FI84857C - REGLERINGS- OCH STAENGANORDNING FOER GASSTROEMMAR. - Google Patents

Description

1 84857

Gas flow regulating and shut-off device

The invention relates to a device according to the preamble of claim 1 for regulating and shutting off gas flows in an air conditioning plant.

The air conditioner usually has the following separate devices for regulating or closing the air flow 10 - outdoor air shut-off damper - exhaust air shut-off damper - recirculated air damper - heat recovery transmitter control damper and bypass damper 15

Usually, the control, closing and bypass dampers have a slatted damper structure consisting of a plurality of slats mounted side by side on parallel pivot axes so that in the closed position the slats together form an air-covering plate and in the open position like manner.

.. Another type of device (not slatted) is already known in patent application FI-841 809.

the device comprises a heat recovery device, a heat exchanger, a supply air opening and a closing means for closing the supply air opening of the bypass duct, optionally in different pivoting positions, and is intended only as a control and bypass means for the heat recovery exchanger.

. Existing air conditioners require separate dampers with their own damper motors to shut off the outdoor and exhaust air flow, to adjust the recirculated air flow and. 35 for heat recovery converter adjustment and bypass. The biggest drawback is undoubtedly the large number of dampers and damper motors, the need for space and the amount of installation work.

2 84857 The difficulty of sealing damper dampers has also hitherto been a significant drawback, since the closure member consists of a number of dampers, all of which must be sealed to one another and also to the frame or body of the device on all sides.

The device according to the invention provides a decisive improvement over the above-mentioned drawbacks. To achieve this, the device according to the invention is characterized by what is set forth in the characterizing part of claim 1.

The most important advantage of the invention can be considered that the number of devices required in the air conditioning plant and the space requirement required by the devices 15 are reduced. A further advantage is that the reduction in equipment increases the reliability of the air conditioning plant without reducing the functions. Operational reliability and accuracy are also increased by the fact that the device according to the invention has a good and secure sealing tightness.

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In the following, the invention will be explained in detail with reference to the accompanying drawings.

Figure 1 shows an embodiment 25 of a device according to the invention in a partially sectioned side and top view.

Figures 2-5 show an application of the embodiment of the invention shown in Figure 1 as a control and closing device of an air conditioning plant in different operating modes of the device.

30

The device according to the invention has two or more control flaps 1a to c, 8 connected to each other by means of a lever 3 for adjusting the gas flows, the angle between the fully open and fully closed positions being A or B, which is preferably 45 °. The control flaps 1a to c, 8 can move an overall angle of 2A, because in this case angle A = angle B, i.e. preferably 90 °, whereby the position of the flaps 3 84857 is changed from the first fully closed position 9 via the fully open position 10 to the second fully closed to position 11.

Thus, in the embodiment of Figure 1, there are a total of four control channels for the airflows 7a-c and 12, which in this case are separated by partitions 13 and the environment by end walls 14 and side wall 15. Air flows through the device through side walls 15 and partitions 13 or end walls 14 respectively. parallel and guided. Thus, each control duct preferably has one control flap 1a to c or 8, which in the fully open position is parallel to the corresponding air flow, whereby the angle α = 0 °. From this, the control flap can be turned in the second direction, where the angle α approaches the angle α = + A of the first closed position, or in the second direction, whereby the angle α approaches the angle α = -A of the second closed position (i.e. = B).

The apparatus according to Figure 1 thus operates as a whole as follows:

In the closed position of the air flows 7a to c, 12, all control flaps 1a to c, 8 are in the fully closed position (a = + A, preferably 45 °; .25 when the control levers 3 are turned to 45 ° or by another design angle, the other control flaps 1a to c are , with the exception of the so-called bypass channel control flap 8 (still fully closed, a = + A) fully open (a = 0 °), 30 when the control levers 3 are further rotated by the same 45 ° or other corresponding design dimension (i.e. a total of 0 ° -> 90 °), the other control flaps 1a to c move further to the second fully closed position (a = -A »B) and the bypass channel control flap 8 opens fully to the open position 35 (a = 0 °).

The shut-off and control flaps are sealed in the channel partitions 13 4 84857 and the end walls 14, respectively, either by sealing flanges or sealing strips 6 and in the side walls 15 by sealing flanges or sealing strips 2. The spring 4 or counterweight ensures the retention and tightness of the bypass control flap.

The adjusting and closing flaps are pivoted by means of shafts 16 rigidly attached to the levers 3, each flap pivoting on its own shaft 16. The other ends of the levers 3 are fixed by bearings 30 to the rod 17 or its articulation part 18.

10 A drive device, such as a motor ri 5, is connected to one of the shafts 16. to rotate the shaft. Similarly, the second shafts 16 which are directly mounted on the rod 17 by the lever 3 are also rotated by means of the rod 17. If the lever 3 is mounted on a hinge part 18, which in turn is 15, there is a play, for example a groove 19 therein and a pin 17 20, fixed to the rod 17, the flap 8 of the shaft in question pivots only beyond the clearance with respect to the movement of the rod 17. In this way, the movement of the flap 8 is phased out with the movement of the other flaps 1a to c20. In the embodiment of Figure 1, the phase difference or omission is of the magnitude of an angle A (i.e. preferably 45 °).

Most preferably, the shafts 16 are located in the middle of the flaps 1 or the like 8 transversely to the flow in order to minimize the moment caused by the flow.

When the device according to the invention is applied in a ventilation heat recovery device comprising a cross-flow plate heat exchanger and its bypass duct, the two control and shut-off devices described above (Fig. 1) are used. This control and shut-off device assembly is shown in Figures 2-5. For the sake of clarity, only the control and shut-off devices according to the invention are shown as a whole, but not the heat exchanger and other conventional components.

5,84857

Figure 2 shows a situation in which the air conditioning plant is stopped and the device according to the invention shuts off the flow both at its outlets and at its inlets. All control flaps 21a -c, 31a-c, 28, 38 are in their fully closed position.

5

Figure 3 shows a situation in which the air conditioning plant is in operation and the exhaust air P and the supply air T flow through the heat exchanger. The control flaps 21a to c, 31a to c at the heat exchanger are in their fully open position and the control flaps 28, 38 at the bypass duct 10 are in their fully closed position, closing the bypass flow channel.

Fig. 4 shows a situation in which the air conditioner is in operation and the exhaust air P flows through the heat exchanger and the supply air T flows through the bypass duct of the heat exchanger.

The exhaust air control flaps 31a -c at the heat exchanger are in the fully open position and the exhaust air control flap 38 at the bypass duct is in the fully closed position. The supply air control flaps 20 21a to c at the heat exchanger are in their fully closed position and the supply air control flap 28 at the bypass duct is in its fully open position.

Figure 5 shows a situation where the air conditioner does not take 25 outdoor air. The supply air T at the heat exchanger

all control flaps 21a to c, 28 are in their fully closed position. The exhaust air control flaps 31a to c at the heat exchanger are in their fully closed position and the exhaust air control flap 38 at the bypass duct is in its fully open position. The air conditioning system is then in recirculated air mode.

The invention is, of course, also suitable for use in non-air-conditioning plants as a device for bypassing, regulating and shutting off gas flow distribution and equipment.

Depending on the application, there can be two control and shut-off channels, 6,84857 three, four or more. The angle of movement of the control and closing flaps can be selected according to the situation where the angle A, i.e. the angle between the fully closed position and the fully open position, can be at least a few degrees at its smallest and 90 ° at its mouth. Most preferably it is between 30 and 60 ° and especially 45 °. The angle between the fully closed positions is typically twice that of the above angle, i.e. 2 x A, where the angle A = angle B. However, it is conceivable that the movement on both sides of the open position would be asymmetrical or close in the other direction against a separate flange. , in a different way than in the other direction, where the angle A £ is the angle B and the angle between the fully closed positions would be A + B.

15 The lever mechanism can also be designed as required using different lever and crank mechanisms to connect the levers 3 to each other and to the drive. By applying both the asymmetrical movement or closure of the flap and the various lever mechanisms, the device according to the invention can perform even complex control operations with only one actuator or with considerably fewer or simpler actuators.

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Claims (4)

An apparatus for controlling and closing separate air streams having two or more through a closing thread (3) coupled to each other in relation to parallel control slides (1, 8) of the flow (7) which are separated from each other by intermediate walls (13), wherein the position of the slides is changed from a first closing position (9) via an open position (10) to a second closing position (11) and in each flow channel the winkkein between the full opening position of the slide and its first complete closing position is A and the winkkein between the opening position and the second The complete closing position is B, and the control slides can move in a + A + B, characterized in that the control slides open in separate channels with a phase difference in relation to each other, such that a part (8) of the control slides in a first channel group (12 ) opens from its closing position (9) only then a portion (1a-c) of the control slides in a second cage nal group (7a-c) has opened from its closing position (9) towards the open position (10) and starts to move towards the second closing position (10). - 25 Device according to claim 1, characterized in that the winkein A between the first closing position (9) and the opening position (10) is equal to the winkein B between the second closing position (11) and the opening position (10), and that the winkein A and the winkein B is between 30-60 °, preferably about 45 °. Device according to claim 1 or 2, characterized in that each control slide (1, 8) is sealed in its closed positions against the flow channels' intermediate walls (13) or against end walls (14) and against the side walls (15), respectively. slide (1, 8) is stored with a shaft (16) located in the middle of the slide in the side walls (15) and the levers (3) are rigidly attached to the shafts (16) to swing the slides with the levers (3) by the shafts (16). 9 84857 Device according to claim 3, characterized in that the levers (3) are joined by individual bearings (30) or a linkage mechanism (18; 19; 20) in the rod (17), by which a driving device (5) pivots each of the associated slides (1a-c, 8) with different channel groups of a phase difference 1 and, if necessary, further with the same phase in the same channel group (7a-c).