FR2508143A1 - Deicing circuit for heat pump - has internal circulation loop heating all iced surfaces and in communication with condenser and evaporator of heat exchanger - Google Patents
Deicing circuit for heat pump - has internal circulation loop heating all iced surfaces and in communication with condenser and evaporator of heat exchanger Download PDFInfo
- Publication number
- FR2508143A1 FR2508143A1 FR8112065A FR8112065A FR2508143A1 FR 2508143 A1 FR2508143 A1 FR 2508143A1 FR 8112065 A FR8112065 A FR 8112065A FR 8112065 A FR8112065 A FR 8112065A FR 2508143 A1 FR2508143 A1 FR 2508143A1
- Authority
- FR
- France
- Prior art keywords
- circuit according
- exchanger
- condenser
- compartments
- communication
- 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- Withdrawn
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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
- F25D21/06—Removing frost
- F25D21/12—Removing frost by hot-fluid circulating system separate from the refrigerant system
-
- 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
- F25B30/00—Heat pumps
- F25B30/06—Heat pumps characterised by the source of low potential heat
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/52—Heat recovery pumps, i.e. heat pump based systems or units able to transfer the thermal energy from one area of the premises or part of the facilities to a different one, improving the overall efficiency
Abstract
Description
L'invention se rapporte à un circuit de dégivrage et à ses moyens associés pour pompe à chaleur comportant au moins un échangeur à trois fluides,
ün des intérêts supplémentaires d'une pompe à chaleur employée en chauffage puisant ses calories sur l'air extérieur est de pouvoir récupérer les calories au-delà du seuil de givrage. Cet intérêt s'avère d'autant plus important que la température du fluide frigorigène est basse.The invention relates to a de-icing circuit and its associated means for a heat pump comprising at least one three-fluid exchanger,
The additional interest of a heat pump used in heating, drawing its calories from the outside air, is to recover calories beyond the icing threshold. This interest is all the more important that the temperature of the refrigerant is low.
Le givrage apparaît à des températures faiblement positives situées entre OOC et SOC. Dès les premiers depôts, le givre fait baisser progressivement le rendement de la pompe à chaleur, Le rendement. chute ensuite brutalement dès que la structure de l'évaporateur est prise dans la glace. En effet, la carapace de glace réduit considérablement l'échange, formant une véritable barrière thermique,
II convient alors de dégivrer si l'on veut garder un rendement acceptable sur une plage de températures s'étendant en dessous de zéro degré Celsius.Icing appears at low positive temperatures between OOC and SOC. From the first deposits, the frost progressively lowers the efficiency of the heat pump, the yield. then fall suddenly as soon as the structure of the evaporator is caught in the ice. Indeed, the ice shell reduces the exchange considerably, forming a real thermal barrier,
It is then necessary to defrost if one wants to keep an acceptable yield over a range of temperatures extending below zero degrees Celsius.
A ce but, diverses solutions sont utilisées actuellement. For this purpose, various solutions are currently used.
la plus classique consiste à procéder par inversion de cycle en faisant jouer à l'évaporateur, à intervalles réguliers, le rôle de condenseur et inversement, ceci pendant une courte durée qui suffit à faire fondre la glace. the most traditional is to proceed by inversion cycle by making the evaporator play at regular intervals, the role of condenser and vice versa, this for a short time that is sufficient to melt the ice.
Cette solution nécessite l'interposition sur le circuit du fluide frigorigène de divers composants tels que clapets, vannes, qui augmentent le coût de l'appareil et diminuent corrélativement sa fiabilité. This solution requires the interposition on the refrigerant circuit of various components such as valves, valves, which increase the cost of the device and correspondingly reduce its reliability.
De plus, I'inversion multiplie les arrêts supplémentaires du compresseur, sources de perte de rendement et de mauvais fonctionnement. In addition, the inversion multiplies the additional stops of the compressor, sources of yield loss and malfunction.
L'invention a pour but de remédier à ces inconvénients en proposant un circuit de dégivrage qui ne présente aucune liaison de commande de fonctionnement avec le compresseur et qui évite l'emploi des compléments de composants nécessaire au dégivrage dans le cas d'inversion de cycle sur le circuit frigorifique. The object of the invention is to remedy these drawbacks by proposing a de-icing circuit which has no operating control link with the compressor and which avoids the use of the additional components required for de-icing in the case of cycle reversal. on the refrigerant circuit.
L'invention ne modifie, par conséquent, en aucune façon le fonctionnement propre du circuit frigorifique. The invention therefore does not alter in any way the proper operation of the refrigerant circuit.
A cet effet, le circuit de dégivrage selon l'invention se montre remarquable par une communication sélective à chacune des extrémités du circuit d'apport et du circuit de restitution de manière à constituer, à l'intérieur du caisson, une boucle de circulation interne active entre le condenseur et l'évaporateursur l'air. For this purpose, the deicing circuit according to the invention is remarkable by a selective communication at each end of the supply circuit and the feedback circuit so as to constitute, inside the box, an internal circulation loop active between the condenser and the evaporator on the air.
Cette caractéristique technique présente de multiples avantages dont les principaux sont indiqués c i-après
Gain en fiabilité et en coût en raison de la simplifi
cation du circuit.This technical characteristic has many advantages, the main ones of which are indicated below.
Gain in reliability and cost due to simplification
cation of the circuit.
Gain en rendement car on arrête le compresseur pendant
la phase de dégivrage et on utilise, pour le dégivrage,
une énergie déjà multipliée par le facteur de performance
de l'appareil.Gain in efficiency because we stop the compressor during
the defrosting phase and we use, for defrosting,
an energy already multiplied by the performance factor
of the device.
Diminution du temps de dégivrage car l'air chaud agit
directement sur toute la surface du support recouvert
de givre et non pas de l'intérieur comme en inversion
de cycle,
D'autres caractéristiques techniques et avantages apparaîtront dans la description qui suit, effectuée à titre d'exemple non limitatif sur un mode d'exécution de l'invention en référence aux dessins accompagnants dans lesquels
la figure 1 est une vue en coupe verticale représentant
schématiquement les organes et le caisson d'une pompe
à chaleur puisant l'énergie dans l'air extérieur avec
restitution sur circuit d'eau uniquement, présentant
le circuit de dégivrage selon l'invention.Reduced defrosting time because hot air acts
directly on the entire surface of the covered support
frost and not from the inside as in inversion
cycle,
Other technical characteristics and advantages will appear in the description which follows, given by way of nonlimiting example in one embodiment of the invention with reference to the accompanying drawings in which:
FIG. 1 is a vertical sectional view representing
schematically the organs and the box of a pump
to heat drawing energy into the outside air with
restitution on water circuit only, presenting
the deicing circuit according to the invention.
la figure 2 est la même vue en coupe qu'en figure 1
dans le cas d'une pompe mixte avec puisage et restitution
sur deux fluides air et eau.Figure 2 is the same sectional view as in Figure 1
in the case of a mixed pump with drawing and return
on two fluids air and water.
la figure 3 est une vue schématique détaillée de l'ap
pu cation de l'invention siir le circuit frigorifique
à trois fluides.FIG. 3 is a detailed schematic view of the ap
pu cation of the invention siir the refrigerant circuit
with three fluids.
Le circuit de dégivrage selon l'invention trouve sa principale application dans le domaine des pompes à chaleur. Il a été conçu plus particulièrement pour des pompes à chaleur à échangeur trois fluides dont le circuit d'apport travaille sur l'air extérieur. The deicing circuit according to the invention finds its main application in the field of heat pumps. It has been designed more particularly for heat pumps with three-fluid exchanger whose supply circuit works on the outside air.
L'invention concerne une modilication du circuit intérieur d'un caisson 1 d'une pompe à chaleur à échangeur trois fluides. The invention relates to a modification of the internal circuit of a caisson 1 of a heat pump with a three-fluid exchanger.
Ce caisson comprend un circuit de récupération 2 traversant un compartiment de récupération 3 renfermant ltéchangeur-évaporateur 4, de préférence du type échangeur AIR/EAU, et une turbine 5 prévue pour le rejet de l'air refroidi et la circulation de l'air en régime de dégivrage. This box comprises a recovery circuit 2 passing through a recovery compartment 3 containing the exchanger-evaporator 4, preferably of the AIR / WATER exchanger type, and a turbine 5 provided for the rejection of the cooled air and the circulation of the air. defrosting regime.
Ce compartiment est délimité par les parois du caisson et une séparation interne 6 thermiquement isolante. This compartment is delimited by the walls of the box and an internal separation 6 thermally insulating.
De même, le caisson comprend un circuit de restitution 7 traversant un compartiment de restitution 8 fermé par des parois isolantes dont la séparation 6, compartiment renferment un échangeur-condenseur, par exemple à ailettes et tube en cuivre, du type à trois fluides. Similarly, the box comprises a feedback circuit 7 passing through a recovery compartment 8 closed by insulating walls whose separation 6, compartment contain an exchanger-condenser, for example finned and copper tube, the three-fluid type.
Le compartiment de restitution 8 reste totalement fermé dans le cas d'une restitution sur l'eau uniquement. Il comporte des ouvertures de communication avec l'extérieur dans le cas d'une restitution mixte simultanée sur les deux fluides air et eau. Le passage ainsi formé constitue le circuit de restitution sur l'air. The refund compartment 8 remains totally closed in the case of restitution on the water only. It has communication openings with the outside in the case of a simultaneous mixed release on both air and water fluids. The passage thus formed constitutes the feedback circuit on the air.
L'invention a pour but de prévoir- à chaque extrémité des compartiments de récupération 3 et de restitution 8 une communication sélective telle que 10 entre l'extérieur d'une part et entre les compartiments d'autre part, lorsque les passages avec I'extérieur sont fermés de manière à créer un volume intérieur fermé 11 dans lequel on établit, à l'aide de la turbine ,5, une circulation
interne d'air de l'échangeur-condenseur 9 vers l'échangeur- évaporateur 4.The aim of the invention is to provide, at each end of the recovery compartments 3 and for the recovery chamber 8, a selective communication such as between the outside on the one hand and between the compartments on the other hand, when the passages with I ' outside are closed so as to create a closed interior volume 11 in which is established, using the turbine, 5, a circulation
internal air of the exchanger-condenser 9 to the exchanger-evaporator 4.
L'air aspiré du compartiment de récupération traverse une ouverture de communication 12, se réchauffe au contact des ailettes de la htltt.erie de I 'éclanqeur- condenseur 9 et est véli i culé à travers une dcilxienle otiver'ttiie commun i cat i on 13 vers i'échdnseur-t;sapordteul 4. The air sucked from the recovery compartment passes through a communication aperture 12, heats up in contact with the fins of the equipment of the flasher-condenser 9, and is pushed through a common air inlet. 13 to the sorctor-t;
Le chauffage Je l'air de dégivrage s'effect-ue dans les meilleures conditions et avec un bon rendement puisqu'il traverse un échangeur t ai lettes alimenté en eau chaude pendant la phase de dégivrage. The heating I defrosting air is done under the best conditions and with a good efficiency since it passes through a heat exchanger supplied with hot water during the defrosting phase.
De même, l'air réchauffé traverse l'échangeur à ai lettes de l'évaporateur et fait fondre le givre avec ie maximum d'efficacité, diminuant ainsi la durée de la phase de dégivrage. Similarly, the heated air passes through the evaporator's air exchanger and melts the frost with maximum efficiency, thus reducing the duration of the defrosting phase.
Les moyens formant la communication sélective prévus à chaque extrémité des compartiments de récupération et de restitution seront réalisés, par exemple, sous la forme de volets simples tels que 14 (figure 1) ou doubles tels que 15 (figure 2), mobiles en pivotement prévus pour obturer les communications avec l'extérieur ou les communications internes 12 et 13 entre les compartiments 3 et 8. The means forming the selective communication provided at each end of the recovery and retrieval compartments will be made, for example, in the form of single flaps such as 14 (FIG. 1) or double flaps such as 15 (FIG. to close communications with the outside or internal communications 12 and 13 between compartments 3 and 8.
Ils seront montés, de préférence, en rappel élastique vers la position de fermeture dans laquelle ils obturent les communications internes. They will be mounted, preferably, in elastic return to the closed position in which they seal the internal communications.
Leur actionnement provient d'un détecteur de givrage qui commande par exemple des moteurs électriques. Their actuation comes from an icing detector which controls for example electric motors.
Bien entendu, une commande mécanique par tringlerie ou tout autre s'avère possible lorsque le besoin ou l'intérêt existera. Of course, a mechanical linkage control or any other proves possible when the need or interest will exist.
On expliquera ci-après, sommairement, le fonc t i onnement. The following is a brief description of the function.
La phase de givrage débute par l'arrêt du compresseur et la commande en fermeture des volets 14 ou 15 qui, de ce fait, dégagent les ouvertures 12 et 13. La circulation intérieure d'air s'établit entre l'échangeurcondenseur 9 chauffé par l'eau chaude du ou des circuits d'utilisation et l'évaporateur 4 pour la réalisation du dégivrage. En raison de l'efficacité du circuit selon l'invention, la durée de dégivrage est réduite de façon importante. The icing phase begins with the shutdown of the compressor and the closing control of flaps 14 or 15 which, as a result, clear the openings 12 and 13. The internal circulation of air is established between the heat exchanger 9 heated by the hot water of the use circuit (s) and the evaporator 4 for carrying out the defrosting. Due to the efficiency of the circuit according to the invention, the defrosting time is significantly reduced.
L'invention n'est pas limitée aux seuls moyens décrits. Il est bien entendu que diverses variantes directes, substitutions par des mat i ères ou moyens e < lu i val ents et autres mod i I i cat ions simples sans apport invention entrent pleinement dans son cadre. The invention is not limited to the only described means. It is understood that various direct variants, substitutions by materials or means e <lu i valts and other simple modi i cat ions ions without contribution invention fully within its scope.
Claims (9)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8112065A FR2508143A1 (en) | 1981-06-17 | 1981-06-17 | Deicing circuit for heat pump - has internal circulation loop heating all iced surfaces and in communication with condenser and evaporator of heat exchanger |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8112065A FR2508143A1 (en) | 1981-06-17 | 1981-06-17 | Deicing circuit for heat pump - has internal circulation loop heating all iced surfaces and in communication with condenser and evaporator of heat exchanger |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2508143A1 true FR2508143A1 (en) | 1982-12-24 |
Family
ID=9259677
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR8112065A Withdrawn FR2508143A1 (en) | 1981-06-17 | 1981-06-17 | Deicing circuit for heat pump - has internal circulation loop heating all iced surfaces and in communication with condenser and evaporator of heat exchanger |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2508143A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2000079193A1 (en) * | 1999-06-22 | 2000-12-28 | Multibrás S.A. Eletrodomésticos | An automatic defrost system for a refrigerating device |
EP2489964A1 (en) * | 2011-02-21 | 2012-08-22 | Digofin SRL | System and method for optimized defrosting |
Citations (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2432316A (en) * | 1946-05-29 | 1947-12-09 | Muncie Gear Works Inc | Heat pump |
US3151469A (en) * | 1961-10-02 | 1964-10-06 | Lester K Quick | Heat reclaiming system |
GB981004A (en) * | 1963-09-21 | 1965-01-20 | Vilter Manufacturing Corp | A refrigerating and defrosting system |
FR2238131A1 (en) * | 1973-07-20 | 1975-02-14 | Masse Daniel | Deicing system for cold room refrigeration unit - flap shuts off refrigerator from cold room during deicing |
FR2259321A1 (en) * | 1974-01-24 | 1975-08-22 | Stiebel Eltron Gmbh & Co Kg | Space-heating lay-out with heat pump - has additional heat supply to evaporator when environmental heat source temp falls |
DE2445312A1 (en) * | 1974-09-23 | 1976-04-01 | Erich Gross | Defrosting device for heat pump in form of cold compressor - has heating pipes with circulating liquid heated by energy abstracted from central heating circulation |
FR2284838A1 (en) * | 1974-09-13 | 1976-04-09 | Nieto Amour | Heat pump operating with the evaporator in air - and fitted with an additional defrosting evaporator |
DE2458981A1 (en) * | 1974-12-13 | 1976-06-16 | Bosch Siemens Hausgeraete | REFRIGERATED FURNITURE, IN PARTICULAR THROUGH FORCED COLD AIR-COOLED REFRIGERATOR |
DE2638408A1 (en) * | 1975-08-29 | 1977-03-03 | Nordkyl Fa | Air circulation unit for refrigerating systems - has cooling channel with air deflectors for cooling or heating |
DE2557314A1 (en) * | 1975-12-19 | 1977-06-30 | Licentia Gmbh | Deicing system for air conditioning heat pump - uses heated refrigerant and warm air for deicing at given intervals |
FR2347087A1 (en) * | 1976-04-06 | 1977-11-04 | Syrec Systemes Recuper Chaleur | Drying of gases, e.g. air from factory or process - using several heat pumps with heat recycle, saving energy |
FR2395474A1 (en) * | 1977-06-23 | 1979-01-19 | Volkswagenwerk Ag | MOTOR CONTROLLED HEAT PUMPING CIRCUIT |
DE2921257A1 (en) * | 1979-05-25 | 1980-12-04 | Sueddeutsche Kuehler Behr | Heat pump for central heating - combines heat exchanger and evaporator in common unit in refrigeration section of circuit |
-
1981
- 1981-06-17 FR FR8112065A patent/FR2508143A1/en not_active Withdrawn
Patent Citations (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2432316A (en) * | 1946-05-29 | 1947-12-09 | Muncie Gear Works Inc | Heat pump |
US3151469A (en) * | 1961-10-02 | 1964-10-06 | Lester K Quick | Heat reclaiming system |
GB981004A (en) * | 1963-09-21 | 1965-01-20 | Vilter Manufacturing Corp | A refrigerating and defrosting system |
FR2238131A1 (en) * | 1973-07-20 | 1975-02-14 | Masse Daniel | Deicing system for cold room refrigeration unit - flap shuts off refrigerator from cold room during deicing |
FR2259321A1 (en) * | 1974-01-24 | 1975-08-22 | Stiebel Eltron Gmbh & Co Kg | Space-heating lay-out with heat pump - has additional heat supply to evaporator when environmental heat source temp falls |
FR2284838A1 (en) * | 1974-09-13 | 1976-04-09 | Nieto Amour | Heat pump operating with the evaporator in air - and fitted with an additional defrosting evaporator |
DE2445312A1 (en) * | 1974-09-23 | 1976-04-01 | Erich Gross | Defrosting device for heat pump in form of cold compressor - has heating pipes with circulating liquid heated by energy abstracted from central heating circulation |
DE2458981A1 (en) * | 1974-12-13 | 1976-06-16 | Bosch Siemens Hausgeraete | REFRIGERATED FURNITURE, IN PARTICULAR THROUGH FORCED COLD AIR-COOLED REFRIGERATOR |
DE2638408A1 (en) * | 1975-08-29 | 1977-03-03 | Nordkyl Fa | Air circulation unit for refrigerating systems - has cooling channel with air deflectors for cooling or heating |
DE2557314A1 (en) * | 1975-12-19 | 1977-06-30 | Licentia Gmbh | Deicing system for air conditioning heat pump - uses heated refrigerant and warm air for deicing at given intervals |
FR2347087A1 (en) * | 1976-04-06 | 1977-11-04 | Syrec Systemes Recuper Chaleur | Drying of gases, e.g. air from factory or process - using several heat pumps with heat recycle, saving energy |
FR2395474A1 (en) * | 1977-06-23 | 1979-01-19 | Volkswagenwerk Ag | MOTOR CONTROLLED HEAT PUMPING CIRCUIT |
DE2921257A1 (en) * | 1979-05-25 | 1980-12-04 | Sueddeutsche Kuehler Behr | Heat pump for central heating - combines heat exchanger and evaporator in common unit in refrigeration section of circuit |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2000079193A1 (en) * | 1999-06-22 | 2000-12-28 | Multibrás S.A. Eletrodomésticos | An automatic defrost system for a refrigerating device |
US6526767B1 (en) | 1999-06-22 | 2003-03-04 | Mul'tibras S. A. Eletrodomesticos | Automatic defrost system for a refrigerating device |
EP2489964A1 (en) * | 2011-02-21 | 2012-08-22 | Digofin SRL | System and method for optimized defrosting |
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