CN114810628B - Air filter - Google Patents

Abstract

The invention is applicable to the field of gas circulation, and provides an air filter, which comprises: the middle part of the shell is provided with a hollow area, the periphery of the hollow area of the shell is provided with an airflow cavity in a surrounding way, one side wall of the airflow cavity facing the hollow area is provided with an annular groove communicated with the hollow area, and the cavity wall of the airflow cavity of the shell is provided with an air inlet; the fan is arranged in the hollow area, and the annular groove is positioned at one side of the air inlet direction of the fan; the shielding piece is movably arranged in the hollow area and is positioned on one side of the annular groove, which is far away from the fan, and is used for closing or opening the hollow area; the filtering device is arranged in the annular groove; the baffle is movably arranged in the airflow cavity, and can rotate unidirectionally from the outside of the shell towards the airflow cavity to open the air inlet. The air filter provided by the invention has diversified use functions, can better meet different requirements of users, and can reduce cost.

Description

an air filter

technical field

The invention belongs to the field of gas circulation, and in particular relates to an air filter.

Background technique

The existing air replacement equipment has a single function, such as an air filter, which only has a filtering function, that is, the airflow passing through the air filter can only pass through the path of the filter device. The structure of this filter has the following limitations: Filter gas, the flow rate of filtered gas is limited by the throughput of the filter device, and it cannot be circulated quickly when the indoor and outdoor air needs to be circulated, that is, the dust and other harmful particles in the air in the space that needs to be discharged from the indoor and outdoor sides cannot be disposed of in time; For example, the air exhaust fan only has the function of exhausting and exhausting but not the function of filtering. If the application scenario needs to meet two functions, it is necessary to install two kinds of equipment at the same time, resulting in excessive space occupation and increased cost.

Contents of the invention

The air filter provided by the present invention aims to solve the problems of excessive space occupation and cost increase caused by single use of existing functions in the prior art.

The present invention is achieved in this way. An air filter is used for ventilating the interior space and the exterior space, comprising:

The housing has a hollow area in the middle, and an air flow chamber is arranged around the hollow area of the housing. The side wall of the air flow chamber facing the hollow area is provided with an annular groove communicating with the hollow area. The housing is provided with an air inlet on the wall of the air flow chamber;

A fan is arranged in the hollow area, and the annular groove is located on one side of the air inlet direction of the fan;

A shutter, movably arranged in the hollow area and located on the side of the annular groove away from the fan, for closing or opening the hollow area;

filter device, located in the annular groove;

A baffle is movably arranged in the airflow chamber, and the baffle can rotate in one direction from the outside of the casing toward the airflow chamber to open the air inlet.

Further, the shutter is a folding fan structure, when the shutter is opened, the hollow area can be fully or partially closed; when the shutter is folded, the hollow area can be fully or partially opened.

Further, a fixed bracket is provided in the hollow area, and the fixed bracket includes a central part located at the center of the hollow area and at least two fixed rods connecting the central part and the edge of the hollow area, and the fixed bracket There is a toggle lever arranged one by one with the fixed lever, one end of the toggle lever is rotatably connected to the central part, and the other end extends along the side wall of the hollow area and is movably fixed to the The casing, the baffle is arranged between the fixed bracket and the toggle lever, one side of the shield is fixed to the fixed bracket, and the other side is connected to the toggle lever, when When the toggle lever rotates, the toggle lever can drive the baffle to expand or fold.

Further, at least two of the fixing rods and the shifting rods are both evenly distributed in the hollow area, and the end of the shifting rod connected to the central part is integrally arranged.

Further, the air filter further includes a first driving member fixed on the fixing bracket, and the first driving member drives the toggle lever to rotate.

Further, the fixing rod is provided with accommodating grooves for accommodating the shielding member and/or the toggling rod on opposite sides facing the rotating direction of the toggling rod.

Further, the surrounding side walls of the hollow area are provided with installation grooves into which the shielding element can be inserted, and the shielding elements can move in the installation grooves.

Further, the shielding member is a plate-shaped structure capable of being rolled up, the shielding member is arranged on the housing through the hollow area, the shielding member partially extends out of the housing, and the shielding member The air filter also includes a roll arranged outside the housing and a second driving member for driving the roll to rotate, one side of the shielding member is fixed to the roll, and when the roll rotates , the shielding member can be rolled up on the roll to open the hollow area or unfolded toward the hollow area to close the hollow area.

Further, the surrounding sidewalls of the hollow area are provided with installation grooves into which the shielding member can be inserted, and the part of the installation grooves facing the winding roller side extends to the surface of the housing.

Further, the air inlet is arranged on the side of the airflow along the hollow area, on the same side of the housing as the annular groove, and on the side of the airflow cavity away from the annular groove. One of the modes on one side of the groove, a combination of two modes, or all three modes are set at the same time.

Further, a protective net is provided in the hollow area, and the protective net is located at the outermost two ends of the hollow area along its central line.

The present invention provides an air filter for two-way ventilation between the inner space and the outer space, including:

The housing has a hollow area in the middle, and an air flow chamber is arranged around the hollow area of the housing, and an annular groove communicating with the hollow area is provided on the side of the air flow chamber facing the hollow area. The airflow chamber includes a left airflow chamber and a right airflow chamber arranged along the center line of the hollow area, the housing is respectively provided with a left air inlet on the wall of the left airflow chamber, There is a right air inlet on the cavity wall;

The fan is arranged in the hollow area and has the same air volume capacity when it is forward and reverse, and the annular groove includes a left annular groove and a right annular groove located on opposite sides of the fan;

The shutter is used to close or open the hollow area, including a left shutter and a right shutter, the left shutter and the right shutter are movably arranged in the hollow area and respectively located in the left annular groove and the right annular the side of the slot away from the fan;

A filtering device, including a left filtering device respectively arranged in the left annular groove and a right filtering device arranged in the right annular groove;

The baffle includes a left baffle movably arranged in the left airflow chamber and a right baffle arranged in the right airflow chamber respectively, and the left baffle can be directed toward the left airflow from the outside of the casing The cavity is unidirectionally rotated to open the left air inlet, and the right baffle can be unidirectionally rotated from the outside of the casing toward the right air flow chamber to open the right air inlet.

The beneficial effect achieved by the present invention is that by setting two gas flow paths, that is, one flow path is a gas filtration path, and the other flow path is an air flow exchange path, which not only has the ability to filter air, but also It can be used as a window for the natural circulation of air, which can increase the flow channels in the closed space. When the fan is started, it can also accelerate the air circulation in the inner and outer spaces, quickly improve the gas replacement efficiency in the inner and outer spaces, and open the different sizes of the hollow area 11 by adjusting the shutter. , can also adjust the amount of circulating air, and the use of functions is diversified, which can better meet the different needs of users and reduce costs.

Description of drawings

Fig. 1 is the structural representation of a kind of air filter provided by the present invention;

Fig. 2 is a schematic diagram of a partially unfolded state of the left shield or the right shield of the folding fan structure of an air cleaner provided by the present invention;

Fig. 3 is a schematic diagram of the folding state of the left or right shielding part of the folding fan structure of an air filter provided by the present invention;

Fig. 4 is a schematic diagram of the fully unfolded state of the left shield or the right shield of the folding fan structure of an air filter provided by the present invention;

Fig. 5 is a schematic diagram of the installation structure of a fixed bracket, a toggle lever and a shield of an air filter provided by the present invention;

Fig. 6 is a partially exploded schematic diagram of a shielding member of a plate-shaped structure of an air filter provided by the present invention;

Fig. 7 is a structural schematic diagram of an air filter provided by the present invention installed on a carrier.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

Embodiment one

Referring to Figures 1-4, an air filter provided by an embodiment of the present invention is used for ventilating the internal space and the external space. Baffle 5. Wherein, the middle part of the housing 1 is provided with a hollow area 11, and the housing 1 is provided with an air flow cavity 12 around the hollow area 11, and the side wall of the air flow cavity 12 facing the hollow area 11 is provided with an annular groove 13 communicating with the hollow area 11, The housing 1 is provided with an air inlet 14 on the wall of the air flow chamber 12, the fan 2 is arranged in the hollow area 11, the annular groove 13 is located on one side of the air inlet direction of the fan 2, and the shielding member 3 is movable in the hollow area 11 And located on the side of the annular groove 13 away from the fan 2, the shutter 3 is used to close or open the hollow area 11, the filter device 4 is arranged in the annular groove 13, the baffle 5 is movably arranged in the air flow chamber 12, the baffle 5 It can be rotated in one direction from the outside of the housing 1 toward the airflow cavity 12 to open the air inlet 14 .

A hollow area 11 is set in the middle of the housing 1. When the shutter 3 opens the hollow area 11, the inner and outer spaces can be directly connected through the hollow area 11, so that the airflow in the inner and outer spaces can quickly flow through the hollow area 11 to realize the inner and outer two spaces. The airflow exchange of the space, starting the blower fan 2 can speed up the air flow velocity of the two spaces inside and outside passing through the hollow area 11; the airflow chamber 12 is set around the hollow area 11, and the airflow chamber 12 is provided with the annular groove 13 communicated with the hollow area 11, and An air inlet 14 is provided on the airflow chamber 12. When the shutter 3 closes the hollow area 11, the fan 2 is started, and the fan 2 can form a negative pressure on the side of the shutter 3 facing the fan 2. At this time, the external space The air flow can push the baffle plate 5 to rotate to open the air inlet 14, enter the air flow chamber 12 from the air inlet 14, and then enter the hollow area 11 from the annular groove 13, and be transported to the inner space by the fan 2, and the annular groove 13 is provided with a filter device 4, The air entering the external space can be filtered and then transported to the internal space, so as to achieve the purpose of filtering the air.

The air filter provided by the present invention has two gas flow paths, that is, one flow path is a gas filter path, and the other flow path is an air flow exchange path, which not only has the ability to filter air, but also It can be used as a window for natural air circulation, which can increase the flow channel in the closed space. When the fan 2 is started, the air circulation in the inner and outer spaces can be accelerated, and the gas replacement efficiency in the inner and outer spaces can be quickly improved. Open the hollow area 11 by adjusting the shutter 3 Different sizes can also adjust the amount of circulating air, and the use of functions is diversified, which can better meet the different needs of users and reduce costs.

Specifically, the baffle plate 5 is rotatably arranged in the airflow cavity 12 and closes the air inlet 14, and at the same time, an elastic member that provides a pretightening force for closing the air inlet 14 to the baffle plate 5 is provided at the rotational connection of the baffle plate 5 (in the figure not shown), when the shutter 3 closes the hollow area 11 and starts the fan 2, the hollow area 11 is located at the air inlet 14 of the fan 2 to form a negative pressure, so that the gas outside the housing 1 pushes the baffle 5 to enter the airflow In the cavity 12, when the fan 2 is turned off, the elastic member makes the baffle 5 close the air inlet 14. Further, the elastic member may be but not limited to a torsion spring.

Specifically, a fixed support (not shown in the figure) for fixing the fan 2 is provided in the hollow area 11 to facilitate the installation of the fan 2 . Furthermore, the fixed support can adopt a multi-link structure with a common starting point and a circumferential arrangement, wherein the number of connecting rods is at least two, and three pieces are used in this embodiment. In this way, the fixed support can be stably fixed in the hollow area 11, it can also prevent the fixed support from occupying too much hollow area 11 and affecting the air volume of circulation.

In this embodiment, the filter device 4 can adopt an existing air filter structure, and the structure of the filter device 4 will not be further described in detail here.

It should be noted that the "inner space" and "outer space" mentioned in this embodiment are relative to the space on one side of the air filter that needs air to enter when replacing air. "External space", rather than simply referring to the commonly referred to as indoor and outdoor.

Embodiment two

Referring to Figures 2-4, on the basis of Embodiment 1, further, the shutter 3 is a folding fan structure. When the shutter 3 is opened, the hollow area 11 can be completely or partially closed; when the shutter 3 is folded, it can be fully closed. The hollow area 11 is opened or partially opened. By using the folding fan structure, the shielding member 3 can be folded or opened in the circumferential direction, so as to realize closing or opening of the hollow area 11 . This design solution can reduce the space occupied by the air filter when the shielding member 3 moves.

Embodiment three

Referring to Figures 2 and 3, on the basis of the second embodiment, further, the hollow area 11 is provided with a fixed bracket 6, and the fixed bracket 6 includes a central part (not shown in the figure) located in the center of the hollow area 11 and a connecting central part And at least two fixed rods 61 on the edge of the hollow area 11, the fixed bracket 6 is provided with a toggle rod 7 configured one by one with the fixed rods 61, one end of the toggle rod 7 is rotatably connected to the central part, and the other end is along the hollow The side wall of the area 11 is extended and movably fixed to the housing 1. The baffle plate 5 is arranged between the fixed bracket 6 and the toggle lever 7. One side of the shield 3 is fixed to the fixed bracket 6, and the other side is connected to the toggle lever. The rods 7 are connected, that is, a shutter 3 is arranged between each toggle rod 7 and each fixed rod 61, so that a plurality of shutters 3 can completely cover the hollow area 11 in different regions. When the toggle rod 7 rotates , the toggle lever 7 can drive the baffle 5 to expand or fold. The fixed bracket 6 is provided so that the shutter 3 can be fixed in the hollow area 11, and the cooperation of the fixed rod 61 and the toggle lever 7 enables the shutter 3 of the folding fan structure to be firmly fixed on the fixed bracket 6, and can be fixed by rotating the dial. Move the lever 7 to realize the unfolding or folding of the folding fan.

Further, both the at least two fixed rods 61 and the toggle rod 7 are evenly distributed in the hollow area 11 , and the end of the toggle rod 7 connected to the central part is integrally connected. In this way, at least two toggle levers 7 form an integrated structure, that is, when a single toggle lever 7 is rotated, all the toggle levers 7 can be rotated at the same time to simultaneously unfold or fold all the shutters 3 in the hollow area 11, The closing or opening speed of the hollow area 11 is thereby increased.

In this embodiment, three fixing rods 61 are used, which are evenly distributed in the hollow area 11 , so that the fixing bracket 6 can form a stable structure, thereby facilitating the fixing of the shielding member 3 and reducing the space occupied by the hollow area 11 .

Further, the surrounding sidewalls of the hollow area 11 are provided with installation grooves 15 into which the shielding member 3 can be inserted and moved, and the shielding member 3 can move in the installation groove 15 . This facilitates the fixing of the shutter 3 in the hollow area 11 to improve the airtightness of the shutter 3 when closing the hollow area 11 . Specifically, when the shutter 3 adopts a folding fan structure, during the unfolding or folding process of the shutter 3, the side inserted into the installation groove 15 can move along the installation groove 15 in the installation groove 15, and the shutter 3 is always inserted into the installation groove 15 during this process. In the installation groove 15.

Embodiment Four

Referring to FIG. 3 , on the basis of the third embodiment, further, the air filter further includes a first driving member 8 fixed on the fixing bracket 6 , and the first driving member 8 drives the toggle lever 7 to rotate. By setting the first driving member 8 to drive the toggle lever 7 to rotate, automatic driving of the toggle lever 7 can be realized, which is beneficial to the automatic control of the air filter.

In this embodiment, the first driving member 8 can be a motor.

Embodiment five

Referring to Figures 3 and 5, on the basis of Embodiment 3 or Embodiment 4, further, the fixed rod 61 is provided with housings that can accommodate the shutter 3 and/or the shift rod 7 on opposite sides of the rotation direction of the shift rod 7 . Accommodating groove 61. That is, the accommodation groove 61 is provided with accommodation grooves 61 on opposite sides along the rotating direction of the dialing circle, so that when the toggle rod 7 rotates, the shutter 3 is folded, and the toggle rod 7 and/or the shield 3 can be accommodated in the accommodation groove 61. The shifting rod 7 and the shielding member 3 are hidden in the fixed bracket 6, so that the shielding member 3 and/or the shifting rod 7 can be hidden.

Embodiment six

Referring to FIG. 6 , on the basis of Embodiment 1, further, the shielding member 3 is a plate-like structure with the ability to be rolled up. The shielding member 3 is provided on the housing 1 through the hollow area 11 , and the shielding member 3 is partially extended Outside the casing 1, the air filter also includes a winding roller 9 arranged outside the casing 1 and a second driving member 10 that drives the winding roller 9 to rotate. One side of the shielding member 3 is fixed to the winding roller 9, and the winding roller 9 When rotating, the shielding member 3 can be rolled up on the roll 9 to open the hollow area 11 or unfolded toward the hollow area 11 to close the hollow area 11 . In this way, the closing or opening of the hollow area 11 can also be realized by rolling up the shielding member 3 . With this structure, the design is simple and the cost is low.

In this embodiment, the air filter air can also include a housing 30 for fixing the winding roller 9 and the second driving member 10, and the housing 30 is sleeved outside the housing 1, so that the air filter forms an integral product structure, Easy to install and transport. In this embodiment, the second driving member 10 can be a motor.

Referring to FIG. 3 , further, the surrounding side walls of the hollow area 11 are provided with mounting grooves 15 for inserting the shielding member 3 , and the portion of the mounting grooves 15 facing the winding roller 9 extends to the surface of the casing 1 . In this way, the shutter 3 is inserted into the housing 1 along the installation groove 15 and moved from one side of the hollow area 11 to the opposite side and inserted into the installation groove 15 on the other side to achieve fixation. The fixing in the hollow area 11 is to improve the airtightness of the shutter 3 when closing the hollow area 11 .

Embodiment seven

Referring to FIG. 3 , further, the air inlet 14 is provided on the side of the airflow facing along the hollow area 11 , on the same side as the annular groove 13 of the housing 1 and in the airflow chamber 12 away from the annular groove 13 One of the methods on one side of the device, a combination of two methods, or all three methods at the same time. When one of the methods is selected to set the air inlet 14, the gas can enter the airflow chamber 12 from the outside of the housing 1. When the two methods are combined, the air intake volume of the gas can be further improved. When the three methods are set at the same time At this time, the intake air volume can be increased to the maximum to meet the needs of different scenarios for different intake volumes.

In this embodiment, multiple air inlets 14 can be provided in each way, and multiple air inlets 14 are arranged along the circumference of the airflow cavity 12 to increase the air intake of the air inlet 14 in a single way. quantity.

Embodiment Eight

Referring to FIG. 1 , on the basis of any one of the first to seventh embodiments, further, the hollow area 11 is provided with protective nets 20 , and the protective nets 20 are located at the outermost ends of the hollow area 11 along the center line. The protective net 20 is used to protect the blower fan 2 to prevent objects from entering the blower blower 2 and damaging the blower blower 2 or being injured by the blower blower 2 when the blower blower 2 is started.

Embodiment nine

Referring to FIG. 2 , the present invention also provides an air filter for two-way ventilation between the inner space and the outer space, specifically including a housing 1 , a fan 2 , a shield 3 , a filtering device 4 and a baffle 5 . Wherein, the middle part of the housing 1 is provided with a hollow area 11, and the housing 1 is provided with an air flow cavity 12 around the hollow area 11, and the side of the air flow cavity 12 facing the hollow area 11 is provided with an annular groove 13 communicating with the hollow area 11, and the air flow The chamber 12 includes a left airflow chamber 12 and a right airflow chamber 12 arranged along the centerline direction of the hollow area 11. The housing 1 is respectively provided with a left air inlet 14 on the chamber wall of the left airflow chamber 12, and a left air inlet 14 on the chamber wall of the right airflow chamber 12. The wall is provided with a right air inlet 14, the fan 2 is arranged in the hollow area 11, and has the same air volume capacity when it is forward and reverse, and the annular groove 13 includes a left annular groove 13 and a right annular groove 13 located on opposite sides of the fan 2, The shutter 3 is used to close or open the hollow area 11. The shutter 3 includes a left shutter 3 and a right shutter 3. The left shutter 3 and the right shutter 3 are movable in the hollow area 11 and respectively located in the left annular groove 13 and On the side of the right annular groove 13 away from the blower fan 2, the filter device 4 includes a left filter device 4 which is respectively arranged in the left annular groove 13 and a right filter device 4 which is arranged in the right annular groove 13, and the baffle plate 5 includes respectively movable The left baffle 5 arranged in the left airflow chamber 12 and the right baffle 5 arranged in the right airflow chamber 12, the left baffle 5 can rotate in one direction from the outside of the housing 1 toward the left airflow chamber 12 to open the left air intake Inlet 14 , the right baffle plate 5 can rotate in one direction from the outside of the housing 1 toward the inside of the right air flow chamber 12 to open the right air inlet 14 .

By utilizing the direction of the air inlet and the air outlet when the fan 2 is reversed, the hollow area 11 is respectively arranged with a set of filter airflow passages at both ends of the fan 2, so that the left and right spaces of the air filter need to be placed Without dismantling the air filter, air filtration and air replacement in any direction can be realized, and the air filter can be fully utilized so that repeated installation works can be saved.

The air filter provided by the present invention has the functions of two-way filtering and two-way ventilation. Except for the difference in the configuration of the above-mentioned structure, the rest of the mentioned structural components and installation methods are consistent with the above-mentioned one-way air filter, and will not be repeated here. Too much to repeat.

In order to facilitate the understanding of the two-way function of the present invention, referring to FIG. 7 , during use, the air filter 100 is installed on the carrier 200 (wall body), and when it is necessary to circulate the airflow from the left side (which can be indoors) to the right side (which can be outdoor), without filtering, the left baffle 5 and the right baffle 5 are opened at the same time, which can be used as natural circulation windows; It can be used as an exhaust fan; when the air on the right side is displaced to the left side, that is, the outdoor air enters the room to replace the indoor air, close the right baffle plate 5 and start the fan 2, and the air on the right side rushes through the right baffle plate 5 Enter the right air flow cavity 12 from the right air inlet 14 and then enter the hollow area 11 after being filtered by the right filter device 4 in the right annular groove 13. At this time, the blower fan 2 delivers the filtered air flow to the left space. On the contrary, it is the same for the air on the left side to be discharged into the space on the right side, which will not be repeated here.

The present embodiment provides the air filter 100 with two-way function, which can filter the indoor air and discharge it outside. For example, when the gas produced after indoor operation cannot meet the direct discharge standard, this structure can be adopted, and the outdoor air can also be filtered. It is discharged into the room to purify the air entering the room, such as daily household use, which can adapt to various use occasions and has a wide range of applications.

It should be noted that, in order to ensure that the fan blades of the fan 2 in this embodiment can equalize the air volume on both sides of the fan blades during forward and reverse rotation, the surfaces on both sides of the cross-section of the fan blades are set as planes.

It should be noted that the "left side" and "right side" mentioned herein both refer to the directions mentioned in the accompanying drawings.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. within range.

Claims (12)

1. An air cleaner for ventilating an interior space and an exterior space, comprising:

the middle part of the shell is provided with a hollow area, the periphery of the hollow area of the shell is circumferentially provided with an airflow cavity, a side wall of the airflow cavity facing the hollow area is provided with an annular groove communicated with the hollow area, and the cavity wall of the airflow cavity of the shell is provided with an air inlet;

the fan is arranged in the hollow area, and the annular groove is positioned at one side of the air inlet direction of the fan;

the shielding piece is movably arranged in the hollow area and is positioned on one side of the annular groove, which is far away from the fan, and is used for closing or opening the hollow area;

the filtering device is arranged in the annular groove;

the baffle is movably arranged in the airflow cavity, and can rotate unidirectionally from the outside of the shell towards the airflow cavity to open the air inlet;

and the elastic piece is used for providing pretightening force for closing the air inlet for the baffle plate.

2. The air cleaner of claim 1, wherein the shield is a folding fan structure that can fully or partially close the hollow region when the shield is opened; the hollow region may be fully or partially opened when the shield is folded.

3. The air cleaner of claim 2, wherein a fixing bracket is disposed in the hollow area, the fixing bracket includes a central portion disposed at the center of the hollow area and at least two fixing rods connecting the central portion and the edges of the hollow area, a toggle rod disposed one by one with the fixing rods is disposed on the fixing bracket, one end of the toggle rod is rotatably connected to the central portion, the other end of the toggle rod extends along a side wall of the hollow area and is movably fixed to the housing, the baffle is disposed between the fixing bracket and the toggle rod, one side edge of the shielding member is fixed to the fixing bracket, the other side edge of the shielding member is connected to the toggle rod, and when the toggle rod rotates, the toggle rod can drive the baffle to unfold or fold.

4. The air cleaner of claim 3, wherein at least two of the fixed rods and the tap rods are both uniformly distributed in the hollow area, and the tap rods are integrally connected to the end of the central portion.

5. The air cleaner of claim 4, further comprising a first drive member secured to the stationary bracket, the first drive member driving the tap lever to rotate.

6. An air cleaner according to any one of claims 3 to 5 wherein the opposite sides of the fixed lever to the direction of rotation of the tap lever are provided with receiving slots for receiving the shield and/or tap lever.

7. An air cleaner according to claim 3 wherein the peripheral side walls of the hollow region are provided with mounting slots into which the shield is inserted, the shield being movable within the mounting slots.

8. The air cleaner of claim 2, wherein the shield is of a plate-like structure having a windable capability, the shield is disposed on the housing so as to penetrate the hollow region, the shield extends partially out of the housing, the air cleaner further comprises a roller disposed outside the housing and a second driving member for driving the roller to rotate, one side of the shield is fixed to the roller, and the shield is windable on the roller to open the hollow region or to be unwound toward the hollow region to close the hollow region when the roller rotates.

9. The air cleaner of claim 8, wherein the peripheral side walls of the hollow region are provided with mounting grooves into which the shield member is inserted, and a portion of the mounting grooves toward the roller side extends to the housing surface.

10. The air cleaner of claim 1, wherein the air inlet is disposed on one of a side of the airflow chamber facing the hollow region, on a same side of the housing as the annular groove, and on a side of the airflow chamber facing away from the annular groove, in a combination of two or three.

11. The air cleaner of claim 1, wherein a protective screen is disposed within the hollow region, the protective screen being positioned at the outermost ends of the hollow region along a centerline thereof.

12. An air cleaner for use in two-way ventilation of an interior space and an exterior space, comprising:

the middle part of the shell is provided with a hollow area, the periphery of the hollow area is circumferentially provided with an air flow cavity, one side of the air flow cavity facing the hollow area is provided with an annular groove communicated with the hollow area, the air flow cavity comprises a left air flow cavity and a right air flow cavity which are arranged along the direction of the central line of the hollow area, the shell is respectively provided with a left air inlet on the cavity wall of the left air flow cavity, and the cavity wall of the right air flow cavity is provided with a right air inlet;

the fan is arranged in the hollow area and has the same air volume capacity in forward and reverse rotation, and the annular grooves comprise left annular grooves and right annular grooves which are positioned on two opposite sides of the fan;

the shielding piece is used for closing or opening the hollow area and comprises a left shielding piece and a right shielding piece, and the left shielding piece and the right shielding piece are movably arranged in the hollow area and are respectively positioned at one sides of the left annular groove and the right annular groove, which are far away from the fan;

the filtering device comprises a left filtering device and a right filtering device, wherein the left filtering device and the right filtering device are respectively arranged in the left annular groove;

the baffle plate comprises a left baffle plate and a right baffle plate, the left baffle plate and the right baffle plate are respectively movably arranged in the left airflow cavity, the left baffle plate can rotate unidirectionally from the outside of the shell towards the inside of the left airflow cavity to open the left air inlet, and the right baffle plate can rotate unidirectionally from the outside of the shell towards the inside of the right airflow cavity to open the right air inlet;

and the elastic piece is used for providing pretightening force for closing the air inlet for the baffle plate.