EP3674616B1 - Air dehumidifier, especially for air cooling or air conditioning machines - Google Patents

Air dehumidifier, especially for air cooling or air conditioning machines Download PDF

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Publication number
EP3674616B1
EP3674616B1 EP19215543.0A EP19215543A EP3674616B1 EP 3674616 B1 EP3674616 B1 EP 3674616B1 EP 19215543 A EP19215543 A EP 19215543A EP 3674616 B1 EP3674616 B1 EP 3674616B1
Authority
EP
European Patent Office
Prior art keywords
air
snow
ice
cooling chamber
cooling
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.)
Active
Application number
EP19215543.0A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3674616A1 (en
Inventor
Vladyslav Tsyplakov
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.)
Mirai Intex SAGL
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Mirai Intex SAGL
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Publication of EP3674616A1 publication Critical patent/EP3674616A1/en
Application granted granted Critical
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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
    • 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
    • F25D17/045—Air flow control arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/41—Defrosting; Preventing freezing
    • 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
    • F25B37/00—Absorbers; Adsorbers
    • 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
    • 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
    • F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
    • 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
    • F25D17/047—Pressure equalising devices
    • 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
    • F25D21/065—Removing frost by mechanical means
    • 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
    • F25B2700/02—Humidity
    • 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

Definitions

  • the invention relates to an air dehumidifier, especially for air cooling or air conditioning machines, arranged inside a cooling chamber upstream of an air outlet from the cooling chamber, which comprises a body in which a purifying cassette is mounted.
  • RU 2200283 C1 discloses an adsorber in which a special sorption material is used. At low temperatures, the sorption material has low absorbing power, which leads to frequent exchanges of columns/adsorbers for regeneration thereof, until the sorption material is no longer capable of operating. In addition, the presence of water in the air flow leads to the formation of snow/ice at the inlet of the adsorber working volume filled with the sorption material. The amount of snow/ice increases rapidly and reduces the cross-section of the device until it is entirely filled, thus disabling its function. Moreover, at atmospheric pressure the absorbing power of the adsorbers is considerably lower than when working with compressed air. Snow and/or ice is removed from the adsorber after interruption of cooling by heating it.
  • RU 2360186 C1 describes a dryer in which drying is performed by cooling. To design this type of dryer for temperatures below -60 °C is very difficult, since cascade refrigeration systems using different cooling media need to be employed. In addition, the air flow cooling dryer requires increased heat transfer surfaces at atmospheric pressure.
  • Continuous regeneration disk adsorbers are known, but their use is associated with a significant increase in temperature in the operating mode and with increased energy consumption for the regeneration system.
  • Patent application JP 2004066162 describes a device for the removal of oil mist, which is formed by a labyrinth air dehumidifier, in which separation occurs as a result of multiple enlargement and reduction in the passage cross-section. Water or oil is collected on plates which form a labyrinth and flows downwards. Such a device cannot operate in cases of phase transition, i.e. freezing of water or another substance, because in these cases the passage cross-section is completely blocked.
  • patent application GB 2380246 discloses a method of removing moisture from a cooling unit.
  • This solution is based on air passing through a body which is filled with a metal mesh. In this case, the moisture is deposited on the mesh and flows down into the body. Reducing the temperature below 0 °C creates the same problem as in adsorption dryers, i.e., ice freezing on the inlet surface of the mesh block until the passage cross section is completely covered. In this solution, too, snow and/or ice is removed from the metal mesh by heating, which means that the cooling process must be interrupted.
  • WO 2005/119139 A2 discloses a known dehumidification device for removing condensed moisture from a freon-cooled surface by means of air condensation.
  • the freezing temperature of this solution is 0 °C, which means that condensation will not take place at lower temperatures.
  • the ice is heated to melt into water by an ultrasonic evaporator, the water flows into a pump and is drained out of the system.
  • a fan is used to move the air.
  • the device cannot be used for ultra-low temperatures
  • Z Document RU2141607C1 describes a thermoelectric cooling machine in which compressed air passes through a hydrophobic coolant in which moisture is frozen from the air, which collects in the form of snow or ice on the surface of the coolant. If it is necessary to remove snow and ice from the coolant level, a sieve is inserted into it, on which the snow and ice are caught, and after lifting the sieve, the snow and ice are scraped off mechanically. Mechanical intervention in the sieve causes its wear and reduces its service life.
  • the goal of the invention is to extend the operating time of an air cooling machine without interruption caused by removal of snow and/or ice from an air dehumidifier and to ensure moisture removal during the operation of the machine.
  • an air dehumidifier whose principle consists in that a purifying cassette comprises an outer frame in which an inner frame is accommodated by means of flexible connectors, the space inside both frames being filled with a metal sieve and the inner frame being connected to an ultrasonic radiator (generator) from which vibrations are transmitted to the sieves from which solid particles of snow and/or ice fall off due to the vibrations and by gravity are transported to an ice collector which is associated with a snow and/or ice conveyor which opens into a snow and/or ice collection container.
  • the collection container is disposed outside the cooling chamber.
  • the air dehumidifier enables to remove snow and/or ice from the cooling chamber without interrupting the operation of the air cooling or air conditioning machine. Continuity of operation reduces the cost of defrosting the system and, as a result, increases the energy efficiency of the entire system.
  • At least the outer part of the snow and/or ice conveyor between the cooling chamber and the snow and/or ice collection container is mounted in a housing, whereby the housing may be provided also in the inner space of the cooling chamber.
  • a balancing valve is mounted on the housing.
  • FIG. 1 shows an arrangement of an air dehumidifier and a block valve in a cooling chamber
  • Fig. 2 is a partial crosssectional front view of the air dehumidifier in the cooling chamber
  • Fig. 2b is a side view of the air dehumidifier
  • Fig. 3a is a front view of a purifying cassette
  • Fig. 3b is an axonometric view of the purifying cassette.
  • air containing water in the form of water vapor is used as a refrigerant.
  • the water vapor solidifies at temperatures below 0 ° C.
  • dehumidifiers are used, the dehumidifiers being usually located directly in a cooling chamber 1 .
  • Low temperature cooling air is supplied to the cooling chamber 1 through an inlet air conduit 21 and from the cooling chamber 1 air is discharged through an outlet air conduit 22 .
  • the inlet air conduit 21 is connected to an inlet 31 of a two-way or block valve 3 , to the outlet 32 of which is connected the outlet air conduit 22 and which is arranged in the inner space of the cooling chamber 1 .
  • the cooling air from the inlet air conduit 21 passes through the inlet 31 of the double three-way or block valve 3 and from there it is supplied to the air inlet 11 of the cooling chamber 1 .
  • an air dehumidifier 4 is arranged inside the cooling chamber 1 through which air passes before leaving the cooling chamber 1 and in which solid particles of water are collected.
  • the double three-way or block valve 3 is coupled to a machine control system.
  • the dehumidifier 4 comprises a body 41 in which a purifying cassette 42 is mounted. Beneath the purifying cassette 42, in the body 41 of the dehumidifier 4 is arranged a snow and/or ice collector 43 into whose inner space 431 extends a snow and/or ice conveyor 44 which passes through the wall of the cooling chamber 1 to the outer space, where it opens into a snow and/or ice collection container 45.
  • the snow and/or ice collection container 45 may be mounted on the outer jacket of the cooling chamber 1 or at a certain distance from it.
  • At least the outer part of the conveyor 44 between the cooling chamber 1 and the snow and/or ice collection container 45 is mounted in a housing 46, on which a balancing valve 47 is mounted to balance the pressure inside the cooling chamber 1, whereby in the illustrated embodiment, the housing 46 passes also through the inner space of the cooling chamber 1 and extends to the body 41 of the dehumidifier 4.
  • the balancing valve 47 may be also mounted on the collection container 45, or directly on the cooling chamber 1.
  • the purifying cassette 42 comprises an outer frame 421 in which an inner frame 423 is mounted by means of flexible connectors 422. The space inside the two frames 421 and 423 is filled with a metal sieve 424.
  • the inner frame 423 of the purifying cassette 42 is coupled to an ultrasonic radiator 5 from which vibrations are transmitted to the sieve 424.
  • the radiator 5 is coupled to the machine control system for control.
  • Several purifying cassettes 42 may be arranged one after the other in the body 41 in the air flow direction.
  • the snow and/or ice conveyor 44 is formed, for example, by a screw conveyor or chain conveyor and is coupled to a known drive (not shown) which is coupled to the machine control system.
  • cooling air passes through the body 41 through the sieve 424 of the purifying cassette 42, and if it contains moisture, the moisture is deposited on the sieve 424 in the form of snow and/or ice, thereby reducing the passage cross section of the sieve 424 and decreasing its flow capacity.
  • the machine control system issues a command to move the double three-way or block valve 3 to a position in which cooling air does not enter the cooling chamber 1 but flows through the air conduits and machine components arranged upstream of the cooling chamber 1 .
  • the air flow in the cooling chamber 1 ceases and no air passes through the sieve 424 .
  • the machine control system actuates the ultrasonic radiator 5, the vibrations of which are transmitted to the sieve 424 of the purifying cassette 42 . Due the vibrations of the sieve 424, solid particles of the snow and/or ice fall off the sieve 424 and are moved by gravity to the snow and/or ice collector 43 arranged in the lower part of the body 41. Once a predetermined amount of snow and/or ice has been collected in the collector 43 or whenever snow and/or ice is removed from the sieve 424, the machine control system actuates the conveyor 44 to transfer snow and/or ice to the collection container 45 arranged outside the cooling chamber 1 . Snow and/or ice is removed from the collection container 45 as needed, preferably allowed to dissolve or is dissolved by forced heating and flows out to an adjoining waste pipe (not shown).
  • the machine control system After removing snow and/or ice from the sieve 424 of the purifying cassette 42, the machine control system stops the ultrasonic radiator 5 and moves the double three-way or block valve 3 to a working position in which air flows through the valve 3 to the cooling chamber 1, after passing through the cooling chamber 1 it passes through the dehumidifier 4 and exits from the cooling chamber 1 through the valve 3.
  • the air dehumidifier according to the invention is applicable especially in air cooling or air conditioning machines.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Drying Of Gases (AREA)
EP19215543.0A 2018-12-27 2019-12-12 Air dehumidifier, especially for air cooling or air conditioning machines Active EP3674616B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CZ2018-741A CZ308293B6 (cs) 2018-12-27 2018-12-27 Odvlhčovač vzduchu, zejména pro vzduchové chladicí nebo klimatizační stroje

Publications (2)

Publication Number Publication Date
EP3674616A1 EP3674616A1 (en) 2020-07-01
EP3674616B1 true EP3674616B1 (en) 2022-02-16

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP19215543.0A Active EP3674616B1 (en) 2018-12-27 2019-12-12 Air dehumidifier, especially for air cooling or air conditioning machines

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EP (1) EP3674616B1 (cs)
CZ (1) CZ308293B6 (cs)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CZ309374B6 (cs) * 2019-03-28 2022-10-19 Mirai Intex Sagl Řetězový dopravník pro odvádění sněhu a/nebo ledu uspořádaný v chladicí komoře vzduchového chladicího nebo klimatizačního stroje
WO2024053206A1 (ja) * 2022-09-05 2024-03-14 株式会社前川製作所 除霜器および除霜方法
JP2024035976A (ja) * 2022-09-05 2024-03-15 株式会社前川製作所 超低温冷凍システム

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019078774A1 (en) * 2017-10-20 2019-04-25 Swegon Operations Ab FLOW CONTROL ARRANGEMENT FOR AIR VENTILATION SYSTEM

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2141607C1 (ru) * 1998-08-26 1999-11-20 Дальневосточный государственный технический рыбохозяйственный университет Термоэлектрический охладитель
GB2380246B (en) * 2001-09-26 2005-03-02 Mohammed Amin Moisture removal from refrigerant
RU2200283C1 (ru) * 2001-11-28 2003-03-10 Общество с ограниченной ответственностью "Акела-Н" Адсорбер
JP2004066162A (ja) * 2002-08-08 2004-03-04 Shinohara Seiki Kk オイルミスト除去装置
JP4160415B2 (ja) * 2003-02-13 2008-10-01 カルソニックカンセイ株式会社 超臨界冷媒を用いた冷凍サイクルの着霜検出方法およびその方法を利用した除霜方法
US20080282704A1 (en) * 2004-06-02 2008-11-20 Levin Shalom Dehumidifier System Device and Method
RU2360186C1 (ru) 2007-10-12 2009-06-27 Наволоцкий Юрий Алексеевич Осушитель влажного воздуха
CN208170535U (zh) * 2018-05-14 2018-11-30 广州多乐信电器有限公司 一种自然融霜节能型除湿机

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019078774A1 (en) * 2017-10-20 2019-04-25 Swegon Operations Ab FLOW CONTROL ARRANGEMENT FOR AIR VENTILATION SYSTEM

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Publication number Publication date
CZ2018741A3 (cs) 2020-04-22
EP3674616A1 (en) 2020-07-01
CZ308293B6 (cs) 2020-04-22

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