RU218993U1 - AIR SUPPLY AND RECIRCULATION DAMPER - Google Patents

Abstract

The utility model relates to components of supply and recirculation installations that provide fresh air supply to the room and recirculation of room air. The damper includes a housing and a filter placed on it. At the same time, the filter housing is made with an open end and frame forming elements. The filter element is held in the filter housing from the side of the outer surface of the filter element by means of frame forming elements, and from the side of the inner surface - by the edge of the damper housing. The technical result is to ensure the reliability of the structure. 9 w.p. f-ly, 9 ill.

Description

Technical field

The utility model relates to components of both indoor supply and recirculation units and supply and recirculation units, which are parts of ventilation systems that supply fresh air to the room and recirculate room air.

State of the art

Dampers are widely used in air handling units of any application to control the air supply. So, they are equipped, in particular, with openings for intake of fresh air and openings for intake of recirculated air. Thus, the use of dampers allows you to stop the supply of one of the air flows or block both flows if necessary. Filters in air handling units are used to purify the air supplied and returned to the room.

Combining the damper and filter into one design allows to increase the area of the filter element of the volumetric filter, as well as to make the damper and filter more compact and able to occupy a smaller volume both in the air ducts of ventilation systems and in air handling units. However, often such a combination does not have sufficient tightness compared to the separate use of dampers and filters, as well as sufficient fastening reliability, i.e. connection rigidity.

The technical solution disclosed in patent No. RU2572989C2 (published: 01/20/2016; IPC: B01D 27/08; B01D 35/30) is known from the prior art. The invention is intended for filtering in particular liquid fluids, in particular fuel or oil, in particular an internal combustion engine. The filter includes a filter bowl, in which the filter element is located, and a filter head, which has an inlet and/or outlet for the fluid. The filter head and filter bowl are connected to each other by means of a detachable bayonet-type swivel-plug connection. The swivel-plug connection has at least two fixing structural elements interacting with each other, one of which is connected to the filter bowl and one to the filter head. One of the locking structural elements contains at least one locking ledge. One of the locking structural elements contains at least one recess interacting with the locking protrusion with an input/output zone for joining and separating the locking protrusion and the recess without resistance, and with a closing zone in which the locking protrusion is engaged like a bayonet connection. In order to prestress the fixing lug, a prestressing element acting between the head and the filter bowl is provided in the recess. The recess between the closure area and the input/output area has a locking ledge for the locking ledge, which has a ledge top on its side cooperating with the locking ledge. The locking lug has a locking apex on its side interacting with the locking ledge. EFFECT: providing a simple, reliable and secure connection.

The disadvantage of analog is that the technical solution mentions the possibility of installing a throttle valve on the filter head, but the valve and the filter are not connected by means of a swivel-plug connection. In the absence of a swivel-insert connection between the valve through which the flow enters and the cylindrical filter housing, as well as a hermetic fixation, gaps between the valve and the filter are possible, which makes it impossible to guarantee a high degree of flow purification.

In addition, a supply ventilation valve is known according to patent No. RU178462U1 (published on 04/04/2018; IPC: F24F 7/00; F24F 13/08). The supply ventilation damper contains an air duct made of a heat and sound insulating material, with a housing located at one of its ends with an air flow regulator coaxially mounted on its outer side with the possibility of rotation, made with a window on the side surface, while the housing is made with slots placed on the sides and a channel - an air duct from the inside with the possibility of its alignment with the regulator window when the regulator is turned to control the amount of air flow.

In the analogue, a cylindrical cup (flange) is also attached to the valve, inside of which there is an additional grille. However, it is not specified that the shape of the lattice follows the shape of the glass. Also, the grating can be an analogue of a prefilter, but not of any filter. Moreover, the flange is made with a completely closed side surface, which reduces the cleaning area and increases the pressure drop across this element along the air flow. Also, from the analogue, the method of fastening from the flank to the damper remains unclear. In addition, the analog does not use a throttle-valve damper.

The essence of the utility model

The object of the present utility model is to provide a damper with a filter that improves the reliability of both the damper and the filter.

This problem is solved by the claimed utility model by achieving such a technical result as increasing the reliability of both the damper and the filter by increasing the tightness of the space limited by the damper and the filter housing, as well as increasing the duration of the filter. The claimed technical result is achieved including, but not limited to, due to:

fixing the filter housing in the damper by means of a swivel-plug connection;

placement of the filter element over the entire surface of the filter housing;

fixing the filter element inside the filter housing using frame forming elements, as well as the edges of the damper housing.

More fully, the technical result is achieved by a damper, including a housing and a filter placed on it. At the same time, the filter housing is made with an open end and frame forming elements. The filter element is held in the filter housing from the side of the outer surface of the filter element by means of frame forming elements, and from the side of the inner surface - by the edge of the damper housing.

The damper is necessary to regulate the air flow entering the device or system in which the present utility model is used, and the filter, in turn, is necessary to clean this air flow. Moreover, the described connection of the damper and the filter provides an increase in the tightness of the structure, as well as its reliability. Holding the filter element allows not only to firmly fix it inside, but also to avoid the formation of air gaps.

The filter housing and the damper housing can be made cylindrical.

The damper housing may include at least two grooves, and the filter housing may include at least two protruding elements. Moreover, the protruding elements can be located on the edge of the filter housing, and the grooves can be made on the edge of the damper housing. In this case, at least two grooves can be located equidistantly on the edge of the damper body. The filter housing can be fixed in the damper housing by means of a swivel and plug connection. Such a connection allows you to further increase both the tightness and reliability of the structure.

The filter element can follow the shape of the filter housing and cover the entire inner surface of the filter housing. This will increase the total air cleaning area and create a lower pressure drop across the filter.

In this case, the filter element can be made of nylon mesh.

The damper and the damper body may form a throttle valve.

The filter housing may include at least four frame forming elements to prevent the filter element from falling out under the influence of air flow.

Description of drawings

The object of claims in this application is described point by point and clearly stated in the claims of the utility model. The objects, features and advantages of the utility model mentioned above are apparent from the following detailed description, in conjunction with the accompanying drawings, which show:

In FIG. 1 is a schematic isometric view of a filter damper according to the present utility model.

In FIG. 2 is a schematic sectional view of a filter damper according to the present utility model (side view).

In FIG. 3 is a schematic isometric view of the damper with additional elements according to the present utility model.

In FIG. 4 is a schematic isometric view of a filter with additional elements according to the present utility model.

In FIG. 5 is a schematic isometric view of a filter damper with additional elements of the present utility model.

In FIG. 6 shows a schematic isometric view of the filter with additional elements in another embodiment of the present utility model.

In FIG. 7 is a schematic isometric view of a filter damper in another embodiment of the present utility model.

In FIG. 8 is a schematic isometric view of a filter damper in another embodiment of the present utility model.

In FIG. 9 is a schematic view of the filter flap shown in FIG. 8, in a section according to the present utility model (side view).

These figures are explained by the following positions:

Position 1 - damper;

Position 11 - damper body;

Position 111 - edge of the damper body;

Position 1111 - ledge latch;

Position 1112 - latch-latch;

Position 12 - groove;

Position 2 - filter;

Position 21 - filter housing;

Position 22 - frame forming elements;

Position 23 - filter element;

Position 24 - protruding element.

Detailed description of the utility model

In the following detailed description of the implementation of the utility model, numerous implementation details are provided to provide a clear understanding of the present utility model. However, it will be obvious to one skilled in the art how the present utility model can be used, both with and without these implementation details. In other cases, well-known methods, procedures, and components are not described in detail so as not to unnecessarily obscure the features of the present utility model.

Furthermore, it is clear from the foregoing that the utility model is not limited to the present implementation. Numerous possible modifications, changes, variations and replacements of non-essential features of the utility model that retain the essence and form of this utility model are obvious to those skilled in the subject area.

The term "damper" used in the description of the technical solution means the entire structure of the damper, often used independently of filters, i.e. this term refers to the combination of a closing/opening damper element and a damper body. "Filter" also refers to the whole structure, namely the filter housing and the filter element inserted into it. The “filter element” is the main component of the filter that directly traps air pollutant particles.

In FIG. 1 and 2 show a schematic view of the damper 1 with the filter 2 in isometric view and in side section, respectively, according to the present utility model. The damper 1 includes a housing 11 and a filter 2 placed on it. At the same time, the filter housing 21 is made with an open end and frame forming elements 22. The filter element 23 is held in the filter housing 21 from the side of the outer surface of the filter element 23 using frame forming elements 22, and from the side of the inner surface - by the edge of the damper body 111. In Fig. 2 it can be seen that the placement of the filter 2 on the damper body 11 means "putting on" the filter 2 on the body 11. In other words, the damper body 11 is inserted into the filter 2 so that their edges overlap each other. In this case, the edge of the filter element 23 becomes clamped on both sides by the edge of the filter housing and the edge of the damper housing 111, respectively, and the main part of the filter element 23 is held from the side of the outer surface of the filter element 23 by means of frame forming elements 22 of the filter housing 21.

Moreover, the described connection of the damper 1 and the filter 2 provides an increase in the tightness of the structure, as well as its reliability. Holding the filter element 23 allows not only to firmly fix it inside, but also to avoid the formation of air gaps.

Damper 1 is necessary to regulate the air flow of the incoming device or system in which the present utility model is used. It can be in both closed and open position. When the damper 1 is closed, the air will not enter the device equipped with the real damper 1, and, as a result, will not pass through the filter 2. In the open position, the air flow passing through the hole equipped with the damper 1 will be cleaned on the next by air flow filter 2.

Various types of dampers 1 can be used, including round or rectangular (including square) cross sections. Important is the presence of the damper body 11, on which it is possible to place the filter 2. In particular, the damper 1 of the throttle-valve type shown in all Figures of the present utility model can be used. However, possible implementation options are not limited to the use of a throttle valve.

Within the framework of this utility model, filters 2 of any class can be used. However, it is preferable to use filters of classes below high efficiency filters. This is, firstly, due to the fact that a higher pressure drop is formed on high-efficiency filters, and due to the close location of the filter element 23 and damper 1, in the framework of this utility model, a high pressure drop across filter 2 can lead to malfunctions of the damper. 1, because it will be more difficult to open and close, i.e. be regulated. Secondly, because such dampers are often fitted with air intake openings, it is preferable to first clean the incoming air stream from larger contaminants, such as dust and small debris. Thus, it is possible to avoid significant clogging of the internal components of a device equipped with a real damper 1 with a filter 2.

The filter element 23 of the filter 2 can follow the shape of the filter body 21 and cover the entire inner surface of the filter body 21. Thus, the total air cleaning area increases and a lower pressure drop across the filter 2 is created. The lower pressure drop is due to the fact that during the manufacture of the filter element 23 in the form of a filter housing 21, openings of considerable size are made in the filter housing 21, i. e. frame forming elements 22 of the housing 21 occupy a smaller part of the area of the housing 21 than the holes (gaps). And the gaps are just filled with the filter material 23, which, in the case of using a filter material of class 23 below high efficiency, does not make a significant contribution to the pressure drop.

So, as the filter element 23 can be used materials that carry out rough air purification (classes G1-G4, or EU1-EU4). In particular, a nylon mesh can be used as such. In this case, filter 2 will be a pre-filter, cleaning the air from fluff, soot, coarse dust particles, insects, feathers, large plant seeds.

Also, as a filter element 23, materials that perform fine air purification (classes F5-F9, or EU5-EU9) can be used. In this case, at the stage of primary cleaning, not only the previously listed pollutants will be deposited on the filter element 23, but also other particles larger than 1 micrometer, for example, medium and fine dust, fluff, medium and fine plant pollen, fungal/mold spores, bacteria.

For the most reliable fixation of the filter 2 on the body of the damper 11, it is also preferable to provide the damper 1 and/or the filter 2 with appropriate structural details. Mounting methods may differ depending on the design of a particular damper 1 with filter 2.

In particular, in FIG. 3 shows a schematic isometric view of the damper 1 with additional fasteners according to the present utility model. Thus, if the damper 1 is cylindrical, it includes a damper body 11, on the edge 111 of which at least two grooves 12 can be made. In this case, the filter 2, or rather its body 21, must also be made with additional fixing elements. For example, as shown in FIG. 4, the edge of the filter housing 21 may be provided with protruding members 24 as such. To connect the damper 1 shown in Fig. 3 and filter 2 shown in FIG. 4, it is important that the protrusions 24 and the slots 12 are equally placed on the filter housing 21 and the edge of the damper housing 111, respectively.

By “equal placement” it is meant that if the grooves 12 in the edge of the damper body 111 are made in such a way that in the cross section of the damper 1, when radial coordinate axes are superimposed on it with the origin in the center, the first groove 12 corresponds to the angle α, and the second 12 corresponds to the angle β, then in the cross section of the filter 2, when the radial coordinate axes are superimposed, the protruding elements 24 in a similar way will correspond to the same angles (α and β) (we consider the radius to be the same for all elements). That is to say, it is also important that the number of slots 12 and projections 24 be equal.

где n - количество пазов 12. То же самое касается и выступающих элементов 24. Это увеличит герметичность конструкции ввиду того, что такое размещение не будет допускать слишком большого расстояния между крепежными элементами. Так, например, если используется всего два паза 12 и два выступающих элемента 24, меньший угол между которыми равен 15°, а больший 345°соответственно, при условии, что угол в 345° будет расположен выше угла в 15°, под действием силы тяжести фильтра может образовываться значительный воздушный зазор. Также, при аналогичных обстоятельствах это скажется и на прочности соединения, которая также снизится. По той же причине не рекомендуется крепить фильтр 2 к корпусу заслонки 11 при помощи лишь одного паза 12 и одного выступающего элемента 24.To increase the tightness, it is preferable that the grooves 12 and the protruding elements 24 be placed equidistant, as shown in FIG. 3. That is, in the radial coordinate system, the angle between each adjacent groove 12 was equal to

where n is the number of slots 12. The same applies to the protruding elements 24. This will increase the tightness of the structure in that such an arrangement will not allow too much distance between the fasteners. So, for example, if only two grooves 12 and two protruding elements 24 are used, the smaller angle between which is 15°, and the larger 345°, respectively, provided that the angle of 345° is located above the angle of 15°, under the action of gravity filter, a significant air gap can form. Also, under similar circumstances, this will also affect the strength of the connection, which will also decrease. For the same reason, it is not recommended to fasten the filter 2 to the damper body 11 using only one groove 12 and one protruding element 24.

In this case, it is preferable to make grooves 12 of a more complex shape, for example, L-shaped, as shown in Fig. 3. In this case, it is possible to fix the filter 2 on the damper body 1 by means of a swivel-insert (bayonet) connection, as shown in FIG. 5. The damper 1 includes a housing 11 and a filter 2 placed on it. In this case, the filter housing 21 is made with an open end and frame forming elements 22. The filter element 23 is held in the filter housing 21 from the outer surface of the filter element 23 by means of the frame forming elements 22 , and from the side of the inner surface - by the edge of the damper body 111. At the same time, at least two grooves 12 are made on the edge of the damper body 111, and at least two protruding elements 24 are made on the edge of the filter housing 21. Moreover, the protruding elements 24 are inserted into the grooves 12, and the filter 2 is rotated in such a way that it is fixed on the damper body 11 by means of a swivel and plug connection. It can also increase the strength of the fixation. In particular, an increase in the strength of the connection will become noticeable when the damper 1 with the filter 2 is used in conditions of high air flow. In this case, on the filter 2, namely on the filter element 23, a greater pressure drop will be created, due to which the filter 2 can detach from the damper 1. L-shaped grooves 12 reduce the likelihood of such a breakdown. It is important to note that both the grooves 12 and the protruding elements 24 can be more than two. An increase in their number also increases the strength of the connection, however, it is preferable that the total length of the edge of the damper body 111 with grooves 12 (that is, the total length of the gaps forming the grooves in the cross section) does not exceed 50% of the total perimeter of the edge of the damper body 111 in cross section, otherwise the integrity of the edge 111 will be significantly reduced, namely, the rigidity will be reduced, which may also lead to breakage.

Fastening with glue or screws is undesirable due to the fact that if it is necessary to replace the filter element 23 (for example, if it is clogged), it will be difficult to dismantle the structure. Moreover, if you try to remove the adhesive, the filter housing 21 may break, which will require its replacement.

In FIG. 6 shows a schematic view of the filter 2 in an isometric view with additional elements in another embodiment of the present utility model. As can be seen from FIG. 6, the filter housing 21 is made in the form of a cylinder with one open end, and six frame forming elements 22 are made in its side surface. Also, three intersecting frame forming elements 22 are made on the closed end. Such an arrangement and execution of the frame forming elements 22 is optimal for a cylindrical the shape of the filter housing 21, because provides a sufficiently reliable hold of the filter element 23 in the housing 21, but does not make a significant contribution to the pressure drop on the side surface and the closed end of the housing 21. 21 and the area of the closed end of the housing 21. Otherwise, the contribution to the pressure drop will become more significant, as a result of which both the air performance of the device including such a damper 1 with a filter 2 and the noise level produced by it will decrease. Sufficient to hold the filter element 23 in most cases is the presence of four frame forming elements 22 in the side surface of the filter housing 21 (with a cylindrical shape of the side surface) and one frame forming element 22 in the closed end of the filter housing 21. Otherwise, when using a soft ( easily deformable) material for the filter element 23 and the absence of additional reliable fixation to the filter housing 21, the filter element 23 may fall out of the housing 21 when the air flow passes through it. It is important to note that, like the slots 12 and the protrusions 24, the frame molds 22 are also preferably placed equidistant.

In FIG. 7 shows a schematic isometric view of the damper 1 with filter 2 in another embodiment of the present utility model. As can be seen from FIG. 7, in this embodiment, only the shape of the filter body 21 and the shape of the filter element 22 are changed. Thus, it is possible to use a filter 2, the body 21 of which is made with a cylindrical side surface and a hemispherical (or other semi-ellipsoidal) closed end. In this case, it is also possible to fix the filter 2 on the damper body 11 by means of a swivel and plug connection. It is also important to note that all the additional details described for the cylindrical filter housing 21 apply in this case as well.

In FIG. 8 shows a schematic isometric view of the damper 1 with filter 2 in another embodiment of the present utility model. This figure shows an embodiment of the damper 1 with a filter 2 with a rectangular (including square) cross section. It is obvious that the rotary-insert connection is not applicable in this embodiment, however, in order to increase the reliability of fixation, a latch-latch 1111 and a latch-latch 1112 can be made in the edge of the damper body 111. Then, when inserted, the edge of the filter housing 21 becomes clamped on both sides by these protrusions (1111, 1112) as shown in FIG. 9, as a result of which the filter 2 is securely fixed to the damper body 11. In general, a similar "plug-in" connection method is also applicable in the case when the filter body 21 has a cylindrical side surface.

When using the filter housing 21 in the form of a rectangular parallelepiped, as shown in FIG. 8, it suffices that at least two walls of the damper body 11 include projections (1111, 1112) on their edge 111 for secure fixation. Moreover, the protrusions can be smaller in length than the edge of the corresponding wall. Preferably, they are at least 20% of the length of the edge of the wall on which they are located.

It is also important to note that for the formation of the filter housing 21 in the form of a rectangular parallelepiped, four frame forming elements 22 are necessary in the ribs of the side surface of the parallelepiped, as well as four more frame forming elements 22 in the side faces (preferably in the center) to avoid the filter element 23 falling out. from the body 21. At the closed end, in turn, as in the case of the cylindrical body 21, one frame forming element 22 is sufficient.

Skeleton molds 22 corresponding to the "frames" of the ends, which are clearly visible in FIG. 1, 5, 7 and 8, however, their necessity is obvious to a person skilled in the art.

The present application materials provide a preferred disclosure of the implementation of the claimed technical solution, which should not be used as limiting other, private embodiments of its implementation, which do not go beyond the scope of the requested legal protection and are obvious to specialists in the relevant field of technology.

Claims (10)

1. The damper of the supply and recirculation unit, including a housing and a filter placed on it, while the filter housing is made with an open end and frame forming elements, while the filter element is held in the filter housing from the side of the outer surface of the filter element using frame forming elements, and from the side of the inner surface - the edge of the damper body. 2. The damper according to claim 1, characterized in that the filter housing and the damper housing are made cylindrical. 3. The damper according to claim 1, characterized in that the damper housing includes at least two grooves, and the filter housing includes at least two protruding elements. 4. The damper according to claim 3, characterized in that the protruding elements are located on the edge of the filter housing, and the grooves are made on the edge of the damper housing. 5. The damper according to paragraphs. 2 and 4, characterized in that the filter housing is fixed in the damper housing by means of a swivel-insert connection. 6. The damper according to claim. 4, characterized in that at least two grooves are located on the edge of the damper body equidistantly. 7. The damper according to claim 1, characterized in that the filter element repeats the shape of the filter housing and covers the entire inner surface of the filter housing. 8. The damper according to claim. 1, characterized in that the filter element is made of nylon mesh. 9. The damper according to claim 1, characterized in that the damper and the damper body form a throttle valve. 10. The damper according to claim. 1, characterized in that the filter housing includes at least four frame forming elements.

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