DE3333903A1 - Defrosting device for a refrigerant evaporator - Google Patents

Defrosting device for a refrigerant evaporator

Info

Publication number
DE3333903A1
DE3333903A1 DE19833333903 DE3333903A DE3333903A1 DE 3333903 A1 DE3333903 A1 DE 3333903A1 DE 19833333903 DE19833333903 DE 19833333903 DE 3333903 A DE3333903 A DE 3333903A DE 3333903 A1 DE3333903 A1 DE 3333903A1
Authority
DE
Germany
Prior art keywords
evaporator
valve
valves
condenser
cooling operation
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
DE19833333903
Other languages
German (de)
Other versions
DE3333903C2 (en
Inventor
Manfred 5020 Frechen Umbach
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DE19833333903 priority Critical patent/DE3333903C2/en
Publication of DE3333903A1 publication Critical patent/DE3333903A1/en
Application granted granted Critical
Publication of DE3333903C2 publication Critical patent/DE3333903C2/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
    • F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
    • F25B47/02—Defrosting cycles
    • F25B47/022—Defrosting cycles hot gas defrosting

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Defrosting Systems (AREA)

Abstract

The evaporator of the invention is of refrigerator plants arranged in a complex, with a compressor, a condenser, several cooling places and, connected to follow these, expansion valves and evaporators, and also with two-way magnetic valves for the passage of heated gaseous refrigerant through the evaporator oppositely to the normal cooling operation, there being inserted, in parallel with the expansion valves, a respective non-return valve which blocks in normal cooling operation, and before the liquefier a feed duct to the two-way magnetic valves and a shut-off valve. The cooling places are provided with defrosting water ducts and troughs. Here a heater is connected in front of each two-way magnetic valve and is formed by a duct which is in heat exchange with the defrosting water ducts and troughs, in order to prevent high temperatures and to prevent the icing of the defrosting water drain troughs and ducts.

Description

Abtaueinrichtung für Kältemittel-VerdampferDefrosting device for refrigerant evaporator

Die Erfindung betrifft eine Abtaueinrichtung für Kältemittel-Verdampfer nach dem Oberbegriff des Patentanspruchs.The invention relates to a defrosting device for refrigerant evaporators according to the preamble of the claim.

Eine derartige Abtaueinrichtung wurde bereits vorgeschlagen, bei der eine sogenannte Heißgas—Abtauung vorgenommen
wird. Hierbei wird überhitztes Druckgas vom Verdichter durch
den Verdampfer geleitet, wobei sowohl die Überhitzungs- als auch die Verflüssigungswärme zum Abtauen abgegeben wird. Bei überhitztem Gas können jedoch Temperaturen von 1100C auftreten, wodurch sich die Aluminiumlamellen, mit denen die Kupferrohre der Verdampfer versehen sind, ablösen können. Außerdem kann hierdurch nicht die Vereisung der Tauwasserablaufrinnen Und —leitungen beseitigt werden.Such a defrosting device has already been proposed in which what is known as hot gas defrosting is carried out
will. Here, superheated compressed gas is passed through by the compressor
the evaporator, whereby both the superheat and the condensation heat are given off for defrosting. In the case of overheated gas, however, temperatures of 110 ° C. can occur, as a result of which the aluminum fins with which the copper pipes of the evaporator are provided can become detached. In addition, the icing of the condensate drainage channels and pipes cannot be removed in this way.

Aufgabe der vorliegenden Erfindung ist es, eine Abtaueinrichtung zu schaffen, die zwar ein schnelles Abtauen der Verdampfer gewährleistet, jedoch so hohe Temperaturen, daß ein Ablösen der Aluminiumlamellen erfolgt, vermeidet und gleichzeitig die Vereisung der Tauwasserablaufrinnen und -leitungen ermöglicht.It is the object of the present invention to create a defrosting device that allows the evaporator to defrost quickly guaranteed, but so high temperatures that a peeling of the aluminum lamellas takes place, avoids and at the same time allows the condensation drainage channels and pipes to freeze.

gelöst.solved.

Diese Aufgabe wird entsprechend dem PatentanspruchThis task is according to the claim

COPYCOPY

Hierdurch wird erzielt, daß das vom Verdichter kommende Gas zunächst enthitzt, d.h. seine Überhitzungswärme abgeführt wird, während gleichzeitig diese Überhitzungswärme zum Abtauen der Tauwasserleitungen und -rinnen verwendet wird, so daß danach dem Verdampfer nur noch sensible Wärme zugeführt wird, die zwar zum schnellen Abtauen des Verdampfers ausreicht, jedoch kein Ablösen der Aluminiumlamellen von dessen Kupferrohren bewirkt.This ensures that the gas coming from the compressor is initially heated, i.e. its overheating is dissipated is, while at the same time this superheat is used to defrost the condensate pipes and channels, so that afterwards only sensible heat is supplied to the evaporator, which is used to defrost the evaporator quickly sufficient, but does not cause the aluminum fins to detach from their copper pipes.

Die Erfindung wird nachstehend anhand des in der beigefügten Abbildung dargestellten Ausführungsbeispiels näher erläutert..The invention is explained in more detail below with reference to the exemplary embodiment shown in the accompanying figure explained ..

Da.s dargestellte Verbundsystem von Kälteanlagen besitz' einen oder mehrere Verdichter 10, von dem oder denen das komprimierte Kältemittel in einen Verflüssiger 11 gelangt, von dem es zu den hintereinander geschalteten Kühlstellen 12 gelangt. Von der jeweiligen Kühlstelle 12 gelangt das Kältemitte jeweils über ein Expansionsventil 13 zu einem Verdampfer 14 und von dort über ein Zweiwege-Magnetventil 15 in Durchlaßrichtung b-c zurück zum Verdichter 10.The composite system of refrigeration systems shown is in possession of one or more compressors 10, of which or which the compressed Refrigerant arrives in a condenser 11, from which it arrives at the cooling points 12 connected one behind the other. The refrigerant reaches an evaporator 14 from the respective cooling point 12 via an expansion valve 13 and from there via a two-way solenoid valve 15 in the forward direction b-c back to compressor 10.

Dem Verflüssiger 11 ist ein Absperrventil 16 in Form eines Magnetventils sowie ein dazu parallel geschalteter Mindestdruckregler 17 vorgeschaltet.. In Strömungsrichtung vor dem Absperrventil 16 zweigt eine Leitung 18 ab, von der jeweils eine Leitung 19 zum Eingang a des Zweiwege-Magnetventils 15 abzweigt. Die Leitungen 19 führen jeweils über einen Enthitzer 20, der aus den Tauwasserablaufrinnen und -leitungen der Kühlstellen t2 gebildet wird. Ferner ist parallel zum Expansionsventil 13 ein Rückschlagventil 21 angeordnet, das in Strömungsrichtung von der Kühlstelle 12 zum Verdampfer 14 sperrt..A shut-off valve 16 in the form of a solenoid valve and a parallel-connected minimum pressure regulator 17 are connected upstream of the condenser 11. The lines 19 each lead via a desuperheater 20 , which is formed from the condensate drainage channels and lines of the cooling points t2. Furthermore, a check valve 21 is arranged parallel to the expansion valve 13, which blocks in the direction of flow from the cooling point 12 to the evaporator 14.

■ Zum Abtauen eines Verdampfers 14 wird das nachgeschal tete Zweiwege-Magnetventil 15 in Richtung b-a geöffnet und■ To defrost an evaporator 14, this is done afterwards tete two-way solenoid valve 15 opened in the direction b-a and

COPYCOPY

und in Richtung b-c geschlossen, ferner wird das Magnetventil 16 geschlossen. Dies kann über eine Uhr oder dergleichen eingeleitet werden. Das- den Verdichter 10 verlassende Heißgas strömt dann über den entsprechenden Abschnitt der Leitung 18 in die Leitung 19 und wird dann im Enthitzer 20 enthitzt, so daß in den abzutauenden Verdampfer 14, der .dann als Verflüssiger arbeitet, nur enthitztes Gas gelangt, dort kondensiert und über das Rückschlagventil 21 der Flüssigkeitsleitung zugeführt wird. Während der Abtauung des abzutauenden Verdampfers 14 wird die Abwärme der übrigen Verdampfer 14, die weiterhin als solche arbeiten, durch Umlenkung des komprimierten Gases durch den Enthitzer ohne Einsatz von Zusatzenergie sowohl zum Abtauen des Verdampfers 14 als auch zum Abtauen der Tauwasserleitungen und -rinnen genutzt, ohne daß in den Verdampfer 14 überhitztes Gas gelangt»and closed in direction bc , furthermore the solenoid valve 16 is closed. This can be initiated via a clock or the like. The hot gas leaving the compressor 10 then flows through the corresponding section of the line 18 into the line 19 and is then heated in the desuperheater 20 so that only desiccated gas reaches the evaporator 14 to be defrosted, which then operates as a condenser, and condenses there and is supplied to the liquid line via the check valve 21. During the defrosting of the evaporator 14 to be defrosted, the waste heat from the remaining evaporators 14, which continue to work as such, is used by diverting the compressed gas through the desuperheater without using additional energy, both for defrosting the evaporator 14 and for defrosting the condensate pipes and channels, without superheated gas getting into the evaporator 14 »

Der Abtauvorgang kann beispielsweise thermostatisch beendet werden, zu welchem Zweck das Zweiwege-Magnetventil in Durchlaßrichtung b-c geöffnet und in Durchlaßrichtung b-a geschlossen und das Magnetventil 16 geöffnet wird, so daß auch das Expansionsventil 13 wieder arbeiteteThe defrosting process can, for example, be terminated thermostatically, for which purpose the two-way solenoid valve open in the forward direction b-c and in the forward direction b-a closed and the solenoid valve 16 is opened, so that the expansion valve 13 also worked again

CopyCopy

Claims (1)

Anspruchclaim Abtaueinrichtung für Kältemittel-Verdampfer von im Verbund angeordneten .Kälteanlagen mit einem Verdichter, einem Verflüssiger, mehreren Kühlstellen und diesen nachgeschalteten Expansionsventilen und Verdampfern sowie mit Zweiwege-Magnetventilen zum Hindurchleiten von erhitztem gasförmigen Kältemittel durch die Verdampfer in Gegenrichtung zum normalen Kühlbetrieb, wobei parallel zu den Expansionsventilen jeweils ein Rückschlagventil, das bei normalem Kühlbetrieb sperrt, und vor dem Verflüssiger eine Zuleitung'zu den Zweiwege-Magnetventilen und ein Absperrventil eingeschaltet sind, und wobei die Kühlstellen mit Tauwasserleitungen und -rinnen versehen sind, dadurch gekennzeichnet, daß jedem Zweiwege-Magnetventil (15) ein Erhitzer (20) vorgeschaltet ist, der aus einer mit Tauwasserleitungen und -rinnen in Wärmetausch stehenden Leitung gebildet wird..Defrosting device for refrigerant evaporator from in the network arranged .refrigeration systems with a compressor, a condenser, several cooling points and these downstream expansion valves and evaporators as well as with two-way solenoid valves for passing heated gaseous refrigerant through the evaporator in the opposite direction to normal Cooling operation, with a check valve parallel to the expansion valves, which blocks during normal cooling operation, and a supply line to the two-way solenoid valves upstream of the condenser and a shut-off valve are switched on, and the cooling points are provided with condensate pipes and channels are characterized in that each two-way solenoid valve (15) is preceded by a heater (20) which consists of a conduit which is in heat exchange with condensation water pipes and channels is formed .. COPY \ COPY \
DE19833333903 1983-09-20 1983-09-20 Defrosting device for refrigerant evaporator Expired DE3333903C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19833333903 DE3333903C2 (en) 1983-09-20 1983-09-20 Defrosting device for refrigerant evaporator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19833333903 DE3333903C2 (en) 1983-09-20 1983-09-20 Defrosting device for refrigerant evaporator

Publications (2)

Publication Number Publication Date
DE3333903A1 true DE3333903A1 (en) 1985-03-28
DE3333903C2 DE3333903C2 (en) 1986-01-23

Family

ID=6209557

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19833333903 Expired DE3333903C2 (en) 1983-09-20 1983-09-20 Defrosting device for refrigerant evaporator

Country Status (1)

Country Link
DE (1) DE3333903C2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19832682C2 (en) * 1998-07-21 2000-10-05 Stiebel Eltron Gmbh & Co Kg Defrosting device for an evaporator of a heat pump or an air conditioner
DE19820133C2 (en) * 1998-05-06 2001-04-19 Stiebel Eltron Gmbh & Co Kg Heat exchanger
CN112524862A (en) * 2019-09-19 2021-03-19 台达电子工业股份有限公司 Freezer and freezer operation method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2823395A1 (en) * 1977-06-03 1978-12-07 Gulf & Western Mfg Co METHOD AND DEVICE FOR DEFROSTING A COOLING SYSTEM
DE3216948A1 (en) * 1981-05-11 1982-12-02 General Electric Co., Schenectady, N.Y. EXTERNAL HEAT EXCHANGER AND HEAT EXCHANGE DEVICE

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2823395A1 (en) * 1977-06-03 1978-12-07 Gulf & Western Mfg Co METHOD AND DEVICE FOR DEFROSTING A COOLING SYSTEM
DE3216948A1 (en) * 1981-05-11 1982-12-02 General Electric Co., Schenectady, N.Y. EXTERNAL HEAT EXCHANGER AND HEAT EXCHANGE DEVICE

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19820133C2 (en) * 1998-05-06 2001-04-19 Stiebel Eltron Gmbh & Co Kg Heat exchanger
DE19832682C2 (en) * 1998-07-21 2000-10-05 Stiebel Eltron Gmbh & Co Kg Defrosting device for an evaporator of a heat pump or an air conditioner
CN112524862A (en) * 2019-09-19 2021-03-19 台达电子工业股份有限公司 Freezer and freezer operation method
US11719474B2 (en) 2019-09-19 2023-08-08 Delta Electronics, Inc. Refrigeration cabinet having two evaporators and operation method of the same

Also Published As

Publication number Publication date
DE3333903C2 (en) 1986-01-23

Similar Documents

Publication Publication Date Title
DE60128244T2 (en) METHOD AND ARRANGEMENT FOR DEFROSTING A STEAM COMPACTER
DE2243784A1 (en) HEAT PUMP AIR CONDITIONING
DE102017211256B4 (en) Refrigeration system for a vehicle with a refrigerant circuit having a heat exchanger
DE202006010412U1 (en) Heat-pump-based device for temperature control has additional feed line to evaporator connected in parallel with expansion valve
DE2638480A1 (en) HEAT PUMP SYSTEM
DE3301303C2 (en)
EP1348920A2 (en) Heat pump for simultaneously cooling and heating
DE3222406A1 (en) METHOD FOR HEAT RECOVERY
EP1462281B1 (en) Air conditiong device with multiple evaporators for a motor vehicle
DE69929165T2 (en) DOUBLE PIPE HEAT EXCHANGER AND HEAT EXCHANGE USING REFRIGERATOR
DE3333903A1 (en) Defrosting device for a refrigerant evaporator
DE68911790T2 (en) Air-cooled absorption air conditioner.
DE2603968A1 (en) Motor vehicle air conditioner refrigerator regulator - supplies bled refrigerant vapour to compressor at constant pressure preventing overheating
DE19832682C2 (en) Defrosting device for an evaporator of a heat pump or an air conditioner
WO2018029371A1 (en) Heat exchanger for use in a heating part of a liquid-air energy storage power plant, heating part, and method for operating such a heat exchanger in such a heating part
DE3216948A1 (en) EXTERNAL HEAT EXCHANGER AND HEAT EXCHANGE DEVICE
EP0719378B1 (en) Process for operating a thermal power station with condensers connected in series on the coolimg water side
DE3311505A1 (en) Heat pump device
DE10103150B4 (en) ventilation
DE102009017765A1 (en) Refrigerator and/or freezer, has control unit designed such that evaporator of refrigerant circuit is temporarily or permanently operated in time period in which another evaporator of refrigerant circuit is defrosted
DE10215587B4 (en) Device for freezing a heat exchanger apparatus
DE3315391C2 (en)
DE2153651C3 (en) Hot gas defrosting device for refrigeration systems
DE2757721A1 (en) Temp. control system - uses heating and cooling circuits coupled by heat pump circuit
DE102018215022B3 (en) Method for operating a refrigeration system for a vehicle with a double-flow heat exchanger and refrigeration system

Legal Events

Date Code Title Description
OP8 Request for examination as to paragraph 44 patent law
D2 Grant after examination
8363 Opposition against the patent
8331 Complete revocation