WO1989002566A1 - A device for controlling and closing gas flows - Google Patents

A device for controlling and closing gas flows Download PDF

Info

Publication number
WO1989002566A1
WO1989002566A1 PCT/FI1988/000148 FI8800148W WO8902566A1 WO 1989002566 A1 WO1989002566 A1 WO 1989002566A1 FI 8800148 W FI8800148 W FI 8800148W WO 8902566 A1 WO8902566 A1 WO 8902566A1
Authority
WO
WIPO (PCT)
Prior art keywords
closed position
dampers
angle
control
air
Prior art date
Application number
PCT/FI1988/000148
Other languages
French (fr)
Inventor
Tapio Paananen
Mikko Nyman
Juhani Laine
Original Assignee
Ilmaterä Oy
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ilmaterä Oy filed Critical Ilmaterä Oy
Publication of WO1989002566A1 publication Critical patent/WO1989002566A1/en
Priority to NO901180A priority Critical patent/NO169196C/en
Priority to SE9000928A priority patent/SE500892C2/en
Priority to DK067790A priority patent/DK67790D0/en

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
    • F24F13/15—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

Definitions

  • a device for controlling and closing gas flows
  • the invention relates to a device for controlling and closing gas flows in an air-conditioning plant.
  • An air-conditioning plant has usually the following sepa ⁇ rate devices designed for controlling and closing the air flow
  • fresh-air closing damper exhaust-air closing damper circulation-air dampers control damper and bypass damper of the heat recovery exchanger
  • control, closing and bypass dampers are louver- structured and are made up of a number of louver blades installed adjacently on parallel turning shafts so that in the closing position the louver blades together form a plate covering the air aperture and in the open position they rotate onto planes parallel to the flow and form numerous through-flow gaps in the manner of Venetian blinds.
  • a previously known device of another type (not louver- structured) is disclosed in patent application FI-841 809.
  • the said device comprises a heat recovery device, a heat exchange cell, an incoming-air inlet, and means for closing the bypass-conduct air inlet selectively in different turn ⁇ ing positions, and it is intended only for use as control and bypass means for a heat recovery exchanger.
  • louver-structured closing dampers The difficulty of sealing the louver-structured closing dampers has also been a significant disadvantage up to now, since the closing means is made up of a plurality of louver blades which must all be made air-tight in relation to one another and also on all their sides in relation to the device frame or body.
  • the device according to the invention provides a crucial improvement with respect to the disadvantages presented above.
  • the device according to the inven ⁇ tion is characterized in what is disclosed in the charac ⁇ terizing clause of Claim 1.
  • Figure 1 depicts partially sectional side and plan views of an embodiment of the device according to the invention.
  • Figures 2 - 5 depict the application of the embodiment depicted in Figure 1 as a control and closing device of an air-conditioning plant, in the various states of operation of the device.
  • the device according to the invention has two or more con ⁇ trol dampers la - c, 8, intended for the control of gas flows and interconnected by means of levers 3, the angle between the fully open and the fully closed positions of the dampers being A or B, which is preferably 45°.
  • the embodiment of Figure 1 thus has a total of four control ducts for air flows 7a - c and 12, the ducts being in this case separated from one another by partitions 13 and from the exterior by end walls 14 and a side walls 15.
  • the air flows travel through the device in parallel and under the control of the duct side walls 15 and partitions 13 or, respectively the end walls 14.
  • the closing and control dampers are sealed against the partitions 13 and respectively end walls 14 either by means of sealing flanges or sealing strips 6 and against the side walls 15 by means of sealing flanges or sealing strips 2.
  • a spring 4 or a counterweight ensures that the control damper of the bypass duct remains closed and is air-tight.
  • the control and closing dampers are turned by mediation of shafts 16 rigidly fastened to the levers 3, each damper turning about its own shaft 16.
  • the opposite ends of the levers 3 are mounted with bearings 30 to a bar 17 or its articulation part 18.
  • a drive device such as a motor 5 is attached to one of the shafts 16 to rotate the said shaft.
  • the bar 17 Through the transmission of the bar 17 also the other shafts 16 mounted with lever 3 to the bar 17 also rotate in the corresponding manner.
  • the damper 8 on the shaft in question turns only over the extent of that movement of the bar 17 which extends beyond the clearance. In this manner a phase difference is accomplished between the movement of the damper 8 and the movement of the other dampers la - c.
  • the pha"se difference or lag is of the magnitude of angle A (i.e. preferably 45°).
  • the shafts 16 are located in the middle of the dampers 1 or respectively 8, transversely in relation to the flow, to minimize the moment produced by the flow.
  • Figure 2 depicts a situation in which the air-conditioning plant is stopped and the device according to the invention is closing the flows of both exhaust air and incoming air. All control dampers 21a - c, 31a - c, 28, 38 are in their fully closed positions.
  • Figure 3 depicts a situation in which the air-conditioning plant is in operation and the exhaust air P and the in ⁇ coming air T are flowing through the heat exchanger.
  • the control dampers 21a - c, 31a - c located at the heat ex ⁇ changer are in their fully open position and the control dampers 28, 38 at the bypass duct are in their fully closed position, thereby closing the bypass-flow duct.
  • Figure 4 depicts a situation in which the air-conditioning plant is in operation and exhaust air P is flowing through the heat exchanger and incoming air T is flowing through the bypass duct of the heat exchanger.
  • the exhaust-air control dampers 31a - c at the heat exchanger are in their fully open position and the exhaust-air control damper 38 at the bypass duct is in its fully closed position.
  • the inlet air control dampers 21a - c at the heat exchanger are in their fully closed position and the inlet-air control damper 28 at the bypass duct is in its fully open position.
  • Figure 5 depicts a situation in which the air-conditioning plant is not taking in fresh air.
  • all the control dampers 21a - c, 28 for inlet air T are in their fully closed position.
  • the control dampers 31a - c for exhaust air P are in their fully closed position and at the bypass duct the exhaust- air control damper 38 is in- its fully open position.
  • the air-conditioning plant is in this case in circulation-air use.
  • the invention is, of course, suitable for use also in other than air-conditioning plants as a device for dividing gas flows- and as a bypass, control and closing device in var ⁇ ious apparatus.
  • angle A i.e. the angle be ⁇ tween the fully, closed position and the fully open posi ⁇ tion
  • angle B the angle between the fully closed positions is typically double the above-men ⁇ tioned angle, i.e. 2 x A, in which case angle A ⁇ angle B.
  • the lever mechanism can also be designed according to need by using various lever and camshaft mechanisms to connect the levers 3 to each other and to the drive apparatus.
  • the device according to the invention can be made to perform even complicated con ⁇ trol functions with only one drive device or with a consid ⁇ erably smaller number of drive devices, and simpler drive devices, than is conventional.

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)

Abstract

A device intended for controlling and closing gas flows in air-conditioning plants, the device having several parallel control dampers (1, 8) interconnected by means of a lever system (3), the position of the dampers shifting from the first closed position (9) via the open position (10) to the second closed position (11), in total over angle A + B, and that the control dampers open in relation to one another in a phase difference.

Description

A device for controlling and closing gas flows
The invention relates to a device for controlling and closing gas flows in an air-conditioning plant.
An air-conditioning plant has usually the following sepa¬ rate devices designed for controlling and closing the air flow
fresh-air closing damper exhaust-air closing damper circulation-air dampers control damper and bypass damper of the heat recovery exchanger
Usually- the control, closing and bypass dampers are louver- structured and are made up of a number of louver blades installed adjacently on parallel turning shafts so that in the closing position the louver blades together form a plate covering the air aperture and in the open position they rotate onto planes parallel to the flow and form numerous through-flow gaps in the manner of Venetian blinds.
A previously known device of another type (not louver- structured) is disclosed in patent application FI-841 809. The said device comprises a heat recovery device, a heat exchange cell, an incoming-air inlet, and means for closing the bypass-conduct air inlet selectively in different turn¬ ing positions, and it is intended only for use as control and bypass means for a heat recovery exchanger.
Present-day air-conditioning plants require separate dampers, equipped with their own damper motors, for closing the inlet and exhaust air flows, for controlling the bypass air flow and for the control and bypass of the heat re¬ covery exchanger. The greatest disadvantage is undoubtedly the large number and space requirement of the dampers and the damper motors, as well as the amount of installation work required.
The difficulty of sealing the louver-structured closing dampers has also been a significant disadvantage up to now, since the closing means is made up of a plurality of louver blades which must all be made air-tight in relation to one another and also on all their sides in relation to the device frame or body.
The device according to the invention provides a crucial improvement with respect to the disadvantages presented above. To realize this, the device according to the inven¬ tion is characterized in what is disclosed in the charac¬ terizing clause of Claim 1.
It can be regarded as the most important advantage of the invention that the number of devices required in the air- conditioning plant and the space requirement of the devices are reduced. It is a further advantage that the reduced number of devices increases the operational reliability of the air-conditioning plant without reducing its functions. The operational reliability and precision are further in¬ creased by the fact that the sealing of the dampers of the device according to the invention is good and reliable.
The invention is described below in detail with reference to the accompanying drawings.
Figure 1 depicts partially sectional side and plan views of an embodiment of the device according to the invention.
Figures 2 - 5 depict the application of the embodiment depicted in Figure 1 as a control and closing device of an air-conditioning plant, in the various states of operation of the device.
The device according to the invention has two or more con¬ trol dampers la - c, 8, intended for the control of gas flows and interconnected by means of levers 3, the angle between the fully open and the fully closed positions of the dampers being A or B, which is preferably 45°. The control dampers la - c, 8 may in total move over an angle of 2A, since in this case angle A = angle B, i.e. prefer¬ ably 90°, in which case the position of the dampers is shifted from the first fully closed position 9 via the fully open position 10 to the other fully closed position 11-
The embodiment of Figure 1 thus has a total of four control ducts for air flows 7a - c and 12, the ducts being in this case separated from one another by partitions 13 and from the exterior by end walls 14 and a side walls 15. The air flows travel through the device in parallel and under the control of the duct side walls 15 and partitions 13 or, respectively the end walls 14. Each control duct thus has preferably one control damper la - c or ,8, -which in the fully open position is parallel to the corresponding air flow, in which case angle α = 0°. From this, the control dampers can be turned in one direction, whereupon angle α approaches the angle α = +A of the first closed position, or in the other direction, whereupon the angle α approaches the angle α = -A (i.e. = B) of the other closed position.
The apparatus according to Figure 1 as a whole thus func¬ tions as follows:
In the position which closes air flows 7a - c, 12, all the control dampers la - c, 8 are in the fully closed position (α = +A, preferably 45°;
when the control levers 3 are turned to the position 45° or over some other structural angle, the other control dampers la - c, with the exception of the control damper 8 of the so-called bypass duct (still fully closed, α = +A) are fully open (α = 0°) ;
when the control levers 3 are turned further over the same 45° or an angle according to some other corresponding structural dimensioning (thus, for example, in total 0° - >90°), the other control dampers la - c move further to the other fully closed position (α = -A = B) and the control damper 8 of the bypass duct opens into the fully open posi¬ tion (α = 0°) .
The closing and control dampers are sealed against the partitions 13 and respectively end walls 14 either by means of sealing flanges or sealing strips 6 and against the side walls 15 by means of sealing flanges or sealing strips 2. A spring 4 or a counterweight ensures that the control damper of the bypass duct remains closed and is air-tight.
The control and closing dampers are turned by mediation of shafts 16 rigidly fastened to the levers 3, each damper turning about its own shaft 16. The opposite ends of the levers 3 are mounted with bearings 30 to a bar 17 or its articulation part 18. A drive device such as a motor 5 is attached to one of the shafts 16 to rotate the said shaft. Through the transmission of the bar 17 also the other shafts 16 mounted with lever 3 to the bar 17 also rotate in the corresponding manner. If the lever 3 is mounted on bearings to the articulation part 18, which for its part is fastened to the bar 17 with a clearance, for example by mediation of a groove 19 in it and a pin 20 in the bar 17, fitted in the groove, the damper 8 on the shaft in question turns only over the extent of that movement of the bar 17 which extends beyond the clearance. In this manner a phase difference is accomplished between the movement of the damper 8 and the movement of the other dampers la - c. In the embodiment of Figure 1 the pha"se difference or lag is of the magnitude of angle A (i.e. preferably 45°).
Preferably the shafts 16 are located in the middle of the dampers 1 or respectively 8, transversely in relation to the flow, to minimize the moment produced by the flow.
When the device according to the invention is applied to the heat recovery unit of ventilation, the unit comprising a plate heat exchanger operating according to the cross flow principle, and its bypass duct, two control and clos¬ ing devices described above (Figure 1) are used. This con¬ trol and closing device unit is shown in Figures 2 - 5. For the sake of clarity, only the control and closing devices according to the invention are shown as a whole but the heat exchanger and other conventional components are not shown.'
Figure 2 depicts a situation in which the air-conditioning plant is stopped and the device according to the invention is closing the flows of both exhaust air and incoming air. All control dampers 21a - c, 31a - c, 28, 38 are in their fully closed positions.
Figure 3 depicts a situation in which the air-conditioning plant is in operation and the exhaust air P and the in¬ coming air T are flowing through the heat exchanger. The control dampers 21a - c, 31a - c located at the heat ex¬ changer are in their fully open position and the control dampers 28, 38 at the bypass duct are in their fully closed position, thereby closing the bypass-flow duct. Figure 4 depicts a situation in which the air-conditioning plant is in operation and exhaust air P is flowing through the heat exchanger and incoming air T is flowing through the bypass duct of the heat exchanger. The exhaust-air control dampers 31a - c at the heat exchanger are in their fully open position and the exhaust-air control damper 38 at the bypass duct is in its fully closed position. The inlet air control dampers 21a - c at the heat exchanger are in their fully closed position and the inlet-air control damper 28 at the bypass duct is in its fully open position.
Figure 5 depicts a situation in which the air-conditioning plant is not taking in fresh air. At the heat exchanger all the control dampers 21a - c, 28 for inlet air T are in their fully closed position. At the heat exchanger the control dampers 31a - c for exhaust air P are in their fully closed position and at the bypass duct the exhaust- air control damper 38 is in- its fully open position. The air-conditioning plant is in this case in circulation-air use.
The invention is, of course, suitable for use also in other than air-conditioning plants as a device for dividing gas flows- and as a bypass, control and closing device in var¬ ious apparatus.
Depending on the use, there may be two, three, four or more control and closing ducts. The angle of movement of the control and closing dampers can be selected according to the situation, in which case angle A, i.e. the angle be¬ tween the fully, closed position and the fully open posi¬ tion, may at its smallest be only a few degrees and at its largest 90°. At its most advantageous it is within the range 30 - 60°, and specifically 45°. The angle between the fully closed positions is typically double the above-men¬ tioned angle, i.e. 2 x A, in which case angle A ≠ angle B. It can, however, be thought that the movement on the two sides of the open position would be asymmetrical or that the closing in one direction would take place against a separate flange, in a manner different from that in the other direction, in which case angle A = angle B and the angle between the fully closed positions would be A + B.
The lever mechanism can also be designed according to need by using various lever and camshaft mechanisms to connect the levers 3 to each other and to the drive apparatus. By applying both an asymmetrical movement or closing of the damper and various lever mechanisms the device according to the invention can be made to perform even complicated con¬ trol functions with only one drive device or with a consid¬ erably smaller number of drive devices, and simpler drive devices, than is conventional.

Claims

Claims
1. A device intended for controlling and closing gas flows, the device having two or more control dampers (1, 8) which are interconnected by means of levers (3) and paral¬ lel in relation to the direction of the flow (7), charac¬ terized in that the angle between the fully open position of these dampers and their first fully closed position is A and the angle between the open position and the second fully closed position is B, and that the control dampers can move over the angle A + B, whereby the position of the dampers is shifted from the first closed position (9) via the open position (10) to the second closed position (11), and that the control dampers open in relation to each other in a phase difference so that some of the control dampers open from their closed position (9) only .after some of the control dampers have opened from their closed position (9) towards the 'open position (10) and are beginning to move towards the second closed position (11).
2. A device according to Claim 1, characterized in that the angle A between the first closed position and the open position is equal to the angle B between the second closed position and the open position.
3. A device according to Claim 1 or 2, characterized in that in their open position the control dampers (1, 8) are parallel to the gas flow (7) and in their closed position they are at an angle A or B to the gas flow.
4. A device according to Claim 2 or 3, characterized in that angle A and angle B are within the range 30 - 60°, preferably approximately 45°.
5. A device according to any of the above claims, charac¬ terized in that the control dampers (1, 8) each in its closed position seals against the partitions (13) or re¬ spectively end walls (14) and side walls (15) of the flow ducts, that each damper (1, 8) bears by mediation of a shaft (16), located approximately in the middle of the damper, on -he side walls (15), and that the levers (3) are fastened rigidly to the shafts (16) in order to turn the levers (3) by transmission of the shafts (16).
6. A device according to Claim 5, characterized in that the levers (3) are connected by means of individual bear¬ ings (30) or an articulation mechanism (18; 19; 20) to a bar (17) by transmission of which one drive device (5) turns all of the dampers (la - c, 8) connected to it in the same phase or in different phases.
PCT/FI1988/000148 1987-09-15 1988-09-14 A device for controlling and closing gas flows WO1989002566A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
NO901180A NO169196C (en) 1987-09-15 1990-03-13 DEVICE FOR CONTROL AND CLOSING OF GAS FLOWS.
SE9000928A SE500892C2 (en) 1987-09-15 1990-03-15 Device for controlling and switching off gas flows having several parallel control valves
DK067790A DK67790D0 (en) 1987-09-15 1990-03-15 DEVICE FOR REGULATING AND CLOSING AIR FLOWS

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI874008 1987-09-15
FI874008A FI84857C (en) 1987-09-15 1987-09-15 REGLERINGS- OCH STAENGANORDNING FOER GASSTROEMMAR.

Publications (1)

Publication Number Publication Date
WO1989002566A1 true WO1989002566A1 (en) 1989-03-23

Family

ID=8525062

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI1988/000148 WO1989002566A1 (en) 1987-09-15 1988-09-14 A device for controlling and closing gas flows

Country Status (5)

Country Link
CA (1) CA1299425C (en)
DK (1) DK67790D0 (en)
FI (1) FI84857C (en)
SE (1) SE500892C2 (en)
WO (1) WO1989002566A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6789618B2 (en) * 2001-09-05 2004-09-14 Frederick J. Pearson Energy recycling air handling system

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB998364A (en) * 1961-11-10 1965-07-14 American Air Filter Co Improvements in or relating to room ventilators
GB998363A (en) * 1961-08-31 1965-07-14 American Air Filter Co Improvements in or relating to damper operating arrangements for ventilators
US3768729A (en) * 1971-08-12 1973-10-30 Tempmaster Corp Delayed action dampers for air terminal units
DE2416417A1 (en) * 1973-04-06 1974-10-24 Colt Int Ltd ADJUSTABLE VENTILATION DEVICE
DE2503435A1 (en) * 1974-02-01 1975-08-07 Aeronca Inc MIXING VALVE, E.g. FOR AIR FLOW
US3967779A (en) * 1974-02-01 1976-07-06 Aeronca, Inc. Air mixing valve having a thermal motor actuator for effecting adjustment
SE407618B (en) * 1972-03-01 1979-04-02 Marlo Spa INDUCTION TYPE APPLIANCE FOR AIR CONDITIONING SYSTEM
FR2456909A1 (en) * 1979-05-14 1980-12-12 Trane Co AIR CONDITIONING DEVICE REGISTER
US4653384A (en) * 1985-12-31 1987-03-31 Kabushiki Kaisha Toshiba Air supply adjusting mechanism for air conditioner
FI73817B (en) * 1981-03-06 1987-07-31 Hess & Cie Pilgersteg GALLERFORMAD FOERDELNINGSANORDNING FOER INLUFT FOER AVKYLNING ELLER UPPVAERMING AV ETT RUM.

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB998363A (en) * 1961-08-31 1965-07-14 American Air Filter Co Improvements in or relating to damper operating arrangements for ventilators
GB998364A (en) * 1961-11-10 1965-07-14 American Air Filter Co Improvements in or relating to room ventilators
US3768729A (en) * 1971-08-12 1973-10-30 Tempmaster Corp Delayed action dampers for air terminal units
SE407618B (en) * 1972-03-01 1979-04-02 Marlo Spa INDUCTION TYPE APPLIANCE FOR AIR CONDITIONING SYSTEM
DE2416417A1 (en) * 1973-04-06 1974-10-24 Colt Int Ltd ADJUSTABLE VENTILATION DEVICE
DE2503435A1 (en) * 1974-02-01 1975-08-07 Aeronca Inc MIXING VALVE, E.g. FOR AIR FLOW
US3967779A (en) * 1974-02-01 1976-07-06 Aeronca, Inc. Air mixing valve having a thermal motor actuator for effecting adjustment
FR2456909A1 (en) * 1979-05-14 1980-12-12 Trane Co AIR CONDITIONING DEVICE REGISTER
FI73817B (en) * 1981-03-06 1987-07-31 Hess & Cie Pilgersteg GALLERFORMAD FOERDELNINGSANORDNING FOER INLUFT FOER AVKYLNING ELLER UPPVAERMING AV ETT RUM.
US4653384A (en) * 1985-12-31 1987-03-31 Kabushiki Kaisha Toshiba Air supply adjusting mechanism for air conditioner

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6789618B2 (en) * 2001-09-05 2004-09-14 Frederick J. Pearson Energy recycling air handling system

Also Published As

Publication number Publication date
FI874008A0 (en) 1987-09-15
FI874008A (en) 1989-03-16
FI84857B (en) 1991-10-15
SE500892C2 (en) 1994-09-26
FI84857C (en) 1992-01-27
DK67790A (en) 1990-03-15
CA1299425C (en) 1992-04-28
SE9000928L (en) 1990-03-15
SE9000928D0 (en) 1990-03-15
DK67790D0 (en) 1990-03-15

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