Method and device for preparing air to be supplied to a room to a desired temperature and a desired humidity

Abstract

The air to be supplied to a room is brought to a desired temperature and a desired humidity through the following process steps: making outside air flow as a first air stream through a first line ( 20 ) and making a first portion of exhaust air coming from the room flow as a second air stream through a second line ( 21 ), wherein moisture is exchanged between the first air stream and the second air stream by means of a device for exchanging humidity, condensing, by means of a dehumidifying and cooling device ( 19 ), moisture in the form of water from the first air stream and/or from the second air stream and/or inside the device for exchanging humidity, and making a second portion of the exhaust air flow as a third air stream through another line ( 32 ) comprising another dehumidifying and cooling device ( 33 ) and returning said second portion back to the room, wherein in the other dehumidifying and cooling device ( 33 ) moisture is condensed from the third air stream in the form of water.

1 . Method for the preparation of supply air to be supplied to a room to a desired temperature and a desired humidity, comprising the steps:
 making outside air flow as a first air stream through a first line ( 20 ) and making a first portion of exhaust air coming from the room flow as a second air stream through a second line ( 21 ), wherein moisture is exchanged between the first air stream and the second air stream by means of a device for exchanging humidity,   condensing, by means of a dehumidifying and cooling device ( 19 ), moisture in the form of water from the first air stream and/or from the second air stream and/or inside the device for exchanging humidity, and   making a second portion of the exhaust air flow as a third air stream through another line ( 32 ) comprising another dehumidifying and cooling device ( 33 ) and returning said second portion back to the room, wherein in the other dehumidifying and cooling device ( 33 ) moisture is condensed from the third air stream in the form of water.   
     
     
         2 . Method according to  claim 1 , characterized in that the dehumidification and cooling of the air stream flowing through the dehumidifying and cooling device ( 19 ) and/or through the other dehumidifying and cooling device ( 33 ) is accomplished by means of at least one Peltier element ( 39 ). 
     
     
         3 . Method according to  claim 1 , characterized in that the dehumidification and cooling of the air stream flowing through the dehumidifying and cooling device ( 19 ) and/or through the other dehumidifying and cooling device ( 33 ) takes place through the steps:
 condensing the air stream by means of a compressor ( 46 ), whereby the air stream is heated,   passing an outside air stream through a heat exchanger and releasing heat of the condensed air stream to this outside air stream by means of the heat exchanger, and   relaxing the condensed air stream by means of a turbine ( 48 ), whereby the condensed air stream is cooled to a temperature below the dew point so that moisture is separated as water.   
     
     
         4 . Method according to  claim 1 , characterized in that the dehumidification and cooling of the air stream flowing through the dehumidifying and cooling device ( 19 ) and/or through the other dehumidifying and cooling device ( 33 ) takes place in that this air stream is condensed by means of a compressor ( 46 ) and is separated into a warm and a cold air stream by means of a vortex tube ( 53 ), wherein the temperature of the cold air stream lies below the dew point so that moisture is separated as water. 
     
     
         5 . Method according to any of  claims 1  to  4 , characterized in that the exchange of moisture in said device for exchanging humidity takes place by means of at least one air-air humidity exchanger. 
     
     
         6 . Device for the preparation of supply air to be supplied to a room to a desired temperature and a desired humidity, comprising:
 a first line ( 20 ) having an inlet ( 2 ) via which outside air can be drawn in and an outlet ( 3 ) via which supply air can be delivered to the room,   a second line ( 21 ) having an inlet ( 4 ) via which exhaust air can be drawn in from the room and an outlet ( 5 ) via which outgoing air can be released to the surroundings,   a device for exchanging humidity between a first air stream flowing in the first line ( 20 ) and a second air stream flowing in the second line ( 21 ),   a first dehumidifying and cooling device ( 19 ), which is disposed either in the first line ( 20 ) or in the second line ( 21 ) or inside the said device for exchanging humidity,   another line ( 32 ) having an inlet to which exhaust air can be supplied from the room, and an outlet which opens into the room or into the first line ( 20 ) upstream of the outlet ( 3 ) thereof, and   another dehumidifying and cooling device ( 33 ), which is disposed in the other line ( 32 ).   
     
     
         7 . Device according to  claim 6 , characterized by another line ( 26 ) through which outside air can be passed to the dehumidifying and cooling device ( 19 ) and/or to the other dehumidifying and cooling device ( 33 ) and then back to the surroundings, in order to remove heat accumulating in the corresponding dehumidifying and cooling device ( 19 ;  33 ). 
     
     
         8 . Device according to  claim 6  or  7 , characterized in that at least one of the dehumidifying and cooling devices contains a Peltier element ( 39 ) in order to cool the temperature of the air flowing through the dehumidifying and cooling device below the dew point. 
     
     
         9 . Device according to  claim 6  or  7 , characterized in that at least one of the dehumidifying and cooling devices contains a compressor ( 46 ) in order to condense the air and a turbine ( 48 ) in order to relax the condensed air and thereby cool the temperature of the air to a temperature below the dew point. 
     
     
         10 . Device according to  claim 6  or  7 , characterized in that at least one of the dehumidifying and cooling devices contains a compressor ( 46 ) and a vortex tube ( 53 ). 
     
     
         11 . Device according to any of  claims 6  to  10 , characterized in that the device for exchanging humidity comprises at least one air-air humidity exchanger, which has two cavities ( 29 ,  30 ) which are separated by a water-vapor-permeable membrane ( 31 ).