EP0699886A1 - Dispositif d'arrosage pour éléments d'évaporation - Google Patents

Dispositif d'arrosage pour éléments d'évaporation Download PDF

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Publication number
EP0699886A1
EP0699886A1 EP95110395A EP95110395A EP0699886A1 EP 0699886 A1 EP0699886 A1 EP 0699886A1 EP 95110395 A EP95110395 A EP 95110395A EP 95110395 A EP95110395 A EP 95110395A EP 0699886 A1 EP0699886 A1 EP 0699886A1
Authority
EP
European Patent Office
Prior art keywords
liquid
evaporator
sprinkler device
elements
evaporator elements
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Withdrawn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
EP95110395A
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German (de)
English (en)
Inventor
Hubert De Vries
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
Publication of EP0699886A1 publication Critical patent/EP0699886A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D3/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium flows in a continuous film, or trickles freely, over the conduits
    • F28D3/04—Distributing arrangements

Definitions

  • the invention relates to a sprinkler device for evaporator elements, in particular for plate-shaped evaporator elements of a cooling device, with a trough-like liquid container which is arranged above the essentially vertically oriented evaporator elements and which is provided with a parallel opening arrangement that supplies liquid to the evaporator elements and runs in the longitudinal direction of the evaporator elements.
  • Such a sprinkler device is known for example from GB 11 26 738 and from the magazine “Gemüse 10/1986", p. 392 ff, for cooling and humidifying devices. It is essential here that the vertical evaporator elements or evaporator plates are covered as completely and uniformly as possible with a film of water. This water is then collected again below the evaporator plates and pumped back to the liquid container arranged above the evaporator plates.
  • the liquid in the liquid container passes through rows of holes to the evaporator plates arranged below and then trickles downwards along the same.
  • These rows of holes have the disadvantage that, on the one hand, the holes can be easily blocked by impurities, and on the other hand, with such holes, it is very difficult to achieve uniform moistening of the evaporator plates, especially in the upper region. If, on the other hand, longitudinal slots or slot openings were provided instead of the holes, it would be relatively difficult to supply defined and limited amounts of water to the evaporator plates.
  • strip-shaped liquid distributors are provided in the region of the two long sides of the opening arrangements and resiliently bear on opposite sides of the respective evaporator element.
  • the arrangement according to the invention achieves a completely uniform distribution of liquid over the length of the respective evaporator elements, since the strip-shaped liquid distributors lie evenly over the entire length. Since these strip-shaped liquid distributors rest elastically on the evaporator elements, the amount of liquid distributed can be adjusted in a simple manner by the height of the liquid level in the liquid container. Because of the water pressure, the strip-shaped liquid distributors are lifted more or less elastically from the evaporator elements. This elastic system also enables self-cleaning because of possible dirt particles can get through by elastic lifting of the liquid distributor without the liquid distributor could be blocked. A special cleaning device is therefore not necessary. If necessary, the strip-shaped liquid distributors can be replaced, for example by those that allow a larger or smaller water throughput.
  • the upper end edges of the plate-like evaporator elements are positioned substantially centrally below or in the opening arrangements, so that both sides of the evaporator elements are sprinkled with liquid in the same way.
  • the two strip-shaped liquid distributors of an evaporator element are each designed to converge obliquely downwards towards this evaporator element.
  • the contact surfaces between the liquid distributor and the evaporator element form a lowest point of the liquid level in the liquid container, so that the strip-shaped Liquid distributors are constantly supplied or supplied with liquid. This also promotes the uniform formation of a water film along the evaporator elements.
  • the opening arrangements can be designed as slot openings, since the metering of liquid is now carried out by the strip-shaped liquid distributors.
  • a particularly good supply of water to the liquid distributors or evaporator elements is achieved in that the bottom of the liquid container, at least in the region of the evaporator elements, has parallel channels which taper in cross-section and that the opening arrangements are each arranged in the lowest region of the channels .
  • the channels are formed in a constructively advantageous embodiment by zigzag lined up or bent sheet metal strips.
  • Holding strips of liquid distributors can be special can be easily and securely attached to the metal strip.
  • Strip brushes which achieve the distribution and metering of the liquid supplied to the evaporator elements particularly well, have proven to be the most favorable design of the strip-shaped liquid distributors. Due to the water permeability of the strip brushes, the risk of a complete seal is low and the cleaning effect and insensitivity to dirt are particularly good.
  • this liquid container has at least one filling space for the liquid, which is separated from the rest of the liquid container by an overflow wall and / or a wall provided with through openings is separated.
  • This filling space is expediently arranged outside the area of the evaporator elements.
  • the liquid from a collection container below the evaporator elements to the liquid container above the pump device returning the evaporator elements ensures that the liquid level in the liquid container required for a certain sprinkling quantity can be set.
  • a multiplicity of evaporator plates 10 arranged vertically and parallel to one another form a cooler which is, for example, part of a cooling device, not shown in any more detail.
  • Fig. 1 only the upper end regions of 17 evaporator plates are for simplification 2 and only an enlarged representation of three of these upper end regions of evaporator plates 10 in FIG. 2.
  • a coolant such as ammonia, frigen or the like, flows through these evaporator plates of the cooler, a cooling circuit being shown in a manner not known and known per se the coolant between the cooler and a heat exchanger connected to a compressor refrigerator.
  • the evaporator plates 10 are sprinkled with a liquid for cooling from the outside, as will be explained in more detail later.
  • Such a cooler consisting of evaporator plates 10 can of course also be used for other applications.
  • a liquid trough 11 for receiving the liquid, which is supplied from there to the evaporator plates 10, flows down or trickles along them and is collected there in a collecting trough, not shown.
  • the liquid is then pumped up again into the liquid trough 11 by means of a pump (not shown in any more detail), only the end region 12 opening into the liquid trough 11 being shown for simplification.
  • the liquid trough 11 Two areas can be distinguished in the liquid trough 11.
  • the liquid first flows from the end region 12 of the line into an outer filling region 13, which is separated from an inner feed region 14 for the evaporator plates 10 by a calming wall 15. Only when the liquid level in the feed area 14 has reached a certain height can the liquid reach the feed area 14 via the calming wall 15. Currents, waves or the like, which are caused by the filling process, are largely eliminated.
  • the calming wall 15 can additionally have openings through which the liquid can pass through this calming wall 15 into the feed area 14. These openings can also be dimensioned such that an overflow of the calming walls 15 no longer occurs.
  • the feed area 14 essentially comprises the area under which the evaporator plates 10 are arranged.
  • the bottom wall 16 of the liquid trough 11 in the feed area 14 has a zigzag-like cross section and is formed by angled sheet metal strips or by a correspondingly bent sheet metal plate.
  • parallel channels 17 running in the longitudinal direction of the evaporator plates 10 are formed, which each have slot openings 18 in their lowermost area. Since the length of the troughs often extends over 2 to 3 m, instead of a continuous slot opening 18 to increase the mechanical stability, an opening arrangement of slots arranged in the longitudinal direction can occur, which are each separated from one another by webs.
  • the upper end regions of the evaporator plates 10 are located below these slot openings 18.
  • strip brushes 19 are each fixed to the flat walls of the channels 17 so that their bristles 20 converge obliquely downwards below the slot openings 18 and each rests elastically on opposite sides of an evaporator plate 10.
  • the strip brushes 19 have a length corresponding to the length of the channels 17 or the evaporator plates 10, but can of course also be composed of a plurality of strip brushes 19 lined up. It is essential that the bristles 20 form continuous rows of bristles abutting the evaporator plates 10.
  • the strip brushes 19 consist of a bristle holder 21 holding the bristles 20 and a holding strip 22 fixed thereon, with the aid of which the respective strip brush 19 on the bottom wall 16 or the wall of one Channel 17 is fixed.
  • the upper end edges of the evaporator plates 10 extend slightly through the slot openings 18. These upper end edges can also end below the slot openings 18, but should be arranged substantially centrally to the slot openings 18 in order to achieve an even distribution of the water running down on both sides of the evaporator plates 10.
  • the liquid filled into the liquid wall 11 passes through or through the calming wall 15 into the feed area 14 and fills the channels 17 there.
  • the bristles 20 of the strip brushes 19 are lifted elastically from the evaporator plates 10, so that water follows along these evaporator plates 10 can trickle down.
  • the evenly fitting bristles 20 result in a uniform sprinkling of the evaporator plates 10. If dirt particles get into the bristles 20 which hinder the passage of the liquid, the water level is automatically increased by this "blockage", and the brushes then become due to the geodetic excess pressure give way to the water pressure, whereby the dirt particles are automatically flushed out, so that an automatic Cleaning is guaranteed.
  • a flat bottom wall 23 of the liquid trough 11 is provided.
  • Corresponding slot openings 24 running in the longitudinal direction of the evaporator plates 10 are provided in this bottom wall 23.
  • the strip brushes 19 are fixed below the edge regions of the slot openings 24, and the bristles 20 in turn run obliquely downwards towards the evaporator plates 10.
  • the schematically represented liquid 25 flows into the channels now formed by the bristles 20 and through the bristles resiliently abutting the evaporator plates 10, as a result of which a liquid film 26 flows downwards along the evaporator plates 10.
  • strip brushes are each arranged in the region of the two long sides of these opening arrangements, so that liquid can get through the opening arrangements into the channels formed by the brushes abutting the evaporator plates 10.
  • strip brushes have proven to be very good liquid distributors
  • other strip-shaped liquid distributors which resiliently rest against the evaporator plates 10 can also be used.
  • liquid distributors could consist of a variety of elastically fitting strips, tapes, rags or the like. consist.
  • sponge-like ledge elements could be used as a liquid distributor.
  • An arrangement of a plurality of evaporator plates provided with strip brushes can be used in particular as a cooling tower of a water-cooled refrigeration system and / or an indirectly working cooling circuit.
  • a cooling tower is generally arranged on a building roof, but other arrangements are also possible.
  • a blower can also be arranged, for example, to the side of the evaporator plates 10 on their end faces, which generates a horizontal air flow flowing past the evaporator elements.
  • Such a blower which can of course also be composed of several individual blowers, is suitable for such cooling towers, but can also be used in other applications.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
EP95110395A 1994-09-03 1995-07-04 Dispositif d'arrosage pour éléments d'évaporation Withdrawn EP0699886A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4431536 1994-09-03
DE19944431536 DE4431536A1 (de) 1994-09-03 1994-09-03 Berieselungsvorrichtung für Verdampferelemente

Publications (1)

Publication Number Publication Date
EP0699886A1 true EP0699886A1 (fr) 1996-03-06

Family

ID=6527424

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95110395A Withdrawn EP0699886A1 (fr) 1994-09-03 1995-07-04 Dispositif d'arrosage pour éléments d'évaporation

Country Status (2)

Country Link
EP (1) EP0699886A1 (fr)
DE (1) DE4431536A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1030154A3 (fr) * 1999-02-16 2001-01-03 Carrier Corporation Echangeur de chaleur avec évaporateur à film tombant et système de distribution de réfrigérant

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202009011311U1 (de) 2009-08-12 2009-10-22 Systemtechnik Vritherm Gmbh Eisspeicher

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3332469A (en) * 1966-09-13 1967-07-25 Rosenblad Corp Falling film type heat exchanger
GB1126738A (en) 1965-01-15 1968-09-11 Baltimore Aircoil Co Inc Heat exchangers and troughs therefor
DE3317951A1 (de) * 1982-05-26 1983-12-01 Hitachi, Ltd., Tokyo Waermetauscher mit rieselfilmverdampfung
US4564064A (en) * 1983-05-16 1986-01-14 Chicago Bridge & Iron Company Falling film heat exchanger with member to distribute liquid on external surfaces of tubes
DE4024276A1 (de) 1990-07-31 1992-02-06 Vries Hubert De Kuehl- und befeuchtungsvorrichtung fuer waren, wie blumen, gemuese, obst, kaese o. dgl.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1126738A (en) 1965-01-15 1968-09-11 Baltimore Aircoil Co Inc Heat exchangers and troughs therefor
US3332469A (en) * 1966-09-13 1967-07-25 Rosenblad Corp Falling film type heat exchanger
DE3317951A1 (de) * 1982-05-26 1983-12-01 Hitachi, Ltd., Tokyo Waermetauscher mit rieselfilmverdampfung
US4564064A (en) * 1983-05-16 1986-01-14 Chicago Bridge & Iron Company Falling film heat exchanger with member to distribute liquid on external surfaces of tubes
DE4024276A1 (de) 1990-07-31 1992-02-06 Vries Hubert De Kuehl- und befeuchtungsvorrichtung fuer waren, wie blumen, gemuese, obst, kaese o. dgl.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
GEMUESE, vol. 10, 1986, pages 392

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1030154A3 (fr) * 1999-02-16 2001-01-03 Carrier Corporation Echangeur de chaleur avec évaporateur à film tombant et système de distribution de réfrigérant

Also Published As

Publication number Publication date
DE4431536A1 (de) 1996-03-07

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