CN215523623U

CN215523623U - New fan

Info

Publication number: CN215523623U
Application number: CN202122210799.5U
Authority: CN
Inventors: 王秀瑞; 陈超
Original assignee: Hisense Shandong Air Conditioning Co Ltd
Current assignee: Hisense Shandong Air Conditioning Co Ltd
Priority date: 2021-09-13
Filing date: 2021-09-13
Publication date: 2022-01-14
Anticipated expiration: 2031-09-13

Abstract

The utility model provides a new fan, which comprises a shell, an electrical box, an air valve mechanism and a fan, wherein the shell is provided with a new air duct, the new air duct is provided with a new air inlet and a new air outlet which are communicated with the new air duct, and the fan is arranged in the new air duct so as to introduce outdoor air into the new air duct from the new air inlet; in new trend wind channel was located to blast gate mechanism, and blast gate mechanism was located new trend air intake department, blast gate mechanism included: the fixed support is connected with the shell and is provided with a vent corresponding to the fresh air inlet; the driving motor is arranged on the fixed bracket, and the driving end of the driving motor is connected with a rotating rod; the air plate is rotatably arranged in the ventilation opening and is connected to the rotating rod; according to the novel fan provided by the utility model, when the ventilation opening is closed by the air plate, outdoor air can be effectively prevented from entering the shell through the air inlet pipe, noise is avoided, and the use comfort of a user is improved.

Description

New fan

Technical Field

The utility model belongs to the technical field of air conditioning, 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 indoor environment air quality. At present, in order to introduce outdoor air into an indoor environment through a fresh air machine in an existing fresh air machine, an opening is generally formed in a wall, one end of an air inlet pipe is communicated with the fresh air machine, and the other end of the air inlet pipe penetrates through the opening to be communicated with the outdoor environment. However, when the new air blower stops working and the outdoor environment is in a windy weather, the air inlet pipe is opened, the windy wind can cause airflow disturbance in the air inlet pipe, and the airflow impacts the air inlet pipe and the casing of the new air blower to generate larger noise, so that the comfort of users is seriously affected.

Disclosure of Invention

The utility model aims to provide a fresh air fan to solve the technical problems that in the prior art, the fresh air fan is used in windy weather, so that large noise is generated, and the use comfort of a user is influenced.

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

a new fan, comprising:

the fresh air channel is formed in the shell, a fresh air inlet and a fresh air outlet which are communicated with the fresh air channel are arranged on the shell, and a fan is arranged in the fresh air channel so as to introduce outdoor air into the fresh air channel from the fresh air inlet;

blast gate mechanism, it is located in the new trend wind channel, and blast gate mechanism is located new trend air intake department, and blast gate mechanism includes:

the fixed support is connected with the shell and is provided with a vent corresponding to the fresh air inlet;

the driving motor is arranged on the fixed bracket, and the driving end of the driving motor is connected with a rotating rod;

the aerofoil is arranged in the ventilation opening in a rotating mode and connected to the rotating rod, and the rotating rod drives the aerofoil to rotate so that the fresh air inlet is opened or closed under the driving of the driving motor.

According to the technical scheme, the air valve mechanism comprising the fixed support, the driving motor, the rotating rod and the air plate is arranged, when the fresh air fan is not used, the driving motor drives the rotating rod to rotate and drives the air plate to rotate so as to close the fresh air inlet; when the fresh air fan is used, the fresh air inlet is opened by rotating the air plate. When the new trend air intake is closed to the aerofoil, can effectually prevent that outdoor air from passing through the air-supply line and entering into the casing in, avoid the production of noise, improved the comfort that the user used.

In some embodiments of the present application, a sealing strip which is in sealing fit with the wind plate is arranged on the inner wall of the fixing support.

Through being equipped with on the inner wall at the fixed bolster among this technical scheme with the sealing strip of the sealed complex of aerofoil, when the new trend air intake was closed to the aerofoil, improved the leakproofness that the new trend air intake was closed to the aerofoil, further avoided the production of noise, improved the comfort that the user used.

In some embodiments of the present application, the damper includes a first body portion and a second body portion, and the first body portion and the second body portion are disposed offset with respect to the rotating rod;

the sealing strip includes the first protruding muscle and the protruding muscle of second of staggered arrangement, and when the vent was closed to the aerofoil, first main part offseted with first protruding muscle, and the second main part offsets with the protruding muscle of second.

Through setting up the aerofoil including first main part and second main part among this technical scheme to and including the sealing strip of first protruding muscle and the protruding muscle of second, when the new trend air intake is closed to the aerofoil, first main part offsets with first protruding muscle, and the second main part offsets with the protruding muscle of second, has restricted the displacement of first main part and second main part, and has further improved the leakproofness that the new trend air intake was closed to the aerofoil, has avoided the production of noise, has improved the comfort that the user used.

In some embodiments of the present application, a first protrusion is disposed on the first rib, a second protrusion is disposed on the second rib, and a first insertion groove and a second insertion groove are disposed on the inner wall of the fixing bracket.

Through be equipped with in the inside of fixed bolster among this technical scheme with first protruding matched with first inserting groove on the first protruding muscle to and with the second inserting groove of second protruding looks complex on the second protruding muscle, so that the installation of first protruding muscle and second protruding muscle has improved assembly speed.

In some embodiments of this application, new trend air inlet department is connected with the air inlet flange, and new trend air outlet department is connected with the air outlet flange, and the air inlet flange is the coned flange with the air outlet flange.

In some embodiments of the present application, a surface of the fixing bracket is provided with a hook, a first mounting hole is formed in the casing corresponding to the hook, a second mounting hole is formed in the air inlet flange corresponding to the first mounting hole, a clamping groove adjacent to the second mounting hole in the circumferential direction is further formed in the air inlet flange, and the hook penetrates through the first mounting hole and the second mounting hole and is clamped in the clamping groove.

Through being equipped with the trip on the fixed bolster among this technical scheme, being equipped with first mounting hole on the casing and being equipped with second mounting hole and draw-in groove on the air inlet flange, the trip passes first mounting hole and second mounting hole and joint in the draw-in groove to the fast assembly of fixed bolster and air inlet flange has further improved assembly speed.

In some embodiments of the present application, the hooks are multiple, the hooks are uniformly distributed on a surface of the fixing bracket, and the first mounting hole, the second mounting hole and the slot are all consistent with the hooks.

In some embodiments of the present application, the top end of the fixing bracket is provided with a mounting seat, and the driving motor is fastened and connected with the mounting seat through a screw.

In some embodiments of the present application, a filter screen is further disposed in the fresh air duct, and the filter screen is located between the air valve mechanism and the fan, and is used for filtering impurities in outdoor air flowing from the fresh air inlet.

In some embodiments of the present application, the air plates are arranged in a circular plate shape.

Drawings

Fig. 1 is a schematic view of an overall structure of a new air blower with an air inlet flange and a new air flange removed according to an embodiment of the present invention;

FIG. 2 is a left side view of FIG. 1 with the damper open according to an embodiment of the present invention;

FIG. 3 is a left side view of FIG. 1 with the damper closed according to an embodiment of the present invention;

FIG. 4 is a right side view of FIG. 1 provided in accordance with an embodiment of the present invention;

FIG. 5 is a schematic diagram of an internal structure of a fresh air machine according to an embodiment of the present invention

FIG. 6 is a schematic structural diagram of an air valve mechanism provided in an embodiment of the present invention;

FIG. 7 is an assembly view of the air valve mechanism, the backplate, and the air inlet flange according to the embodiment of the present invention;

FIG. 8 is a cross-sectional view of portion A of FIG. 7 according to an embodiment of the present invention;

FIG. 9 is a schematic structural diagram of a fixing bracket according to an embodiment of the present invention;

fig. 10 is a schematic structural view of a rotating rod and a wind plate according to an embodiment of the present invention;

FIG. 11 is a cross-sectional view taken along line A-A of FIG. 10 in accordance with an embodiment of the present invention;

FIG. 12 is a first schematic view of the assembly of the damper mechanism according to the embodiment of the present invention;

FIG. 13 is a second schematic view of the assembly of the damper mechanism according to the embodiment of the present invention;

in the above figures:

10. a housing; 11. a base plate; 12. a top 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. a second lifting lug; 162. a first mounting hole; 17. a fresh air inlet; 171. an air inlet flange; 172. a second mounting hole; 173. a card slot; 18. a fresh air outlet; 181. an air outlet flange; 19. a fan mounting plate; 191. a through hole; 20. a filter screen; 30. a fan; 40. An electrical box; 50. an air valve mechanism; 51. fixing a bracket; 511. a first fixing surface; 512. a second stationary surface; 513. a third fixing surface; 514. a vent; 515. a first insertion groove; 516. a second insertion groove; 517. A hook is clamped; 518. a mounting seat; 519. a first mounting port; 5010. a second mounting opening; 52. a drive motor; 53. rotating the rod; 54. a wind plate; 541. a first main body portion; 542. a second main body portion; 55. a sealing strip; 551. a first rib; 552. a second rib; 553. a first protrusion; 554. a second protrusion.

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 that in the prior art, when the fresh air fan is used in windy weather, the noise is large and the use comfort of a user is influenced, 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 fresh air duct is formed in the casing 10, a fresh air inlet 17 and a fresh air outlet 18 which are communicated with the fresh air duct are arranged on the casing 10, and a fan 30 is arranged in the fresh air duct to introduce outdoor air into the fresh air duct from the fresh air inlet 17;

blast gate mechanism 50, it is located in the new trend wind channel, and blast gate mechanism 50 is located new trend air intake 17 department, and blast gate mechanism 50 includes:

the fixed support 51 is connected with the machine shell 10, and the fixed support 51 is provided with a vent 514 corresponding to the fresh air inlet 17;

a driving motor 52, which is arranged on the fixed bracket 51, and the driving end of the driving motor 52 is connected with a rotating rod 53;

the air plate 54 is rotatably disposed in the ventilation opening 514, and the air plate 54 is connected to the rotating rod 53, and under the driving of the driving motor 52, the rotating rod 53 drives the air plate 54 to rotate so as to open or close the fresh air inlet 17.

According to the fresh air fan provided by the embodiment, the air valve mechanism 50 comprising the fixed bracket 51, the driving motor 52, the rotating rod 53 and the air plate 54 is arranged, so that when the fresh air fan is not used, the rotating rod 53 is driven to rotate by the driving motor 52, and the air plate 54 is driven to rotate so as to close the fresh air inlet 17; when the fresh air blower is used, the fresh air inlet 17 is opened by rotating the air plate 54. When the air plate 54 closes the fresh air inlet 17, the outdoor air can be effectively prevented from entering the casing 10 through the air inlet pipe, so that the noise is avoided, and the comfort of the user is improved.

In the new blower provided by this embodiment, referring to fig. 1 and fig. 5, the new blower includes: the air valve device comprises a machine shell 10, a filter screen 20, a fan 30, an electrical box 40 and an air valve mechanism 50, wherein the filter screen 20, the fan 30, the electrical box 40 and the air valve mechanism 50 are all arranged in the machine shell 10. The new fan in this embodiment is a suspension type new fan.

Referring to fig. 1 to 5, the casing 10 is formed by connecting a front panel 15, a bottom panel 11, a top panel 12, a rear back panel 16, a first side panel 13 and a second side panel 14, and the casing 10 is rectangular. Wherein, for the convenience of maintenance, the housing 10 is provided as a detachable structure in this embodiment. Be equipped with first lug 151 on the front panel 15 of casing 10, the quantity of first lug 151 is two, and two first lugs 151 symmetry setting on the front panel 15 of casing 10 are equipped with second lug 161 on the backplate 16 of casing 10, and the quantity of second lug 161 is two, and two second lugs 161 symmetry setting on the backplate 16 of casing 10, hoist new fan in the installation space through first lug 151 and second lug 161. The inside of the casing 10 is provided with a fresh air duct, the casing 10 is provided with a fresh air inlet 17 and a fresh air outlet 18, the fresh air duct is communicated with the fresh air inlet 17 and the fresh air outlet 18, specifically, the rear back plate 16 of the casing 10 is provided with the fresh air inlet 17, the front panel 15 of the casing 10 is provided with the fresh air outlet 18, and the outdoor air enters the casing 10 through the fresh air inlet 17 to be processed in a series and then is discharged to the indoor environment through the fresh air outlet 18. More specifically, the fresh air inlet 17 is connected with an air inlet flange 171, the fresh air outlet 18 is connected with an air outlet flange 181, and the air inlet flange 171 and the air outlet flange 181 are both conical flanges.

Referring to fig. 5, a fan mounting plate 19 is vertically disposed in the casing 10, two sides of the fan mounting plate 19 extend to the first side plate 13 and the second side plate 14 of the casing 10, the fan 30 is mounted on the fan mounting plate 19, and a through hole 191 for communicating the fresh air inlet 17 and the fresh air outlet 18 is disposed on the fan mounting plate 19.

With continued reference to fig. 5, the blower 30 is used to introduce outdoor air from the fresh air inlet 17 to the fresh air outlet 18. Specifically, the fan 30 is disposed in the fresh air duct. The fan 30 is provided with an air outlet and an air inlet, the air outlet of the fan 30 is arranged corresponding to the through hole 191 on the fan mounting plate 19, the air outlet of the fan 30 is fixedly connected with the fan mounting plate 19, and the air outlet of the fan 30 can be fixedly connected with the fan mounting plate 19 through a screw. The orientation of the air inlet of the fan 30 can be set according to actual needs, for example, the air inlet of the fan 30 can be set towards the bottom plate 11 of the casing 10.

With continued reference to fig. 5, the filter net 20 is used to filter impurities of the outdoor air flowing in from the fresh air intake 17. Specifically, the filter screen 20 is vertically arranged in the casing 10 towards the fresh air inlet 17, and two sides of the filter screen 20 extend towards the first side plate 13 and the second side plate 14 of the casing 10, so as to improve the filtering effect of the filter screen 20. More specifically, the filter screen 20 is located between the damper mechanism 50 and the fan 30.

With continued reference to fig. 5, the electrical box 40 is vertically disposed in the cabinet 10, and the electrical box 40 is connected to the blower 30 and the damper mechanism 50, respectively. Specifically, the electrical box 40 is disposed side by side with the blower fan 30 in the width direction of the cabinet 10.

The air valve mechanism 50 is used for opening or closing the fresh air inlet 17. Referring to fig. 2 to 9, the air valve mechanism 50 is disposed in the fresh air duct, and the air valve mechanism 50 is located at the fresh air inlet 17, and the air valve mechanism 50 includes: the air conditioner comprises a fixed support 51, a driving motor 52 and a wind plate 54, wherein the fixed support 51 is connected with the machine shell 10, specifically, the fixed support 51 is connected with the back plate 16 of the machine shell 10, a vent 514 corresponding to the fresh air inlet 17 is arranged on the fixed support 51, the driving motor 52 is arranged on the fixed support 51, the electrical box 40 is connected with the non-driving end of the driving motor 52, the driving end of the driving motor 52 is connected with a rotating rod 53, the wind plate 54 is rotatably arranged in the vent 514, the wind plate 54 is connected on the rotating rod 53, and under the driving of the driving motor 52, the rotating rod 53 drives the wind plate 54 to rotate so as to open or close the fresh air inlet 17. In this embodiment, the fixing bracket 51 has a first fixing surface 511, a second fixing surface 512 and a third fixing surface 513, wherein a first end of the first fixing surface 511 is connected to a first end of the third fixing surface 513, a first end of the second fixing surface 512 is connected to a second end of the third fixing surface 513, and the third fixing surface 513 is circular. In the present embodiment, the wind plate 54 has a disc shape. In this embodiment, when the fresh air blower is not used, the driving motor 52 drives the rotating rod 53 to rotate, and drives the air plate 54 to rotate so that the air plate 54 closes the ventilation opening 514, thereby closing the fresh air inlet 17; when the fresh air fan is used, the ventilation opening 514 is opened by rotating the air plate 54 to make the air plate 54 perpendicular to the fixed support 51, so that the fresh air inlet 17 is opened, and the outdoor air flows into the fresh air duct through the fresh air inlet 17 and the ventilation opening 514. When the air plate 54 closes the fresh air inlet 17, the outdoor air can be effectively prevented from entering the casing 10 through the air inlet pipe, so that the noise is avoided, and the comfort of the user is improved.

Referring to fig. 9, in the present embodiment, a top end of the third fixing surface 513 of the fixing bracket 51 is provided with a first mounting hole 519, a bottom end of the third fixing surface 513 is provided with a second mounting hole 5010, a top end of the rotating rod 53 is rotatably disposed in the first mounting hole 519 and connected to a driving end of the driving motor 52, and a bottom end of the rotating rod 53 is rotatably disposed in the second mounting hole 5010.

With reference to fig. 9, when the air plate 54 closes the fresh air inlet 17, in order to improve the sealing performance of the air plate 54 for closing the fresh air inlet 17, further avoid the generation of noise, and improve the comfort of the user, in this embodiment, a sealing strip 55 is disposed on the inner wall of the fixing bracket 51, and when the air plate 54 closes the fresh air inlet 17, the air plate 54 is in sealing fit with the sealing strip 55.

Referring to fig. 10 and 11, in this embodiment, the wind plate 54 includes a first main body 541 and a second main body 542, and the first main body 541 and the second main body 542 are disposed in a staggered manner with respect to the rotating rod 53, the sealing strip 55 includes a first rib 551 and a second rib 552 disposed in a staggered manner, the first rib 551 is matched with the first main body 541, the second rib 552 is matched with the second main body 542, when the wind plate 54 closes the fresh air inlet 17, the first main body 541 is abutted against the first rib 551, and the second main body 542 is abutted against the second rib 552. The first body 541 and the second body 542 are both semicircular plates, the first body 541 and the second body 542 have the same shape and size, and the first body 541 and the second body 542 are symmetrical about the rotating rod 53 in the same plane space. Also, in the same plane space, the first rib 551 and the second rib 552 are symmetrical with respect to an axis between the top end and the bottom end of the third fixing surface 513. In this embodiment, when the air flap 54 closes the fresh air inlet 17, the first main body 541 abuts against the first rib 551, and the second main body 542 abuts against the second rib 552, so as to limit the displacement of the first main body 541 and the second main body, further improve the sealing performance of the air flap 54 for closing the fresh air inlet 17, avoid the generation of noise, and improve the comfort of the user.

Referring to fig. 6, 7 and 9, in order to facilitate the installation of the first rib 551 and the second rib 552 and increase the assembling speed, in this embodiment, a first protrusion 553 is disposed on the first rib 551, a second protrusion 554 is disposed on the second rib 552, and a first insertion groove 515 engaged with the first protrusion 553 and a second insertion groove 516 engaged with the second protrusion 554 are disposed on the inner wall of the fixing bracket 51. The first projection 553 is inserted into the first insertion groove 515, and the second projection 554 is inserted into the second insertion groove 516. The first insertion groove 515 and the second insertion groove 516 extend in the width direction of the third fixing surface 513, and the width of the first projection 553 is identical to the width of the first insertion groove 515, and the width of the second projection 554 is identical to the width of the second insertion groove 516. In this embodiment, in order to improve the mounting stability of the first rib 551 and the second rib 552, the first protrusions 553 are disposed at both ends of the first rib 551, and similarly, the second protrusions 554 are disposed at the middle positions of the second rib 552.

Referring to fig. 7, in the present embodiment, a hook 517 is provided on one surface of the fixing bracket 51, and specifically, a hook 517 is provided on one surface of the fixing bracket 51 adjacent to the back plate 16 of the casing 10. The housing 10 is provided with a first mounting hole 162 corresponding to the hook 517, and specifically, the back plate 16 of the housing 10 is provided with a first mounting hole 162 corresponding to the hook 517. The air inlet flange 171 is provided with a second mounting hole 172 corresponding to the first mounting hole 162, and the air inlet flange 171 is provided with a clamping groove 173 adjacent to the second mounting hole 172 in the circumferential direction, and the clamping hook 517 penetrates through the first mounting hole 162 and the second mounting hole 172 and is clamped in the clamping groove 173. The locking groove 173 in this embodiment has an anti-releasing structure. This embodiment facilitates the quick assembly of the fixing bracket 51 and the air intake flange 171, further improving the assembly speed.

With reference to fig. 7, in order to improve the stability of the fixing bracket 51, in the embodiment, a plurality of hooks 517 are provided, the plurality of hooks 517 are uniformly distributed on a surface of the fixing bracket 51, and the number of the first mounting holes 162, the number of the second mounting holes 172, and the number of the slots 173 are the same as the number of the hooks 517. In this embodiment, the number of the hooks 517, the first mounting holes 162, the second mounting holes 172, and the slots 173 is three. Each hook 517 passes through the corresponding first mounting hole 162 and the second mounting hole 172 to be clipped in the corresponding clipping slot 173.

In the new blower provided in this embodiment, the assembling process of the fixing bracket 51 is as follows:

during assembly, referring to fig. 12, first, according to the positions of the three hooks 517 and the positions of the three first mounting holes 162 on the fixing plate, the front panel 15 of the casing 10 is placed on the fixing bracket 51, then, according to the positions of the three second mounting holes 172 on the air inlet flange 171, the air inlet flange 171 is placed on the back panel 16 of the casing 10, so that the hooks 517 sequentially pass through the first mounting holes 162 and the second mounting holes 172, the air inlet flange 171 is rotated counterclockwise according to the arrow direction in fig. 12, referring to fig. 13, so that the three hooks 517 are locked in the locking grooves 173 of the corresponding air outlet flange 181, and thus, the fixing bracket 51 and the air inlet flange 171 are assembled.

Referring to fig. 6, 7 and 9, in the present embodiment, in order to implement the installation of the driving motor 52, two installation seats 518 are provided at the top end of the fixing bracket 51, and the driving motor 52 is respectively fastened and connected with the two installation seats 518 through screws.

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

1. A new fan, comprising:

the fresh air channel is internally provided with a fresh air inlet and a fresh air outlet which are communicated with the fresh air channel, and the fresh air channel is internally provided with a fan so as to introduce outdoor air into the fresh air channel from the fresh air inlet;

blast gate mechanism, it is located in the new trend wind channel, just blast gate mechanism is located new trend air intake department, blast gate mechanism includes:

the aerofoil, its rotation is located in the vent, just the aerofoil connect in on the rotary rod under driving motor's drive, the rotary rod drives the aerofoil is rotatory so that the new trend air intake is opened or is closed.

2. The new fan of claim 1, characterized in that the inner wall of the fixed bracket is provided with a sealing strip which is in sealing fit with the air plate.

3. The new fan of claim 2, wherein the damper includes a first body portion and a second body portion, and the first body portion and the second body portion are staggered with respect to the rotating rod;

the sealing strip includes the first protruding muscle and the protruding muscle of second of staggered arrangement, works as the aerofoil closes when the new trend air intake, first main part with first protruding muscle offsets, the second main part with the protruding muscle of second offsets.

4. The fresh air machine as claimed in claim 3, wherein the first rib is provided with a first protrusion, the second rib is provided with a second protrusion, and the inner wall of the fixing bracket is provided with a first insertion groove matched with the first protrusion and a second insertion groove matched with the second protrusion.

5. The new fan of claim 1, characterized in that an air inlet flange is connected to the new air inlet, an air outlet flange is connected to the new air outlet, and the air inlet flange and the air outlet flange are both conical flanges.

6. The fresh air machine of claim 5 wherein a hook is disposed on a surface of the fixing bracket, a first mounting hole is disposed on the casing corresponding to the hook, a second mounting hole is disposed on the air inlet flange corresponding to the first mounting hole, a slot adjacent to the second mounting hole in the circumferential direction is further disposed on the air inlet flange, and the hook passes through the first mounting hole and the second mounting hole and is engaged with the slot.

7. The new fan of claim 6, wherein the number of the hooks is multiple, the hooks are uniformly distributed on one surface of the fixing bracket, and the number of the first mounting holes, the number of the second mounting holes and the number of the slots are the same as the number of the hooks.

8. The new fan of claim 1, characterized in that, the top of the fixed bracket is provided with a mounting seat, and the driving motor is fixedly connected with the mounting seat through a screw.

9. The new fan according to claim 1, wherein a filter screen is further disposed in the new air duct, and the filter screen is located between the air valve mechanism and the fan and used for filtering impurities in the outdoor air flowing in from the new air inlet.

10. The new fan of claim 1 wherein the damper is in the shape of a disk.