DE2627836B2 - Compressor refrigeration system - Google Patents
Compressor refrigeration systemInfo
- Publication number
- DE2627836B2 DE2627836B2 DE2627836A DE2627836A DE2627836B2 DE 2627836 B2 DE2627836 B2 DE 2627836B2 DE 2627836 A DE2627836 A DE 2627836A DE 2627836 A DE2627836 A DE 2627836A DE 2627836 B2 DE2627836 B2 DE 2627836B2
- Authority
- DE
- Germany
- Prior art keywords
- chamber
- throttle device
- refrigeration system
- throttle
- compressor refrigeration
- 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.)
- Granted
Links
Classifications
-
- 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
- F25B5/02—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity arranged in parallel
-
- 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
-
- 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
- F25B49/00—Arrangement or mounting of control or safety devices
-
- 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
- F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
- F25D21/002—Defroster control
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Defrosting Systems (AREA)
- Compressor (AREA)
- Lubricants (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
Description
Die vorliegende Erfindung bezieht sich auf eine Kompressor-Kälteanlage mit zwischen Kondensator und Verdampfer geschalteter Drosselvorrichtung und dieser zugeordnetem, zeitweise einschaltbarem elektrischem Heizwiderstand, wobei wenigstens einem Teil der Drosselvorrichtung eine Kammer vorgeschaltet ist und wobei der elektrische Heizwiderstand ein in der Kammer angeordneter PTC-Widerstand ist, der beim Durchschreiten eines Temperaturbereichs zwischen der dem Druck in der Kammer zugeordneten Verdampfungstemperatur des Kältemittels und der Verkokungstemperatur des Kälteöls von einem niedrigen auf einen hohen Widerstandswert übergeht.The present invention relates to a compressor refrigeration system with an intermediate condenser and evaporator switched throttle device and this associated, temporarily switchable electrical Heating resistor, at least a part of the throttle device being preceded by a chamber and wherein the electrical heating resistor is a PTC resistor arranged in the chamber, which at Passing through a temperature range between the evaporation temperature assigned to the pressure in the chamber the refrigerant and the coking temperature of the refrigerant oil from a low to one high resistance value.
Beim Hauptpatent bestehen die Teile der Drosselvorrichtung aus Kapillarrohrabschnitten. Leitet man unter gleichen Druckverhältnissen durch einen Kapillarrohrabschnitt zum einen flüssiges Kältemittel und zum anderen Kältemitteldampf, so ist die pro Zeiteinheit hindurchtretende Masse der Flüssigkeit etwa drei bis vier Mal so groß wie diejenige des Dampfes. Dies ergibt bereits einen sehr guten, z. B. für das Abtauen ausnutzbaren Absperreffekt.In the main patent, the parts of the throttle device consist of capillary tube sections. One leads under the same pressure conditions through a capillary tube section on the one hand liquid refrigerant and on the other hand other refrigerant vapor, the mass of the liquid passing through per unit of time is about three to four times as large as that of steam. This already gives a very good, e.g. B. for defrosting exploitable blocking effect.
Erfindungsgemäß kann der Dampfverbrauch noch weiter herabgesetzt werden, wenn der der Kammer nachgeschaltete Teil der Drosselvorrichtung durch ein axial kurzes Drosselelement, wie feste Düse oder Blende, gebildet ist.According to the invention, the steam consumption can be reduced even further if that of the chamber downstream part of the throttle device by an axially short throttle element, such as a fixed nozzle or Aperture, is formed.
Bei derartigen kurzen Drosselelementen ist die pro Zeiteinheit hindurchtretende Masse der Flüssigkeit sechs bis acht Mal größer als diejenige des Dampfes. Unter sonst gleichen Verhältnissen tritt daher bei einem solchen Drosselelement nur die Hälfte des Dampfes im Vergleich zu einem bezüglich der Flüssigkeit gleichwertig ausgelegten Kapillarrohrabschnitt hindurch. Infolgedessen ergibt sich ein noch besserer Absperreffekt, aufgrund dessen weniger Dampf in den Verdampfer abströmt. Weniger Dampf bedeutet weniger Energie, und zwar sowohl bezüglich der Verdampfung mittels des PTC-Widerstandes als auch für die anschließend notwendige Verdichtung.In the case of such short throttle elements, the mass of the liquid which passes through per unit of time is six to eight times larger than that of steam. All other things being equal, therefore, one occurs such a throttle element only half the vapor compared to one equivalent in terms of liquid designed capillary tube section therethrough. As a result, there is an even better shut-off effect, as a result, less steam flows into the evaporator. Less steam means less energy, both with regard to the evaporation by means of the PTC resistor and for the subsequent necessary compression.
Sofern auch vor der Kammer ein Teil der Drosselvorrichtung angeordnet wird, was nicht unbedingt notwendig ist, kann dies wahlweise ein Kapillarrohrabschnitt oder ebenfalls ein axial kurzes Drosselelement, wie feste Düse oder Blende, sein. Letzteres empfiehlt sich aus Gründen eines einheitlichen Aufbaus.Provided that a part of the throttle device is also arranged in front of the chamber, which is not necessarily the case is necessary, this can either be a capillary tube section or an axially short throttle element, like a fixed nozzle or orifice. The latter is recommended for reasons of a uniform structure.
Die getroffene Maßnahme, nämlich der Ersatz zumindest des nachgeschalteten Kapillarrohrabschnitts durch ein axial kurzes Drosselelement, ist auch bei allen Unteransprüchen des Hauptpatents anwendbar.The measure taken, namely the replacement of at least the downstream capillary tube section by an axially short throttle element, can also be used for all subclaims of the main patent.
In der Zeichnung ist ein Ausführungsbeispiel der Erfindung schematisch dargestellt. Es handelt sich um das Schaltbild einer Kompressor-Kälteanlage.An exemplary embodiment of the invention is shown schematically in the drawing. It is a matter of the circuit diagram of a compressor refrigeration system.
Die Schaltung weist im Kreislauf einen Kompressor I1 einen Kondensator 2 und einen Verdampfer 3 auf. Letzterer ist in einem Kühlraum 4 untergebracht. Dessen Temperatur wird durch einen Thermostaten 5 überwacht, der den Kompressor 1 bei Bedarf ein- und ausschaltet. Zwischen Kondensator 2 und Verdampfer 3 ist eine Drosselvorrichtung 6 angeordnet, die aus einer festen Düse 7, einer Kammer 8 und einer nachgeschalteten Blende 9 besteht. Die feste Düse 7 und die Blende 9 sind bezüglich ihres Drosselwiderstandes derart bemessen, daß flüssiges Kältemittel aus dem Kondensator 2, das unter dem Verdichtungsdruck steht, in einer für den Normalbetrieb bemessenen Menge entspannt in den Verdampfer 3 gelangt und dort unter Wärmeaufnahme verdampft.The circuit has a compressor I 1, a condenser 2 and an evaporator 3 in the circuit. The latter is housed in a cold room 4. Its temperature is monitored by a thermostat 5, which switches the compressor 1 on and off as required. A throttle device 6, which consists of a fixed nozzle 7, a chamber 8 and a downstream diaphragm 9, is arranged between the condenser 2 and the evaporator 3. The fixed nozzle 7 and the diaphragm 9 are dimensioned with regard to their throttle resistance such that liquid refrigerant from the condenser 2, which is under the compression pressure, reaches the evaporator 3 in an amount dimensioned for normal operation and evaporates there while absorbing heat.
In der Kammer 8 befindet sich ein Heizwiderstand in der Form eines PTC-Widerstandes 10, der über einen Schalter 11 an Netzklemmen 12 gelegt werden kann. Der Schalter 11 wird durch eine Schaltuhr 13 betätigt, die in vorgegebenen Abständen, z. B. alle 72 Stunden, eine Abtauperiode von z. B. einer Stunde einleitet. Durch den PTC-Widerstand wird das Kältemittel in der Kammer 8 derart beheizt, daß es verdampft, aber noch keine Verkokung stattfindet.In the chamber 8 there is a heating resistor in in the form of a PTC resistor 10, which can be connected to mains terminals 12 via a switch 11. The switch 11 is operated by a timer 13 which is set at predetermined intervals, for. B. every 72 hours, a defrosting period of z. B. initiates an hour. The refrigerant in the Chamber 8 heated so that it evaporates, but no coking takes place.
Der Dampf hat ein wesentlich größeres Volumen. Unter gleichen Druckverhältnissen ist die aus der Kammer 8 pro Zeiteinheit abströmende Masse des Kältemittels sechs bis acht Mal kleiner als im Normalbetrieb. Infolgedessen ergibt sich der gewünschte Absperreffekt, der hier größer ist als bei Verwendung eines Kapillarrohrabschnitts. Der Dampf ist heiß genug, um den Reif auf dem Verdampfer 3 abzutauen.The steam has a much larger volume. The one from the is under the same pressure Chamber 8 mass of refrigerant flowing out per unit of time is six to eight times smaller than in the Normal operation. This results in the desired blocking effect, which is greater here than when it is used a capillary tube section. The steam is hot enough to defrost the frost on the evaporator 3.
Hierzu 1 Blatt Zeichnungen1 sheet of drawings
Claims (2)
Priority Applications (11)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2627836A DE2627836C3 (en) | 1976-06-22 | 1976-06-22 | Compressor refrigeration system |
CA265,124A CA1046784A (en) | 1975-11-28 | 1976-11-08 | Compressor refrigeration plant |
GB49429/76A GB1562627A (en) | 1975-11-28 | 1976-11-26 | Refrigerating systems |
FR7635817A FR2333209A1 (en) | 1975-11-28 | 1976-11-26 | COMPRESSION COOLING SYSTEM |
ES453739A ES453739A1 (en) | 1976-06-22 | 1976-11-27 | Compression refrigeration machine |
NO764091A NO142591C (en) | 1976-06-22 | 1976-11-30 | KOMPRESSOR-KJOELEANLEGG. |
IT69857/76A IT1074293B (en) | 1976-06-22 | 1976-11-30 | COMPRESSOR REFRIGERATOR SYSTEM |
SE7614682A SE7614682L (en) | 1976-06-22 | 1976-12-29 | COMPRESSOR EQUIPPED COOLING SYSTEM |
BR7608781A BR7608781A (en) | 1976-06-22 | 1976-12-29 | COLD INSTALLATION WITH COMPRESSOR |
DK167577A DK167577A (en) | 1976-06-22 | 1977-04-15 | COMPRESSOR COOLING SYSTEM |
JP7095877A JPS53460A (en) | 1976-06-22 | 1977-06-15 | Compression refrigeration machine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2627836A DE2627836C3 (en) | 1976-06-22 | 1976-06-22 | Compressor refrigeration system |
Publications (3)
Publication Number | Publication Date |
---|---|
DE2627836A1 DE2627836A1 (en) | 1977-12-29 |
DE2627836B2 true DE2627836B2 (en) | 1978-10-19 |
DE2627836C3 DE2627836C3 (en) | 1979-06-21 |
Family
ID=5981097
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE2627836A Expired DE2627836C3 (en) | 1975-11-28 | 1976-06-22 | Compressor refrigeration system |
Country Status (8)
Country | Link |
---|---|
JP (1) | JPS53460A (en) |
BR (1) | BR7608781A (en) |
DE (1) | DE2627836C3 (en) |
DK (1) | DK167577A (en) |
ES (1) | ES453739A1 (en) |
IT (1) | IT1074293B (en) |
NO (1) | NO142591C (en) |
SE (1) | SE7614682L (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0719154A (en) * | 1991-04-09 | 1995-01-20 | Yukio Nagai | Electric power generation utilizing sea level change by low-high tide and principle of buoyancy |
-
1976
- 1976-06-22 DE DE2627836A patent/DE2627836C3/en not_active Expired
- 1976-11-27 ES ES453739A patent/ES453739A1/en not_active Expired
- 1976-11-30 NO NO764091A patent/NO142591C/en unknown
- 1976-11-30 IT IT69857/76A patent/IT1074293B/en active
- 1976-12-29 SE SE7614682A patent/SE7614682L/en not_active Application Discontinuation
- 1976-12-29 BR BR7608781A patent/BR7608781A/en unknown
-
1977
- 1977-04-15 DK DK167577A patent/DK167577A/en active IP Right Grant
- 1977-06-15 JP JP7095877A patent/JPS53460A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
DE2627836A1 (en) | 1977-12-29 |
BR7608781A (en) | 1981-04-28 |
DE2627836C3 (en) | 1979-06-21 |
SE7614682L (en) | 1977-12-23 |
JPS5716302B2 (en) | 1982-04-03 |
NO142591B (en) | 1980-06-02 |
DK167577A (en) | 1977-12-23 |
NO764091L (en) | 1977-12-23 |
JPS53460A (en) | 1978-01-06 |
NO142591C (en) | 1980-09-10 |
ES453739A1 (en) | 1977-11-01 |
IT1074293B (en) | 1985-04-20 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OD | Request for examination | ||
C3 | Grant after two publication steps (3rd publication) | ||
8340 | Patent of addition ceased/non-payment of fee of main patent |