NO343515B1 - Method and apparatus for regulating a spreader - Google Patents

Description

Method and device for regulating a spreader

TECHNICAL AREA

The invention relates to a method according to the preamble to claim 1.

The invention also relates to a device according to the preamble to claim 4.

STATE OF THE ART

With a spreader, supply air is introduced into a room area in such a way that a jet of supply air can be distributed in the desired way in the room area. The range of the supply air jet can be dimensioned optimally, whereby the air can be distributed in the room area without drafts. In solutions according to the state of the art, the range of the supply air jet that flows out from the diffuser, i.e. the throw length, can be regulated throughout so that the throw length of the supply air jet is always kept constant in a system with alternating air flow and the distribution of the supply air jet is kept as desired.

Utility model application DE 202 04 970 U1 describes a supply air device which includes a supply air chamber designed in an elongated housing which provides an inlet opening and an outlet opening for fresh air. The exit opening is formed by nozzles or a nozzle slot. Below the supply air chamber there is a mixing chamber to which fresh air is led through the nozzles or the nozzle gap in the outlet opening from the supply air chamber. The flow of fresh air directed to the mixing chamber induces a circulation air flow to flow from a room area to be ventilated through a heat exchanger to the mixing chamber. Below the mixing chamber there is an outlet channel from the supply air device through which a combined supply air flow formed by fresh air and circulation air is led to the area to be ventilated. In the outlet duct there is an adjustable air control element in the direction of the outlet duct. The air control element includes a shaft transverse to the outlet channel and a flap pivotably arranged on the shaft. With the air control element, the direction of the supply air flow that flows from the supply air device into the room area to be ventilated is regulated in such a way that the supply air flow is controlled straight down or straight to the side.

In practice, the spread of the beam from the diffuser is also affected by convection currents caused by external heat sources in relation to the heating and cooling system in the room area to be ventilated. Such external heat sources in relation to the heating and cooling system in the room area to be ventilated are, for example, people in the room area and sunlight radiating into the room area through windows. Particularly one-sided heat loads in the room area to be ventilated can swing the supply air flow from the diffuser so that it is one-sided. This becomes a particular problem in situations where the exhaust air devices in the air conditioning system are located on the opposite side of the room area to be ventilated in relation to the wall with a window in the room area. In such a case, the convection flow at the window can swing the supply air jet from the diffuser directly to the exhaust air device. The fresh air is thus not evenly distributed in the room area to be ventilated, which causes the efficiency of the ventilation in the room area to be ventilated to decrease, and in a cooling situation a temperature gradient is formed between a window zone and a corridor zone.

Another known technique is described in JP H11132490 A.

SUMMARY OF THE INVENTION

The most important characteristics of the method according to the invention appear from the characteristic of claim 1.

The most important characteristics of the device according to the invention appear from the characteristic of claim 4.

In the solution according to the invention, the temperature is measured on the inner surface of a window in an area to be ventilated with a temperature sensor arranged on the inner surface of the window, and a measurement signal from the sensor is sent to a control unit. With the regulation unit, a maneuvering device mounted in relation to an air duct in a spreader that regulates a regulating means is controlled, whereby the regulating means regulates the throw figure of the air flow flowing out from the air duct in the spreader to the area to be ventilated on the basis of the measured temperature so that the figure becomes asymmetrical .

With the solution according to the invention, the above-mentioned problems are reduced in connection with the distribution of fresh air from the diffuser, which problems are caused by external heat sources in relation to the heating and cooling system in the room area to be ventilated.

In a situation with maximum cooling in summer, the surface of a window in the room area to be ventilated is warm due to radiant heat from the sun. The heat load from the window then easily causes the jet of supply air from the roof diffuser to swing away from the window. This fluctuation of the jet of supply air from the roof diffuser can be prevented by making the jet of supply air from the roof diffuser one-sided so that a larger part of the supply air jet is directed in the direction of the window and a smaller part of the supply air jet is directed to another place in the room area to be ventilated.

In a situation with maximum heating in winter, the surface of the window in the area to be ventilated is, on the other hand, cold. A strong supply air jet directed from the roof diffuser towards the window can then cause a feeling of draft. The situation can be controlled by making the jet of supply air from the roof diffuser out into the room area to be ventilated unilateral, so that a smaller part of the supply air jet is directed in the direction of the window and a larger part of the supply air jet is directed to another place in the room area to be ventilated.

In a situation with maximum heating in winter where the room is empty and needs heating, a larger part of the supply air jet from the roof diffuser can be directed towards the cold window surface, thereby providing an effective mixing of the room air.

In the above case, the direction of the supply air jet from the roof diffuser can be controlled on the basis of a measurement signal from a temperature sensor mounted on the inner surface of the window.

The invention can be adapted to all diffusers placed in connection with a roof from which the flow of fresh air runs along the roof surface. The flow of fresh air can go out into the room area from the diffuser, for example in the form of a radial jet, vortex jet or a linear jet.

The solution according to the invention can of course also be adapted in a situation where one-sided heat load is caused by something other than the sun, whereby the control signals are taken from a place other than from the window temperature.

The invention is described below with reference to the figures in the attached drawings.

BRIEF DESCRIPTION OF THE FIGURES

Fig. 1 shows a cross section of a room area and the principles for regulating a spreader which is placed in connection with the ceiling in the area to be ventilated.

Fig. 2 shows a cross-section of a spreader placed in connection with the inner ceiling in the area to be ventilated and a device for regulating the spreader.

Fig. 3 shows a cross-section of the spreader shown in fig. 2 and another device for regulating the spreader.

Fig. 4 shows a cross-section of the spreader shown in fig. 2 and a third device for regulating the spreader.

Fig. 5 shows a cross-section of another spreader placed in connection with the inner ceiling in the area to be ventilated and a fourth device for regulating the spreader.

Fig. 6 shows a cross-section of a third spreader placed in connection with the inner ceiling in the area to be ventilated which also adapts the device for regulating the spreader shown in fig. 5.

DESCRIPTION OF ADVANTAGEOUS EMBODIMENTS

Fig. 1 shows a cross-section of a room area and the principles for regulating a spreader which is placed in connection with an inner ceiling in the area to be ventilated. In connection with the inner ceiling 12 in the area 10 to be ventilated, a spreader 50 is placed from which a jet LA, LB of supply air flows in the direction along the inner ceiling 12 out into the area 10 to be ventilated. A temperature sensor 20 is attached to the inner surface of a window 11 in the area to be ventilated, with which the temperature on the inner surface of the window 11 is measured. The temperature sensor 20 is connected to a control unit 30 which controls a maneuvering device 40. A suitable control means is connected to the control device 40, with the help of which the throw pattern of the jet of fresh air flowing from the diffuser 50 along the inner ceiling 12 in the area 10 which is to ventilated can be regulated in the desired way so that it becomes asymmetrical.

Fig. 2 shows a cross-section of a spreader placed in connection with the inner ceiling in the area to be ventilated and a device for regulating the spreader. It is a matter of a so-called radial spreader 50 which includes an air channel 51 circular in diameter, which is directed towards the area 10 to be ventilated, advantageously towards the floor of the area 10 to be ventilated. At the lower end of the air duct 51, there are control means 52a, 52b which consist of a round, closed bottom disc 52a and a round roof disc 52b located at a distance from this, which has an opening in the middle. At the opening, the roof disk 52b is united with the lower end of the air duct 51. Between the bottom disk 52a and the roof disk 52b, a radial control channel 52 is thus formed through which a downward flowing flow L1 of fresh air in the air channel 51 is controlled in the radial direction LA, LB out of the spreader 50 .

The spreader 50 also includes a regulating means 53a, 53b in the air duct 51. The regulating means 53a, 53b are formed in this embodiment by two horizontal, round regulating discs 53a, 53b located on top of each other in contact with each other. The first or upper regulating disk 53a rotates in a horizontal plane and the second or lower regulating disk 53b is firmly supported on the air duct 51. The first regulating disk 53a is supported through the provision of a vertical shaft 41 on a maneuvering means 40, which can be constituted by a drive motor. The first regulating disc 53a which is attached to the shaft 41 rotates driven by the drive motor 40, whereby the position of the disc in relation to the second fixed regulating disc 53b changes.

Each of the regulating disks 53a, 53b provides large openings through which a flow L1 of fresh air flows from the air channel 51 out into the control channel 52. When the first regulating disk 53a is rotated with the drive motor 40 to a first outermost position, the first openings in the first regulating disk 53a and other openings in the second regulating disc are in such a position in relation to each other that a larger free opening for fresh air L1 is formed on the left side of the engine 40 compared to the free opening on the right side of the engine 40. The left-directed air flow LA from the control channel 52 in the spreader 50 is thus larger than the right-directed air flow LB from the control channel 52. When the first rotatable regulation disc 53a is rotated to a second, in relation to the first outermost position opposite the outermost position, an opposite situation occurs. The left-directed airflow LA in the figure is then smaller than the right-directed airflow LB in the figure. When the first rotating control disc 53a is brought to an intermediate position between the outermost positions, the left-directed air flow LA in the figure is as large as the right-directed air flow LB in the figure. From the control channel 52 in the spreader 50, there is of course an air flow radially in all directions, but the left-directed air flow LA and the right-directed air flow LB are those that are primarily attempted to be influenced with the regulation. The openings in the regulating discs 53a, 53b are advantageous so that the combined area of the air-permeable, free openings is the same in all positions of the regulating discs 53a, 53b, whereby the pressure drop in the air flow over the regulating discs 53a, 53b remains constant.

Fig. 3 shows a cross-section of the spreader shown in fig. 2 and another device for regulating the spreader. In this embodiment, only a round regulating disc 55 is used which is supported via a shaft 41 on a drive motor 40, whereby the regulating disc 55 rotates driven by the motor 40. The inner surface of the lower part of the air channel 51 provides two opposite, vertical regulating pins 54a, 54b and the upper surface of the regulating disk 55 provides an elevation 55a.

When the regulating disc 55 is rotated with the drive motor 40 to a first outermost position, the elevation 55a on the regulating disc is positioned in the middle in front of the first regulating pin 54a on the left in the figure, whereby the regulating disc 55 is tilted in a first direction as shown in the figure. On the left side of the control disc 55 in relation to the drive motor 40, a larger free opening for fresh air L1 is formed compared to the free opening on the right side of the drive motor 40. The left-directed, i.e. in the slope of the control disc 55 directed air flow LA, in the figure is then greater than the right-directed airflow LB in the figure. When the regulating disc 55 is rotated to a second, in relation to the first opposite extreme position, the elevation 54a on the regulating disc 55 positions itself in the middle in front of the right-located regulating pin 54b, whereby the regulating disc is tilted in another, opposite direction. On the left side of the regulating disc 55, a larger free opening for fresh air L1 is formed compared to the free opening on the left side of the regulating disc 55. The right-directed, i.e. in the slope of the regulating disc 55 directed airflow LA, in the figure is then larger than the left-directed airflow LB in the figure. When the regulating disc 55 is set in a position midway between the outermost positions, the left-directed airflow LA in the figure is as large as the right-directed airflow LB in the figure. The regulating disk 55 can be stiffened with a spring so that the regulating disk does not start to swing in the air flow in the intermediate positions. The regulation pins 54a, 54b are regulated in such a way that the combined area of the air-permeable, free openings is the same in all regulation positions.

Fig. 4 shows a cross-section of the spreader shown in fig. 2 and a third device for regulating the spreader. In this embodiment, the regulating means consists of a horizontal, round regulating disk 57 as a supported by an intermediate body 58 on a horizontal regulating rod 56 which extends through the air duct 51. The regulating rod 56 is rotatably supported by the mantle of the air duct 51, and the regulating rod 56 is through the provision of a horizontal shaft 41 connected to a drive motor 40. When the control rod 56 is turned with the drive motor 40, the control disc 57 moves with a rocking motion with the shaft 56's turning motion. When the regulating disc 57 is rotated with the drive motor 40 to a first extreme position where the regulating disc 57 leans from the paper towards the viewer, a larger free opening is formed for a flow LA of fresh air directed from the paper towards the viewer compared to the free opening for a flow LB of fresh air aimed at the paper. When the regulating disk 57 is rotated to a second opposite extreme position in relation to the first extreme position, an opposite situation occurs. When the regulating disc 57 is set in a position midway between the outermost positions, the flow LA of fresh air directed from the paper towards the viewer is as great as the flow LB of fresh air directed towards the paper. The regulating disk 57 is thus poured here in principle in the same way as in the embodiment according to fig. 3.

Fig. 5 shows a cross-section of another spreader placed in connection with the inner ceiling in the area to be ventilated and a fourth device for regulating the spreader. It is a matter of a so-called ventilation beam 50 which includes an elongated, rectangular in cross-section air channel 51, which is directed towards the area 10 to be ventilated, advantageously towards the floor of the area 10 to be ventilated. The end of the air duct 51 which opens towards the area to be ventilated 10 provides control means 60, 61 by means of which the air flow L1+L2 from the air duct 51 is controlled in the direction LA, LB along the inner ceiling in the area to be ventilated out of the spreader 50. The control means 60 , 61 is formed by a triangular-shaped regulating body 60 in cross-section which extends in the longitudinal direction over the entire length of the air duct 51, and against a guide disc 61 which is transverse to the air duct 51, on which the base of the triangular-shaped regulating body 60 rests. The spreader 50 also includes a regulating means 60 in the air channel 51.

Above the air duct 51 there is an elongated, cross-sectionally rectangular fresh air chamber 51a whose bottom wall provides a series of nozzles 51b and whose rear wall provides an entrance opening 51c through which fresh air is blown into the fresh air chamber 51a. The fresh air is directed from the fresh air chamber 51a through the nozzle row 51b into the air duct 51. The side walls of the air duct 51 are formed by rectangular heat exchangers 70a, 70b in cross-section. The flow L1 of fresh air blown into the air duct 51 induces a circulation air flow L2 to flow from the area to be ventilated through the heat exchangers 70a, 70b to the air duct 51, where the fresh air flow L1 and the circulation air flow L2 are mixed together into a united air flow L1+L2, which is controlled in the direction along the inner ceiling to the left LA and to the right LB out into the area to be ventilated. The air channel 51 thus also serves as a mixing chamber. In the heat exchangers 70a, 70b, the circulation air flow L2 can either be heated or cooled. Instead of a series of nozzles 51b in the fresh air chamber 51a, a nozzle slot can be used.

In this embodiment, the regulating means 60 consists of the above-mentioned triangular regulating body 60. The base of the triangular regulating body 60 rests on the transverse control disk 61 in the air channel 51. The regulating body 60 is connected to the maneuvering member 40, whereby the regulating body 60 can be displaced in the transverse direction S1 along the upper surface of the control disk 61 When the regulating body 60 is located in the middle of the air duct 51, as shown in the figure, the outgoing combined air flow L1+L2 from the air duct 51 is distributed evenly in the area to be ventilated to the left LA and to the right LB. When the regulating body 60 is shifted to the right in the figure, a larger part of the outgoing combined air flow L1+L2 from the air channel 51 in the area to be ventilated is directed to the left LA than to the right LB. When the regulating body 60 is displaced to the left in the figure, the situation becomes the opposite, i.e. a larger part of the outgoing combined air flow L1+L2 from the air channel 51 in the area to be ventilated is directed to the right LB than to the left LA. The maneuvering member 40 can consist of, for example, a drive motor and a gear (not shown in the figure) which is connected to this via an axle. The gear wheel on the drive motor can in turn be connected to a fixed rack at the lower surface of the regulating body 60. The driving motor drives the gear wheel which in turn displaces the rack and thus the regulating body 60 in the transverse direction S1 of the air duct 51.

Fig. 6 shows a cross-section of a third spreader placed in connection with the inner ceiling in the area to be ventilated which also adapts the device for regulating the spreader shown in fig. 5. We are talking about a so-called slot spreader 50 which includes an elongated, rectangular in cross-section air channel 51, which is directed towards the area 10 to be ventilated, advantageously towards the floor of the area 10 to be ventilated. The control means 60, 61 which are placed at the lower end of the air duct 51 and the regulating means 60 correspond exactly to the same solution as in fig. 5. The side walls of the air channel 51 here consist of disks 71a, 71b, the lower ends of which provide curvatures that control the air flow L1 to the sides.

Above the air channel 51 there is an elongated, rectangular fresh air chamber 51a whose bottom is completely open or covered with a thin grid and whose side wall is equipped with an entrance opening 51c through which fresh air is blown into the fresh air chamber 51a. The fresh air L1 is directed through the bottom of the fresh air chamber 51a to the air channel 51.

The regulation unit 30 shown in fig. 1 can be made up of a separate control unit 30, but the control unit 30 can also be integrated into the control electronics of the drive motor 40.

Above, only a few advantageous embodiments of the invention have been described, and it is clear to a person skilled in the art that these can be modified in countless ways within the scope of the attached claims.

Claims (8)

PATENT CLAIMS 1. Method for regulating a spreader (50), which spreader (50) is located in connection with the inner ceiling (12) in an area (10) to be ventilated and which spreader (50) includes an air duct (51) that is directed towards the area (10) to be ventilated and control means (52, 60, 61) arranged in connection with the air duct (51), by means of which an air stream (LA, LB) flows out of the air duct (51) in the area (10) which is to be ventilated is controlled in the direction along the inner ceiling (12) out of the spreader (50), characterized in that in the method the temperature is measured on the inner surface of a window (11) in the area (10) to be ventilated with a temperature sensor (20) arranged on the inner surface of the window (11), whose measurement signal is led to a regulation unit (30), and with the regulation unit (30) a maneuvering device (40) is controlled which regulates a regulation means (53a, 53b, 55, 57, 60) mounted in connection with the spreader's (50 ) air duct (51), whereby with the regulating means (53a, 53b, 55, 57, 60) the throw figure at the air flow (LA, LB) flowing out from the air channel (51) in the spreader (50) to the area (10) to be ventilated is regulated to become asymmetrical on the basis of the measured temperature. 2. Method according to claim 1, characterized in that the throw pattern of the air flow (LA, LB) flowing out from the air channel (51) in the spreader (50) to the area (10) to be ventilated is regulated to become asymmetrical in such a way that when the measured temperature on the inner surface of the window (11) is higher than a predetermined set value, a larger part of the outgoing fresh air flow (LA, LB) from the diffuser (50) is regulated in the direction of the window (11) and when the measured temperature is lower than the predetermined target value, a smaller part of the outgoing fresh air flow (LA, LB) from the spreader (50) is regulated in the direction towards the window (11). 3. Method according to claim 1, characterized in that the throw pattern of the air flow (LA, LB) flowing out from the air channel (51) in the spreader (50) to the area (10) to be ventilated is regulated to become asymmetrical in such a way that when the measured temperature on the inner surface of the window (11) is lower than a predetermined desired value, a larger part of the outgoing fresh air flow (LA, LB) from the diffuser (50) is regulated in the direction of the window (11) in a situation where the area (10) which is to be ventilated is empty and there is a need for heating in the area (10) which is to be ventilated. 4. Device for regulating a spreader (50), which spreader (50) is located in connection with the inner ceiling (12) in an area (10) to be ventilated and which spreader (50) includes an air duct (51) which is directed towards the area (10) to be ventilated, in connection with which control means (52, 60, 61) are arranged, by means of which an air stream (LA, LB) flows out of the air duct (51) in the area (10) to is ventilated is controlled in the direction along the inner ceiling (12) out of the spreader (50), characterized in that the device includes a temperature sensor (20) arranged on the inner surface of a window (11) in the area (10) to be ventilated which measures the temperature of the window (11) ) inner surface, a regulating means (53a, 53b, 55, 57, 60) located in connection with the air duct which regulates the throw figure of the air flow (LA, LB) flowing out from the air duct (51) in the spreader to the area (10) to be ventilated, a maneuvering device (40) which controls the regulating means (53a, 53b, 55, 57, 60) and a control unit (30) which controls the maneuvering device (40), to which the measurement signal of the temperature sensor (20) is directed, whereby the throw figure of the air flow (LA, LB) flowing out of the area (10) to be ventilated can be regulated to become asymmetrical against the background temperature which is measured with the temperature sensor (20). 5. Device according to claim 4, characterized in that the regulating means (53a, 53b, 55, 57, 60) includes two horizontal, round regulating disks (53a, 53b) located on top of each other and provided with openings, of which the first regulating disk (53a, 53b) is connected to a drive motor (40) by providing a shaft (41) to rotate in a horizontal plane and the second control disk (53a, 53b) is fixedly supported on the air duct (51), whereby the throw figure of the outgoing air flow (LA , LB) from the air channel (51) to a diffusion unit (52) and further to the area (10) to be ventilated can be regulated to become asymmetrical by changing the mutual position between the first openings in the first regulation disk (53a, 53b) and the other openings in the second regulating disc (53a, 53b) by means of the drive motor (40). 6. Device according to claim 4, characterized in that the regulating means (53a, 53b, 55, 57, 60) includes a circular regulating disc (55) rotating in a horizontal plane, connected to a drive motor (40) through the provision of a shaft (41) , the upper surface of which is provided with an elevation (55a) and two opposite, vertical adjustment pins (54a, 54b) on the inner surface of the lower part of the air duct (51), whereby the adjustment disc (55) can be rotated by means of the drive motor (40 ) between two outermost positions in such a way that the elevation (55a) on the upper surface of the adjustment disc (55) in the first outermost position is positioned in the middle in front of the first adjustment pin (54a, 54b) and rather the adjustment disc (55) in a first direction and the elevation (55a) on the upper surface of the adjustment disc (55) in the second outermost position is positioned in the middle in front of the second adjustment pin (54a, 54b) and rather the adjustment disc (55) in a second, opposite direction, whereby a larger part of the stream end the air flow (L1) from the air duct to a diffusion unit (52) is always controlled in the direction of the slope and a smaller part in the opposite direction, whereby the throw figure of the flowing air flow (LA, LB) in the room area (10) to be ventilated is changed to become asymmetrical. 7. Device according to claim 4, characterized in that the regulating means (53a, 53b, 55, 57, 60) includes a horizontal, round regulating disc (57) which is supported with an intermediate piece (58) on a regulating rod (56) which extends through the air duct (51) and through the provision of a shaft (41) is connected to a drive motor (40) in such a way that the regulating disk (57) can be moved with a rocking movement between two extreme positions, in which the regulating disk (57) is poured into opposite directions by rotating the shaft (41) with the drive motor (40) and thereby the control rod (56), whereby the throw pattern of the outgoing fresh air flow (L1a, L1b) from the roof diffuser (50) to the room area can be regulated to become asymmetrical. 8. Device according to claim 4, characterized in that the regulating means (53a, 53b, 55, 57, 60) includes a triangular regulating body (60), the base of which is movably supported on a transverse guide disc (61) in the air duct (51) located in relation to the air duct in such a way that the regulating body (60) can be displaced with a maneuvering device (40) along the guide disk (61) in the transverse direction (S1) of the air duct (51) between two extreme positions, whereby the throw figure of the outgoing air flow (LA, LB ) from the spreader (50) in the area (10) to be ventilated can be regulated to become asymmetrical.