GB2358701A - Air or gas deflection blade - Google Patents
Air or gas deflection blade Download PDFInfo
- Publication number
- GB2358701A GB2358701A GB0029069A GB0029069A GB2358701A GB 2358701 A GB2358701 A GB 2358701A GB 0029069 A GB0029069 A GB 0029069A GB 0029069 A GB0029069 A GB 0029069A GB 2358701 A GB2358701 A GB 2358701A
- Authority
- GB
- United Kingdom
- Prior art keywords
- blade member
- track
- region
- deflection
- resilient
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
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
- 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
- F24F13/15—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre with parallel simultaneously tiltable lamellae
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 deflection blade member (20) for use in deflecting an air or gas flow in a circulation system comprises a deflection region (20<U>a</U>) for deflecting the air or gas flow. The blade member (20) is angularly movable relative to a track (24) forming part of the circulation system to adjust the deflection characteristics of the system, and includes a resilient region (30;) at least a part of which co-operates with a track (24) to retain the blade member (20) in a substantially fixed angular position relative to the track (24), in use, when the desired angular position has been attained.
Description
2358701 DEFLECTTON BLADE The invention relates to a deflection blade
suitable for use in deflecting an air or gas flow in a circulation system. In particular, the invention relates to an air deflection blade of the type suitable for use in a ventilation system or an air conditioning system.
Conventional ventilation or air conditioning systems typically comprise a plurality of air deflection blades which are arranged at an angle to the air flow through the system so as to deflect the flow of air in a selected direction. With reference to Figure 1, a conventional blade 10 is formed from aluminium and includes a planar region 10a and a region of substantially circular cross-section 10b. In use, the section 10b of the blade member is received within a tubular member, commonly referred to as a track or runner 12, which forms part of a base plate 14. The track 12 has an inner surface of substantially circular cross section, the blade member 10 and the inner surface of the track 12 being shaped such that the blade member forms an interference fit with the track 12.
The blade 10 is angularly moveable widiin the track 12 between a range of positions so that the angle,, between the region 10a of the blade 10 and the base plate 14 can be ad usted. By adjusting the angular position of the region i 10a, the air deflection characteristics of the system can be varied. The interference fit between the region 10b of the blade member 10 and the track 12 ensures the blade 10 adopts a substantially fixed position, in use, when it has been adjusted to the desired angular position.
Typically, the base plate 14 may include a plurality of tracks 12 arranged in parallel, one or more blades 10 being received within each of the tracks 12 so as to form an array of air deflection blades. Usually, the array of blades 10 is assembled at the installation site for the ventilation system. In order to assemble the array, each blade is inserted into an open end of a respective track 12 and is pushed through the length of the track 12 until it is fully inserted therein. Usually, the tracks 12 are of longer length than the blades 10 such that several blades 10 are inserted into a single track 12.
A problem with the conventional system is that it is difficult to manufacture the blades 10 and the tracks 12 with sufficient accuracy to ensure that the blades form an interference fit with the respective track 12 along the entire length of the track 12. Furthermore, any inaccuracies in the dimensions of the track 12 and the blades 10 can make it difficult to push the blades 10 along the length of the track 12 during assembly. This can lead to damage being caused to either the blades or to the track.
It is an object of the present invention to overcome these problems.
According to the present invention, there is provided a deflection blade member for use in deflecting an air or gas flow in a circulation system, the blade member being angularly movable relative to a track forming part of the circulation system to adjust the deflection characteristics of the system, the blade member comprising a deflection region for deflecting the air or gas flow and a resilient region at least a part of which cooperates with the track to retain the blade member in a substantially fixed angular position relative to the track, when the blade member is in use.
When the desired relative angular position of the blade member has been attained, cooperation between the resilient region and the track serves to maintain the blade member in a substantially fixed angular position.
By providing the blade member with a resilient region, the blade member can easily be mounted either internally or externally on the track. The resilience of the region compensates for any inaccuracies in the dimensions of the track andlor the blade member, such that manufacturing tolerances are improved.
The blade member is preferably formed from a plastic material by means of, for example, a conventional plastic injection moulding technique or a conventional plastic extrusion technique. By forming the blade member from a plastic material, as opposed to forming the blade member from aluminium, the cost of the blade member is reduced.
In one embodiment of the invention, the blade member may include a mounting region to be received, in use, within a track forming part of the circulation system, the blade member being angularly moveable relative to the track to adjust the deflection characteristics of the system, wherein the mounting portion is shaped to form a clearance fit with the track, the resilient region being provided on the mounting portion such that at least a part of the resilient region co-operates with the track to retain the blade member in a substantially fixed angular position relative to the track when in use.
The deflection blade member may be provided with a plurality of resilient regions arranged along the length of the blade member.
By providing the blade member with one or more resilient regions, the mounting region of the blade member can be shaped so as to form a clearance fit with the track whilst still ensuring the blade member will remain substantially fixed in its selected angular position when the circulation system is in use.
The or each resilient region may conveniently take the form of a resilient bridge member, the mounting region being provided with a plurality of recesses and each bridge member being arranged to span an associated one of the recesses.
The or each bridge member includes an additional resilient portion of substantially part-circular or C-shaped form, the additional resilient portion being engaged between the bridge member and a surface defined by the associated recess, thereby increasing the resilience of the bridge member. As the resilience of the bridge member is increased, there is a greater resistance to the compressive force applied to the bridge member upon insertion of the blade member into the track. The blade member is therefore retained more securely in the selected angular position.
Preferably, the mounting region of the blade member has a substantially circular cross-section.
In an alternative embodiment of the invention, the resilient region may have a cross section of C-shaped form.
The resilient region may have an outer surface shaped to form an interference fit with the internal surface of the track, the resilient region being received within the track upon assembly. The resilience of the region serves to urge the region into engagement with the internal surface of the track when inserted therein to retain the blade member in a substantially fixed angular position.
Alternatively, the resilient region may have an internal surface shaped to cooperate with the outer surface of the track. By arranging the resilient region externally on the track, a further advantage is obtained as it is not ne cessary to insert the blade member into an open end of the track and to push the blade member along the length of the track to assemble the system. Instead, the resilient region can be clipped or "snap-fitted" onto the outer surface of the track.
The blade member may include two resilient regions, one region being located at each end of the blade member.
Alternatively, the blade member may include one resilient region extending along the length of the blade member. The resilient region extending along the length of the track may include a portion which forms a clearance fit with the internal surface of the track.
The provision of a portion which forms a clearance fit with the internal surface of the track eases insertion of the resilient region into the track upon assembly.
The deflection region of the blade member may include a region of planar form. Alternatively, or additionally, the deflection region may include a region of curved form.
Preferably, the blade member takes the form of an air deflection blade member for deflecting an air flow in a ventilation or air conditioning system.
For the purpose of this specification, the phrase "circulation system" shall be taken to include any portable or fixed system for circulating, deflecting or otherwise routing an air or gas flow, including a ventilation system, an air conditioning system and a heating system.
The invention will now be described, by way of example only, with reference to the accompanying figures in which; Figure 1 is a perspective view of a part of a conventional blade for use in a ventilation system; Figure 2 is a front view of a blade member in accordance with an embodiment of the present invention; Figure 3 is a perspective view of the blade member in Figure 2, mounted in a track forming part of a ventilation system; Figure 4 is a perspective view of an alternative embodiment of the blade member of the present invention; Figure 5 is an end view of the blade member in Figure 4; Figure 6 is a front view of a part of an alternative embodiment of the iinvention; Figure 7 is a perspective view of a further alternative embodiment of the invention; Figure 8 is an end view of the blade member in Figure 7; Figure 9 is an end view of a further alternative embodiment of the invention; and Figures 10 and 11 are perspective views of further alternative embodiments.
Referring to Figures 2 and 3, a blade member 20 for use in a ventilation or air conditioning system includes a planar region 20a which serves to deflect air flow, in use, and an enlarged mounting region 20b which is received within a track or runner 24 forming part of a base plate member 26. The track 24 is of tubular form and has an opening 28 provided along the length of the track- 24 through which the planar region 20a of the blade member 20 projects. The track 24 has an inner surface 25 of substantially circular crosssection, the diameter of the inner surface 25 and the diameter of the region 20b of the blade member 20 being arranged such that the region 20b forms a clearance fit 34 with the inner surface 25 of the track 24.
The blade member 20 further comprises a plurality of resilient members 30 (only two of which are shown in Figure 2), each resilient member 30 taking the form of a bridge member which spans one of a plurality of recesses or grooves 32 provided in the region 20b of the blade member 20. It will be appreciated that, in practice, each blade member 20 may include more than two resilient members 30, depending upon the length of the blade member 20. Typically, for example, the blade member 20 may be 500 mm in length and will include six resilient members equi-distantly spaced along the length of the region 20b.
Upon assembly, the blade member 20 is inserted through an open end of the track 24 and is pushed through the length of the track 24 until the blade 20 is fully inserted therein, the resilience of the members 30 cooperating with the inner surface 25 of the track 24 to ensure the blade member 20 will be retained in a substantially fixed position relative to the track 24, in use, when the blade member 20 is adjusted to the desired angular position. Insertion of the blade member 20 can be achieved relatively easily as the region 20b forms a clearance fit with the inner surface 25 of the track 24. Additionally, manufacturing tolerances are improved.
The blade member 20 is formed using a conventional injection plastic moulding technique which would be familiar to a person skilled in the art, each blade member 20 typically being 500 nun in length. The length of the track 24 is usually of the order of 3 metres and, hence, several blade members 20 can be inserted into a single track 24, in use. The base plate member 26 may be provided with a plurality of tracks 24 which are arranged in parallel, each of the tracks 24 receiving one or more blade members 20 to 19- provide an array of blade members which deflect air flow through the ventilation system in the desired manner.
Referring to Figures 4 and 5, in an alternative embodiment of the invention, the blade member 20 includes a region 20c of curved form remote from the region 20b. A blade member 20 having a curved region 20c provides different air deflection characteristics and may be preferred for some applications. It will be appreciated that, although not shown in Figure 4, this embodiment of the blade member 20 also includes resilient members 30, as described previously, as can be seen in Figure 5.
It will be appreciated that the resilient members 30 provided on the mounting region 20b need not take the form of bridge members but may take the form of any resilient means which, when the blade member 20 is received through the track 24, cooperate with the inner surface of the track to ensure the blade member 20 adopts a substantially fixed angular position, as selected by the user.
As shown in Figure 6, the resilient member 30 may be provided with an additional resilient portion 30a of substantially part-circular or Cshaped form arranged within the groove 32 provided in the blade member 20. The resilient portion 30a is engaged between the bridge member and a surface defined by the groove, the provision of the additional resilient portion 30a serving to increase the resilience of the member 30 such that there is a higher resistance to the compressive force applied to the member 30 upon insertion of the blade member 20 into the track 24. The resilient member 30, including the additional resilient portion 30a, may be integrally formed with the remainder of the blade member 20 using a conventional injection plastic moulding technique, as described previously. It will be appreciated that, if a plurality of resilient members 30 are provided, it may be preferable, but not essential, to provide each resilient member 30 with an additional resilient portion 30a.
Figure 7 shows an alternative embodiment of the invention in which the blade member includes two resilient regions 40a, 40b having a cross section of Cshaped form, one region 40a, 40b being located at each end of the region 20a. In use, the regions 40a, 40b are received within the track 24.
As can be seen most clearly in Figure 8, the outer surface of the region 40a is shaped to form an interference fit with the internal surface of the track 24. Upon assembly, the blade member 20 may be inserted into an open end of the track 24 and pushed along its length. The resilience of the regions 40a, 40b permits any inaccuracies in the diameter of the internal surface of the track 24 to be compensated for as the blade member 20 is pushed through the track 24. When fully inserted into the track 24, the resilience of the regions 40a, 40b serves to urge the outer surface of the regions 40a, 40b against the inner surface of the track 24 so as to retain the blade member 20 in a substantially fixed angular position relative to the track 24.
Figure 9 shows a further alternative embodiment in which the region 40a is shaped to have an internal surface which cooperates with the outer surface of the track 24 to secure the blade member 20 in position. In this case, the track 24 may take the form of a cylindrically shaped member. In the illustration shown the track 24 is of solid form, but this is not essential. The region 40a of the blade member 20 is shaped to ensure that, when the inner surface of the region 40a engages the outer surface of the track 24, the resilience of the region 40a ensures the blade member is maintained in a substantially fixed position relative to the track 24. The embodiment of the invention in Figure 9 provides the advantage over that shown in Figures 7 and 8 in that the blade member 20 can be mounted on the track 24 by clipping the region 40a onto the track 24, as opposed to pushing the region 40a along the length of the track 24. It will be appreciated, however, that the blade member 20 may be assembled onto the track 24 by pushing the region 4% along the length of the track 24, if desired. Additionally, it will be appreciated that the blade member 20 in Figure 4 may be mounted upon a track 24 having a form similar to that shown in Figure 8.
The blade member 20 in Figures 7 to 9 may be formed using a conventional injection plastic moulding technique, as described previously. Each blade member 20 is typically 500 nun in length and the length of each of the resilient regions 40a, 40b is typically between 100 ram and 200 nun.
As an alternative to using an injection moulding technique, the blade member 20 may be formed using a conventional plastic extrusion technique which would be familiar to a person skilled in the art of plastic moulding. Figure 10 shows an embodiment of the invention which may be formed using this technique. The blade member 20 comprises a resilient region 40p extending along the entire length of the blade member 20. The resilient region 40p may be shaped to have an inner surface which cooperates with the outer surface of the track 24 when in use (as shown in Figure 9), the region 40c, being clipped onto the track 24 upon assembly. Alternatively, the resilient region 40c may have an outer surface which is shaped to cooperate with the internal surface of the track 24 such that the resilient region 40c may be inserted into the track 24 and pushed therethrough (as shown in Figure 8).
Figure I I shows a farther alternative embodiment of the invention, in which the blade member 20 includes two resilient regions 40d, 40e, one region being located at each end of the blade member 20. The regions 40d, 40e are of substantially C-shaped form, as described previously, and are shaped to form an interference fit with the internal surface of the track 24. The blade member 20 also includes an intermediate region 42 of substantially C-shaped form, the region 42 having a smaller diameter than the internal diameter of the track 24 such that the intermediate region 42 forms a clearance fit with the track 24. This further eases insertion of the blade member along the length of the track 24. As described previously, the resilience of the regions 40d, 40e ensures that, when the blade member is received within the track 24, it maintains a substantially fixed angular position relative to the track 24. Typically, the intermediate region 42 may have an external diameter approximately 0. 5 mm. smaller than the internal diameter of the track 24.
In practice, in any of the embodiments shown in Figures 7 to 11, the region 20a of the blade member 20 need not be of curved form and may, for example, be a planar region, depending on the required air or gas deflection characteristics of the system.
It will further be appreciated that the blade member may be used in any system in which it is desired to selectively direct the flow of air or gas and is not limited to use in a ventilation or air conditioning system. For example, the blade member may be used in a heating system.
Claims (16)
1. A deflection blade member for use in deflecting an air or gas flow in a circulation system, the blade member being angularly movable relative to a track forming part of the circulation system to adjust the deflection characteristics of the system, the blade member comprising a deflection region for deflecting the air or gas flow and a resilient region at least a part of which co-operates with the track to retain the blade member in a substantially fixed angular position relative to the track, when the blade member is in use.
2. A deflection blade member as claimed in Claim 1, wherein the blade member is formed from a plastic material.
3. A deflection blade member as claimed in Claim 1 or Claim 2, wherein the blade member is provided with a plurality of resilient regions arranged along the length of the blade member.
4. A deflection blade member as claimed in any of Claims 1 to 3, comprising a mounting region to be received, in use, within a track forming part of the circulation system, the blade member being angularly moveable relative to the track to adjust the deflection characteristics of the system, in use, wherein the mounting portion is shaped to form a clearance fit with the track, the resilient region being provided on the mounting portion such that at least a part of the resilient region cooperates with the track to retain the -is- blade member in a substantially fixed angular position relative to the track when the blade member is in use.
5. A deflection blade member as claimed in Clahn 4, wherein the or each resilient region takes the form of a resilient bridge member, the mounting region being provided with one or more recesses, the or each bridge member being arranged to span an associated recess.
6. A deflection blade member as claimed in Claim 5, wherein the or each bridge member includes an additional resilient portion of substantially partcircular fonn, the additional resilient portion being engaged between the bridge member and a surface defined by the associated recess provided on the mounting region, thereby increasing the resilience of the bridge member.
7. A deflection blade member as claimed in any of Claims 4 to 6, wherein the mounting region has a substantially circular cross-section.
8. A deflection blade member as claimed in any of Claims 1 to 3, wherein the resilient region has a cross section of substantially C-shaped form.
9. A deflection blade member as claimed in Claim 8, wherein the resilient region has an outer surface shaped to form an interference fit with an internal surface of the track, the resilient region being received within the track upon assembly, the resilience of the resilient region serving to urge the resilient region into engagement with the internal surface of the track to retain the blade member in a substantially fixed angular position relative to the track, in use.
10. A deflection blade member as claimed in Claim 8, wherein the resilient region has an internal surface shaped to cooperate with an outer surface of the track.
11. A deflection blade member as claimed in any of Claims 8 to 10, including two resilient regions, one resilient region being located at each end of the blade member.
12. A deflection blade member as claimed in Claim 9, including one resilient region extending along the length of the blade member.
13. A deflection blade member as claimed in Claim 12, wherein the resilient region includes a portion which forms a clearance fit with the internal surface of the track.
14. A deflection blade member as claimed in any of Claims 1 to 13, wherein the deflection region of the blade member includes a region of planar form.
15. A deflection blade member as claimed in any of Claims 1 to 14, wherein the deflection region includes a region of curved form.
16. A deflection blade member substantially as herein described with reference to the accompanying Figures 2 to 11.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GBGB9928600.7A GB9928600D0 (en) | 1999-12-04 | 1999-12-04 | Deflection blade |
| GBGB9930873.6A GB9930873D0 (en) | 1999-12-24 | 1999-12-24 | Deflection blade |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB0029069D0 GB0029069D0 (en) | 2001-01-10 |
| GB2358701A true GB2358701A (en) | 2001-08-01 |
Family
ID=26316103
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB0029069A Withdrawn GB2358701A (en) | 1999-12-04 | 2000-11-29 | Air or gas deflection blade |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2358701A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105371466A (en) * | 2015-12-07 | 2016-03-02 | 珠海格力电器股份有限公司 | Air guide mechanism and air conditioner indoor unit |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1230575A (en) * | 1967-05-10 | 1971-05-05 | ||
| GB2039028A (en) * | 1978-05-06 | 1980-07-30 | Wild Mfg Co W J | Window ventilator |
| US4733515A (en) * | 1985-03-22 | 1988-03-29 | Eltreva Ag | Fixing arrangement for shutter blades |
| GB2299664A (en) * | 1995-03-31 | 1996-10-09 | Hardware & Systems Patents Ltd | Ventilator |
-
2000
- 2000-11-29 GB GB0029069A patent/GB2358701A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1230575A (en) * | 1967-05-10 | 1971-05-05 | ||
| GB2039028A (en) * | 1978-05-06 | 1980-07-30 | Wild Mfg Co W J | Window ventilator |
| US4733515A (en) * | 1985-03-22 | 1988-03-29 | Eltreva Ag | Fixing arrangement for shutter blades |
| GB2299664A (en) * | 1995-03-31 | 1996-10-09 | Hardware & Systems Patents Ltd | Ventilator |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105371466A (en) * | 2015-12-07 | 2016-03-02 | 珠海格力电器股份有限公司 | Air guide mechanism and air conditioner indoor unit |
| CN105371466B (en) * | 2015-12-07 | 2019-06-07 | 珠海格力电器股份有限公司 | Air guide mechanism and air conditioner indoor unit |
Also Published As
| Publication number | Publication date |
|---|---|
| GB0029069D0 (en) | 2001-01-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |