TW202144714A - Blower with cylindrical filter material - Google Patents

Abstract

The present invention provides a blower with cylindrical filter material, and its main features include: one laterally air outlet type main casing, a lateral air outlet on the outside is connected with an upper-layer accommodating cavity inside. A diversion frame is arranged in the upper-layer accommodating cavity; a centrifugal blower unit set in the diversion frame; and a hanging installation set, which is located outside the laterally air outlet type main casing, so that the laterally air outlet type main casing is installed in either a hanging type or a wall-mounted type or two types in parallel. A detachable lower casing which is combined with the bottom of the laterally air outlet type main casing in a detachable state; and a vertical cylindrical filter material placed in a detachable lower casing. The main air inlet is formed in a ring shape between the bottom end wall of the detachable lower casing and the cylindrical peripheral wall, and the main air inlet is upwardly connected to the annular space.

Description

Fresh air fan with cylindrical filter material

The present invention relates to a product with air conditioning and purification functions; in particular, it refers to an innovative structure type revealer of a fresh fan.

In today's social environment, the problem of air pollution is serious, and it has become an indisputable fact. In order to solve the problem of indoor air quality, more and more products related to air purification functions have been launched. At present, air purification products are mainly divided into air purifiers There are two types: fresh air fans (meaning fans that input fresh air).

As mentioned in the previous paragraph, the air purifier removes various air pollutants by means of adsorption, decomposition or conversion, but it cannot effectively solve the problem of carbon dioxide. Oxygen, so that people also feel that the air is not fresh. The fresh air fan mainly introduces the outdoor fresh air into the room after sterilization and disinfection, etc., so it can solve the problem of stale indoor air; Applications are becoming more common.

At present, there are many specific structural types of new fans on the market, with different advantages and functions. However, there are still some problems and shortcomings in the practical application of the conventional types, which need to be improved and made breakthroughs. For example: Some conventional fresh air fans use plate-shaped filter material as their air filtration interface. However, in order to achieve sufficient filtering area and efficiency, a large area must be set for this type of plate-shaped filter material to achieve the required efficiency. As a result, it is bound to cause the problem that the overall volume of the fresh air fan is relatively enlarged and takes up space; in addition, some conventional fresh air fans are designed to be used on the ground, but in actual use, this model is not only affected by occupying the ground space. In addition to the disadvantage of the user's indoor space utilization, when the air inlet is opened in the lower area of the body, because it is adjacent to the ground, it is easy to absorb the air with high dust content on the ground, causing the problem of rapid dust accumulation of the filter material; moreover, Because the installation position of the filter material of some conventional fresh air fans is too secret or there are too many blocking members, it is time-consuming and inconvenient for the user to replace the filter material, and even requires professionals to complete it, which is inconvenient to use. point.

Therefore, in view of the many problems existing in the above-mentioned conventional new fan technology, how to develop an innovative structure type that can be more ideal and practical needs to be further considered by the relevant industry to break through the goals and directions; in view of this , The inventor has been engaged in the manufacturing, development and design experience of related products for many years, aiming at the above-mentioned goals, after detailed design and careful evaluation, finally obtained a practical invention.

The main purpose of the present invention is to provide a new fan with cylindrical filter material, and the technical problem to be solved is to think and make innovative breakthroughs with the goal of how to develop a more ideal and practical new fan.

Based on the aforementioned purpose, the technical feature of the present invention to solve the problem is mainly that the fresh air system includes: a side-outlet type main casing, the interior is hollow to define an upper-layer accommodating cavity, and the side-outlet type main casing is hollow. The outer side is provided with a lateral air outlet in the shape of an outwardly protruding tube, the lateral air outlet is communicated with the upper-layer accommodating cavity, and a flow-guiding frame is formed in the upper-layer accommodating cavity and is connected to one side of the flow-guiding frame. A tongue part, the tongue part is connected with the lateral air outlet, and the bottom of the side air outlet main casing forms a through-flow opening, an annular bottom edge and a first combined positioning part, and the through-flow opening is upward It is communicated with the upper accommodating cavity; a centrifugal blower unit is accommodated in the upper accommodating cavity, and the centrifugal blower unit includes a driving motor and a centrifugal impeller driven to rotate by the driving motor, wherein the centrifugal impeller is accommodated in the guide Inside the frame, and the centrifugal impeller is set to run in the direction of the air outlet toward the lateral air outlet; a hanging installation part is arranged at at least one outside the side air outlet main casing, and the hanging installation part is used to make The side-outlet main casing is in a suspended or wall-mounted installation state, or two in parallel; a detachable lower casing is combined with the bottom of the side-outlet main casing in a detachable state. The detachable lower casing includes a cylindrical peripheral wall, an installation opening formed on the upper end of the cylindrical peripheral wall, and a bottom end wall connected to the lower end of the cylindrical peripheral wall, and the interior of the detachable lower casing defines a lower layer volume. The setting cavity has an installation opening and a second combined positioning portion is formed, and the second combined positioning portion is correspondingly matched with the first combined positioning portion, so that the combined state of the detachable lower casing can be positioned and present. Can be passively decomposed; a vertical cylindrical filter material is accommodated in the lower accommodating cavity, and the vertical cylindrical filter material includes an upper open end, a lower cylindrical end and a cylindrical filter portion, wherein the upper open end abuts against It is closely attached under the annular bottom edge of the bottom of the side air outlet main casing, the lower cylinder end is supported by the bottom end wall of the detachable lower casing, the cylindrical filter part and the cylindrical shape of the detachable lower casing are An annular space is formed between the peripheral walls; at least one main air inlet is formed between the bottom end wall of the detachable lower casing and the cylindrical peripheral wall in a ring shape, forming the main air inlet facing upward and annular The state in which the space is connected.

The effects and advantages of the present invention mainly include the following: First, the annular cylindrical air intake is matched with the tubular air outlet, which has a large amount of air in and out, and has high air conditioning efficiency; Second, the vertical cylindrical filter material is adopted, which can greatly reduce the installation area and space occupied by the fresh air fan compared with the plate type; Third, through the morphological features of the detachable lower casing, the replacement or removal and washing of the filter material is easier, more convenient and faster, and the user can quickly disassemble and assemble the detachable lower casing without the assistance of tools; Fourth, the suspended installation type keeps the main air inlet away from the ground, so as to obtain better air intake air quality and relatively delay the removal and washing time of the filter material.

Another object of the present invention is to add a plurality of auxiliary air inlets arranged at annular intervals in the middle section of the cylindrical peripheral wall of the detachable lower casing, and the auxiliary air inlets are set as another type of opening downward. Technical features, so as to increase the air inlet volume in the middle section of the cylindrical peripheral wall to uniform the overall air inlet distribution point, so that the dust accumulation is relatively uniform and the cleaning time is delayed; the advantage of setting the auxiliary air inlet to open downward is that it can prevent rainwater infiltrate.

Another object of the present invention is another technical feature of installing a sealing ring lining between the upper open end of the vertical cylindrical filter material and the annular bottom edge of the bottom of the side air outlet main casing, Thereby, the advantages and practical progress of making the assembly and tightness of the vertical cylindrical filter material better are achieved.

Another object of the present invention is to form an upper limit edge and a lower limit edge respectively by the bottom end of the side air outlet main casing and the bottom wall of the detachable lower casing, wherein the upper limit edge is It is used to restrain the outer periphery of the upper open end of the vertical cylindrical filter material, and the lower limit edge is used to restrain the lower cylindrical end of the vertical cylindrical filter material. Advantages and practical progress.

Another object of the present invention is to form a closed end surface by the central area of the lower cylinder end of the vertical cylindrical filter material, and further add an elastic body or the like between the closed end surface and the bottom end wall of the detachable lower casing. A technical feature is that the elastic body can be used to assist in supporting the cylindrical filter material, so that the tightness is better, and the assembly quality of the components can be further improved.

Another object of the present invention is to further provide an inverted electrical connection interface at the bottom of the side outlet main casing, and the inverted electrical connection interface corresponds to the outer position of the air guide frame. Technical features, so as to achieve the advantages and practical progress of making the electrical connectors and wires less prone to water accumulation and exposure to moisture, and effectively reducing the probability of external force collision.

Please refer to FIG. 1 to FIG. 7 , which are preferred embodiments of the fresh air fan adopting the cylindrical filter material of the present invention, but these embodiments are only for illustration, and are not limited by this structure in the patent application.

The fresh air system includes the following structures: a side-outlet type main casing 10 (note: it can be but not limited to a two-piece combined type), the interior is hollow to define an upper-layer accommodating cavity 11, the A lateral air outlet 12 in the shape of an overhanging convex tube is provided on the outer side of the side air outlet main casing 10, and the lateral air outlet 12 communicates with the upper accommodating cavity 11, and the upper accommodating cavity 11 is formed with a guide frame 13 and a tongue 14 connected to one side of the guide frame 13, the tongue 14 is connected with the lateral air outlet 12, and the side air outlet main casing 10 A through-flow port 15, a ring-shaped bottom edge 16 and a first combined positioning portion 17 are formed at the bottom, wherein the through-flow port 15 communicates upward with the upper-layer accommodating cavity 11; a centrifugal blower unit 20, containing Set in the upper accommodating cavity 11 , the centrifugal blower unit 20 includes a drive motor 21 and a centrifugal impeller 22 driven and rotated by the drive motor 21 , wherein the centrifugal impeller 22 is accommodated in the guide frame 13 , and the set running air outlet direction of the centrifugal impeller 22 is toward the lateral air outlet 12; a hanging installation portion 30 is arranged at at least one outside the side air outlet main casing 10, and the hanging installation portion 30 The installation part 30 is used to make the side air outlet main casing 10 present either a suspended type or a wall-mounted type, or a parallel installation state of both types (Note: the drawing shows the two types of parallel implementations) , the left and right upper sides and the two rear sides of the side air outlet main casing 10 are provided with lock fixing holes); a detachable lower casing 40 is combined with the side air outlet main casing. The bottom of the casing 10 is in a detachable state, and the detachable lower casing 40 includes a cylindrical peripheral wall 41 , an installation opening 42 formed on the upper end of the cylindrical peripheral wall 41 , and a port connected to the lower end of the cylindrical peripheral wall 41 . A bottom end wall 43 , a lower accommodating cavity 44 is defined inside the detachable lower casing 40 , wherein the installation opening 42 is formed with a second combined positioning portion 45 , the second combined positioning portion 45 Correspondingly cooperate with the first combined positioning portion 17, so that the combined state of the detachable lower casing 40 can achieve positioning and be in a passively disassembled state; a vertical cylindrical filter material 50 is accommodated in the lower container. Inside the cavity 44, the vertical cylindrical filter material 50 includes an upper open end 51, a lower cylindrical end 52, and a cylindrical filter portion 53, wherein the upper open end 51 abuts against the side air outlet. Below the annular bottom edge 16 at the bottom of the main casing 10 , the lower cylinder end 52 is supported by the bottom end wall 43 of the detachable lower casing 40 , and the cylindrical filter portion 53 is connected to the detachable lower casing 40 . An annular space 54 is formed between the cylindrical peripheral wall 41 of the shell 40 ; at least one main air inlet 60 is formed between the bottom end wall 43 of the detachable lower casing 40 and the cylindrical peripheral wall 41 in a shape. The annular shape constitutes a state in which the at least one main air inlet 60 communicates with the annular space 54 upward.

With the above-mentioned structural composition and technical features, the preferred structural embodiment of the fresh air blower disclosed in the present invention is specifically used as shown in FIG. 6 . The eddy current will guide the airflow toward the lateral air outlet 12 (as indicated by the arrow L1), and at this time, the detachable lower casing 40 located under the lateral air outlet main casing 10 will be pushed upward by the air. Suction to form a negative pressure, so that the outside air will be inhaled and introduced into the annular space 54 from the main air inlet 60 upward, and then pass through the cylindrical filter portion 53 of the vertical cylindrical filter material 50 (as indicated by the arrow L2). (shown) to achieve the effect of filtering the air, the filtered air is then sucked up into the centrifugal impeller 22 (as shown by arrow L3), so as to constitute the flow path state of the air purification process during the operation of the present invention; In terms of state, please refer to FIG. 8 , the fresh air fan disclosed in the present invention is generally used as a device for introducing outdoor fresh air and purifying it and other functional requirements. The main casing 10 is installed in either a suspended or wall-mounted type or in parallel, and is positioned at an appropriate height on the outer wall 101 of the building. The outer wall 101 corresponding to the lateral air outlet 12 needs to be pre-opened with a perforation. 102, and then connect the lateral air outlet 12 through the air duct 103, so as to extend and guide the fresh purified air introduced into the indoor space, or it can be branched to different rooms through the bifurcated pipeline; or as shown in Figure 9 , the lateral air outlet 12 can also be directly connected to the structure of a diversion and diffusion air outlet device 104 installed on the inner wall of the outer wall 101 installation position, so as to directly diffuse and blow the incoming fresh purified air into the room In the space, these are all implementable forms; it should be noted that the installation of the new fan disclosed in the present invention is not limited to being installed outdoors, but can also be installed indoors to discharge air to achieve the demand of negative pressure function. , this type of installation is usually used in isolation wards.

In terms of efficacy demands, the present invention can obtain a larger air volume in and out through the annular cylindrical air intake form of the vertical cylindrical filter material 50 and the tubular air outlet form of the lateral air outlet 12, thereby achieving high air conditioning efficiency. , which is more in line with the needs of users; and under the conditions of the same filter cross-sectional area comparison, the vertical cylindrical filter material 50 can greatly reduce the installation area and occupied space of the fresh air fan compared with the plate-type filter material, which is more beneficial to the user. The allocation of space utilization; in addition, through the combined type feature of the detachable lower casing 40, the falling form when disassembled is quite suitable for the posture and the smoothness of the force during manual operation, so that the The replacement or removal and cleaning of the vertical cylindrical filter material 50 is easier, more convenient and faster, and the user can quickly remove and install the detachable lower casing 40 without the aid of tools; The suspended installation type allows the main air inlet 60 to be far away from the ground, so as to obtain better air intake air quality. Relatively, the removal and cleaning time of the vertical cylindrical filter material 50 can be delayed, making the use easier and more convenient.

As shown in FIG. 2 , FIG. 3 and FIG. 6 , in this example, a plurality of auxiliary air inlets 70 arranged at annular intervals are added to the middle section of the cylindrical peripheral wall 41 of the detachable lower casing 40 , and the auxiliary air inlets 70 The air inlet 70 is arranged to have an opening facing downward. The effect of the implementation type disclosed in this example is mainly to increase the air intake volume in the middle section of the cylindrical peripheral wall 41, so as to uniformize the distribution points of the entire air intake, so that the dust accumulation is relatively uniform, thereby delaying the cleaning time; The advantage of arranging the auxiliary air inlet 70 with the opening facing downward is that it can prevent the infiltration of rainwater.

As shown in FIG. 2 , FIG. 3 and FIG. 6 , in this example, the gap between the upper open end 51 of the vertical cylindrical filter material 50 and the annular bottom edge 16 of the bottom of the side air outlet main casing 10 is further A stop ring lining 80 is installed. The function of the sealing ring lining 80 disclosed in this example is mainly to enable the assembly of the vertical cylindrical filter material 50 to achieve a better sealing state.

As shown in FIG. 6 , in this example, an upper limit edge 91 and a lower limit edge are respectively formed at the bottom end of the side outlet type main casing 10 and the bottom end wall 43 of the detachable lower casing 40 . 92, wherein the upper limit edge 91 is used to restrain the outer circumference of the upper open end 51 of the vertical cylindrical filter material 50, and the lower limit edge 92 is used to restrain the lower cylinder end of the vertical cylindrical filter material 50 52 (Note: it is not limited to constrain the outer or inner circumference of the lower cylinder end 52 of the vertical cylindrical filter material 50), so that the vertical cylindrical filter material 50 can be stably limited.

As shown in FIGS. 6 and 10 , in this example, a closed end surface 525 is formed in the central area of the lower cylindrical end 52 of the vertical cylindrical filter material 50 , and the closed end surface 525 is connected to the bottom end of the detachable lower casing 40 . An elastic body 95 is added between the walls 43 (which may be, but not limited to, a coil spring implementation). In this example, with the addition of the elastic body 95 , the main effect is to assist the support of the cylindrical filter material 50 , so that the tightness is better and the quality of the component assembly is further improved.

As shown in FIG. 2 , FIG. 3 and FIG. 5 , in this example, an inverted electrical connection interface 18 is further provided at the bottom of the side outlet main casing 10 , and the inverted electrical connection interface is 18 corresponds to the outer position of the guide frame 13 . The inverted electrical connection interface 18 disclosed in this example can be implemented in the form of an interface with holes or embedded electrical terminals, which is used as a connection interface for the power line and the sensing signal lines of the centrifugal blower unit 20; The effect of this type is mainly to make the electrical connectors and wires less prone to water accumulation and exposure to the sun, and to effectively reduce the probability of external force collision.

Wherein, the specific matching type of the second combined positioning portion 45 and the first combined positioning portion 17 includes: any one of a screw-lock type, a quick-lock type or a snap-on type. In this part, the second combined positioning portion 45 and the first combined positioning portion 17 are shown in FIG. 11 , which are in the form of quick-locking, that is, the detachable lower casing 40 abuts in place. After that, the positioning can be achieved by panning a small angle; in addition, as shown in FIG. 12 , the second combined positioning portion 45B and the first combined positioning portion 17B are screw-locked implementations, that is, internal and external threads are used. The positioning is achieved by means of screw locking; as shown in FIG. 13, the second combined positioning portion 45C and the first combined positioning portion 17C are snap-on implementations, that is, the positioning is achieved by means of elastic hooks and holes. By.

10: Side air outlet main case 11: Upper accommodating cavity 12: Lateral air outlet 13: Guide frame 14: Tongue 15: Through the mouth 16: Ring bottom edge 17: The first combination alignment part 17B: The first combination alignment part 17C: First Combination Alignment 18: Inverted electrical connection interface 20: Centrifugal blower unit 21: drive motor 22: Centrifugal impeller 30: Hanging installation department 40: Detachable lower case 41: Cylindrical peripheral wall 42: Installation port 43: Bottom end wall 44: Lower accommodating cavity 45: Second Combination Alignment Part 45B: Second Combination Alignment 45C: Second Combination Alignment 50: Vertical cylindrical filter material 51: Upper open end 52: Lower barrel end 525: closed end face 53: Cylindrical filter part 54: annular space 60: Main air inlet 70: Auxiliary air inlet 80: Stop ring lining 91: Upper limit edge 92: Lower limit edge 95: Elastomer 101: Exterior Walls 102: Perforation 103: Duct 104: Diversion and diffusion air outlet device

FIG. 1 is a combined perspective view of a preferred embodiment of the fresh air blower of the present invention. Fig. 2 is a partially exploded perspective view of a preferred embodiment of the fresh air blower of the present invention, which is used to show The detachable lower casing and the vertical cylindrical filter material are detached from the bottom of the side outlet main casing. state. 3 is an exploded perspective view of each main component of the preferred embodiment of the fresh air fan of the present invention. FIG. 4 is a preferred embodiment of the first combined positioning part and the second combined positioning part of the present invention. Schematic diagram of the decomposition corresponding relationship. Fig. 5 is an enlarged view of the part marked 5 in Fig. 2, for the purpose of magnifying the inverted electrical connection The implementation type of the interface. Fig. 6 is a vertical sectional view of a preferred embodiment of the fresh air blower of the present invention, in order to show the fresh air blower The internal structure of the combined state. FIG. 7 is a bottom view of the preferred embodiment of the detachable lower casing of the present invention, in order to show the main Implementation of air inlets and auxiliary air inlets. FIG. 8 is a diagram of a preferred embodiment of the installation form of the fresh air blower of the present invention. FIG. 9 is a diagram of another preferred embodiment of the installation mode of the fresh air blower of the present invention. Fig. 10 is an enlarged view of the part marked 10 in Fig. 6, which is to show the middle of the lower end of the vertical cylindrical filter material. The central area forms a closed end face, and the closed end face is connected to the bottom end of the detachable lower casing. An embodiment of an elastic body is added between the walls. Fig. 11 shows the quick-lock type of the first combined positioning part and the second combined positioning part of the present invention Schematic diagram of the embodiment. Fig. 12 shows that the first combined positioning part and the second combined positioning part of the present invention adopt a screw lock type Schematic diagram of the embodiment. FIG. 13 shows that the first combined positioning part and the second combined positioning part of the present invention adopt a snap-on type Schematic diagram of the embodiment.

10: Side air outlet main case

11: Upper accommodating cavity

12: Lateral air outlet

13: Guide frame

14: Tongue

15: Through the mouth

16: Ring bottom edge

18: Inverted electrical connection interface

20: Centrifugal blower unit

21: drive motor

22: Centrifugal impeller

30: Hanging installation department

40: Detachable lower case

41: Cylindrical peripheral wall

42: Installation port

43: Bottom end wall

44: Lower accommodating cavity

45: Second Combination Alignment Part

50: Vertical cylindrical filter material

51: Upper open end

52: Lower barrel end

53: Cylindrical filter part

60: Main air inlet

70: Auxiliary air inlet

80: Stop ring lining

Claims (7)

A fresh air fan using a cylindrical filter material, the fresh air fan comprises: The side air outlet main casing is hollow inside to define an upper-layer accommodating cavity, and the outer side of the side air outlet main casing is provided with a lateral air outlet in the shape of an outwardly protruding tube. The lateral air outlet communicates with the upper-layer accommodating cavity, and a guide frame and a tongue connected to one side of the guide frame are formed in the upper-layer accommodating cavity, and the tongue is connected to the lateral air outlet. connected, and the bottom of the side air outlet main casing forms a through-flow opening, an annular bottom edge and a first combined positioning portion, wherein the through-flow opening is connected upward with the upper-layer accommodating cavity; A centrifugal blower unit is accommodated in the upper accommodating cavity, the centrifugal blower unit includes a drive motor and a centrifugal impeller driven to rotate by the drive motor, wherein the centrifugal impeller is accommodated in the guide frame , and the set running air outlet direction of the centrifugal impeller is toward the lateral air outlet; A hanging installation part is arranged at at least one place outside the side air outlet main casing, and the hanging installation part is used to make the side air outlet main casing present either a suspension type or a wall hanging type. One-type or two-type parallel installation status; A detachable lower casing is assembled at the bottom of the side air outlet main casing in a detachable state. The detachable lower casing includes a cylindrical peripheral wall and a mounting plate formed on the upper end of the cylindrical peripheral wall. An opening is provided and a bottom end wall connected to the lower end of the cylindrical peripheral wall, the interior of the detachable lower casing defines a lower-level accommodating cavity, wherein the installation opening is formed with a second combined positioning portion, the first The two combined positioning parts are correspondingly matched with the first combined positioning part, so that the combined state of the detachable lower casing can achieve positioning and be in a passively disassembled state; A vertical cylindrical filter material is accommodated in the lower accommodating cavity. The vertical cylindrical filter material includes an upper open end, a lower cylindrical end and a cylindrical filter portion, wherein the upper open end is in close contact with each other. Below the annular bottom edge of the bottom of the side outlet type main casing, the lower cylinder end is supported by the bottom end wall of the detachable lower casing, and the cylinder filter part is connected to the detachable lower casing. An annular space is formed between the cylindrical peripheral walls of the casing; and At least one main air inlet is formed in a ring shape between the bottom end wall and the cylindrical peripheral wall of the detachable lower casing, and the at least one main air inlet is connected to the annular space upward. pass status. The fresh air fan using cylindrical filter material as described in claim 1, wherein the middle section of the cylindrical peripheral wall of the detachable lower casing is further provided with a plurality of auxiliary air inlets arranged at annular intervals, and the auxiliary air inlets are Set it up with the opening facing down. As claimed in claim 1 or 2, the fresh air fan using a cylindrical filter material is further installed between the upper open end of the vertical cylindrical filter material and the annular bottom edge of the bottom of the side air outlet main casing There is a stop ring lining. The fresh air blower using cylindrical filter material as claimed in claim 1 or 2, wherein the bottom end of the side outlet type main casing and the bottom end wall of the detachable lower casing are respectively formed with an upper limit edge and a lower end wall. An end limit edge, wherein the upper limit edge is used to restrain the outer periphery of the upper open end of the vertical cylindrical filter material, and the lower limit edge is used to restrain the lower cylinder end of the vertical cylindrical filter material, so as to The vertical cylindrical filter material is stabilized and limited. The fresh air fan using a cylindrical filter material as claimed in claim 1 or 2, wherein the central area of the lower cylindrical end of the vertical cylindrical filter material forms a closed end surface, and the closed end surface and the bottom end of the detachable lower casing An elastic body is added between the walls. The fresh air fan using cylindrical filter material as described in claim 1, wherein the specific matching type of the second combined positioning part and the first combined positioning part includes: a screw lock type, a quick lock type or a snap-on type. one of them. As claimed in claim 1, the fresh air fan using cylindrical filter material, wherein an inverted electrical connection interface is further provided at a bottom of the side air outlet main casing, and the inverted electrical connection interface is corresponding to on the outside of the guide frame.

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