EP2213964A1 - Dispositif pour réchauffer un agent caloporteur dans un système de chauffage avec une pompe à chaleur - Google Patents

Dispositif pour réchauffer un agent caloporteur dans un système de chauffage avec une pompe à chaleur Download PDF

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Publication number
EP2213964A1
EP2213964A1 EP09450019A EP09450019A EP2213964A1 EP 2213964 A1 EP2213964 A1 EP 2213964A1 EP 09450019 A EP09450019 A EP 09450019A EP 09450019 A EP09450019 A EP 09450019A EP 2213964 A1 EP2213964 A1 EP 2213964A1
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EP
European Patent Office
Prior art keywords
heat exchanger
heat
evaporator
coolant
connection
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.)
Withdrawn
Application number
EP09450019A
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German (de)
English (en)
Inventor
Hermann Gautsch
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
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to EP09450019A priority Critical patent/EP2213964A1/fr
Publication of EP2213964A1 publication Critical patent/EP2213964A1/fr
Withdrawn legal-status Critical Current

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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
    • 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
    • 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
    • F25B2347/00—Details for preventing or removing deposits or corrosion
    • F25B2347/02—Details of defrosting cycles
    • F25B2347/021—Alternate defrosting
    • 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
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/11—Sensor to detect if defrost is necessary

Definitions

  • the invention relates to a device for heating a heat transfer medium for a heating circuit with a heat pump, which comprises a leading via a compressor, a condenser, an expansion valve and an evaporator refrigerant circuit, wherein the evaporator forms a heatable with air as a heat source heat exchanger.
  • Such conventional air-water or air-brine or air-air heat pumps inherit the problem that the heat exchanger can be heated with air as a heat source and acting as an evaporator tends to icing, especially with appropriate weather, which is why such heat exchangers provide means for deicing this heat exchanger are. It is known ( DE 43 21 161 A1 ) to provide a heat storage to a heat pump system that provides heat energy for defrosting the evaporator.
  • a parallel branch with a shut-off valve between the outlet of the evaporator and the input of the compressor, a changeover valve is arranged, through which the refrigerant flow either on the secondary side through the heat storage or directly to Compressor is conductive and wherein for defrosting the evaporator, the shut-off valve open and the switching valve is switched so that the compressor promotes refrigerant through the heat storage and the shut-off valve to the evaporator.
  • the invention has the object, a device for heating a heat carrier, in particular a heat pump to specify, which ensures a constant heat supply to consumers, and possibly makes do without buffer memory.
  • the heat pump according to the invention should thus be able to deliver heat energy equally during a defrosting process of the evaporator.
  • the invention solves this problem in that at least two heatable with air as the heat source and the condenser downstream heat exchanger are provided, the coolant alternately first through the first heat exchanger, via an expansion valve and then via the second heat exchanger or first via the second heat exchanger, via an expansion valve and then passed over the first heat exchanger.
  • two switchable with alternating sequence in series heat exchanger are provided, of which always subcooled the refrigerant downstream of the condenser, which defrosts the possibly iced heat exchanger.
  • the refrigerant residual heat is withdrawn, which could no longer be sensibly supplied to a consumer but still sufficient to defrost the heat exchanger.
  • the coolant is passed through the expansion valve, where it is expanded and cooled further, after which it is fed to the downstream second and acting as an evaporator heat exchanger.
  • the sequence of the two heat exchangers is reversed and then serves the iced heat exchanger for subcooling the coolant and the defrosted heat exchanger as the evaporator.
  • the change between these heat exchangers can, as already mentioned, depending on the degree of icing or depending on an optionally temperature-controlled, timer made.
  • each at least two heat exchangers an icing sensor, in particular a temperature sensor or a pressure sensor, is assigned. If the temperature at the respective heat exchanger provided for evaporating the coolant falls below a predetermined value, this heat exchanger is defrosted by changing the wiring order of the two heat exchangers.
  • an expansion valve may be provided, which acts in both flow directions.
  • the first and the second heat exchangers are connected to one another via a coolant line, in which two expansion valves arranged in parallel and arranged with opposite flow directions are arranged, to which preferably one non-return valve connected in series is assigned.
  • the invention relates to a method for operating a device with the above-described type, which method is characterized in that the coolant, after it has been passed through a condenser, for subcooling the coolant and optionally for deicing a first heat exchanger via the first heat exchanger is, after which the coolant is fed via an expansion valve acting as an evaporator second heat exchanger and wherein the first and the second heat exchanger, in particular for the purpose of alternate deicing of the two heat exchangers, are connected in series between capacitor and compressor in series.
  • This alternately series connection of the Both heat exchangers are carried out in particular as a function of the degree of icing of each acting as an evaporator heat exchanger.
  • a heat pump 1 for heating a heat carrier of a heating circuit comprises a via a compressor 2, a condenser 3, an expansion valve 4 and an evaporator 5 leading refrigerant circuit.
  • the evaporator 5 forms a heatable with air as a heat source heat exchanger.
  • the condenser 3 is used for preheating heat transfer fluid such as water, brine od. Like.
  • the dot-dash line drawn heat exchanger 3 for generating heated exhaust air.
  • At least two heat exchangers 6, 7 which can be heated with heat as the heat source and are arranged downstream of the condenser 3, wherein the coolant alternately first via the first heat exchanger 6 via an expansion valve 4 and then via the second heat exchanger 7 or first via the second heat exchanger 7, about an expansion valve 4 and then passed over the first heat exchanger 6.
  • the first and the second heat exchanger 6, 7 each upstream of a switching valve 8, 9, which is connected via a connection to the condenser 3, to the compressor 2 and to the associated heat exchanger 6, 7, wherein the heat exchangers 6, 7 are connected in series with these changeover valves 8, 9 in alternating sequence.
  • the switching valves may be associated with a control device, not shown in detail, which alternately connects the condenser connection and the heat exchanger connection or the heat exchanger connection and the compressor connection.
  • a switching valve 8, 8 ', 9, 9' is provided, wherein the heat exchanger downstream switching valve 8 ', 9' in each case to the other heat exchanger 6, 7 upstream switching valve 8, 9 is connected. This measure ensures that the heat exchangers 6, 7 are always flowed through by the refrigerant in the same flow direction.
  • the first and second heat exchangers 6, 7 are connected to one another via a coolant line 10, in which two expansion valves 11, 12 arranged in parallel with one another and arranged with opposite flow directions are arranged. Each of these expansion valves is associated with a series-connected check valve 13.
  • the compressed and heated by the compressor 2 refrigerant from the medium heating consumers (heating water, air, brine,. Like.)
  • the condenser 3 is cooled and liquefied.
  • the cooled and liquefied refrigerant flows via a diverter valve 8, 9 to the heat exchanger 6, 7 which operates as a subcooler.
  • the temperature of the refrigerant flowing out of the condenser is sufficient to defrost the frost (ice) built up on the evaporator.
  • the refrigerant is undercooled, which increases the cooling capacity of the heat pump. Subsequently, the refrigerant is introduced via an expansion valve in the other heat exchanger 6, 7 and evaporated there by the energy of the air.
  • the vaporized refrigerant is then fed back to the compressor 2. If the heat exchanger acting as an evaporator ices up, the order of the two heat exchangers 6, 7 is exchanged and becomes the now iced heat exchanger as a subcooler and the de-iced heat exchanger as the evaporator.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
EP09450019A 2009-01-28 2009-01-28 Dispositif pour réchauffer un agent caloporteur dans un système de chauffage avec une pompe à chaleur Withdrawn EP2213964A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP09450019A EP2213964A1 (fr) 2009-01-28 2009-01-28 Dispositif pour réchauffer un agent caloporteur dans un système de chauffage avec une pompe à chaleur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP09450019A EP2213964A1 (fr) 2009-01-28 2009-01-28 Dispositif pour réchauffer un agent caloporteur dans un système de chauffage avec une pompe à chaleur

Publications (1)

Publication Number Publication Date
EP2213964A1 true EP2213964A1 (fr) 2010-08-04

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP09450019A Withdrawn EP2213964A1 (fr) 2009-01-28 2009-01-28 Dispositif pour réchauffer un agent caloporteur dans un système de chauffage avec une pompe à chaleur

Country Status (1)

Country Link
EP (1) EP2213964A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017161172A (ja) * 2016-03-10 2017-09-14 富士電機株式会社 冷却装置

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5747176A (en) * 1980-09-02 1982-03-17 Okamura Corp Method of and apparatus for cooling air curtain type refrigerated display case
US4741171A (en) * 1986-03-15 1988-05-03 Sanden Corporation Refrigerated display cabinet
DE4321161A1 (de) 1993-06-25 1995-01-05 Stiebel Eltron Gmbh & Co Kg Wärmepumpenanlage
FR2778970A1 (fr) * 1998-05-25 1999-11-26 Austria Haus Technik Aktienges Procede et dispositif de degivrage par condensation et/ou sous-refroidissement de fluide frigorigene
DE19832682A1 (de) 1998-07-21 2000-01-27 Stiebel Eltron Gmbh & Co Kg Abtaueinrichtung für einen Verdampfer einer Wärmepumpe oder eines Klimageräts
EP1577624A2 (fr) * 2004-03-15 2005-09-21 Stanislav Mach Pompe à chaleur
DE102005018125A1 (de) * 2005-04-20 2006-10-26 Bernhard Wenzel Kältemittelkreislauf für eine Wärmepumpe

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5747176A (en) * 1980-09-02 1982-03-17 Okamura Corp Method of and apparatus for cooling air curtain type refrigerated display case
US4741171A (en) * 1986-03-15 1988-05-03 Sanden Corporation Refrigerated display cabinet
DE4321161A1 (de) 1993-06-25 1995-01-05 Stiebel Eltron Gmbh & Co Kg Wärmepumpenanlage
FR2778970A1 (fr) * 1998-05-25 1999-11-26 Austria Haus Technik Aktienges Procede et dispositif de degivrage par condensation et/ou sous-refroidissement de fluide frigorigene
DE19832682A1 (de) 1998-07-21 2000-01-27 Stiebel Eltron Gmbh & Co Kg Abtaueinrichtung für einen Verdampfer einer Wärmepumpe oder eines Klimageräts
EP1577624A2 (fr) * 2004-03-15 2005-09-21 Stanislav Mach Pompe à chaleur
DE102005018125A1 (de) * 2005-04-20 2006-10-26 Bernhard Wenzel Kältemittelkreislauf für eine Wärmepumpe

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017161172A (ja) * 2016-03-10 2017-09-14 富士電機株式会社 冷却装置

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