GB2175999A - Venting control device - Google Patents
Venting control device Download PDFInfo
- Publication number
- GB2175999A GB2175999A GB08514067A GB8514067A GB2175999A GB 2175999 A GB2175999 A GB 2175999A GB 08514067 A GB08514067 A GB 08514067A GB 8514067 A GB8514067 A GB 8514067A GB 2175999 A GB2175999 A GB 2175999A
- Authority
- GB
- United Kingdom
- Prior art keywords
- housing
- flap
- actuator
- open
- chamber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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
- 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
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
-
- 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
- F24F13/1426—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 actuating means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- 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
- F24F13/1426—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 actuating means
- F24F2013/1433—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 actuating means with electric motors
-
- 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
- F24F13/1426—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 actuating means
- F24F2013/146—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 actuating means with springs
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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)
Abstract
A venting control device comprises an open sub-frame (3) interrupted by members (5). A flap (6) is hinged (at 7) to an open mounting flange (9). Another open mounting flange (9) has two side walls (10) and upper and side lips (11). The items above are assembled with an open seal (12) about afresh air inlet (2) in a building wall (1) and the flap (6) is controlled by an actuator (13) biased to open the flap (6) but responsive to a predetermined condition to close the flap (6). <IMAGE>
Description
SPECIFICATION
Venting control device
This invention relates to a venting control device for use with a fresh air inlet provided in a building to minimise wet/dry rot damage to wooden joists and floors.
Because the fresh air inlets have fixed apertures, the air flow through the under floor voids can be considerable and excess to requirements in minimising wet/dry rot damage, resulting in a wasteful heat loss from the ground floor rooms above.
An object of the invention is to minimise this heat loss while, at the same time, minimising wet/ dry rot damage.
According to one aspect of the invention there is provided a venting control device comprising an open sub-frame adapted to be secured to a building wall about a fresh air inlet, a hinged flap disposed to close the sub-frame, and a fairing enclosing the flap in such a manner as to limit the opening of the flap and to provide side walls closing the space between the opened flap and the sub-frame from the sides, the sub-frame having means for mounting an actuator biased to open the flap but responsive to a predetermined condition to close the flap.
According to another aspect of the invention there is provided an actuator comprising a cylindrical housing having a mounting means at one end and being open at both ends, a piston assembly slidable within the housing and comprising a piston rod projecting from the housing at the one end and two spaced apart pistons carried by the piston rod, a one-way restrictor mounted in the housing between the pistons to provide free flow of fluid from a first chamber between a first piston nearer the one end of the housing and the one-way restrictor to a second chamber between a second piston further from the one end of the housing and the one-way restrictor and restricted flow of fluid from the second chamber to the first chamber a shoulder within the housing at the other end of the housing and a compression spring housed within the housing between the shoulder and the second piston.
An embodiment of the invention will now be described, by way of example, with reference to the accompanying drawings, in which:
Figure 1 shows a venting control device mounted on a building wall at a fresh air inlet;
Figure 2 shows a detail of Figure 1;
Figure 3 is an exploded view of the venting control device shown in Figure 1; and
Figure 4 shows a hydrostatic actuator.
Referring to Figures 1, 2 and 3, a brick wall is shown at 1 and a fresh air inlet is shown at 2 in
Figure 1. A venting control device comprises a subframe 3 which is rectangular and open with a horizontal cross-member 4 intermediate the top and bottom members of the sub-frame. Between the cross member 4 and the bottom member of the sub-frame there extends an intermediate vertical member 5. A flap assembly comprises a flap 6 hinged at 7 to a rectangular open mounting flange 8. A fairing comprises a rectangular open mounting flange 9, two sector-shape side walls 10 and upper and side lips 11. A rectangular open rubber seal is shown at 12 and an actuator is shown at 13.
The flange 9 of the fairing is attached to the subframe 3 by means of screws 14 and the actuator is attached to the member 5 by means of screws 15.
The assembly of the sub-frame 3, fairing and actuator 13 are then attached to the wall 1 at the fresh air inlet 2 by means of toggle fastenings 16 passed through openings in the cross member 4 and convenient openings in the fresh air inlet 2 and the assembly is sealed against the wall by the rubber seal 12. The actuator also extends through the fresh air inlet 2 and it may be necessary to widen one of the openings therein to facilitate this.
The flap assembly is then added by mounting the flange 8 to the sub-frame 3 using screws 17 and jamming the hinge curl under the upper lip 11 of the fairing and inserting an enlarged end 18 of a linkage from the actuator 13 into a slot 19 in the flap 6 as shown in Figure 2.
One form of actuator is shown in Figure 4 and comprises a cylindrical housing 20 having a mounting flange 21 at one end and being open at both ends. A piston assembly is slidable within the housing 20 and comprises a piston rod 22 projecting from the flanged end of the housing. The piston rod 22 carries a first piston 23 and a second piston 24 spaced apart therefrom. A one way restrictor is mounted in the housing 20 between the pistons 23, 24 and is in the form of a wall 25 apertured centrally slidably to receive the rod 22, and having a check valve 26 and a restricted orifice 27.
The wall 25 divides the space between the pistons 23, 24 into a first chamber 28 and a second chamber 29, the check valve 26 providing free flow of fluid from the chamber 28 to the chamber 29 and the orifice 27 providing restricted flow of fluid from the chamber 29 to the chamber 28. A shoulder is provided within the housing 20 at the end remote from the flange 21 by means of an internal nut 30 and a compression spring 31 is housed within the housing 20 between the nut 30 and the piston 24.
The actuator in Figure 4 operates by pressure of the wind on the flap 6. When the wind strength is within Force 0 to Force 1 on the Beaufort scale the flap 6 remains open by means of the spring 31.
From Force 1 to Force 2, the flap 6 closes, fluid flowing freely from the chamber 28 to the chamber 29 through the check valve 26 against the force of the spring 31. A sustained wind of Force 2 or above retains the flap 6 fully closed. In a gusty wind when the wind falls below Force 2 the tendency for the flap 6 to open is retarded by the restricted fluid flow from the chamber 29 to the chamber 28 through the orifice 27.
Alternatively, the actuator may be thermally sensitive and operates on air temperature in the underfloor void. When the ambient air temperature within the underfloor void is 17"C or above the flap 6 remains open. At temperatures below 17"C the flap is gradually closed until at a temperature of 13"C or below the flap 6 is fully closed.
Thus during summer conditions the flap 6 will remain open for most of the time whereas in winter conditions the flap 6 will periodically open due to transfer of heat from the heated rooms above to the underfloor void so as to induce air change.
In another alternative, the actuator may be driven by an electric motor linked electrically to a central heating time switch/programmer. When the heating system is switched off the actuator is deenergised so that the flap 6 is opened. Conversely, when the heating system is switched on the actuator is energised so that the flap 6 is closed. Since the actuator is biased to open the flap 6, the flap 6 remains open in the event of an electrical supply failure.
Although the description has been limited to controlling the venting of underfloor voids the invention could be used to control venting of attic spaces.
The operating ranges of wind strength and temperature may be adjusted slightly to suit considerations such as manufacturing tolerances, climate etc.
Claims (4)
1. A venting control device comprising an open sub-frame adapted to be secured to a building wall about a fresh air inlet, a hinged flap disposed to close the sub-frame, and a fairing enclosing the flap in such a manner as to limit the opening of the flap and to provide side walls closing the space between the opened flap and the sub-frame from the sides, the sub-frame having means for mounting an actuator biased to open the flap but responsive to a predetermined condition to close the flap.
2. A device according to claim 1, wherein the open sub-frame comprises members interrupting the opening therein and affording means for securing the subframe to the building wall via the fresh air inlet in the form of a grille and also affording means for mounting the actuator in such a manner that the latter extends through the fresh air inlet.
3. A venting control device substantially as hereinbefore described with reference to Figures 1 to 3 of the accompanying drawings.
4. In combination with the device according to claim 1 or 2 an actuator substantially as hereinbefore described with reference to Figure 4 of the accompanying drawings.
4. An actuator comprising a cylindrical housing having a mounting means at one end and being open at both ends, a piston assembly slidable within the housing and comprising a piston rod projecting from the housing at the one end and two spaced apart pistons carried by the piston rod, a one-way restrictor mounted in the housing between the pistons to provide free flow of fluid from a first chamber between a first piston nearer the one end of the housing and the one-way restrictor to a second chamber between a second piston further from the one end of the housing and the oneway restrictor and restricted flow of fluid from the second chamber to the first chamber a shoulder within the housing at the other end of the housing and a compression spring housed within the housing between the shoulder and the second piston.
5. An actuator substantially as hereinbefore described with reference to Figure 4 of the accompanying drawings.
Amendments to the claims have been filed, and have the following effect: (a) Claims 1, 3, 4 and 5 above have been deleted textually amended.
(b) New or textually amended claims have been filed as follows:
1. A venting control device comprising an open sub-frame adapted to be secured to a building wall about a fresh air inlet, a hinged flap disposed to close the sub-frame, and a fairing enclosing the flap in such a manner as to limit the opening of the flap and to provide side walls closing the space between the opened flap and the subframe from the sides, the subframe comprising members interrupting the opening therein and affording means for securing the sub-frame to the building wall via the fresh air inlet in the form of a grille and also affording means for mounting an actuator in such a manner that the latter extends through the fresh air inlet, which actuator is biased to open the flap but responsive to a predetermined condition to close the flap.
3. In combination with the device according to claim 1 or 2, an actuator comprising a cylindrical housing having a mounting means at one end where the housing is secured to said members and the housing being open at both ends, a piston assembly slidable within the housing and comprising a piston rod projecting from the housing at the one end to a connection with the flap, and two spaced apart pistons carried by the piston rod, a one-way restrictor mounted in the housing between the pistons to provide free flow of fluid from a first chamber between a first piston nearer the one end of the housing and the one-way restrictor to a second chamber between a second piston u from the one end of the housing and the one-way restrictor and restricted flow of fluid from the second chamber to the first chamber a shoulder within the housing at the other end of the housing and a compression spring housed within the housing between the shoulder and the second piston.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8514067A GB2175999B (en) | 1985-06-04 | 1985-06-04 | Venting control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8514067A GB2175999B (en) | 1985-06-04 | 1985-06-04 | Venting control device |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8514067D0 GB8514067D0 (en) | 1985-07-10 |
| GB2175999A true GB2175999A (en) | 1986-12-10 |
| GB2175999B GB2175999B (en) | 1989-07-19 |
Family
ID=10580151
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8514067A Expired GB2175999B (en) | 1985-06-04 | 1985-06-04 | Venting control device |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2175999B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4416871A1 (en) * | 1994-05-13 | 1995-11-16 | Robert Dr Ing Ostwald | Automatic closure with locking of ventilation flap or window |
| EP3637001A4 (en) * | 2017-08-23 | 2020-10-07 | Shanghai Duohuan Oil-Smoke Purification Equipment Co., Ltd. | DOUBLE PURPOSE CIRCULATION CLEANER |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB682726A (en) * | 1950-08-28 | 1952-11-12 | Herbert Frank Fenton | Improvements in or relating to ventilators |
| GB738245A (en) * | 1953-10-21 | 1955-10-12 | William Thomas Scott | Improvements in or relating to ventilation devices |
| GB902738A (en) * | 1960-01-27 | 1962-08-09 | Internat Anemostat Holding Com | Improvements in or relating to air conditioning systems |
| GB963463A (en) * | 1961-11-11 | 1964-07-08 | Ver Baubeschlag Gretsch Co | Improvements in or relating to door-closing devices |
| GB1568957A (en) * | 1976-10-18 | 1980-06-11 | Downing J W A | Ventilating device |
| EP0128048A2 (en) * | 1983-06-07 | 1984-12-12 | Dixon International Limited | Ventilator device |
-
1985
- 1985-06-04 GB GB8514067A patent/GB2175999B/en not_active Expired
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB682726A (en) * | 1950-08-28 | 1952-11-12 | Herbert Frank Fenton | Improvements in or relating to ventilators |
| GB738245A (en) * | 1953-10-21 | 1955-10-12 | William Thomas Scott | Improvements in or relating to ventilation devices |
| GB902738A (en) * | 1960-01-27 | 1962-08-09 | Internat Anemostat Holding Com | Improvements in or relating to air conditioning systems |
| GB963463A (en) * | 1961-11-11 | 1964-07-08 | Ver Baubeschlag Gretsch Co | Improvements in or relating to door-closing devices |
| GB1568957A (en) * | 1976-10-18 | 1980-06-11 | Downing J W A | Ventilating device |
| EP0128048A2 (en) * | 1983-06-07 | 1984-12-12 | Dixon International Limited | Ventilator device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4416871A1 (en) * | 1994-05-13 | 1995-11-16 | Robert Dr Ing Ostwald | Automatic closure with locking of ventilation flap or window |
| EP3637001A4 (en) * | 2017-08-23 | 2020-10-07 | Shanghai Duohuan Oil-Smoke Purification Equipment Co., Ltd. | DOUBLE PURPOSE CIRCULATION CLEANER |
Also Published As
| Publication number | Publication date |
|---|---|
| GB8514067D0 (en) | 1985-07-10 |
| GB2175999B (en) | 1989-07-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19920604 |