Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
  • F28F1/00—Tubular elements; Assemblies of tubular elements
  • F28F1/02—Tubular elements of cross-section which is non-circular
  • F28F1/022—Tubular elements of cross-section which is non-circular with multiple channels
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28B—STEAM OR VAPOUR CONDENSERS
  • F28B1/00—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser
  • F28B1/06—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser using air or other gas as the cooling medium
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
  • F28F1/00—Tubular elements; Assemblies of tubular elements
  • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
  • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
  • F28F1/24—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
  • F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
  • F28F19/02—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using coatings, e.g. vitreous or enamel coatings
• • 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
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
  • F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
  • F28F27/02—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus for controlling the distribution of heat-exchange media between different channels
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
  • F28G15/00—Details

Definitions

• the invention relates to a heat exchange system according to the preamble of independent claim 1.
• Heat exchangers are used in refrigerators, e.g. used in ordinary household refrigerators, in air conditioners for buildings or in vehicles of all kinds, especially in automobiles, aircraft and ships, as water or oil coolers in internal combustion engines, as condensers or evaporators in coolant circuits and in a myriad of different applications, all of which are well known to those skilled in the art are.
• the laminated heat exchangers serve, like all types of heat exchangers, to transfer heat between two media, for example, but not only, to transfer from a cooling medium to air or vice versa, as is known, for example, from a classic household refrigerator in which heat is released to the ambient air via the heat exchanger for generating a cooling capacity in the interior of the refrigerator.
• the ambient medium outside the heat exchanger e.g. Water, oil or often simply the ambient air, which absorbs heat or transfers heat to the heat exchanger, for example, is either cooled or heated accordingly.
• the second medium may e.g. be a liquid refrigerant or heat transfer or a vaporizing or condensing refrigerant.
• the surrounding medium e.g. the air
• the coolant that circulates in the heat exchanger system. This is compensated by greatly different heat transfer surfaces for the two media:
• the medium with the high heat transfer coefficient flows in the tube, which on the outside by thin sheets (ribs, fins) has a greatly enlarged surface at which the heat transfer, for. takes place with the air.
• Fig. 4 shows a simple example of an element of such a known laminated heat exchanger. In practice, the
• Heat exchanger thereby formed by a plurality of such elements according to FIG. 4.
• the lamellar spacing is chosen differently for different applications. However, purely thermodynamically, it should be as small as possible, but not so small that the air-side pressure loss is too large. An economic optimum is about 2 mm, which is a typical value for condenser and recooler.
• the efficiency is essentially determined by the fact that the heat that is transferred between the fin surface and the air, must be transmitted through heat conduction through the fins to the pipe. This heat transfer is more effective, the higher the conductivity or the thickness of the lamella, but also the smaller the distance between the
• Pipes is. This is called the lamella efficiency. As a lamellar material is therefore nowadays predominantly aluminum used, which has a high thermal conductivity (about 220 W / mK) to economic conditions. The pipe pitch should be as small as possible, but this leads to the problem that you need many pipes. Many pipes mean high costs because the pipes (usually made of copper) are considerably more expensive than the thin aluminum fins. This material could be reduced by reducing the pipe diameter and the wall thickness, ie you build a heat exchanger with many small pipes instead of few big pipes. Thermodynamically, this solution would be optimal: very many tubes in close proximity with small diameters. However, a significant cost factor is also the working time for expanding and soldering the pipes. This would increase extremely with such a geometry.
• minichannel or microchannel heat exchangers have been developed, which are manufactured by a completely different process and almost correspond to the ideal of a laminated heat exchanger: many small tubes with small spacings.
• Such profiles can e.g. be made easily and in a variety of forms from a variety of materials in suitable extrusion.
• other methods of making minichannel heat exchangers are known, such as e.g. the assembly of suitably shaped profile sheets or other suitable methods.
• mini-channel heat exchangers In mobile use, mini-channel heat exchangers have established themselves during the 1990s. The low weight, the small block depth and the limited dimensions that are required here are the ideal conditions for this. Car coolers and condensers and evaporators for car air conditioning systems are today almost exclusively realized with mini-channel heat exchangers.
• Air-applied heat exchangers such as e.g. Condensers or recoolers often work in contaminated environments.
• the pollution of the air may be natural (pollen, insects, etc.) or industrial (grinding dust, tire wear, flour dust, cardboard dust, etc.). Many impurities stick to the air-cooled heat exchanger and over time increase it.
• the heat exchangers where, for example, the cooling air is guided past with the aid of appropriate fan can be contaminated by such and other contaminants of all kinds that are contained in the cooling air with time more and more, which may for example lead to the heat transfer coefficient of the surface of the heat exchanger is lowered, so that the heat transfer performance is significantly reduced.
• This can lead to increased operating costs or in extreme cases, the heat exchange system can no longer provide the required heat exchange performance, which can lead to serious damage in the worst case.
• the consequence of the contamination is thus very frequent, that the air-side resistance increases and thereby the air volume flow is reduced and also the heat transfer is reduced.
• the effects described above cause the energy consumption of a refrigeration system to increase with increasing contamination, up to a standstill.
• a connected machine to be cooled such as a data processing system or an internal combustion engine or other machine may overheat and be damaged. But even damage to goods, such as food that is stored in a cold store, can spoil, for example, in the absence of cooling.
• the heat exchanger In order to prevent such serious damage and to counteract such contamination, the heat exchanger must be either regularly cleaned consuming or provided with an appropriate filter. However, the filters must be cleaned regularly. Above all, the associated cooling machines must be turned off for the purpose of cleaning the heat exchanger in the rule, or the heat transfer performance of the heat exchanger is very strongly adversely affected during the cleaning process.
• the object of the invention is therefore to provide an improved heat exchange system, which overcomes the problems known from the prior art, which in particular is easy to clean, preferably also in the operating state can be cleaned, with a heat transfer performance of the heat exchanger or the entire
• Heat exchange system does not decrease substantially even over a longer period of operation, but also over long periods of operation, a substantially constant, predetermined heat transfer performance is guaranteed.
• the invention thus relates to a heat exchange system comprising a heat exchanger comprising an inflow surface and an outflow surface, wherein for exchanging heat between a transport fluid and a heat medium flowing through the heat exchanger in the operating state, the transport fluid can be fed to the heat exchanger via an inflow surface of the heat exchange system and the inflow surface with the heat exchanger can be brought into flowing contact and on the outflow of the heat exchanger again weg21bar.
• the heat exchange system for removing contaminants comprises an automatic cleaning system.
• the present invention is in particular an automatic cleaning system in such a way that in a preferred embodiment, either a mounted in front of the heat exchanger filter (eg a fly screen), or the heat exchanger itself is automatically cleaned.
• a mounted in front of the heat exchanger filter eg a fly screen
• the heat exchanger itself is automatically cleaned.
• This can, as will be explained in more detail later with reference to specific embodiments, for example, take place in that the filter is rolled over a type scraper, or the filter or the heat exchanger itself is automatically cleaned by a type scraper, or that the filter surrounds the heat exchanger itself at least partially and, for example, permanently rotates. This ensures that the dirt received by the filter on the suction side of the heat exchanger on the opposite side of the heat exchanger is directly entrained again by the air flow, whereby the filter is automatically cleaned.
• the heat exchanger can also be accommodated in a housing of the heat exchange system, wherein the automatic cleaning system is then provided alternatively or additionally to an inflow surface of the housing of the heat exchange system.
• Essential to the invention is thus that an automatic cleaning system is provided which allows to clean the heat exchanger or a dirt filter on the heat exchanger, or an inflow of the heat exchange system or a dirt filter on the inflow surface of the heat exchange system in the operating state, in particular a heat transfer performance of the heat exchanger does not substantially decrease even over a longer period of operation, but also ensures a substantially constant, predetermined heat transfer performance over long periods of operation.
• the invention can be used advantageously because the heat exchange system for cleaning not disassembled or disassembled or for cleaning with the inventive automatic cleaning system must be opened, making cleaning much easier and thus more efficient and cheaper than in the previously known heat exchange systems. In particular, but not only, because at least less staff for cleaning must be available.
• the cleaning system of the present invention comprises a dust trap and / or a dirt filter, wherein for automatic cleaning of the heat exchange system, ie for example for automatic cleaning of the dust trap or the dirt filter a dirt wiper and / or a dishwashing machine is provided according to the invention be operated automatically, as will be explained in more detail below.
• a dirt filter is provided on the inflow of the heat exchanger and / or on the inflow of the heat exchange system and / or on the outflow of the heat exchanger, with which contaminants of all kinds, such as dust soot, insects, etc. from the sucked Transportfluidum, ie for Example from the air, which is passed over the heat exchanger for heat exchange, can be filtered out.
• a deflection device in particular a deflection roller provided, wherein the dirt filter spans the inflow and outflow of the heat exchanger such that a suction of the dirt filter from the inflow over the deflection before the outflow is feasible.
• the dirt filter for example, permanently circulate around the heat exchanger, which is achieved by the dirt collected on the suction side of the inflow from the dirt filter dirt on the opposite outflow of the heat exchanger entrained again by the effluent through the outflow air and discharged therefrom becomes.
• the heat exchange system may in particular also be formed from a plurality of heat exchange modules, in particular by identical heat exchange modules.
• the heat transfer performance and / or the heat transfer power density can be easily and efficiently adjusted by a modular heat exchange system of the present invention by repeating preferably identical heat exchange modules or by removing identical heat exchange modules from the heat exchange system.
• a cooling device for cooling the heat exchanger in particular a fan for generating a gas flow, can be provided in a manner known per se.
• the heat exchanger itself as known from the prior art, by a plurality of microchannels as a microchannel heat exchanger and / or the heat exchanger may also be formed as a laminated heat exchanger with cooling fins.
• the heat exchange system is formed as a combination heat exchange system of the laminated heat exchanger and the microchannel heat exchanger, if specific requirements prefer such a design.
• the components of the inventive heat exchange system so for example the heat exchanger and / or a supply and / or discharge for the heating means and / or a possibly existing cleaning flap for cleaning the interior of the heat exchange system and / or any other component of a heat exchange system according to the invention with each other Component of the heat exchange system may be connected by a universal connector, so that, for example, a heat exchange module can be added or removed particularly easily.
• a heat exchange module can be added or removed particularly easily.
• the cleaning door and the manifolds for the heating means or blues and other modules and components of the heat exchange system are connected to a universal connector.
• these universal connecting elements are particularly well suited both for the vertical and for the horizontal installation of the heat exchange systems or the heat exchange modules.
• a drive unit for the control and / or regulation of the heat exchange system in the operating state is usually, but not necessarily, a drive unit, in particular a drive unit with a data processing system for controlling the cooling device and / or the cleaning system and / or Heilabschottung and / or an operating or state parameter the heat medium and / or another operating parameter of the heat exchange system, as is known per se from the prior art in existing heat exchange systems to those skilled in the art.
• the heat exchange system or the heat exchange module and / or the heat exchanger and / or a boundary surface of the heat exchange module, in particular the entire heat exchange system is particularly advantageously made of a metal and / or a metal alloy, in particular a single metal or a single metal alloy, and may in particular be made of stainless steel, in particular of aluminum or an aluminum alloy, wherein a sacrificial metal is preferably provided as corrosion protection, and / or wherein the heat exchange system at least partially with a protective layer, is provided in particular with a corrosion protection layer.
• the distribution and collecting pipes are preferably made of high-strength materials such as stainless steel for high pressures, for example for operation with CO2.
• a heat exchange system is a radiator, in particular a radiator for a vehicle, in particular for a land vehicle, for an aircraft or for a watercraft, or a radiator, a condenser or an evaporator for a mobile or stationary heating system, cooling system or air conditioning in particular a cooler device for a machine, a data processing system or for a building or for another device which is to be operated with a heat exchange system.
• Fig. 1 shows a first embodiment of an inventive
• Fig. 2 shows a second embodiment with dirt filter
• Fig. 5 shows a further embodiment according to FIG. 2 with
• FIG. 1 shows a schematic representation of a first exemplary embodiment of a heat exchange system according to the invention with a wiper, which is provided below with the reference numeral 100 in its entirety.
• the heat exchange system 100 is shown in Fig. 1 during a cleaning operation in the operating state of the heat exchange system 100.
• the inventive heat exchange system 100 of FIG. 1 is a modular heat exchange system 100 and comprises as an essential element a heat exchange module 1000 with a heat exchanger 1 for exchanging heat between a heating means 5, e.g. a cooling liquid 5 or an evaporating agent 5 and a transporting fluid 4, e.g. 4.
• the heat exchanger 1 is in the present case a per se known microchannel heat exchanger 101 with a plurality of microchannels 9.
• the heat exchanger 101 is with its microchannels 9 via a not shown in FIG. 1 connection system, which is known in the art in principle, for the exchange of heating means 5 connected to a chiller, also not shown.
• the chiller is flow-connected to the connection system, comprising an inlet channel with an inlet segment of the heat exchanger 101 and an outlet channel with an outlet segment of the heat exchanger 101 such that the heat means 5 exchange heat with the air 4 from the inlet channel via the inlet segment , is fed to the outlet channel through the plurality of microchannels 9 of the heat exchanger 1, and finally via the outlet segment.
• An outer boundary of the heat exchange module 1000 or the heat exchange system 100 is in this case by an inflow surface 2 of the heat exchanger 1, which in the present case is identical to the inflow surface 200 of the heat exchange system 1, and an outflow surface 300 of auschsystenns 1 formed such that in the operating state for exchanging heat between the Transportfluidum 4, the flow direction is symbolically represented by the arrows 40, and the heat exchanger 1 flowing through the heat medium 5, the Transportfluidum 4 via the inflow 2 to the heat exchange module 1000 fed with the Heat exchanger 1 can be brought into flowing contact and discharged via the outflow surface 300 from the heat exchange module 1000 or from the heat exchange system 1 again.
• a cooling device 11 in the present case a fan 11 is provided, with which an amount of air 4, which is transported per unit time through the heat exchange module 1000, is controllable ,
• a cleaning system 7, 71 in the form of a dirt wiper 71 is furthermore provided as the central element.
• the dirt wiper 71 is automatically, during operation of the heat exchange system 100, preferably permanently reciprocated alternately in a direction of the double arrow P on the dirt filter 8, so that impurities 6 by the suction of the air 4 through the dirt filter 8 on this in Operating state are deposited, permanently removed, whereby the heat exchanger 1 provides a substantially constant heat transfer performance over a long period of operation, because no dirt can permanently attach to the heat exchanger 1 and on the dirt filter 8.
• FIG. 2 shows a second exemplary embodiment of a heat exchange system 100 according to the invention with a dirt filter 8 and a deflection device 72 for the dirt filter 8.
• the heat exchange system of FIG. 2 thus differs from that of FIG. 1 in that a dirt wiper 71 is not provided as the cleaning system 7, but that a deflection device 72 is provided in the form of a deflection roller 721, wherein the dirt filter 8 the inflow surface 2 and the Outflow surface 3 of the heat exchanger 1, 101, 102 spans such that a suction side 21 of the dirt filter 8 is feasible from the inflow 2 via the deflecting device 72 in front of the outflow surface 3.
• the dirt filter 8 for example, permanently circulate around the heat exchanger 1, whereby it is achieved that the on the suction side 21 at the inflow 2 and at the inflow 200 from the dirt filter 8 recorded dirt 6 at the opposite outflow surface 3 of the heat exchanger 1 is carried along again by the air flowing out through the outflow 3 3 air and discharged from this outwards.
• a heat exchanger 1, 101 according to FIG. 1 with micro channels 9 is shown schematically in section.
• microchannel heat exchangers 101 which are often referred to as Minichannelebenleyer 101, eg aluminum extruded profiles used, the very many small channels 9 with a Diameter of eg about 1 mm.
• the heat exchanger 1, 101 of FIG. 3 can be made, for example, in a suitable extrusion method, simply and in a variety of forms from a variety of materials. In this case, the heat exchanger 1 according to FIG. 3 can be produced in another embodiment variant, not explicitly shown in FIG.
• FIG. 4 shows, in contrast to FIG. 3, an element of a known laminated heat exchanger 1, 102 with cooling fins 10, as could also be used instead of a microchannel heat exchanger 101 in one embodiment of the present invention.
• the heating means 5 flows through the tubular element of the laminated heat exchanger 102, which exchanges heat in the operating state mainly via the cooling fins 10 with the air 4 flowing past it. It is understood that in practice the heat exchanger 1 is usually formed from a plurality of elements according to FIG. 4.
• a combination heat exchanger 1, 101, 102 is used as the heat exchanger 1. That is, a heat exchange system 100 of the present invention, for very specific applications in addition to a heat exchanger 101 with a plurality of micro channels 9 simultaneously a laminated heat exchanger 102 with cooling fins 10 include.
• Fig. 5 is a further embodiment of FIG. 2 with an air seal 12 is shown schematically.
• the Luftabschottung 12 is preferably in the form of a blind or a Venetian blind comprising individual blind elements 121 and Storenimplantation 121 configured so that the degree of coverage of the heat exchanger 1 is variably, preferably electronically controlled and / or controlled variable, in which the Heilabschottung 12 in known manner, for example, completely or partially by pulling together the individual blind elements 121 and Storenimplantation 121 is removed from the surface of the heat exchanger 1, or by changing an angle between the individual Storenmaschinen 121 and the surface of the heat exchanger 1, so that the effective passage area for the air 4 is variable.
• This is done in a simple way, without the To adjust flow dynamics in the cooling system, a regulation of the heat exchange performance of the heat exchanger 1 possible.
• FIG. 6 Another exemplary embodiment of a heat exchange system 100 according to the invention is shown in a schematic representation in FIG. 6, in which the heat exchanger 1 is provided within a closed housing G of the heat exchange system 1.
• the dirt filter 8 is not provided directly on the heat exchanger 1, but on a housing wall of the heat exchange system 100, which forms the inflow surface 200. Accordingly, designed as a wiper 71 cleaning system 7 is provided except on the housing G on the dirt filter 8 in front of the inflow 200.
• a cleaning system e.g. According to FIG. 1, FIG. 2 or FIG. 5, it can be directly provided on the heat exchanger 1, so that an even better cleaning effect or even better protection against soiling of the heat exchanger 1 can be ensured for special requirements.

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• Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Thermal Sciences (AREA)
• Geometry (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
• Cleaning In General (AREA)
• Compression-Type Refrigeration Machines With Reversible Cycles (AREA)

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Applications Claiming Priority (5)

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• 2008
  • 2008-10-16 EP EP08862967A patent/EP2225528B1/fr not_active Not-in-force
  • 2008-10-16 CA CA2709639A patent/CA2709639A1/fr not_active Abandoned
  • 2008-10-16 AU AU2008337810A patent/AU2008337810A1/en not_active Abandoned
  • 2008-10-16 CN CN200880122528.9A patent/CN101903734B/zh not_active Expired - Fee Related
  • 2008-10-16 US US12/808,349 patent/US20100258275A1/en not_active Abandoned
  • 2008-10-16 BR BRPI0822050-6A patent/BRPI0822050A2/pt not_active IP Right Cessation
  • 2008-10-16 MX MX2010006030A patent/MX2010006030A/es not_active Application Discontinuation
  • 2008-10-16 WO PCT/EP2008/063994 patent/WO2009077227A1/fr active Application Filing
  • 2008-10-16 AT AT08862967T patent/ATE523748T1/de active
  • 2008-10-16 JP JP2010538510A patent/JP2011508865A/ja active Pending

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