EP0051893B1 - A device for extracting moisture from a space - Google Patents

A device for extracting moisture from a space Download PDF

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Publication number
EP0051893B1
EP0051893B1 EP19810201206 EP81201206A EP0051893B1 EP 0051893 B1 EP0051893 B1 EP 0051893B1 EP 19810201206 EP19810201206 EP 19810201206 EP 81201206 A EP81201206 A EP 81201206A EP 0051893 B1 EP0051893 B1 EP 0051893B1
Authority
EP
European Patent Office
Prior art keywords
moisture
liquid
space
tube
reservoir
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
EP19810201206
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0051893A1 (en
Inventor
Willem Ludovicus Nicolaas Van Der Sluijs
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.)
Whirlpool International BV
Original Assignee
Philips Gloeilampenfabrieken NV
Koninklijke Philips Electronics NV
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 Philips Gloeilampenfabrieken NV, Koninklijke Philips Electronics NV filed Critical Philips Gloeilampenfabrieken NV
Publication of EP0051893A1 publication Critical patent/EP0051893A1/en
Application granted granted Critical
Publication of EP0051893B1 publication Critical patent/EP0051893B1/en
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
    • F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
    • F24F3/1411—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification by absorbing or adsorbing water, e.g. using an hygroscopic desiccant
    • F24F3/1417—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification by absorbing or adsorbing water, e.g. using an hygroscopic desiccant with liquid hygroscopic desiccants
    • 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
    • F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
    • F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
    • F25D17/042—Air treating means within refrigerated spaces
    • 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
    • F25D21/14—Collecting or removing condensed and defrost water; Drip trays
    • 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
    • F25D2317/00—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass
    • F25D2317/04—Treating air flowing to refrigeration compartments
    • F25D2317/041—Treating air flowing to refrigeration compartments by purification
    • F25D2317/0411—Treating air flowing to refrigeration compartments by purification by dehumidification
    • 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
    • F25D2321/00—Details or arrangements for defrosting; Preventing frosting; Removing condensed or defrost water, not provided for in other groups of this subclass
    • F25D2321/14—Collecting condense or defrost water; Removing condense or defrost water
    • F25D2321/144—Collecting condense or defrost water; Removing condense or defrost water characterised by the construction of drip water collection pans
    • F25D2321/1441—Collecting condense or defrost water; Removing condense or defrost water characterised by the construction of drip water collection pans inside a refrigerator
    • 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
    • F25D2321/00—Details or arrangements for defrosting; Preventing frosting; Removing condensed or defrost water, not provided for in other groups of this subclass
    • F25D2321/14—Collecting condense or defrost water; Removing condense or defrost water
    • F25D2321/146—Collecting condense or defrost water; Removing condense or defrost water characterised by the pipes or pipe connections
    • 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
    • F25D2321/00—Details or arrangements for defrosting; Preventing frosting; Removing condensed or defrost water, not provided for in other groups of this subclass
    • F25D2321/14—Collecting condense or defrost water; Removing condense or defrost water
    • F25D2321/147—Collecting condense or defrost water; Removing condense or defrost water characterised by capillary, wick, adsorbent, or evaporation elements

Definitions

  • the invention relates to a device for extracting moisture from a space, which device comprises a loop circuit in which a hygroscopic liquid is circulated by means of a pump and in which circuit first means are included, arranged in said space for absorbing moisture by the hygroscopic liquid, which circuit includes a reservoir for the hygroscopic liquid, and in which circuit second means are included, arranged in a second space for evaporating the absorbed moisture from the hygroscopic liquid, said device including a concentration controller comprising an immersion body arranged to float in the liquid in the reservoir in the equilibrium state at a level which depends on the concentration of the hygroscopic liquid in the reservoir.
  • Such a device is known from U.S. Patent Specification No. 2 156 293.
  • the concentration controller operates an electrical switch so that the amount of heat for evaporating the moisture from the hygroscopic liquid is controlled. In this way the concentration of the hygroscopic liquid is indirectly controlled by the concentration controller.
  • a moisture extracting device in which the concentration of the hygroscopic solution is controlled by means of a temperature sensitive element which senses the boiling point of the diluted solution which is dependent upon the dilution of the hygroscopic solution.
  • the temperature sensitive element controls the amount of heat necessary for evaporation of the hygroscopic liquid.
  • the concentration controller controls the concentration of the hygroscopic liquid also in an indirect way.
  • the invention is characterized in that the immersion body controls a valve which in turn controls the rate of liquid flow to the second means which comprise a moisture-absorbing element.
  • the concentration of the hygroscopic liquid in the reservoir is controlled directly and can be maintained below a certain value.
  • the first means comprises a moisture-absorbing element made of cellulose as described in U.S. Patent No. 4 163 373, that crystallization of the dissolved liquid in the hygroscopic liquid at low temperature as a result of overconcentration of the hygroscopic liquid is avoided.
  • a preferred embodiment of the device in accordance with the invention is characterized in that a by-pass duct is arranged across the moisture-absorbing element, the liquid flow rate through which duct is controllable by the valve.
  • the by-pass duct is constituted by a tube which extends vertically from the reservoir, which tube has a chamber at the upper end, which chamber has one inlet opening and two outlet openings, of which a first outlet opening communicates with the moisture-absorbing element in the second space and of which a second outlet opening communicates with said tube, which first outlet opening is situated at a higher level than the second outlet opening, the valve being arranged in the second outlet opening and being connected to the body by means of a rod which extends through the tube.
  • the refrigerator has an insulated housing 3, which encloses a first space 1, the refrigerating space, from which moisture is to be extracted. Outside the housing is a second space 2 in which the moisture is evaporated and discharged.
  • the hygroscopic liquid for example a calcium bromide solution, is circulated in a loop circuit 5 by means of a pump 4.
  • the circuit includes first means which comprise a first moisture-absorbing element 6 arranged in the refrigerating space 1 of the refrigerator against evaporator tubes 7.
  • the first moisture-absorbing element in fact comprises three portions,, namely one portion 6a for the top and rear and two portions 6b and 6c for the two sides.
  • second means which comprise a second moisture-absorbing element 8 is included in the circuit, which element is arranged against condenser 9, forming part of the refrigeration circuit.
  • the moisture-absorbing element may for example be made of cellulose, such as blotting paper, or may be of nylon or glass-fibres.
  • the circuit includes a reservoir 10 for the hygroscopic liquid.
  • the hygroscopic liquid is pumped from the reservoir 10 to a distributor element 12 through a duct 11 and thence to three tubes 13, 14 and 15, of which the tube 15 is divided into two chambers. Under the influence of gravity the hygroscopic liquid flows from the tubes 13, 14 and 15 through the moisture-absorbing elements 6a, 6b and 6c. The ends of the moisture-absorbing elements each project through a slot (not shown) into the relevant tube. The moisture-absorbing elements are fitted closely against the evaporator tubes 7.
  • overflow ducts 19 and 20 are arranged between the tubes 13-16 and 14-17 respectively. Between the tubes 15-18 no overflow duct is necessary because the tube 15 communicates with the tubes 13 and 14.
  • the hygroscopic liquid in the tubes 16 and 17 flows to the tube 18 and thence through ducts 21 a and 21 b to the space 2 outside the housing, to the tube 22 and subsequently through the second moisture-absorbing element 8 to the tube 23.
  • the ends of said element each project from a slot of the relevant tube in the same way as the ends of the first elements.
  • the second moisture absorbing element 8 is fixed closely against the condenser 9.
  • Agan an overflow duct 24 is provided. From the tube 23 the liquid flows back to the reservoir 10.
  • the moisture is absorbed by the hygroscopic liquid at the location of the first moisture-absorbing elements 6a, 6b and 6c.
  • the absorbed moisture is evaporated from the hygroscopic liquid at the location of the second moisture-absorbing element 8.
  • this evaporation process is so intensive that the hygroscopic liquid becomes overconcentrated, which gives rise to the said problem of crystallization.
  • concentration controller 25 This concentration controller is constituted by an immersion body 26 arranged in the reservoir 10, to which a valve 27 is connected by means of a rod 28.
  • This rod extends through a tube 29, which extends vertically from the reservoir 10 and which has a chamber 30 at its upper end.
  • the chamber is located in the duct between the tubes 18 and 23 and for this purpose has an inlet opening 31 to which the duct 21 a is connected and a first outlet opening 32 to which the duct 21 b is connected.
  • a second outlet opening 33 Between the chamber 30 and the tube 29 there is provided a second outlet opening 33, whose passage can be controlled by the valve 27.
  • the hygroscopic liquid in the chamber 30 can either flow through the first outlet opening 32 to the second moisture-absorbing element 8 and thence back to the reservoir 10 or flow directly to the reservoir 10 through the second outlet opening 33 and the tube 29.
  • the valve 27 By means of the valve 27 the rate of flow of the liquid through the tube 29 can be controlled and thereby the rate of flow of the liquid through the second moisture-absorbing element.
  • the tube 29 thus functions as a kind of by-pass duct which bypasses the second moisture-absorbing element 8.
  • the weight of the immersion body 26 When the weight of the immersion body 26 is selected so that the immersion body floats in equilibrium in the second liquid when the liquid has the desired concentration, it is ensured that the concentration cannot become too high. If the concentration of the liquid in the reservoir exceeds the desired value because too much water has evaporated, the density of the liquid will increase. The immersion body 26 will then move upwards, so that the valve 27 opens and liquid of a lower concentration flows back directly to the reservoir 10 and is not further evaporated. If the concentration increases again, the valve will again close and all the liquid will flow to the evaporation section near the warm condenser.
  • the use of the invention is not limited to refrigerators.
  • the invention may equally be used in conjunction with air-conditioning equipment.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Drying Of Gases (AREA)
EP19810201206 1980-11-06 1981-10-29 A device for extracting moisture from a space Expired EP0051893B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL8006060A NL8006060A (nl) 1980-11-06 1980-11-06 Concentratieregelaar bestemd voor een inrichting voor het verwijderen van vocht uit een ruimte.
NL8006060 1980-11-06

Publications (2)

Publication Number Publication Date
EP0051893A1 EP0051893A1 (en) 1982-05-19
EP0051893B1 true EP0051893B1 (en) 1984-06-13

Family

ID=19836119

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19810201206 Expired EP0051893B1 (en) 1980-11-06 1981-10-29 A device for extracting moisture from a space

Country Status (5)

Country Link
EP (1) EP0051893B1 (nl)
JP (1) JPS57107228A (nl)
DE (1) DE3164219D1 (nl)
ES (1) ES8300194A1 (nl)
NL (1) NL8006060A (nl)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202004007069U1 (de) * 2004-05-04 2004-06-24 BSH Bosch und Siemens Hausgeräte GmbH Kältegerät mit einem Verdunstungskörper
US10845067B2 (en) 2010-05-18 2020-11-24 Energy & Enviornmental Research Center Hygroscopic cooling tower for waste water disposal
US10808948B2 (en) 2010-05-18 2020-10-20 Energy & Environmental Research Center Heat dissipation systems with hygroscopic working fluid
US10260761B2 (en) 2010-05-18 2019-04-16 Energy & Environmental Research Center Foundation Heat dissipation systems with hygroscopic working fluid
CN105579804A (zh) * 2013-07-29 2016-05-11 能源及环境研究中心基金会 具有吸湿性工作流体的散热系统

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2156293A (en) * 1935-11-09 1939-05-02 Kaufman Hiram Joseph Concentrator for hygroscopic solutions
US2498008A (en) * 1945-12-26 1950-02-21 Research Corp Concentration control
JPS50141150A (nl) * 1974-04-30 1975-11-13
JPS5323030A (en) * 1976-08-16 1978-03-03 Hitachi Ltd Three-phase transformer
NL7701242A (nl) * 1977-02-07 1978-08-09 Philips Nv Inrichting voor het verwijderen van vocht uit een ruimte.

Also Published As

Publication number Publication date
JPS57107228A (en) 1982-07-03
ES506830A0 (es) 1982-10-01
DE3164219D1 (en) 1984-07-19
EP0051893A1 (en) 1982-05-19
ES8300194A1 (es) 1982-10-01
NL8006060A (nl) 1982-06-01

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