CN221062032U - Dust removing device - Google Patents

Abstract

The application provides a dust removing device, which relates to the field of dust prevention technology, and comprises a frame and a plurality of filter components; the filter assembly comprises filter bags, and each filter bag is connected with the frame; the frame is used for being installed on an indoor wall body, a plurality of ventilation openings are formed in the frame, the filter bag is provided with a collection opening and an ash discharge opening, and the ventilation openings are communicated with the collection openings in a one-to-one correspondence manner, so that the filter bag filters dust and impurities in air blown into the indoor through the collection openings; the dust collector can be cleaned by conveniently opening the dust discharging port indoors, and the problem that the dust screen is inconvenient to assemble, disassemble and clean by the staff is solved.

Description

Dust removing device

Technical Field

The application relates to an indoor dustproof technology, in particular to a dust removing device.

Background

The dustproof net is a simple, practical and economical protective measure, and is mainly used for preventing outdoor dust and sundries from entering a room, keeping indoor air clean, and has wide application range, so that equipment, buildings and environments can be protected, and the working and life quality of people can be improved.

In the related art, a dust screen is equipped in a building and is usually connected with a wall body by using a screw or a bolt, and after a period of use, the dust screen needs to be cleaned to prevent the dust screen from being blocked and keep the normal working state of the dust screen, the existing dust screen cleaning mode is to unscrew the screw or the bolt, then detach the dust screen for cleaning, and reinstall the dust screen by the screw or the bolt after cleaning.

However, the dust screen is usually disposed in a relatively narrow hole, and a worker needs to detach the dust screen from the wall body when cleaning the dust screen, so that the dust screen cleaning operation is inconvenient.

Disclosure of utility model

In view of the above, the application provides a dust removing device, which aims to solve the problem that a worker is inconvenient to disassemble, assemble and clean a dust screen.

In order to achieve the above purpose, the application provides a dust removing device, which adopts the following technical scheme:

the application provides a dust removing device, which is used for being installed on an indoor wall body and comprises: a frame and a plurality of filter assemblies, the filter assemblies comprising filter bags, each filter bag being connected to the frame; the frame is used for being installed on the indoor wall body, a plurality of ventilation openings are formed in the frame, the filter bags are provided with collecting openings and ash discharging openings, and the ventilation openings are communicated with the collecting openings in a one-to-one correspondence mode, so that the filter bags filter dust and impurities in air blown into the indoor through the collecting openings;

the filter bag is configured to collect the dust and foreign matter and to discharge the dust and foreign matter through the dust discharge port.

Through adopting the technical scheme, when a worker uses the dust removing device, the frame is fixedly arranged on the indoor wall, outdoor air enters the collecting port in the filter bag through the vent on the frame and then is blown to the filter bag, and the filter bag can filter dust and impurities in the air and enable the dust and impurities in the air to be attached to the filter bag or fall to the dust discharging port; when the dust removing device is used for a period of time, a worker is required to clean the dust removing device, the worker only needs to open the dust discharging port indoors and flap the filter bag, so that dust and impurities in the filter bag can be discharged, and then the dust discharging port is closed again; the whole dust collector is not required to be detached from the lower wall body by a worker, the convenient effect that the frame is not required to be detached can be achieved by one-time installation, and then the dust collector is convenient and quick to clean, and labor time of a large number of workers is saved.

In one possible implementation, the filter bag comprises a filter portion comprising a fixed plate, a first filter cloth, a second filter cloth, and a third filter cloth; the first filter cloth, the second filter cloth and the third filter cloth are sequentially connected and the same end is connected with the fixing plate, the other ends of the first filter cloth, the second filter cloth and the third filter cloth form an ash discharge port, and the fixing plate, the first filter cloth and the third filter cloth are connected with the inner side wall of the ventilation opening.

Here, first filter cloth, second filter cloth and third filter cloth enclose jointly and establish the effect region of filtering dust and impurity in the air of filter bag to first filter cloth, second filter cloth and third filter cloth are connected with the fixed plate simultaneously, and it is understood that the fixed plate has certain hardness and intensity, can support first filter cloth, second filter cloth and third filter cloth, is difficult for making first filter cloth, second filter cloth and third filter cloth because external wind-force is too big leads to deformation influence filter effect.

In one possible implementation manner, the first filter cloth and the third filter cloth are symmetrically arranged at two sides of the fixing plate, and the projection width of the second filter cloth on the frame is smaller than the width of the ventilation opening.

Here, it can be understood that the air blown from the vent of the frame to the first, second and third filter cloths may first contact the first, second and third filter cloths, the first and third filter cloths are symmetrically disposed on both sides of the second filter cloth, and the projected width of the second filter cloth on the frame is smaller than the width of the vent, so that the tensile forces from the first and third filter cloths to which the second filter cloth is subjected are uniform, and the second filter cloth is not deflected due to uneven tensile forces.

In addition, the contact area between the air blown to the first filter cloth, the second filter cloth and the third filter cloth from the ventilation opening of the frame and the first filter cloth, the second filter cloth and the third filter cloth is increased, and the filtering effect of the first filter cloth, the second filter cloth and the third filter cloth is improved.

In one possible implementation, the filter assembly further includes a threaded tap that is threadably coupled to the ash port.

Through adopting above-mentioned technical scheme, the screw tap can be dismantled through the screw with the ash discharge mouth and be connected, but the ash discharge mouth is sealed to the screw tap, when the staff need open the ash discharge mouth, unscrew in the room and take off the screw tap can, have the effect of easy operation convenient.

In one possible implementation, the filter bag further comprises a collecting portion, one end of the collecting portion is connected with one end of the first filter cloth, the second filter cloth and the third filter cloth, which is away from the fixing plate, the collecting portion is provided with an opening, and the opening forms the ash discharge opening.

Here, increase the collecting part in the one end of first filter cloth, second filter cloth and third filter cloth, filter the dust and impurity that bag was collected and can drop in the collecting part, can make dust collector can collect more dust and impurity, prolonged the interval time that needs clearance dust collector, need not frequent clearance dust collector of staff, further make dust collector's clearance work comparatively simple and convenient.

In one possible implementation, the filter assembly further comprises at least one support skeleton, the support skeleton being provided on at least one of the first, second and third filter cloths.

By adopting the technical scheme, it can be understood that the air blown to the first filter cloth, the second filter cloth and the third filter cloth from the ventilation opening of the frame causes the first filter cloth, the second filter cloth and the third filter cloth to have a certain deformation effect, and the filtering effect of the first filter cloth, the second filter cloth and the third filter cloth can be influenced when serious; the supporting framework has certain hardness and strength, and the supporting framework is arranged on at least one of the first filter cloth, the second filter cloth and the third filter cloth, so that the integral strength of the first filter cloth, the second filter cloth and the third filter cloth can be improved, the influence of the blowing force of air is not easy to happen, and the working stability of the first filter cloth, the second filter cloth and the third filter cloth is improved.

In one possible implementation, the dust removing device further includes a sealing member disposed on the frame, and the sealing member is used to seal a gap between the frame and the wall in the room.

By adopting the technical scheme, the sealing element can improve the tightness between the frame and the indoor wall body, and air with dust and impurities can not enter the room through the gap between the frame and the indoor wall body.

In one possible implementation, the seal is a foam.

By adopting the technical scheme, the foam rubber has the characteristics of strong viscosity, short drying time and good environmental protection, and meanwhile, the cost is lower, so that the manufacturing cost of the dust removing device can be reduced.

In one possible implementation, at least one of the first, second and third filter cloths is a polyester needled felt cloth

By adopting the technical scheme, the terylene needled felt cloth has the characteristics of high air permeability, wear resistance and corrosion resistance, and the service lives of the first filter cloth, the second filter cloth and the third filter cloth can be prolonged.

In addition, the terylene needled felt cloth also has an antistatic effect, and it is understood that the first filter cloth, the second filter cloth and the third filter cloth can not generate static electricity, so that dust and impurities in the air can not be adsorbed on the surfaces of the first filter cloth, the second filter cloth and the third filter cloth by static electricity, and the dust on the first filter cloth, the second filter cloth and the third filter cloth can be cleaned by workers conveniently.

In one possible implementation, the frame is a metal frame.

Through adopting above-mentioned technical scheme, it can understand that in the dust collector frame need bear the gravity and the blowing power of air from the filter bag, set up the frame as metal frame can improve the whole hardness and the intensity of frame, and then improve the life of frame.

In summary, the application has the following beneficial effects:

1. When the dust removing device is used for a period of time, a worker is required to clean the dust removing device, the worker only needs to open the dust discharging port indoors and flap the filter bag, so that dust and impurities in the filter bag can be discharged, and then the dust discharging port is closed again; the whole dust collector is not required to be detached from the lower wall body by a worker, the convenient effect that the frame is not required to be detached can be achieved by one-time installation, and then the dust collector is convenient and quick to clean, and labor time of a large number of workers is saved.

2. The fixed plate has certain hardness and intensity, can support first filter cloth, second filter cloth and third filter cloth, is difficult for making first filter cloth, second filter cloth and third filter cloth because external wind-force is too big leads to deformation influence filter effect.

3. When the worker needs to open the ash discharging port, the worker unscrews and takes down the threaded cock indoors, and the operation is simple and convenient.

Drawings

The following detailed description of the embodiments of the application is provided in connection with the accompanying drawings, it being understood that the embodiments described herein are for purposes of illustration and explanation only, and the application is not limited to the embodiments described below.

Fig. 1 is a schematic structural diagram of a dust removing device according to an embodiment of the present application;

FIG. 2 is a schematic view of the frame of FIG. 1;

FIG. 3 is a schematic view of the frame and the fixing plate in FIG. 1;

FIG. 4 is a schematic view of the threaded faucet of FIG. 1 installed toward the ground;

FIG. 5 is a schematic view of the structure of FIG. 4 from another perspective;

FIG. 6 is a schematic view of the structure of FIG. 4 at a further view angle;

FIG. 7 is a schematic view of the threaded tap of FIG. 1 mounted toward the side facing away from the frame;

FIG. 8 is a schematic view of the dust removing device in FIG. 7;

FIG. 9 is a schematic view of the structure of FIG. 8 from another perspective;

Fig. 10 is a schematic structural diagram of the further view of fig. 8.

Reference numerals illustrate:

100. a frame; 110. a vent;

200. A filter assembly;

210. A filter bag; 211. a filtering part; 2111. a fixing plate; 2112. a first filter cloth; 2113. a second filter cloth; 2114. a third filter cloth; 212. a collection section;

220. an ash discharge port;

230. a threaded tap.

Specific embodiments of the present application have been shown by way of the above drawings and will be described in more detail below. The drawings and the written description are not intended to limit the scope of the inventive concepts in any way, but rather to illustrate the inventive concepts to those skilled in the art by reference to the specific embodiments.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions in the preferred embodiments of the present application will be described in more detail with reference to the accompanying drawings in the preferred embodiments of the present application. In the drawings, the same or similar reference numerals refer to the same or similar components or components having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of the application. The embodiments described below by referring to the drawings are illustrative and intended to explain the present application and should not be construed as limiting the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application. Embodiments of the present application will be described in detail below with reference to the accompanying drawings.

In the description of the present application, it should be noted that, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, indirectly connected through an intermediary, or may be in communication with each other between two elements or in an interaction relationship between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present application, it should be understood that the terms "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present application and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.

In the description of the present application, the meaning of "a plurality" is two or more, unless specifically stated otherwise.

The terms first, second, third, fourth and the like in the description and in the claims and in the above drawings are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order.

Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The dustproof net is a simple, practical and economical protective measure, and is mainly used for preventing outdoor dust and sundries from entering a room, keeping indoor air clean, and has wide application range, so that equipment, buildings and environments can be protected, and the working and life quality of people can be improved.

For buildings in sand and dust weather throughout the year, such as photovoltaic power plants, which are often subjected to sand and dust weather, the dust screen is of greater importance in the on-site inversion house.

In the related art, a dust screen is equipped in a building and is usually connected with a wall body by using a screw or a bolt, and after a period of use, the dust screen needs to be cleaned to prevent the dust screen from being blocked and keep the normal working state of the dust screen, the existing dust screen cleaning mode is to unscrew the screw or the bolt, then detach the dust screen for cleaning, and reinstall the dust screen by the screw or the bolt after cleaning.

However, the dust screen is usually disposed in a relatively narrow hole, and when a worker is disassembling the screw or bolt of the dust screen, a lot of time is required and the worker is required to operate outdoors, so that the worker is inconvenient to clean the dust screen.

According to the dust removing device, the filter bag, the collecting part and the threaded cock are arranged, so that the dust screen is installed and detached indoors, a worker does not need to wind outdoors to operate when cleaning the dust removing device, and the dust discharging port can be opened indoors to clean the filter bag, so that the problem that the dust screen is inconvenient to disassemble, assemble and clean by the worker is solved.

Fig. 1 is a schematic structural diagram of a dust removing device according to an embodiment of the present application; FIG. 2 is a schematic view of the frame of FIG. 1; FIG. 3 is a schematic view of the frame and the fixing plate in FIG. 1; FIG. 4 is a schematic view of the threaded faucet of FIG. 1 installed toward the ground; FIG. 5 is a schematic view of the structure of FIG. 4 from another perspective;

FIG. 6 is a schematic view of the structure of FIG. 4 at a further view angle; FIG. 7 is a schematic view of the threaded tap of FIG. 1 mounted toward the side facing away from the frame; FIG. 8 is a schematic view of the dust removing device in FIG. 7; FIG. 9 is a schematic view of the structure of FIG. 8 from another perspective; fig. 10 is a schematic structural diagram of the further view of fig. 8. Fig. 1 to 10 are schematic diagrams illustrating components of the dust removing device, and specific structures of the remaining components of the dust removing device are not limited to the illustrations of fig. 1 to 10.

The application will now be described in detail with reference to the accompanying drawings and examples:

Referring to fig. 1 to 6, the dust removing device provided by the embodiment of the application is used for being installed on an indoor wall body, so that a worker can clean the dust removing device indoors conveniently. The dust removing device includes: a frame 100 and a plurality of filter assemblies 200.

The filter assembly 200 includes filter bags 210, each filter bag 210 being connected to the frame 100; the frame 100 is used for being installed on an indoor wall, a plurality of ventilation openings 110 are formed in the frame 100, the filter bags 210 are provided with collecting openings and ash discharging openings 220, and the ventilation openings 110 are communicated with the collecting openings in a one-to-one correspondence manner, so that the filter bags 210 filter dust and impurities in air blown into the indoor through the collecting openings; the filter bag 210 is attached to the frame 100 on the side facing the interior of the room.

The filter bag 210 is configured to collect dust and foreign substances, and to discharge the dust and foreign substances through the dust discharge port 220.

Further, the frame 100 is a metal frame 100. The frame 100 of the dust removing device needs to bear gravity from the filter bag 210 and blowing force of air, and the frame 100 is arranged as the metal frame 100, so that the overall rigidity and strength of the frame 100 can be improved, and the service life of the frame 100 can be further prolonged.

Optionally, since the frame 100 is not required to be disassembled when the dust removing device is cleaned, the installation mode of the frame 100 and the indoor wall is not limited, and the effect of long-term use of the frame 100 can be realized by one-time installation through screws or bolts and the like.

In the above embodiment, outdoor air enters the collection port in the filter bag 210 through the ventilation opening 110 on the frame 100 and then is blown to the filter bag 210, the filter bag 210 filters dust and impurities in the air and causes the dust and impurities in the air to adhere to the filter bag 210 or drop to the dust discharge port 220, when the dust removing device is used for a period of time, a worker is required to clean the dust removing device, the worker only needs to open the dust discharge port 220 indoors and flap the filter bag 210, the dust and impurities in the filter bag 210 can be discharged, and then the dust discharge port 220 is closed again, so that the cleaning work of the dust removing device can be completed.

The whole dust collector is not required to be detached from the lower wall body by a worker, the convenient effect that the frame 100 is installed once without being detached can be achieved, the dust collector is convenient and quick to clean, and labor time of a large number of workers is saved.

Alternatively, the filter bag 210 includes a filter portion 211, and the filter portion 211 includes a fixing plate 2111, a first filter cloth 2112, a second filter cloth 2113, and a third filter cloth 2114.

The first, second and third filter cloths 2112, 2113 and 2114 are sequentially connected and the same end is connected to the fixing plate 2111, the other ends of the first, second and third filter cloths 2112, 2113 and 2114 form the dust discharge port 220, and the fixing plate 2111, the first and third filter cloths 2112 and 2114 are connected to the inner side wall of the ventilation opening 110.

Here, the first, second and third filter cloths 2112, 2113 and 2114 collectively enclose an action area where the filter bag 210 filters dust and foreign matter in the air, and the fixing plate 2111 supports the first, second and third filter cloths 2112, 2113 and 2114, so that the first, second and third filter cloths 2112, 2113 and 2114 are not easily deformed due to excessive external wind force to affect the filtering effect.

Alternatively, in order to increase the contact area of the air blown from the vent 110 of the frame 100 to the first, second, and third filter cloths 2112, 2113, and 2114 with the first, second, and third filter cloths 2112, 2113, and 2114, the first and third filter cloths 2112, 2114 are symmetrically disposed at both sides of the fixing plate 2111, and the projected width of the second filter cloth 2113 on the frame 100 is smaller than the width of the vent 110.

It is understood that the increase in the contact area of the air blown from the vent 110 of the frame 100 to the first, second, and third filter cloths 2112, 2113, and 2114 with the first, second, and third filter cloths 2112, 2113, and 2114 is advantageous in improving the filtering effect of the first, second, and third filter cloths 2112, 2113, and 2114.

To facilitate opening and closing of the ash port 220, the filter assembly 200 further includes a threaded tap 230, the threaded tap 230 being threadedly coupled to the ash port 220. When the worker needs to open the ash discharge port 220, the worker unscrews and removes the screw tap 230 indoors, and the operation is simple and convenient.

It will be appreciated that after the first filter cloth 2112, the second filter cloth 2113 and the third filter cloth 2114 filter dust and impurities in the air, the dust and impurities will drop to the dust outlet 220, and then the dust outlet 220 is required to be opened by a worker for cleaning, so that the worker does not need to frequently clean the dust removing device, cleaning work of the dust removing device is further facilitated, the filter bag 210 further comprises a collecting portion 212, one end of the collecting portion 212 is connected with one end of the first filter cloth 2112, the second filter cloth 2113 and the third filter cloth 2114 away from the fixing plate 2111, and the collecting portion 212 is provided with an opening, and the opening forms the dust outlet 220.

Dust and impurities collected by the filter bag 210 can fall into the collecting part 212, so that the dust removing device can collect more dust and impurities, and the interval time for cleaning the dust removing device is prolonged.

Optionally, the collecting portion 212 is funnel-shaped, so that an opening for installing the threaded plug 230 is formed at the closing-up position of the collecting portion 212, and the funnel-shaped collecting portion 212 is beneficial to collecting dust and impurities during ash discharge, so that dust and impurities cannot be collected in a centralized manner due to the overlarge ash discharge port 220.

Further, the threaded cock 230 may be disposed toward the indoor ground, and a worker unscrews the threaded cock 230 in a direction close to the ground to open the ash discharge port 220, so as to facilitate rapid cleaning of dust and impurities.

Alternatively, referring to fig. 7 to 10, the threaded cock 230 may be disposed in a direction facing indoors, i.e., away from the frame 100, and when the frame 100 is installed at a position closer to the ground, a worker may conveniently unscrew the threaded cock 230 to a side facing away from the frame 100, thereby improving the applicability of the dust removing apparatus.

To further provide the filter bag 210 with a better stiffness and strength, the filter assembly 200 further includes at least one support frame disposed on at least one of the first, second, and third filter cloths 2112, 2113, 2114.

Alternatively, the supporting frame includes a plurality of iron wires uniformly penetrating inside at least one of the first, second and third filter cloths 2112, 2113 and 2114 without leaking out, forming the supporting frame, it being understood that air blown from the vent 110 of the frame 100 toward the first, second and third filter cloths 2112, 2113 and 2114 makes the first, second and third filter cloths 2112, 2113 and 2114 have a certain deformation effect, and may affect the filtering effect of the first, second and third filter cloths 2112, 2113 and 2114 in severe cases; the iron wire has certain hardness and strength, so that the integral strength of the first filter cloth 2112, the second filter cloth 2113 and the third filter cloth 2114 can be improved, the influence of the blowing force of air is not easy to be caused, and the working stability of the first filter cloth 2112, the second filter cloth 2113 and the third filter cloth 2114 is improved. The arrangement of the plurality of wires is not limited here as long as the strength of at least one of the first filter cloth 2112, the second filter cloth 2113, and the third filter cloth 2114 can be improved.

Optionally, the dust removing device further includes a sealing member provided on the frame 100, and the sealing member is used to seal a gap between the frame 100 and a wall body in the room.

In order to reduce the cost, the sealing member is a foam rubber, which can improve the sealing property between the frame 100 and the indoor wall, and can not allow air with dust and impurities to enter the indoor through the gap between the frame 100 and the indoor wall.

Further, at least one of the first filter cloth 2112, the second filter cloth 2113 and the third filter cloth 2114 is a polyester needled felt cloth. The polyester needled felt cloth has the characteristics of high air permeability, abrasion resistance and corrosion resistance, and can prolong the service lives of the first filter cloth 2112, the second filter cloth 2113 and the third filter cloth 2114.

In addition, the dacron needled felt cloth has an antistatic effect, and it is understood that the first filter cloth 2112, the second filter cloth 2113 and the third filter cloth 2114 do not generate static electricity, so that dust and impurities in the air are not electrostatically adsorbed on the surfaces of the first filter cloth 2112, the second filter cloth 2113 and the third filter cloth 2114, and the dust on the first filter cloth 2112, the second filter cloth 2113 and the third filter cloth 2114 is conveniently cleaned by a worker.

The implementation principle of the dust removing device of the embodiment of the application is as follows: through setting up filter bag 210, collection portion 212 and screw tap 230, make the dust screen alright be installed and dismantle indoor, the staff need not to wind to the outdoor operation when cleaning dust collector, unscrews in the room and takes off screw tap 230 and claps the action to filter bag 210, can accomplish the clearance of filter bag 210, has solved the staff and has carried out dismouting and washing inconvenient problem to the dust screen.

Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of the application following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the application pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.

It is to be understood that the application is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the application is limited only by the appended claims.

Claims (10)

1. A dust collector for installation on an indoor wall, the dust collector comprising: a frame and a plurality of filter assemblies, the filter assemblies comprising filter bags, each filter bag being connected to the frame; the frame is used for being installed on the indoor wall body, a plurality of ventilation openings are formed in the frame, the filter bags are provided with collecting openings and ash discharging openings, and the ventilation openings are communicated with the collecting openings in a one-to-one correspondence mode, so that the filter bags filter dust and impurities in air blown into the indoor through the collecting openings;

the filter bag is configured to collect the dust and foreign matter and to discharge the dust and foreign matter through the dust discharge port.

2. The dust removal device of claim 1, wherein the filter bag comprises a filter portion comprising a fixed plate, a first filter cloth, a second filter cloth, and a third filter cloth; the first filter cloth, the second filter cloth and the third filter cloth are sequentially connected and the same end is connected with the fixing plate, the other ends of the first filter cloth, the second filter cloth and the third filter cloth form an ash discharge port, and the fixing plate, the first filter cloth and the third filter cloth are connected with the inner side wall of the ventilation opening.

3. The dust removing apparatus according to claim 2, wherein the first filter cloth and the third filter cloth are symmetrically disposed on both sides of the fixing plate, and a width of a projection of the second filter cloth on the frame is smaller than a width of the ventilation opening.

4. The dust extraction device of claim 2, wherein the filter assembly further comprises a threaded tap that is threadably coupled to the ash port.

5. The dust removing device according to claim 2, wherein the filter bag further comprises a collecting portion, one end of the collecting portion is connected to one end of the first filter cloth, the second filter cloth and the third filter cloth facing away from the fixing plate, the collecting portion is provided with an opening, and the opening forms the dust discharge port.

6. The dust extraction device of claim 2, wherein the filter assembly further comprises at least one support frame, the support frame being disposed on at least one of the first, second, and third filter cloths.

7. The dust extraction device of claim 1, further comprising a seal disposed on the frame and configured to seal a gap between the frame and a wall within the chamber.

8. The dust extraction device of claim 7, wherein the seal is a foam.

9. The dust removing apparatus according to any one of claims 2 to 6, wherein at least one of the first filter cloth, the second filter cloth, and the third filter cloth is a polyester needled felt cloth.

10. The dust extraction device of any one of claims 1 to 8, wherein the frame is a metal frame.