CA1264598A - Ventilation device for ventilation of a room - Google Patents
Ventilation device for ventilation of a roomInfo
- Publication number
- CA1264598A CA1264598A CA000455632A CA455632A CA1264598A CA 1264598 A CA1264598 A CA 1264598A CA 000455632 A CA000455632 A CA 000455632A CA 455632 A CA455632 A CA 455632A CA 1264598 A CA1264598 A CA 1264598A
- Authority
- CA
- Canada
- Prior art keywords
- ventilation
- air
- opening
- room
- outdoor air
- 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
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
- F24F7/00—Ventilation
- F24F7/007—Ventilation with forced flow
- F24F7/013—Ventilation with forced flow using wall or window fans, displacing air through the wall or window
-
- 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
- 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
- F24F2003/1458—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 using regenerators
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Ventilation (AREA)
- Air-Flow Control Members (AREA)
- Central Air Conditioning (AREA)
- Building Environments (AREA)
Abstract
Abstract of the Disclosure A ventilation device for the ventilation of a room, which device is mounted in an opening (3) from the room to outdoor air. The heat recovering part (14) of the device is pivotable away from the opening for outdoor air for direct ventilation of the room with outdoor air through the opening. The device comprises a filter element (5) which is mounted stationary in the opening for outdoor air outside the pivotable heat recovering part.
(Figure 4)
(Figure 4)
Description
~;Z6a~5~13 .
Ventilation device for ventilation of a room The present invention relates to a ventilation device for ventilation of a room, which device is arranyed to be mounted in an opening to the room for outdoor air.
Known ventilation devices usually operate con-tinuously and the direction of air flowing through the device is constant, whereby two devices are, in prin-ciple, needed for each room to be ventilated. One of the devices removes used air from the room and the other brings fresh air into the room. Both devices comprise several air treatment stages such as filtration, heating, humidification, cooling, etc. Arrangements have been developed, in which part of the operations (e.g. heat recovering) is combined and the outblowing and in-blowing devices are built in one unit, but it is stilla question oE two separate devices.
The replacing of air in a room does not require that the device is operating continuously. The device can also oper~te in periods, whereby one device is enough which alternatively removes air from the room and blows outdoor air into the room. Such a device is shown, e.g., in the Finnish patent publication 56,7~2.
The described device has, however, many drawbacks. To begin with the air cannot be filtered because, when the flow direction is changed, the dust gathered in the filter would become lose and return into the room. Be-cause of the lack of a filter, a big distance between the plates must be used in the heat accumulator ln order to prevent clogging, which in order to provide a sufficient heat capacity and. heat conductivity leads to thick and long plates. In order to make the heat conduc-tivity better, it has been proposed to use corrugated or bent plates. Because of the size oE the heat accumu-lator, the device is as a whole big-sized, expensive and ,, ~ZI ;45~8 difficult to place. The use of such a device is limited to cases where the outdoor as well as the indoor air is so clean that there is no need to filter the air or where air filtration is not needed because of other reasons.
The device does not either operate in the way described by the inventor. All heat energy can be recovered only if the indoor air is cooled to exactly the temperature of the outdoor air and correspondingly the outdoor air is heated to exactly the temperature of the indoor air, but this does not occur in practice.
The limitation of the use of filters and the fact that in said publication one has not even tried to solve the question of how air can be efficiently spread into the room and removed therefrom, have resulted in that devices according to the publication are not in use.
Devices are also known which include two heat accumulators, whereby the incoming air flows through one and the exhaust air through the other. Both on the outdoor air side and on the indoor air side a reversing valve is provided ~y which the air flow direction is changed at an interval of about one minute. The outblow-ing and inblowing of air is carried out by two separate fans which both are connected to an air distribution channel system. Therefore, the device is fairly complicat-ed, expensive and exposed to disturbances, and it does not differ from conventional continuously operating systems otherwise than as re~ards the heat accumulator.
The accumulator in itself is also usually solved in the most simple way by using a rotating drum, whereby outdoor air flows in one half of the drum and exhaust air flows in the other half all the time.
The object of this invention is to provide a ventilation device which avoids said drawbacks and is characteri~ed by a simple construction, a small size, an easy positioning, an efficient air distribution into the room and by a high temperature efficiency. This object is achieved with a ventila-tion device according to the invention, which is characterized in that at least a part of the device is made as a ventilation window which is displaceable away from said opening for outdoor air for ventilating the room directly with out-door air through said opening.
The invention is based on the idea that the device is mounted directly in a normal window opening as a ven~ilation window, whereby the device does not require a separate space in the building or e~tra openings in the outer walls or in the roof. The room can despite this be ventilated in an ordinary way direct-ly through the ventilation window when it is desirable to quickly change the air in the room. Also in such a case the outdoor air flows filtered into the room be-cause a filter element remains in place in the window opening when a filter is used in the device.
The invention makes it possible to use the device as a combined outblowing and inblowing device, whereby the device or some part thereof is made pivotable in order to make it easier to service the filter, the heat accumulator, the fan, etc.
If the air distribution channel is arranged to be positioned above ~he window opening and the front wall is formed as a covering board, it is possible to hide ~he ventilation channel to look like a construction normally appearing in an apartment. If the covering board is made easily removable, the whole channel is easy to clean, which essentially improves the hygiene of the device compared to known devices.
When the blowing out of room air and the blowing in of outdoor air occurs through holes in the covering board, the holes can be spread over a large area, where-by also at a low blow-in rate a very good flushing of the room is provided, which essentially decreases the lZ6~L53~
risk for draught and improves the efficiency of ventila-tion compared to known systems. Furthermore, thanks to the positioning and the direction of the holes, the ventilation prevents cold air from flowing down from the window, which causes so-called window draught.
The invention furthermore makes i-t possible to provide air humidification in an easy way in the winter and air cooling in the summer, as is described more exactly below.
The invention is described in more detail in the following with references to the enclosed drawings, wherein Figure 1 is a vertical sectional view of a pre-ferable embodiment of a device according to the inven-tion operating as an exhaust device, Figure 2 is a view similar to Figure 1 when the device operates dS an inblowing device, Figure 3 shows the device when the ventilation element is turned open, Figure 4 is a horizontal sectional view of the device when the ventilation element is turned fully open, and Figure 5 is an inside view of the device.
According to Figure 1 of the drawings a ventila-tion device is mounted in an opening 3 rnade in the wall of a building 2 for a ventilation window for outdoor air for a room 1. The ventilation device comprises a frame 4 fastened to said opening as well as a filter element 5 and a ventilation element 6. The filter element is fastened to the frame to cover the opening except its lower edge and in front of the ~ilter element there is an external grate 6. The ventilation element is mounted on hinges 8 to form a pivotable unit on the masonry frame and in its closed position the element covers the ventilation opening for outdoor air completely.
~;~645~8 Below the filter element, a reversing valve lO
is pivotedly moun-ted in front of the blow-out opening 9.
The ventilation element comprises a heat accumulator 14 consisting of plate cells 11, 12, 13 placed on top of each other, a fan 15 and an air distribution channel 16.
The plates of the undermost cell of the heat accumulator are bent to Eorm blow out nozzles lla directed towards the reversing valve.
The air distribution channel has a front wall 17 provided with interspaced nozzles 18.
Figure 1 shows the device when it operates as an exhaust device. The fan sucks room air A through the nozzles 18 to the airdistribution channel and presses the air through the heat accumulator cells. The air leaving the undermost cell flows through the blow-out nozzles lla towards the reversing valve. The reversing valve is eccentrically mounted or balanced in some other way so that it, when the device is stopped, pivots by itself into the position shown in Figure 2, where it closes the blow-out opening 9. The air jets flowing at great speed from the nozzles lla meet the reversing valve in a position according to Figure 2 and push it out of their way into the position shown in Figure 1. Because of this, the reversing valve opens the blow-out opening 9 and closes a flow slot 19 leading to the filter. When air is blown Erom the blow-out opening 9 at great speed, the exhaust air does not adher to the outer wall of the building, whèreby collection of dirt on the outer wall, humidity damages etc, as well as so-called short cir-cuits, that is, exhaust air flowing directly back intothe grate 7 are prevented. Figure 2 shows the device when it operates as a inblowing device. The fan now rotates in the opposite direction and sucks outdoor air B through the grate and the filter and further through the flow slot 19 into the heat accumulator. Therefrom the Ean presses the outdoor 6 ~,2~s~8 air into the air distribution channel and further through the nozzles 18 into the room. secause there is an underpressure in the device compared to the outdoor air pressure, which underpressure is as big as the pressure loss caused by the external grate and the filter when air Elows therethrough, the reversing valve tightens well against its frame and closes tightly the blow-out opening 9. This ensures that unfiltered air does not get into the device.
1Q The blow-out opening 9 is formed so that the out-flow rate of air is so high that the pressure loss when blowing out alr is about as big as the pressure loss caused by the filter and grate when blowing in air. In such a way the blow-out and blow-in air volumes will be equally big, if desired. It is also possible to change the blow-out rate and the pressure loss developed there-by, whereby also the proportion of the blow-out and blow-in volume flows will be the desired.
According to Figures 3 and 4 the heat accumulator 14 can be pivoted away from a position closing the opening for outdoor air to the side of the opening, so that it is possible to ventilate the room through the opening in a normal way. Also in that case -the outdoor air flows filtered into the room, because the filter remains in place in the opening. When the accumulator is pivoted to open position, it is easy to clean and service the parts of the device.
According to Figures 1 and 5 the air distribution channel 16 is positioned above the window 20 and its front wall 17 is formed as a covering board. A curtain rod 21 is attached to the bottom wall of the channel.
The covering board i5 made removable, Eor example, by means of catches or other fastening elements, so that the whole channel can be easily cleaned. Through the nozzles 18 of the covering board air is distributed over a big area into the room at a low blow-in rate.
~Zt~45~
An air distribution channel formed in this way has the advantage that it increases the heat recovering efficiency because the entire channel and the covering board forming a large surEace operate as heat recovering elements.
By dividing the heat accumulator into at least two or several parts 11, 12 and 13, a heat flow inside the plates pf the heatexchanger can be prevented. In this way a better heat recovering rate can be obtained or, when trying to obtain a given heat recovering rate, the length of the plates in the flow direction of the air can be made shorter. Hence a smaller and cheaper device than the known constructions is obtained. If the device according to the invention furthermore is provided with a filter, the space between the plates can be made small-er without any risk of clogging. Thus a heat efficiency of more than 80 % can be obtainedwith a heat accumulator, with a length of about 500 mm, which enables the device to be mounted instead of a ventilation window. The hand-ling, service and cleaning of short accumulators made ofthin plates is easy.
The invention furthermore comprises a simple manner to provide humidification in the winter and cooling in the summer. If a simple humidification nozzle 22 is positioned in the air distribution channel 9 or in the space between the fan 15 and the heat reCQvering cell 13, humidification is provided in the winter by opening a valve in a pipe connected to the humidification nozzle when the blow-in cycle begins, whereby the nozzle starts to atomize water which partly evaporates into the air, partly flows into the heat recovering cells 13 and 12.
The valve is held open for so long that the wa-ter quanti-ty which is needed for increasing the humidity of the air to a desired level can be fed into the cells 13 and 12.
Even when the valve has been closed, water evaporates into the air from the wet surfaces of the cells and 8 ~;269LS~8 further humidifies -the air. Because the gaps between the plates of the cells are small and the surface area of the platesis big, the humidification is very efficient.
I'hus the heat recovering cells operate simultaneously as humidification cells, and separate humidification cells or chambers used in conventional devices are not required.
The heat recovering cells 11, 12 and 13 also operate as humidity recovering devices. This is based on the fact that when humid indoor air is cooled when flowing through the cells during the exhaust state, the aqueous vapor contained in the air condenses to water mainly on the surEaces of the recovering cells 11 and 12. During the blow-in stage the water evaporates back into the dry blow-in air.
The need for additional humidification in devices of this type is fairly small and for such a small humidi-fication the evaporation capacity vf the surfaces of the device is sufficient, and the small water quantities do not cause corrosion, clogging and the like problems, as in known devices. Naturally also other humidification manners, e.g. vapour humidiEication, can be used.
When the need for humidification is small, the variation in air humidity caused by the periodical humidification achieved by the invention remains so small that this variation does not cause any practical disadvantage. The decrease of the blow-in air tempera-ture caused by the humidification also remains so small that it is not even necessary to heat the air. When the variations in temperature and humidity are small and the operation cycle of the device is short, an on-off adjustment can be used instead of a relative adjustment and, for example, the time can be regulated instead of regulating the temperature and humidity, it is possible to regulate the time during which humidification, heating etc. is carried out, without any considerable variation .~.Zf~,4~iiC~&~
in the humidity or temperature of the space -to be air-conditioned. The adjustrnent can be carried out either in such a way that humidification,heating etc. is carried out during a certain part of the operation cycle or in such a way that the desired air treatment is carried out during the whole operation cycle but only during some operation cycles or by combining both adjustment possibi-lities. Compared to relative adjustment the device become essentially more simple and the price of the whole adjustment system is only a part of that of a convention-al system. The operating reliability oE the device also improves essentially.
The drawings and the description relating thereto are intended only to illustrate the idea of the invention.
As to its details the device according to the invention may vary within the scope of the claims. The reversing valve can be provided with some kind of power means which pivots it into different positions depending on the operation of the device. The reversing valve can also be mounted to be displaced together with the pivotable ventilation element. Instead of a pivotable construction, it is possible to make the displaceable part of the device movable away from the opening for outdoor air in ano-ther way, e.g. along -tracks. Instead of the accumulator or in addition to the accumulator, it is possible to make some other part of the devlce displaceable.
Ventilation device for ventilation of a room The present invention relates to a ventilation device for ventilation of a room, which device is arranyed to be mounted in an opening to the room for outdoor air.
Known ventilation devices usually operate con-tinuously and the direction of air flowing through the device is constant, whereby two devices are, in prin-ciple, needed for each room to be ventilated. One of the devices removes used air from the room and the other brings fresh air into the room. Both devices comprise several air treatment stages such as filtration, heating, humidification, cooling, etc. Arrangements have been developed, in which part of the operations (e.g. heat recovering) is combined and the outblowing and in-blowing devices are built in one unit, but it is stilla question oE two separate devices.
The replacing of air in a room does not require that the device is operating continuously. The device can also oper~te in periods, whereby one device is enough which alternatively removes air from the room and blows outdoor air into the room. Such a device is shown, e.g., in the Finnish patent publication 56,7~2.
The described device has, however, many drawbacks. To begin with the air cannot be filtered because, when the flow direction is changed, the dust gathered in the filter would become lose and return into the room. Be-cause of the lack of a filter, a big distance between the plates must be used in the heat accumulator ln order to prevent clogging, which in order to provide a sufficient heat capacity and. heat conductivity leads to thick and long plates. In order to make the heat conduc-tivity better, it has been proposed to use corrugated or bent plates. Because of the size oE the heat accumu-lator, the device is as a whole big-sized, expensive and ,, ~ZI ;45~8 difficult to place. The use of such a device is limited to cases where the outdoor as well as the indoor air is so clean that there is no need to filter the air or where air filtration is not needed because of other reasons.
The device does not either operate in the way described by the inventor. All heat energy can be recovered only if the indoor air is cooled to exactly the temperature of the outdoor air and correspondingly the outdoor air is heated to exactly the temperature of the indoor air, but this does not occur in practice.
The limitation of the use of filters and the fact that in said publication one has not even tried to solve the question of how air can be efficiently spread into the room and removed therefrom, have resulted in that devices according to the publication are not in use.
Devices are also known which include two heat accumulators, whereby the incoming air flows through one and the exhaust air through the other. Both on the outdoor air side and on the indoor air side a reversing valve is provided ~y which the air flow direction is changed at an interval of about one minute. The outblow-ing and inblowing of air is carried out by two separate fans which both are connected to an air distribution channel system. Therefore, the device is fairly complicat-ed, expensive and exposed to disturbances, and it does not differ from conventional continuously operating systems otherwise than as re~ards the heat accumulator.
The accumulator in itself is also usually solved in the most simple way by using a rotating drum, whereby outdoor air flows in one half of the drum and exhaust air flows in the other half all the time.
The object of this invention is to provide a ventilation device which avoids said drawbacks and is characteri~ed by a simple construction, a small size, an easy positioning, an efficient air distribution into the room and by a high temperature efficiency. This object is achieved with a ventila-tion device according to the invention, which is characterized in that at least a part of the device is made as a ventilation window which is displaceable away from said opening for outdoor air for ventilating the room directly with out-door air through said opening.
The invention is based on the idea that the device is mounted directly in a normal window opening as a ven~ilation window, whereby the device does not require a separate space in the building or e~tra openings in the outer walls or in the roof. The room can despite this be ventilated in an ordinary way direct-ly through the ventilation window when it is desirable to quickly change the air in the room. Also in such a case the outdoor air flows filtered into the room be-cause a filter element remains in place in the window opening when a filter is used in the device.
The invention makes it possible to use the device as a combined outblowing and inblowing device, whereby the device or some part thereof is made pivotable in order to make it easier to service the filter, the heat accumulator, the fan, etc.
If the air distribution channel is arranged to be positioned above ~he window opening and the front wall is formed as a covering board, it is possible to hide ~he ventilation channel to look like a construction normally appearing in an apartment. If the covering board is made easily removable, the whole channel is easy to clean, which essentially improves the hygiene of the device compared to known devices.
When the blowing out of room air and the blowing in of outdoor air occurs through holes in the covering board, the holes can be spread over a large area, where-by also at a low blow-in rate a very good flushing of the room is provided, which essentially decreases the lZ6~L53~
risk for draught and improves the efficiency of ventila-tion compared to known systems. Furthermore, thanks to the positioning and the direction of the holes, the ventilation prevents cold air from flowing down from the window, which causes so-called window draught.
The invention furthermore makes i-t possible to provide air humidification in an easy way in the winter and air cooling in the summer, as is described more exactly below.
The invention is described in more detail in the following with references to the enclosed drawings, wherein Figure 1 is a vertical sectional view of a pre-ferable embodiment of a device according to the inven-tion operating as an exhaust device, Figure 2 is a view similar to Figure 1 when the device operates dS an inblowing device, Figure 3 shows the device when the ventilation element is turned open, Figure 4 is a horizontal sectional view of the device when the ventilation element is turned fully open, and Figure 5 is an inside view of the device.
According to Figure 1 of the drawings a ventila-tion device is mounted in an opening 3 rnade in the wall of a building 2 for a ventilation window for outdoor air for a room 1. The ventilation device comprises a frame 4 fastened to said opening as well as a filter element 5 and a ventilation element 6. The filter element is fastened to the frame to cover the opening except its lower edge and in front of the ~ilter element there is an external grate 6. The ventilation element is mounted on hinges 8 to form a pivotable unit on the masonry frame and in its closed position the element covers the ventilation opening for outdoor air completely.
~;~645~8 Below the filter element, a reversing valve lO
is pivotedly moun-ted in front of the blow-out opening 9.
The ventilation element comprises a heat accumulator 14 consisting of plate cells 11, 12, 13 placed on top of each other, a fan 15 and an air distribution channel 16.
The plates of the undermost cell of the heat accumulator are bent to Eorm blow out nozzles lla directed towards the reversing valve.
The air distribution channel has a front wall 17 provided with interspaced nozzles 18.
Figure 1 shows the device when it operates as an exhaust device. The fan sucks room air A through the nozzles 18 to the airdistribution channel and presses the air through the heat accumulator cells. The air leaving the undermost cell flows through the blow-out nozzles lla towards the reversing valve. The reversing valve is eccentrically mounted or balanced in some other way so that it, when the device is stopped, pivots by itself into the position shown in Figure 2, where it closes the blow-out opening 9. The air jets flowing at great speed from the nozzles lla meet the reversing valve in a position according to Figure 2 and push it out of their way into the position shown in Figure 1. Because of this, the reversing valve opens the blow-out opening 9 and closes a flow slot 19 leading to the filter. When air is blown Erom the blow-out opening 9 at great speed, the exhaust air does not adher to the outer wall of the building, whèreby collection of dirt on the outer wall, humidity damages etc, as well as so-called short cir-cuits, that is, exhaust air flowing directly back intothe grate 7 are prevented. Figure 2 shows the device when it operates as a inblowing device. The fan now rotates in the opposite direction and sucks outdoor air B through the grate and the filter and further through the flow slot 19 into the heat accumulator. Therefrom the Ean presses the outdoor 6 ~,2~s~8 air into the air distribution channel and further through the nozzles 18 into the room. secause there is an underpressure in the device compared to the outdoor air pressure, which underpressure is as big as the pressure loss caused by the external grate and the filter when air Elows therethrough, the reversing valve tightens well against its frame and closes tightly the blow-out opening 9. This ensures that unfiltered air does not get into the device.
1Q The blow-out opening 9 is formed so that the out-flow rate of air is so high that the pressure loss when blowing out alr is about as big as the pressure loss caused by the filter and grate when blowing in air. In such a way the blow-out and blow-in air volumes will be equally big, if desired. It is also possible to change the blow-out rate and the pressure loss developed there-by, whereby also the proportion of the blow-out and blow-in volume flows will be the desired.
According to Figures 3 and 4 the heat accumulator 14 can be pivoted away from a position closing the opening for outdoor air to the side of the opening, so that it is possible to ventilate the room through the opening in a normal way. Also in that case -the outdoor air flows filtered into the room, because the filter remains in place in the opening. When the accumulator is pivoted to open position, it is easy to clean and service the parts of the device.
According to Figures 1 and 5 the air distribution channel 16 is positioned above the window 20 and its front wall 17 is formed as a covering board. A curtain rod 21 is attached to the bottom wall of the channel.
The covering board i5 made removable, Eor example, by means of catches or other fastening elements, so that the whole channel can be easily cleaned. Through the nozzles 18 of the covering board air is distributed over a big area into the room at a low blow-in rate.
~Zt~45~
An air distribution channel formed in this way has the advantage that it increases the heat recovering efficiency because the entire channel and the covering board forming a large surEace operate as heat recovering elements.
By dividing the heat accumulator into at least two or several parts 11, 12 and 13, a heat flow inside the plates pf the heatexchanger can be prevented. In this way a better heat recovering rate can be obtained or, when trying to obtain a given heat recovering rate, the length of the plates in the flow direction of the air can be made shorter. Hence a smaller and cheaper device than the known constructions is obtained. If the device according to the invention furthermore is provided with a filter, the space between the plates can be made small-er without any risk of clogging. Thus a heat efficiency of more than 80 % can be obtainedwith a heat accumulator, with a length of about 500 mm, which enables the device to be mounted instead of a ventilation window. The hand-ling, service and cleaning of short accumulators made ofthin plates is easy.
The invention furthermore comprises a simple manner to provide humidification in the winter and cooling in the summer. If a simple humidification nozzle 22 is positioned in the air distribution channel 9 or in the space between the fan 15 and the heat reCQvering cell 13, humidification is provided in the winter by opening a valve in a pipe connected to the humidification nozzle when the blow-in cycle begins, whereby the nozzle starts to atomize water which partly evaporates into the air, partly flows into the heat recovering cells 13 and 12.
The valve is held open for so long that the wa-ter quanti-ty which is needed for increasing the humidity of the air to a desired level can be fed into the cells 13 and 12.
Even when the valve has been closed, water evaporates into the air from the wet surfaces of the cells and 8 ~;269LS~8 further humidifies -the air. Because the gaps between the plates of the cells are small and the surface area of the platesis big, the humidification is very efficient.
I'hus the heat recovering cells operate simultaneously as humidification cells, and separate humidification cells or chambers used in conventional devices are not required.
The heat recovering cells 11, 12 and 13 also operate as humidity recovering devices. This is based on the fact that when humid indoor air is cooled when flowing through the cells during the exhaust state, the aqueous vapor contained in the air condenses to water mainly on the surEaces of the recovering cells 11 and 12. During the blow-in stage the water evaporates back into the dry blow-in air.
The need for additional humidification in devices of this type is fairly small and for such a small humidi-fication the evaporation capacity vf the surfaces of the device is sufficient, and the small water quantities do not cause corrosion, clogging and the like problems, as in known devices. Naturally also other humidification manners, e.g. vapour humidiEication, can be used.
When the need for humidification is small, the variation in air humidity caused by the periodical humidification achieved by the invention remains so small that this variation does not cause any practical disadvantage. The decrease of the blow-in air tempera-ture caused by the humidification also remains so small that it is not even necessary to heat the air. When the variations in temperature and humidity are small and the operation cycle of the device is short, an on-off adjustment can be used instead of a relative adjustment and, for example, the time can be regulated instead of regulating the temperature and humidity, it is possible to regulate the time during which humidification, heating etc. is carried out, without any considerable variation .~.Zf~,4~iiC~&~
in the humidity or temperature of the space -to be air-conditioned. The adjustrnent can be carried out either in such a way that humidification,heating etc. is carried out during a certain part of the operation cycle or in such a way that the desired air treatment is carried out during the whole operation cycle but only during some operation cycles or by combining both adjustment possibi-lities. Compared to relative adjustment the device become essentially more simple and the price of the whole adjustment system is only a part of that of a convention-al system. The operating reliability oE the device also improves essentially.
The drawings and the description relating thereto are intended only to illustrate the idea of the invention.
As to its details the device according to the invention may vary within the scope of the claims. The reversing valve can be provided with some kind of power means which pivots it into different positions depending on the operation of the device. The reversing valve can also be mounted to be displaced together with the pivotable ventilation element. Instead of a pivotable construction, it is possible to make the displaceable part of the device movable away from the opening for outdoor air in ano-ther way, e.g. along -tracks. Instead of the accumulator or in addition to the accumulator, it is possible to make some other part of the devlce displaceable.
Claims (6)
1. A ventilation device for ventilation of a room which device is adapted for mounting in an opening from the room to outdoor air, said ventilation device including a ventilation element having a heat recovery device, said ventilation element being movably mounted for movement away from said opening for ventilating the room directly with outdoor air through said opening, a filter element stationary mounted in said opening and means for selectively producing a first air flow from the room to outdoor air and a second air flow from outdoor air to the room including a reversing valve for directing said first air flow through said ventilation element and bypassing said filter element and directing said second air flow selectively through both said filter element and said ventilation or through said filter element and bypassing said ventilation element upon movement of said ventilation element away from said opening.
2. Ventilation device of claim 1 wherein said reversing valve is pivotable between first and second positions for directing said first and second air flow, respectively.
3. Ventilation device according to claim 1, which comprises a filter element and ventilation element provided with a heat recovering device, characterized in that the heat recovering device is pivotable with respect to the filter element mounted stationary in the opening for outdoor air.
4. Ventilation device according to claim 1, characterized in that the reversing valve is mounted to pivot between said exhaust position and said blow in position due to the influence of the air flow through and the pressure difference over the ventilation element.
5. Ventilation device according to claim 4, in which the ventilation element is provided with a plate type heat recovering device, characterized in that the plates of the heat recovering device are formed into blow-out nozzles eccentrically directed towards the reversing valve with respect to the pivot axis of the valve.
6. Ventilation device according to claim 3, in which the ventilation element is provided with a plate type heat recovering device, characterized in that the plates of the heat recovering device are divided into at least tow cells in the air flow direction and that the cells are mounted on top of each other to form a pivotable lid covering the opening for outdoor air, said lid terminating at one end in the filter element and at the other end in an air distribution channel.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI832003 | 1983-06-03 | ||
| FI832003A FI71000C (en) | 1983-06-03 | 1983-06-03 | VENTILATIONSAPPARAT FOER VENTILERING AV ETT RUMSUTRYMME |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1264598A true CA1264598A (en) | 1990-01-23 |
Family
ID=8517307
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000455632A Expired CA1264598A (en) | 1983-06-03 | 1984-06-01 | Ventilation device for ventilation of a room |
Country Status (8)
| Country | Link |
|---|---|
| CA (1) | CA1264598A (en) |
| DE (1) | DE3420295A1 (en) |
| DK (1) | DK159942C (en) |
| FI (1) | FI71000C (en) |
| FR (1) | FR2547023B1 (en) |
| GB (1) | GB2141819B (en) |
| NO (1) | NO158314C (en) |
| SE (1) | SE8402931L (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE9601055D0 (en) * | 1996-03-20 | 1996-03-20 | Erling C Normann | Fan with heat exchanger |
Family Cites Families (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB280738A (en) * | 1927-01-14 | 1927-11-24 | Khursedji Sorabji Jassawalla | Improved ventilator |
| FR715720A (en) * | 1930-05-28 | 1931-12-08 | Method and apparatus for ventilating all enclosed spaces, in particular cold rooms | |
| US1994515A (en) * | 1932-10-28 | 1935-03-19 | Linde Air Prod Co | Air conditioning system |
| GB496416A (en) * | 1937-07-14 | 1938-11-30 | Winsor Axia Fans Ltd | Improvements relating to ventilating systems |
| GB513723A (en) * | 1938-11-05 | 1939-10-19 | Koller Ernst | Improvements in and relating to windows |
| GB665648A (en) * | 1949-04-01 | 1952-01-30 | King Ltd Geo W | Improvements in or relating to window constructions |
| BE503202A (en) * | 1950-05-11 | |||
| GB882862A (en) * | 1959-10-09 | 1961-11-22 | Poul Burup | Improvements in ventilators for space ventilation |
| US3363531A (en) * | 1966-10-14 | 1968-01-16 | Lohmann Appbau K G | Ventilating arrangement for the rooms of a building, especially of a stall, pigsty, fwl-house or the like |
| US3530782A (en) * | 1968-09-17 | 1970-09-29 | Auer Register Co | Register assembly |
| US3570387A (en) * | 1969-03-28 | 1971-03-16 | James W Eggers | Air vents |
| FR2224633A1 (en) * | 1973-04-06 | 1974-10-31 | Calmettes Claude | Air heating unit for windows or doors - has heating elements behind louvres along vert. edge of frame |
| NO137706L (en) * | 1974-01-21 | |||
| DE2813008A1 (en) * | 1978-03-23 | 1979-09-27 | Karl Dipl Ing Assmann | Window surround ventilation unit - has inlet and outlet air flow chambers forming heat and humidity exchange system |
| CA1120770A (en) * | 1978-09-18 | 1982-03-30 | Stanley I. Martin | Ventilator |
| GB2094393B (en) * | 1981-03-06 | 1985-02-20 | Pernas Charter Management Sdn | Flexible coupling between inner and outer concentric member |
| EP0106259A3 (en) * | 1982-10-07 | 1985-03-13 | Heinrich Drexl Kommanditgesellschaft | Waste heat recovery installation for a building |
-
1983
- 1983-06-03 FI FI832003A patent/FI71000C/en not_active IP Right Cessation
-
1984
- 1984-05-21 GB GB8412963A patent/GB2141819B/en not_active Expired
- 1984-05-28 NO NO842110A patent/NO158314C/en not_active IP Right Cessation
- 1984-05-30 DE DE19843420295 patent/DE3420295A1/en not_active Withdrawn
- 1984-05-30 SE SE8402931A patent/SE8402931L/en unknown
- 1984-06-01 FR FR8408685A patent/FR2547023B1/en not_active Expired
- 1984-06-01 CA CA000455632A patent/CA1264598A/en not_active Expired
- 1984-06-01 DK DK272284A patent/DK159942C/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| FR2547023A1 (en) | 1984-12-07 |
| NO158314B (en) | 1988-05-09 |
| FR2547023B1 (en) | 1988-02-19 |
| SE8402931D0 (en) | 1984-05-30 |
| DK159942C (en) | 1991-05-21 |
| FI832003A0 (en) | 1983-06-03 |
| GB2141819A (en) | 1985-01-03 |
| DK272284D0 (en) | 1984-06-01 |
| GB8412963D0 (en) | 1984-06-27 |
| DE3420295A1 (en) | 1984-12-06 |
| GB2141819B (en) | 1987-02-18 |
| SE8402931L (en) | 1984-12-04 |
| NO842110L (en) | 1984-12-04 |
| FI71000B (en) | 1986-07-18 |
| FI71000C (en) | 1986-10-27 |
| FI832003L (en) | 1984-12-04 |
| DK159942B (en) | 1990-12-31 |
| NO158314C (en) | 1988-08-17 |
| DK272284A (en) | 1984-12-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |