CN215523624U - New fan - Google Patents

Abstract

The utility model provides a fresh air fan which comprises a shell, a partition plate, a fan and an electric heating assembly, wherein a fresh air inlet and a fresh air outlet are formed in the shell; the partition plate is vertically arranged in the shell, the partition plate divides the inner space of the shell into a first cavity and a second cavity, the first cavity is communicated with the fresh air inlet, the second cavity is communicated with the fresh air outlet, and the partition plate is provided with a vent hole communicated with the first cavity and the second cavity; the fan is arranged in the first cavity, the air outlet of the fan is arranged on the partition plate corresponding to the vent hole, and the air inlet of the fan is communicated with the first cavity; the electric heating assembly is arranged in the second cavity and used for heating air flowing out of an air outlet of the fan; the fresh air fan provided by the utility model avoids the influence of outdoor air on the indoor environment temperature when the fresh air fan is used in winter, improves the user experience and reduces the use cost.

Description

New fan

Technical Field

The utility model belongs to the technical field of household appliances, and particularly relates to a new fan.

Background

The fresh air machine is a device which can introduce outdoor fresh air into indoor environment to regulate the air quality of the indoor environment. However, when the outdoor temperature is low in winter, the indoor temperature is rapidly reduced when the fresh air is introduced by using the fresh air fan, and the user experience is seriously influenced. In order to improve the experience of users when the fresh air fan is used in winter, an electric heating module is generally required to be separately configured, but the use cost of the users is undoubtedly increased.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a new fan, and aims to solve the technical problems that in the prior art, the new fan is poor in user experience and high in use cost when used in winter.

In order to achieve the purpose, the utility model adopts the technical scheme that:

a new fan, comprising:

the fresh air inlet and the fresh air outlet are arranged on the shell;

the partition plate is vertically arranged in the shell, the partition plate divides the inner space of the shell into a first cavity and a second cavity, the first cavity is communicated with the fresh air inlet, the second cavity is communicated with the fresh air outlet, and the partition plate is provided with a vent hole communicated with the first cavity and the second cavity;

the fan is arranged in the first cavity, and an air outlet of the fan is arranged on the partition plate corresponding to the vent hole;

and the electric heating assembly is arranged in the second cavity and used for heating air flowing out of the air outlet of the fan.

This technical scheme is through being equipped with electric heating element between the air outlet of fan and new trend air outlet, when outdoor air is below zero, starts electric heating element, heats the air that flows from the air outlet of fan, and the air after the heating flows into indoor environment through new trend air outlet, and outdoor air is to indoor ambient temperature's influence when having avoided using new fan winter, has improved user's experience and has reduced use cost.

In some embodiments of the present application, an electrical heating assembly comprises:

the first supporting plate is arranged on the first side plate of the shell, and a first clamping part is arranged at the top of the first supporting plate;

the second supporting plate is arranged on the second side plate of the shell, and the top of the second supporting plate is provided with a second clamping part;

and one end of the top of the heating plate is clamped in the first clamping part, and the other end of the top of the heating plate is clamped in the second clamping part, so that the heating plate is respectively attached to the first supporting plate and the second supporting plate.

Electric heating assembly includes first backup pad, second backup pad and hot plate among this technical scheme, is equipped with the first block portion with hot plate top block in the first backup pad, is equipped with the second block portion with hot plate top block in the second backup pad to improve the stability of hot plate during operation, the dismantlement and the installation of the hot plate of being convenient for.

In some embodiments of the present application, the electrical heating assembly further comprises:

the first fixing plate is provided with a first clamping groove, and one end of the bottom of the heating plate close to the first side plate and the bottom of the first supporting plate are both positioned in the first clamping groove;

and the second fixing plate is provided with a second clamping groove, and the other end of the bottom of the heating plate close to the second side plate and the bottom of the second supporting plate are both positioned in the second clamping groove.

Through being equipped with among this technical scheme with hot plate bottom and first backup pad bottom matched with first fixed plate to be equipped with hot plate bottom and second backup pad bottom matched with second fixed plate, with the support hot plate, further improved the stability of hot plate work.

In some embodiments of the present application, the first clamping groove and the first supporting plate and the second clamping groove and the second supporting plate are both connected by fastening screws.

In some embodiments of the present application, a first limiting portion is disposed at the bottom of the first supporting plate and on the same side as the first engaging portion, and the first limiting portion is located below the first fixing plate;

the bottom of the second supporting plate is provided with a second limiting part which is arranged at the same side as the second clamping part, and the second limiting part is positioned below the second fixing plate.

According to the technical scheme, the first limiting part below the first fixing plate is arranged at the bottom of the first supporting plate, the second limiting part below the second fixing plate is arranged at the bottom of the second supporting plate, when the first fixing plate and the second fixing plate are disassembled, the heating plate is prevented from suddenly dropping, the safety is improved, and when the heating plate is installed, if an installing tool needs to be taken, the heating plate can be supported through the first limiting part and the second limiting part, and the use of a user is facilitated.

In some embodiments of the present application, a sound muffling box is disposed in the second cavity, silencing cotton is disposed on the inner wall of the sound muffling box, and the electric heating assembly is disposed in the sound muffling box.

Through being equipped with the amortization box in the second cavity among this technical scheme, be equipped with the amortization cotton in the amortization box for produced noise when absorbing the high-speed operation of fan has improved user's experience.

In some embodiments of the present application, the silencing cotton is adhered to the peripheral inner wall of the silencing box.

In some embodiments of the present application, the housing is rectangular.

In some embodiments of the present application, the first supporting plate and the second supporting plate are symmetrically disposed about a central connecting line of the front panel and the rear panel of the housing.

In some embodiments of this application, the vertical filter screen that is equipped with in the first cavity, and the filter screen is located between new trend air intake and the fan for filter certainly impurity in the outdoor air that the new trend air intake flowed into.

Drawings

Fig. 1 is a schematic overall structure diagram of a new air blower according to an embodiment of the present invention;

fig. 2 is a schematic view of an internal structure of a new fan according to an embodiment of the present invention;

FIG. 3 is a left side view of FIG. 1 in accordance with an embodiment of the present invention;

fig. 4 is a schematic view of an internal structure of the sound muffling box provided by the embodiment of the present invention;

FIG. 5 is a schematic structural diagram of an electrical heating assembly according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a first support plate and a second support plate according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a first fixing plate and a second fixing plate according to an embodiment of the present invention;

FIG. 8 is a first schematic view of the installation of the heating plate according to the embodiment of the present invention;

FIG. 9 is a second schematic view of the installation of the heating plate according to the embodiment of the present invention;

FIG. 10 is a third schematic view of the installation of the heating plate according to the embodiment of the present invention;

in the above figures:

10. a housing; 11. a top plate; 12. a base plate; 13. a first side plate; 14. a second side plate; 15. a front panel; 151. a first lifting lug; 16. a back panel; 161. locking; 162. a second lifting lug; 17. a cover plate; 171. a latch hook; 101. a fresh air inlet; 102. a fresh air outlet; 103. a partition plate; 1031. a vent hole; 104. a first cavity; 105. a second cavity; 20. a filter screen; 30. a fan; 31. an air inlet; 40. a sound silencing box; 41. silencing cotton; 42. a first through hole; 43. a second through hole; 50. an electrical box; 60. an electrical heating assembly; 61. a first support plate; 611. a first engaging portion; 612. a first limiting part; 62. a second support plate; 621. a second engaging portion; 622. a second limiting part; 63. heating plates; 64. a first fixing plate; 65. and a second fixing plate.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.

The terms "first", "second" and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", "third" may explicitly or implicitly include one or more of the features. In the description of the present application, "a plurality" means two or more unless otherwise specified.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

In order to solve the technical problems of poor user experience and high use cost of the fresh air fan in the prior art when the fresh air fan is used in winter, the embodiment of the utility model provides the fresh air fan.

The technical solution of the present invention will be described in detail below with reference to the specific embodiments and the accompanying drawings.

This embodiment relates to a new fan, includes:

a casing 10, on which a fresh air inlet 101 and a fresh air outlet 102 are arranged;

the separating plate 103 is vertically arranged in the machine shell 10, the separating plate 103 divides the inner space of the machine shell 10 into a first cavity 104 and a second cavity 105, the first cavity 104 is communicated with the fresh air inlet 101, the second cavity 105 is communicated with the fresh air outlet 102, and the separating plate 103 is provided with a vent 1031 communicated with the first cavity 104 and the second cavity 105;

the fan 30 is arranged in the first cavity 104, and an air outlet of the fan 30 is arranged on the partition plate 103 corresponding to the vent 1031;

and the electric heating assembly 60 is arranged in the second cavity 105 and is used for heating the air flowing out from the air outlet of the fan 30.

This technical scheme is through being equipped with electric heating element 60 between the air outlet of fan 30 and new trend air outlet 102, when outdoor air is below zero, start electric heating element 60, heat the air that flows out from the air outlet of fan 30, the air after the heating flows into to indoor environment through new trend air outlet 102, outdoor air is to indoor ambient temperature's influence when having avoided using new fan winter, user's experience has been improved and use cost has been reduced.

In the new blower provided by this embodiment, referring to fig. 1 and fig. 2, the new blower includes: the air conditioner comprises a machine shell 10, a filter screen 20, a fan 30, a sound insulation box 40, an electrical box 50 and an electric heating assembly 60, wherein the filter screen 20, the fan 30, the sound insulation box 40, the electrical box 50 and the electric heating assembly 60 are all arranged in the machine shell 10. The new fan is a suspension type new fan in this embodiment.

Referring to fig. 1, 2 and 3, the casing 10 is formed by connecting a front panel 15, a bottom panel 12, a top panel 11, a back panel 16, a first side panel 13 and a second side panel 14, and the casing 10 is formed in a rectangular parallelepiped shape. In order to adapt to more installation environments and facilitate installation of the fresh air fan, the casing 10 is designed to be small-sized in the implementation, and the casing 10 is of a detachable structure for maintenance. The front panel 15 of the casing 10 is provided with a first lifting lug 151, the rear panel 16 of the casing 10 is provided with a second lifting lug 162, and the fresh air fan is lifted in the installation space through the first lifting lug 151 and the second lifting lug 162. The casing 10 is provided with a fresh air inlet 101 and a fresh air outlet 102, specifically, the back plate 16 of the casing 10 is provided with the fresh air inlet 101, the front plate 15 of the casing 10 is provided with the fresh air outlet 102, and the outdoor air enters the casing 10 through the fresh air inlet 101 to be subjected to a series of treatments and then is discharged to the indoor environment through the fresh air outlet 102.

Referring to fig. 2, in this embodiment, the casing 10 is further provided with a partition plate 103, the partition plate 103 is vertically disposed in the casing 10, two sides of the partition plate 103 extend to the first side plate 13 and the second side plate 14 of the casing 10, the partition plate 103 divides the internal space of the casing 10 into a first cavity 104 and a second cavity 105, the first cavity 104 is communicated with the fresh air inlet 101, the first cavity 104 is communicated with the fresh air outlet 102, and the partition plate 103 is provided with vent holes 1031 respectively communicated with the first cavity 104 and the second cavity 105. In this embodiment, the first cavity 104 and the second cavity 105 are substantially rectangular, and in order to facilitate the installation of devices in the fresh air machine, the length of the first cavity 104 is greater than that of the second cavity 105.

With continued reference to fig. 2, the fan 30 is used to introduce outdoor air from the fresh air inlet 101 into the fresh air outlet 102. Specifically, the fan 30 is disposed in the first cavity 104, the fan 30 has an air inlet 31 and an air outlet, the air inlet 31 of the fan 30 is communicated with the air outlet of the fan 30, the air inlet 31 of the fan 30 is further communicated with the first cavity 104, and the air outlet of the fan 30 is disposed on the partition plate 103 corresponding to the vent 1031. More specifically, the orientation of the air inlet 31 of the blower 30 may be set according to actual needs, and the embodiment is not particularly limited. For example, the air inlet of the fan 30 may be disposed toward the bottom plate 12 of the cabinet 10. The air outlet of the fan 30 is detachably connected with the partition plate 103, and the air outlet of the fan 30 can be detachably connected with the partition plate 103 through screws. In this embodiment, the fan 30 has a high rotation speed and a large diameter to increase the air output of the fresh air fan.

The electric heating unit 60 is used to heat the air flowing out from the air outlet of the blower 30. Referring to fig. 2, 5, 6 and 7, the electric heating assembly 60 is disposed in the second cavity 105, and specifically, the electric heating assembly 60 includes a first supporting plate 61, a second supporting plate 62 and a heating plate 63, wherein the first supporting plate 61 is disposed on the first side plate 13 of the casing 10, a first engaging portion 611 is disposed on a top of the first supporting plate 61, the second supporting plate 62 is disposed on the second side plate 14 of the casing 10, a second engaging portion 621 is disposed on a top of the second supporting plate 62, one end of a top of the heating plate 63 is engaged with the first engaging portion 611, and the other end of the top of the heating plate 63 is engaged with the second engaging portion 621, so that the heating plate 63 is respectively engaged with the first supporting plate 61 and the second supporting plate 62. First backup pad 61 and second backup pad 62 all are the setting of door font, and one side accessible welding or screw etc. of first backup pad 61 and the inner wall connection of first curb plate 13, one side accessible welding or screw etc. of second backup pad 62 and the inner wall connection of second curb plate 14, first block portion 611 and second block portion 621 all are the setting of L type. The present embodiment supports the heating plate 63 through the first and second support plates 61 and 62 to improve stability in operation of the heating plate 63 and to facilitate detachment and installation of the heating plate 63.

In this embodiment, to further facilitate the installation of the heating plate 63, the first support plate 61 and the second support plate 62 are symmetrically disposed with respect to a central line connecting the front panel 15 and the back panel 16 of the cabinet 10.

In this embodiment, the electric heating assembly 60 further includes: first fixed plate 64 and second fixed plate 65, wherein, first fixed plate 64 is formed with first draw-in groove, and the bottom one end of the bottom of the hot plate 63 that is close to first curb plate 13 and the bottom of first backup pad 61 are for being arranged in first draw-in groove, and second fixed plate 65 is formed with the second draw-in groove, and the bottom other end of the bottom of the hot plate 63 that is close to second curb plate 14 and the bottom of second backup pad 62 all are arranged in the second draw-in groove. This embodiment is through being equipped with the bottom of hot plate 63 and the bottom of first backup pad 61 matched with first fixed plate 64 to be equipped with the bottom of hot plate 63 and the bottom of second backup pad 62 matched with second fixed plate 65, with support hot plate 63, further improved the stability of hot plate 63 work.

In this embodiment, in order to further facilitate the detachment and installation of the heating plate 63, the first engaging groove is fastened and connected to the first supporting plate 61 by screws, and the second engaging groove is fastened and connected to the second supporting plate 62 by screws. When needs maintenance hot plate 63, only need to dismantle bottom plate 12 of casing 10, through dismantling the screw of fastening first draw-in groove and first backup pad 61 and second draw-in groove and second backup pad 62, can realize hot plate 63's dismantlement, and need not to dismantle whole new fan, improved the work efficiency of maintenance and improved user's experience.

In this embodiment, the bottom of the first supporting plate 61 is provided with a first limiting portion 612 on the same side as the first engaging portion 611, the first limiting portion 612 is located below the first fixing plate 64, the bottom of the second supporting plate 62 is provided with a second limiting portion 622 on the same side as the second engaging portion 621, the second limiting portion 622 is located below the second fixing plate 65, the first limiting portion 612 and the second limiting portion 622 are both L-shaped, and the first limiting portion 612 and the second limiting portion 622 are both provided with a notch, so that the first fixing plate 64 and the second fixing plate 65 can pass through the corresponding notches to be fastened and connected with the corresponding first supporting plate 61 or second supporting plate 62. Through setting up first spacing portion 612 and the spacing portion 622 of second in this embodiment, when dismantling first fixed plate 64 and second fixed plate 65, prevent that hot plate 63 from dropping suddenly, improved the security to when installation hot plate 63, if need get mounting tool, also can support hot plate 63 through first spacing portion 612 and the spacing portion 622 of second, made things convenient for user's use.

The sound muffling box 40 is for absorbing noise generated by the fan 30. Referring to fig. 2 and 4, the sound muffling box 40 is disposed within the second cavity 105. The sound attenuation box 40 is roughly in a cuboid, a first through hole 42 is formed in one side of the sound attenuation box 40 corresponding to the vent 1031, a second through hole 43 is formed in the other side of the sound attenuation box 40 corresponding to the fresh air outlet 102, the first through hole 42 is communicated with the second through hole 43, and the sound attenuation cotton 41 is arranged on the peripheral inner wall of the sound attenuation box 40. In this embodiment, the electric heating element 60 is disposed in the sound muffling box 40, specifically, when the electric heating element 60 is located in the sound muffling box 40, the first supporting plate 61 is fastened to one side plate of the sound muffling box 40, and can be fastened by screws or welding, the second supporting plate 62 is fastened to the other side plate of the sound muffling box 40, and in this embodiment, more specifically, the sound muffling cotton 41 is attached to the peripheral inner wall of the sound muffling box 40. The sound muffling box 40 is communicated with the first cavity 104 and the second cavity 105 through the first through hole 42 and the second through hole 43. The sound reducing box 40 is tightly attached to the inner wall of the second cavity 105, so that gaps between the sound reducing box 40 and the second cavity 105 are reduced, and the noise reduction effect of the fresh air machine is further improved.

The filter screen 20 is used for filtering impurities in the outdoor air flowing in from the fresh air inlet 101. Referring to fig. 1, specifically, the filter screen 20 is vertically disposed in the first cavity 104 toward the fresh air inlet 101, two sides of the filter screen 20 extend toward the first side plate 13 and the second side plate 14 of the casing 10, and the filter screen 20 is located between the fresh air inlet 101 and the fan 30, so as to improve the filtering effect of the filter screen 20.

In this embodiment, referring to fig. 1 and 3, a cover plate 17 is disposed at the bottom of the casing 10 and is parallel to the bottom plate 12 of the casing 10, the cover plate 17 corresponds to the filter screen 20, and one end of the cover plate 17 is movably connected to the bottom plate 12 of the casing 10, and by disposing the cover plate 17, when the filter screen 20 needs to be replaced, the cover plate 17 is opened to facilitate replacement of the filter screen 20. Wherein, the one end of apron 17 passes through hinge and the bottom plate 12 swing joint of casing 10, and the both ends of the backplate 16 of casing 10 all are equipped with a hasp 161, and the both sides of the other end of apron 17 all are equipped with a latch hook 171, and hasp 161 block is on corresponding latch hook 171. When it is desired to open the cover 17, the latch hook 171 is depressed to disengage the catch 161 from the latch hook 171. The embodiment ensures the sealing performance when the cover plate 17 is in a closed state, is convenient for opening and closing the cover plate 17, and improves the convenience of users.

Referring to fig. 2, the electrical box 50 is vertically disposed in the cabinet 10, and the electrical box 50 is connected to the blower 30. Specifically, the electrical box 50 is disposed in the first cavity 104, and the electrical box 50 is disposed along the width direction of the casing 10 and parallel to the blower 30.

In the new air blower provided by this embodiment, referring to fig. 1, 8, 9 and 10, the installation and removal processes of the heating plate 63 are as follows:

installation step of the heating plate 63: the bottom plate 12 is removed and the top end of the heating plate 63 is engaged with the first engaging portion 611 of the first support plate 61 and the second engaging portion 621 of the second support plate 62 (see fig. 8-9); rotating the heating plate 63 to make the heating plate 63 fit with the first support plate 61 and the second support plate 62 (see fig. 9-10); then, the first fixing plate 64 is clamped at one end of the bottom of the heating plate 63 and the bottom end of the first supporting plate 61, the first fixing plate 64 and the first supporting plate 61 are fastened and connected through screws, the second fixing plate 65 is clamped at the other end of the bottom of the heating plate 63 and the bottom end of the second supporting plate 62, and the second fixing plate 65 and the second supporting plate 62 are fastened and connected through screws, so that the heating plate 63 is disposed in the second cavity 105 (see fig. 10-1).

When the heating plate 63 needs to be maintained after sale, the bottom plate 12 is detached and taken out, the screws of the first fixing plate 64 and the first support plate 61, the screws of the second fixing plate 65 and the screws of the second support plate 62 are detached and taken out by using a detaching tool, the first fixing plate 64 and the first support plate 61 are separated, the first fixing plate 64 and the second support plate 62 are separated, and then the heating plate 63 is separated from the first clamping part 611 and the second clamping part 621, so that the heating plate 63 is detached.

The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention in other forms, and any person skilled in the art may apply the above modifications or changes to the equivalent embodiments with equivalent changes, without departing from the technical spirit of the present invention, and any simple modification, equivalent change and change made to the above embodiments according to the technical spirit of the present invention still belong to the protection scope of the technical spirit of the present invention.

Claims (10)

1. A new fan, comprising:

the fresh air inlet and the fresh air outlet are arranged on the shell;

the partition plate is vertically arranged in the shell, the partition plate divides the inner space of the shell into a first cavity and a second cavity, the first cavity is communicated with the fresh air inlet, the second cavity is communicated with the fresh air outlet, and the partition plate is provided with a vent hole communicated with the first cavity and the second cavity;

the fan is arranged in the first cavity, and an air outlet of the fan is arranged on the partition plate corresponding to the vent hole;

and the electric heating assembly is arranged in the second cavity and used for heating the air flowing out from the air outlet of the fan.

2. The new fan of claim 1, wherein the electrical heating assembly comprises:

the first supporting plate is arranged on the first side plate of the shell, and a first clamping part is arranged at the top of the first supporting plate;

the second supporting plate is arranged on a second side plate of the shell, and a second clamping part is arranged at the top of the second supporting plate;

and one end of the top of the heating plate is clamped in the first clamping part, and the other end of the top of the heating plate is clamped in the second clamping part, so that the heating plate is respectively attached to the first supporting plate and the second supporting plate.

3. The new fan of claim 2, wherein the electrical heating assembly further comprises:

the first fixing plate is provided with a first clamping groove, and one end, close to the bottom of the heating plate, of the first side plate and the bottom of the first supporting plate are both positioned in the first clamping groove;

and the second fixing plate is provided with a second clamping groove, and the other end of the bottom of the heating plate close to the second side plate and the bottom of the second supporting plate are both positioned in the second clamping groove.

4. The fresh air machine of claim 3, wherein the first clamping groove and the first support plate and the second clamping groove and the second support plate are fixedly connected through screws.

5. The fresh air machine as claimed in claim 3 or 4, wherein a first limiting part is arranged at the bottom of the first supporting plate and on the same side as the first clamping part, and the first limiting part is located below the first fixing plate;

the bottom of the second supporting plate is provided with a second limiting part which is located on the same side as the second clamping part, and the second limiting part is located below the second fixing plate.

6. The new fan according to claim 1, characterized in that a sound deadening box is arranged in the second cavity, sound deadening cotton is arranged on the peripheral inner wall of the sound deadening box, and the electric heating assembly is arranged in the sound deadening box.

7. The new fan of claim 6, wherein the silencing cotton is adhered to the peripheral inner wall of the silencing box.

8. The new fan of claim 2, wherein the housing is rectangular parallelepiped.

9. The fresh air machine of claim 8 wherein the first support plate and the second support plate are symmetrically disposed about a line connecting centers of the front panel and the back panel of the cabinet.

10. The new fan of claim 1, wherein a filter screen is vertically disposed in the first cavity, and the filter screen is located between the new air inlet and the fan, and is configured to filter out impurities in the outdoor air flowing in from the new air inlet.

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