CN115371138A

CN115371138A - Machine in new trend fan and air conditioning

Info

Publication number: CN115371138A
Application number: CN202111223350.0A
Authority: CN
Inventors: 黄满良; 李英舒; 王永涛; 王晓刚; 尹晓英
Original assignee: Qingdao Haier Air Conditioner Gen Corp Ltd; Qingdao Haier Air Conditioning Electric Co Ltd; Haier Smart Home Co Ltd
Current assignee: Qingdao Haier Air Conditioner Gen Corp Ltd; Qingdao Haier Air Conditioning Electric Co Ltd; Haier Smart Home Co Ltd
Priority date: 2021-05-20
Filing date: 2021-10-20
Publication date: 2022-11-22
Also published as: CN115388465A; CN216814380U; CN216716378U; CN216693753U; WO2023065564A1; WO2023065563A1; CN216693751U; CN115388464A; CN113959008A; CN216693754U; WO2023065566A1; CN113932301B; CN216744602U; CN113932301A; CN216814381U; CN216693755U; CN216693752U; CN216744603U; CN115388466A; CN113864882A

Abstract

The invention provides a fresh air fan and an indoor unit of an air conditioner, wherein the fresh air fan is arranged inside a shell of the indoor unit of the air conditioner and comprises a shell, and the shell is limited with a containing space and is provided with a fresh air inlet for sucking fresh air flow and a plurality of fresh air outlets for discharging the fresh air flow. The invention strengthens the fresh air force of the indoor unit of the air conditioner.

Description

Machine in new trend fan and air conditioning

Technical Field

The invention relates to the technical field of air conditioning, in particular to a fresh air fan and an air conditioner indoor unit.

Background

Some existing air conditioners have a fresh air function. Namely, the outdoor fresh air is introduced into the indoor unit of the air conditioner by utilizing the pipeline, and then the fresh air flow is blown to the indoor space under the action of the fan, so that the indoor air is kept fresh and comfortable, and the comfortable experience of a user is improved.

However, in the existing scheme, the flow of fresh air is promoted mostly by means of an original heat exchange fan of an indoor unit of an air conditioner, and the heat exchange fan is more used for blowing heat exchange airflow, so that the wind power and the air quantity of the fresh air airflow are insufficient. Some other schemes additionally arrange special fresh air fans to blow fresh air, but due to the light and thin requirements of the indoor unit of the air conditioner, the layout of the fresh air fans is very limited, and the arrangement of a large fresh air fan is difficult to obtain large air volume.

Disclosure of Invention

The invention aims to provide a fresh air fan and an air-conditioning indoor unit, which overcome the problems or at least partially solve the problems so as to strengthen the fresh air force of the air-conditioning indoor unit.

The invention further aims to optimize the internal structural layout of the indoor unit of the air conditioner, so that the indoor unit not only meets the fresh air quantity, but also does not occupy more internal space of the indoor unit.

In one aspect, the invention provides a fresh air fan which is arranged inside a casing of an indoor unit of an air conditioner and comprises a casing, wherein the casing is limited with a containing space and is provided with a fresh air inlet for sucking fresh air flow and a plurality of fresh air outlets for discharging the fresh air flow.

Optionally, the housing further defines a return air inlet for drawing in a non-fresh airflow; the fresh air fan is configured to allow the fresh air inlet and the return air inlet to be opened simultaneously or alternatively.

Optionally, the fresh air inlet and the return air inlet are adjacent; and the new trend fan still includes:

the rotating baffle is rotatably arranged between the fresh air inlet and the air return opening so as to rotate to a position for closing the fresh air inlet and open the air return opening; or the fresh air inlet is rotated to a position for closing the air return inlet so as to open the fresh air inlet; and

a motor configured to controllably drive the rotary blind to rotate.

Optionally, the housing comprises a volute and a purifying shell, which are abutted and communicated with each other in the inner space;

an impeller of the fresh air fan is arranged in the volute, and the volute is provided with a plurality of fresh air outlets; and is

The purification shell is provided with the fresh air inlet and the air return opening, and a purification module is arranged in the purification shell, so that fresh air sucked from the fresh air inlet flows to the impeller after being purified by the purification module.

Optionally, the volute casing and the purification casing are both flat and are connected in parallel in the thickness direction;

the fresh air outlets are located at different circumferential positions of the volute, and the fresh air inlet is formed in the circumferential surface of the purification shell.

On the other hand, the invention also provides an air conditioner indoor unit, which comprises a casing and the fresh air fan;

the new trend fan sets up in the casing, the new trend import is through pipeline intercommunication outdoor environment in order to introduce new trend air current, a plurality of new trend exports and is used for arranging new trend air current to casing inner space and/or indoor environment.

Optionally, the indoor unit of the air conditioner is a wall-mounted indoor unit of the air conditioner, and the casing is a long strip horizontally arranged in the length direction;

the air conditioner indoor unit further comprises an air guide rod which is fixedly arranged below the shell and is in a hollow rod shape extending along the length direction of the shell, an air guide cavity is formed in the air guide rod, and the air guide rod is provided with a first fresh air outlet in a long strip shape extending along the length direction of the air guide rod;

one fresh air outlet of the fresh air fan is opened downwards and is connected with one end of the air guide rod, so that part of fresh air flow enters the air guide cavity and then is blown to the indoor environment through the first fresh air outlet.

Optionally, the width of the first fresh air outlet is smaller than the width of the air guide cavity, so that the fresh air flow is blown out in an accelerated manner.

Optionally, the indoor air conditioner unit is a wall-mounted indoor air conditioner unit, and the casing is a long strip horizontally arranged in the length direction;

the top of the shell is provided with a second fresh air outlet;

one of the fresh air fans opens upwards to connect the second fresh air outlet.

Optionally, the fresh air fan is arranged at one end of the length direction in the casing.

In the fresh air fan and the indoor unit of the air conditioner, the fresh air fan is provided with the plurality of fresh air outlets, and the plurality of fresh air outlets simultaneously discharge air, so that the fresh air fan discharges air more smoothly, the wind power is stronger, the fresh air quantity of the indoor unit of the air conditioner is larger, and the updating speed of indoor air is accelerated. And the fresh air outlet is increased, and the air outlet resistance is also reduced. And under the same amount of wind, the rotating speed of the fresh air fan is reduced by increasing the fresh air outlet, so that the power consumption and the noise of the fresh air fan are lower.

Further, in the fresh air fan and the indoor unit of the air conditioner, the fresh air fan is provided with an air return opening, and can suck non-fresh air flow, such as indoor air or heat exchange air flow (cold air or hot air). The air return port and the fresh air inlet can be opened simultaneously, so that fresh air flow is mixed with heat exchange air flow or indoor air and then blown out, the mixing process of fresh air and other air flow is finished in advance, and the updating speed of the indoor air is accelerated. And when the fresh air demand does not exist indoors, the fresh air fan bears the blowing work of the heat exchange air flow, and the indoor refrigerating/heating speed is accelerated. In a word, the function of new trend fan has greatly been richened in setting up of return air inlet, and the design is very ingenious.

Furthermore, in the fresh air fan and the indoor unit of the air conditioner, the outer shell of the fresh air fan comprises a volute and a purification shell, the impeller is arranged in the volute, and the purification module is arranged in the purification shell, so that fresh air flow is purified by the purification module, then flows to the impeller, and then is blown out of the volute by the impeller, and the fresh air flow is cleaner. In addition, the volute and the purification shell are flat, the fresh air outlets are arranged at different positions of the volute in the circumferential direction, and the fresh air inlets are arranged on the circumferential surface of the purification shell, so that the layout is more reasonable and compact, and the whole fresh air fan occupies a smaller space.

Furthermore, in the indoor unit of the air conditioner, the air guide rod is arranged below the casing, and part of fresh air flow is introduced by the air guide rod and is discharged through the first elongated fresh air outlet, so that the flow speed of the fresh air flow is higher. Moreover, because the fresh air has the own air outlet channel, if the air conditioner only runs the fresh air mode, the trouble of opening the heat exchange air outlet of the air conditioner is avoided when refrigeration/heating is not needed.

The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.

Drawings

Some specific embodiments of the invention will be described in detail hereinafter by way of example and not by way of limitation with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:

FIG. 1 is a schematic structural diagram of a fresh air blower according to one embodiment of the present invention;

FIG. 2 is another perspective view of the fresh air blower of FIG. 1;

FIG. 3 is a schematic exploded view of the fresh air blower of FIG. 1;

FIG. 4 is a schematic view of the purification enclosure of FIG. 1 in a state in which the rotating flap opens the fresh air inlet;

FIG. 5 is a schematic view of the purification housing of FIG. 1 in a state where the rotary shutter opens the return air opening;

fig. 6 is a schematic structural view of an indoor unit of an air conditioner according to an embodiment of the present invention;

fig. 7 is a schematic view of the indoor unit of the air conditioner shown in fig. 6 with a cabinet section area cut away.

FIG. 8 is an assembled view of the fresh air fan and air guide rod of FIG. 6;

FIG. 9 is an exploded schematic view of FIG. 8;

fig. 10 is an enlarged cross-sectional view of the wind-guiding rod of fig. 8.

Detailed Description

A fresh air blower and an air conditioning indoor unit according to an embodiment of the present invention will be described with reference to fig. 1 to 10. Where the orientations or positional relationships indicated by the terms "front," "back," "upper," "lower," "top," "bottom," "inner," "outer," "lateral," and the like are based on the orientations or positional relationships shown in the drawings, the description is for convenience only and to simplify the description, and no indication or suggestion is made that the device or element so indicated must have a particular orientation, be constructed and operated in a particular orientation, and is therefore not to be construed as limiting the invention.

The terms "first", "second", and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, features defined as "first," "second," etc. may explicitly or implicitly include at least one such feature, i.e., one or more such features. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise. When a feature "comprises or comprises" a or some of its intended features, this indicates that other features are not excluded and that other features may be further included, unless expressly stated otherwise.

The embodiment of the invention provides a fresh air fan which is used for being installed inside an indoor unit of an air conditioner. The indoor unit of the air conditioner is used for conditioning indoor air, such as cooling, heating, dehumidifying, introducing fresh air, and the like. The fresh air fan is used for introducing outdoor fresh air flow into the air-conditioning indoor unit, the fresh air flow is blown to the indoor environment through the air-conditioning indoor unit, the indoor environment air is updated, the air of the indoor environment is kept fresh, and the human health is facilitated.

The indoor unit of the air conditioner may be an indoor part of a split-type room air conditioner that performs cooling/heating using a vapor compression refrigeration cycle system. An evaporator and a heat exchange fan are arranged in the indoor unit of the air conditioner. The evaporator, the heat exchange fan throttling device and a compressor, a condenser and other refrigeration elements arranged in the air conditioner outdoor shell are connected through pipelines to form a vapor compression refrigeration cycle system. Under the action of the heat exchange fan, indoor air enters the interior of a shell of the indoor unit of the air conditioner, is subjected to forced convection heat exchange with the evaporator to form heat exchange air, then blows to a heat exchange air outlet of the shell, finally blows to an indoor environment, and completes an air conditioning process of the indoor environment. The indoor unit of the air conditioner can be in the forms of wall-mounted type, floor type, ceiling type, window type and the like, and the invention is not limited to the indoor unit.

FIG. 1 is a schematic diagram of a fresh air blower 20 according to one embodiment of the present invention; FIG. 2 is another schematic view of the fresh air blower 20 of FIG. 1; fig. 3 is a schematic exploded view of the fresh air blower 20 of fig. 1.

As shown in fig. 1-3, a fresh air blower 20 of an embodiment of the present invention may generally include a housing 100. The casing 100 defines an accommodation space for accommodating various components inside the fresh air blower 20, such as an impeller 300 and the like. The housing 100 is further provided with a fresh air inlet 110 for sucking fresh air flow and a plurality of

fresh air outlets

120 and 130 for discharging fresh air flow. For example, as shown in fig. 1-3, two

fresh air outlets

120, 130 may be provided. The fresh air inlet 110 can be communicated with the outdoor environment through a preset pipeline (fresh air pipe 40). The

fresh air outlets

120 and 130 can directly discharge the fresh air flow into the interior of the casing 10 of the indoor unit of the air conditioner (mixed with the heat exchange air flow or not), so that the fresh air flow is discharged to the indoor environment through the casing 10 of the indoor unit of the air conditioner. Alternatively, the

fresh air outlets

120, 130 may extend directly into the indoor environment to directly discharge fresh air into the indoor environment.

In the embodiment of the invention, in the fresh air fan 20 and the indoor unit of the air conditioner, the fresh air fan 20 is provided with the plurality of

fresh air outlets

120 and 130, and the plurality of

fresh air outlets

120 and 130 simultaneously discharge air, so that the fresh air fan 20 discharges air more smoothly, the wind power is stronger, the fresh air volume of the indoor unit of the air conditioner is larger, and the indoor air updating speed is accelerated. Moreover, the number of the fresh air outlets is increased, and the air outlet resistance of the fresh air flow is also reduced. Under the same air quantity, the rotation speed of the fresh air fan 20 is reduced by adding the

fresh air outlets

120 and 130, so that the power consumption and the noise are lower.

In some embodiments, housing 100 includes a volute 101 and a purge shell 102, which are abutted and in communication with the interior space, as shown in FIG. 1. An impeller 300 of the fresh air fan 20 is arranged in the volute 101, and the volute 101 is provided with a plurality of

fresh air outlets

120 and 130. The purifying shell 102 is provided with a fresh air inlet 110, and a purifying module 200 is arranged in the fresh air inlet 110, so that fresh air sucked from the fresh air inlet 110 can flow to the impeller 300 after passing through the purifying module 200 and being purified by the same. The purification module 200 may be a filtration module to filter out harmful impurities in the fresh air stream. The purification module 200 may also have other processing functions to further process the fresh air stream to make it more fresh and healthy.

As shown in fig. 1 to 3, the volute 101 and the purifying casing 102 can be flat and connected in parallel with each other in the thickness direction, and the two can be fastened by screws. The plurality of

fresh air outlets

120, 130 are located at different positions of the circumferential direction of the scroll casing 101 so as to discharge air in different directions. The fresh air inlet 110 is arranged on the circumferential surface of the purifying shell 102, so that the structural layout of the fresh air fan 20 is more reasonable and compact, and the whole fresh air fan 20 occupies smaller space.

Impeller 300 may be a centrifugal impeller, and one end of volute 101 in the thickness direction (x-axis direction) facing purge case 102 is provided with suction port 1012. The side of the purification casing 102 facing the scroll 101 is opened so as to cover the scroll 101, the edges are sealed and the inner spaces are communicated. The decontamination module 200 is enclosed by the decontamination housing 102. Under the rotation of the impeller 300, the fresh air flow enters the cleaning housing 102 from the fresh air inlet 110 of the cleaning housing 102, flows through the cleaning module 200 to be cleaned, and then enters the volute 101 from the suction port 1012. Under the action of the impeller 300, the purified air flow is radially thrown out along the impeller 300 and then discharged out of the volute 101 through the plurality of

fresh air outlets

120 and 130. Of course, the impeller 300 may be an axial-flow impeller or other type of impeller, and detailed description thereof is omitted here.

In some embodiments, as shown in fig. 1-3, the peripheral surface of the purification shell 102 is provided with a socket 140 to allow the purification module 200 to be inserted into the purification shell 102 through the socket 140 to facilitate installation, cleaning and replacement of the purification module 200.

FIG. 4 is a schematic view of the purification case 102 of FIG. 1 in a state where the fresh air inlet 110 is opened by rotating the shutter 190; fig. 5 is a schematic view of the purification case 102 of fig. 1 in a state where the return air opening 150 is opened by the rotation of the shutter 190.

In some embodiments, as shown in fig. 2, 4 and 5, the housing 100 further defines a return air opening 150 for drawing in a non-fresh air stream, which may be particularly open on the purge shell 102. In one embodiment, as shown in fig. 2, 4 and 5, the air return opening 150 is located at the bottom of the casing 100 and is open downward to draw the heat exchange air flow inside the casing 10. In another solution, not shown, the return air inlet may be directed toward the heat exchanging air inlet 11 of the casing 10 to suck the indoor air without heat exchange.

The fresh air blower 20 is configured to allow the fresh air inlet 110 and the return air inlet 150 to be simultaneously or alternatively opened.

Specifically, for example, in the embodiment shown in fig. 4 and 5, the fresh air inlet 110 and the return air inlet 150 can be alternatively opened, that is, one is opened, and the other is closed. Thus, when the air conditioning indoor unit operates in the fresh air mode, the fresh air inlet 110 is opened, the return air inlet 150 is closed, and all air entering the fresh air fan 20 is fresh air. When there is no fresh air demand indoors, the fresh air inlet 110 is closed, and the return air inlet 150 is opened, so that the fresh air blower 20 undertakes the blowing work of the heat exchange air flow, and the indoor cooling/heating speed is accelerated.

In another scheme, not shown in the drawings, the fresh air inlet 110 and the return air inlet 150 can also be opened simultaneously, so that the fresh air flow and the heat exchange air flow are mixed in the fresh air fan 20 and then blown out. The mixing process of the fresh air and other air flows is completed in advance, and the updating speed of the indoor air is accelerated.

In a word, the setting of the return air inlet 150 greatly enriches the functions of the fresh air fan 20, and the design is very ingenious.

As shown in fig. 4 and 5, in some embodiments, the fresh air inlet 110 and the return air inlet 150 are adjacent. The fresh air blower 20 also includes a rotary damper 190 and a motor 180. The rotating baffle 190 is rotatably installed between the fresh air inlet 110 and the air return opening 150 to rotate to a position for closing the fresh air inlet 110 to open the air return opening 150, as shown in fig. 5; or to a position closing the return air opening 150 to open the fresh air inlet 110, as shown in fig. 6. The motor 180 is configured to controllably drive rotation of the rotary damper 190. Of course, when the rotary damper 190 is rotated to the intermediate state of fig. 4 and 5, both the fresh air inlet 110 and the return air inlet 150 are opened. The embodiment can control the fresh air inlet 110 and the return air inlet 150 only by arranging the rotary baffle 190 and the motor 180, and has very simple and practical structure.

In some alternative embodiments, the translational baffle may also be used to control the opening and closing of the fresh air inlet 110 and the air return opening 150, and two motors and two baffles may also be provided to control the opening and closing of the fresh air inlet 110 and the air return opening 150, which is not described in detail.

The embodiment of the invention also provides an air conditioner indoor unit.

The air conditioning indoor unit may generally include a cabinet 10 and a fresh air blower 20. The fresh air fan 20 may be the fresh air fan 20 of any of the above embodiments. The fresh air fan 20 is disposed inside the casing 10. The fresh air fan 20 includes a housing 100, the housing 100 defines a receiving space and is provided with a fresh air inlet 110 for sucking fresh air flow and a plurality of

fresh air outlets

120 and 130 for discharging fresh air flow, the fresh air inlet 110 is communicated with an outdoor environment, and the

fresh air outlets

120 and 130 are used for discharging fresh air flow to an inner space and/or an indoor environment of the casing 10. That is, the

fresh air outlets

120, 130 may discharge the fresh air flow into the interior of the housing 10 and then to the indoor environment through the opening of the housing 10. Alternatively, the

fresh air outlet

120, 130 may be directed to exhaust the suction air outlet to the indoor environment. Or both.

The structural form of the indoor unit of the air conditioner is not limited in the embodiment of the invention, and the indoor unit of the air conditioner can be matched with the fresh air fan 20 in the embodiment of the invention no matter the indoor unit of the air conditioner is a wall-mounted indoor unit of the air conditioner, a floor indoor unit of the air conditioner, a ceiling indoor unit of the air conditioner or other various types of indoor units of the air conditioner.

Fig. 6 is a schematic structural view of an indoor unit of an air conditioner according to an embodiment of the present invention; fig. 7 is a schematic view of the indoor unit of an air conditioner shown in fig. 6, with a partial area of the casing 10 cut away.

In the embodiment shown in fig. 6 and 7, the air-conditioning indoor unit is a wall-mounted air-conditioning indoor unit, and the casing 10 is elongated in a horizontal direction (x-axis direction) in the longitudinal direction. The top of the casing 10 is provided with a heat exchange air inlet 11 for sucking indoor air, and the bottom is provided with a heat exchange air outlet for discharging heat exchange air flow. The heat exchanging air inlet 11 and the heat exchanging air outlet can be both strip-shaped with the length direction parallel to the length direction of the casing 10. Under the action of a heat exchange fan (not shown), indoor air enters the casing 10 through the heat exchange air inlet 11, then exchanges heat with an evaporator (not shown) to form heat exchange air flow (cold air in the case of refrigeration and hot air in the case of heating), and finally the heat exchange air flow is promoted to be discharged to the indoor environment through the heat exchange air outlet to finish the refrigeration or heating of the indoor environment. The air guide plate 50 can be arranged at the heat exchange air outlet to guide the air outlet direction.

As shown in fig. 6 and 7, in the wall-mounted air conditioning indoor unit, a second fresh air outlet 13 may be formed at the top of the casing 10. A fresh air outlet 120 of the fresh air blower 20 opens upward to connect to the second fresh air outlet 13.

FIG. 8 is an assembled view of the fresh air fan 20 and the air guide rod 30 of FIG. 6; fig. 9 is an exploded schematic view of fig. 8.

As shown in fig. 6 to 9, in some embodiments, the wall-mounted air conditioning indoor unit may further include a wind guide rod 30. The air guiding rod 30 is fixedly disposed below the casing 10, is a hollow rod extending along the length direction of the casing 10, and has an air guiding cavity 301 formed therein. The air guiding rod 30 is provided with a first fresh air outlet 31 extending along the length direction thereof. A fresh air outlet 130 of the fresh air blower 20 is open downward and connected to one end of the air guide rod 30, so that a part of the fresh air flow enters the air guide cavity 301 and then is blown to the indoor environment through the first fresh air outlet 31. As shown in fig. 9, two ends of the wind-guiding rod 30 can be bent upwards to connect with the casing 10. The bent part (left end in the figure) at one end of the air guide rod 30 is an opening 32 of the air guide cavity 301, the opening 32 is connected with the fresh air outlet 130, and the bent part at the end is in threaded connection or clamping connection with the casing 10 through a connecting rod 35 on the outer wall of the bent part to realize fixation. The bent part at the other end is also provided with a connecting rod 35, but the inside of the bent part is provided with a blocking wall to block the air guide cavity 301, so that the heat exchange air flow is prevented from entering the air guide cavity 301.

Fig. 10 is an enlarged cross-sectional view of wind-guiding rod 30 of fig. 8. As shown in fig. 10, the width of the first fresh air outlet 31 can be smaller than the width of the air guiding cavity 301, so that the fresh air flow is accelerated to blow out the first fresh air outlet 31, and the blowing distance is further.

The embodiment of the invention enables the flow velocity of the fresh air flow to be faster, has an own air outlet channel, and avoids the trouble of opening the heat exchange air outlet of the air conditioner when the indoor unit of the air conditioner only operates in a fresh air mode and does not need refrigeration/heating.

The heat exchange air outlet can be positioned above the first fresh air outlet 31 and arranged in parallel with the first fresh air outlet, so that the heat exchange air flow can be mixed with the fresh air flow in front of the casing 10 under the guiding action of the air deflector 50, and the mixing effect of the heat exchange air flow and the fresh air flow is enhanced. As shown in fig. 6 to 9, the fresh air blower 20 may be disposed at one end (i.e., the left end or the right end) of the length direction inside the casing 10, the fresh air inlet 110 is connected to a fresh air duct 40, and the fresh air duct 40 passes through the casing 10 to extend to an outdoor environment so as to introduce fresh air flow. The second fresh air outlet 13 is located on the left side or the right side of the heat exchange air inlet 11, so that the normal layout of the heat exchange air inlet 11 is not affected.

In some embodiments, volute 101 and purge shell 102 are both flat and each have a thickness that is continuous along the length of enclosure 10 so that they occupy less space in the enclosure. A receptacle 140 is open on the front side of the purge shell 102 to allow the purge module 200 to be inserted into the purge shell 102 through the receptacle 140. Therefore, the user can conveniently clean and replace the purification module 200 by detaching the front panel of the casing 10 of the indoor unit of the air conditioner, and the operation is very convenient.

Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been illustrated and described in detail herein, many other variations or modifications consistent with the principles of the invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should be understood and interpreted to cover all such other variations or modifications.

Claims

1. A fresh air fan is used for being installed inside a casing of an indoor unit of an air conditioner and is characterized in that,

the fresh air fan comprises an outer shell, wherein the outer shell is limited with a containing space and is provided with a fresh air inlet for sucking fresh air flow and a plurality of fresh air outlets for discharging the fresh air flow.

2. The fresh air blower of claim 1 wherein,

the housing further defines a return air inlet for drawing in a non-fresh air stream;

the fresh air fan is configured to allow the fresh air inlet and the return air inlet to be opened simultaneously or alternatively.

3. The fresh air blower of claim 2 wherein,

the fresh air inlet is adjacent to the air return inlet; and the new trend fan still includes:

the rotating baffle is rotatably arranged between the fresh air inlet and the air return opening so as to rotate to a position for closing the fresh air inlet, so that the air return opening is opened; or the fresh air inlet is rotated to a position for closing the air return inlet so as to open the fresh air inlet; and

a motor configured to controllably drive the rotary blind to rotate.

4. The fresh air blower of claim 2 wherein,

the shell comprises a volute and a purifying shell which are connected in an attached mode, and the inner space of the volute is communicated;

5. The fresh air blower of claim 4 wherein,

the volute and the purification shell are both flat and are attached and connected in parallel in the thickness direction;

6. An indoor unit of an air conditioner, characterized by comprising a casing and the fresh air blower as claimed in any one of claims 1 to 5;

the new trend fan sets up in the casing, the new trend import is through pipeline intercommunication outdoor environment in order to introduce new trend air current, a plurality of new trend exports are used for arranging new trend air current to casing inner space and/or indoor environment.

7. An indoor unit of an air conditioner according to claim 6,

the air-conditioning indoor unit is a wall-mounted air-conditioning indoor unit, and the casing is a long strip-shaped structure horizontally arranged along the length direction;

8. An indoor unit of an air conditioner according to claim 7,

the width of the first fresh air outlet is smaller than that of the air guide cavity, so that fresh air flow is blown out in an accelerated manner.

9. An indoor unit of an air conditioner according to claim 6,

the top of the shell is provided with a second fresh air outlet;

one of the fresh air fans opens upwards to connect the second fresh air outlet.

10. An indoor unit of an air conditioner according to claim 6,

the fresh air fan is arranged at one end of the length direction in the shell.