EP3511656A1 - Cooling machine with adaptive nozzle - Google Patents
Cooling machine with adaptive nozzle Download PDFInfo
- Publication number
- EP3511656A1 EP3511656A1 EP18211246.6A EP18211246A EP3511656A1 EP 3511656 A1 EP3511656 A1 EP 3511656A1 EP 18211246 A EP18211246 A EP 18211246A EP 3511656 A1 EP3511656 A1 EP 3511656A1
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- EP
- European Patent Office
- Prior art keywords
- adaptive
- throttle
- coolant
- tube
- shape memory
- 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.)
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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
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/37—Capillary tubes
- F25B41/375—Capillary tubes characterised by a variable restriction, e.g. restrictors made of shape memory alloy
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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
- F25B2341/00—Details of ejectors not being used as compression device; Details of flow restrictors or expansion valves
- F25B2341/06—Details of flow restrictors or expansion valves
- F25B2341/068—Expansion valves combined with a sensor
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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
- F25B2500/00—Problems to be solved
- F25B2500/29—High ambient temperatures
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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
- F25B2500/00—Problems to be solved
- F25B2500/31—Low ambient temperatures
Definitions
- the present invention relates to a refrigeration machine having a throttle with a tube comprising an adaptive material. Due to the adaptive material, the flow through the throttle changes depending on the ambient temperature.
- a gaseous refrigerant is compressed by a compressor to increase the pressure.
- the refrigerant condenses, giving off heat to the environment of the refrigerator.
- the now liquid coolant is directed to a throttle where the pressure is reduced again.
- the coolant then absorbs heat from the inner walls of an adjacent refrigerator and evaporates.
- the gaseous coolant is then in turn compressed by the compressor and the cycle closed.
- the evaporation temperature in a chiller is optimized for a certain ambient temperature, so that the cooling of the chiller achieves the highest possible efficiency.
- the prerequisite for high efficiency is the optimal filling of the evaporator, in which the area for the heat transfer in the evaporator is maximized.
- the heat transfer through the wall of the cold room depends on the surface and the temperature difference. The larger the heat exchange surface area, the smaller the temperature difference between the cooling point and the coolant required for a desired cooling capacity. If a lower temperature difference is required, the evaporation temperature can be selected to be correspondingly higher.
- a higher evaporation temperature is equivalent to a higher one Evaporative pressure, which in turn means that the compressor has less compaction work to do.
- the actuator for the control of the level of the evaporator is the throttle. If this is opened further, pressure and temperature rise in the evaporator. If the throttle is closed again, the temperature and pressure in the evaporator will drop.
- the mass flow of the coolant depends largely on the cross section and the length and shape of the throttle.
- the flow can be adjusted to the ambient temperature, thereby increasing the efficiency of the chiller.
- a bi-stable solenoid valve with two different chokes can be used to reduce the loss of efficiency. These two chokes are optimized for two different ambient temperatures, each switching to the choke whose flow is most efficient at the actual ambient temperature.
- the invention relates to a refrigeration machine comprising a compressor, a condenser, an evaporator and an adaptive throttle.
- the individual components are flowed through by a liquid or gaseous coolant, which serves for heat transport.
- the adaptive throttle has at least one tube comprising an adaptive material.
- the mass flow of the coolant through the adaptive throttle thus significantly depends on the cross section or the length and shape of the at least one tube of the adaptive throttle at the respective ambient temperature.
- a change in ambient temperature results in a change in the shape of the adaptive material, which changes the mass flow of the coolant through the adaptive throttle.
- the ambient temperature is the temperature that prevails outside of an insulated refrigerator of the refrigerator.
- the optimal filling of the evaporator with the coolant is thus ensured even with an increase or decrease in the ambient temperature, whereby the highest possible evaporation temperatures and thus a high efficiency of the chiller are guaranteed.
- the at least one tube of the adaptive throttle can
- the adaptive material include other materials. When selecting these materials, it should be noted that their material properties do not cancel the shape memory effect of the adaptive material - the temperature-dependent transformation of the crystal structure into an "embossed" shape - and the choke thereby loses its function.
- a falling or rising ambient temperature may result in a change in the diameter, length, and / or shape of the at least one adaptive throttle tube.
- the mass flow of the coolant can be controlled as a function of the respectively prevailing ambient temperature of the chiller.
- the adaptive material used in the refrigerator is a shape memory material.
- shape memory materials are usually metal alloys. While most metals always have the same crystal structures up to their melting point, shape memory materials have two different crystal structures depending on their temperature. If a shape memory material is deformed, its crystal structure changes first. By heating the shape memory material to a phase transition temperature, the atoms in the crystal lattice regain their original arrangement and the original shape returns without any further external application of force. The phase transformation is independent of the rate at which the temperature changes. Shape memory materials and the associated temperature-dependent high restoring forces can be used particularly advantageously in refrigerators and chokes used there.
- a change in shape of the at least one tube of the adaptive throttle can be effected by a conversion of the crystal structure of the shape memory material as a function of the ambient temperature and thus optimally adapt the flow of the cooling material through the adaptive throttle into the evaporator.
- shape memory materials show low fatigue, whereby they reliably assume their original shape even with a very high number of phase transformation.
- the size of the shape memory material of the chiller can be changed at least in one direction during the phase transformation by at least 3%.
- the phase transformation thus leads to a not inconsiderable change in size of the shape memory material and thus to a reduction or enlargement of the cross section and / or to a shortening or lengthening of the at least one tube of the adaptive throttle.
- the tube of the adaptive throttle of the refrigerator on its inside a coating for the thermal decoupling of the tube of the adaptive throttle of the coolant used.
- the temperature of the coolant has no or at least only a negligible influence on the size change of the at least one tube of the adaptive throttle and thus on the circulating through the adaptive throttle in the evaporator mass flow of the coolant.
- the at least one pipe of the adaptive throttle thus only the ambient temperature of the refrigerator is the relevant size, whereby the optimal filling of the evaporator is unaffected by the temperature of the coolant.
- the chiller described above which comprises an adaptive throttle, can be used particularly advantageously for cooling refrigerators.
- shape memory materials are used as a tube for a throttle for temperature-dependent change in the flow of the coolant.
- Such adaptive chokes can be used wherever the flow is to be adjusted to the ambient temperature. Possible applications include heat pumps. The advantages of adaptive chokes described above can be transferred.
- FIG. 1 shows a schematic representation of a refrigerator with an embodiment of the adaptive throttle.
- FIG. 1 shows a schematic representation of a refrigerator with an embodiment of the adaptive throttle 3 in a refrigerator, not shown.
- This has a compressor 1, a condenser 2, an adaptive throttle 3 and an evaporator 4.
- a tube of the adaptive throttle 3 in this case comprises a shape memory material.
- the evaporator 4 is arranged next to a cooling space 6 to be cooled, which is shielded by means of a cooling space insulation 5 from temperature influences of the environment.
- the chiller circulates a coolant as a heat transfer medium. This is compressed in a compressor 1 and thereby heated.
- a condenser 2 the heat is released to the environment of the refrigerator. Subsequently, the coolant flows through the pipe of the adaptive throttle 3, in this case the pressure of the coolant is reduced.
- the diameter, the length and / or the shape of the tube of the adaptive throttle 3 are dependent on the ambient temperature due to the properties of the shape memory materials. If the temperature of the shape memory material of the adaptive reactor tube 3 exceeds a phase change temperature of the shape memory material, the crystal structure of the adaptive reactor tube 3 changes. From this phase transformation, a change in the diameter, length and / or shape of the adaptive reactor tube 3 results. Depending on the prevailing ambient temperature of the refrigeration machine, the mass flow of the coolant through the tube of the adaptive throttle 3 is thus reduced or increased. From the adaptive throttle 3 from the coolant flows into the evaporator 4. By adjusting the mass flow through the adaptive throttle 3 optimal filling of the evaporator 4 is achieved with the coolant. In the evaporator 4, the coolant absorbs heat from the inner wall of the cooling chamber 6, evaporates and subsequently flows to the compressor 1, whereupon the cycle begins again.
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- Engineering & Computer Science (AREA)
- Metallurgy (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
- Temperature-Responsive Valves (AREA)
Abstract
Die vorliegende Erfindung betrifft eine Kältemaschine, welche einen Verdichter (1), einen Verflüssiger (2), einen Verdampfer (4) und eine adaptive Drossel (3) umfasst. Durch die einzelnen Komponenten zirkuliert ein Kühlmittel. Zumindest ein Rohr der adaptiven Drossel (3) umfasst ein adaptives Material, wobei sich bei einer Änderung der Umgebungstemperatur der Durchfluss durch das zumindest eine Rohr der adaptiven Drossel (3) ändert.The present invention relates to a refrigeration machine which comprises a compressor (1), a condenser (2), an evaporator (4) and an adaptive throttle (3). A coolant circulates through the individual components. At least one tube of the adaptive throttle (3) comprises an adaptive material, the flow through the at least one tube of the adaptive throttle (3) changing when the ambient temperature changes.
Description
Die vorliegende Erfindung betrifft eine Kältemaschine die über eine Drossel mit einem Rohr verfügt, welches ein adaptives Material umfasst. Aufgrund des adaptiven Materials ändert sich der Durchfluss durch die Drossel in Abhängigkeit von der Umgebungstemperatur.The present invention relates to a refrigeration machine having a throttle with a tube comprising an adaptive material. Due to the adaptive material, the flow through the throttle changes depending on the ambient temperature.
In einer Kältemaschine wird in einem Kreisprozess ein gasförmiges Kühlmittel von einem Verdichter unter Erhöhung des Drucks komprimiert. In einem nachgeschalteten Verflüssiger kondensiert das Kühlmittel, wobei es Wärme an die Umgebung der Kältemaschine abgibt. Im Anschluss daran wird das nun flüssige Kühlmittel zu einer Drossel geleitet, wo der Druck wiederum reduziert wird. In einem Verdampfer nimmt das Kühlmittel anschließend Wärme aus den Innenwänden eines benachbarten Kühlraums auf und verdampft. Das gasförmige Kühlmittel wird im Anschluss daran wiederum vom Verdichter verdichtet und der Kreisprozess geschlossen.In a refrigerating machine, in a cyclic process, a gaseous refrigerant is compressed by a compressor to increase the pressure. In a downstream condenser, the refrigerant condenses, giving off heat to the environment of the refrigerator. Following this, the now liquid coolant is directed to a throttle where the pressure is reduced again. In an evaporator, the coolant then absorbs heat from the inner walls of an adjacent refrigerator and evaporates. The gaseous coolant is then in turn compressed by the compressor and the cycle closed.
Die Verdampfungstemperatur in einer Kältemaschine ist auf eine bestimmte Umgebungstemperatur optimiert, so dass die Kühlung der Kältemaschine einen möglichst hohen Wirkungsgrad erreicht. Voraussetzung für einen hohen Wirkungsgrad ist die optimale Befüllung des Verdampfers, bei der die Fläche für den Wärmeübergang im Verdampfer maximiert wird. Der Wärmetransport durch die Wand des Kühlraums hängt von der Oberfläche und der Temperaturdifferenz ab. Je größer die Wärmeaustauschfläche ist, desto kleiner ist die für eine gewünschte Kühlleistung erforderliche Temperaturdifferenz zwischen der Kühlstelle und dem Kühlmittel. Benötigt man eine geringere Temperaturdifferenz, kann die Verdampfungstemperatur entsprechend höher gewählt werden. Eine höhere Verdampfungstemperatur ist gleichbedeutend mit einem höheren Verdampfungsdruck, was wiederum bedeutet, dass der Kompressor weniger Verdichtungsarbeit leisten muss. Das Stellglied für die Regelung des Füllstandes des Verdampfers ist die Drossel. Wird diese weiter geöffnet, steigen Druck und Temperatur im Verdampfer an. Wird die Drossel wiederum geschlossen sinken die Temperatur und der Druck im Verdampfer. Der Massestrom des Kühlmittels hängt dabei maßgeblich von deren Querschnitt bzw. der Länge und Form der Drossel ab.The evaporation temperature in a chiller is optimized for a certain ambient temperature, so that the cooling of the chiller achieves the highest possible efficiency. The prerequisite for high efficiency is the optimal filling of the evaporator, in which the area for the heat transfer in the evaporator is maximized. The heat transfer through the wall of the cold room depends on the surface and the temperature difference. The larger the heat exchange surface area, the smaller the temperature difference between the cooling point and the coolant required for a desired cooling capacity. If a lower temperature difference is required, the evaporation temperature can be selected to be correspondingly higher. A higher evaporation temperature is equivalent to a higher one Evaporative pressure, which in turn means that the compressor has less compaction work to do. The actuator for the control of the level of the evaporator is the throttle. If this is opened further, pressure and temperature rise in the evaporator. If the throttle is closed again, the temperature and pressure in the evaporator will drop. The mass flow of the coolant depends largely on the cross section and the length and shape of the throttle.
Durch den Einsatz von elektrisch geregelten Expansionsventilen oder thermischen Expansionsventilen kann der Durchfluss an die Umgebungstemperatur angepasst werden und damit die Effizienz der Kältemaschine erhöht werden. Weiterhin kann auch ein bi-stabiles Magnetventil mit zwei unterschiedlichen Drosseln zur Verminderung des Effizienzverlusts eingesetzt werden. Diese beiden Drosseln werden auf zwei unterschiedliche Umgebungstemperaturen optimiert, wobei jeweils auf die Drossel umgeschaltet wird, deren Durchfluss bei der tatsächlich herrschenden Umgebungstemperatur am effizientesten ist.By using electrically controlled expansion valves or thermal expansion valves, the flow can be adjusted to the ambient temperature, thereby increasing the efficiency of the chiller. Furthermore, a bi-stable solenoid valve with two different chokes can be used to reduce the loss of efficiency. These two chokes are optimized for two different ambient temperatures, each switching to the choke whose flow is most efficient at the actual ambient temperature.
Die Erfindung betrifft eine Kältemaschine, welche einen Verdichter, einen Verflüssiger, einen Verdampfer und eine adaptive Drossel umfasst. Die einzelnen Komponenten werden dabei von einem flüssigen oder gasförmigen Kühlmittel durchströmt, welches zum Wärmetransport dient. Die adaptive Drossel weist zumindest ein Rohr auf, welches ein adaptives Material umfasst. Der Massestrom des Kühlmittels durch die adaptive Drossel hängt somit maßgeblich vom Querschnitt bzw. der Länge und Form des zumindest einen Rohrs der adaptiven Drossel bei der jeweiligen Umgebungstemperatur ab. Eine Änderung der Umgebungstemperatur führt zu einer Änderung der Form des adaptiven Materials, wodurch sich der Massestrom des Kühlmittels durch die adaptive Drossel verändert. Die Umgebungstemperatur ist dabei die Temperatur die außerhalb eines isolierten Kühlraums der Kältemaschine herrscht. Die optimale Füllung des Verdampfers mit dem Kühlmittel wird somit auch bei einem Anstieg oder Abfall der Umgebungstemperatur sicherstellt, wodurch möglichst hohe Verdampfungstemperaturen und damit eine hohe Effizienz der Kältemaschine gewährleistet werden. Das zumindest eine Rohr der adaptiven Drossel kann neben dem adaptiven Material noch weitere Materialien umfassen. Bei der Auswahl dieser Materialien ist zu berücksichtigen, dass deren Materialeigenschaften den Formgedächtniseffekt des adaptiven Materials - die temperaturabhängige Umwandlung der Kristallstruktur in eine "eingeprägte" Form - nicht aufheben und die Drossel dadurch ihre Funktion verliert.The invention relates to a refrigeration machine comprising a compressor, a condenser, an evaporator and an adaptive throttle. The individual components are flowed through by a liquid or gaseous coolant, which serves for heat transport. The adaptive throttle has at least one tube comprising an adaptive material. The mass flow of the coolant through the adaptive throttle thus significantly depends on the cross section or the length and shape of the at least one tube of the adaptive throttle at the respective ambient temperature. A change in ambient temperature results in a change in the shape of the adaptive material, which changes the mass flow of the coolant through the adaptive throttle. The ambient temperature is the temperature that prevails outside of an insulated refrigerator of the refrigerator. The optimal filling of the evaporator with the coolant is thus ensured even with an increase or decrease in the ambient temperature, whereby the highest possible evaporation temperatures and thus a high efficiency of the chiller are guaranteed. The at least one tube of the adaptive throttle can In addition to the adaptive material include other materials. When selecting these materials, it should be noted that their material properties do not cancel the shape memory effect of the adaptive material - the temperature-dependent transformation of the crystal structure into an "embossed" shape - and the choke thereby loses its function.
Gemäß einem Aspekt der Erfindung kann eine fallende oder ansteigende Umgebungstemperatur zu einer Änderung des Durchmessers, der Länge und/oder Form des zumindest einen Rohrs der adaptiven Drossel führen. Wie bereits erläutert kann der Massestrom des Kühlmittels in Abhängigkeit zu der jeweils herrschenden Umgebungstemperatur der Kältemaschine gesteuert werden.In accordance with one aspect of the invention, a falling or rising ambient temperature may result in a change in the diameter, length, and / or shape of the at least one adaptive throttle tube. As already explained, the mass flow of the coolant can be controlled as a function of the respectively prevailing ambient temperature of the chiller.
Gemäß einem Aspekt ist das bei der Kältemaschine verwendete adaptive Material ein Formgedächtnismaterial. Bei Formgedächtnismaterialien handelt es sich meist um Metalllegierungen. Während die meisten Metalle immer dieselben Kristallstrukturen bis zu ihrem Schmelzpunkt besitzen, haben Formgedächtnismaterialien abhängig von ihrer Temperatur zwei unterschiedliche Kristallstrukturen. Wird ein Formgedächtnismaterial verformt, verändert sich zunächst dessen Kristallstruktur. Durch die Erwärmung des Formgedächtnismaterials auf eine Phasenübergangstemperatur nehmen die Atome im Kristallgitter wieder ihre ursprüngliche Anordnung ein und die ursprüngliche Form kehrt ohne eine weitere äußere Kraftanwendung zurück. Die Phasenumwandlung ist dabei unabhängig von der Geschwindigkeit mit der sich die Temperatur ändert. Formgedächtnismaterialien und die damit verbundenen temperaturabhängigen hohen Rückstellungskräfte lassen sich besonders vorteilhaft in Kältemaschinen und dort verwendeten Drosseln einsetzen. Auf diese Weise lässt sich eine Formänderung des zumindest einen Rohrs der adaptiven Drossel durch eine Umwandlung der Kristallstruktur des Formgedächtnismaterials in Abhängigkeit von der Umgebungstemperatur bewirken und somit der Durchfluss des Kühlmaterials durch die adaptive Drossel in den Verdampfer optimal anpassen. Vorteilhaft wirkt sich auch der Umstand aus, dass Formgedächtnismaterialien geringe Ermüdung zeigen, wodurch sie auch bei einer sehr hohen Anzahl an Phasenumwandlung ihre ursprünglich vorgegebene Form zuverlässig einnehmen.In one aspect, the adaptive material used in the refrigerator is a shape memory material. In shape memory materials are usually metal alloys. While most metals always have the same crystal structures up to their melting point, shape memory materials have two different crystal structures depending on their temperature. If a shape memory material is deformed, its crystal structure changes first. By heating the shape memory material to a phase transition temperature, the atoms in the crystal lattice regain their original arrangement and the original shape returns without any further external application of force. The phase transformation is independent of the rate at which the temperature changes. Shape memory materials and the associated temperature-dependent high restoring forces can be used particularly advantageously in refrigerators and chokes used there. In this way, a change in shape of the at least one tube of the adaptive throttle can be effected by a conversion of the crystal structure of the shape memory material as a function of the ambient temperature and thus optimally adapt the flow of the cooling material through the adaptive throttle into the evaporator. Advantageously, the fact that shape memory materials show low fatigue, whereby they reliably assume their original shape even with a very high number of phase transformation.
Insbesondere lässt sich die Größe des Formgedächtnismaterials der Kältemaschine zumindest in eine Richtung bei der Phasenumwandlung um mindestens 3% verändern. Die Phasenumwandlung führt somit zu einer nicht unerheblichen Größenänderung des Formgedächtnismaterials und damit zu einer Verkleinerung bzw. Vergrößerung des Querschnitts und/oder zu einer Verkürzung bzw. Verlängerung des zumindest einen Rohrs der adaptiven Drossel. Durch die damit verbundene temperaturabhängige Regulierung des Kühlmittelmassestroms lassen sich eine optimale Befüllung des Verdampfers und damit eine hohe Effizienz der Kühlmaschine erreichen.In particular, the size of the shape memory material of the chiller can be changed at least in one direction during the phase transformation by at least 3%. The phase transformation thus leads to a not inconsiderable change in size of the shape memory material and thus to a reduction or enlargement of the cross section and / or to a shortening or lengthening of the at least one tube of the adaptive throttle. By the associated temperature-dependent regulation of the coolant mass flow, an optimal filling of the evaporator and thus a high efficiency of the cooling machine can be achieved.
Vorteilhafterweise weist das Rohr der adaptiven Drossel der Kältemaschine auf seiner Innenseite eine Beschichtung zur thermischen Entkopplung des Rohrs der adaptiven Drossel von dem verwendeten Kühlmittel auf. Somit wird erreicht, dass die Temperatur des Kühlmittels keinen oder zumindest nur einen vernachlässigbaren Einfluss auf die Größenänderung des zumindest einen Rohres der adaptiven Drossel und damit auf den durch die adaptive Drossel in den Verdampfer zirkulierenden Massestrom des Kühlmittels hat. Für den Durchfluss durch das zumindest eine Rohr der adaptiven Drossel ist somit lediglich die Umgebungstemperatur der Kältemaschine die maßgebliche Größe, wodurch die optimale Befüllung des Verdampfers von der Temperatur des Kühlmittels unbeeinflusst ist.Advantageously, the tube of the adaptive throttle of the refrigerator on its inside a coating for the thermal decoupling of the tube of the adaptive throttle of the coolant used. Thus, it is achieved that the temperature of the coolant has no or at least only a negligible influence on the size change of the at least one tube of the adaptive throttle and thus on the circulating through the adaptive throttle in the evaporator mass flow of the coolant. For the flow through the at least one pipe of the adaptive throttle thus only the ambient temperature of the refrigerator is the relevant size, whereby the optimal filling of the evaporator is unaffected by the temperature of the coolant.
Die oben beschriebene Kältemaschine, die eine adaptive Drossel umfasst, lässt sich besonders vorteilhaft zur Kühlung von Kühlschränken einsetzen.The chiller described above, which comprises an adaptive throttle, can be used particularly advantageously for cooling refrigerators.
Des Weiteren werden Formgedächtnismaterialien als Rohr für eine Drossel zur temperaturabhängigen Änderung des Durchflusses des Kühlmittels verwendet. Solche adaptive Drosseln können überall dort eingesetzt werden, wo der Durchfluss an die Umgebungstemperatur angepasst werden soll. Mögliche Einsatzgebiete sind beispielsweise Wärmepumpen. Die vorstehend beschriebenen Vorteile von adaptiven Drosseln lassen sich übertragen.Furthermore, shape memory materials are used as a tube for a throttle for temperature-dependent change in the flow of the coolant. Such adaptive chokes can be used wherever the flow is to be adjusted to the ambient temperature. Possible applications include heat pumps. The advantages of adaptive chokes described above can be transferred.
Ausführungsbeispiele der Erfindung sind in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert.Embodiments of the invention are illustrated in the drawings and explained in more detail in the following description.
Claims (7)
dadurch gekennzeichnet, dass die Drossel eine adaptive Drossel (3) ist, bei der zumindest ein Rohr, durch welches das Kühlmittel fließt, ein adaptives Material umfasst, welches bei einer Änderung der Umgebungstemperatur zu einer Änderung des Durchflusses durch das Rohr der adaptiven Drossel (3) führt.Refrigerating machine, comprising a compressor (1), a condenser (2), an evaporator (4) and a throttle, through which a coolant flows for heat transport,
characterized in that the throttle is an adaptive throttle (3) in which at least one pipe through which the coolant flows comprises an adaptive material which, when the ambient temperature changes, changes the flow through the adaptive throttle pipe (3 ) leads.
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DE102018200368.8A DE102018200368A1 (en) | 2018-01-11 | 2018-01-11 | Chiller with adaptive throttle |
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EP3511656A1 true EP3511656A1 (en) | 2019-07-17 |
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EP18211246.6A Withdrawn EP3511656A1 (en) | 2018-01-11 | 2018-12-10 | Cooling machine with adaptive nozzle |
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2018
- 2018-01-11 DE DE102018200368.8A patent/DE102018200368A1/en not_active Withdrawn
- 2018-12-10 EP EP18211246.6A patent/EP3511656A1/en not_active Withdrawn
-
2019
- 2019-01-10 CN CN201910021743.XA patent/CN110030775A/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57187572A (en) * | 1981-05-11 | 1982-11-18 | Sharp Kk | Refrigeration cycle |
JPS59147970A (en) * | 1983-02-09 | 1984-08-24 | 松下冷機株式会社 | Capillary tube for refrigerator |
JPS61237980A (en) * | 1985-04-15 | 1986-10-23 | 株式会社日立製作所 | Air conditioner |
DE102011005786A1 (en) * | 2011-03-18 | 2012-09-20 | BSH Bosch und Siemens Hausgeräte GmbH | The refrigerator |
Also Published As
Publication number | Publication date |
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DE102018200368A1 (en) | 2019-07-11 |
CN110030775A (en) | 2019-07-19 |
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