundings is increased and the use of additional sealing members which cause additional costs in the manufacture and management of the device 1 Is avoided.

The heat exchanger 2 is formed symmetrically with the side wall elements 14a and 14b so that the heat exchanger 2 is moved 180 degrees with respect to the housing elements 12 and 13 together with the connecting assembly 3. [ The various positions of the connecting pipes 16 and 17 can be made to the inlet 6 and the outlet 7 of the refrigerant without changing the components of the housing 11. [ Therefore, the connecting tubes 16 and 17 and the inlet 6 and outlet 7 of the refrigerant can be arranged differently by merely changing the assembly state with respect to each other using the same components, Enables a flexible configuration of the device 1 and a different embodiment of the device 1 with it, while at the same time reducing the cost.

The coolant is preferably guided in a countercurrent fashion with respect to the flow direction 5 of the coolant, but may alternatively be guided through the housing 11 only in a countercurrent state with respect to the coolant.

At this time, the refrigerant flows into the heat exchanger 2 in the refrigerant flow direction 5 through the inlet 6 of the connection assembly 4 and flows into the first row of flat tubes 9 ). The refrigerant then flows into the second collector 8b through the extruded flat tube 9 and is collected and distributed to the flat tube 9 in the second row and is discharged through the flat tube 9 to the first collector 8b, (8a), and is discharged from the heat exchanger (2) through the outlet (7) of the connection assembly (3).

1: Device
2: Heat transfer
3: connection assembly
4: individual components of the connection assembly 3
5: direction of refrigerant flow
6: Refrigerant inlet
7: Refrigerant outlet
8a, 8b: Collector
9: Flat tube
10: Device
11: Housing
12: housing element, upper shell
13: housing element, lower shell
14a, 14b: side wall element
15: through opening
16: connector, refrigerant inlet
17: Connector, refrigerant outlet
18: direction of refrigerant flow
19: opening
20: Guide element

Claims (10)

And a heat exchanger (2), said heat exchanger being formed from tubes for guiding a first fluid and being at least partially disposed in a volume completely enclosed by the enclosed housing (11), said second fluid A housing 11 for guiding is formed in several parts around tubes consisting of one or more housing elements 12 and 13 and one or more side wall elements 14a and 14b, A heat transfer device (1)
The one or more side wall elements (14a, 14b) having through openings (15) are formed tightly and fluidly connected to the heat exchanger (2) and the through openings (15) Coincides with the external shape of the tubes of the heat exchanger (2), the tubes are arranged through the through openings (15)
The heat exchanger 2 is formed from flat tubes 9 spaced apart from one another and each of the flat tubes 9 extends between two collectors 8a and 8b, Said one or more side wall elements (14a, 14b) being disposed between said collectors (8a, 8b)
Wherein the collector is configured to be independent of the second fluid circulation such that heat is not transferred between the first fluid and the second fluid through the walls of the collector,
(20) for guiding a flow direction of the second fluid in an area between the inlet and the outlet is formed in the housing A plurality of light emitting elements arranged on an inner surface of one of the elements,
Characterized in that the inlet (16) comprises a plurality of openings (19) dispersedly disposed along its outer circumference and the openings (19) are arranged perpendicular to the flow direction (18) One). The method according to claim 1,
The two sidewall elements 14a and 14b having the through openings 15 are formed tightly and fluidly connected to the heat exchanger 2 and the through openings 15 are in the form of Coincides with the external shape of the tubes of the heat exchanger 2 and each tube is arranged to penetrate through openings 15 formed in the first sidewall element 14a by the first end respectively, Is arranged to pass through the through-hole (15) formed in the second side wall element (14b) by the second side wall element (14b). 3. The method according to claim 1 or 2,
Characterized in that the one or more side wall elements (14a, 14b) are formed from metal and are tightly and liquid-tightly connected to the tubes of the heat exchanger (2) by soldering. delete 3. The method according to claim 1 or 2,
The housing 11 has a U-shaped housing element 12, 13 as viewed in transverse section, the housing elements being aligned with respect to each other by the longitudinal edges of the legs, And is connected in fluid sealing manner. 3. The method according to claim 1 or 2,
The one or more housing elements 12 and 13 and the one or more side wall elements 14a and 14b are connected to one another while sealing the housing 11 and the housing elements 12 and 13 have a cross- The sidewall elements 14a and 14b coincide with the shape of one lateral edge of the sidewall elements 14a and 14b in the assembled state of the delivery device 1 and the sidewall elements 14a and 14b coincide with the inner edges of the housing elements 12 and 13 (1), wherein said side edge is in contact with said edge. delete delete The method according to claim 1,
Characterized in that the housing element (12) is formed as an integral element with the inlet and outlet (16, 17). delete
KR1020150128056A 2014-10-16 2015-09-10 Device for heat transfer KR101890199B1 (en)

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DE102014115030.9 2014-10-16
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DE102015111398.8A DE102015111398A1 (en) 2014-10-16 2015-07-14 Device for heat transfer

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CN111256389B (en) * 2018-11-30 2023-03-28 浙江三花汽车零部件有限公司 Heat exchanger
WO2020108513A1 (en) 2018-11-30 2020-06-04 浙江三花汽车零部件有限公司 Heat exchange device
CN111256392B (en) * 2018-11-30 2023-03-28 浙江三花汽车零部件有限公司 Heat exchanger

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007051576A (en) 2005-08-17 2007-03-01 Tokyo Roki Co Ltd Egr cooler
EP2402694A1 (en) 2010-06-30 2012-01-04 Valeo Systemes Thermiques Condenser, in particular for a car air-conditioning system and heat exchanger equipped with such a condenser
KR101449386B1 (en) * 2014-06-25 2014-10-13 강영조 Marine Engine Cooling for heat exchanger

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007051576A (en) 2005-08-17 2007-03-01 Tokyo Roki Co Ltd Egr cooler
EP2402694A1 (en) 2010-06-30 2012-01-04 Valeo Systemes Thermiques Condenser, in particular for a car air-conditioning system and heat exchanger equipped with such a condenser
KR101449386B1 (en) * 2014-06-25 2014-10-13 강영조 Marine Engine Cooling for heat exchanger

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