EP0508766A2 - Procédé pour le contrôle d'une installation de conditionnement d'air et installation mettant en oeuvre le dit procédé - Google Patents

Procédé pour le contrôle d'une installation de conditionnement d'air et installation mettant en oeuvre le dit procédé Download PDF

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Publication number
EP0508766A2
EP0508766A2 EP92303146A EP92303146A EP0508766A2 EP 0508766 A2 EP0508766 A2 EP 0508766A2 EP 92303146 A EP92303146 A EP 92303146A EP 92303146 A EP92303146 A EP 92303146A EP 0508766 A2 EP0508766 A2 EP 0508766A2
Authority
EP
European Patent Office
Prior art keywords
temperature
air
condensation
heat exchanger
plant
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.)
Granted
Application number
EP92303146A
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German (de)
English (en)
Other versions
EP0508766A3 (en
EP0508766B1 (fr
Inventor
Erkki Aalto
Pekka Horttanainen
Maija Ukkonen
Harri Saukkonen
Timo Mattila
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.)
Halton Oy
Original Assignee
Halton Oy
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 Halton Oy filed Critical Halton Oy
Publication of EP0508766A2 publication Critical patent/EP0508766A2/fr
Publication of EP0508766A3 publication Critical patent/EP0508766A3/en
Application granted granted Critical
Publication of EP0508766B1 publication Critical patent/EP0508766B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F24F3/06—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 arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units
    • 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
    • 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
    • F24F11/49—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring ensuring correct operation, e.g. by trial operation or configuration checks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/22—Means for preventing condensation or evacuating condensate

Definitions

  • the invention relates to a method in the regulation of an air-conditioning plant and an air-conditioning plant according to the method.
  • a problem related to room air-conditioning plants of prior art is the condensation of water into.heat transfer pipes. Said problem causes great disadvantages, since the removal of the condensation water has not succeeded in known device solutions in the best possible way. Removal solutions of the condensation water are known in prior art, in which the condensation water is collected into a separate intermediate storage, from which it may further be led away. Separate condensation-water evaporation systems are also known.
  • the condensation of water onto said surface begins. Said situation may occur unexpectedly, e.g. when a window is opened or if a steaming kettle is brought in the room space. If the number of persons in the room to be air conditioned changes, it may also cause changes in the air of the room space, which lead into a condensation problem of water. Condensation problems occur especially in air-conditioning plants, in which the plant comprises heat transfer means for cooling the air of the room space and which air-conditioning plant comprises circulation means for the air of the room space, whereby the circulation air of the room space is led into contact with the heat transfer means.
  • a microprocessor observes said change, and when it observes at the phase-change area a change in the temperature gradient, a control signal is produced for a heat exchanger of the air-conditioning plant, preferably for fluid circulation circuit, whereby the temperature of the fluid, preferably water, of the heat exchanger is maintained or regulated above the condensation point temperature.
  • the invention tends to find a solution to the condensation problem occurring in connection with a room-space air-conditioning plant. It has been realized in the invention to avoid said problem by totally preventing the forming of the condensation water.
  • the condensation phenomenon is observed at those points of the plant, in which the condensation first occurs. When the condensation is observed, a regulation information thereof is produced into the circulation of the heat transfer fluid. In one embodiment of the invention, the water circulation is interrupted completely for the period, until the condensation phenomenon stops.
  • the inventive device solution and method does not tend to avoid secondary problems, i.e. problems related to the removal of the condensation water, but an attempt is made to prevent the entire problem by preventing the condensation of water in the plant.
  • the inventive method is mainly characterized in that in the method the condensation of water is prevented by means of a heat exchanger in connection with the surface of heat transfer means by maintaining the temperature of the heat exchanger above a momentary condensation point temperature, whereby in the method the condensation point temperature of the room space is observed experimentally, and on the basis of said experimental information, the temperature of the heat exchanger (12) of the air-conditioning plant is regulated above said observed condensation point temperature.
  • the inventive plant is many characterized in that observation devices for the condensation of water are provided, by means of which the condensation point of the air of the room space is observed, i.e. the temperature, in which the condensation of water on the surface of the heat transfer means of the air-conditioning plant occurs, and that in the method, on the basis of said condensation temperature, the temperature of the heat exchanger is regulated above the condensation point temperature.
  • Fig. 1A shows the air-conditioning plant placed in a room space.
  • Fig. 1B shows schematically the plant of Fig. 1A.
  • the condensation prevention system is described on the basis of Fig. 1B.
  • Fig. 2A shows schematically the water circulation system of the room air-conditioning plant of Fig. 1A.
  • the figure shows schematically the inventive condensation prevention system based on the water circulation regulation.
  • Fig. 2B shows the condensation-point observation equipment used in the regulation of the system of Fig. 2A.
  • Fig. 2C shows graphically the operation of the equipment of Fig. 2B as a time/temperature coordinate system.
  • Fig. 2D illustrates graphically a condensation-point calculation performed repeatedly.
  • Fig. 2E shows as a block diagram representation the inventive condensation-point observation-device arrangement.
  • Fig. 3 shows a fluid circulation diagram of the room air-conditioning plant.
  • the reflation of the water temperature of the fluid circulation occurs by adjusting a valve K of the water circulation.
  • Fig. 4 shows a second preferred embodiment of the inventive regulation.
  • Fig. 5 shows a third preferred embodiment of the inventive regulation
  • Fig. 6 shows a fourth preferred embodiment of the inventive regulation.
  • Fig. 1A shows the inventive air-conditioning plant placed in a room space.
  • Fig. 1B shows the plant of Fig 1A as a principal schematic representation.
  • room air is circulated by means of circulation created by a blower device 10.
  • the entry of the circulation air into the plant is indicated by arrows L 3A and the removal of the circulation air from the plant is indicated by arrows 3A .
  • the blower device 10 creates the room-air circulation via a filter 11 and a heat exchanger 12. Air is removed from the room space via a channel 13 (arrow L 2 ) and fresh air is brought into the room space via a channel 14 (arrow L 1 ).
  • the heat exchanger 12 may be of any type. However, a fluid and most preferably water is preferably used as a heat transfer medium.
  • Fig. 2A illustrates the regulation of the water circulation of the heat exchanger 12 of the room air-conditioning plant.
  • several room air-conditioning plants 10 are coupled to the same water circulation system.
  • the heating/cooling arrangement of the plant is realized by means of water circulation.
  • the figure shows three room air-conditioning plants 10. They are located in different room spaces, i.e. in room spaces H 1 , H 2 , H 3 .
  • the heat transfer fluid preferably water
  • the heat transfer fluid is circulated by bringing it into the heat exchanger 12, as shown by an arrow V 1 , and by removing it from the heat exchanger 12, as shown by an arrow V 2 .
  • the fluid flow may be, according to each plant, regulated by means of a valve K.
  • the inlet water flow V 1 is brought from a heating unit C 1 or from a cooling unit C 2 of a central device F depending on the fact, whether heat is removed from the room H 1 , H 2 , H 3 or whether heat is brought via the heat exchanger into the room space.
  • the heat transfer medium preferably water, of frame channels R 1 , R 2 is circulated either to the heating unit C 1 or via the cooling unit C 2 .
  • the heating and cooling units C 1 and C 2 are located in the central device F.
  • Fig. 2A illustrates the condensation temperature by a condensation-temperature observation device 15.
  • the embodiment of the figure illustrates the condensation temperature in a room space such that the observation device 15 comprises a surface, with which the room air is in contact, and a temperature element in contact with said surface, the temperature of which element is increased and/or decreased at the same heat effect.
  • the equipment further comprises a central unit, preferably a microprocessor, which observes the temperature change per time unit occurring in the temperature elements, and when an abrupt change occurs in the temperature gradient, i.e. in the temperature increase or decrease per time unit, a control information is produced thereof further to the control of the heat exchanger 12 for maintaining the temperature above a condensation point temperature T k .
  • a control information is produced for the valve K, or generally into the heat-transfer-fluid circulation system, whereby the temperature of the heat transfer fluid, preferably water, is adjusted above the above-mentioned observed condensation point temperature T k .
  • Fig. 2B shows the inventive observation and indicator device 15 observing the condensation point temperature.
  • the observation device 15 comprises a temperature element C and a heat-transfer and test surface D, between which prevails a thermal contact.
  • the temperature of the temperature element is increased or decreased by bringing a constant heating or cooling effect into the temperature element C, whereby the increase or decrease in temperature per time unit of the temperature element C is observed, and when a change occurs in said temperature gradient when reaching the condensation point temperature T k , a control information thereof is produced to a central unit 100, preferably a microprocessor.
  • the microprocessor 100 further adjusts the temperature of the heat exchanger 12 of the air-conditioning plant 10, preferably the temperature of the heating fluid when using fluid circulation, such that it is above the observed condensation point temperature T k .
  • the method utilizes such an observation device, which, on the basis of a phase change occurring in the condensation point, adjusts the temperature of the heat exchanger 12 of the air-conditioning plant 10 above the condensation point temperature point T k observed.
  • the above-mentioned adjustment may occur, when the heat exchanger 12 is provided with fluid circulation, by adjusting the temperature of the fluid circulation above the condensation point temperature. Said adjustment may occur e.g. by closing for a certain period of time the valve K of the fluid circulation, whereby the temperature of the heat transfer fluid in the heat exchanger increases.
  • Fig. 2C shows the inventive test arrangement.
  • the temperature T of the temperature element In the vertical coordinate system is shown the temperature T of the temperature element, and in the horizontal coordinate system is shown the time t.
  • the condensation point temperature T k At the time t k is reached the condensation point temperature T k , whereby energy is bound to the phase change and the temperature decrease of the element C decelerates and the temperature gradient thus changes.
  • the inventive test may be performed either by increasing or decreasing the temperature T of the temperature element C. It is then essential that the condensation point temperature T k is by-passed in the change range of the temperature of the temperature element C.
  • Fig. 2D shows a test arrangement performed during several periods of time. The test may be performed at certain time intervals or continuously, since the condensation point changes according to the changing of the atmosphere conditions of the room H.
  • Fig. 2E shows as a block diagram representation the inventive condensation-point observation arrangement.
  • the temperature difference between a test surface P of the condensation-point indicator and the temperature element C to be cooled is regulated by cooling/heating the temperature element C at a constant effect.
  • the indicator G produces a temperature communication from the temperature element C to the microprocessor 100, which observes the temperature change of the temperature element C as a function of time and produces a control information to the control circuit of the heat exchanger 12 of the air-conditioning plant 10, preferably to the circulation circuit of the heat transfer fluid, which control information is based on the momentary and last-measured condensation-point temperature information T k of the room space H.
  • the microprocessor 100 transmits the control communications to the process.
  • the power supply circuit supplies power to the microprocessor as well as to the power regulation circuit.
  • Fig. 3 shows schematically a solution, in which several room air-conditioning plants 10 are coupled to the same water circulation system. By means of the water circulation is realized the heating/cooling arrangement of the plant.
  • the figure shows three room air-conditioning plants 10. They are located in different room spaces H 1 , H 2 , H 3 .
  • the heat transfer fluid preferably water
  • the heat transfer fluid is circulated by bringing it into the heat exchanger 12, as shown by an arrow V 1 , and by removing it from the heat exchanger 12, as shown by an arrow V 2 .
  • the fluid flow may be, according to each plant, regulated by means of a valve K.
  • the inlet flow V 1 is brought from a heating unit C 1 or from a cooling unit C 2 of a central unit F depending on the fact, whether heat is removed from the room H 1 , H 2 , H 3 or whether heat is brought via the heat exchanger into the room space.
  • the heat transfer medium preferably water
  • the heating and cooling units C 1 and C 2 are located in the central device F.
  • the water circulation of the heat exchanger 12 of each plant 10 is regulated by means of the condensation observation device 15.
  • the central unit 17 further controls the temperature of the heat exchanger 12 and preferably closes the water-circulation valve K The control information of the valve K is transmitted from the central unit 17 to the valve K along the signal line 16b.
  • the valve K is shut immediately. This also prevents the condensation, since the cooling water and its circulation stops and the cooling liquid and thereby the temperature of the cooling pipe exceeds the condensation point temperature.
  • each room air-conditioning plant 10 and the circulation of heat transfer fluid of the room air-conditioning plant 10 are regulated, which is based on the above-mentioned observation of the water condensed.
  • Fig. 4 shows a second preferred embodiment of the inventive condensation observation device.
  • the fluid condensed on the surface of the water-circulation inlet pipe is observed optically.
  • a light-refracting prism 18 and a ray of light X are provided, which is controlled from a light source 19 in compliance with the surface of a heat transfer pipe O towards the prism 18.
  • the prism 18 diffracts the ray of light F further into a receiving detector 20, which measures the signal received.
  • Fig. 5 shows a third preferred, also optical embodiment of the inventive plant, in which a ray of light X is produced optically from a light source 19 via an optical fiber into the vicinity of the heat transfer pipe O and in which it is led in compliance with the pipe to a receiving detector 22.
  • a condensation water drop scatters a ray of light, whereby an information in the receiving detector 22 changes and the change is observed in the central unit 17, which further stops the heat transfer fluid the circulation.
  • Fig. 6 shows a fourth preferred embodiment of the invention, in which an electrical sensor 23 measuring the capacitance is placed in the vicinity of the heat transfer pipe O.
  • an electrical sensor 23 measuring the capacitance is placed in the vicinity of the heat transfer pipe O.
  • the operation of the air-conditioning plant 10 may be made more effective.
  • a lower inlet water temperature may be used.
  • a lower inlet water temperature may be used, since the condensation of water is fully in control by means of the inventive plant, and it is not necessary to minimize at the air-conditioning plant the probability of condensation by cutting the minimum values of the inlet water temperature.
  • water flows can thus be decreased and led into smaller pipes.
  • the costs of the piping are thus reduced to a minimum.
  • No condensation water tank is needed. Also, it is not necessary to insulate the pipes, which in the solutions of prior art was a way of avoiding the condensation of water onto the pipe surfaces.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Conditioning Control Device (AREA)
  • Control Of Steam Boilers And Waste-Gas Boilers (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Amplifiers (AREA)
  • Control Of El Displays (AREA)
EP92303146A 1991-04-09 1992-04-09 Procédé pour le contrÔle d'une installation de conditionnement d'air et installation mettant en oeuvre le dit procédé Expired - Lifetime EP0508766B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI911692 1991-04-09
FI911692A FI88650C (fi) 1991-04-09 1991-04-09 Foerfarande vid reglering av en luftkonditioneringsanlaeggning och en luftkonditioneringsanlaeggning enligt detta foerfarande

Publications (3)

Publication Number Publication Date
EP0508766A2 true EP0508766A2 (fr) 1992-10-14
EP0508766A3 EP0508766A3 (en) 1993-05-05
EP0508766B1 EP0508766B1 (fr) 1996-01-03

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EP92303146A Expired - Lifetime EP0508766B1 (fr) 1991-04-09 1992-04-09 Procédé pour le contrÔle d'une installation de conditionnement d'air et installation mettant en oeuvre le dit procédé

Country Status (4)

Country Link
EP (1) EP0508766B1 (fr)
AT (1) ATE132610T1 (fr)
DE (1) DE69207252T2 (fr)
FI (1) FI88650C (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995004902A1 (fr) * 1993-08-10 1995-02-16 Abb Installaatiot Oy Systeme de refroidissement de l'air souffle dans une installation de climatisation
DE4409866A1 (de) * 1994-01-27 1995-08-03 Landis & Gyr Business Support Verfahren zur Steuerung einer Kühleinrichtung und Sensor zur Durchführung des Verfahrens
WO1996005473A1 (fr) * 1994-08-08 1996-02-22 Van Holsteijn & Kemna Special Products B.V. Systeme de chauffage, de refroidissement et de ventilation et unite de conditionnement d'air d'une piece pour un tel systeme
AT401113B (de) * 1994-01-26 1996-06-25 Vaillant Gmbh Verfahren zum kondensatfreien betreiben eines umlaufwasserheizers
ES2158756A1 (es) * 1997-11-29 2001-09-01 Samsung Electronics Co Ltd Procedimiento para controlar la velocidad de un ventilador de evaporador de acondicionador de aire.
EP1788328A2 (fr) * 2005-11-17 2007-05-23 KERMI GmbH Méthode d'approvisionnement et de décharge d'un réfrigérant vers et depuis une unité utilisatrice génératrice de pertes thermiques
FR2908873A1 (fr) * 2006-11-22 2008-05-23 Jean Denis Budin Refroidissement par circulation d'un fluide
WO2013030080A2 (fr) 2011-08-31 2013-03-07 Mentus Holding Ag Procédé pour faire fonctionner un appareil échangeur de chaleur liquide-air
NO341901B1 (no) * 2008-05-06 2018-02-19 Flaekt Woods Ab Fremgangsmåte for å kjøle tilførselsluft
CN107957129A (zh) * 2017-11-29 2018-04-24 海信（山东）空调有限公司 一种风管机接水盘限位卡板及风管机

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011119315B4 (de) * 2011-11-23 2013-06-06 Robert Bosch Gmbh Verfahren zum Regeln einer Heizungs-, Kühlungs- und/oder Klimatisierungsanlage
CN112611075B (zh) * 2020-11-26 2021-12-10 珠海格力电器股份有限公司 一种定频空调、控制器、防凝露控制方法及存储介质

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3385350A (en) * 1966-02-25 1968-05-28 Carrier Corp Air conditioning apparatus including condensate preventing means
US4513577A (en) * 1982-11-19 1985-04-30 Wilson Neill R Evaporator and method of operation
US4526011A (en) * 1983-03-03 1985-07-02 Control Data Corporation Dew point sensitive computer cooling system
WO1986001144A1 (fr) * 1984-08-07 1986-02-27 Gottfried Amann & Sohn Ges.M.B.H. & Co. Procede et dispositif anti-condensation sur des outils refroidis de machines a travailler les plastiques
WO1986004553A1 (fr) * 1985-02-05 1986-08-14 Hoelter Heinz Cabine servant au sejour de personnes

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3385350A (en) * 1966-02-25 1968-05-28 Carrier Corp Air conditioning apparatus including condensate preventing means
US4513577A (en) * 1982-11-19 1985-04-30 Wilson Neill R Evaporator and method of operation
US4526011A (en) * 1983-03-03 1985-07-02 Control Data Corporation Dew point sensitive computer cooling system
WO1986001144A1 (fr) * 1984-08-07 1986-02-27 Gottfried Amann & Sohn Ges.M.B.H. & Co. Procede et dispositif anti-condensation sur des outils refroidis de machines a travailler les plastiques
WO1986004553A1 (fr) * 1985-02-05 1986-08-14 Hoelter Heinz Cabine servant au sejour de personnes

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995004902A1 (fr) * 1993-08-10 1995-02-16 Abb Installaatiot Oy Systeme de refroidissement de l'air souffle dans une installation de climatisation
US5931017A (en) * 1993-08-10 1999-08-03 Abb Installaatiot Oy Arrangement for cooling supply air in an air-conditioning installation
AT401113B (de) * 1994-01-26 1996-06-25 Vaillant Gmbh Verfahren zum kondensatfreien betreiben eines umlaufwasserheizers
DE4409866A1 (de) * 1994-01-27 1995-08-03 Landis & Gyr Business Support Verfahren zur Steuerung einer Kühleinrichtung und Sensor zur Durchführung des Verfahrens
DE4409866C2 (de) * 1994-01-27 1998-05-20 Landis & Gyr Business Support Elektrischer Feuchtigkeitssensor
WO1996005473A1 (fr) * 1994-08-08 1996-02-22 Van Holsteijn & Kemna Special Products B.V. Systeme de chauffage, de refroidissement et de ventilation et unite de conditionnement d'air d'une piece pour un tel systeme
ES2158756A1 (es) * 1997-11-29 2001-09-01 Samsung Electronics Co Ltd Procedimiento para controlar la velocidad de un ventilador de evaporador de acondicionador de aire.
EP1788328A3 (fr) * 2005-11-17 2008-05-21 KERMI GmbH Méthode d'approvisionnement et de décharge d'un réfrigérant vers et depuis une unité utilisatrice génératrice de pertes thermiques
EP1788328A2 (fr) * 2005-11-17 2007-05-23 KERMI GmbH Méthode d'approvisionnement et de décharge d'un réfrigérant vers et depuis une unité utilisatrice génératrice de pertes thermiques
FR2908873A1 (fr) * 2006-11-22 2008-05-23 Jean Denis Budin Refroidissement par circulation d'un fluide
NO341901B1 (no) * 2008-05-06 2018-02-19 Flaekt Woods Ab Fremgangsmåte for å kjøle tilførselsluft
WO2013030080A2 (fr) 2011-08-31 2013-03-07 Mentus Holding Ag Procédé pour faire fonctionner un appareil échangeur de chaleur liquide-air
CH705453A1 (de) * 2011-08-31 2013-03-15 Mentus Holding Ag Verfahren zum Betrieb eines Flüssigkeit-Luft-Wärmeaustauschgeräts.
WO2013030080A3 (fr) * 2011-08-31 2013-06-06 Mentus Holding Ag Procédé pour faire fonctionner un appareil échangeur de chaleur liquide-air
CN103765121A (zh) * 2011-08-31 2014-04-30 门图斯控股集团公司 用于运行液体-空气热量交换设备的方法
JP2014529054A (ja) * 2011-08-31 2014-10-30 メンタス ホールディング エージー 気液熱交換器の作動方法
CN107957129A (zh) * 2017-11-29 2018-04-24 海信（山东）空调有限公司 一种风管机接水盘限位卡板及风管机

Also Published As

Publication number Publication date
FI88650C (fi) 1993-06-10
EP0508766A3 (en) 1993-05-05
FI911692A0 (fi) 1991-04-09
DE69207252D1 (de) 1996-02-15
FI911692A (fi) 1992-10-10
EP0508766B1 (fr) 1996-01-03
FI88650B (fi) 1993-02-26
DE69207252T2 (de) 1996-05-30
ATE132610T1 (de) 1996-01-15

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