Installation plate structure, air duct structure and air conditioner indoor unit

Abstract

The present invention provides a mounting plate structure, an air duct structure and an indoor unit of an air conditioner, wherein at least part of the mounting plate structure is located in the air duct, and the mounting plate structure comprises: a mounting plate body, on which a mounting portion for mounting a driving device is provided, and the mounting portion is located in the air duct; a guide portion, connected to the mounting portion, and having a guide surface, so as to guide the airflow toward the center line of the air duct through the guide surface; or to guide the airflow away from the center line of the air duct through the guide surface; and a first-stage guide vane, wherein the first-stage guide vane is provided on the guide portion, and the first-stage guide vane is located in the air duct, so as to rectify the airflow in the air duct through the first-stage guide vane. The mounting plate structure of the present invention solves the problem that the air duct structure in the prior art has a small air volume and a large energy loss.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and in particular to a mounting plate structure, an air duct structure and an air conditioner indoor unit. Background Art

[0002] In order to improve the energy utilization rate of air conditioners and improve human comfort, different air outlet methods are required in different modes. In cooling mode, cold air blows out from the top to achieve a shower-like cooling effect; in heating mode, hot air blows out from the bottom to achieve a carpet-like heating effect. Bath-like cooling and carpet-like heating can more efficiently utilize the gas's own properties and achieve higher energy utilization.

[0003] At present, the three most widely used fan blades in air-conditioning products on the market are centrifugal fan blades, crossflow fan blades and axial flow fan blades. Different fan blade forms need to be configured to meet the model development for different usage requirements and air inlet and outlet methods. However, there is no fan blade and its air duct that can switch the direction of airflow inlet and outlet only by changing the rotation direction of the fan blade, which makes the traditional air-conditioning air inlet only take in air and the air outlet only discharge air. Although the existing distributed air supply technology can realize air supply from the upper and lower air outlets, the lower air outlet (upper air outlet) will also blow out cold air (hot air) during cooling (heating), and the energy utilization rate cannot be optimized. Therefore, there is an urgent need for a duct technology that can realize the switching of the direction of airflow inlet and outlet, so that in cooling mode, air enters from the lower air outlet and blows out from the upper air outlet; in heating mode, air enters from the upper air outlet and blows out from the lower air outlet, so that the energy conversion rate is more efficient and human comfort is improved at the same time.

[0004] In addition, the existing air duct structure causes large eddy losses between air flows, low fan efficiency, and small air output; and when the air flow passes through the mounting plate structure and the driving device in the air duct structure, it will be obstructed by the mounting plate structure and the driving device and generate eddy currents, resulting in large energy loss. Summary of the invention

[0005] The main purpose of the present invention is to provide a mounting plate structure, an air duct structure and an air conditioner indoor unit to solve the problem of small air output and large energy loss of the air duct structure in the prior art.

[0006] In order to achieve the above-mentioned purpose, according to a first aspect of the present invention, a mounting plate structure is provided, at least part of which is located in the air duct, and the mounting plate structure comprises: a mounting plate body, on which a mounting portion for mounting a drive device is provided, and the mounting portion is located in the air duct; a guide portion, connected to the mounting portion, the guide portion having a guide surface, so as to guide the airflow toward the center line of the air duct through the guide surface; or to guide the airflow away from the center line of the air duct through the guide surface; and a first-stage guide vane, wherein the first-stage guide vane is provided on the guide portion, and the first-stage guide vane is located in the air duct, so as to rectify the airflow in the air duct through the first-stage guide vane.

[0007] Furthermore, at least a portion of the guide surface is a conical surface.

[0008] Furthermore, the guide portion includes a first guide portion and a second guide portion, the first guide portion is a conical structure, the second guide portion is a tubular structure, one end of the second guide portion is connected to the mounting portion, and the large diameter end of the first guide portion is connected to the other end of the second guide portion.

[0009] Further, the first-stage guide vane includes a plurality of first-stage guide vane blades, and the plurality of first-stage guide vane blades are arranged at intervals around the circumference of the guide portion.

[0010] Further, the mounting portion has a first accommodating hole, the guide portion has a second accommodating hole, the first accommodating hole and the second accommodating hole are connected to form an accommodating hole, and the accommodating hole is used to accommodate at least part of the driving device.

[0011] Furthermore, a mounting hole is provided on the mounting plate body, the mounting portion is located in the mounting hole and connected to the mounting hole, and a circulation channel is formed between the mounting portion and the hole wall of the mounting hole; so that the airflow passing through the first-stage guide vane flows out from the circulation channel, or the airflow enters the first-stage guide vane after passing through the circulation channel; wherein the mounting portion is connected to the hole wall of the mounting hole through a connecting rib, and at least a portion of the connecting rib is located in the circulation channel.

[0012] Further, the connecting rib is a U-shaped structure, the first-stage guide vane is connected to the bottom of the U-shaped structure, and the first-stage guide vane is located at the bottom of the U-shaped structure on a side away from the opening of the U-shaped structure; or, the connecting rib is a V-shaped structure, the first-stage guide vane is connected to the bottom of the V-shaped structure, and the first-stage guide vane is located at the bottom of the V-shaped structure on a side away from the opening of the V-shaped structure.

[0013] Furthermore, there are multiple connecting ribs, and the multiple connecting ribs are arranged in one-to-one correspondence with the multiple first-stage guide vane blades, and each connecting rib is connected to the corresponding first-stage guide vane blade.

[0014] Further, the multiple first-stage guide vane blades include first-stage guide vane blades and second-stage guide vane blades, there are multiple first-stage guide vane blades, there are multiple second-stage guide vane blades, and the multiple first-stage guide vane blades and the multiple second-stage guide vane blades are alternately arranged around the circumference of the guide portion; wherein, there are multiple connecting ribs, the multiple connecting ribs are arranged one-to-one correspondingly to the multiple first-stage guide vane blades, and each connecting rib is connected to the corresponding first-stage guide vane blade.

[0015] Furthermore, the mounting plate structure also includes: a support member, which is located in the accommodating hole, connected to the hole wall of the accommodating hole and extending toward the mounting plate body; and a guide part reinforcement rib, which is arranged between the support member and the hole wall of the accommodating hole.

[0016] According to a second aspect of the present invention, there is provided an air duct structure, comprising a mounting plate structure, wherein the mounting plate structure is the mounting plate structure mentioned above, and the air duct structure further comprises: an air duct, wherein the air duct extends along a first preset direction; a first-stage fan blade, rotatably arranged in the air duct; a secondary fan blade, rotatably arranged in the air duct, and the secondary fan blade and the first-stage fan blade are arranged at intervals along the first preset direction; wherein the mounting plate structure is connected to the air duct, and at least a portion of the mounting plate structure is located in the air duct, and the mounting plate structure is located between the first-stage fan blade and the secondary fan blade, so that the first-stage guide vane of the mounting plate structure can rectify the gas flowing from the first-stage fan blade to the secondary fan blade; or rectify the gas flowing from the secondary fan blade to the first-stage fan blade.

[0017] Furthermore, the first-stage guide vane is arranged on a side of the mounting plate body of the mounting plate structure close to the first-stage fan blade.

[0018] Furthermore, the air duct structure also includes: a driving device, the driving device includes a driving body, a first driving rod and a second driving rod, at least a portion of the driving body is arranged in the accommodating hole of the mounting plate structure; the driving body has a first driving end and a second driving end that are relatively arranged, the first driving rod extends out of the first driving end, and the first driving rod is used to be connected to the primary fan blade driving; the second driving rod extends out of the second driving end, and the second driving rod is used to be connected to the secondary fan blade driving to drive the primary fan blade and the secondary fan blade to rotate synchronously.

[0019] Furthermore, the air duct has a first air vent and a second air vent that are relatively arranged, and the secondary fan blade is arranged on the side of the primary fan blade close to the second air vent. The air duct structure also includes: a secondary guide vane, which is arranged on the side of the secondary fan blade away from the primary fan blade, so that the gas entering from the second air vent flows into the secondary fan blade after passing through the secondary guide vane, or the gas flowing out of the secondary fan blade flows out of the second air vent after passing through the secondary guide vane.

[0020] Furthermore, the air duct extends in a vertical direction, and the air duct includes a primary air duct and a secondary air duct, and the secondary air duct is connected to the primary air duct and is arranged above the primary air duct; wherein, the primary fan blades and primary guide vanes are arranged in the primary air duct, and the secondary fan blades and secondary guide vanes are arranged in the secondary air duct.

[0021] According to a third aspect of the present invention, an air conditioner indoor unit is provided, comprising an air duct structure, wherein the air duct structure is the above-mentioned air duct structure.

[0022] The mounting plate structure of the present invention includes a mounting plate body and a first-stage guide vane. The mounting portion of the mounting plate body is used to install a driving device. The first-stage guide vane can convert the circumferential motion of the airflow into an axial motion to rectify the airflow in the air duct. On the basis of satisfying the installation of the driving device, the mounting plate structure can also rectify the airflow in the air duct, reduce the eddy loss between the airflows, improve the efficiency of the fan, and increase the air output of the air duct structure. In addition, the mounting plate structure includes a guide portion, which has a guide surface to guide the airflow toward the center line of the air duct through the guide surface; or guide the airflow away from the center line of the air duct through the guide surface, so that the eddy current generated by the airflow passing through the mounting plate structure can be reduced, and the guide vane area can be increased, thereby reducing energy loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0024] Figure 1 A front view of the air duct structure according to the present invention in a bottom-in, top-out air supply mode is shown;

[0025] Figure 2 A cross-sectional view of the air duct structure according to the present invention in a bottom-in and top-out air supply mode is shown;

[0026] Figure 3 It shows a schematic structural diagram of the air duct structure according to the present invention in a top-in and bottom-out air supply mode;

[0027] Figure 4 A cross-sectional view of the air duct structure according to the present invention in a top-in and bottom-out air supply mode is shown;

[0028] Figure 5 A three-dimensional diagram of the air duct structure according to the present invention in a bottom-in and top-out air supply mode is shown;

[0029] Figure 6 A three-dimensional diagram of the air duct structure according to the present invention in a top-in and bottom-out air supply mode is shown;

[0030] Figure 7A perspective view showing a guide vane of an air duct structure according to the present invention;

[0031] Figure 8 A perspective view showing an embodiment of a fan blade of the wind duct structure according to the present invention;

[0032] Fig. 9 A front view of an embodiment of a fan blade of the wind duct structure according to the present invention is shown;

[0033] Fig.10 A perspective view showing another embodiment of a wind blade of the wind duct structure according to the present invention;

[0034] Fig.11 A front view showing another embodiment of a fan blade of the wind duct structure according to the present invention;

[0035] Fig.12 It shows the flow direction of the airflow in the fan blade when the air duct structure according to the present invention is in the bottom-in and top-out air supply mode;

[0036] Fig.13 It shows the flow direction of the airflow in the fan blade when the air duct structure according to the present invention is in the top-in and bottom-out air supply mode;

[0037] Fig.14 A structural schematic diagram showing an angle of the mounting plate structure according to the present invention;

[0038] Fig.15 Shows a top view of the mounting plate structure according to the present invention;

[0039] Fig.16 A structural schematic diagram showing another angle of the mounting plate structure according to the present invention;

[0040] Fig.17 A bottom view of the mounting plate structure according to the present invention is shown;

[0041] Fig.18 Shows Figure 2 A partial enlarged view of the air duct structure.

[0042] The above drawings include the following reference numerals:

[0043] 11. air duct; 111. first vent; 112. second vent; 113. primary air duct; 114. secondary air duct; 12. primary fan blade; 13. secondary fan blade; 14. primary guide vane; 142. primary guide vane blade; 143. receiving hole; 145. guide part reinforcement rib; 146. support member; 15. mounting plate body; 151. mounting part; 1511. first receiving hole; 152. mounting hole; 153 , connecting ribs; 154, circulation channel; 20, driving device; 21, driving body; 22, first driving rod; 23, second driving rod; 16, secondary guide vane; 161, second connecting portion; 162, secondary guide vane blade; 17, guide portion; 171, guide surface; 172, first guide portion; 173, second guide portion; 174, second accommodating hole; 71, fan wheel hub; 72, fan blade; 73, splitter blade. DETAILED DESCRIPTION

[0044] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0045] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0046] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0047] The present invention provides a mounting plate structure, please refer to Figures 1 to 18 At least part of the mounting plate structure is located in the air duct 11, and the mounting plate structure includes: a mounting plate body 15, on which a mounting portion 151 for mounting the drive device 20 is provided, and the mounting portion 151 is located in the air duct 11; a guide portion 17, which is connected to the mounting portion 151, and the guide portion 17 has a guide surface 171, so as to guide the airflow toward the center line of the air duct 11 through the guide surface 171; or guide the airflow away from the center line of the air duct 11 through the guide surface 171; a first-stage guide vane 14, which is arranged on the guide portion 17, and the first-stage guide vane 14 is located in the air duct 11, so as to rectify the airflow located in the air duct 11 through the first-stage guide vane 14.

[0048] The mounting plate structure of the present invention includes a mounting plate body 15 and a first-stage guide vane 14. The mounting portion 151 of the mounting plate body 15 is used to install the driving device 20. The first-stage guide vane 14 can convert the circumferential motion of the airflow into axial motion to rectify the airflow in the air duct 11. On the basis of satisfying the installation of the driving device 20, the mounting plate structure can also realize the rectification of the airflow in the air duct 11, reduce the eddy loss between the airflows, improve the efficiency of the fan, and increase the air output of the air duct structure. In addition, the mounting plate structure includes a guide portion 17, and the guide portion 17 has a guide surface 171, so as to guide the airflow toward the center line of the air duct 11 through the guide surface 171; or guide the airflow away from the center line of the air duct 11 through the guide surface 171, so as to reduce the eddy current generated by the airflow passing through the mounting plate structure, increase the guide vane area, and thus reduce energy loss.

[0049] In specific implementation, after the airflow passes through the fan blades of the present invention, axial airflow, radial airflow and circumferential airflow will be generated. The circumferential airflow will generate vortices in the air duct, and then generate vortex losses. The circumferential motion of the airflow is converted into axial motion through the guide vanes, and part of the radial airflow is converted into axial motion airflow, which plays a role of rectification.

[0050] In a specific implementation, at least a portion of the guide surface 171 is a conical surface. Such a configuration can guide airflow within a larger range.

[0051] In this embodiment, the guide portion 17 includes a first guide portion 172 and a second guide portion 173. The first guide portion 172 is a conical structure, the second guide portion 173 is a tubular structure, one end of the second guide portion 173 is connected to the mounting portion 151, and the large diameter end of the first guide portion 172 is connected to the other end of the second guide portion 173.

[0052] When the airflow passes through the first guide portion 172 first and then the second guide portion 173, the guide surface 171 guides the airflow away from the center line of the air duct 11; when the airflow passes through the second guide portion 173 first and then the first guide portion 172, the guide surface 171 guides the airflow toward the center line of the air duct 11.

[0053] In a specific implementation, the first-stage guide vane 14 includes a plurality of first-stage guide vane blades 142 , and the plurality of first-stage guide vane blades 142 are arranged at intervals around the circumference of the guide portion 17 .

[0054] In order to accommodate the driving device 20, the mounting portion 151 has a first accommodating hole 1511, and the air guide portion 17 has a second accommodating hole 174. The first accommodating hole 1511 and the second accommodating hole 174 are connected to form an accommodating hole 143, and the accommodating hole 143 is used to accommodate at least part of the driving device 20. Such a configuration can also prevent the driving device 20 from obstructing the airflow and avoiding the generation of vortices.

[0055] In specific implementation, a mounting hole 152 is provided on the mounting plate body 15, the mounting portion 151 is located in the mounting hole 152 and connected to the mounting hole 152, and a flow channel 154 is formed between the mounting portion 151 and the hole wall of the mounting hole 152; so that the airflow passing through the first-stage guide vane 14 flows out from the flow channel 154, or the airflow enters the first-stage guide vane 14 after passing through the flow channel 154; wherein, the mounting portion 151 is connected to the hole wall of the mounting hole 152 through a connecting rib 153, and at least part of the connecting rib 153 is located in the flow channel 154. Such a setting can achieve the flow of airflow on the basis of ensuring the overall strength of the mounting plate body 15.

[0056] In one embodiment, the connecting rib 153 is a U-shaped structure having an opening and a bottom plate arranged opposite to each other, and the first-stage guide vane 14 is connected to the bottom plate and is located on a side of the bottom plate away from the opening. Such an arrangement further improves the overall strength of the mounting plate body 15.

[0057] In another embodiment, the connecting rib 153 is a V-shaped structure, the first-stage guide vane 14 is connected to the bottom of the V-shaped structure, and the first-stage guide vane 14 is located on a side of the bottom of the V-shaped structure away from the opening of the V-shaped structure.

[0058] Preferably, there are multiple connecting ribs 153, and the multiple connecting ribs 153 are arranged one-to-one correspondingly to the multiple first-stage guide vane blades 142, and each connecting rib 153 is connected to the corresponding first-stage guide vane blade 142. Such an arrangement further improves the overall strength of the mounting plate body 15.

[0059] Preferably, the plurality of primary guide vane blades 142 include first primary guide vane blades and second primary guide vane blades, there are a plurality of first primary guide vane blades, there are a plurality of second primary guide vane blades, and the plurality of first primary guide vane blades and the plurality of second primary guide vane blades are alternately arranged around the circumference of the guide portion 17; wherein, there are a plurality of connecting ribs 153, the plurality of connecting ribs 153 are arranged one-to-one with the plurality of first primary guide vane blades, and each connecting rib 153 is connected to the corresponding first primary guide vane blade. Such an arrangement further improves the overall strength of the mounting plate body 15, and has a better guide effect.

[0060] In this embodiment, the mounting plate structure further includes a support member 146, which is located in the receiving hole 143, connected to the hole wall of the receiving hole 143 and extending toward the mounting plate body 15; and a guide portion reinforcement rib 145, which is arranged between the support member 146 and the hole wall of the receiving hole 143. Such an arrangement improves the strength of the guide portion 17.

[0061] In a specific implementation, the support member 146 is disposed on the first air guide portion 172, and the support member 146 is integrally formed with the first air guide portion 172. Preferably, the support member 146 is a tubular structure, and the motor shaft passes through the tubular structure.

[0062] The present invention also provides an air duct structure, including a mounting plate structure, wherein the mounting plate structure is the mounting plate structure in the above-mentioned embodiment, and the air duct structure also includes: an air duct 11, the air duct 11 extends along a first preset direction; a first-stage fan blade 12, rotatably arranged in the air duct 11; a secondary fan blade 13, rotatably arranged in the air duct 11, and the secondary fan blade 13 and the first-stage fan blade 12 are spaced apart along the first preset direction; wherein the mounting plate structure is connected to the air duct 11, at least a part of the mounting plate structure is located in the air duct 11, and the mounting plate structure is located between the first-stage fan blade 12 and the secondary fan blade 13, so that the first-stage guide vane 14 of the mounting plate structure can rectify the gas flowing from the first-stage fan blade 12 to the secondary fan blade 13; or rectify the gas flowing from the secondary fan blade 13 to the first-stage fan blade 12.

[0063] In specific implementation, the first-stage guide vane 14 is arranged on a side of the mounting plate body 15 of the mounting plate structure close to the first-stage fan blade 12. Such an arrangement facilitates the layout in the air duct and ensures the rectifying effect of the first-stage guide vane 14.

[0064] In order to drive the primary fan blades 12 and the secondary fan blades 13, the air duct structure also includes a driving device 20, which includes a driving body 21, a first driving rod 22 and a second driving rod 23. At least a portion of the driving body 21 is arranged in the accommodating hole 143 of the mounting plate structure; the driving body 21 has a first driving end and a second driving end that are relatively arranged, the first driving rod 22 extends out of the first driving end, and the first driving rod 22 is used to be driven and connected to the primary fan blades 12; the second driving rod 23 extends out of the second driving end, and the second driving rod 23 is used to be driven and connected to the secondary fan blades 13, so as to drive the primary fan blades 12 and the secondary fan blades 13 to rotate synchronously.

[0065] During specific implementation, the air duct structure includes a fan, and the fan includes blades and a driving device.

[0066] Preferably, the driving device 20 is a motor.

[0067] In this embodiment, the air duct 11 has a first air vent 111 and a second air vent 112 that are relatively arranged, and the secondary fan blade 13 is arranged on the side of the primary fan blade 12 close to the second air vent 112. The air duct structure also includes a secondary guide vane 16, which is arranged on the side of the secondary fan blade 13 away from the primary fan blade 12, so that the gas entering through the second air vent 112 flows into the secondary fan blade 13 after passing through the secondary guide vane 16, or the gas flowing out of the secondary fan blade 13 passes through the secondary guide vane 16 and then flows out of the second air vent 112.

[0068] In a specific implementation, the secondary guide vane 16 includes a second connection portion 161 and a plurality of secondary guide vane blades 162 , wherein the plurality of secondary guide vane blades 162 are arranged at circumferential intervals around the second connection portion 161 ; wherein one end of the plurality of secondary guide vane blades 162 away from the second connection portion 161 contacts the inner wall of the air duct 11 .

[0069] In this embodiment, the air duct 11 extends in the vertical direction, and the air duct 11 includes a primary air duct 113 and a secondary air duct 114, and the secondary air duct 114 is connected to the primary air duct 113 and is arranged above the primary air duct 113; wherein the primary fan blades 12 and the primary guide vanes 14 are arranged in the primary air duct 113, and the secondary fan blades 13 and the secondary guide vanes 16 are arranged in the secondary air duct 114.

[0070] In this embodiment, the primary fan blade 12 and the secondary fan blade 13 are both fan blades, and the fan blades include a first end and a second end that are relatively arranged, and the fan blades include a fan blade hub 71 and a plurality of fan blades 72, and the plurality of fan blades 72 are all connected to the fan blade hub 71, and the plurality of fan blades 72 are arranged at intervals around the circumference of the fan blade hub 71; wherein, a diverter blade 73 is arranged between two adjacent fan blades 72, and the diverter blade 73 is connected to the fan blade hub 71. In a specific implementation, there is a guide channel between two adjacent fan blades 72, so that the airflow flows out from the circumference of the guide channel. The centrifugal effect of the fan blade is enhanced, and the airflow can flow from the first side of the fan blade to the second side, and can also flow from the second side of the fan blade to the first side; in addition, the setting of the diverter blade 73 avoids the generation of vortices when the interval between the two fan blades is large.

[0071] The inventive point of the air duct structure of the present invention is: using a new type of mixed flow fan blade (the mixed flow fan blade has no fan blade outer ring), placing two fan blades in the same direction in the air duct respectively, and by adjusting the rotation direction of the fan blade and matching the corresponding air duct profile, two modes of switching the inlet and outlet directions of the airflow, namely bottom-in-top-out and top-in-bottom-out, can be realized. The first-stage guide vane and the guide part are added to the mounting plate structure. The mounting plate structure can have a rectifying effect on the airflow while satisfying the motor installation and fixing function. The guide part added to the lower part of the mounting plate structure is connected to the first-stage guide vane blade. This structure can guide the airflow, so that the airflow is gathered at the guide vane blade, and at the same time, the guide vane area is increased, reducing energy loss.

[0072] In specific implementation, the duct line can be changed. When the airflow enters from the bottom and exits from the top, the duct line changes to Figure 1 and Figure 2 As shown, when the airflow enters from the top and exits from the bottom, the duct line changes to Figure 3 and Figure 4 shown.

[0073] The specific implementation of the present invention is:

[0074] The two-stage mixed flow duct can switch the inlet and outlet directions of the airflow to achieve two air supply modes: up-in and down-out or down-in and up-out. The new mixed flow fan blade has a wide blade and no outer sealing ring. It is available in two forms: with splitter blades and without splitter blades. The fan blade can achieve two effects in the axial direction and the centrifugal direction during its working process. Figures 1 to 4 The air duct structure shown can realize two air supply modes: top-in and bottom-out or bottom-in and top-out.

[0075] In cooling mode, the air conditioner adopts the bottom-in and top-out air supply mode, such as Figure 1 and 2 As shown, at this time, both levels of fan blades rotate counterclockwise (top view). The airflow enters from the lower end of the first-stage duct fan blade, blows out from the first-stage fan blade, and passes through the mounting plate structure with the first-stage guide vane. The mounting plate structure can rectify the airflow blown out from the first-stage fan blade while meeting the function of fixing the motor, and converts the circumferential motion of the airflow into axial motion to reduce eddy current losses between airflows. The rectified airflow enters the secondary air duct from the lower end of the secondary fan blade, and after the secondary fan blade does work for the second time, it is blown out from the upper end of the secondary fan blade and then rectified for the second time by the secondary guide vane before being blown out of the air duct, thereby realizing the bottom-in and top-out air supply mode. The flow direction of the airflow inside the fan blade can be seen. Fig.12 Upward airflow direction shown.

[0076] In heating mode, the air conditioner adopts the top-in and bottom-out air supply mode, such as Figure 3 and Figure 4 As shown, at this time, both stages of the fan blades rotate clockwise (top view). After the airflow enters the air duct from the constriction of the secondary air duct, it first passes through the secondary guide vanes. At this time, the guide vanes play a dual role of inlet pre-rotation and rectification. After the secondary fan blades work, it passes through the mounting plate structure with the first-stage guide vanes. The first-stage guide vanes can rectify the airflow blown out from the secondary fan blades, and convert the circumferential motion of the airflow into axial motion to reduce eddy current losses between airflows. The rectified airflow enters the first-stage air duct from the upper end of the first-stage fan blades. After the first-stage fan blades work twice, it is finally blown out of the air duct from the lower end of the first-stage fan blades, realizing a top-in, bottom-out air supply mode. The flow direction of the airflow inside the fan blades can be seen. Fig.13 Downward airflow direction shown.

[0077] Two new mixed flow fans are arranged in the upper and lower parts of the two-stage mixed flow duct. The fans include blades and motors. The fans are placed in the same direction. This method can increase the working capacity of the blades. A mounting plate structure with a first-stage guide vane is added between the first-stage blades and the secondary blades. The mounting plate structure can not only meet the function of fixing the motor, but also play the role of rectifying the airflow between the blades. The guide vane structure added at the upper end of the secondary blade can play the role of outlet rectification and inlet pre-rotation in two modes. The added guide vane structure can change the direction of the airflow from circumferential motion to axial motion, reduce the vortex loss between the airflow, greatly improve the efficiency of the fan, and increase the air output.

[0078] The two-stage mixed flow air duct can realize the secondary working process of the fan, which can increase the working capacity of the entire fan. Taking the bottom-in and top-out as an example, after the first-stage fan blades work, they are rectified by the mounting plate structure with the first-stage guide vanes, which can reduce the eddy loss between the airflows. After that, the secondary work of the secondary fan blades can greatly improve the working capacity of the fan, and the two-stage mixed flow air duct can also play a secondary pressurization effect. Therefore, the two-stage mixed flow air duct with the guide vane structure can greatly increase the air output and reduce the energy loss of the fan. At the same time, its greater pressurization effect can overcome greater resistance, and it is applied to air conditioners with two air supply modes of top-in and bottom-out or bottom-in and top-out, with significant results.

[0079] The mounting plate structure of the present invention, after setting the guide part, the mounting plate structure with the first-stage guide vane can not only install and fix the motor, but the first-stage guide vane blades distributed thereon can also have a rectifying effect on the airflow. Compared with the mounting plate structure with only the guide vanes added, the mounting plate structure adds a guide part at the bottom, and the guide part is connected to the first-stage guide vane blades. This structure can guide the airflow, so that the airflow is gathered to the first-stage guide vane blades, and at the same time, the guide vane area is increased, and energy loss is reduced. The two-stage mixed flow air duct technology is becoming more and more mature. In addition to meeting the basic functions of motor installation and fixing and airflow passing, its rectifying and guiding functions are optimized, which greatly reduces the airflow vortex loss and energy loss, and its beneficial effects are very significant.

[0080] In specific implementation, the bottom-in-top-out air supply mode is not limited to the cooling mode, and the top-in-bottom-out air supply mode is not limited to the heating mode; the two-stage mixed flow air duct technology is not limited to the air-conditioning industry.

[0081] The air duct structure of the present invention solves:

[0082] 1. Air duct technology that can switch the inlet and outlet directions of airflow.

[0083] 2. Compared with the single-stage mixed flow duct, the two-stage mixed flow duct can greatly increase the air volume and achieve the effect of secondary pressurization.

[0084] 3. The mounting plate structure with guide vanes between the two-stage mixed flow blades and the secondary guide vanes above the secondary blades can change the direction of the airflow from circumferential motion to axial motion, reduce eddy current losses between airflows, and improve fan efficiency. Combining the mounting plate structure with the guide vanes can achieve a rectifying effect on the airflow while satisfying the motor installation and fixation. This patent creatively adds a guide part at the bottom of the motor mounting plate, which is connected to the first-stage guide vanes, and can guide the airflow, increase the guide vane area, and reduce energy loss.

[0085] The present invention further provides an air conditioner indoor unit, comprising an air duct structure, wherein the air duct structure is the air duct structure in the above embodiment.

[0086] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0087] The mounting plate structure of the present invention includes a mounting plate body 15 and a first-stage guide vane 14. The mounting portion 151 of the mounting plate body 15 is used to install the drive device 20. The first-stage guide vane 14 can convert the circumferential motion of the airflow into axial motion to rectify the airflow in the air duct 11. On the basis of satisfying the installation of the drive device 20, the mounting plate structure can also realize the rectification of the airflow in the air duct 11, reduce the eddy loss between the airflows, improve the efficiency of the fan, and increase the air output of the air duct structure. In addition, the mounting plate structure includes a guide portion 17, and the guide portion 17 has a guide surface 171, so as to guide the airflow toward the center line of the air duct 11 through the guide surface 171; or guide the airflow away from the center line of the air duct 11 through the guide surface 171, so as to reduce the eddy current generated by the airflow passing through the mounting plate structure and reduce energy loss.

[0088] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A mounting plate structure, wherein at least part of the mounting plate structure is located in an air duct (11), characterized in that: The mounting plate structure comprises: A mounting plate body (15), wherein a mounting portion (151) for mounting a driving device (20) is provided on the mounting plate body (15), and the mounting portion (151) is located in the air duct (11); a flow guide portion (17) connected to the mounting portion (151), the flow guide portion (17) having a flow guide surface (171) for guiding the airflow toward the center line of the air duct (11) through the flow guide surface (171); or guiding the airflow away from the center line of the air duct (11) through the flow guide surface (171); a first-stage guide vane (14), the first-stage guide vane (14) being arranged on the guide portion (17), the first-stage guide vane (14) being located in the air duct (11), so as to rectify the airflow in the air duct (11) through the first-stage guide vane (14); The first-stage guide vane (14) comprises a plurality of first-stage guide vane blades (142), and the plurality of first-stage guide vane blades (142) are arranged at intervals in the circumferential direction of the guide portion (17); The mounting plate body (15) is provided with a mounting hole (152), the mounting portion (151) is located in the mounting hole (152) and connected to the mounting hole (152), and a flow channel (154) is formed between the mounting portion (151) and a hole wall of the mounting hole (152); so that the airflow passing through the first-stage guide vane (14) flows out through the flow channel (154), or the airflow enters the first-stage guide vane (14) after passing through the flow channel (154); The mounting portion (151) is connected to the hole wall of the mounting hole (152) via a connecting rib (153), and at least a portion of the connecting rib (153) is located in the circulation channel (154); The connecting rib (153) is a U-shaped structure, the first-stage guide vane (14) is connected to the bottom of the U-shaped structure, and the first-stage guide vane (14) is located at a side of the bottom of the U-shaped structure away from the opening of the U-shaped structure; or, the connecting rib (153) is a V-shaped structure, the first-stage guide vane (14) is connected to the bottom of the V-shaped structure, and the first-stage guide vane (14) is located at a side of the bottom of the V-shaped structure away from the opening of the V-shaped structure.

2. The mounting plate structure according to claim 1, characterized in that: At least a portion of the flow guide surface (171) is a conical surface.

3. The mounting plate structure according to claim 1, characterized in that: The flow guide portion (17) comprises a first flow guide portion (172) and a second flow guide portion (173); the first flow guide portion (172) is a conical structure; the second flow guide portion (173) is a tubular structure; one end of the second flow guide portion (173) is connected to the mounting portion (151); and the large-diameter end of the first flow guide portion (172) is connected to the other end of the second flow guide portion (173).

4. The mounting plate structure according to claim 1, characterized in that: The mounting portion (151) has a first accommodating hole (1511), the air guide portion (17) has a second accommodating hole (174), the first accommodating hole (1511) and the second accommodating hole (174) being connected to form an accommodating hole (143), the accommodating hole (143) being used to accommodate at least part of the driving device (20).

5. The mounting plate structure according to claim 1, characterized in that: There are a plurality of connecting ribs (153), and the plurality of connecting ribs (153) are arranged in one-to-one correspondence with the plurality of first-stage guide vane blades (142), and each connecting rib (153) is connected to a corresponding first-stage guide vane blade (142).

6. The mounting plate structure according to claim 1, characterized in that: The plurality of first-stage guide vane blades (142) include first-stage guide vane blades and second-stage guide vane blades, the number of the first-stage guide vane blades is plurality, the number of the second-stage guide vane blades is plurality, and the plurality of the first-stage guide vane blades and the plurality of the second-stage guide vane blades are alternately arranged around the circumference of the guide portion (17); wherein the plurality of connecting ribs (153) are plurality, the plurality of connecting ribs (153) are arranged in one-to-one correspondence with the plurality of the first-stage guide vane blades, and each of the connecting ribs (153) is connected to a corresponding first-stage guide vane blade.

7. The mounting plate structure according to claim 4, characterized in that: The mounting plate structure also includes: A support member (146), the support member (146) being located in the accommodating hole (143), the support member (146) being connected to a hole wall of the accommodating hole (143) and extending toward the mounting plate body (15); A flow guide portion reinforcement rib (145), wherein the flow guide portion reinforcement rib (145) is arranged between the support member (146) and the hole wall of the accommodating hole (143).

8. An air duct structure, comprising a mounting plate structure, characterized in that: The mounting plate structure is the mounting plate structure according to any one of claims 1 to 7, and the air duct structure further comprises: An air duct (11), the air duct (11) extending along a first preset direction; A first-stage fan blade (12) rotatably disposed in the air duct (11); A secondary fan blade (13) is rotatably arranged in the air duct (11), and the secondary fan blade (13) and the primary fan blade (12) are arranged at intervals along the first preset direction; The mounting plate structure is connected to the air duct (11), at least a portion of the mounting plate structure is located in the air duct (11), and the mounting plate structure is located between the primary fan blades (12) and the secondary fan blades (13), so that the primary guide vanes (14) of the mounting plate structure rectify the gas flowing from the primary fan blades (12) to the secondary fan blades (13); or rectify the gas flowing from the secondary fan blades (13) to the primary fan blades (12).

9. The air duct structure according to claim 8, characterized in that: The first-stage guide vane (14) is arranged on a side of the mounting plate body (15) of the mounting plate structure close to the first-stage fan blade (12).

10. The air duct structure according to claim 8, characterized in that: The mounting plate structure is the mounting plate structure according to claim 4, and the air duct structure further comprises: A driving device (20), the driving device (20) comprising a driving body (21), a first driving rod (22) and a second driving rod (23), wherein at least a portion of the driving body (21) is disposed in a receiving hole (143) of the mounting plate structure; the driving body (21) has a first driving end and a second driving end that are disposed opposite to each other, the first driving rod (22) extending out of the first driving end, and the first driving rod (22) is used for driving connection with a primary fan blade (12); the second driving rod (23) extending out of the second driving end, and the second driving rod (23) is used for driving connection with a secondary fan blade (13), so as to drive the primary fan blade (12) and the secondary fan blade (13) to rotate synchronously.

11. The air duct structure according to claim 8, characterized in that: The air duct (11) has a first air vent (111) and a second air vent (112) arranged opposite to each other, the secondary fan blade (13) is arranged on a side of the primary fan blade (12) close to the second air vent (112), and the air duct structure further comprises: The secondary guide vane (16) is arranged on a side of the secondary fan blade (13) away from the primary fan blade (12), so that the gas entering through the second air vent (112) flows into the secondary fan blade (13) after passing through the secondary guide vane (16), or the gas flowing out of the secondary fan blade (13) flows out through the second air vent (112) after passing through the secondary guide vane (16).

12. The air duct structure according to claim 11, characterized in that: The air duct (11) extends in a vertical direction, and the air duct (11) comprises a primary air duct (113) and a secondary air duct (114), wherein the secondary air duct (114) is connected to the primary air duct (113) and is arranged above the primary air duct (113); The primary fan blades (12) and the primary guide vanes (14) are arranged in the primary air duct (113), and the secondary fan blades (13) and the secondary guide vanes (16) are arranged in the secondary air duct (114).

13. An air conditioner indoor unit, comprising an air duct structure, characterized in that: The air duct structure is the air duct structure according to any one of claims 8 to 12.

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