CA2806897A1 - Air supply valve - Google Patents
Air supply valve Download PDFInfo
- Publication number
- CA2806897A1 CA2806897A1 CA2806897A CA2806897A CA2806897A1 CA 2806897 A1 CA2806897 A1 CA 2806897A1 CA 2806897 A CA2806897 A CA 2806897A CA 2806897 A CA2806897 A CA 2806897A CA 2806897 A1 CA2806897 A1 CA 2806897A1
- Authority
- CA
- Canada
- Prior art keywords
- valve flap
- valve
- air supply
- frame
- supply valve
- 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.)
- Abandoned
Links
- 238000007789 sealing Methods 0.000 claims abstract description 20
- 230000008719 thickening Effects 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 10
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 230000002209 hydrophobic effect Effects 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 2
- 229920003023 plastic Polymers 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 12
- 238000009833 condensation Methods 0.000 description 11
- 230000005494 condensation Effects 0.000 description 11
- 230000015572 biosynthetic process Effects 0.000 description 6
- 238000009413 insulation Methods 0.000 description 5
- 238000007664 blowing Methods 0.000 description 3
- 230000008021 deposition Effects 0.000 description 2
- 229920006329 Styropor Polymers 0.000 description 1
- 230000001914 calming effect Effects 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011049 pearl Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Classifications
-
- 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
- F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
- F24F13/10—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers
- F24F13/14—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre
- F24F13/1486—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre characterised by bearings, pivots or hinges
-
- 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
- F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
- F24F13/10—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers
- F24F13/14—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre
- F24F13/1406—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre characterised by sealing means
-
- 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
- F24F2007/0025—Ventilation using vent ports in a wall
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air-Flow Control Members (AREA)
- Lift Valve (AREA)
- Building Environments (AREA)
Abstract
Air supply valve (2) for ventilating closed buildings, with a frame (4) which delimits an air passage opening (6), and with a valve flap (10) which can be swiveled about a horizontal swivel axis (8) between an open and a closed position (12), and which is connected to the frame (4). The valve flap (10) in the closed position (12) abuts with its upper end against the upper transverse profile (14) in a closing manner, and in the open position it unblocks with its upper end a throughflow opening (18). The lateral frame portions comprise sealing faces (20) by means of which the slit between the lateral frame (4) and the side edges of the valve flap (10) is covered in the open position. The interior-side marginal area in the lower portion of the rear wall of the valve flap (10) in the closed position (12) and in an up to 30% open position of the valve flap (10) protrudes by an extent (44) over the surface of the lower transverse profile (16).
Description
Air Supply Valve The present invention relates to an air supply valve for ventilating closed buildings, with a frame which delimits an air passage opening, and with a valve flap which can be swiveled about a horizontal swivel axis between an open and a closed position, and which is connected to the frame, wherein the valve flap in the closed position abuts in a closing manner with its upper end against the upper transverse profile, and in the open position it unblocks with its upper end a throughflow opening, and the lateral frame portions comprise sealing faces by means of which the slit between the lateral frame and the side edges of the valve flap is covered in the open position.
An air supply valve according to the preamble is known, for example, from the document DE 20 2007 004 497 Ul. Such air supply valves are used particularly in order to be able to supply animal stables with sufficient fresh air from the outside.
If the outside temperatures are very cold, the problem arises that the air supply valves freeze and are no longer freely movable. Ice forms particularly in the joint area between the lateral margins of the valve flap and the frame, and on the interior-side rear wall of the valve flap. The formation of ice is connected with the fact that, in the normal case, a slight negative pressure exists within the building, due to the suctioning of the inside air relative to the outside air. As a result of the negative pressure, in spite of sealing of the joints on the air supply valve, a residual quantity of outside air still always flows through the joints into the interior of the housing, since it is impossible to manufacture an air supply valve that is completely pressure-tight. The ice is formed from the condensation water which condenses from the warm stable air when the warm stable air collides with the cold outside air flowing through the air supply valve
An air supply valve according to the preamble is known, for example, from the document DE 20 2007 004 497 Ul. Such air supply valves are used particularly in order to be able to supply animal stables with sufficient fresh air from the outside.
If the outside temperatures are very cold, the problem arises that the air supply valves freeze and are no longer freely movable. Ice forms particularly in the joint area between the lateral margins of the valve flap and the frame, and on the interior-side rear wall of the valve flap. The formation of ice is connected with the fact that, in the normal case, a slight negative pressure exists within the building, due to the suctioning of the inside air relative to the outside air. As a result of the negative pressure, in spite of sealing of the joints on the air supply valve, a residual quantity of outside air still always flows through the joints into the interior of the housing, since it is impossible to manufacture an air supply valve that is completely pressure-tight. The ice is formed from the condensation water which condenses from the warm stable air when the warm stable air collides with the cold outside air flowing through the air supply valve
2 into the building. The formation of ice on the air supply valve cannot be prevented to the desired extent by the metal air guide plates known from the prior art, which are attached to the frame.
The problem of the invention is to reduce the icing tendency of air supply valves at very cold outside temperatures.
The problem is solved by an air supply valve according to the preamble, in which the interior-side marginal area in the lower portion of the rear wall of the valve flap protrudes, in the closed position and in an up to 30% open position of the valve flap, by an extent over the surface of the lower transverse profile.
Due to the laws of physics, the formation of ice on the interior side of the air supply valve in the inflow area of the air supply valve cannot be completely prevented. The joints between the sides of the valve flap and the surrounding frame cannot be configured to be hermetically sealed, so that cold air always penetrates through the joints into the interior of the building. However, it is possible to shift the collision of cold and warm air in the area of the joints, particularly the lower transverse joint, between the valve flap and the frame surrounding said valve flap, at least partially into areas in which the ice formation no longer affects the mobility of the valve flap. In the area of the transverse joint or of the transverse slit along the lower transverse profile, the cold air discharged from the transverse slit into the interior of the building can settle immediately downward owing to its higher specific density, when it enters the interior of the building. As a result, an air stream that is directed downward is produced, which induces the available warm air into the interior of the building as a warm air stream and entrains it downward.
As a result of the extent of protrusion of the valve flap over the abutting face of the lower transverse profile, the blowing induced warm air does not become mixed with the cold air already in the area of the outlet opening of the joint, but only in an area beneath it. The area of
The problem of the invention is to reduce the icing tendency of air supply valves at very cold outside temperatures.
The problem is solved by an air supply valve according to the preamble, in which the interior-side marginal area in the lower portion of the rear wall of the valve flap protrudes, in the closed position and in an up to 30% open position of the valve flap, by an extent over the surface of the lower transverse profile.
Due to the laws of physics, the formation of ice on the interior side of the air supply valve in the inflow area of the air supply valve cannot be completely prevented. The joints between the sides of the valve flap and the surrounding frame cannot be configured to be hermetically sealed, so that cold air always penetrates through the joints into the interior of the building. However, it is possible to shift the collision of cold and warm air in the area of the joints, particularly the lower transverse joint, between the valve flap and the frame surrounding said valve flap, at least partially into areas in which the ice formation no longer affects the mobility of the valve flap. In the area of the transverse joint or of the transverse slit along the lower transverse profile, the cold air discharged from the transverse slit into the interior of the building can settle immediately downward owing to its higher specific density, when it enters the interior of the building. As a result, an air stream that is directed downward is produced, which induces the available warm air into the interior of the building as a warm air stream and entrains it downward.
As a result of the extent of protrusion of the valve flap over the abutting face of the lower transverse profile, the blowing induced warm air does not become mixed with the cold air already in the area of the outlet opening of the joint, but only in an area beneath it. The area of
3 outflow of the cold air from the transverse joint is kept free of warm air and shielded by the protrusion of the valve flap. As a result, ice does not become deposited on the inside wall of the building and on the surface of the frame facing the interior, but only at a site that is clearly lower, or the ice crystals which form from the moisture contained in the warm air drop out of the mutually mixing air streams, without deposition on an inside wall, directly onto the floor.
The protrusion of the valve flap in the closed position and in an up to 30%
open position of the valve flap is sufficient, since the valve flap, based on experience, is not opened to more than 30% of the possible opening width in the case of very cold outside temperatures. The protrusion extent should be selected in such a rummer that the resulting flow of the cold air out of the port opening is as free of turbulence as possible, and the cold air, due to the extent of the protrusion, obtains sufficient space in order to be able to assume the downward flow direction without, in the process, becoming mixed immediately with the blowing warm air.
A protrusion extent that is only very small, for example, only 1 mm or 2 mm, is not sufficient for this purpose.
Advantageously, the resulting protrusion extent should be greater than the width of the port opening.
In this manner, no ice is deposited within the slit, between the bottom side of the valve flap and the abutting face of the lower transverse profile, including the surfaces ¨ abutting directly against the port opening ¨ of the adjacent surfaces of the valve flap and of the lower transverse profile of the frame of the valve flap. To date, ice has been building up in particular in this area as well as at the port site of the slit on the interior side of the air supply valve. Due to the protrusion of the valve flap in this area, the flap no longer freezes as rapidly, in spite of the cold air flowing out of the slit from outside. The condensation of the moisture due to the cold air entering the interior from the transverse slit occurs only beneath the port opening of the slit at a
The protrusion of the valve flap in the closed position and in an up to 30%
open position of the valve flap is sufficient, since the valve flap, based on experience, is not opened to more than 30% of the possible opening width in the case of very cold outside temperatures. The protrusion extent should be selected in such a rummer that the resulting flow of the cold air out of the port opening is as free of turbulence as possible, and the cold air, due to the extent of the protrusion, obtains sufficient space in order to be able to assume the downward flow direction without, in the process, becoming mixed immediately with the blowing warm air.
A protrusion extent that is only very small, for example, only 1 mm or 2 mm, is not sufficient for this purpose.
Advantageously, the resulting protrusion extent should be greater than the width of the port opening.
In this manner, no ice is deposited within the slit, between the bottom side of the valve flap and the abutting face of the lower transverse profile, including the surfaces ¨ abutting directly against the port opening ¨ of the adjacent surfaces of the valve flap and of the lower transverse profile of the frame of the valve flap. To date, ice has been building up in particular in this area as well as at the port site of the slit on the interior side of the air supply valve. Due to the protrusion of the valve flap in this area, the flap no longer freezes as rapidly, in spite of the cold air flowing out of the slit from outside. The condensation of the moisture due to the cold air entering the interior from the transverse slit occurs only beneath the port opening of the slit at a
4 site where the function of the valve flap is no longer interfered with by ice formation. Since the swivel axis of the valve flap is also arranged in the lower half of the valve flap, the valve flap remains freely movable even if the outside air is very cold.
According to an embodiment of the invention, the valve flap comprises, in its lower portion, a thickening relative to the material thickness of the valve flap in its upper portion, as a result of which the slit between the bottom side of the valve flap and the lower transverse profile of the frame is lengthened. Due to the configuration of the lower portion of the valve flap with increased thickness, the valve flap, in this area, has an improved insulation, so that the valve flap in this area for this reason as well has a reduced icing tendency on its room-side rear side. The terms "lower" and "upper" portion are intended to describe the spatial arrangement of the thickening relative to a thinner wall thickness of the valve flap, without any intention to indicate thereby a precise halving of the valve flap over its height. Thus, as needed, the thickening can also extend even into the area of the upper half of the valve flap, or the thickening ends already within the lower half of the valve flap. The material thickness can change from the bottom to the top linearly or nonlinearly. Due to the partial thickening of the valve flap, it is simpler to provide a protrusion extent in the lower room-side area of the rear wall of the valve flap, an area which abuts against the lower transverse profile. Due to the thickening of the valve flap, the flow channel through which the cold air flows along the slit is additionally lengthened. Due to the lengthened flow channel, a calmer laminar flow develops for the cold air which flows through the slit and is then discharged at the port opening with less turbulence from the slit, which has a reduced tendency to become mixed with the warm air already in this area, and which flows off more evenly downward after the discharge from the slit.
According to an embodiment of the invention, the bottom side of the valve flap and the abutting face of the lower transverse profile of the frame have mutually matching circular arc contours extending in the shape of a circular arc. Since a slit, as a joint between the valve flap and the frame profile can form a site of weakness in the insulation of the air supply valve, the slit size between the bottom side of the valve flap and the lower transverse profile can be kept small as a result of the mutually adapted circular arc contour of the frame profile and of the bottom side of the valve flap, particularly if the valve flap has a thickening in its lower portion.
According to an embodiment of the invention, the valve flap is produced from a plastic material comprising closed pores. A foamed polyurethane or styropor is an example of such a materials. These materials, in the case of an appropriate finishing and/or an appropriate supporting structure have sufficient strength, on the one hand, but also in particular very good heat insulation properties. It is also easy to produce spatial molds with uneven surfaces from such materials. Due to the numerous air-tight pores formed in the material, heat is transferred only with difficulty from inside to outside.
According to an embodiment of the invention, the valve flap has a curvature directed toward its upper end in the direction of the building interior. Due to the curvature of the valve flap it is possible for it to protrude in its upper area even further inward into the interior of the building than would be the case if the valve flap had a straight shape. Due to this curved shape, it is possible to allow the cold air flowing into the building interior to flow deeper into the building and thus away from the air supply valve. The moisture contained in the warm air consequently no longer condenses directly in the area of the air supply valve, but further away in the interior of the building. The moisture condensing there can no longer build up as ice on the surfaces of the air supply valve.
As a result of the curvature of the shape of the valve flap, there is in particular also a depth staggering of the cold air flowing through the lateral slit, between the side edges of the valve flap and the lateral frame profiles and the sealing faces, into the interior of the building.
The inwardly curved shape of the valve flap thus also results in a port opening for the inflowing cold air that is correspondingly shifted further inward, the further upward the cold air flows in at the valve flap. Due to the depth staggering, the cold air flowing in over the height of the lateral slit is not added downward; instead the cold air flowing in at a higher location into the interior can sink downward, without coming in direct contact with cold air that flows in at a deeper level, and which, owing to the depth staggering resulting from the curvature, flows in more closely to the frame into the interior. Since the port openings, as a result of the curvature of the valve flap particularly in the upper areas of the valve flap, are spaced farther inward from the frame, the moisture contained in the warm air that is becoming mixed with this cold air can no longer readily separate and become deposited on the interior-side face of the air supply valve, which also reduces the formation of ice.
Due to the inwardly curved shape of the valve flap, the dew and condensation water which has become deposited in the upper half on the valve flap can also drip off more easily directly onto the floor, without running into the lower area of the valve flap, because, in the horizontal direction, there is a spatial offset between the upper and the lower half of the valve flap, and water that is dripping off no longer drips necessarily onto the lower area of the valve flap.
According to an embodiment of the invention, at least one seal is arranged in the interstice between the bottom side of the valve flap and the abutting face of the lower transverse profile of the frame. The seal can be associated, as desired, with the frame profile or the valve flap. As a result of the one or more seals, the heat insulation in the area of the joint is improved.
According to an embodiment of the invention, a drip edge is formed on the rear side and/or the bottom side of the valve flap. Due to the drip edge, condensation water and/or dew water can drip off from the rear side of the valve flap, and it is removed in this manner from the air supply valve. The drip edge extends preferably over the entire width of the valve flap. Due to a drip edge in the upper area of the air supply flap, the condensation and/or dew water cannot reach the lower area of the valve flap in the first place and, in the form of ice, interfere with the function of the air supply valve there. Due to a drip edge on the bottom side of the valve flap, the condensation and/or dew water is kept away from the joint between the bottom side of the valve flap and the frame profile.
According to an embodiment of the invention, the valve flap, in its lateral marginal areas toward the sealing faces of the lateral frame portions, comprises a protrusion which protrudes from the remaining outer surface of the valve flap which is directed outward, and/or from the remaining inner surface of the valve flap which is directed inward, and which extends along the sealing faces. Due to the protrusion, the joint or the slit between the lateral margins of the valve flap and the sealing faces is lengthened. As a result, the same calming effect occurs in the cold air flowing through the slit, as already described above with regard to the lengthening of the slit between the bottom side of the valve flap and the lower transverse profile of the frame. The area in which the cold outside air collides with the warm moisture-loaded air of the room is shifted farther into the interior of the building, in the direction of flow behind the port opening of the slit, so that ice forming in the mixing area does not build up on the inner side of the frame. Since the protrusion is formed only in the lateral marginal areas, the respective cross sections of the air passage opening and the throughflow opening are only slightly reduced, if the latter are arranged on the outer side, so that the air throughput is hardly affected at all by the protrusions.
It is advantageous to provide a protrusion on the lateral margins of the valve flap on the interior side of the air supply valve, because the mixing of the cold air stream with the warm air stream is improved as a result such that less ice forms on the interior side of the air supply valve.
Due to an interior-side protrusion, the flow of the cold air stream out of the slit into the interior of the housing is promoted.
According to an embodiment of the invention, the surface of the valve flap has a hydrophobic coating. Due to the hydrophobic coating, the condensation and/or dew water additionally forms pearls that drip off the surface, and it does not adhere there, so that it too cannot contribute to the icing.
According to an embodiment of the invention, the sealing faces and/or protrusions on the interior side of the valve flap are adjustable in their spatial position. Due to the adjustability, the sealing faces and/or the protrusions, in the case of different swivel positions of the valve flap, can always be set so that the front edges ¨ which are directed toward the interior of the room ¨
of the sealing faces and of the protrusions form a common port edge in the area of the port opening of the slit.
It is explicitly pointed out that the characteristics of the dependent claims in their entirety or in portions can be combined together with the characteristics of the invention according to the main claim in any desired manner, unless compelling technical reasons prevent such a combination.
Further variants and embodiments of the invention can be obtained from the following description of the subject matter and from the drawing.
The invention will now be described in greater detail using an embodiment example.
Figure 1 shows a cross section through an air supply valve, Figure 2 shows an enlarged view of zone II in Figure 1, and Figure 3 shows a cross-sectional view seen from above along line in Figure 1.
In the appended Figure 1, a longitudinal cross section through an air supply valve 2 is shown. The air supply valve 2 consists of a frame 4 which delimits an air passage opening 6. In the frame 4, a valve flap 10 which can swivel about a swivel axis 8 is arranged. In open position of the valve flap 10, which is represented with solid lines, an air stream L
can flow through the throughflow opening 18 between the upper end of the valve flap 10 and the abutment face for the abutment of the valve flap 10 at the upper transverse profile 14. In the closed position 12 shown with broken lines, the throughflow opening 18 through the valve flap 10 is closed.
On the lateral frame portions, sealing faces 20 are arranged, which are shaped in such a way that, in the open position of the valve flap 10 as well, they cover the lateral slit between the side edges of the valve flap 10 and the lateral frame, and close it against the passage of the cold air through this slit. Due to the sealing faces 20, an air stream L can now flow upward through the throughflow opening 18 into the interior of the building, with the exception of small air flows through the slit. The icing tendency in the lateral area of the valve flap 10 is clearly reduced as a result.
The frame 4 has a lower transverse profile 16 which abuts against the bottom side 22 of the valve flap 10. The bottom side 22 of the valve flap 10 is in the shape of a circular arc corresponding to the shape of the abutting faces 24 which are formed in the lower transverse profile 16. The slit between the bottom side 22 of the valve flap 10 and the abutting face 24 of the lower transverse profile 16 is lengthened in this manner.
The slit moreover does not run in a horizontal direction and a straight plane, rather it is curved, in particular curved in the shape of a circular arc, which additionally reduces heat losses through this slit.
In order to prevent air stream flows through the slit, one or more seals 26 can be arranged therein. The seals can also be provided on the remaining sides of the valve flap 10, in order to seal and close or at least reduce in size any air slits between the frame 4 and the valve flap 10.
The dew and condensation water which collects at the upper end on the rear side of the valve flap 10 can first run off downward on the rear side of the valve flap 10. There, at the place where the dew and condensation water hits a drip edge 28, the dew and condensation water drips off the valve flap 10. Since the rear side of the valve flap protrudes over the inwardly facing surface of the frame 4, the dew and condensation water is able to drip off freely downward and it does not continue to adhere to the frame 4. The dripping off effect is promoted additionally by the inwardly extending curvature 30 of the shape of the valve flap 10.
In its lower half, the valve flap 10 has a thickening 32. Due to the thickening 32, the slit between the bottom side 22 of the valve flap 10 and the lower transverse profile 16 is lengthened.
Due to the thickening 32, the material of the valve flap 10 in the lower half can have a lower heat passage coefficient than in the upper half. Due to the improved heat insulation resulting from the thickening 32, the icing tendency in the lower half of the valve flap 10 is reduced on the room-side inner face. Since the swivel axis 8 and the air slit toward the lower transverse profile 16 are located there, the result for the air supply valve 2 in this area is a reduced icing tendency, so that the air supply valve 2 remains free of ice at least on the inner side depending on the temperatures, so that it can be actuated freely even at very low outside temperatures and even after a longer opening time.
In the lateral marginal area of the valve flap 10, a protrusion 34 is formed which projects towards the outside over the remaining surface of the valve flap 10. The protrusion 34 extends along the sealing face 20. The protrusion can be designed with different widths and thickness over the height of the valve flap 10. Alternatively or additionally, it can also be formed so that it protrudes inward over the abutting face of the valve flap.
The area in which the slit 36 opens between the bottom side of the valve flap 10 and the lower transverse profile 16 on the interior side of the air supply valve 2, is represented in an enlargement in Figure 2. In this representation, one can see that the cold air stream 38 is discharged out of the slit 36 in the area of the port opening 42. Owing to the higher specific density of the cold air, the cold air stream 38 sinks downward immediately after the discharge from the slit 36, wherein the radius of curvature of the flow arc depends on the temperature difference between the inside air and the outside air. The colder the outside air is, the tighter the curvature arc. The sinking cold air induces a warm air stream 40 from the warmer, moisture-containing, interior air. As indicated by flow arrows in Figure 2, the cold air stream 38 becomes mixed with the warm air stream 40 beneath the port opening 42. It is only in the mixing area that moisture can then crystallize as ice out of the air and become deposited on the abutting cladding.
However, according to the invention this then occurs only at a distance from the port opening 42 and the movable parts of the air supply valve 2.
The cold air stream 38 flowing out of the slit 36 is shielded upwards from the blowing warm air in the outflow area by the valve flap 10 which protrudes by the extent 44. As a result, the cold air stream 38 becomes mixed with the warm air stream 40 only after the cold air stream 38 has changed its direction of flow to downward, and the cold air has moved downward away from the valve flap 10 and the port opening 36.
In Figure 3, a cross-sectional view along line in Figure 1 is shown. The valve flap is located in the shown representation in a partially opened swivel position.
The valve flap 10 in Figure 3, in contrast to the representation in Figure 1, has a protrusion 34 only on its rear side facing the interior of the building. The cold air stream 38 enters the interior in a straight direction from the longitudinal slit 36 between the lateral sealing face 20 and the protrusion 34. In the interior, it induces warm air streams 40a, 40b which become increasingly mixed with the cold air stream 38, wherein ice crystallizes at an appropriately low temperature of the cold air stream 38.
Due to the protrusion 34, the warm air stream 40b can assume a direction of flow which corresponds approximately to the mirror image of the direction of flow of the warm air stream 40a. As a result, the warm air stream 40a cannot deflect the cold air stream 38 on the rear side of the valve flap 10, where ice would then become deposited; instead the cold air stream 38 maintains, supported by the warm air stream 40b, its direction of flow directed into the interior of the building approximately the same, and it only sinks downward due to the cold, with hardly any change in the direction of flow in the lateral direction. The protrusion 34 formed laterally on the rear wall of the valve flap 10 creates a low flow region in which the warm air stream 40b can become aligned in the direction of flow of the cold air stream 38. In this manner, the protrusion 34 contributes to the reduction of ice deposition on the interior side of the valve flap 10.
It is advantageous if the sealing faces 20 and/or protrusions 34 are configured adjustably in terms of their spatial position on the interior side of the valve flap 10.
In this manner, they can form a smooth port opening 42 of the slit 36 as shown in Figure 3, even in the case of different swivel positions of the valve flap 10, which are indicated by arrows directed in the opposite direction, without any resulting length-wise offset between the front edges of the sealing faces 20 and the protrusion 34.
The embodiment example explained above is used only to explain the invention in reference to an example. It presents no difficulties to the person skilled in the art in adapting the design of the invention to an actual application case in a manner that appears appropriate to him/her by modifying the design.
According to an embodiment of the invention, the valve flap comprises, in its lower portion, a thickening relative to the material thickness of the valve flap in its upper portion, as a result of which the slit between the bottom side of the valve flap and the lower transverse profile of the frame is lengthened. Due to the configuration of the lower portion of the valve flap with increased thickness, the valve flap, in this area, has an improved insulation, so that the valve flap in this area for this reason as well has a reduced icing tendency on its room-side rear side. The terms "lower" and "upper" portion are intended to describe the spatial arrangement of the thickening relative to a thinner wall thickness of the valve flap, without any intention to indicate thereby a precise halving of the valve flap over its height. Thus, as needed, the thickening can also extend even into the area of the upper half of the valve flap, or the thickening ends already within the lower half of the valve flap. The material thickness can change from the bottom to the top linearly or nonlinearly. Due to the partial thickening of the valve flap, it is simpler to provide a protrusion extent in the lower room-side area of the rear wall of the valve flap, an area which abuts against the lower transverse profile. Due to the thickening of the valve flap, the flow channel through which the cold air flows along the slit is additionally lengthened. Due to the lengthened flow channel, a calmer laminar flow develops for the cold air which flows through the slit and is then discharged at the port opening with less turbulence from the slit, which has a reduced tendency to become mixed with the warm air already in this area, and which flows off more evenly downward after the discharge from the slit.
According to an embodiment of the invention, the bottom side of the valve flap and the abutting face of the lower transverse profile of the frame have mutually matching circular arc contours extending in the shape of a circular arc. Since a slit, as a joint between the valve flap and the frame profile can form a site of weakness in the insulation of the air supply valve, the slit size between the bottom side of the valve flap and the lower transverse profile can be kept small as a result of the mutually adapted circular arc contour of the frame profile and of the bottom side of the valve flap, particularly if the valve flap has a thickening in its lower portion.
According to an embodiment of the invention, the valve flap is produced from a plastic material comprising closed pores. A foamed polyurethane or styropor is an example of such a materials. These materials, in the case of an appropriate finishing and/or an appropriate supporting structure have sufficient strength, on the one hand, but also in particular very good heat insulation properties. It is also easy to produce spatial molds with uneven surfaces from such materials. Due to the numerous air-tight pores formed in the material, heat is transferred only with difficulty from inside to outside.
According to an embodiment of the invention, the valve flap has a curvature directed toward its upper end in the direction of the building interior. Due to the curvature of the valve flap it is possible for it to protrude in its upper area even further inward into the interior of the building than would be the case if the valve flap had a straight shape. Due to this curved shape, it is possible to allow the cold air flowing into the building interior to flow deeper into the building and thus away from the air supply valve. The moisture contained in the warm air consequently no longer condenses directly in the area of the air supply valve, but further away in the interior of the building. The moisture condensing there can no longer build up as ice on the surfaces of the air supply valve.
As a result of the curvature of the shape of the valve flap, there is in particular also a depth staggering of the cold air flowing through the lateral slit, between the side edges of the valve flap and the lateral frame profiles and the sealing faces, into the interior of the building.
The inwardly curved shape of the valve flap thus also results in a port opening for the inflowing cold air that is correspondingly shifted further inward, the further upward the cold air flows in at the valve flap. Due to the depth staggering, the cold air flowing in over the height of the lateral slit is not added downward; instead the cold air flowing in at a higher location into the interior can sink downward, without coming in direct contact with cold air that flows in at a deeper level, and which, owing to the depth staggering resulting from the curvature, flows in more closely to the frame into the interior. Since the port openings, as a result of the curvature of the valve flap particularly in the upper areas of the valve flap, are spaced farther inward from the frame, the moisture contained in the warm air that is becoming mixed with this cold air can no longer readily separate and become deposited on the interior-side face of the air supply valve, which also reduces the formation of ice.
Due to the inwardly curved shape of the valve flap, the dew and condensation water which has become deposited in the upper half on the valve flap can also drip off more easily directly onto the floor, without running into the lower area of the valve flap, because, in the horizontal direction, there is a spatial offset between the upper and the lower half of the valve flap, and water that is dripping off no longer drips necessarily onto the lower area of the valve flap.
According to an embodiment of the invention, at least one seal is arranged in the interstice between the bottom side of the valve flap and the abutting face of the lower transverse profile of the frame. The seal can be associated, as desired, with the frame profile or the valve flap. As a result of the one or more seals, the heat insulation in the area of the joint is improved.
According to an embodiment of the invention, a drip edge is formed on the rear side and/or the bottom side of the valve flap. Due to the drip edge, condensation water and/or dew water can drip off from the rear side of the valve flap, and it is removed in this manner from the air supply valve. The drip edge extends preferably over the entire width of the valve flap. Due to a drip edge in the upper area of the air supply flap, the condensation and/or dew water cannot reach the lower area of the valve flap in the first place and, in the form of ice, interfere with the function of the air supply valve there. Due to a drip edge on the bottom side of the valve flap, the condensation and/or dew water is kept away from the joint between the bottom side of the valve flap and the frame profile.
According to an embodiment of the invention, the valve flap, in its lateral marginal areas toward the sealing faces of the lateral frame portions, comprises a protrusion which protrudes from the remaining outer surface of the valve flap which is directed outward, and/or from the remaining inner surface of the valve flap which is directed inward, and which extends along the sealing faces. Due to the protrusion, the joint or the slit between the lateral margins of the valve flap and the sealing faces is lengthened. As a result, the same calming effect occurs in the cold air flowing through the slit, as already described above with regard to the lengthening of the slit between the bottom side of the valve flap and the lower transverse profile of the frame. The area in which the cold outside air collides with the warm moisture-loaded air of the room is shifted farther into the interior of the building, in the direction of flow behind the port opening of the slit, so that ice forming in the mixing area does not build up on the inner side of the frame. Since the protrusion is formed only in the lateral marginal areas, the respective cross sections of the air passage opening and the throughflow opening are only slightly reduced, if the latter are arranged on the outer side, so that the air throughput is hardly affected at all by the protrusions.
It is advantageous to provide a protrusion on the lateral margins of the valve flap on the interior side of the air supply valve, because the mixing of the cold air stream with the warm air stream is improved as a result such that less ice forms on the interior side of the air supply valve.
Due to an interior-side protrusion, the flow of the cold air stream out of the slit into the interior of the housing is promoted.
According to an embodiment of the invention, the surface of the valve flap has a hydrophobic coating. Due to the hydrophobic coating, the condensation and/or dew water additionally forms pearls that drip off the surface, and it does not adhere there, so that it too cannot contribute to the icing.
According to an embodiment of the invention, the sealing faces and/or protrusions on the interior side of the valve flap are adjustable in their spatial position. Due to the adjustability, the sealing faces and/or the protrusions, in the case of different swivel positions of the valve flap, can always be set so that the front edges ¨ which are directed toward the interior of the room ¨
of the sealing faces and of the protrusions form a common port edge in the area of the port opening of the slit.
It is explicitly pointed out that the characteristics of the dependent claims in their entirety or in portions can be combined together with the characteristics of the invention according to the main claim in any desired manner, unless compelling technical reasons prevent such a combination.
Further variants and embodiments of the invention can be obtained from the following description of the subject matter and from the drawing.
The invention will now be described in greater detail using an embodiment example.
Figure 1 shows a cross section through an air supply valve, Figure 2 shows an enlarged view of zone II in Figure 1, and Figure 3 shows a cross-sectional view seen from above along line in Figure 1.
In the appended Figure 1, a longitudinal cross section through an air supply valve 2 is shown. The air supply valve 2 consists of a frame 4 which delimits an air passage opening 6. In the frame 4, a valve flap 10 which can swivel about a swivel axis 8 is arranged. In open position of the valve flap 10, which is represented with solid lines, an air stream L
can flow through the throughflow opening 18 between the upper end of the valve flap 10 and the abutment face for the abutment of the valve flap 10 at the upper transverse profile 14. In the closed position 12 shown with broken lines, the throughflow opening 18 through the valve flap 10 is closed.
On the lateral frame portions, sealing faces 20 are arranged, which are shaped in such a way that, in the open position of the valve flap 10 as well, they cover the lateral slit between the side edges of the valve flap 10 and the lateral frame, and close it against the passage of the cold air through this slit. Due to the sealing faces 20, an air stream L can now flow upward through the throughflow opening 18 into the interior of the building, with the exception of small air flows through the slit. The icing tendency in the lateral area of the valve flap 10 is clearly reduced as a result.
The frame 4 has a lower transverse profile 16 which abuts against the bottom side 22 of the valve flap 10. The bottom side 22 of the valve flap 10 is in the shape of a circular arc corresponding to the shape of the abutting faces 24 which are formed in the lower transverse profile 16. The slit between the bottom side 22 of the valve flap 10 and the abutting face 24 of the lower transverse profile 16 is lengthened in this manner.
The slit moreover does not run in a horizontal direction and a straight plane, rather it is curved, in particular curved in the shape of a circular arc, which additionally reduces heat losses through this slit.
In order to prevent air stream flows through the slit, one or more seals 26 can be arranged therein. The seals can also be provided on the remaining sides of the valve flap 10, in order to seal and close or at least reduce in size any air slits between the frame 4 and the valve flap 10.
The dew and condensation water which collects at the upper end on the rear side of the valve flap 10 can first run off downward on the rear side of the valve flap 10. There, at the place where the dew and condensation water hits a drip edge 28, the dew and condensation water drips off the valve flap 10. Since the rear side of the valve flap protrudes over the inwardly facing surface of the frame 4, the dew and condensation water is able to drip off freely downward and it does not continue to adhere to the frame 4. The dripping off effect is promoted additionally by the inwardly extending curvature 30 of the shape of the valve flap 10.
In its lower half, the valve flap 10 has a thickening 32. Due to the thickening 32, the slit between the bottom side 22 of the valve flap 10 and the lower transverse profile 16 is lengthened.
Due to the thickening 32, the material of the valve flap 10 in the lower half can have a lower heat passage coefficient than in the upper half. Due to the improved heat insulation resulting from the thickening 32, the icing tendency in the lower half of the valve flap 10 is reduced on the room-side inner face. Since the swivel axis 8 and the air slit toward the lower transverse profile 16 are located there, the result for the air supply valve 2 in this area is a reduced icing tendency, so that the air supply valve 2 remains free of ice at least on the inner side depending on the temperatures, so that it can be actuated freely even at very low outside temperatures and even after a longer opening time.
In the lateral marginal area of the valve flap 10, a protrusion 34 is formed which projects towards the outside over the remaining surface of the valve flap 10. The protrusion 34 extends along the sealing face 20. The protrusion can be designed with different widths and thickness over the height of the valve flap 10. Alternatively or additionally, it can also be formed so that it protrudes inward over the abutting face of the valve flap.
The area in which the slit 36 opens between the bottom side of the valve flap 10 and the lower transverse profile 16 on the interior side of the air supply valve 2, is represented in an enlargement in Figure 2. In this representation, one can see that the cold air stream 38 is discharged out of the slit 36 in the area of the port opening 42. Owing to the higher specific density of the cold air, the cold air stream 38 sinks downward immediately after the discharge from the slit 36, wherein the radius of curvature of the flow arc depends on the temperature difference between the inside air and the outside air. The colder the outside air is, the tighter the curvature arc. The sinking cold air induces a warm air stream 40 from the warmer, moisture-containing, interior air. As indicated by flow arrows in Figure 2, the cold air stream 38 becomes mixed with the warm air stream 40 beneath the port opening 42. It is only in the mixing area that moisture can then crystallize as ice out of the air and become deposited on the abutting cladding.
However, according to the invention this then occurs only at a distance from the port opening 42 and the movable parts of the air supply valve 2.
The cold air stream 38 flowing out of the slit 36 is shielded upwards from the blowing warm air in the outflow area by the valve flap 10 which protrudes by the extent 44. As a result, the cold air stream 38 becomes mixed with the warm air stream 40 only after the cold air stream 38 has changed its direction of flow to downward, and the cold air has moved downward away from the valve flap 10 and the port opening 36.
In Figure 3, a cross-sectional view along line in Figure 1 is shown. The valve flap is located in the shown representation in a partially opened swivel position.
The valve flap 10 in Figure 3, in contrast to the representation in Figure 1, has a protrusion 34 only on its rear side facing the interior of the building. The cold air stream 38 enters the interior in a straight direction from the longitudinal slit 36 between the lateral sealing face 20 and the protrusion 34. In the interior, it induces warm air streams 40a, 40b which become increasingly mixed with the cold air stream 38, wherein ice crystallizes at an appropriately low temperature of the cold air stream 38.
Due to the protrusion 34, the warm air stream 40b can assume a direction of flow which corresponds approximately to the mirror image of the direction of flow of the warm air stream 40a. As a result, the warm air stream 40a cannot deflect the cold air stream 38 on the rear side of the valve flap 10, where ice would then become deposited; instead the cold air stream 38 maintains, supported by the warm air stream 40b, its direction of flow directed into the interior of the building approximately the same, and it only sinks downward due to the cold, with hardly any change in the direction of flow in the lateral direction. The protrusion 34 formed laterally on the rear wall of the valve flap 10 creates a low flow region in which the warm air stream 40b can become aligned in the direction of flow of the cold air stream 38. In this manner, the protrusion 34 contributes to the reduction of ice deposition on the interior side of the valve flap 10.
It is advantageous if the sealing faces 20 and/or protrusions 34 are configured adjustably in terms of their spatial position on the interior side of the valve flap 10.
In this manner, they can form a smooth port opening 42 of the slit 36 as shown in Figure 3, even in the case of different swivel positions of the valve flap 10, which are indicated by arrows directed in the opposite direction, without any resulting length-wise offset between the front edges of the sealing faces 20 and the protrusion 34.
The embodiment example explained above is used only to explain the invention in reference to an example. It presents no difficulties to the person skilled in the art in adapting the design of the invention to an actual application case in a manner that appears appropriate to him/her by modifying the design.
Claims (10)
1. Air supply valve (2) for ventilating closed buildings, with a frame (4) which delimits an air passage opening (6), and with a valve flap (10) which can be swiveled about a horizontal swivel axis (8) between an open and a closed position (12), and which is connected to the frame (4), wherein the valve flap (10) in the closed position (12) is applied in a closing manner with its upper end against the upper transverse profile (14), and in the open position it unblocks with its upper end a throughflow opening (18), and the lateral frame portions comprise sealing faces (20) by means of which the slit between the lateral frame (4) and the side edges of the valve flap (10) is covered in the open position, characterized in that the interior-side marginal area in the lower portion of the rear wall of the valve flap (10) in the closed position (12) and in an up to 30%
open position of the valve flap (10) protrudes by an extent (44) over the surface of the lower transverse profile (16).
open position of the valve flap (10) protrudes by an extent (44) over the surface of the lower transverse profile (16).
2. Air supply valve (2) according to Claim 1, characterized in that the valve flap (10) in its lower portion comprises a thickening (32) relative to the material thickness of the valve flap (10) in its upper portion, by means of which the slit between the bottom side (22) of the valve flap (10) and the lower transverse profile (16) of the frame (4) is lengthened.
3. Air supply valve (2) according to Claim 1 or 2, characterized in that the bottom side (22) of the valve flap (10) and the abutting face (24) of the lower transverse profile (16) of the frame (4) comprise mutually matching circular arc contours extending in the shape of a circular arc.
4. Air supply valve (2) according to one of the previous claims, characterized in that the valve flap (10) is produced from a plastic material comprising closed pores.
5. Air supply valve (2) according to one of the previous claims, characterized in that the valve flap (10) has a curvature (30) which is directed toward its upper end in the direction of the building interior.
6. Air supply valve (2) according to one of the previous claims, characterized in that at least one seal (26) is arranged in the interstice between the bottom side (22) of the valve flap (10) and the abutting face (24) of the lower transverse profile (16) of the frame (4).
7. Air supply valve (2) according to one of the previous claims, characterized in that a drip edge (28) is formed on the rear side and/or the bottom side (22) of the valve flap (10).
8. Air supply valve (2) according to one of the previous claims, characterized in that the valve flap (10), in its lateral marginal areas toward the sealing faces (20) of the lateral frame portions, comprises a protrusion (34) which protrudes from the remaining outer surface of the valve flap (10) which is directed outward, and/or from the remaining inner surface (10) of the valve flap which is directed inward, and which extends along the sealing faces (20).
9. Air supply valve (2) according to Claim 8, characterized in that the sealing faces (20) and/or protrusions (34) on the interior side of the valve flap (10) are adjustable in terms of their spatial position.
10. Air supply valve (2) according to one of the previous claims, characterized in that the surface of the valve flap (10) has a hydrophobic coating.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE202012001761U DE202012001761U1 (en) | 2012-02-23 | 2012-02-23 | Air supply |
| DE202012001761.6 | 2012-02-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2806897A1 true CA2806897A1 (en) | 2013-08-23 |
Family
ID=46512648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2806897A Abandoned CA2806897A1 (en) | 2012-02-23 | 2013-02-21 | Air supply valve |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP2631553B1 (en) |
| CA (1) | CA2806897A1 (en) |
| DE (1) | DE202012001761U1 (en) |
| DK (1) | DK2631553T3 (en) |
| EA (1) | EA025805B1 (en) |
| PL (1) | PL2631553T3 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE542351C2 (en) * | 2017-10-20 | 2020-04-14 | Swegon Operations Ab | Flow control arrangement for an air ventilation system |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2194328B (en) * | 1986-06-06 | 1990-05-02 | Hardware & Systems Patents Ltd | Ventilator for door or window frames |
| SU1649217A1 (en) * | 1988-10-03 | 1991-05-15 | Предприятие П/Я А-7306 | Air distributor |
| DE9405211U1 (en) * | 1994-03-28 | 1995-07-27 | Betonbau GmbH, 68753 Waghäusel | Installation element for an opening in the outer wall of a building |
| JPH08254354A (en) * | 1995-03-17 | 1996-10-01 | Sanko Kogyosho:Kk | Opposed blade damper |
| US6533656B2 (en) * | 2000-05-24 | 2003-03-18 | Peter H. Hertel | Air handling system duct closure and heat trap |
| DE20208031U1 (en) * | 2002-05-23 | 2002-08-08 | Schabus, Wolfgang, 83071 Stephanskirchen | Safety remote control system for controlling exhaust air conveyors |
| DE202007004497U1 (en) | 2007-03-23 | 2007-05-31 | Big Dutchman International Gmbh | Supply air valve for ventilation of closed buildings, has upper frame profile, with air circulation wall section, which is facing air intake opening, on withdrawal side of air intake opening |
| DE102008064552A1 (en) * | 2008-12-31 | 2010-07-01 | Jochen Schanze | Ventilation device for air conditioning of room in building, has overflow channel, and air outlets conveyed back flue gas to connection unit in flue gas diverting operation, where part of flue gas stream withdraws from room by channel |
-
2012
- 2012-02-23 DE DE202012001761U patent/DE202012001761U1/en not_active Expired - Lifetime
- 2012-12-28 EA EA201201656A patent/EA025805B1/en not_active IP Right Cessation
-
2013
- 2013-02-05 EP EP13000574.7A patent/EP2631553B1/en active Active
- 2013-02-05 PL PL13000574T patent/PL2631553T3/en unknown
- 2013-02-05 DK DK13000574.7T patent/DK2631553T3/en active
- 2013-02-21 CA CA2806897A patent/CA2806897A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| EA201201656A1 (en) | 2013-09-30 |
| EP2631553A3 (en) | 2016-08-17 |
| DE202012001761U1 (en) | 2012-04-26 |
| EP2631553B1 (en) | 2019-11-27 |
| EP2631553A2 (en) | 2013-08-28 |
| DK2631553T3 (en) | 2020-03-02 |
| EA025805B1 (en) | 2017-01-30 |
| PL2631553T3 (en) | 2020-05-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request |
Effective date: 20170407 |
|
| FZDE | Discontinued |
Effective date: 20190221 |