EP0073363B1 - Evaporateur pour un appareil de refroidissement à plusieurs témperatures - Google Patents

Evaporateur pour un appareil de refroidissement à plusieurs témperatures Download PDF

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Publication number
EP0073363B1
EP0073363B1 EP19820107148 EP82107148A EP0073363B1 EP 0073363 B1 EP0073363 B1 EP 0073363B1 EP 19820107148 EP19820107148 EP 19820107148 EP 82107148 A EP82107148 A EP 82107148A EP 0073363 B1 EP0073363 B1 EP 0073363B1
Authority
EP
European Patent Office
Prior art keywords
evaporator
side wall
passage
piping
cover plate
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.)
Expired
Application number
EP19820107148
Other languages
German (de)
English (en)
Other versions
EP0073363A2 (fr
EP0073363A3 (en
Inventor
Georg Ing. Grad. Rannenberg
Gerd Dipl.-Ing. Vollhardt
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.)
Licentia Patent Verwaltungs GmbH
Original Assignee
Licentia Patent Verwaltungs GmbH
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 Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Publication of EP0073363A2 publication Critical patent/EP0073363A2/fr
Publication of EP0073363A3 publication Critical patent/EP0073363A3/de
Application granted granted Critical
Publication of EP0073363B1 publication Critical patent/EP0073363B1/fr
Expired legal-status Critical Current

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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
    • F25B39/00—Evaporators; Condensers
    • F25B39/02—Evaporators
    • F25B39/022—Evaporators with plate-like or laminated elements

Definitions

  • the invention relates to an evaporator according to the preamble of the claim.
  • the refrigerant channel in the base plate is formed by two tubes which run parallel to one another and to the outer edges and which open at their respective flow output end into a separate chamber which is arranged in the side wall are.
  • Parallel channels lead from these evaporator chambers into further evaporator chambers arranged in the ceiling board, the ceiling board rising from the connecting edge with the side wall to the free end relative to a horizontal plane.
  • Separate pipes lead from the refrigerant chambers to another common evaporator chamber in the ceiling board. From there, a line leads directly to another evaporator chamber in the side wall and a separate channel through the side wall to a normal cooling compartment evaporator.
  • the refrigerant channel leads from the normal refrigeration compartment evaporator back into the side wall and then also into the further evaporator chamber of the side wall.
  • the operation of this evaporator is such that, for. B. after four minutes of operation, a last chamber in the ceiling board is filled with liquid refrigerant, which then flows through a refrigerant channel led over the side wall into a refrigerant channel of the normal cooling compartment evaporator. From there, the still largely liquid refrigerant flows through a refrigerant channel, which is also led back into the side wall, into a refrigerant chamber of the side wall.
  • This refrigerant chamber serves as a refrigerant accumulator, in which the liquid refrigerant is only separated from the gaseous refrigerant.
  • the refrigerant flowing in from the freezer compartment evaporator can therefore also be predominantly liquid only during the downtime of the compression refrigerator.
  • the refrigerant channel continues to be supplied with predominantly liquid refrigerant, especially in the area of the connection point between the freezer compartment evaporator and the main refrigerator compartment evaporator, so that the connection point continues to be strongly cooled.
  • a relatively high heating output must be provided in this area. Therefore, a heating conductor is led twice through the connection point and thus a high specific surface heating power is provided in comparison to the remaining surface to be heated.
  • An evaporator is also known (GB-A-1 213 644), which is designed as a flat plate with refrigerant channels formed therein.
  • a channel section is designed in the plane of the other channel sections as a parallel channel with two transverse channels.
  • Pipes for the insertion of electrical heating elements, which are used for defrosting ice or frost layers, run parallel to the individual channel sections in the circuit board of the evaporator.
  • an evaporator for a multi-temperature refrigerator in which a box-shaped curved evaporator section is provided for a freezer compartment, to which a plate-shaped normal refrigerator compartment evaporator is connected.
  • the box-shaped curved evaporator section is provided with tabs on its rear, free edge, which Have refrigerant channels extending on the inside and are connected to connections of the other refrigeration system.
  • an evaporator for a multi-temperature refrigerator which has a freezer compartment evaporator and a downstream main refrigerator compartment evaporator.
  • the freezer compartment evaporator is also box-shaped and partially provided with parallel channels which are connected to one another by transverse channels.
  • the structure is such that the main cooler evaporator is filled with liquid refrigerant during the operating time, which is sucked back in the downtime of the compressor by generating a vacuum in the freezer evaporator.
  • the resulting evaporation cold causes strong icing of the connecting line.
  • an evaporator for a multi-temperature refrigerator is known (FR-A-1 434 700), which is designed as a box and is assigned only to the freezer compartment.
  • the underlying normal cooling compartment of the corresponding cooling device is cooled via the common partition wall adjacent to the freezer compartment.
  • the invention has for its object to take measures in an evaporator according to the preamble of the claim, by which icing on the main refrigeration evaporator in the area of the connection point between the freezer evaporator and the main refrigeration evaporator can be avoided with a simple structure by the afterflow of liquid refrigerant during the downtime of the compression refrigerator the main refrigerator compartment evaporator is avoided and thus the additional energy required for defrosting can be significantly reduced or eliminated.
  • a type of refrigerant accumulator is created in the base plate by the relatively large volume of the piping provided there, which causes a uniform distribution of the refrigerant over the surface of the base plate and nevertheless already has a section-wise parallel guidance of pipes with crosspieces largely separates liquid and gaseous refrigerant.
  • the transverse channel or channels effect a further separation in the subsequent parallel channel led through the side wall, the separated liquid refrigerant flowing back into the base plate.
  • the refrigerant channel in the ceiling board is additionally distributed in meandering turns over the surface and the ceiling board rises, liquid refrigerant still contained is evaporated or flows through the turns back down to the parallel channel and into the floor board.
  • This mode of operation is particularly effective during the downtimes of the compressor, after which the refrigerant is then driven only by the evaporation.
  • An influx of liquid refrigerant into the refrigerant channel led through the side wall to the normal cooling compartment evaporator does not occur because the tubing of the ceiling board at the flow outlet end passes through a point that is higher than the other turns.
  • a bottom plate 1 and a slightly inclined ceiling plate 2 together with a vertical side wall 3 form a one-piece freezer evaporator, to which a plate-shaped main refrigerator compartment evaporator 5 connects, which is approximately in the plane of the side wall 3.
  • the ceiling board 2 is inclined from its connecting edge 6 to the side wall 3 ascending relative to a horizontal plane.
  • a throttle tube 14 is inserted in the ceiling plate 2, through which the refrigerant is introduced into the refrigerant channel 7.
  • the refrigerant channel 7 is guided through the ceiling board 2 and the side wall 3 directly and without any turns into the floor board 1.
  • the refrigerant channel 7 branches into three sections connected in series with parallel pipes 8 which communicate in groups through a plurality of cross lines 9.
  • the parallel winding branches of the tubing in the base plate 1 enable, in particular, the gaseous components to have a separate flow path from the highly fluid-laden channel sections, so that the majority of the liquid components remain in the base plate 1.
  • the gaseous fractions flow through a parallel duct 10 leading away from the last branch of the winding, vertically upward through the side wall 3 into the ceiling board 2.
  • At least one transverse duct 11 is provided in the parallel duct 10 for further separation of liquid and gaseous refrigerants according to static laws.
  • the tubing is uniformly distributed in turns over the surface, the outflow pipe 12 running through the side wall 3 continuously falling down to the connecting neck 4 and further to the turns of the main cooling compartment evaporator 5.
  • the ceiling board 2 which is inclined slightly upwards from the connecting edge 6, a further separation between gaseous and liquid refrigerant is achieved by the slope, the liquid refrigerant being returned to the bottom board 1 of the freezer compartment evaporator.
  • the connecting neck 4 is therefore no longer acted upon by evaporable refrigerant, so that no significant cooling capacity reaches the main cooling compartment evaporator 5.
  • the connecting neck 4 which tends to freeze during operation, is exposed to a significantly lower cold load during the defrosting phase, so that no more ripening or use is possible on it than on the main cooling compartment evaporator 5. There is therefore little or no heating of this connection neck 4, which enables considerable energy savings.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)

Claims (1)

  1. Evaporateur pour un appareil de refroidissement à plusieurs températures, qui comprend un compartiment de réfrigération principal placé au-dessous d'un compartiment de congélation pour produits surgelés et un évaporateur, associé au compartiment de congélation pour produits surgelés, qui comporte, au moins dans une plaque de couverture (2), dans une paroi latérale (3) et dans une plaque de fond (1) un conduit (7) d'agent réfrigérant constitué par une tubulure assurant la circulation de l'agent réfrigérant, l'introduction de l'agent réfrigérant détendu dans le conduit (7) de l'agent réfrigérant s'effectuant dans la plaque de couverture (2) qui est en pente ascendante à partir de son bord de liaison (6) avec la paroi latérale (3), le conduit (7) de l'agent réfrigérant étant orienté de manière à tomber d'une manière abrupte de la plaque de couverture (2) dans la paroi latérale (3) pour aboutir directement à la tubulure (8, 9) de la plaque de fond (1) dont la tubulure se raccorde, à son extrémité située du côté de la sortie du fluide, à un conduit (10) parallèle qui s'élève d'une manière constamment abrupte dans la paroi latérale (3) et se raccorde directement à la tubulure de la plaque de couverture (2), l'extrémité (12) de cette tubulure, du côté de la sortie du fluide, s'incurvant pour descendre d'une manière abrupte dans la paroi latérale (3) jusqu'à l'évaporateur (5) du compartiment de réfrigération normale auquel elle est reliée et qui, dans le circuit de circulation de l'agent réfrigérant, est monté en série en aval de l'évaporateur du compartiment de congélation pour produits surgelés, caractérisé en ce que le conduit (7) de l'agent réfrigérant comporte, dans la plaque de fond (1), des sections reliées de manière à se suivre et comportant des conduites tubulaires (8) parallèles reliées par des conduites transversales (9) groupées, en ce que la dernière section constitue le point de départ des branches du conduit parallèle (10) qui, à l'intérieur de la paroi latérale (3), sont reliées entre elles par au moins un conduit transversal (11), en ce qu'ensuite le conduit (7) de milieu réfrigérant, en arrivant dans la plaque de couverture (2), forme sans se subdiviser des sinuosités en forme de méandres sur toute la surface, en ce que les branches de ces sinuosités sont parallèles au bord de liaison (6), en ce que le conduit parallèle (10) est relié à la tubulure de la plaque de couverture (2) à proximité du bord de liaison (6) et en ce que l'extrémité de la tubulure de la plaque de couveture (2) qui est située du côté de la sortie du fluide passe par un point (13) qui est situé plus haut que le reste des sinuosités.
EP19820107148 1981-08-29 1982-08-07 Evaporateur pour un appareil de refroidissement à plusieurs témperatures Expired EP0073363B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813134300 DE3134300A1 (de) 1981-08-29 1981-08-29 Verdampfer fuer ein kuehlgeraet
DE3134300 1981-08-29

Publications (3)

Publication Number Publication Date
EP0073363A2 EP0073363A2 (fr) 1983-03-09
EP0073363A3 EP0073363A3 (en) 1983-07-06
EP0073363B1 true EP0073363B1 (fr) 1985-06-26

Family

ID=6140473

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19820107148 Expired EP0073363B1 (fr) 1981-08-29 1982-08-07 Evaporateur pour un appareil de refroidissement à plusieurs témperatures

Country Status (2)

Country Link
EP (1) EP0073363B1 (fr)
DE (1) DE3134300A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3224452A1 (de) * 1982-06-30 1984-01-05 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Kuehlmoebel, insbesondere zweitemperaturen-einkreis-kuehlschrank
DE4141641A1 (de) * 1991-12-17 1993-06-24 Bosch Siemens Hausgeraete Zweitemperaturen-einkreiskuehlgeraet
DE19840427A1 (de) * 1998-09-04 2000-03-09 Bsh Bosch Siemens Hausgeraete Verdampferanordnung

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7431690U (de) * 1975-07-03 Bosch Siemens Hausgeraete Gmbh Verdampfer für Kühlgeräte, Insbesondere Zweitemperaturen-Kühlschränke
DE1092939B (de) * 1957-07-09 1960-11-17 Gen Motors Corp Anordnung von Kaeltemittelleitungen in Kaeltemaschinen
US2986901A (en) * 1959-03-13 1961-06-06 Whirlpool Co Refrigerant evaporator
DE1232598B (de) * 1964-07-10 1967-01-19 Danfoss As Kaelteanlage mit Verdampfer
FR1434700A (fr) * 1964-09-15 1966-04-08 Bosch Gmbh Robert évaporateur pour machines frigorifiques, notamment pour réfrigérateurs ménagers et machine équipée du dit évaporateur
DE1254650B (de) * 1964-12-01 1967-11-23 Danfoss As Kaelteanlage mit Verdampfer
US3263440A (en) * 1964-12-14 1966-08-02 Electrolux Ab Refrigeration
DE1476988A1 (de) * 1966-06-18 1970-03-19 Bosch Hausgeraete Gmbh Verdampfer fuer Kuehlgeraete,insbesondere fuer Haushalts-Kuehlschraenke
GB1213644A (en) * 1967-03-03 1970-11-25 Alcoa Of Great Britain Ltd Improvements in or relating to heat exchangers
DE6903900U (de) * 1969-01-31 1969-07-10 Bauknecht Gmbh G Kuehlmoebel
US3717009A (en) * 1971-04-26 1973-02-20 Gen Motors Corp Refrigeration evaporator assembly
DE2231538A1 (de) * 1971-07-03 1973-01-11 Zanussi A Spa Industrie Verbesserung an kuehlmoebelverdampfern und herstellungsverfahren dazu
IT1126976B (it) * 1979-03-12 1986-05-21 Schmoele Metall R & G Perfezionamento negli evaporatori per impianti frigoriferi

Also Published As

Publication number Publication date
EP0073363A2 (fr) 1983-03-09
DE3134300C2 (fr) 1988-06-01
EP0073363A3 (en) 1983-07-06
DE3134300A1 (de) 1983-03-10

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