DE2627836A1 - Compression type refrigeration equipment - has variable heating resistance upstream of throttle changing over to high value - Google Patents

Compression type refrigeration equipment - has variable heating resistance upstream of throttle changing over to high value

Info

Publication number
DE2627836A1
DE2627836A1 DE19762627836 DE2627836A DE2627836A1 DE 2627836 A1 DE2627836 A1 DE 2627836A1 DE 19762627836 DE19762627836 DE 19762627836 DE 2627836 A DE2627836 A DE 2627836A DE 2627836 A1 DE2627836 A1 DE 2627836A1
Authority
DE
Germany
Prior art keywords
chamber
throttle
high value
throttle device
refrigeration equipment
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
Application number
DE19762627836
Other languages
German (de)
Other versions
DE2627836B2 (en
DE2627836C3 (en
Inventor
Bent Karll
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Danfoss AS
Original Assignee
Danfoss AS
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Danfoss AS filed Critical Danfoss AS
Priority to DE2627836A priority Critical patent/DE2627836C3/en
Priority to CA265,124A priority patent/CA1046784A/en
Priority to GB49429/76A priority patent/GB1562627A/en
Priority to FR7635817A priority patent/FR2333209A1/en
Priority to ES453739A priority patent/ES453739A1/en
Priority to IT69857/76A priority patent/IT1074293B/en
Priority to NO764091A priority patent/NO142591C/en
Priority to SE7614682A priority patent/SE7614682L/en
Priority to BR7608781A priority patent/BR7608781A/en
Priority to DK167577A priority patent/DK167577A/en
Priority to JP7095877A priority patent/JPS53460A/en
Publication of DE2627836A1 publication Critical patent/DE2627836A1/en
Publication of DE2627836B2 publication Critical patent/DE2627836B2/en
Application granted granted Critical
Publication of DE2627836C3 publication Critical patent/DE2627836C3/en
Expired legal-status Critical Current

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)

Abstract

The compression-type refrigeration equipment has a throttle between the condenser and the evaporator. It has a heating resistance working with the capillary tube and connected in circuit from time to time. A chamber is provided (8) upstream of part at least (9a) of the throttle, and the resistance (10) is mounted in the chamber and of the type changing over from a low resistance value to a high value when the temperature rises above a range between the vapourisation temperature of the refrigerating medium corresponding to the pressure in the chamber and the carbonisation temperature of the low-temperature oil.

Description

Kompressor-Kälteanlage Zusatz zu Patent ... (Patentanmeldung P 25 53 562.0-13)Compressor refrigeration system addendum to patent ... (patent application P 25 53 562.0-13)

Die vorliegende Erfindung bezieht sich auf eine Kompressor-Kälteanlage mit zwischen Kondensator und Verdampfer geschalteter Drosselvorrichtung und dieser zugeordnetem, zeitweise einschaltbaren elektrischen 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 überschreiten eines Temp era tur-Ap\-//' bereichs 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 a throttle device connected between the condenser and the evaporator and an associated throttle device that can be switched on at times electrical heating resistor, wherein at least a part of the throttle device is preceded by a chamber and wherein the electrical heating resistor ^ a arranged in the chamber PTC resistance is that when a temp era tur-Ap \ - // 'is exceeded range between the '"" assigned to the pressure in the chamber Evaporation temperature of the refrigerant and the coking temperature of the refrigerant oil from a low to a high resistance value transforms.

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 Flüssigleit 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 conducts under the same pressure conditions through a capillary tube section on the one hand liquid refrigerant and on the other hand refrigerant vapor, the pro The mass of the liquid that passes through it in a unit of time is about three to four times as large as that of the steam. This already results a very good shut-off effect that can be used, for example, for defrosting.

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 the part of the throttle device downstream of the chamber is replaced by an axially short throttle element, such as a fixed nozzle or aperture.

709852/0337709852/0337

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 KapillarrohrabSchnitts 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.With such short throttle elements, the mass of the liquid passing through per unit of time is six to eight times greater than that of steam. All other things being equal, only half of the flow occurs with such a throttle element Vapor compared to a capillary tube section designed to be equivalent with respect to the liquid. Consequently the result is an even better shut-off effect, as a result of which less steam flows into the evaporator. Means less steam less energy, both with regard to the evaporation by means of the PTC resistor and for the subsequently 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.If a part of the throttle device is also arranged in front of the chamber if what is not absolutely necessary, this can optionally be a capillary tube section or also an axially short one Throttle element, such as 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 is also in all subclaims of the main patent applicable.

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 the circuit diagram of a Compressor refrigeration system.

Die Schaltung weist im Kreislauf einen Kompressor 1, 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,The circuit has a compressor 1, one in the circuit Condenser 2 and an evaporator 3. The latter is housed in a cold room 4. Whose temperature is through a thermostat 5 monitors, which switches the compressor 1 on and off as required. Between condenser 2 and evaporator 3 a throttle device 6 is arranged, which consists of a fixed nozzle 7, a chamber 8 and a downstream diaphragm 9 consists. 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,

709852/0337709852/0337

in einer für den Normalbetrieb bemessenen Menge entspannt in den Verdampfer 3 gelangt und dort unter Wärmeaufnahme verdampft.reaches the evaporator 3 in a relaxed amount measured 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 the form of a PTC resistor 10, which is connected to mains terminals via a switch 11 12 can be placed. The switch 11 is operated by a timer 13 which is set at predetermined intervals, for example every 72 hours, initiates a defrosting period of e.g. one 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 pressure from chamber 8 per unit of time is the same The outflowing mass of the refrigerant is six to eight times smaller than in normal operation. As a result, the desired one results Blocking effect, which is greater here than when using a capillary tube section. The steam is hot enough to make the frost defrost on the evaporator 3.

Wegen weiterer Einzelheiten wird auf das Hauptpatent verwiesen.Reference is made to the main patent for further details.

709852/0337709852/0337

Claims (2)

PatentansprücheClaims ( Λ J Kompressor-Kälteanlage mit zwischen Kondensator und Verdampfer geschalteter Drosselvorrichtung und dieser zugeordnetem, zeitweise einschaltbaren elektrischen Heizwiderstand, wobei wenigstens einem Teil der Drosselvorrichtung eine Kammer vorgeschaltet ist und wobei der elektrische Heiz- (Λ J Compressor-refrigeration system with a throttle device connected between the condenser and the evaporator and an electrical heating resistor assigned to it, which can be switched on at times, with at least part of the throttle device being preceded by a chamber and the electric heating widerstand ein in der Kammer amgeordneter PTC-Widerstandresisted a PTC resistor arranged in the chamber am .st, der beim -Äierschreiten eines Temperaturbereichs zwischen.st, which is when a temperature range between 3ier dem Druck in der Kammer zugeordneten Verdampfungstempera- :jjjj tür des Kältemittels und der Verkokungstemperatur des Kälte-51s von einem niedrigen auf einen hohen Widerstandswert —ibergeht, nach einem der Ansprüche 1 bis 7 des Patents (Patentanmeldung P 25 53 562.0-13), dadurch gekennzeichnet, daß der der Kammer (8) nachgeschaltete Teil der Drosselvorrichtung (6) durch ein axial kurzes Drosselelement, wie feste Düse oder Blende (9), gebildet ist.3ier the pressure in the chamber associated Verdampfungstempera-: yyyy door of the refrigerant and the coking temperature of the refrigerant-51s from a low -ibergeht to a high resistance value according to one of claims 1 to 7 of the patent (Patent Application P 25 53 562.0-13), characterized in that the part of the throttle device (6) connected downstream of the chamber (8) is formed by an axially short throttle element, such as a fixed nozzle or diaphragm (9). 2. Kompressor-Kälteanlage nach Anspruch 1, dadurch gekennzeichnet, daß auch ein der Kammer (8) vorgeschalteter Teil der Drosselvorrichtung (6) durch ein axial kurzes Drosselelement, wie feste Düse (7) oder Blende, gebildet ist.2. Compressor refrigeration system according to claim 1, characterized in that that also a part of the throttle device (6) connected upstream of the chamber (8) by an axially short throttle element, like a fixed nozzle (7) or orifice. 709852/0337709852/0337
DE2627836A 1975-11-28 1976-06-22 Compressor refrigeration system Expired DE2627836C3 (en)

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 true DE2627836A1 (en) 1977-12-29
DE2627836B2 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)

* Cited by examiner, † Cited by third party
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

Also Published As

Publication number Publication date
DE2627836B2 (en) 1978-10-19
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