EP2516934A1 - A method and an apparatus in a ventilation system - Google Patents

A method and an apparatus in a ventilation system

Info

Publication number
EP2516934A1
EP2516934A1 EP10839878A EP10839878A EP2516934A1 EP 2516934 A1 EP2516934 A1 EP 2516934A1 EP 10839878 A EP10839878 A EP 10839878A EP 10839878 A EP10839878 A EP 10839878A EP 2516934 A1 EP2516934 A1 EP 2516934A1
Authority
EP
European Patent Office
Prior art keywords
supply air
condensate
heat exchanger
humidity
aerosol
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Withdrawn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
EP10839878A
Other languages
German (de)
French (fr)
Other versions
EP2516934A4 (en
Inventor
Peter Wallin
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.)
R-VENT GROUP B.V.
Original Assignee
Climate Recovery Ind AB
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 Climate Recovery Ind AB filed Critical Climate Recovery Ind AB
Publication of EP2516934A1 publication Critical patent/EP2516934A1/en
Publication of EP2516934A4 publication Critical patent/EP2516934A4/en
Withdrawn legal-status Critical Current

Links

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
    • F24F3/147—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 with both heat and humidity transfer between supplied and exhausted air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F6/00—Air-humidification, e.g. cooling by humidification
    • F24F6/02—Air-humidification, e.g. cooling by humidification by evaporation of water in the air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F12/00—Use of energy recovery systems in air conditioning, ventilation or screening
    • F24F12/001—Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted air
    • F24F12/006—Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted air using an air-to-air heat exchanger
    • 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
    • F24F13/222—Means for preventing condensation or evacuating condensate for evacuating condensate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F6/00—Air-humidification, e.g. cooling by humidification
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F6/00—Air-humidification, e.g. cooling by humidification
    • F24F6/12—Air-humidification, e.g. cooling by humidification by forming water dispersions in the air
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/56—Heat recovery units

Definitions

  • the present invention relates to a method, in a ventilation system, of transferring heat and humidity from departing exhaust air to incoming supply air, and comprises the steps that heat is extracted from the exhaust air in an exhaust air side of a heat exchanger, that the extracted heat is at least partly transferred to the supply air in a supply air side of a heat exchanger, and that humidity carried by the exhaust air is bonded in the exhaust air side and at least partly transferred to the supply air.
  • the present invention also relates to an apparatus, in a ventilation system, for transferring heat and humidity from departing exhaust air to incoming supply air, and comprises a heat exchanger with a supply air side and an exhaust air side, and means for bonding humidity and at least partly transferring this humidity to the supply air.
  • the humidity migrates through the wall and is supplied, at least partly, to the supply air.
  • a heat exchanger of this type cannot be regulated as regards the humidification of the supply air, for which reason major problems may occur in certain weather conditions. Further, the transfer of humidity in a heat exchanger of this type is incomplete as the major part of the condensation takes place in the coldest part of the heat exchanger where the air on the opposite side of the heat exchanger wall due to the low temperature has a bad ability to absorb humidity.
  • the present invention has for its object to formulate the method intimated by way of introduction so that a humidification of the supply air may take place utilising the thermal content of the exhaust air for vaporisation.
  • the present invention further has for its object to formulate the method so as to ensure good possibilities of accurate regulation of the relative humidity in the supply air, and also in addition good possibilities for cleaning.
  • the present invention has for its object to design the apparatus so that analogous objects will be attained.
  • the objects forming the basis of the present invention will be attained concerning the method if this is characterised in that the humidity is bonded by condensation in the exhaust air side of the heat exchanger, that the precipitated condensate is accumulated, that at least a part of the condensate is atomised to form a mist or aerosol of minute airborne water particles in the liquid phase and is supplied to the supply air in or at the supply air side of the heat exchanger.
  • the means for bonding and transferring humidity comprise a condensation surface in the exhaust air side which is cooled by the supply air, accumulation and conduction means for accumulating the condensate, an atomiser for atomising or finely dividing the condensate into a mist or aerosol of minute, airborne water particles in the liquid phase, the accumulation and conduction means being disposed to emit condensate to the atomiser.
  • Fig. 1 is a schematic view of a prior art heat exchanger
  • Fig. 2 shows the heat exchanger according to Fig. 1 , but modified according to the present invention.
  • Fig. 3 shows a lower region of a slightly modified embodiment of the heat
  • reference numeral 1 relates to a heat exchanger which operates in counter flow and which has an exhaust air side 2 and a supply air side 3.
  • the exhaust air side may also be entitled the warm side of the heat exchanger and the supply air side be entitled its cold side.
  • the exhaust air 4 flows in accordance with the arrows from above and downwards in the Figure from an exhaust air inlet 5 to an exhaust air outlet 6.
  • the supply air 7 flows according to the broken line arrows in a direction from beneath from a supply air inlet 8 in an upward direction to a supply air outlet 9.
  • the partition 10 between the exhaust air side 2 and the supply air side 3 consists of a thermally conductive material, which is gas-tight and impermeable to water, such as copper, aluminium or certain plastics qualities.
  • the wall thickness of the partition is so slight that the wall may be designated a foil.
  • the incoming supply air 7 at the supply air inlet 8 is at 0°C and has a relative humidity of 80%, at least the lower regions of the partition in the Figure will have a temperature in the proximity of 0°. If the incoming exhaust air is then assumed to be at a temperature of 22°C and has a relatively humidity of approx. 50%, a
  • the partition also constitutes a condensation surface, where reference numeral 12 intimates droplets of deposited condensate, i.e. distilled water.
  • reference numeral 12 intimates droplets of deposited condensate, i.e. distilled water.
  • the air departing from the supply air outlet 9 will be at a temperature in the proximity of 20°C, but will have a relative humidity which has fallen drastically from the original 80% to a level of the order of magnitude of 20%.
  • the heat exchanger according to Fig. 1 has been supplemented for application of the present invention. Corresponding parts and details carry corresponding reference numerals in both Figures.
  • the accumulator 11 terminates in a vent for accommodating the condensate.
  • an atomiser 15 which possesses the property of atomising or finely dividing water in the liquid phase into extremely minute, air-borne particles in the liquid phase.
  • the atomiser emits a fine water mist or aerosol 13, where the individual water particles are so small that they do not adhere to those surfaces which the particles may possibly come into contact with, and further the particles remain floating in the air for lengthy periods of time.
  • the atomiser 15 is in communication with the accumulator 11 , so that at least a part of the condensate may be transferred over to the atomiser 15 via its inlet 14.
  • the outlet of the atomiser 15 for mist or aerosol 13 is positioned at the inlet 8 to the supply air side 3 of the heat exchanger, the floating water particles in the mist or aerosol 13 will accompany the flow according to the arrows 7 so that the temperature is gradually raised and so that vaporisation of the minute water particles takes place.
  • the vapour generation heat is taken from the heat that is emitted from the exhaust air 4 in the exhaust air side 2 of the heat exchanger.
  • the process may be controlled in such a manner that no water particles in the liquid phase remain in the supply air 7 at its outlet 9.
  • the advantage will be afforded that bacteria cannot be spread into the space in which the supply air is emitted.
  • the above-disclosed temperature and humidity conditions are representative of a winter climate in southern Sweden. During other annual seasons, there may be a reason not to humidify the incoming outdoor air 7 to the same extent as during the winter climate. For this reason, the communication between the accumulator 11 and the atomiser 15, in particular its inlet 14, is provided with regulator equipment by means of which the flow can be regulated or completely throttled.
  • the atomiser 15 proper is connected to a regulator system by means of which the emitted quantity of mist or aerosol per unit of time may be governed in response to the relative humidity in the space in which the supply air is emitted.
  • the atomiser 15 may be of a plurality of different types and include an atomiser nozzle which is supplied with water at high pressure. Another alternative may be to atomise or finely divide incoming water into the relevant mist or aerosol with the aid of compressed air, or with the aid of a rotary disk or a cup. However, the most practical form of atomiser would probably seem to be an atomiser including a piezoelectric plate 16 which is energised with high frequency a.c. voltage. Regardless of the method of operation of the atomiser 15, it is important that the airborne water particles be minute, less than 100 ⁇ , and preferably of the order of magnitude of between 3 and 20 ⁇ .
  • the water with which the atomiser 15 is supplied is a condensate, it is free of dissolved salts such as those that normally occur in mains water. This implies that no precipitation of salt particles in the air can take place, since the condensate is pure distilled water.
  • Fig. 3 shows, on a larger scale, the lower region of heat exchanger designed with an example of a piezoelectric atomiser 15.
  • the piezoelectric plate has been given reference numeral 16, while its connection terminals to a source of a.c. voltage are not shown.
  • the accumulator and conductor means 11 and 14 have further been given a slightly different constructive design than that which is shown in Fig. 2. It will be apparent from Fig. 3 that a level adjustment may take place in the water container 17 which is included in the atomiser 15. In addition, the departing water mist or aerosol is shown by means of the arrows 13.
  • mist or aerosol distributor 18 which spreads the mist or aerosol and creates turbulence.

Abstract

A method for recovering heat and humidity in a ventilation system comprises the steps of cooling warm and humid exhaust air (4) at a condensation surface (10) in a heat exchanger (1) and collecting the condensate(12) as formed, heating dry and cold supply air (7) at the opposite side of the condensation surface (10) and atomizing the condensate (12) and supplying the atomized condensate to the supply air (7) at the supply air inlet (8) of the heat exchanger (1). The atomizing is generated by means of a piezoelectric atomizer (15). A device for recovering heat and humidity in a heat exchanger (1) in a ventilation system comprises a condensation surface (10) at the exhaust air side (2) of the heat exchanger (1) and a collection device (11, 14) for condensate (12). At the inlet (8) of the supply air side (3) of the heat exchanger (1) there is provided a piezoelectric atomizer (15) that is fed with the condensate (12) for supplying atomized condensate (13) to the inlet (8).

Description

A METHOD AND AN APPARATUS IN A VENTILATION SYSTEM
TECHNICAL FIELD The present invention relates to a method, in a ventilation system, of transferring heat and humidity from departing exhaust air to incoming supply air, and comprises the steps that heat is extracted from the exhaust air in an exhaust air side of a heat exchanger, that the extracted heat is at least partly transferred to the supply air in a supply air side of a heat exchanger, and that humidity carried by the exhaust air is bonded in the exhaust air side and at least partly transferred to the supply air.
The present invention also relates to an apparatus, in a ventilation system, for transferring heat and humidity from departing exhaust air to incoming supply air, and comprises a heat exchanger with a supply air side and an exhaust air side, and means for bonding humidity and at least partly transferring this humidity to the supply air.
BACKGROUND ART
In the ventilation of dwellings, use is nowadays almost exclusively made of balanced ventilation where, with the aid of an exhaust air fan, exhaust air is accumulated from the various spaces of the dwelling at a heat exchanger which, with the aid of a supply air fan, is fed with supply air which is taken from outdoors and, after heating in the heat exchanger, is fed to the spaces in the dwelling. If, in such an installation, an outdoor temperature of 0°C were to prevail and a relative humidity of 80%, this outdoor air contains, in absolute terms, very little water, of the order of magnitude of 4g/m3. If this outdoor air is then heated to room temperature, for example 22°C, the relative humidity will, after the heating, fall to approx. 20% which is far too low a level.
On the other hand, indoor air at a temperature of 22° and having a 50% relative humidity contains approx. 10g/m3. If this warm and humid air is cooled to 0°C, this implies that approx. 6g of water per m3 precipitates as condensate. Normally, this condensate is led off to a vent. If humidification of the heated outdoor air is to take place, this implies quite a considerable supply of energy, since the water thus supplied must be vaporised by the supply of vaporisation heat. Heat exchangers are previously known in the art where the partition between the warm and cold side of the heat exchanger is permeable to humidity and, for example, may contain a salt that binds the humidity. The humidity migrates through the wall and is supplied, at least partly, to the supply air. A heat exchanger of this type cannot be regulated as regards the humidification of the supply air, for which reason major problems may occur in certain weather conditions. Further, the transfer of humidity in a heat exchanger of this type is incomplete as the major part of the condensation takes place in the coldest part of the heat exchanger where the air on the opposite side of the heat exchanger wall due to the low temperature has a bad ability to absorb humidity.
PROBLEM STRUCTURE
The present invention has for its object to formulate the method intimated by way of introduction so that a humidification of the supply air may take place utilising the thermal content of the exhaust air for vaporisation. The present invention further has for its object to formulate the method so as to ensure good possibilities of accurate regulation of the relative humidity in the supply air, and also in addition good possibilities for cleaning.
Concerning the apparatus, the present invention has for its object to design the apparatus so that analogous objects will be attained.
SOLUTION
The objects forming the basis of the present invention will be attained concerning the method if this is characterised in that the humidity is bonded by condensation in the exhaust air side of the heat exchanger, that the precipitated condensate is accumulated, that at least a part of the condensate is atomised to form a mist or aerosol of minute airborne water particles in the liquid phase and is supplied to the supply air in or at the supply air side of the heat exchanger.
The objects forming the basis of the present invention will be attained in respect of the apparatus if this is characterised in that the means for bonding and transferring humidity comprise a condensation surface in the exhaust air side which is cooled by the supply air, accumulation and conduction means for accumulating the condensate, an atomiser for atomising or finely dividing the condensate into a mist or aerosol of minute, airborne water particles in the liquid phase, the accumulation and conduction means being disposed to emit condensate to the atomiser.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
The present invention will now be described in greater detail hereinbelow, with reference to the accompanying Drawings. In the accompanying Drawings:
Fig. 1 is a schematic view of a prior art heat exchanger;
Fig. 2 shows the heat exchanger according to Fig. 1 , but modified according to the present invention; and
Fig. 3 shows a lower region of a slightly modified embodiment of the heat
exchanger according to Fig. 2.
DESCRIPTION OF PREFERRED EMBODIMENT
In Fig. 1, reference numeral 1 relates to a heat exchanger which operates in counter flow and which has an exhaust air side 2 and a supply air side 3. The exhaust air side may also be entitled the warm side of the heat exchanger and the supply air side be entitled its cold side. The exhaust air 4 flows in accordance with the arrows from above and downwards in the Figure from an exhaust air inlet 5 to an exhaust air outlet 6.
Correspondingly, the supply air 7 flows according to the broken line arrows in a direction from beneath from a supply air inlet 8 in an upward direction to a supply air outlet 9. The partition 10 between the exhaust air side 2 and the supply air side 3 consists of a thermally conductive material, which is gas-tight and impermeable to water, such as copper, aluminium or certain plastics qualities. The wall thickness of the partition is so slight that the wall may be designated a foil.
If it is assumed that the incoming supply air 7 at the supply air inlet 8 is at 0°C and has a relative humidity of 80%, at least the lower regions of the partition in the Figure will have a temperature in the proximity of 0°. If the incoming exhaust air is then assumed to be at a temperature of 22°C and has a relatively humidity of approx. 50%, a
condensation will take place against the partition 10, at least at its lower regions. As a result, the partition also constitutes a condensation surface, where reference numeral 12 intimates droplets of deposited condensate, i.e. distilled water. At the disclosed humidity and temperature conditions, as much as 6g of water per m3 of through- flowing exhaust air may be precipitated out in the form of a condensate which is accumulated in an accumulator 1 1 and which has hitherto traditionally been led off to a vent. With the above-disclosed temperature and humidity conditions, the air departing from the supply air outlet 9 will be at a temperature in the proximity of 20°C, but will have a relative humidity which has fallen drastically from the original 80% to a level of the order of magnitude of 20%. In Fig. 2, the heat exchanger according to Fig. 1 has been supplemented for application of the present invention. Corresponding parts and details carry corresponding reference numerals in both Figures.
In the embodiment according to Fig.1, the accumulator 11 terminates in a vent for accommodating the condensate. In the embodiment according to Fig. 2, there has been provided an atomiser 15 which possesses the property of atomising or finely dividing water in the liquid phase into extremely minute, air-borne particles in the liquid phase. Thus, the atomiser emits a fine water mist or aerosol 13, where the individual water particles are so small that they do not adhere to those surfaces which the particles may possibly come into contact with, and further the particles remain floating in the air for lengthy periods of time. In addition, the atomiser 15 is in communication with the accumulator 11 , so that at least a part of the condensate may be transferred over to the atomiser 15 via its inlet 14. In that the outlet of the atomiser 15 for mist or aerosol 13 is positioned at the inlet 8 to the supply air side 3 of the heat exchanger, the floating water particles in the mist or aerosol 13 will accompany the flow according to the arrows 7 so that the temperature is gradually raised and so that vaporisation of the minute water particles takes place. In such instance, the vapour generation heat is taken from the heat that is emitted from the exhaust air 4 in the exhaust air side 2 of the heat exchanger.
Given that the atomiser 15 is positioned in the illustrated manner, the process may be controlled in such a manner that no water particles in the liquid phase remain in the supply air 7 at its outlet 9.
As a result, the advantage will be afforded that bacteria cannot be spread into the space in which the supply air is emitted. The above-disclosed temperature and humidity conditions are representative of a winter climate in southern Sweden. During other annual seasons, there may be a reason not to humidify the incoming outdoor air 7 to the same extent as during the winter climate. For this reason, the communication between the accumulator 11 and the atomiser 15, in particular its inlet 14, is provided with regulator equipment by means of which the flow can be regulated or completely throttled. Correspondingly, the atomiser 15 proper is connected to a regulator system by means of which the emitted quantity of mist or aerosol per unit of time may be governed in response to the relative humidity in the space in which the supply air is emitted. The atomiser 15 may be of a plurality of different types and include an atomiser nozzle which is supplied with water at high pressure. Another alternative may be to atomise or finely divide incoming water into the relevant mist or aerosol with the aid of compressed air, or with the aid of a rotary disk or a cup. However, the most practical form of atomiser would probably seem to be an atomiser including a piezoelectric plate 16 which is energised with high frequency a.c. voltage. Regardless of the method of operation of the atomiser 15, it is important that the airborne water particles be minute, less than 100μ, and preferably of the order of magnitude of between 3 and 20 μ.
Given that the water with which the atomiser 15 is supplied is a condensate, it is free of dissolved salts such as those that normally occur in mains water. This implies that no precipitation of salt particles in the air can take place, since the condensate is pure distilled water.
Fig. 3 shows, on a larger scale, the lower region of heat exchanger designed with an example of a piezoelectric atomiser 15. In the Figure, the piezoelectric plate has been given reference numeral 16, while its connection terminals to a source of a.c. voltage are not shown. In Fig. 3, the accumulator and conductor means 11 and 14 have further been given a slightly different constructive design than that which is shown in Fig. 2. It will be apparent from Fig. 3 that a level adjustment may take place in the water container 17 which is included in the atomiser 15. In addition, the departing water mist or aerosol is shown by means of the arrows 13.
In order to distribute the departing water mist or aerosol 13 as thoroughly as possible in the entire air flow in the incoming supply air 7, there is provided at the inlet 8 of the supply air side a mist or aerosol distributor 18 which spreads the mist or aerosol and creates turbulence.

Claims

1. In a ventilation system, a method of transferring heat and humidity from departing exhaust air (4) to incoming supply air (7), comprising the steps:
that heat is extracted from the exhaust air in an exhaust air side (2) in a heat exchanger (1),
that the extracted heat is at least partly transferred to the supply air (7) in a supply air side (3) of the heat exchanger, and
that humidity carried by the exhaust air is bonded in the exhaust air side and at least partly supplied to the supply air, characterised in that the humidity is bonded by condensation (12) in the exhaust air side (2) of the heat exchanger (1),
that precipitated condensation is accumulated, and
that at least a part of the condensate is atomised or finely-divided into a mist or aerosol (13) of minute air-borne water particles in the liquid phase and is supplied to the supply air (7) in or at the supply air side (3) of the heat exchanger (1).
2. The method as claimed in Claim 1, characterised in that the mist or aerosol (13) is supplied at the inlet (8) to the supply air side (3) of the heat exchanger
(1).
3. The method as claimed in Claim 1 or 2, characterised in that the water particles of the mist or aerosol (13) are given a size < 100μ, preferably of the order of magnitude of between 20 and 3μ.
4. The method as claimed in any of Claims 1 to 3, characterised in that the mist or aerosol (13) is generated by means of a piezoelectric plate (16) which is held immersed in the condensate and which is driven by means of a high frequency a.c. voltage.
5. The method as claimed in any of Claims 1 to 4, characterised in that the supply of mist or aerosol (13) is regulated in response to the relative humidity in the space in which the supply air is emitted.
6. An apparatus, in a ventilation system, for transferring heat and humidity from departing exhaust air (4) to incoming supply air (7), comprising: a heat exchanger (1) with a supply air side (3) and an exhaust air side (2), and means for bonding humidity and at least partly transferring same to the supply air, characterised in that said means for bonding and transferring humidity comprise a condensation surface (10) in the exhaust air side (2) cooled by the supply air (7), accumulation and conduction means (11, 14) for accumulating the condensate, an atomiser (15) for atomising or finely-dividing the condensate into a mist or aerosol (13) of minute, air-borne water particles in the liquid phase, the accumulation and conduction means being disposed to emit the condensate to the atomiser.
7. The apparatus as claimed in Claim 6, characterised in that the outlet of the atomiser (15) for mist or aerosol (13) is in flow communication with the inlet region (8) of the supply air side (3).
8. The apparatus as claimed in Claim 6 or 7, characterised in that the atomiser (15) includes a piezoelectric plate (16) which is in conductive communication with a source of high frequency a.c. voltage.
9. The apparatus as claimed in any of Claims 6 to 8, characterised by a regulator device which, as an input signal, utilises the relative humidity or a parameter representative thereof in that space in which the supply air is emitted, and which is operative to control the operation of the atomiser (15) or the supply of condensate thereto for regulating the relative humidity in that space in which the supply air is emitted, to a level which is perceived by humans as agreeable.
EP10839878.5A 2009-12-21 2010-12-07 A method and an apparatus in a ventilation system Withdrawn EP2516934A4 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0901592A SE534398C2 (en) 2009-12-21 2009-12-21 Method and apparatus of a ventilation device
PCT/SE2010/000288 WO2011078757A1 (en) 2009-12-21 2010-12-07 A method and an apparatus in a ventilation system

Publications (2)

Publication Number Publication Date
EP2516934A1 true EP2516934A1 (en) 2012-10-31
EP2516934A4 EP2516934A4 (en) 2018-04-18

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EP (1) EP2516934A4 (en)
SE (1) SE534398C2 (en)
WO (1) WO2011078757A1 (en)

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WO2011078757A1 (en) 2011-06-30
US20120255705A1 (en) 2012-10-11
EP2516934A4 (en) 2018-04-18
SE534398C2 (en) 2011-08-09
SE0901592A1 (en) 2011-06-22

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