EP1116002B1 - Single-circuit cooling system - Google Patents
Single-circuit cooling system Download PDFInfo
- Publication number
- EP1116002B1 EP1116002B1 EP99969485A EP99969485A EP1116002B1 EP 1116002 B1 EP1116002 B1 EP 1116002B1 EP 99969485 A EP99969485 A EP 99969485A EP 99969485 A EP99969485 A EP 99969485A EP 1116002 B1 EP1116002 B1 EP 1116002B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- evaporator
- refrigerant
- downstream
- circuit
- cooling
- 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.)
- Expired - Lifetime
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Classifications
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- 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
- F25B39/02—Evaporators
- F25B39/022—Evaporators with plate-like or laminated elements
- F25B39/024—Evaporators with plate-like or laminated elements with elements constructed in the shape of a hollow panel
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- 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
- F25B5/00—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity
- F25B5/04—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity arranged in series
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- 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
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/04—Refrigeration circuit bypassing means
- F25B2400/0415—Refrigeration circuit bypassing means for the receiver
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- 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
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/16—Receivers
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- 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
- F25B45/00—Arrangements for charging or discharging refrigerant
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- 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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
- F25D11/02—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures
- F25D11/022—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures with two or more evaporators
Definitions
- the invention relates to a single-circuit cooling system with an option based on Deflection means in its refrigerant circuit switchable reservoir for receiving Refrigerant and at least two evaporators, one of which is in the Series connection of downstream evaporators with regard to its temperature the refrigerant removal is controlled using the reservoir.
- a fresh cooling compartment and one Normal refrigerator compartment is on the pressure side of its compressor by a solenoid valve switchable collectors provided in the refrigerant circuit (see EP-A-0 703 421). This is used in Dependence of the position of a temperature controller arranged in the refrigerator compartment To withdraw different amounts of liquid refrigerant from the refrigeration circuit.
- liquid refrigerant is required, one of which is functionally very tight Tolerance limits prescribed refrigerant quantity when filling the Refrigeration cycle requires a very narrow so-called filling width, whereby the Filling process of the refrigeration circuit with regard to the filling quantity not only one precise monitoring, but also requires a very fine dosage. The consequence of this is that the filling process is time-consuming and costly.
- the invention has for its object a single-circuit cooling system according to the Preamble of claim 1 with simple constructive measures, especially with regard to the minimum and the maximum Refrigerant filling quantity certain filling width, to improve.
- the filling width of the filling evaporator system can be increased if after a preferred embodiment of the object of the invention is provided, that the collection means from a combination of at least one Refrigerant collector and one in terms of its capacity a single channel enlarged channel section are formed.
- the refrigerant collector and enlarged channel sections are arranged in series, wherein the refrigerant collector the enlarged channel section in the flow direction of the circulated refrigerant is downstream. Furthermore, the Storage of the refrigerant collector that the liquid refrigerant in upstream evaporator at least largely retained and one Transport of the liquid refrigerant by so-called "entraining" in the downstream evaporator is prevented.
- the refrigerant collector in the direction of flow forced refrigerant another, into one Refrigerant connection channel to the downstream evaporator, downstream channel section enlarged in terms of its volume is.
- Such a measure not only creates another buffer space, but also also particularly ensures that when operating the Refrigerant compressor the liquid refrigerant entrained significantly less is and thus an unwanted cooling of a certain period of time from the Cooling circuit hidden evaporator is ensured.
- the enlarged channel section of the Refrigerant connection channel at least in the initial area of the downstream evaporator extends.
- the evaporator Circuit board sections according to the roll bond or the Z bond process manufactured evaporator board are formed.
- a cooling device with evaporators is particularly useful if after a further preferred embodiment of the subject of the invention it is provided that the evaporators have a different cooling capacity, the downstream evaporator has a lower cooling capacity than Cooling compartment evaporator and the other is designed as a fresh cooling evaporator.
- the evaporator board three serving as evaporators Includes board sections, of which the leading in series as Freezer evaporator, the immediately following as a fresh cooling evaporator and the downstream of this is designed as a refrigerator compartment evaporator.
- fresh cooling compartment evaporator can not only the filling width of the evaporator system with liquid refrigerant at least on the increase double the value compared to conventional evaporator systems, but also make sure that the refrigerator compartment evaporator in the event that Reservoir for the absorption of liquid refrigerant within the refrigeration cycle is switched, not charged with liquid refrigerant and thus is not cooled as intended. At the same time, however, the amount of refrigerant suitable for maintaining the full cooling capacity on the freezer compartment evaporator.
- the only figure shows one integrated in a single-circuit cooling system Evaporator board with three evaporators, one of which is connected in series Evaporator arranged between the two evaporators Fresh cooler evaporator with collection agent for buffering refrigerant Is provided.
- a is a simplified schematic representation Single-circuit refrigeration system 10 shown, which has a compressor 11 and a condenser 12, at the output of which is used to hold liquid refrigerant serving reservoir 13 is provided, which via one of a not shown Control electronics controlled three / two-way solenoid valve 14 in the Refrigeration circuit is switchable.
- the solenoid valve 14 is on its output side Downstream dryer 15, which in turn is designed as a capillary tube Throttle 16 is downstream.
- the capillary tube 16 is in one piece Evaporator board 17 belonging to the board section 18, which in its Installation position is designed as a U-shaped angled freezer evaporator, in whose capillary tube 16 is stamped by a cover formed by one of its legs is and serves as an injection point 19.
- the as Single channel has the refrigerant channel 20 supplied to the circuit board section 22 within the board section 22 a with regard to the cross section of the Single channel with a significantly enlarged channel cross-section 23 on which a connected via a single channel section Refrigerant collector 24 is connected downstream, which together with the enlarged channel section 23 as a buffer for liquid refrigerant within the Board section 22 is used.
- a single channel section Refrigerant collector 24 is connected downstream, which together with the enlarged channel section 23 as a buffer for liquid refrigerant within the Board section 22 is used.
- the refrigerant collector 24 is on the output side also in cross section enlarged channel section 25 of Refrigerant channel 20 downstream, which at least to a certain extent its length is arranged within the connecting web 21 and which on its inflow side facing the refrigerant collector 24 as a double channel 26 trained channel part, which exclusively on the Connecting web 21 is provided.
- the double channel 26 is similar in one enlarged duct section 23 formed duct part 27 of duct section 25 merged, the channel part 27 over part of its length within of the connecting web 21 is arranged, while its predominant Longitudinal section within a the board section 22 refrigeration downstream, serving as a refrigerator compartment evaporator section 28 is provided is.
- the refrigerant channel 20 is in turn continued as a single channel and via the Connecting web 21 returned to the board section 18, where it in the Ceiling section opens at a suction point 29.
- the invention is also on individual evaporator boards applicable.
Abstract
Description
Die Erfindung betrifft ein Einkreiskältesystem mit einem wahlweise anhand von Umlenkmitteln in seinen Kältekreislauf schaltbaren Reservoir zur Aufnahme von Kältemittel und wenigstens zwei Verdampfern, von denen der in der Reihenschaltung nachgeordnete Verdampfer hinsichtlich seiner Temperatur durch den Kältemittelentzug anhand des Reservoirs gesteuert ist.The invention relates to a single-circuit cooling system with an option based on Deflection means in its refrigerant circuit switchable reservoir for receiving Refrigerant and at least two evaporators, one of which is in the Series connection of downstream evaporators with regard to its temperature the refrigerant removal is controlled using the reservoir.
Bei einem bekannten Mehrtemperaturenkühlschrank mit in einem Einkreiskältesystem liegenden Gefrierfach, einem Frischkühlfach und einem Normalkühlfach ist auf der Druckseite seines Verdichters ein durch ein Magnetventil in den Kältemittelkreislauf schaltbarer Sammler vorgesehen (siehe EP-A-0 703 421). Dieser dient dazu, in Abhängigkeit der Stellung eines im Kühtfach angeordneten Temperaturreglers dem Kältekreislauf unterschiedliche Mengen flüssigen Kältemittels zu entziehen. Befindet sich der Temperaturregler in seiner Reglerstellung "Warm" so ist dem Kältekreislauf gerade soviel Kältemittel entzogen, daß der am Ende der Reihenschaltung der Verdampfer liegende Normalkühlfachverdampfer nicht mehr mit flüssigem Kältemittel beaufschlagt ist, während der im Kältekreislauf unmittelbar vor ihm liegende Frischkühlfachverdampfer mit der zu seiner bestimmungsgemäßen Kühlung ausreichenden Menge flüssigen Kältemittels durchströmt ist. Um eine derartige gezielte Verarmung des Kühifachverdampfers an flüssigem Kältemittel herbeiführen zu können, ist eine eng tolerierte Füllmenge des Kältesystems mit flüssigem Kältemittel erforderlich, wobei eine funktionsbedingt in sehr engen Toleranzgrenzen vorgeschriebene Kältemittelmenge beim Befüllen des Kältekreislaufes eine sehr enge sogenannte Füllbreite bedingt, wodurch der Befüllvorgang des Kältekreislaufes hinsichtlich der Füllmenge nicht nur einer sehr genauen Überwachung, sondern auch einer sehr feinen Dosierung bedarf. Die Folge davon ist, daß der Befüllungsvorgang zeitaufwendig und kostenträchtig ist.In a known multi-temperature refrigerator with in one Single-circuit cooling system lying freezer compartment, a fresh cooling compartment and one Normal refrigerator compartment is on the pressure side of its compressor by a solenoid valve switchable collectors provided in the refrigerant circuit (see EP-A-0 703 421). This is used in Dependence of the position of a temperature controller arranged in the refrigerator compartment To withdraw different amounts of liquid refrigerant from the refrigeration circuit. is the temperature control is in its "warm" control position, so is the refrigeration cycle just enough refrigerant removed that at the end of the series connection of the Evaporator normal refrigeration compartment evaporator no longer with liquid Refrigerant is applied while in the refrigeration cycle immediately in front of it lying fresh cooler evaporator with its intended Cooling sufficient amount of liquid refrigerant is flowed through. To one such targeted depletion of the refrigerant evaporator on liquid refrigerant To be able to achieve this is a tightly tolerated filling quantity of the refrigeration system liquid refrigerant is required, one of which is functionally very tight Tolerance limits prescribed refrigerant quantity when filling the Refrigeration cycle requires a very narrow so-called filling width, whereby the Filling process of the refrigeration circuit with regard to the filling quantity not only one precise monitoring, but also requires a very fine dosage. The The consequence of this is that the filling process is time-consuming and costly.
Der Erfindung liegt die Aufgabe zugrunde, ein Einkreiskältesystem gemäß dem Oberbegriff des Anspruches 1 mit einfachen konstruktiven Maßnahmen, insbesondere hinsichtlich der durch die minimale und die maximale Kältemittelfüllmenge bestimmte Füllbreite, zu verbessern.The invention has for its object a single-circuit cooling system according to the Preamble of claim 1 with simple constructive measures, especially with regard to the minimum and the maximum Refrigerant filling quantity certain filling width, to improve.
Diese Aufgabe wird gemäß der Erfindung dadurch gelöst, daß der in Reihenschaltung vorgelagerte Verdampfer eine Kältemittelkanalanordnung aufweist, welche zumindest weitestgehend mit zum Puffern von flüssigem Kältemittel dienenden Sammelmitteln ausgestattet ist.This object is achieved according to the invention in that the in Series connection upstream evaporator a refrigerant channel arrangement has, which at least largely with the buffering of liquid Refrigerant-serving collection means is equipped.
Durch die Einbringung von Sammelmitteln in die Kältemittelkanalanordnung des vorgelagerten Verdampfers ist in diesem ein Stauraum für flüssiges Kältemittel geschaffen, wodurch sich das flüssige Kältemittel für den Fall, daß der nachgelagerte Verdampfer temperaturbedingt aus dem Kältekreislauf ausgekoppelt ist, in dem ersteren Verdampfer ablagern kann, so daß zumindest weitestgehend sichergestellt ist, daß der letztere Verdampfer nicht in ungewollter Weise mit flüssigem Kältemittel beaufschlagt ist. Durch diese Puffermaßnahme im vorgeschalteten Verdampfer sind die Füllgrenzen des Verdampfersystems mit flüssigem Kältemittel, nämlich die für die bestimmungsgemäße Kältefunktion erforderliche Mindestfüllmenge sowie die maximal mögliche Füllmenge deutlich weiter voneinander beabstandet, wodurch sich die Füllbreite des Kältegerätes wesentlich erhöht, so daß die Befüllung des Verdampfersystems im Fertigungsdurchlauf einer Kältegerätegroßserienfertigung in einem wesentlichen weiteren Toleranzfeld und somit in einer deutlich verkürzten Befüllungszeit erfolgen kann. By introducing collection agents into the refrigerant channel arrangement of the upstream evaporator is a storage space for liquid refrigerant created, whereby the liquid refrigerant in the event that the downstream evaporators are decoupled from the refrigeration cycle due to temperature is, can deposit in the former evaporator, so that at least largely it is ensured that the latter evaporator is not used in an undesired manner liquid refrigerant is applied. Through this buffer measure in Upstream evaporators are the filling limits of the evaporator system liquid refrigerant, namely that for the intended refrigeration function required minimum filling quantity and the maximum possible filling quantity clearly spaced further apart, which increases the filling width of the refrigerator significantly increased, so that the filling of the evaporator system in Production run of a large-scale refrigeration unit production in one essential wider tolerance range and thus take place in a significantly shorter filling time can.
Mit besonders einfachen, konstruktiven Mitteln kann die Füllbreite des zu befüllenden Verdampfersystems noch gesteigert werden, wenn nach einer bevorzugten Ausführungsform des Gegenstandes der Erfindung vorgesehen ist, daß die Sammelmittel aus einer Kombination von wenigstens einem Kältemittelsammler und einem hinsichtlich seines Fassungsvolumens gegenüber einem Einfachkanal vergrößerten Kanalabschnitt gebildet sind.With particularly simple, constructive means, the filling width of the filling evaporator system can be increased if after a preferred embodiment of the object of the invention is provided, that the collection means from a combination of at least one Refrigerant collector and one in terms of its capacity a single channel enlarged channel section are formed.
Eine erhebliche Stauraumvergrößerung zum Zwecke einer Ausweitung der Füllgrenzen des Verdampfersystems und somit einer Steigerung der Füllbreite des letzteren ergibt sich, wenn nach einer nächsten vorteilhaften Ausgestaltung des Gegenstandes der Erfindung vorgesehen ist, daß der Kältemittelsammler und der vergrößerte Kanalabschnitt in Reihenschaltung hintereinander angeordnet sind, wobei der Kältemittelsammler dem vergrößerten Kanalabschnitt in Fließrichtung des zwangsweise umgewälzten Kältemittels nachgelagert ist. Ferner bewirkt die Nachlagerung des Kältemittelsammlers, daß das flüssige Kältemittel im vorgelagerten Verdampfer zumindest weitestgehend zurückgehalten und ein Transport des flüssigen Kältemittels durch ein sogenanntes "Mitreißen" in den nachgeordneten Verdampfer unterbunden ist.A significant increase in storage space for the purpose of expanding the Filling limits of the evaporator system and thus an increase in the filling width of the the latter results if, according to a next advantageous embodiment of the The object of the invention is provided that the refrigerant collector and enlarged channel sections are arranged in series, wherein the refrigerant collector the enlarged channel section in the flow direction of the circulated refrigerant is downstream. Furthermore, the Storage of the refrigerant collector that the liquid refrigerant in upstream evaporator at least largely retained and one Transport of the liquid refrigerant by so-called "entraining" in the downstream evaporator is prevented.
Gemäß einer nächsten bevorzugten Ausführungsform des Gegenstandes der Erfindung ist vorgesehen, daß dem Kältemittelsammler in Fließrichtung des zwangsweise umgewälzten Kältemittels ein weiterer, in einen Kältemittelverbindungskanal zum nachgeordneten Verdampfer eingebrachter, hinsichtlich seines Fassungsvolumens vergrößerter Kanalabschnitt nachgeschaltet ist.According to a next preferred embodiment of the subject of Invention is provided that the refrigerant collector in the direction of flow forced refrigerant another, into one Refrigerant connection channel to the downstream evaporator, downstream channel section enlarged in terms of its volume is.
Durch eine derartige Maßnahme ist nicht nur ein weiterer Pufferraum geschaffen, sondern zusätzlich auch noch besonders sichergestellt, daß beim Betrieb des Kältemittelverdichters das flüssige Kältemittel deutlich weniger stark mitgerissen wird und somit eine ungewollte Kühlung des einen gewissen Zeitabschnitt aus dem Kältekreislauf ausgeblendeten Verdampfer sichergestellt ist. Such a measure not only creates another buffer space, but also also particularly ensures that when operating the Refrigerant compressor the liquid refrigerant entrained significantly less is and thus an unwanted cooling of a certain period of time from the Cooling circuit hidden evaporator is ensured.
Nach einer nächsten bevorzugten Ausführungsform des Gegenstandes der Erfindung ist vorgesehen, daß sich der vergrößerte Kanalabschnitt des Kältemittelverbindungskanals zumindest in den Anfangsbereich des nachgeordneten Verdampfers erstreckt.According to a next preferred embodiment of the subject of Invention is provided that the enlarged channel section of the Refrigerant connection channel at least in the initial area of the downstream evaporator extends.
Durch diese Maßnahme in Verbindung mit den am vorgelagerten Verdampfer vorgenommenen Maßnahmen, nämlich der Schaffung eines Kältemittelsammlers und die eines vergrößerten Kanalabschnittes ist eine besonders effektive Stauraumvergrößerung zur Pufferung von flüssigem Kältemittel geschaffen, wodurch sich die Füllbreite des Verdampfersystems mit flüssigem Kältemittel besonders deutlich erhöhen läßt. Ferner ist für jeden der beiden Verdampfer eine zumindest weitestgehend über deren Fläche gleichmäßige Kälteübertragung geschaffen.By this measure in connection with the upstream evaporator measures taken, namely the creation of a refrigerant collector and that of an enlarged channel section is a particularly effective one Enlarged storage space to buffer liquid refrigerant, which increases the filling width of the evaporator system with liquid refrigerant can be increased particularly significantly. There is also one for each of the two evaporators at least largely uniform cooling transmission over their surface created.
In der Großserie besonders fertigungsfreundlich herstellen lassen sich die Verdampfer, wenn nach einer nächsten vorteilhaften Ausgestaltung des Gegenstandes der Erfindung vorgesehen ist, daß die Verdampfer durch Platinenabschnitte einer nach dem Roll-Bond-oder nach dem Z-Bond-Verfahren hergestellten Verdampferplatine gebildet sind.In the large series, they can be manufactured particularly easily Evaporator if according to a next advantageous embodiment of the The object of the invention is provided that the evaporator Circuit board sections according to the roll bond or the Z bond process manufactured evaporator board are formed.
Besonders zweckmäßig ausbildbar ist ein Kühlgerät mit Verdampfern, wenn nach einer weiteren bevorzugten Ausführungsform des Gegenstandes der Erfindung vorgesehen ist, daß die Verdampfer eine unterschiedliche Kälteleistung aufweisen, wobei der nachgeordnete Verdampfer geringerer Kälteleistung als Kühlfachverdampfer und der andere als Frischkühlverdampfer ausgebildet ist.A cooling device with evaporators is particularly useful if after a further preferred embodiment of the subject of the invention it is provided that the evaporators have a different cooling capacity, the downstream evaporator has a lower cooling capacity than Cooling compartment evaporator and the other is designed as a fresh cooling evaporator.
Gemäß einer letzten bevorzugten Ausführungsform des Gegenstandes der Erfindung ist vorgesehen, daß die Verdampferplatine drei als Verdampfer dienende Platinenabschnitte umfaßt, von denen der in Reihenschaltung voraneilende als Gefrierfachverdampfer, der unmittelbar nachfolgende als Frischkühlverdampfer und der diesem nachgelagerte als Kühlfachverdampfer ausgebildet ist. According to a last preferred embodiment of the subject of Invention is provided that the evaporator board three serving as evaporators Includes board sections, of which the leading in series as Freezer evaporator, the immediately following as a fresh cooling evaporator and the downstream of this is designed as a refrigerator compartment evaporator.
In Verbindung mit den Kältemittelpuffermaßnahmen innerhalb des dem Kühlfachverdampfer vorgelagerten Frischkühlfachverdampfers läßt sich nicht nur die Füllbreite des Verdampfersystems mit flüssigem Kältemittel zumindest auf den doppelten Wert gegenüber der herkömmlichen Verdampfersysteme steigern, sondern auch sicherstellen, daß der Kühlfachverdampfer für den Fall, daß das Reservoir zur Aufnahme von flüssigem Kältemittel innerhalb des Kältekreislaufes geschaltet ist, nicht mit flüssigem Kältemittel beaufschlagt und somit bestimmungsgemäß nicht gekühlt ist. Gleichzeitig ist die Kältemittelmenge aber geeignet, am Gefrierfachverdampfer die volle Kälteleistung zu erhalten.In conjunction with the refrigerant buffering measures within the Cooling compartment evaporator upstream fresh cooling compartment evaporator can not only the filling width of the evaporator system with liquid refrigerant at least on the increase double the value compared to conventional evaporator systems, but also make sure that the refrigerator compartment evaporator in the event that Reservoir for the absorption of liquid refrigerant within the refrigeration cycle is switched, not charged with liquid refrigerant and thus is not cooled as intended. At the same time, however, the amount of refrigerant suitable for maintaining the full cooling capacity on the freezer compartment evaporator.
Die Erfindung ist in der nachfolgenden Beschreibung anhand eines in der beigefügten Zeichnung vereinfacht dargestellten Ausführungsbeispieles erläutert.The invention is in the following description based on one in the attached drawing illustrated simplified embodiment.
Die einzige Figur zeigt eine in ein Einkreiskältesystem eingebundene Verdampferplatine mit drei Verdampfern, von denen der in der Reihenschaltung der Verdampfer zwischen den beiden Verdampfern angeordnete Frischkühlfachverdampfer mit Sammelmitteln zur Pufferung von Kältemittel ausgestattet ist.The only figure shows one integrated in a single-circuit cooling system Evaporator board with three evaporators, one of which is connected in series Evaporator arranged between the two evaporators Fresh cooler evaporator with collection agent for buffering refrigerant Is provided.
In der einzigen Figur ist in vereinfachter schematischer Darstellung ein
Einkreiskältesystem 10 gezeigt, welches einen Verdichter 11 und einen Verflüssiger
12 aufweist, an dessen Ausgang ein zur Aufnahme von flüssigem Kältemittel
dienendes Reservoir 13 vorgesehen ist, welches über ein von einer nicht gezeigten
Steuerelektronik angesteuerten Drei-/Zweiwegemagnetventil 14 in den
Kältekreislauf schaltbar ist. Dem Magnetventil 14 ist an seiner Ausgangsseite ein
Trockner 15 nachgeordnet, welchem wiederum eine als Kapillarrohr ausgebildete
Drossel 16 nachgelagert ist. Das Kapillarrohr 16 ist einem zu einer einstückigen
Verdampferplatine 17 gehörende Platinenabschnitt 18 zugeführt, welcher in seiner
Einbaulage als u-förmig abgewinkelter Gefrierfachverdampfer ausgebildet ist, in
dessen durch einen seiner Schenkel gebildeten Decke das Kapillarrohr 16 verprägt
ist und als Einspritzstelle 19 dient. An die Einspritzstelle 19 schließt sich ein über die
Fläche des Platinenabschnitts 18 geführter Kältemittelkanal 20 an, welcher als
sogenannter Einfachkanal aus der Decke des Gefrierfachverdampfers
herausgeführt und über einen an die Verdampferplatine 17 mitangeformten
Verbindungssteg 21 als Einfachkanal einem als Frischkühlfachverdampfer
ausgebildeten Platinenabschnitts 22 zugeführt ist, welcher kältetechnisch dem als _
Gefrierfachverdampfer ausgebildeten Platinenabschnitt 18 nachgeordnet ist. Der als
Einfachkanal dem Platinenabschnitt 22 zugeführte Kältemittelkanal 20 weist
innerhalb des Platinenabschnitts 22 einen im Hinblick auf den Querschnitt des
Einfachkanals mit deutlich vergrößertem Kanalquerschnitt ausgestatteten Kanalabschnitt
23 auf, welchem ein über einen Einfachkanalabschnitt angebundener
Kältemittelsammler 24 nachgeschaltet ist, welcher zusammen mit dem
vergrößertem Kanalabschnitt 23 als Puffer für flüssiges Kältemittel innerhalb des
Platinenabschnitts 22 dient. Durch den ausgangsseitig am Platinenabschnitt 22
angeordneten Kältemittelsammler 24, insbesondere durch dessen sackähnlichen
Aufbau, wird zugleich zumindest weitestgehend sichergestellt, daß flüssiges
Kältemittel beim Betrieb des Kältemittelverdichters 11 innerhalb des Platinenabschnitts
22 zurückgehalten ist. Dem Kältemittelsammler 24 ist ausgangsseitig ein
ebenfalls in seinem Querschnitt vergrößerter Kanalabschnitt 25 des
Kältemittelkanals 20 nachgelagert, welcher zumindest zu einem bestimmten Teil
seiner Länge innerhalb des Verbindungssteges 21 angeordnet ist und welcher auf
seiner dem Kältemittelsammler 24 zugewandten Zuflußseite einen als Doppelkanal
26 ausgebildeten Kanalteil aufweist, welcher ausschließlich auf dem
Verbindungssteg 21 vorgesehen ist. Der Doppelkanal 26 ist in einem ähnlich dem
vergrößerten Kanalabschnitt 23 ausgebildeten Kanalteil 27 des Kanalabschnittes 25
zusammengeführt, wobei der Kanalteil 27 über einen Teil seiner Länge innerhalb
des Verbindungssteges 21 angeordnet ist, während sein überwiegender
Längenabschnitt innerhalb eines dem Platinenabschnitt 22 kältetechnisch
nachgelagerten, als Kühlfachverdampfer dienenden Platinenabschnitt 28 vorgesehen
ist. Im Anschluß an den Kanalteil 27 innerhalb des Platinenabschnitts 28
ist der Kältemittelkanal 20 wiederum als Einfachkanal weitergeführt und über den
Verbindungssteg 21 auf den Platinenabschnitt 18 zurückgeführt, wo er in dessen
Deckenabschnitt an einer Absaugstelle 29 mündet. In the single figure, a is a simplified schematic representation
Single-
Neben der beispielsweise im Roll-Bond- oder Z-Bond-Verfahren hergestellten Verdampferplatine
17 ist die Erfindung auch auf einzelne Verdampferplatinen
anwendbar.In addition to the evaporator board manufactured, for example, in the roll-bond or Z-
Claims (8)
- Single-circuit refrigerating system (10) with a reservoir (13), which is selectably connectible into its refrigerating circuit by way of diverter means (14), for reception of refrigerant and at least two evaporators (22, 28), of which the evaporator (28) arranged downstream in the series is controlled with respect to its temperature by the refrigerant extraction by way of the reservoir, characterised in that the evaporator (22) which is upstream in the series comprises a refrigerant channel arrangement (20) equipped at least extensively with collecting means (23, 24) serving for the buffer storage of liquid refrigerant.
- Single-circuit refrigerating system according to claim 1, characterised in that the collecting means (23, 24) are formed from a combination of at least one refrigerant collector (24) and a channel section (23) which is enlarged with respect to its holding volume relative to a plain channel.
- Single-circuit refrigerating system according to claim 2, characterised in that the refrigerant collector (24) in the enlarged channel section (23) are arranged in series connection one behind the other, wherein the refrigerant collector (24) is located in the enlarged channel section (23) downstream in flow direction of the forcibly circulated refrigerant.
- Single-circuit refrigerating system according to one of claims 2 and 3, characterised in that a further channel section (25), which is located in a refrigerant connecting channel to the downstream evaporator (28) and enlarged with respect to its holding volume, is connected downstream of the refrigerant collector (24) in flow direction of the forcibly circulated refrigerant.
- Single-circuit refrigerating machine according to claim 4, characterised in that the enlarged channel section (25) of the refrigerant connecting channel extends at least into the start region of the downstream evaporator (28).
- Single-circuit refrigerating machine according to one of claims 1 to 5, characterised in that the evaporators have a different refrigerating output, wherein the downstream evaporator (28) of smaller refrigerating output is constructed as cooling compartment evaporator and the other evaporator (22), which is equipped with the collecting means (23, 24), as evaporator for the compartment for cooling to be fresh.
- Single-circuit refrigerating machine according to one of claims 1 to 6, characterised in that the evaporators are formed by plate sections (22, 28) of an evaporator plate (17) produced according to the roll-bond method or the Z-bond method.
- Single-circuit refrigerating machine according to claim 7, characterised in that the evaporator plate (17) comprises three plate sections (18, 22, 28) which serve as evaporators and of which the one leading in the series is constructed as freezer compartment evaporator (18), the directly following one, which is provided with the collecting means (23, 24) is constructed as evaporator (22) for a compartment for cooling to be fresh and the evaporator downstream of these is constructed as cooling compartment
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SI9930083T SI1116002T1 (en) | 1998-09-22 | 1999-09-10 | Single-circuit cooling system |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19843484 | 1998-09-22 | ||
| DE19843484A DE19843484A1 (en) | 1998-09-22 | 1998-09-22 | Single circuit refrigeration system has selectively connectable reservoir in refrigeration circuit for accommodating refrigerant and at least two evaporators |
| PCT/EP1999/006709 WO2000017588A1 (en) | 1998-09-22 | 1999-09-10 | Single-circuit cooling system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1116002A1 EP1116002A1 (en) | 2001-07-18 |
| EP1116002B1 true EP1116002B1 (en) | 2002-05-08 |
Family
ID=7881869
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP99969485A Expired - Lifetime EP1116002B1 (en) | 1998-09-22 | 1999-09-10 | Single-circuit cooling system |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP1116002B1 (en) |
| AT (1) | ATE217409T1 (en) |
| DE (2) | DE19843484A1 (en) |
| DK (1) | DK1116002T3 (en) |
| ES (1) | ES2177349T3 (en) |
| PL (1) | PL192582B1 (en) |
| TR (1) | TR200100664T2 (en) |
| WO (1) | WO2000017588A1 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BR9905700A (en) | 1999-12-03 | 2001-09-25 | Brasil Compressores Sa | Improvement in refrigeration circuit |
| DE10053420A1 (en) * | 2000-10-27 | 2002-05-08 | Bsh Bosch Siemens Hausgeraete | Evaporator and refrigerator for a zeotropic mixture of refrigerants |
| DE10055916A1 (en) * | 2000-11-10 | 2002-05-23 | Bsh Bosch Siemens Hausgeraete | Coolant circuit for refrigeration machine has feed line containing capillary and pilot valve, with at least some coolant flowing through pilot valve and capillary in succession |
| DE10145139A1 (en) * | 2001-09-13 | 2003-04-03 | Bsh Bosch Siemens Hausgeraete | Refrigerator with two evaporators |
| DE10162500A1 (en) | 2001-12-19 | 2003-07-03 | Bsh Bosch Siemens Hausgeraete | Chiller with a pressure-side refrigerant collector |
| DE102012218700A1 (en) | 2012-10-15 | 2014-04-17 | BSH Bosch und Siemens Hausgeräte GmbH | The refrigerator |
| DE102019112093A1 (en) * | 2018-07-12 | 2020-01-16 | Liebherr-Hausgeräte Ochsenhausen GmbH | Refrigerator and / or freezer |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2544938A (en) * | 1948-03-24 | 1951-03-13 | Nash Kelvinator Corp | Refrigerant evaporator |
| DE2506750C2 (en) * | 1975-02-18 | 1985-01-31 | Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart | Refrigerated cabinets, especially two-temperature refrigerators |
| DE2539914C2 (en) * | 1975-09-09 | 1985-04-04 | Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart | Refrigerated cabinets, especially two-temperature refrigerators |
| DE4433712A1 (en) * | 1994-09-21 | 1996-03-28 | Bosch Siemens Hausgeraete | Refrigerated cabinets with at least two compartments of different temperatures |
-
1998
- 1998-09-22 DE DE19843484A patent/DE19843484A1/en not_active Withdrawn
-
1999
- 1999-09-10 PL PL346712A patent/PL192582B1/en not_active IP Right Cessation
- 1999-09-10 WO PCT/EP1999/006709 patent/WO2000017588A1/en active IP Right Grant
- 1999-09-10 DE DE59901418T patent/DE59901418D1/en not_active Expired - Lifetime
- 1999-09-10 DK DK99969485T patent/DK1116002T3/en active
- 1999-09-10 ES ES99969485T patent/ES2177349T3/en not_active Expired - Lifetime
- 1999-09-10 EP EP99969485A patent/EP1116002B1/en not_active Expired - Lifetime
- 1999-09-10 AT AT99969485T patent/ATE217409T1/en not_active IP Right Cessation
- 1999-09-10 TR TR2001/00664T patent/TR200100664T2/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| ES2177349T3 (en) | 2002-12-01 |
| DE19843484A1 (en) | 2000-03-23 |
| WO2000017588A1 (en) | 2000-03-30 |
| PL192582B1 (en) | 2006-11-30 |
| DK1116002T3 (en) | 2002-08-26 |
| PL346712A1 (en) | 2002-02-25 |
| TR200100664T2 (en) | 2001-07-23 |
| EP1116002A1 (en) | 2001-07-18 |
| DE59901418D1 (en) | 2002-06-13 |
| ATE217409T1 (en) | 2002-05-15 |
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