CN112303018A

CN112303018A - Air duct structure and air conditioner indoor unit with same

Info

Publication number: CN112303018A
Application number: CN201910713907.5A
Authority: CN
Inventors: 董明珠; 王千千; 陈诚; 何振健; 吴晓岳; 戴志炜
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2019-08-02
Filing date: 2019-08-02
Publication date: 2021-02-02

Abstract

The invention provides an air duct structure and an air conditioner indoor unit with the same, wherein the air duct structure comprises: the wind channel, the wind channel extends along first preset direction: the guide vane is arranged in the air duct and is fixedly arranged relative to the air duct; the fan blades are arranged in the air duct and can rotate along a first preset rotating direction; the fan blade is provided with a first side and a second side which are oppositely arranged along a first preset direction, and the first side of the fan blade and/or the second side of the fan blade are/is provided with guide vanes so as to convert the circumferential motion of the airflow into axial motion through the guide vanes. The air duct structure solves the problem that the fan efficiency in the air duct structure in the prior art is low.

Description

Air duct structure and air conditioner indoor unit with same

Technical Field

The invention relates to the technical field of household appliances, in particular to an air duct structure and an air conditioner indoor unit with the same.

Background

In order to improve the energy utilization rate of the air conditioner and improve the comfort of a human body, different air outlet modes are required under different modes. In the cooling mode, cold air is blown out from the upper part to realize the bath type cooling effect; in the heating mode, hot air is blown out from below to achieve a carpet type heating effect. The shower type refrigeration and the carpet type heating can more efficiently utilize the performance of the gas, and realize higher energy utilization rate.

At present, the widely used fan blades of air-conditioning products on the market mainly comprise three types, namely a centrifugal fan blade, a cross-flow fan blade and an axial-flow fan blade, and different fan blade forms are required to be configured to meet machine type development for different use requirements and air inlet and outlet modes. However, no fan blade and air duct thereof can only change the direction of air flowing in and out through the change of the rotation direction of the fan blade, so that the air inlet of the traditional air conditioner can only supply air, and the air outlet can only supply air. Although the existing distributed air supply technology can realize air supply through an upper air port and a lower air port, cold air (hot air) can be blown out from the lower air port (the upper air port) during refrigeration (heating), and the energy utilization rate cannot be optimally realized, so that an air duct technology capable of switching the directions of air flow inlet and outlet is urgently needed to be provided, so that air enters from the lower air port and is blown out from the upper air port during a refrigeration mode; during the heating mode, air enters from the upper air inlet and is blown out from the lower air inlet, so that the energy conversion rate is more efficient, and the comfort of a human body is improved.

In addition, the current air duct structure enables eddy current loss between airflows to be large, the fan efficiency to be low, and the air output to be small.

Disclosure of Invention

The invention mainly aims to provide an air duct structure and an air conditioner indoor unit with the same, and aims to solve the problem that a fan in the air duct structure in the prior art is low in efficiency.

In order to achieve the above object, according to one aspect of the present invention, there is provided an air duct structure including: the wind channel, the wind channel extends along first preset direction: the guide vane is arranged in the air duct and is fixedly arranged relative to the air duct; the fan blades are arranged in the air duct and can rotate along a first preset rotating direction; the fan blade is provided with a first side and a second side which are oppositely arranged along a first preset direction, and the first side of the fan blade and/or the second side of the fan blade are/is provided with guide vanes so as to convert the circumferential motion of the airflow into axial motion through the guide vanes.

Furthermore, the fan blades are multiple and arranged at intervals along the first preset direction.

Furthermore, the air duct is provided with a first ventilation opening and a second ventilation opening which are oppositely arranged; the fan blades are multiple, the guide vanes and the fan blades are arranged in a one-to-one correspondence mode, and each guide vane is arranged on one side, close to the first ventilation opening, of the corresponding fan blade or on one side, close to the second ventilation opening, of the corresponding fan blade.

Furthermore, the air duct extends along the vertical direction, the air duct comprises a primary air duct and a secondary air duct, and the secondary air duct is connected with the primary air duct and is arranged above the primary air duct; the plurality of fan blades comprise a primary fan blade and a secondary fan blade, the plurality of guide vanes comprise a primary guide vane and a secondary guide vane, the primary fan blade and the primary guide vane are arranged in the primary air duct, and the secondary fan blade and the secondary guide vane are arranged in the secondary air duct; the first-stage guide vanes are arranged above the first-stage fan blades, and the second-stage guide vanes are arranged above the second-stage fan blades.

Furthermore, the primary fan blade and the secondary fan blade are both connected with a rotating shaft, and the rotating shaft is rotatably arranged to drive the primary fan blade and the secondary fan blade to synchronously rotate.

Furthermore, the air duct structure further comprises a first driving device and a second driving device, the first driving device is in driving connection with the first-stage fan blades, and the second driving device is in driving connection with the second-stage fan blades.

Further, the stator includes stator connecting portion and a plurality of stator blade, and a plurality of stator blades all are connected with stator connecting portion, and a plurality of stator blades set up around the circumference interval of stator connecting portion.

Further, the one end that the stator blade kept away from the stator connecting portion contacts with the inner wall in wind channel.

Further, the guide vane blade is a flat blade or a curved blade.

Furthermore, the fan blade includes relative first end and the second end that sets up, and the fan blade includes fan wheel hub and a plurality of fan blade, and a plurality of fan blade blades all are connected with the fan wheel hub, and a plurality of fan blade blades set up around the circumference interval of fan wheel hub.

Furthermore, a splitter blade is arranged between two adjacent fan blades and connected with the fan blade hub.

According to another aspect of the present invention, an indoor unit of an air conditioner is provided, which includes an air duct structure, wherein the air duct structure is the above-mentioned air duct structure.

The air duct structure comprises the guide vanes, the guide vanes can convert the circumferential motion of the air flow into the axial motion, and the guide vanes are arranged on the first side of the fan blade and/or the second side of the fan blade, so that the air duct structure can play a role in rectifying the air flow between the fan blades, reduce the eddy loss between the air flows and improve the efficiency of the fan.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 illustrates a front view of a duct structure according to the present invention in a down-in-up-out air supply mode;

FIG. 2 illustrates a cross-sectional view of a duct structure according to the present invention in a bottom-in-top-out blowing mode;

FIG. 3 is a schematic structural view of the air duct structure according to the present invention in a top-in-bottom-out blowing mode;

FIG. 4 illustrates a cross-sectional view of the air duct structure according to the present invention in a top-in-bottom-out air supply mode;

FIG. 5 is a perspective view of the air duct structure according to the present invention in a down-in-up-out air supply mode;

FIG. 6 is a perspective view of the air duct structure according to the present invention in a top-in-bottom-out air supply mode;

FIG. 7 illustrates a perspective view of a guide vane of the air duct structure according to the present invention;

FIG. 8 illustrates a perspective view of one embodiment of a fan blade of a duct structure according to the present invention;

FIG. 9 illustrates a front view of one embodiment of a blade of a wind tunnel structure according to the present invention;

FIG. 10 illustrates a perspective view of another embodiment of a blade of the air duct structure according to the present invention;

FIG. 11 illustrates a front view of another embodiment of a blade of a wind tunnel structure according to the present invention;

FIG. 12 is a flow diagram of airflow in the fan blade when the air duct structure according to the present invention is in a down-in and up-out air supply mode;

fig. 13 shows a flow diagram of air flow in the fan blade when the air duct structure according to the present invention is in the top-in bottom-out air supply mode.

Wherein the figures include the following reference numerals:

10. an air duct; 11. a first vent; 12. a second vent; 13. a primary air duct; 14. a secondary air duct; 20. a first-stage fan blade; 30. a secondary fan blade; 40. a first stage guide vane; 50. a secondary guide vane; 61. a guide vane connecting part; 62. a guide vane blade; 71. a wind impeller hub; 72. a fan blade; 73. and a splitter blade.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The present invention provides an air duct structure, please refer to fig. 1 to 13, including: wind channel 10, wind channel 10 extends along first preset direction: the guide vane is arranged in the air duct 10 and is fixedly arranged relative to the air duct 10; the fan blades are arranged in the air duct 10 and can be rotationally arranged along a first preset rotating direction; the fan blade is provided with a first side and a second side which are oppositely arranged along a first preset direction, and the first side of the fan blade and/or the second side of the fan blade are/is provided with guide vanes so as to convert the circumferential motion of the airflow into axial motion through the guide vanes.

In specific implementation, after the airflow passes through the fan blades, axial airflow, radial airflow and circumferential airflow can be generated, the circumferential airflow can generate vortex in the air duct, further vortex loss is generated, the circumferential movement of the airflow is converted into axial movement through the guide vanes, and part of the radial airflow is converted into the airflow moving axially, so that the rectifying effect is achieved.

In this embodiment, the number of the fan blades is multiple, and the plurality of fan blades are arranged at intervals along a first preset direction. The arrangement can greatly increase the air volume and simultaneously has the effect of supercharging.

In the present embodiment, the air duct 10 has a first ventilation opening 11 and a second ventilation opening 12 which are oppositely arranged; the fan blades are multiple, the guide vanes and the fan blades are arranged in a one-to-one correspondence mode, and each guide vane is arranged on one side, close to the first ventilation opening 11, of the corresponding fan blade or on one side, close to the second ventilation opening 12, of the corresponding fan blade.

In one embodiment, the air duct 10 extends in a vertical direction, the air duct 10 includes a primary air duct 13 and a secondary air duct 14, and the secondary air duct 14 is connected to the primary air duct 13 and disposed above the primary air duct 13; the plurality of fan blades comprise a primary fan blade 20 and a secondary fan blade 30, the plurality of guide vanes comprise a primary guide vane 40 and a secondary guide vane 50, the primary fan blade 20 and the primary guide vane 40 are arranged in the primary air duct 13, and the secondary fan blade 30 and the secondary guide vane 50 are arranged in the secondary air duct 14; the first stage guide vanes 40 are arranged above the first stage fan blades 20, and the second stage guide vanes 50 are arranged above the second stage fan blades 30.

In one embodiment, in order to realize the rotation of the first-stage fan blade 20 and the second-stage fan blade 30, the first-stage fan blade 20 and the second-stage fan blade 30 are both connected to a rotating shaft, and the rotating shaft is rotatably disposed to drive the first-stage fan blade 20 and the second-stage fan blade 30 to rotate synchronously. The air duct structure further comprises a third driving device, and the third driving device is in driving connection with the rotating shaft.

In another embodiment, the air duct structure further includes a first driving device and a second driving device, the first driving device is in driving connection with the first stage fan blade 20, and the second driving device is in driving connection with the second stage fan blade 30.

In specific implementation, the first stage fan blades 20 and the second stage fan blades 30 can rotate at the same rotation speed or at different speeds.

In the present embodiment, the guide vane includes a guide vane connecting portion 61 and a plurality of guide vane blades 62, and the plurality of guide vane blades 62 are all connected with guide vane connecting portion 61, and the plurality of guide vane blades 62 are arranged around the circumferential direction interval of guide vane connecting portion 61.

In one embodiment, the end of the vane blade 62 remote from the vane connection 61 is in contact with the inner wall of the air duct 10. The rectification effect is better by the arrangement.

In another embodiment, the end of the guide vane blade 62 away from the guide vane connection 61 is spaced from the inner wall of the air duct 10.

In particular implementations, the vane blades 62 are flat or curved blades. The guide vane blades 62 may have a pre-swirl effect on the air flow when they are curved blades.

In this embodiment, the fan blade includes a first end and a second end which are oppositely arranged, the fan blade includes a fan blade hub 71 and a plurality of fan blades 72, the plurality of fan blades 72 are all connected with the fan blade hub 71, and the plurality of fan blades 72 are arranged around the fan blade hub 71 at intervals in the circumferential direction; wherein, a splitter blade 73 is arranged between two adjacent fan blades 72, and the splitter blade 73 is connected with the fan wheel hub 71. In specific implementation, a flow guide channel is provided between two adjacent fan blades 72, so that the airflow flows out from the circumferential direction of the flow guide channel. The centrifugal effect of the fan blade is enhanced, and the airflow can flow from the first side to the second side of the fan blade and also can flow from the second side to the first side of the fan blade; in addition, the provision of the splitter blades 73 avoids the generation of a vortex when the spacing between the two fan blades is large.

The splitter blade 73 extends from the first end of the fan blade to the second end.

When the fan blade is specifically implemented, the fan blade is also a novel mixed flow fan blade, and the air duct structure is also a two-stage mixed flow air duct.

The invention of the air duct structure is characterized in that: the novel mixed flow fan blade (without a fan blade outer ring) is utilized to place the two fan blades in the air duct in the same direction respectively, and the two modes of downward inlet, upward outlet and upward inlet and downward outlet of the switching of the air inlet and outlet directions can be realized by adjusting the rotating direction of the fan blades and matching the corresponding air duct molded lines. Meanwhile, two guide vanes are respectively arranged above the primary fan blade and the secondary fan blade. The guide vanes are additionally arranged between the first-stage fan blades and the second-stage fan blades, so that the effect of rectifying the airflow between the fan blades can be achieved; the guide vanes additionally arranged at the upper ends of the secondary fan blades can respectively play the effects of outlet rectification and inlet prewhirl in two modes. The guide vane that increases can change the air current direction into axial motion from circumferential motion, reduces the vortex loss between the air current, greatly improves fan efficiency, increases the air output.

In specific implementation, the air duct profile can be changed, when the air flow enters from the lower part and exits from the upper part, the air duct profile is changed to be shown in fig. 1 and 2, and when the air flow enters from the upper part and exits from the lower part, the air duct profile is changed to be shown in fig. 3 and 4.

The specific implementation mode of the invention is as follows:

the two-stage mixed flow air duct can realize the switching of the air flow inlet and outlet directions so as to realize two air supply modes of top-in bottom-out or bottom-in top-out. The novel mixed flow fan blade has wide blades, does not have an external sealing ring, has two forms of a fan blade with a splitter blade and a fan blade without the splitter blade, and can realize two effects in the axial direction and the centrifugal direction in the fan blade acting process. The fan blade is matched with the air duct structure shown in the figures 1 to 4, and two air supply modes of upper inlet and lower outlet or lower inlet and upper outlet can be realized.

In the cooling mode, the air conditioner adopts a down-in and up-out air supply mode, and as shown in fig. 1 and 2, the two stages of fan blades rotate anticlockwise (top view). Airflow enters from the lower end of the first-stage air duct blade, after being blown out from the first-stage blade, the airflow blown out from the first-stage blade can be rectified by the first-stage guide blade, the circumferential motion of the airflow is converted into axial motion, so that the eddy loss among the airflow is reduced, the rectified airflow enters the secondary air duct from the lower end of the secondary blade, after secondary power is applied by the secondary blade, the rectified airflow is blown out from the upper end of the secondary blade, and then secondary rectification is performed by the secondary guide blade, so that the airflow is blown out of the air duct, and thus a bottom-in and top-out air supply mode is realized, and the airflow in the blade flows to the top-out air flow direction.

In the heating mode, the air conditioner adopts an air supply mode of top-in and bottom-out, and as shown in fig. 3 and 4, the two stages of fan blades rotate clockwise (top view). After entering the air duct from the secondary air duct throat, the airflow firstly passes through the secondary guide vane, the guide vane plays double roles of inlet pre-rotation and rectification at this time, then passes through the secondary fan blade to do work, then passes through the primary guide vane, the primary guide vane can rectify the airflow blown out from the secondary fan blade, the circumferential motion of the airflow is converted into axial motion so as to reduce the eddy current loss among the airflows, the rectified airflow enters the primary air duct from the upper end of the primary fan blade, and finally is blown out from the lower end of the primary fan blade after secondary work is done by the primary fan blade, so that an air supply mode of top-in and bottom-out is realized, and the flow direction of the airflow in the fan blade is shown in the bottom air outlet flow.

Two novel mixed flow fans are arranged in the two-stage mixed flow air duct up and down; the fan comprises fan blades and a motor; and the fans are arranged in the same direction, so that the working capacity of the fan blades can be improved. The guide vane structure added between the first-stage fan blade and the second-stage fan blade can achieve the effect of rectifying the airflow between the fan blades; the guide vane structure added at the upper end of the secondary fan blade can respectively play the effects of outlet rectification and inlet prewhirl in two modes. The guide vane structure added can convert the air flow direction from circumferential motion to axial motion, reduce the eddy loss between air flows, greatly improve the efficiency of the fan and increase the air output.

The two-stage mixed flow air duct can realize the secondary work doing process of the fan, and the mode can increase the work doing capability of the whole fan. For example, after the first-stage fan blade applies work, the first-stage fan blade performs rectification through the first-stage guide vane, so that the inter-airflow vortex loss can be reduced, then the first-stage fan blade performs secondary work through the second-stage fan blade, the working capacity of the fan can be greatly improved, and the two-stage mixed flow air channel can also achieve the effect of secondary pressurization. Therefore, the two-stage mixed flow air duct matched guide vane structure can greatly improve air output, reduce energy loss of a fan, overcome larger resistance due to a larger supercharging effect, and has a remarkable effect when being applied to an air conditioner with two air supply modes of top-in bottom-out or bottom-in top-out.

In specific implementation, the air supply mode of the lower inlet and the upper outlet is not limited to a cooling mode, and the air supply mode of the upper inlet and the lower outlet is not limited to a heating mode; the two-stage mixed flow air duct technology is not limited to the air conditioning industry.

The air duct structure of the invention solves the problems that:

1. the air channel technology can realize the switching of the air inlet and outlet directions.

2. Compared with a single-stage mixed flow air duct, the two-stage mixed flow air duct can greatly increase the air quantity and simultaneously has the effect of secondary pressurization.

3. A guide vane structure is added between two stages of mixed flow air channels, so that the air flow direction can be converted from circumferential motion to axial motion, the eddy loss between air flows is reduced, and the efficiency of the fan is improved.

The invention also provides an air conditioner indoor unit which comprises an air duct structure, wherein the air duct structure is the air duct structure in the embodiment.

From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An air duct structure, comprising:

an air duct (10), the air duct (10) extending in a first preset direction:

the guide vane is arranged in the air duct (10) and is fixedly arranged relative to the air duct (10);

the fan blades are arranged in the air duct (10) and can be rotationally arranged along a first preset rotating direction; the fan blade is provided with a first side and a second side which are oppositely arranged along the first preset direction, and the guide vane is arranged on the first side of the fan blade and/or the second side of the fan blade so as to convert the circumferential motion of the airflow into axial motion through the guide vane.

2. The air duct structure according to claim 1, wherein the number of the fan blades is plural, and the plural fan blades are arranged at intervals along a first preset direction.

3. The air duct structure according to claim 1, characterized in that the air duct (10) has a first ventilation opening (11) and a second ventilation opening (12) which are oppositely arranged; the fan blade is a plurality of, the stator is a plurality of, and is a plurality of the stator sets up with a plurality of the fan blade one-to-one, each the stator sets up correspondingly the fan blade is close to one side of first vent (11), or each the stator sets up correspondingly the fan blade is close to one side of second vent (12).

4. The air duct structure according to claim 3, characterized in that the air duct (10) extends in a vertical direction, the air duct (10) includes a primary air duct (13) and a secondary air duct (14), and the secondary air duct (14) is connected to the primary air duct (13) and is disposed above the primary air duct (13); the fan blades comprise a first-stage fan blade (20) and a second-stage fan blade (30), the guide vanes comprise a first-stage guide vane (40) and a second-stage guide vane (50), the first-stage fan blade (20) and the first-stage guide vane (40) are arranged in the first-stage air duct (13), and the second-stage fan blade (30) and the second-stage guide vane (50) are arranged in the second-stage air duct (14);

the first-stage guide vanes (40) are arranged above the first-stage fan blades (20), and the second-stage guide vanes (50) are arranged above the second-stage fan blades (30).

5. The air duct structure according to claim 4, wherein the primary fan blade (20) and the secondary fan blade (30) are connected with a rotating shaft, and the rotating shaft is rotatably arranged to drive the primary fan blade (20) and the secondary fan blade (30) to rotate synchronously.

6. The air duct structure according to claim 4, characterized in that the air duct structure further comprises a first driving device and a second driving device, the first driving device is in driving connection with the primary fan blade (20), and the second driving device is in driving connection with the secondary fan blade (30).

7. The air duct structure according to claim 1, characterized in that the guide vane includes a guide vane connecting portion (61) and a plurality of guide vane blades (62), a plurality of the guide vane blades (62) are each connected to the guide vane connecting portion (61), and a plurality of the guide vane blades (62) are arranged around a circumferential interval of the guide vane connecting portion (61).

8. The air duct structure according to claim 7, characterized in that an end of the guide vane blade (62) remote from the guide vane connection portion (61) is in contact with an inner wall of the air duct (10).

9. The air duct structure according to claim 7, characterized in that the guide vane blade (62) is a flat plate blade or a curved blade.

10. The air duct structure according to claim 1, wherein the fan blade includes a first end and a second end which are opposite to each other, the fan blade includes a fan wheel hub (71) and a plurality of fan blades (72), the plurality of fan blades (72) are connected to the fan wheel hub (71), and the plurality of fan blades (72) are arranged around the fan wheel hub (71) at intervals in the circumferential direction.

11. The air duct structure according to claim 10, characterized in that a splitter blade (73) is arranged between two adjacent fan blades (72), and the splitter blade (73) is connected with the fan wheel hub (71).

12. An air conditioner indoor unit, comprising an air duct structure, characterized in that the air duct structure is as claimed in any one of claims 1 to 11.