SE535779C2 - Device with self-acting valve for variable flow throttling - Google Patents

Description

25 30 535 779 walls and windows become larger, only 100 W is used for heating 10 I / s air (presence flow), the remaining 250 W reduces the heat demand from radiators. If heat loads in the room (solar radiation) rise, the flow of 15 degree air increases. (Comfort donation without cooling baffles.) In order to be able to use this method, it is an absolute prerequisite that the supply air diffuser can disperse 15 degree air in a draft-free manner within the entire fl interval.

This is by far the most cost-effective energy saving measure in properties.

For several years now, the applicant has patented ballast with lamella technology, built-in electronics and motor that controls the fate of properties in the above way with very good results.

Two such solutions are described in the Swedish patents SE 520 293 C2 and SE 520 294 C2.

The first solution (SE 520 293 C2) concerns a device with a pipeline and an inlet opening as well as an outlet opening and a throttling member with a throttling surface. The throttling means and the discharge opening are arranged in relation to each other so that the throttling means can be set to different distances from the discharge opening. This can be done either manually or through a drive device. By changing the distance between the throttle member and the discharge end to the pipeline, the air flow through the devices is regulated.

The second solution (SE 520 294 C3) refers to a solution which is somewhat similar to the first, but which introduces two or more lamellae which act as throttling surfaces for the air leaving the discharge end of the pipeline. The smaller the distance between these choke surfaces given a constant air flow through the discharge end, the lower the sound level is achieved in the space where the device is built. suspension means that allow variation of the distance between the slats These slats are also connected to each other by depending on whether the air flow decreases or increases.

However, this solution is relatively expensive for office landscapes, conference rooms, school halls and shopping centers where many donors work together. 10 15 20 25 30 535 779 However, if you need flexible premises where walls are added or changed over time, the applicant's current solution (as described above) is cost-effective. For office rooms, it is always cost-effective.

To reduce the cost of installations, many facilities have been constructed with conventional ballasts that have a common fate regulator that controls the flow to a number of ballasts. The problem with such solutions is that with the supply of sub-temperature air, "cold drafts" will occur which cause drafts if the flow is less than 40-50% of the maximum flow for the specific device. The energy savings will be quite small if you can not reduce the flow to more than 50% (the radiator must heat the excess cold air). If the maximum fate of the device is greater than the maximum flow utilized, the possibility of saving will be even smaller.

There is a device (Flipper) on the market that opens gaps as the flow increases to avoid "colds".

The device is described in the internationally published patent application WO3 / 001124. The installation cost for the device becomes relatively large due to that the duct system becomes quite extensive as each device cannot handle an air flow that is greater than 40 l / s with a low noise level. In addition, an even distribution of the air flow between many devices causes a significant difficulty due to that the devices require a low duct pressure. At low duct pressure and high air velocity in the main duct, the air molecules do not have time to deviate to a sufficient extent into branches to individual devices.

There is thus a need for an energy-efficient device for regulating air flows to different spaces, where such a device is both compatible with existing ventilation systems, art-efficient and capable of regulating large air flows through the ventilation system.

SUMMARY OF THE INVENTION 10 15 20 25 30 535 779 These and other problems are solved by a flow control device according to claim 1.

More particularly, the present invention relates to a variable throttling device comprising a feed end and a discharge end, a first throttling means having a first throttling surface against said discharge end for controlling the flow through said device, the throttling surface being at least equal to the cross-sectional area of the discharge end and the discharge end. where the first throttling means is inclined relative to the discharge end.

The advantage of the solution according to the invention is that the rate of fate out of the device is maintained even at low flows so that it does not occur "cold".

Another advantage of the device according to the invention is that if the temperature of supplied air is 15 degrees C, it rises to 21 degrees C within 1.5 m, then the air is transported from the edge of the device along the roof regardless of the amount of fl. The devices can handle a range 4 range from 4-100 l / s with a sound level of max 27 dB (A).

The outlet velocity of the air is high within the entire flow area so that a strong co-injection of room air occurs which heats outflowing air.

The flow rate is regulated so that a temperature equilibrium is created in the room at the set setpoint for the temperature.

For office landscapes, conference rooms, school halls and shopping centers where many ballasts work together, you can thereby reduce the costs of installation if you have a flow regulator that controls the fate of a number of self-acting ballasts that can disperse 15 degree air in a draft-free manner throughout the flow range. cheap design (without motor, electronics and cable connection).

DESCRIPTION OF THE FIGURES Fig. 1 shows a first embodiment of the present invention in a side view with maximum distance between the ring and the throttling member. Fig. 2 shows the same embodiment as Fig. 1 but in the position where the distance between the ring and the choke member is minimal.

Fig. 3 shows a second embodiment of the present invention in a side view with minimal distance between the ring and the choke member.

Fig. 4 shows the embodiment from Fig. 3 seen from below.

Fig. 5 shows a third embodiment of the invention in a side view. DESCRIPTION OF EMBODIMENTS We would like to draw the reader's attention to the fact that the following description relates to embodiments which are intended to illustrate the function of the invention and not to limit it to these examples only. Ultimately, the invention is limited only by the scope of the appended claims.

Fig. 1 shows a first embodiment of the device 100 according to the present invention. The device 100 consists of a connecting socket 130 (to the box in which the device is located) which is connected to a flat ring 132 in the inner edge of the ring. The idea is that the entire box in which the device is located should be able to be connected to the roof in the space where the device is intended to regulate the air flow.

The connection socket 130 must then be able to be inserted into the outlet intended for ventilation in the ceiling. However, it is quite possible to connect the device 100 to a permanent ventilation hole in the ceiling without the socket 130.

Below the spigot 130 with the ring 132 is a disc-shaped throttling member 136 with a throttling surface 135 at least equal to the cross-sectional area 150 of the connecting spigot 130. In the embodiment illustrated in the figure, the throttling surface 135 of the throttling member 136 is equal to 130 cross-sectional area 150. Although the throttling surface 135 may be larger or smaller, it is normally larger than the cross-sectional area 150 of the connecting socket 130.

The advantage of such a size of the choke surface 135 is that a large flow area is created for the air flow passing through the nozzle 130 and the choke surface 135 and a large air gap between the two, which enables higher air flows if needed.

The throttle member 134 is suspended and connected via a lever 112 with weight 110.

The lever 112 is suspended in a bracket (not shown) and may be arranged above (Fig. 1) or below (Fig. 3) the throttle member 136. It should be mentioned that the device 100 in Fig. 1 is shown only with such a lever 112 and weight 110 However, the throttle member 136 may be coupled to the levers and weights shown in Fig. 4 below. The throttle member 136, which in Fig. 1 is disc-shaped, can have any shape. For example, it may have a rectangular shape. The choke surface 135 may be smooth, flat or curved.

The weight 110 may be fixed or movable. The purpose of a movable weight 110 is to be able to adjust the sensitivity of the throttle member 136 to changes in air flows through the device via adjustment of the torque of the lever 112. Advantageously, the torque can be adjusted by the weight 110 being movably mounted on a slide rail 116. If the weight 110 is moved closer to the suspension point on the lever 112, the throttle member 136 becomes more sensitive to variations in air flow through the discharge end 122 of the socket 130 due to the lower torque.

Similarly, the throttle member 136 becomes more insensitive to changes in airflow through the discharge end 122 of the spout 130 the longer the weight 112 fl is shifted away from the suspension point 112 of the lever 112 due to the higher torque.

Between the ring 132 and the throttling member 136 there is an intermediate ring 134 which is also suspended in the lever 114 but at a distance to the lower surface of the flat ring 132 which is shorter than the distance between the throttling surface 135 and the lower surface of the flat ring 132. This means that the intermediate ring 134 will always be located between the flat ring 132 and the disc 136.

The intermediate ring 132 also acts as a second restrictor for the flow through the discharge end 122 of the valve 100, where the restriction of the flow takes place along the restrictor surface 133 of the intermediate ring 133 and the spaces between the planar ring 132 and the intermediate ring 134 and the intermediate ring 134 and the restrictor 136.

By placing an intermediate ring between the throttle member 136 and the planar ring 132, the sound level is significantly reduced. The sound level increases by 1 dB (A) 1 m below the device at 100 l / s in relation to the background level. Without the intermediate ring 134, the sound level increases by 2.5 dB (A) even though the aperture is increased by about 50%, which means that the air speed (throw length) is reduced. The applicant currently has no good theoretical explanation for why the intermediate ring 134 reduces the sound level, but notes that all experimental experiments show that the enamel technique, ie. an intermediate ring 135 and a throttle member 136 defining a horizontal air gap function well.

However, it should be mentioned in this context that the winding works even without the intermediate ring 134, but then with a higher sound level and shorter throw length.

The means 100 further comprises a limiting means in the form of a lower plate 138 which is connected to the ring 132 via a number of suspension means 140.

The restrictor 138 provides protection and stability for moving parts and limits the range of motion of the throttle member 136.

The air flow through the feed end 120, the socket 130 and the discharge end 122 presses down the disc 136, which creates a balanced air pressure which drives the air along the ceiling in a room at a good speed. The air pressure is adjustable with the weights 110 as described above. The Nlan can adjust the weights 110 so that the device is minimally open at zero flow or at very low flows (say 4 l / s) through the discharge end 122 and maximally open at large flows (say in the vicinity of 100 l / s). After setting, the device responds passively to changes in the flow through the discharge end 122, i.e. the device is self-acting.

The large throttling surface 135 of the choke member 136 and the almost negligible frictional forces on the lever 112 cause the air velocity to become almost constant throughout the flow range. This flow range can be defined as flows in the range 4-100 l / s. This solution meets the requirements for very low noise levels at large flows - something that the applicant does not consider to be achieved with devices available on the market. 10 15 20 25 30 535 779 In addition, the flow in a certain direction can be limited to avoid "flow collisions" with other devices so that no draft occurs. By placing one or more spacers 142 on the lower plate 138, the throttle member 136 is prevented from opening more than the spacer allows. The choke member 136 may be inclined with respect to its rest position in which it is parallel to the cross-sectional area 150 of the socket 130. When one or more spacers 142 are then placed as shown in Fig. the side where no spacers are placed, as the flow will mainly pass there.

The advantage of the spacers is that they can be arranged in a simple manner even after the valve 100 has been mounted in the ceiling of the space to be ventilated.

Fig. 1 shows the situation where the device 100 is in a position somewhere between closed and completely open. In this mode, about 100 lls are obtained. The remaining distance is used to be able to "look" the choke member 136 without increasing the sound level.

F lg. 2 shows the same device 100 in the almost closed position. One can define a closed position of the device 100 when the air flow through the discharge end 122 of the socket 130 is zero or very low. Then the device 100 can be adjusted so that the vertical distance between the choke member 136 and the ring 132 is zero in the case where the intermediate ring 134 is not used. distance is equal to the thickness of the intermediate ring 134.

In the same way, a fully open position of the device 100 can be defined when the air flow through the discharge end 122 of the socket 130 is maximum. Then the distance between the restrictor 136 and the restrictor 138 is equal to zero.

Fig. 3 shows a second embodiment of the device 100 when the weight 110 is placed below the distance 138. The device is protected by a cover 160 which also has an aesthetic function to hide the weight 110. As can be seen from Figs. The device is in a position close to the closed device position as defined above.

The advantage of this embodiment is that the sensitivity of the throttling member 136 to varying air currents through the discharge end 122 of the socket 130 can be easily adjusted without the entire device 100 having to be dismantled from the ceiling.

The embodiment in Fig. 1 could then be used in cases where only an adjustment of the sensitivity of the restrictor 136 is needed or where this adjustment does not need to be made very often.

Fig. 4 shows the embodiment from Fig. 3 seen from below.

The figure shows four weights 110, 160, 170 and 180 and four pairs of levers 112, 114; 162, 164, 172, 174 and 182, 184 of each weight. The weights can be fixed or movably arranged on each rail in the same way as described earlier in Fig. 1. The weights 11, 160, 170 and 180 have the same function as described earlier in Fig. 1 - namely to set the torque of the corresponding lever and thereby influence the sensitivity of the restrictor 136 to changes in the flow through the discharge end 122 of the device 100. Furthermore, the weights and the levers may be arranged on the top of the restrictor 136 (shown in Fig. 1) or below it (see Fig. 3). The invention is not limited to any particular geometric shape of the device 100 and other shapes of the throttle member 136, the intermediate ring 134 and the flat ring 132 are conceivable other than the annular or circular one only. They could be square, triangular, trapezoidal or have the shape of an n-corner.

Fig. 5 shows a third embodiment of the invention where the device 200 is mounted against a side wall 230 and where the flow out of the device 200 takes place through the side wall to the space to be ventilated.

The difference with this embodiment is that it is adapted for mounting in side walls, as is sometimes the case with ventilation devices in some European countries. The figure shows a connection duct 220 whereby the device 200 is connected to the rest of the ventilation system (not shown). Further, the device 200 comprises a choke 236 and an intermediate ring 234 which is very similar to the choke 535-79 and the intermediate rings shown in Figures 1-4. While the choke 236 and the intermediate ring are connected to weights 282 and 262 via respective levers 284 and 264, the flow takes place out of the device in only one direction, i.e. in the direction indicated by the arrows in Fig. 5 through the opening in the side wall 230. It should be mentioned that the device 200 is advantageously installed near the ceiling to the space to be ventilated by the device 200 in the manner shown in the figure. basically identical to the device 100 shown in the previous fi gures and will not be explained further ..

Claims (15)

1. 0 15 20 25 30 535 779 11 PATENT REQUIREMENTS A self-acting valve (100) for variable throttling of fl fates comprising a feed end (120) and a discharge end (122), a first throttling means (136) having a first throttling surface (135) against said discharge end (122) for control of the fate by said means, wherein the throttling surface (135) is at least equal to the cross-sectional area (150) of the discharge end and where the first throttling member (136) is suspended via your levers (112, 162, 172, 182) whereby the first throttling member (136) ) is vertically movably arranged relative to the discharge end (122) so that the distance between the first throttling member (136) and the discharge end (122) increases as the ökar fate increases and is inclined relative to the discharge end (122). . The device of claim 1, further comprising fl your actuators for variable adjustment of the inertia of the movement of the throttle member (136) caused by the genom through the discharge end (122). . The device of claim 2, wherein each said actuator comprises at least one weight (110, 160, 170, 180) for adjusting the center of gravity of the actuator. . A device according to claim 2 or 3, wherein each said actuator comprises a rail (116) and wherein the weight (110, 160, 170, 180) is movably mounted on the rail (116). A device according to any one of claims 1-4, further comprising a second restrictor (134) between the discharge end (122) and the first restrictor (136), the second restrictor (134) being movably disposed relative to the discharge end (122) and the first throttling member (136) and includes a second throttling surface (133) that is smaller than the first throttling surface (135) of the first throttling member (136). 10 15 20 25 30 535 779 12 The device of claim 5, wherein the second throttling surface (133) is annular. A device according to any one of claims 2-6, wherein the first throttling means (136) is connected to your actuators via said several levers (112, 162, 172, 182). A device according to any one of claims 5-7, wherein the second choke means (136) is connected to fl your actuators via fl your levers (114, 164, 174, 184). A device according to any one of claims 2-8, wherein said actuators are arranged below the first throttling means (136). Device according to any one of claims 7-9, wherein each lever (112, 162, 172, 182, 114, 164, 174, 184) is adjustable via the weight (110, 160, 170, 180). A device according to any one of claims 2-8 and 10, wherein said actuators are arranged above the first throttling member (136). A device according to any one of claims 5-11, wherein the device (100) is arranged to be in a closed position at a certain minimum flow through the discharge end (122), where the distance between the first (136) and the second throttling means (134) is minimal. A device according to claim 12, wherein the device (100) is arranged to operate in an open position when the fate through the discharge end (122) is greater than the minimum flow. A device according to any one of claims 1-13, further comprising a limiting means (138) adapted to define the maximum distance between the first throttling means (136) and the discharge end (122). 535 779 13 The claim 14, further comprising at least one distance (142) disposed between the restrictor (138) and the restrictor (136) for restricting the flow between the discharge end (122) and the restrictor (136) in a predetermined direction.