CN215446766U - New fan - Google Patents

Abstract

The utility model provides a new fan, comprising: the fresh air inlet and the fresh air outlet are communicated to form a fresh air duct; prevent flowing backward the valve, locate in the new trend wind channel and be located new trend air intake department, open or close and prevent flowing backward the air valve and make the new trend air intake open or close, include: the sealing plate is connected to the fresh air inlet, a sealing channel penetrating through the sealing plate is arranged on the sealing plate and is communicated with the fresh air channel and the fresh air inlet, sealing ribs arranged along the circumferential direction of the inner circumferential wall of the sealing channel are arranged on the inner circumferential wall of the sealing channel, and sealing grooves are arranged on the side walls of the sealing ribs; the clamping plate is connected to the sealing channel to open or close the sealing channel, a sealing bulge matched with the sealing groove is arranged on the plate surface of the clamping plate, and when the clamping plate closes the sealing channel, the sealing bulge is clamped in the sealing groove and the clamping plate and the sealing groove are sealed; the noise caused by outdoor air entering the fresh air duct through the fresh air inlet can be avoided.

Description

New fan

Technical Field

The utility model belongs to the technical field of fresh air, and particularly relates to a fresh air fan.

Background

The fresh air machine is provided with a fresh air inlet and a fresh air outlet, under the general condition, the fresh air inlet is communicated with the outside directly or through a fresh air inlet pipe and the like, in the windy weather, outdoor air can enter the fresh air duct through the fresh air inlet, air flow disturbance in the fresh air duct can be caused, the disturbance changes along with the change of the outdoor air, the air flow collides back and forth in the fresh air duct, noise which can be launched and bloomed can be sent out, the user experience is seriously influenced, the existing sealing structure is simple, a large gap can be easily formed in the sealing part after long-time use, the outdoor air can enter the fresh air duct through the gap, and therefore, the fresh air machine provided with the anti-backflow air valve at the fresh air inlet is provided.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. For this purpose,

according to an embodiment of the present disclosure, there is provided a new fan including:

the fresh air inlet is communicated with the fresh air outlet to form a fresh air duct;

prevent flowing backward the valve, locate in the new trend wind channel and be located new trend air intake department opens or closes prevent flowing backward the blast valve makes the new trend air intake opens or closes, prevent flowing backward the blast valve and include:

the sealing plate is connected to the fresh air inlet, a sealing channel penetrating through the sealing plate is arranged on the sealing plate and is communicated with the fresh air channel and the fresh air inlet, sealing ribs arranged along the circumferential direction of the inner circumferential wall of the sealing channel are arranged on the inner circumferential wall of the sealing channel, and sealing grooves are arranged on the side walls of the sealing ribs;

the clamping plate is connected with the sealing channel to open or close the sealing channel so that the backflow preventing air valve is opened or closed, a sealing bulge matched with the sealing groove is arranged on the plate surface of the clamping plate, when the clamping plate closes the sealing channel, the sealing bulge is clamped in the sealing groove, and the clamping plate and the sealing groove are sealed.

The setting includes the valve of preventing flowing backward of closing plate and cardboard, it opens and closes sealed passageway and makes the new trend air intake open and close to set up the cardboard, can avoid outdoor wind to enter into the new trend wind channel through the new trend air intake in, the noise that avoids outdoor wind to arouse, improve user experience, be equipped with sealed recess on the lateral wall of the sealed muscle in the sealed passageway, be equipped with on the face of cardboard with the sealed protruding of sealed recess adaptation, when the cardboard closes sealed passageway, sealed protruding card is gone into in the sealed recess and sealed between cardboard and the sealed recess, realize the location when can realizing sealing, strengthen the degree of buckling of sealed department, also can reduce the entering volume of wind when less gap appears in sealed department.

According to the embodiment of the disclosure, the sealing protrusion is provided with the protrusion end wall and the protrusion side wall, the sealing groove is provided with the groove side wall and the groove bottom wall, when the clamping plate closes the sealing channel, the protrusion end wall is abutted against the groove bottom wall and/or the protrusion side wall is abutted against the groove side wall and/or the top of the groove side wall is abutted against the plate surface of the clamping plate, the area of the sealing surface can be increased, the bending degree of the sealing surface is increased, and the sealing effect of the sealing surface is improved.

According to the embodiment of the disclosure, the cardboard is divided into the first cardboard and the second cardboard, the first cardboard and the second cardboard are connected and are arranged in a staggered manner, the sealing ribs comprise the first sealing ribs and the second sealing ribs which are arranged in a staggered manner, when the cardboard closes the sealing channel, the sealing bulges of one of the first cardboard and the second cardboard are clamped into the sealing grooves of the first sealing ribs and sealed between the first cardboard and the sealing grooves, the sealing bulges of the other cardboard are clamped into the sealing grooves of the second sealing ribs and sealed between the second cardboard and the sealing grooves, and the cardboard is suitable for various arrangement conditions of the cardboard.

According to the embodiment of the disclosure, the clamping plate is rotatably connected to the sealing channel, when the clamping plate closes the sealing channel, the sealing bulge on the front side of one of the clamping plates is clamped into the sealing groove on the rear side of one of the sealing ribs and is sealed between the clamping plate and the sealing groove, the sealing bulge on the rear side of the other clamping plate is clamped into the sealing groove on the rear side of the other sealing rib and is sealed between the clamping plate and the sealing groove, and the sealing bulge on the rear side of the other clamping plate is clamped into the sealing groove on the rear side of the other sealing rib and is sealed between the clamping plate and the sealing groove.

According to the embodiment of the disclosure, the sealing bulge is positioned at the outer edge of the plate surface of the clamping plate, the structure is simple, and the design is convenient.

According to the embodiment of the disclosure, the anti-backflow air valve further comprises a motor fixedly arranged on the sealing plate, an output shaft of the motor is connected with the clamping plate, the motor drives the clamping plate to rotate to provide power for rotation of the clamping plate, and therefore the anti-backflow air valve can be freely opened and closed.

According to the embodiment of the disclosure, the motor is provided with a motor power line connected with the motor power line, the sealing plate is provided with a first fixing clamping hook, the motor power line is clamped into the inner side of the first fixing clamping hook, so that the motor power line is fixed, and inconvenience brought to normal use of the fresh air machine by messy wiring of the motor power line is avoided.

According to this disclosed embodiment, still including locating the temperature sensor of sealed passageway department for detect the follow the new trend air intake gets into the air temperature in the casing can know the air inlet temperature and can carry out other operations to new fan according to the detection temperature.

According to the embodiment of the disclosure, the temperature sensor is provided with the sensor power line connected with the temperature sensor, the sealing plate is provided with the sensor wire passing hole penetrating through the peripheral wall of the sealing plate, the sensor penetrates through the sensor wire passing hole from the outer side of the sealing plate and is arranged at the sealing channel, the space can be saved, and the structure is simple and convenient to design.

According to the embodiment of the disclosure, the peripheral wall of the sealing plate is further provided with a second fixing clamping hook, the second fixing clamping hook and the sealing plate form a second fixing channel, the sensor power line is clamped into the second fixing channel, the sensor power line can be well fixed, and the sensor power line is fixed and the wiring is attractive.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view of the installation of a fresh air machine according to an embodiment of the present disclosure;

FIG. 2 is a schematic view of another perspective of installation of a fresh air machine according to an embodiment of the present disclosure;

FIG. 3 is a perspective view of a fresh air machine according to an embodiment of the present disclosure;

FIG. 4 is a perspective view of another perspective of a fresh air machine according to an embodiment of the present disclosure;

FIG. 5 is a schematic view of a partial structure of a fresh air machine according to an embodiment of the present disclosure;

FIG. 6 is an exploded view of a portion of a fresh air machine according to an embodiment of the present disclosure;

FIG. 7 is another schematic partial structure view of a fresh air machine according to an embodiment of the present disclosure;

FIG. 8 is a schematic structural view of a downdraft prevention valve according to an embodiment of the present disclosure;

FIG. 9 is a top cross-sectional view of a downdraft prevention valve according to an embodiment of the present disclosure;

FIG. 10 is a front cross-sectional view of a downdraft prevention valve according to an embodiment of the present disclosure;

FIG. 11 is another top cross-sectional view of a downdraft prevention valve according to an embodiment of the present disclosure;

fig. 12 is a partial enlarged view at B in fig. 11;

FIG. 13 is a front view of a downdraft prevention valve according to an embodiment of the present disclosure;

FIG. 14 is an enlarged view of a portion of FIG. 13 at A;

FIG. 15 is another schematic structural view of a back draft prevention valve according to an embodiment of the present disclosure;

FIG. 16 is another partial schematic structural view of a downdraft prevention valve according to an embodiment of the present disclosure.

In the above figures: outdoor 01; indoor 02; an indoor ceiling wall 03; a decorative plate 04; a fresh air machine 10; a housing 1; a base plate 101; a front end plate 102; a rear end plate 103; side panels 104; a top plate 105; a fresh air inlet 11; a fresh air outlet 12; a fresh air duct 13; a fresh air inlet pipe 21; a fresh air outlet pipe 22; an anti-backflow air valve 3; a sealing plate 31; a sealing channel 311; the sealing ribs 312; the first sealing rib 3121; the second sealing rib 3122; a sealing groove 3123; groove side walls 31231; a groove bottom wall 31232; a motor mounting location 313; a motor through hole 3131; a motor fixing hole 3132; motor fixing post 3133; a first fixing hook 314; a first wire incoming arm 3141; a first chamfer 31411; a second wire incoming arm 3142; a second barb 31421; a second chamfer 31422; an outer peripheral groove 315; a connecting projection 316; sensor wire passing holes 317; a second fixing hook 318; a first barb 3181; a second fixed channel 319; a chucking plate 32; a first card 321; a second card 322; the sealing protrusion 323; a convex end wall 3231; raised side walls 3232; a motor 41; a motor power line 42; a temperature sensor 43; a sensor power supply line 44; a wire fixing clip 45; an air intake part 51; an air intake passage 511; a first air inlet ring 512; a second wind inlet ring 513; an air outlet member 52; an air outlet channel 521; a first vent ring 522; a second wind ring 523; a filter screen 53; a fresh air blower 54.

Detailed Description

The utility model is described in detail below by way of exemplary embodiments. It should be understood, however, that elements, structures and features of one embodiment may be beneficially incorporated in other embodiments without further recitation.

The present invention provides a new blower for introducing outdoor fresh air into a room, which may be a single-direction flow new blower, and the new blower will be described with reference to fig. 1 to 16. Referring to fig. 3 to 6, the fresh air fan includes a casing 1, a fresh air inlet 11 and a fresh air outlet 12 are formed on the casing 1, and the fresh air inlet 11 is communicated with the fresh air outlet 12 to form a fresh air duct 13.

Wherein, new trend air intake 11 forms in one side of casing, and new trend air outlet 12 forms in the opposite side of casing, and new trend air outlet can set up in the opposite side that the casing set up new trend air intake.

The fresh air inlet 11 is communicated with the outdoor air space 01, the fresh air outlet 12 is communicated with the indoor air space 02, specifically, the fresh air inlet can be directly communicated with the outdoor air space or communicated with the outdoor air space through a fresh air inlet pipe 21, and the fresh air outlet can be directly communicated with the indoor air space or communicated with the indoor air space through a fresh air outlet pipe 22.

When installing the new trend fan, the new trend fan can be horizontal installs indoor, and new trend air intake and new trend air outlet can be formed at the opposite both ends that set up of casing respectively. Specifically, the cabinet 1 includes a bottom plate 101, a front end plate 102 and a rear end plate 103 disposed at both ends in a length direction of the bottom plate, two side plates 104 disposed at both ends in a width direction of the bottom plate, and a top plate 105 disposed at a top portion opposite to the bottom plate. The fresh air inlet 11 and the fresh air outlet can be respectively arranged on the front end plate and the rear end plate.

Referring to fig. 1-2, the fresh air inlet pipe passes through the wall and is communicated with the outside. Fresh air machine can hoist and mount on indoor roof 03, and when indoor being equipped with the decorative board 04 of installing under the roof, fresh air machine can install between indoor roof 03 and decorative board 04, and the fresh air goes out the tuber pipe and can run through the decorative board downwards for the fresh air that fresh air machine introduced can flow to the decorative board below.

Because the fresh air inlet is communicated with the outside directly or through a fresh air inlet pipe and the like, in windy weather, outdoor air enters the fresh air duct through the fresh air inlet, airflow disturbance in the fresh air duct is caused, the disturbance changes along with the change of the outdoor air, the airflow collides back and forth in the fresh air duct, noise which is laughted and glowed is sent out, and the user experience is seriously influenced.

Therefore, in order to reduce noise and improve user experience, referring to fig. 5, the fresh air fan further comprises a backflow prevention air valve 3, the backflow prevention air valve 3 is arranged in the fresh air duct and located at the fresh air inlet, and the backflow prevention air valve 3 is opened or closed to enable the fresh air inlet to be opened or closed.

Referring to fig. 7, the backflow prevention air valve 3 includes a sealing plate 31 and a clamping plate 32, wherein the sealing plate 31 is connected to the fresh air inlet, a sealing channel 311 is provided on the sealing plate and runs through the sealing plate, and the sealing channel is communicated with the fresh air duct and the fresh air inlet.

The sealing channel 311 may be disposed along a thickness direction of the sealing plate 31, and the thickness direction of the sealing plate is consistent with a length direction of the fresh air machine. One end of the sealing plate can be tightly attached to the end plate provided with the fresh air inlet, so that fresh air entering from the fresh air inlet can only enter the shell through the sealing channel.

A catch plate 32 is connected at the sealing channel to open or close the back-draft prevention valve. The setting includes the passageway of closing plate and cardboard, sets up the cardboard and opens and close sealed passageway and make the new trend air intake open and close, can avoid outdoor wind to enter into the new trend wind channel through the new trend air intake in, avoids the noise that outdoor wind arouses, improves user experience.

Referring to fig. 7 to 12, the inner circumferential wall of the sealing channel 311 is provided with a sealing rib 312 circumferentially arranged along the inner circumferential wall, the side wall of the sealing rib 312 is provided with a sealing groove 3123, the panel surface of the clamping plate is provided with a sealing protrusion 323 adapted to the sealing groove, and when the clamping plate closes the sealing channel, the sealing protrusion is clamped into the sealing groove and the clamping plate and the sealing groove are sealed. The face of cardboard includes the preceding face of cardboard and the back face of cardboard, and the side of sealed muscle includes the leading flank and the trailing flank of sealed muscle.

The setting includes the valve of preventing flowing backward of closing plate and cardboard, it opens and closes sealed passageway and makes the new trend air intake open and close to set up the cardboard, can avoid outdoor wind to enter into the new trend wind channel through the new trend air intake in, the noise that avoids outdoor wind to arouse, improve user experience, be equipped with sealed recess on the lateral wall of the sealed muscle in the sealed passageway, be equipped with on the face of cardboard with the sealed protruding of sealed recess adaptation, when the cardboard closes sealed passageway, sealed protruding card is gone into in the sealed recess and sealed between cardboard and the sealed recess, realize the location when can realizing sealing, strengthen the degree of buckling of sealed department, also can reduce the entering volume of wind when less gap appears in sealed department.

The sealing protrusion 323 is provided with a protrusion end wall 3231 and a protrusion side wall 3232, the sealing groove is provided with a groove side wall 31231 and a groove bottom wall 31232, when the clamping plate closes the sealing channel, the protrusion end wall abuts against the groove bottom wall and/or the protrusion side wall abuts against the groove side wall and/or the top of the groove side wall abuts against the plate surface of the clamping plate, the area of the sealing surface can be increased, the bending degree of the sealing surface is increased, and the sealing effect of the sealing surface is improved. The sealed arch can be located the face outward flange department of cardboard, and when sealed arch was located the face outward flange department of cardboard, recess lateral wall top can offset with sealed protruding inboard cardboard face, simple structure, the design of being convenient for.

Referring to fig. 9, the cardboard 32 is divided into a first cardboard 321 and a second cardboard 322, wherein, the first cardboard 321 and the second cardboard are connected and are arranged in a staggered manner, the sealing ribs include a first sealing rib 3121 and a second sealing rib 3122 arranged in a staggered manner, when the cardboard closes the sealing channel, the first cardboard and the second cardboard are both provided with a sealing protrusion clamped into the sealing groove of the first sealing rib and sealed between the cardboard and the sealing groove, the sealing protrusion of the other is clamped into the sealing groove of the second sealing rib and sealed between the cardboard and the sealing groove, and the cardboard is suitable for various arrangement conditions of the cardboard.

Cardboard rotatable coupling is in sealed passageway department, when sealed passageway is closed to the cardboard, in two cardboards of first cardboard and second cardboard, and in two sealed muscle of first sealed muscle and the sealed muscle of second, the sealed protruding card of one of them cardboard front side is gone into in the sealed recess of one of them sealed muscle rear side and is sealed between this cardboard and the sealed recess, the sealed protruding card of the rear side of another cardboard is gone into in the sealed recess of another sealed muscle rear side and sealed between this cardboard and the sealed recess, be convenient for the cardboard rotates the realization of connecting in sealed passageway department, and is easy operation.

The cardboard can vertically set up all the time, and the rotation axis of cardboard also vertically sets up, the center of the rotation axis accessible cardboard of cardboard. The cardboard can be circular plate, and first cardboard 321 and second cardboard 322 can be the semicircle board, and is corresponding, and the cross section of the sealed passageway of cardboard setting department also is circular, and the cross section of the arbitrary department of sealed passageway can be circular, and is the same, and the shape of cardboard and the shape of sealed passageway can also be the polygon.

Referring to fig. 7-8, the fresh air machine further includes a motor 41, the motor is fixed on the sealing plate, an output shaft of the motor is connected with the clamping plate, and the motor drives the clamping plate to rotate to provide power for the rotation of the clamping plate, so that the backflow preventing air valve can be freely opened and closed. Specifically, a motor mounting position 313 is arranged on the sealing plate, the motor mounting position 313 can be arranged on the peripheral wall of the sealing plate, a motor through hole 3131 penetrating through the peripheral wall of the sealing plate can be arranged at the motor mounting position, and an output shaft of the motor is connected with the clamping plate through the motor through hole. Motor installation position department still can be equipped with the motor fixed orifices 3132 of connection on the closing plate periphery wall, and the motor passes through the motor fixed orifices to be fixed on the closing plate, and motor installation position department still can set up the motor fixed column 3133 of connection on the closing plate periphery wall, and the motor fixed orifices is located on the motor fixed column. Wherein, when the cardboard was vertical to be set up, the motor can be fixed in the top or the below of cardboard.

The cardboard rotates to be connected in sealed passageway department, and when the cardboard closed sealed passageway, the axis of cardboard and the sealed passageway of its place was perpendicular, and when the cardboard opened sealed passageway to the biggest, the cardboard was parallel with the axis of the sealed passageway of its place.

Referring to fig. 13, the motor has a motor power line 42 connected thereto, a first fixing hook 314 is provided on the sealing plate, and the motor power line is clamped into the inner side of the first fixing hook, so that the motor power line is fixed, and inconvenience brought to normal use of the fresh air machine due to disorder wiring of the motor power line is avoided.

Referring to fig. 8, the outer circumferential wall of the sealing plate is formed with an outer circumferential groove 315 formed along the circumferential direction of the outer circumferential wall, and the first fixing hook 314 is formed at the top end of the side wall of the outer circumferential groove on the side away from the fresh air inlet. The motor 41 may be disposed in a peripheral groove.

The lateral wall that the periphery groove is close to new trend air intake one side can with casing fixed connection for closing plate and casing fixed connection, wherein can be through screw fixed connection, the screw that wherein fixed closing plate and casing can penetrate the periphery groove and be close to the lateral wall of new trend air intake one side and the lateral wall that the new trend air intake one side was kept away from to the periphery groove is connected, makes the longer reinforcing fixed strength of length of screw.

The connection bulge 316 with two ends connected with the two side walls can be arranged between the two side walls of the peripheral groove, and the screws for fixing the sealing plate and the casing can firstly penetrate through the side wall of the peripheral groove close to one side of the fresh air inlet and be connected with the connection bulge or can successively penetrate through the side wall of the peripheral groove close to one side of the fresh air inlet and the side wall of the connection bulge and the side wall of the peripheral groove far away from one side of the fresh air inlet.

The fresh air machine further comprises a temperature sensor 43 arranged at the position of the sealing channel and used for detecting the temperature of air entering the shell from the fresh air inlet, so that the temperature of the inlet air can be known, and other operations can be carried out on the fresh air machine according to the detected temperature.

The temperature sensor is provided with a sensor power line 44 connected with the temperature sensor, a wire fixing clamp 45 is fixedly arranged on the sealing plate, and the sensor power line is arranged in the wire fixing clamp and can be better fixed. The wire fixing clip 45 may be fixed to the front end surface of the sealing plate, and may be fixed to the front end surface of the sealing plate by a screw. The thread fixing clip can also be arranged at the arranged connecting bulge.

Referring to fig. 13 and 15-16, according to some embodiments of the present patent, the sealing plate is provided with a sensor wire passing hole 317 penetrating through a peripheral wall of the sealing plate, and the temperature sensor passes through the sensor wire passing hole from an outer side of the sealing plate to be disposed at the sealing channel, so that space can be saved, and the structure is simple and convenient to design. Specifically, the sensor wire passing hole may be provided on the bottom wall of the peripheral groove.

Referring to fig. 16, a second fixing hook 318 is further disposed on the outer peripheral wall of the sealing plate, a second fixing channel 319 is formed between the second fixing hook and the sealing plate, and the sensor power line is clamped into the second fixing channel, so that the sensor power line can be better fixed, the sensor power line is fixed, the routing is attractive, specifically, the second fixing hook is disposed on the bottom wall of the outer peripheral groove, and the second fixing hook and the side wall of the outer peripheral groove form the second fixing channel. The outer end of the second fixing clamping hook is provided with a first barb 3181 towards one side of the side wall of the outer shaft groove, so that the power line of the sensor is prevented from being separated from the second fixing channel.

Referring to fig. 14, the sensor power line 44 is also clamped into the first fixing hook, so that the sensor power line can be better fixed, and the sensor power line is fixed and the routing is beautiful. The first fixing clamping hook comprises a first incoming line arm 3151 and a second incoming line arm 3152, a line inlet is formed between the first incoming line arm and the second incoming line arm, a motor power line is located on the inner side of the first incoming line arm, a sensor power line 44 is located on the inner side of the second incoming line arm, and a second barb is arranged on the outer end of the second incoming line arm to prevent the sensor power line from being separated from the second incoming line arm. The outer sides of the end parts, close to the wire inlet, of the first wire inlet arm and the second wire inlet arm are respectively provided with a first chamfer 31411 and a second chamfer 31422, so that a power wire can be conveniently clamped in.

The temperature sensor can be arranged at the sealed channel through the sensor wire passing hole, the sensor power wire is then fixedly arranged in the second fixed channel, and then the sensor power wire is fixed on the inner side of the first fixed clamping hook.

Referring to fig. 3 and 5, the fresh air machine further includes an air inlet component 51, the air inlet component is connected to the outside of the casing and located at the fresh air inlet, an air inlet channel 511 may be formed in the air inlet component, and the air inlet component may include a first air inlet ring 512 and/or a second air inlet ring 513, wherein the cross-sectional area of the air inlet channel formed by the first air inlet ring is constant, and the cross-sectional area of the air inlet channel formed by the second air inlet ring is gradually changed, and may be gradually increased or gradually decreased from one side close to the fresh air inlet to one side far away from the fresh air inlet. Specifically, the second air inlet ring is positioned on one side, close to the fresh air inlet, of the first air inlet ring, the cross-sectional area of an air inlet channel formed by the second air inlet ring is gradually reduced from one side, close to the fresh air inlet, to one side, far away from the fresh air inlet, and the cross-sectional area of the air inlet channel of the first air inlet ring is the same as that of the air inlet channel at the outer end of the second air inlet ring.

Referring to fig. 4 and 5, the fresh air machine further includes an air outlet component 52, the air outlet component is connected to the outside of the casing and located at the fresh air outlet, an air outlet channel 521 may be formed in the air outlet component, and the air outlet component may include a first air outlet ring 522 and/or a second air outlet ring 523, where a cross-sectional area of the air outlet channel formed by the first air outlet ring is constant, and a cross-sectional area of the air outlet channel formed by the second air outlet ring gradually changes, and may gradually increase or gradually decrease from a side close to the fresh air outlet to a side far away from the fresh air outlet. Wherein, it is specific, second air-out circle is located one side that first air-out circle is close to the new trend air outlet, and the cross-sectional area of the air-out passageway that second air-out circle formed diminishes gradually to one side of keeping away from the new trend air outlet by one side that is close to the new trend air outlet, and the cross-sectional area of the air-out passageway of first air-out circle is the same with the cross-sectional area of the air-out passageway of second air-out circle outer end.

Referring to fig. 5, the fresh air fan further includes a filter screen 53 disposed in the fresh air duct and located on a side of the backflow-preventing air valve 3 away from the fresh air inlet, and the filter screen filters air entering the fresh air duct. The outer side of the filter screen can be close to the inner wall of the casing as much as possible, so that the air entering the fresh air duct flows to the fresh air outlet after passing through the filter screen as much as possible.

Referring to fig. 5, the new air blower further includes a new air blower 54 disposed in the new air duct and located on the side of the filter screen away from the new air inlet, and the new air duct is fed with air in the new air duct through the new air outlet. The fresh air fan further comprises an electrical box (not shown), and the electrical box is arranged in the fresh air duct and is positioned on one side of the fresh air fan.

In the description of the present invention, 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 of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

The terms "first", "second" and "first" 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, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

In the description of the present invention, it should 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; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims (10)

1. A new fan, comprising:

the fresh air inlet is communicated with the fresh air outlet to form a fresh air duct;

prevent flowing backward the blast valve, locate in the new trend wind channel and be located new trend air intake department opens or closes prevent flowing backward the blast valve makes the new trend air intake opens or closes, prevent flowing backward the blast valve and include:

the sealing plate is connected to the fresh air inlet, a sealing channel penetrating through the sealing plate is arranged on the sealing plate and is communicated with the fresh air channel and the fresh air inlet, sealing ribs arranged along the circumferential direction of the inner circumferential wall of the sealing channel are arranged on the inner circumferential wall of the sealing channel, and sealing grooves are arranged on the side walls of the sealing ribs;

the clamping plate is connected with the sealing channel to open or close the sealing channel so that the backflow preventing air valve is opened or closed, a sealing bulge matched with the sealing groove is arranged on the plate surface of the clamping plate, when the clamping plate closes the sealing channel, the sealing bulge is clamped in the sealing groove, and the clamping plate and the sealing groove are sealed.

2. The new fan of claim 1, wherein the sealing protrusion has a protrusion end wall and a protrusion side wall, the sealing groove has a groove side wall and a groove bottom wall, and when the card closes the sealing channel, the protrusion end wall abuts against the groove bottom wall and/or the protrusion side wall abuts against the groove side wall and/or the top of the groove side wall abuts against the plate surface of the card.

3. The new fan according to claim 1, wherein the clamping plate is divided into a first clamping plate and a second clamping plate, the first clamping plate and the second clamping plate are connected and arranged in a staggered manner, the sealing ribs comprise a first sealing rib and a second sealing rib which are arranged in a staggered manner, when the clamping plate closes the sealing channel, in both the first clamping plate and the second clamping plate, the sealing protrusion of one of the first clamping plate and the second clamping plate is clamped into the sealing groove of the first sealing rib and sealed between the first clamping plate and the sealing groove, and the sealing protrusion of the other of the first clamping plate and the second clamping plate is clamped into the sealing groove of the second sealing rib and sealed between the first clamping plate and the sealing groove.

4. The fresh air machine as claimed in claim 3, wherein the clamping plate is rotatably connected to the sealing channel, when the clamping plate closes the sealing channel, in two clamping plates of the first clamping plate and the second clamping plate, and in two sealing ribs of the first sealing rib and the second sealing rib, the sealing protrusion on the front side of one clamping plate is clamped into the sealing groove on the rear side of one sealing rib and sealed with the sealing groove, and the sealing protrusion on the rear side of the other clamping plate is clamped into the sealing groove on the rear side of the other sealing rib and sealed with the sealing groove.

5. The new fan of claim 1, wherein the sealing protrusion is located at an outer edge of the board face of the card board.

6. The fresh air machine as claimed in claim 4, further comprising a motor fixed to the sealing plate, wherein an output shaft of the motor is connected to the chuck plate, and the motor drives the chuck plate to rotate.

7. The new fan according to claim 6, wherein the motor has a motor power line connected thereto, the sealing plate is provided with a first fixing hook, and the motor power line is clamped into the inner side of the first fixing hook.

8. The new fan of claim 1, further comprising a temperature sensor disposed at the sealed channel for detecting the temperature of the air entering the casing from the new air inlet.

9. The fresh air machine as claimed in claim 8, wherein the temperature sensor has a sensor power line connected thereto, the sealing plate is provided with a sensor wire passing hole penetrating through a peripheral wall of the sealing plate, and the sensor is provided at the sealing passage from an outer side of the sealing plate through the sensor wire passing hole.

10. The new fan according to claim 9, wherein a second fixing hook is further disposed on the outer peripheral wall of the sealing plate, the second fixing hook and the sealing plate form a second fixing channel, and the sensor power line is clamped into the second fixing channel.

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