CN209763291U

CN209763291U - Cabinet air conditioner

Info

Publication number: CN209763291U
Application number: CN201920121661.8U
Authority: CN
Inventors: 周孝华; 熊军; 徐志亮; 林辉
Original assignee: TCL Air Conditioner Zhongshan Co Ltd
Current assignee: TCL Air Conditioner Zhongshan Co Ltd
Priority date: 2019-01-24
Filing date: 2019-01-24
Publication date: 2019-12-10
Anticipated expiration: 2029-01-24

Abstract

The utility model discloses a cabinet air conditioner, include: the cross-flow fan comprises a casing, a cross-flow air duct, a heat exchange assembly and a cross-flow fan, wherein the casing comprises a rear casing and a front casing, an air inlet is formed in the rear casing, and an air outlet is formed in the front casing; the cross-flow fan is arranged in the shell and comprises a cross-flow air duct formed by a volute and a volute tongue and a cross-flow wind wheel arranged in the cross-flow air duct, and the air outlet end of the cross-flow air duct is communicated with the air outlet; the heat exchange assembly is arranged between the cross-flow fan and the rear shell; the air outlet end of the heat exchange assembly is not arranged opposite to the air inlet end of the through-flow air duct. The utility model discloses a be the non-just to setting up with heat exchange assembly's air-out end and the air inlet port end in through-flow wind channel, after wind comes out from heat exchange assembly, need just can get into the through-flow wind channel through turning or skew in, effectively cushion the wind speed that gets into the through-flow wind channel to make the air-out that the air outlet goes out steady more even, noise reduction.

Description

Cabinet air conditioner

Technical Field

The utility model belongs to the technical field of the air conditioner technique and specifically relates to a cabinet air conditioner.

Background

along with the improvement of human living standard, the requirement of a user on the comfort level of an air conditioner is also continuously improved, the design of a through-flow air duct of the conventional air conditioner indoor unit has limitations, air inlet ports of the through-flow air ducts of most indoor units are connected with an air outlet end of a heat exchange assembly and are arranged just opposite to each other, so that air coming out of the heat exchange assembly directly enters the through-flow air duct, the air speed in the through-flow air duct is larger, the air speed at an air outlet is overlarge, noise is easy to generate, and the use of the user is influenced.

Accordingly, the prior art is yet to be improved and developed.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model lies in, to the above-mentioned defect of prior art, provide a cabinet air conditioner, it is big to aim at solving the air outlet speed of prior art cabinet air conditioner air outlet department, easily produces the noise scheduling problem.

The utility model provides a technical scheme that technical problem adopted as follows:

A cabinet air conditioner, wherein the cabinet air conditioner comprises:

The shell comprises a rear shell and a front shell, wherein the rear shell is provided with an air inlet, and the front shell is provided with a plurality of air outlets;

The cross-flow fan comprises a cross-flow air channel formed by a volute and a volute tongue and a cross-flow wind wheel arranged in the cross-flow air channel, two adjacent cross-flow fans are separated by a partition plate, and the cross-flow air channel is communicated with the air outlet.

The utility model has the advantages that: the utility model discloses an indoor unit of air conditioner has a plurality of air outlets, effectively solves the single problem of current cabinet-type air supply mode, separates cross-flow fan through the baffle, and inner structure is simple, simple to operate to can solve the poor and cold wind direct-blowing problem of air supply travelling comfort.

Drawings

Fig. 1 is a schematic view of the internal structure of the cabinet air conditioner of the present invention.

Fig. 2 is a schematic structural diagram of the cabinet air conditioner of the present invention.

Fig. 3 is a schematic diagram of a double-air-outlet direct-blowing air supply mode of the cabinet air conditioner of the present invention.

Fig. 4 is a schematic diagram of a double-air-outlet surrounding air supply mode of the cabinet air conditioner of the present invention.

Fig. 5 is a schematic diagram of the direct blowing air supply and the oblique blowing air mode of the cabinet air conditioner of the present invention.

Fig. 6 is a schematic view of the mode of the blowing air and the inclined blowing air of the cabinet air conditioner of the present invention.

Fig. 7 is a schematic view of a double air outlet air sweeping mode of the cabinet air conditioner of the present invention.

Fig. 8 is a schematic view of the dual air outlet directional air sweeping mode of the cabinet air conditioner of the present invention.

Fig. 9 is a schematic diagram of a single air outlet direct-blowing air supply mode of the cabinet air conditioner of the present invention.

Fig. 10 is a schematic diagram of an inclined blowing mode of a single air outlet of the cabinet air conditioner according to the present invention.

Fig. 11 is a schematic view of a single air outlet air sweeping mode of the cabinet air conditioner of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer and clearer, the present invention will be described in further detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

it should be noted that, if directional indications (such as upper, lower, left, right, front and rear … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is 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 at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The air outlet end of the heat exchange assembly in the cabinet air conditioner in the prior art is opposite to the air inlet end of the through-flow air channel and is connected together, so that air coming out of the heat exchange assembly directly enters the through-flow air channel, the air speed in the through-flow air channel is large, the air speed of an air outlet is large, noise is easy to generate, and the use of a user is influenced. In order to solve the above problems, some embodiments of the present invention provide a cabinet air conditioner, in which a plurality of cross flow fans are disposed in a casing 10, and adjacent cross flow fans are separated by a partition plate 60. The indoor unit of the air conditioner is provided with a plurality of air outlets, the problem that the air supply mode of the existing cabinet type air conditioner is single is effectively solved, the cross-flow fan is separated through the partition plate, the internal structure is simple, the installation is convenient, and the problems of poor air supply comfort and direct blowing of cold air can be solved. As shown in fig. 1, the embodiment shown in fig. 1 is that two crossflow blowers are arranged in the casing 10, each crossflow blower is provided with a separate crossflow wind wheel 40, and each crossflow wind wheel 40 is controlled by a separate motor. The double-air-outlet structure can provide enough air outlet angle, avoids the air from only blowing the human body, improves the comfort, has more compact structure and avoids the waste of cost. The two crossflow blowers in the embodiment share the same volute tongue 30, and the partition plate 60 is arranged on the shared volute tongue 30, which is beneficial to saving the internal structure of the casing 10. Preferably, as shown in fig. 3, the common volute tongue 30 includes two side sections 310 (the shape of the two side sections 310 is not limited, and may be the bent structure of fig. 1, or may be a uniformly changing arc structure) and a middle section 320 (similar to the shape of the Chinese character ji in fig. 1) connecting the two side sections 310. Preferably, the two side segments 310 are symmetrically located in the two cross-flow fans, that is, the two cross-flow fans are identical in shape and size, so that the two side segments can be manufactured in batch, and cost is saved.

In some embodiments, referring to fig. 3, the side section 310 includes a first section 311 extending from a middle section 320 toward the front housing 102, a second section 312 extending from the front housing 102 toward the cross-flow wind wheel 40, a third section connection 313 is provided between one end of the first section 311 near the front housing 102 and one end of the second section 312 near the front housing 102, therefore, the first section 311, the second section 312 and the third section 313 enclose to form a slow flow groove, because the air outlet end of the heat exchange component 50 is not arranged opposite to the air inlet end of the through-flow air duct 100, therefore, after the wind blows out from the wind outlet end of the heat exchange component 50, the wind speed is buffered by the slow flow groove formed by the enclosure of the first section 311, the second section 312 and the third section 313, and the wind is turned to enter the through-flow air duct 100, so that the wind is prevented from blowing directly, the wind outlet speed is reduced, and the comfort of the wind outlet is improved. Further, the side section 310 further includes a fourth section 314 extending from one end of the second section 312 close to the cross-flow wind wheel 40 to the air outlet along the edge of the cross-flow wind wheel 40, and a fifth section 315 extending from one end of the fourth section 314 close to the air outlet 120 to one end of the air outlet 120, as can be seen from fig. 2, a gap is formed between the fourth section 314 and the cross-flow wind wheel 40 for air outlet, and the fifth section 315 forms a rear end of the cross-flow air duct 100 with the scroll casing 20 and the housing 10, so that the air is blown out through the air outlet 120.

Further, the side sections 310 in this embodiment form two through-flow ducts 100 with the scroll casing 20, respectively, and the partition plate 60 is disposed on the middle section. Preferably, in order to make the partition 60 more stable, the partition 60 in this embodiment is provided with a support member at both sides thereof to support the partition 60, so that the partition 60 is more stable. The two through-flow air ducts 100 in this embodiment are both provided with the corresponding air outlets 120, and the air outlets 120 are arranged in parallel, which is beneficial to realizing parallel air supply of each through-flow air duct 100, and thus, a double-air-out cabinet air conditioner is formed.

in some embodiments, as shown in fig. 1 in particular, the electronic device includes a housing 10, the housing 10 includes a rear housing 101 and a front housing 102, which are disposed opposite to each other, an air inlet is disposed on the rear housing 101, and an air outlet 120 is disposed on the front housing 102. In this embodiment, the air inlet and the air outlet 120 of the casing 10 are both provided with a grid for preventing the air inlet and the air outlet 120 from entering foreign matters, and the potential safety hazard can be avoided. The cross-flow fan is arranged in the casing 10, and comprises a cross-flow air duct 100 formed by a volute 20 and a volute tongue 30, and a cross-flow wind wheel 40 arranged in the cross-flow air duct 100, wherein the cross-flow wind wheel 40 is positioned between the volute 20 and the volute tongue 30, and the cross-flow air duct 100 is communicated with an air outlet 120. Further, a heat exchange assembly 50 is disposed at the air inlet near the rear housing 101, and the heat exchange assembly 50 is disposed between the cross flow fan and the rear housing 101, and is used for exchanging heat with air from the air inlet, and further transporting the air into the cross flow air duct 100. In this embodiment, the air outlet end of the heat exchange component 50 (i.e., the side away from the air inlet 101) and the air inlet port of the through-flow air duct 100 are not disposed opposite to each other, that is, in this embodiment, the air outlet end of the heat exchange component 50 and the air inlet port of the through-flow air duct 100 are not disposed opposite to each other as in the conventional design, but the air outlet end of the heat exchange component 50 and the air inlet port of the through-flow air duct 100 are disposed in a staggered, offset or other form. Therefore, the air coming out of the heat exchange assembly 50 needs to turn or enter the through-flow air duct from the side direction instead of directly facing the through-flow air duct, so that the air speed entering the through-flow air duct is reduced, the air entering the through-flow air duct is softer, and the air outlet at the air outlet 120 is ensured to be stable and uniform. As can be seen from fig. 1, in the present embodiment, the air outlet end of the heat exchange assembly 50 faces the partition plate 60 (lower right), and the air inlet port of the through-flow duct 100 also faces the partition plate 60 (upper right), which are not disposed opposite to each other, so that the air path is represented by an arrow in fig. 3, the air coming out of the heat exchange assembly 50 needs to be turned to enter the through-flow duct 100, and the wind speed is buffered during the turning process, so that the wind speed is reduced, the wind outlet is uniform and smooth, and the noise is reduced.

In some embodiments, the through-flow duct 100 may be an arc-shaped duct, and the arc-shaped duct may further buffer the wind speed in the through-flow duct 100, as shown in fig. 1, the spiral casing 20 is configured to be an arc shape, and when the wind enters the through-flow duct 100, the wind passes through the arc-shaped spiral casing 20, so that the wind in the through-flow duct 100 is smoothly delivered, thereby further ensuring more uniform wind outlet.

In some embodiments, the heat exchange assembly 50 in this embodiment may be disposed along the shape of the rear housing 101 and close to the rear housing 101, so that the air inlet of the rear housing 101 can be close to the heat exchange assembly 50, so that the air from the air inlet can pass through the heat exchange assembly 50, thereby improving the heat exchange efficiency. Preferably, in order to further improve the heat exchange efficiency, the heat exchange assembly 50 in this embodiment spans two crossflow fans, so that the two crossflow fans share one heat exchange assembly 50, thereby not only effectively improving the heat exchange efficiency, but also effectively saving the cost. Preferably, the heat exchange assembly 50 in this embodiment includes a heat exchanger 510 and a heater 520 mounted on the heat exchanger 510 near the side of the air outlet 120. In some embodiments, the heat exchanger 510 of the heat exchange assembly 50 is mounted on the cross frame 530 and is bent in an arc shape, the heat exchanger 510 is provided with a bent protrusion 511, the bent protrusion 511 is an air outlet end of the heat exchange assembly 50, and the heater 520 is provided inside the bent protrusion 511, so that air sent by the air outlet end works. Preferably, the bent protrusion 511 protrudes toward the air inlet, so that the heating or cooling function of the heat exchange assembly 50 is more fully performed. Of course, since there are two cross-flow fans in fig. 1, there are two bending protrusions 511 correspondingly disposed on the heat exchanger 510, that is, the heat exchange assembly 50 has an air outlet end disposed in each cross-flow fan. Referring to fig. 1 again, the air outlet ends of the heat exchange assemblies 50 in the two cross-flow fans in the present embodiment and the air inlet port of the cross-flow air duct 100 are both disposed toward the partition plate 60, that is, as shown in fig. 1, the air outlet end of the heat exchange assembly 50 in the cross-flow fan on the left side faces obliquely right-downward, and the air inlet port of the cross-flow air duct 100 faces obliquely right-upward; the air outlet end of the heat exchange assembly 50 in the right cross-flow fan faces obliquely left lower side, the air inlet port of the cross-flow air duct 100 faces obliquely left upper side, and the partition plate 60 is arranged between the two cross-flow fans, so that the air outlet end of the heat exchange assembly 50 in the two cross-flow fans and the air inlet port of the cross-flow air duct 100 are just formed to be respectively arranged towards the partition plate 60, and therefore, the air coming out of the air outlet end of the heat exchange assembly 50 in the two cross-flow fans can turn and then enter the air inlet port of the cross-flow air duct 100 from the side direction, and the air speed is reduced. Moreover, because the air outlet ends of the heat exchange assemblies 50 in the two cross-flow fans are both directed toward the partition plate 60, the air coming out of the heat exchange assemblies 50 is blown away in the direction of the partition plate 60, then the air path is turned by the partition plate 60, and then enters the air inlet port of the cross-flow air duct 100 from the side direction, so that the air is diffused and the air speed is buffered in the process that the air path is turned by the partition plate 60, and the air outlet uniformity is further improved.

preferably, the heater 520 in this embodiment is used for auxiliary heating of air in the heating mode to improve heating efficiency, and may be a resistance wire heating device, a PTC (positive temperature coefficient thermistor) heating device, or another type of heating device.

Of course, the form of providing two cross-flow fans in the casing 10 shown in fig. 1 is only for illustrating the technical solution of the present invention, and is not used for limiting the present invention. In some other embodiments, four cross-flow fans may be disposed in the casing 10, each of the cross-flow fans is provided with an independent cross-flow air duct, and each of the cross-flow fans is provided with an independent air outlet correspondingly and arranged facing four sides, so that four-side air outlet can be realized.

Further, referring to fig. 1 again, the air outlets 120 of the two through-flow air ducts in the present embodiment are both provided with the upper and lower air-sweeping plates 70 and the left and right air-guiding plate assemblies 80, and the upper and lower air-guiding plate assemblies 70 are installed on the volute tongue 30 in the through-flow air duct 100 and face the air outlets 120; the left and right air deflector assemblies 80 are installed at the air outlet of the cross-flow duct 100 and face the air outlet 120. Preferably, the upper and lower air guiding plate assemblies 70 and the left and right air guiding plate assemblies 80 can be rotatably connected, for example, can be connected by a shaft hole, so that the upper and lower air guiding plate assemblies 70 and the left and right air guiding plate assemblies 80 control the air outlet through their own motions. Preferably, the left and right air guiding plate assemblies 80 and the up and down air sweeping plates 70 in this embodiment are composed of a plurality of movable blades, and the movable blades are driven by a motor, and can swing left and right or up and down, so as to realize free-fit large-wide-angle air supply.

In some embodiments, the cross-flow air duct 100 shown in fig. 1 is installed with a first motor and a second motor, both of which are installed on the side wall of the casing 10, and the first motor is electrically connected to the upper and lower air deflector assemblies 70, and the second motor is electrically connected to the left and right air deflector assemblies 80, because in this embodiment, the cross-flow wind wheel 40 in each cross-flow fan is also controlled by an independent motor, and each cross-flow wind wheel 40 is not affected with each other, the upper and lower air deflector assemblies 70 and the left and right air deflector assemblies 80 are independently controlled by the first motor and the second motor, and the control of the cross-flow wind wheel 40 is combined, so that different forms of air outlet modes can be realized.

For example, in the present embodiment, taking the cabinet air conditioner with two cross-flow air ducts in fig. 1 as an example, various forms of air supply modes are implemented by controlling the operations of the left and right air deflector assemblies 80 and the cross-flow wind wheel 40 in the two cross-flow air ducts, including: the air conditioner comprises a double-air-outlet direct blowing air supply mode, a double-air-outlet surrounding air supply mode, a direct blowing air supply + oblique blowing air mode, a sweeping air + oblique blowing air mode, a double-air-outlet sweeping air mode, a double-air-outlet directional sweeping air mode, a single-air-outlet direct blowing air supply mode, a single-air-outlet oblique blowing air mode and a single-air-outlet sweeping air mode. The user can independently select the corresponding air supply mode according to the requirement.

Specifically, as shown in fig. 3, arrows in the drawing indicate the air supply direction, in this embodiment, the cross-flow wind wheels 40 in the left and right cross-flow fans are controlled to be opened, and the left and right air guide plate assemblies 80 in the two cross-flow air ducts 100 are controlled to be fixed, so that the two air outlets 120 realize a double-air-outlet direct-blowing air supply mode, and the air flows at the two air outlets 120 are combined into one air flow at a position of 0.5-2m and are directly blown into the room.

As shown in fig. 4, in the present embodiment, the cross-flow electric wheels 40 in the left and right cross-flow fans are controlled to be turned on, and the left and right air guide plate assemblies 80 in the left and right cross-flow air ducts 100 are controlled to guide air to both sides, for example, the left and right air guide plate assemblies 80 in the left cross-flow air duct in fig. 4 guide air to the left, the left and right air guide plate assemblies 80 in the right cross-flow air duct guide air to the right, two air flows form a large-angle air outlet, the air outlet angle is between 30 ~ 140 ° and 140 °.

As shown in fig. 5, in the present embodiment, the cross-flow motor wheels 40 in the left and right cross-flow fans are controlled to be opened, and the left and right air guide plate assemblies 80 in one cross-flow air duct 100 are controlled to fixedly guide air to the middle, and the left and right air guide plate assemblies 80 in the other cross-flow air duct are controlled to fixedly guide air to the right or left, for example, the left and right air guide plate assemblies 80 in the left cross-flow air duct in fig. 5 are fixed to guide air to the middle, and the left and right air guide plate assemblies 80 in the right cross-flow air duct are fixed to guide air to the right, so that a left direct blowing mode and.

As shown in fig. 6, in the present embodiment, the cross flow wheels 40 in the two cross flow fans on the left and right are controlled to be turned on, the left and right air guide plate assemblies 80 in one cross flow duct 100 are controlled to rotate left and right to form left and right air sweeping, and the left and right air guide plate assemblies 80 in the other cross flow duct 100 are fixed to guide air to the right or left, so as to form a air sweeping + oblique air blowing mode.

As shown in fig. 7, in the present embodiment, the cross-flow wheels 40 in the left and right cross-flow fans are controlled to be turned on, and the left and right air guide plate assemblies 80 of the two cross-flow air ducts 100 are controlled to rotate to sweep air left and right, so that large-range air supply is realized. Specifically, the left and right air guide plate assemblies 80 of the two through-flow air ducts 100 may be controlled to rotate in one direction synchronously, and the left and right air guide plate assemblies 80 of the through-flow air ducts 100 may also be controlled to rotate in opposite directions synchronously.

as shown in fig. 8, in this embodiment, the rotation range of the left and right air guiding plate assemblies 80 can be further controlled based on the embodiment shown in fig. 7, so as to control the air blowing range of the left and right air guiding plate assemblies 80, as shown in fig. 8, although the left and right air sweeping is performed on both sides, the air sweeping range on the right side is smaller than that on the left side, and a dual-outlet directional air sweeping mode is implemented.

Preferably, in this embodiment, the cross-flow impeller 40 in one cross-flow fan may be further controlled to be turned off, so that the cross-flow fan does not operate, only the cross-flow impeller 40 in one cross-flow fan is turned on, and the left and right air deflector assemblies 80 are controlled to implement a single-outlet direct-blowing air supply mode (as shown in fig. 9), a single-outlet oblique-blowing air mode (as shown in fig. 10), and a single-outlet sweeping air mode (as shown in fig. 11).

To sum up, the utility model discloses a cabinet air conditioner, include: the air conditioner comprises a shell, a fan and a control device, wherein the shell comprises a rear shell and a front shell, an air inlet is formed in the rear shell, and an air outlet is formed in the front shell; the cross-flow fan is arranged in the casing and comprises a cross-flow air duct formed by a volute and a volute tongue and a cross-flow wind wheel arranged in the cross-flow air duct, and the air outlet end of the cross-flow air duct is communicated with the air outlet; the heat exchange assembly is arranged between the cross-flow fan and the rear shell; the air outlet end of the heat exchange assembly is not arranged opposite to the air inlet end of the through-flow air duct. The utility model discloses a be the non-just to setting up with heat exchange assembly's air-out end and the air inlet port end in through-flow wind channel, after wind comes out from heat exchange assembly, need just can get into the through-flow wind channel through turning or skew in, effectively cushion the wind speed that gets into the through-flow wind channel to make the air-out that the air outlet goes out steady more even, noise reduction.

It is to be understood that the invention is not limited to the above-described embodiments, and that modifications and variations may be made by those skilled in the art in light of the above teachings, and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.

Claims

1. A cabinet air conditioner, characterized in that, cabinet air conditioner includes: a machine shell, a first cover plate and a second cover plate,

2. A cabinet air conditioner according to claim 1, wherein two air outlets are provided in the front housing and two cross-flow fans are provided in the cabinet.

3. The cabinet air conditioner of claim 1 or 2, wherein the two adjacent crossflow blowers share a volute tongue, and the partition plate is disposed on the shared volute tongue.

4. The cabinet air conditioner of claim 3, wherein the common volute tongue comprises two side sections and a middle section connecting the two side sections, the partition is disposed on the middle section, the side sections comprise a first section extending from the middle section to the front housing and a second section extending from the front housing to the cross-flow wind wheel, one end of the first section close to the front housing and one end of the second section close to the front housing are connected through a third section, the side sections further comprise a fourth section extending from one end of the second section close to the cross-flow along the edge of the cross-flow wind wheel to the air outlet, and a fifth section extending from one end of the fourth section close to the air outlet to one end of the air outlet.

5. The cabinet air conditioner of claim 2, further comprising a heat exchange assembly disposed between the crossflow blower and the rear housing; the air outlet end of the heat exchange assembly is not arranged opposite to the air inlet end of the through-flow air duct.

6. A cabinet air conditioner according to claim 5, wherein said heat exchange assembly is disposed across said two crossflow blowers.

7. The cabinet air conditioner of claim 6, wherein the heat exchange assembly comprises a heat exchanger and a heater mounted on the heat exchanger on a side adjacent the air outlet.

8. The cabinet air conditioner of claim 5, wherein the air outlet end of the heat exchange assembly and the air inlet port of the through-flow air duct are both disposed towards the partition plate respectively.

9. The cabinet air conditioner of claim 2, further comprising two upper and lower air deflection assemblies, the two upper and lower air deflection assemblies being mounted on the volute tongues of the two crossflow blowers, respectively; the two upper and lower air deflection assemblies are each configured to be driven by two independent first motors.

10. The cabinet air conditioner of claim 9, further comprising two left and right air deflection assemblies, wherein the two left and right air deflection assemblies are respectively mounted at the air outlet ports of the two cross-flow ducts; the two upper and lower air deflection assemblies are each configured to be driven by two independent second motors.