Air conditioner and air duct assembly thereof

Abstract

The application provides an air conditioner and a wind channel assembly thereof. The wind channel assembly comprises a diffuser, a flow dividing block and a flow guiding grid. The diffuser is downstream of a cross-flow fan of the air conditioner and is formed between a volute side profile and a volute tongue side profile. The flow dividing block is at an outlet side of the diffuser to form a first air supply channel and a second air supply channel downstream of the diffuser. The flow guiding grid is in the diffuser. The flow guiding grid comprises at least three flow guiding plates spaced along a width direction of the diffuser to form at least two grid channels. Each grid channel is configured to guide the air outflow of the diffuser to the first air supply channel and the second air supply channel. The wind channel assembly can avoid or reduce the air outflow directly hitting the flow dividing block, thereby reducing wind loss and energy loss, achieving the effects of improving the air supply volume of the air conditioner and reducing the energy consumption of the air conditioner.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of air conditioning technology, in particular to an air conditioner and a wind channel assembly thereof. BACKGROUND

[0002] Air conditioners with double air outlets usually correspond to two cross-flow fans to improve air volume and form wide-angle air supply, but will result in large size and high cost of air conditioners. To solve this problem, the prior art proposes an improved scheme of single cross-flow fan double air outlet, which sets a flow dividing block in the wind channel downstream of a cross-flow fan to forcibly divide and guide the air flow to two air supply wind channels and then blow out from two air outlets. The air flow in the wind channel of the improved scheme will directly "hit" the flow dividing block, causing large wind loss and affecting the air supply volume and energy consumption of the air conditioner. SUMMARY

[0003] In view of the above problems, the present application is proposed to provide an air conditioner and a wind channel assembly thereof that overcome the above problems or at least partially solve the above problems, aiming to solve the problem of large wind loss of air flow in the wind channel of the existing single cross-flow fan double air outlet air conditioner.

[0004] Specifically, the present application provides the following technical solutions:

[0005] A wind channel assembly of an air conditioner, comprising an expansion wind channel, a flow dividing block and a flow guiding grid.

[0006] The expansion wind channel is downstream of a cross-flow fan of the air conditioner and is formed between a volute side profile and a volute tongue side profile.

[0007] The flow dividing block is at the outlet side of the expansion wind channel to form a first air supply wind channel and a second air supply wind channel downstream of the expansion wind channel.

[0008] The flow guiding grid is in the expansion wind channel. The flow guiding grid comprises at least three flow guiding plates spaced apart along the width direction of the expansion wind channel to form at least two grid wind channels. Each of the grid wind channels is configured to divide and guide the air flow of the expansion wind channel to the first air supply wind channel and the second air supply wind channel.

[0009] Optionally, the first air supply wind channel is formed between the volute side profile and the flow dividing block. The second air supply wind channel is formed between the flow dividing block and the volute tongue side profile.

[0010] The grille air ducts, into which the diffuser air ducts are guided, are first grille air ducts. The grille air ducts, into which the diffuser air ducts are guided, are second grille air ducts. The guide vanes, close to the volute side surface, and the volute side surface form a first shunt air duct. The guide vanes, close to the volute tongue side surface, and the volute tongue side surface form a second shunt air duct.

[0011] The sum of the inlet side widths of the first grille air ducts and the first shunt air duct is greater than the sum of the inlet side widths of the second grille air ducts and the second shunt air duct.

[0012] Optionally, the first air supply duct is formed between the volute side surface and the shunt block. The second air supply duct is formed between the shunt block and the volute tongue side surface.

[0013] The grille air ducts, into which the diffuser air ducts are guided, are first grille air ducts. The grille air ducts, into which the diffuser air ducts are guided, are second grille air ducts.

[0014] The sum of the inlet side widths of the first grille air ducts is greater than the sum of the inlet side widths of the second grille air ducts.

[0015] Optionally, the first grille air ducts are at least two.

[0016] The inlet side width of any first grille air duct is less than the outlet side width. In adjacent two first grille air ducts, the ratio of the outlet side width to the inlet side width of the first grille air duct close to the volute side surface is less than the ratio of the outlet side width to the inlet side width of the first grille air duct close to the volute tongue side surface.

[0017] Optionally, the first grille air ducts are at least two.

[0018] Any first grille air duct is in the shape of a bell mouth. In adjacent two first grille air ducts, the divergence angle of the first grille air duct close to the volute side surface is less than the divergence angle of the first grille air duct close to the volute tongue side surface.

[0019] Optionally, the guide grille comprises five guide vanes to form two first grille air ducts and two second grille air ducts.

[0020] Optionally, the volute side surface comprises a first arc segment towards the volute tongue side surface.

[0021] Each guide vane forming the first grille air duct comprises a second arc segment protruding towards the volute tongue side surface.

[0022] Optionally, the flow splitting block is wedge-shaped, and the tip of the wedge is located on the outlet side of the diffuser duct to form a flow splitting end.

[0023] An upstream side of the flow splitting end of the flow splitting block is provided with a flow guide plate along the outflow direction of the diffuser duct.

[0024] Optionally, two sides of the flow guide plate upstream of the flow splitting end form the first and second grating ducts, respectively.

[0025] The flow guide plate upstream of the flow splitting end comprises a second arc-shaped section protruding towards the volute tongue side profile.

[0026] Optionally, the second grating ducts are at least two.

[0027] Any of the second grating ducts is flared. In adjacent two of the second grating ducts, the divergence angle of the second grating duct closer to the volute side profile is greater than that of the second grating duct closer to the volute tongue side profile.

[0028] Optionally, the spacing between the windward end of any of the flow guide plates and the inlet side of the diffuser duct is greater than the spacing between the leeward end of the flow guide plate and the outlet side of the diffuser duct.

[0029] In another aspect, the application also provides an air conditioner comprising a cross-flow fan and the above-mentioned air duct assembly. The air duct assembly is arranged downstream of the cross-flow fan.

[0030] The air duct assembly of the application is arranged in the diffuser duct between the cross-flow fan and two air supply ducts, and the flow guide grating comprises flow guide plates forming at least two grating ducts. The outflow air flow in the diffuser duct is split and guided, and then enters the two air supply ducts, respectively. By arranging the flow guide grating, the outflow air flow can be prevented or reduced from directly "hitting" the flow splitting block, thereby reducing wind loss and energy loss, and achieving the effects of improving the air supply volume of the air conditioner and reducing the energy consumption of the air conditioner.

[0031] The above and other objects, advantages and features of the application will become more apparent from the following detailed description of some embodiments thereof, taken in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0032] Some specific embodiments of the application will be described in detail below with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar components or parts. It should be understood by those skilled in the art that the drawings are not necessarily drawn to scale. In the drawings:

[0033] Figure 1This is a schematic cross-sectional view of an air conditioner according to an embodiment of the present invention;

[0034] Figure 2 This is a schematic partial cross-sectional view of an air conditioner according to an embodiment of the present invention;

[0035] Figure 3 This is a schematic partial cross-sectional view of an air conditioner according to an embodiment of the present invention;

[0036] Figure 4 This is a schematic partial cross-sectional view of an air conditioner according to an embodiment of the present invention;

[0037] Figure 5 This is a schematic partial cross-sectional view of an air conditioner according to an embodiment of the present invention.

[0038] List of reference numerals in the attached diagram:

[0039] 100. Air duct assembly; 110. Diffuser duct; 111. Inlet side of diffuser duct; 112. Outlet side of diffuser duct; 120. Diverter block; 121. Diverter end; 131. Guide plate; 1311. Windward end; 1312. Leeward end; 1313. Second arc-shaped section; 141. First air supply duct; 142. Second air supply duct; 151. First grille duct; 152. Second grille duct; 161. First diverter duct; 162. Second diverter duct; 200. Cross-flow impeller; 310. Volute side profile; 311. First arc-shaped section; 320. Volute tongue side profile. Detailed Implementation

[0040] The following reference Figures 1 to 5 This invention describes an air conditioner and its duct assembly according to embodiments of the present invention. In this description, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature, that is, include one or more of that feature. In the description of the present invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. When a feature "includes or contains" one or more of the features it encompasses, unless otherwise specifically described, this indicates that other features are not excluded and may be further included.

[0041] Unless otherwise defined, the terms "set", "mounted", "connected", "linking", "fixed", "coupled" and the like shall be broadly interpreted, for example, they can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through intermediate medium; can be internal connection of two elements, or interaction relationship of two elements, unless otherwise explicitly defined. Those skilled in the art should be able to understand the specific meaning of the above terms in the present application according to the specific circumstances.

[0042] In addition, in the description of the present embodiment, the first feature "above" or "below" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. That is, in the description of the present embodiment, the first feature "above", "over" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is higher in horizontal height than the second feature. The first feature "below", "under" or "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the first feature is lower in horizontal height than the second feature.

[0043] In the description of the present embodiment, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0044] Figure 1 is a schematic sectional view of an air conditioner according to an embodiment of the present application, as Figure 1 shown, and referring to Figures 2-5 The embodiment of the present application provides an air duct assembly of an air conditioner, and the air duct assembly 100 comprises a diffuser 110, a flow dividing block 120 and a flow guiding grid.

[0045] The diffuser 110 is downstream of a cross-flow impeller 200 of the air conditioner, and is formed between a volute side profile 310 and a volute tongue side profile 320.

[0046] The flow dividing block 120 is at an outlet side 112 of the diffuser, so as to form a first air supply duct 141 and a second air supply duct 142 downstream of the diffuser 110.

[0047] The flow guide grid is located in the diffuser duct 110. The flow guide grid comprises at least three flow guide plates 131 arranged at intervals along the width direction of the diffuser duct 110 to form at least two grid ducts (151 / 152). Each grid duct is configured to guide the outflow of the diffuser duct 110 to the first air supply duct 141 and the second air supply duct 142.

[0048] In the embodiment, the air conditioner can be a floor standing air conditioner, a wall-mounted air conditioner, an embedded air conditioner, etc. with a cross-flow fan wheel 200. The air duct of the air conditioner with the cross-flow fan wheel 200 generally sequentially has an air inlet, a cross-flow duct, a diffuser duct 110, an air supply duct, and an air outlet. The cross-flow fan wheel 200 is installed in the cross-flow duct, and the heat exchanger of the air conditioner can be arranged between the air inlet and the cross-flow fan wheel 200 or between the cross-flow fan wheel 200 and the air outlet.

[0049] The cross-flow fan wheel 200 is generally arranged between the volute and the volute tongue. The inner wall of the volute can be a volute side profile 310, which generally extends from the cross-flow duct to the air outlet. The inner wall of the volute tongue can be a volute tongue side profile 320, which generally extends from the cross-flow duct to the air outlet. The cross-flow fan wheel 200 is located in the cross-flow duct.

[0050] The diffuser duct 110 is arranged between the volute side profile 310 and the volute tongue side profile 320 and between the cross-flow duct and the air supply duct. Specifically, the outlet side of the cross-flow duct is the inlet side 111 of the diffuser duct. As shown in Figure 1 the cross-flow fan wheel 200, the outlet side of the cross-flow duct generally extends from the end of the volute tongue to the volute side profile 310. The flow direction of the outflow of the cross-flow duct is generally perpendicular to the outlet side of the cross-flow duct.

[0051] At the diffuser duct 110, the width of the air duct gradually increases, or the distance between the volute side profile 310 and the volute tongue side profile 320 gradually increases, for converting the dynamic pressure of the outflow into static pressure, converting the high-speed airflow blown out of the cross-flow duct into high-pressure low-speed airflow, and then blowing out from the air supply duct.

[0052] As shown in Figure 1 the outlet side 112 of the diffuser duct is two adjacent ones, with the diversion block 120 as the dividing point, and is respectively the inlet side of the first air supply duct 141 and the second air supply duct 142. In other embodiments of the present application, other diversion blocks 120 are also provided to form more air supply ducts, and the outlet side 112 of the diffuser duct is a plurality of ones corresponding to the air supply ducts.

[0053] The outlet side of the first air supply duct 141 can be a first air outlet, and the outlet side of the second air supply duct 142 can be a second air outlet.

[0054] In this embodiment, the flow guide grille is disposed upstream of the diverter block 120 to pre-divert and guide the outlet airflow before it contacts the diverter block 120. Specifically, the flow guide grille is provided with three or more guide plates 131 spaced apart along the width direction of the diffuser duct 110, forming a grille duct between adjacent guide plates 131. After the outlet airflow enters the flow guide grille, it will enter each grille duct, that is, be diverted by the grille duct. Each grille duct may have a different orientation, changing the airflow direction on the inlet and outlet sides of the grille duct, thereby guiding the airflow to the first supply air duct 141 and the second supply air duct 142.

[0055] In this embodiment, the air duct assembly 100, by setting a guide grille, can avoid or reduce the direct impact of the outlet airflow on the diverter block 120, thereby reducing wind loss and energy loss, and achieving the effect of increasing the air volume of the air conditioner and reducing the energy consumption of the air conditioner.

[0056] On the other hand, by setting multiple grid air ducts at intervals, the airflow in the diffuser duct 110 can be rectified, thereby reducing turbulence and turbulence in the high-speed airflow blown out from the cross-flow duct, and further avoiding or reducing the direct collision of the outlet airflow with the diverter block 120.

[0057] In some embodiments of the air duct assembly of the present invention, a first air supply duct 141 is formed between the volute side profile 310 and the diverter block 120. A second air supply duct 142 is formed between the diverter block 120 and the volute tongue side profile 320.

[0058] The air outlet of the diffuser duct 110 is guided to the grille duct of the first supply air duct 141, forming the first grille duct 151. The air outlet of the diffuser duct 110 is guided to the grille duct of the second supply air duct 142, forming the second grille duct 152. A first diversion duct 161 is formed between the guide plate 131 near the volute side profile 310 and the volute side profile 310. A second diversion duct 162 is formed between the guide plate 131 near the volute tongue side profile 320 and the volute tongue side profile 320.

[0059] The sum of the inlet widths of each of the first grille ducts 151 and the first diversion ducts 161 is greater than the sum of the inlet widths of each of the second grille ducts 152 and the second diversion ducts 162.

[0060] In this embodiment, as Figure 2 As shown, the inlet width of the first grille duct 151 is L1, the inlet width of the first diversion duct 161 is L2, the inlet width of the second grille duct 152 is L3, and the inlet width of the first diversion duct 161 is L4. Taking the example that there are two first grille ducts 151 and two grille ducts 152, we have L1 + L1 + L2 > L3 + L3 + L4.

[0061] In general, according to the air outlet characteristics of the cross-flow fan 200, in the area between the inlet side 111 of the diffuser duct and the inlet side of the guide grille, the closer to the volute side profile 310 along the width direction of the diffuser duct 110, the smaller the dynamic pressure of the air flow, and the total pressure is relatively small under the same static pressure. If the grille ducts and the shunt ducts are arranged equidistantly along the width of the diffuser duct 110 (for example, L1+L1+L2=L3+L3+L4), it will result in that the air flow entering the first air supply duct 141 is less than the air flow entering the second air supply duct 142, or the sum of the total pressure in the first air supply duct 141 is less than the sum of the total pressure in the second air supply duct 142, thereby causing the air flow blown out of the first air outlet and the second air outlet to be inconsistent.

[0062] In the embodiment, by setting the sum of the inlet side widths of each first grille duct 151 and the first shunt duct 161 to be greater than the sum of the inlet side widths of each second grille duct 152 and the second shunt duct 162, the air flow with the same sum of total pressures can be shunted and guided into the first air supply duct 141 and the second air supply duct 142, and uniform and consistent air flow can be blown out of the first air outlet and the second air outlet.

[0063] In some embodiments of the air duct assembly of the present application, as shown in Figure 2 The first air supply duct 141 is formed between the volute side profile 310 and the shunt block 120. The second air supply duct 142 is formed between the shunt block 120 and the volute tongue side profile 320.

[0064] The grille ducts that guide the air outlet of the diffuser duct 110 to the first air supply duct 141 are the first grille ducts 151. The grille ducts that guide the air outlet of the diffuser duct 110 to the second air supply duct 142 are the second grille ducts 152.

[0065] The sum of the inlet side widths of each first grille duct 151 is greater than the sum of the inlet side widths of each second grille duct 152.

[0066] In the embodiment, as shown in Figure 2 The inlet side width of the first grille duct 151 is L1, and the inlet side width of the second grille duct 152 is L3. Taking the first grille duct 151 and the second grille duct 152 as an example, L1+L1>L3+L3.

[0067] On the one hand, in general, according to the air outlet characteristics of the cross-flow fan 200, in the area between the inlet side 111 of the diffuser duct and the inlet side of the guide grille, the dynamic pressure of the air flow near the volute side profile 310 is relatively small along the width direction of the diffuser duct 110, and the total pressure is also relatively small under the same static pressure. On the other hand, specifically, the dynamic pressure of the air flow near the volute side profile 310 and the volute tongue side profile 320 is relatively small along the width direction of the diffuser duct 110. The air flow near the volute side profile 310 and the volute tongue side profile 320 enters the first shunt duct 161 and the second shunt duct 162, respectively. Therefore, when the first grille duct 151 and the second grille duct 152 are arranged, the inlet width of the first shunt duct 161 and the second shunt duct 162 can be ignored, and as long as the sum of the inlet width of each first grille duct 151 is greater than the sum of the inlet width of each second grille duct 152, the main part (the part with large dynamic pressure) of the air flow can be grasped to shunt and guide the air flow with the same total pressure into the first air supply duct 141 and the second air supply duct 142, so that the first air outlet and the second air outlet blow out uniform and consistent air flow.

[0068] In some embodiments of the air duct assembly of the present application, as shown in Figure 3 The first grille duct 151 is at least two.

[0069] The inlet width L1 of any first grille duct 151 is less than the outlet width L5. In adjacent two first grille ducts 151, the ratio of the outlet width to the inlet width L5 / L1 of the first grille duct 151 near the volute side profile 310 is less than the ratio of the outlet width L5 to the inlet width L1 of the first grille duct 151 near the volute tongue side profile 320.

[0070] Taking two first grille ducts 151 as an example, as shown in Figure 3 The volute side profile 310 is on the right side of the figure, so the L5 / L1 of the first grille duct 151 on the right side is less than the L5 / L1 of the first grille duct 151 on the left side.

[0071] In this embodiment, the first grille duct 151 has a flared structure, so that the first grille duct 151 not only has the functions of shunting and guiding, but also has the function of diffusing, which can change the overall flow direction of the air flow in the first grille duct 151 and convert the dynamic pressure into static pressure.

[0072] The degree of expansion of the first grid air duct 151 is positively correlated with the ratio of the outlet side width to the inlet side width L5 / L1. The farther the first grid air duct 151 is from the volute side profile 310, the closer it is to the distribution block 120. By setting a relatively large L5 / L1 for the first grid air duct 151 close to the distribution block 120, more dynamic pressure of the air flow in the first grid air duct 151 can be converted into static pressure, that is, the dynamic pressure of the air flow at the outlet side of the first grid air duct 151 is relatively small, thereby reducing the energy loss when the air flow meets the distribution block 120, reducing the air loss, and increasing the air volume of the first air supply duct 141.

[0073] When there are more than two first grid air ducts 151, the L5 / L1 of each first grid air duct 151 is positively correlated with the distance from the volute side profile 310.

[0074] In some embodiments of the air duct assembly of the present application, as shown in Figure 5 , there are at least two first grid air ducts 151. The inlet side width of the first grid air duct 151 is smaller than the outlet side width. Among adjacent two first grid air ducts 151, the diffusion angle a of the first grid air duct 151 close to the volute side profile 310 is smaller than the diffusion angle a of the first grid air duct 151 close to the volute tongue side profile 320.

[0075] In this embodiment, the diffusion angle a is the included angle of the connecting line of the windward end 1311 and the leeward end 1312 of each of the two guide plates 131 forming the first grid air duct 151. The larger the diffusion angle a, the greater the degree of expansion of the dynamic pressure of the air flow in the first grid air duct 151.

[0076] Taking two first grid air ducts 151 as an example, as shown in Figure 5 , the volute side profile 310 is on the right side of the figure, and the diffusion angle a of the first grid air duct 151 on the right side is smaller than the diffusion angle a of the first grid air duct 151 on the left side. In this way, the first grid air duct 151 close to the distribution block 120 has a larger expansion effect, and the air flow flowing out of the first grid air duct 151 has a relatively small dynamic pressure, thereby reducing the air loss when it meets the distribution block 120.

[0077] In some embodiments of the air duct assembly of the present application, as shown in Figure 5 , there are at least two second grid air ducts. Any second grid air duct is in the shape of an expanding pipe. Among adjacent two second grid air ducts, the diffusion angle of the second grid air duct close to the volute side profile is larger than the diffusion angle of the second grid air duct close to the volute tongue side profile.

[0078] In this embodiment, the diffusion angle β is the angle between the lines connecting the windward and leeward ends of the two guide plates 131 that form the second grille duct 152. The larger the diffusion angle β, the greater the degree of dynamic pressure diffusion of the airflow in the second grille duct 152.

[0079] Taking the second grille air duct 152 as an example, as follows: Figure 5 As shown, the volute side profile 310 is located on the right side of the figure. Therefore, the diffusion angle β of the second grille duct 152 located on the right side is greater than that of the second grille duct 152 located on the left side. With this configuration, the second grille duct 152 near the diverter block 120 has a larger diffusion effect, and the airflow flowing out of the second grille duct 152 has a relatively small dynamic pressure, thereby reducing the wind loss when it encounters the diverter block 120.

[0080] In some embodiments of the air duct assembly of the present invention, such as Figure 2 As shown, the airflow grille includes five airflow guides 131 to form two first grille ducts 151 and two second grille ducts 152.

[0081] On the one hand, the more grille ducts there are, the better the rectification effect on the outlet airflow, which can reduce turbulence in the outlet airflow. On the other hand, the more grille ducts there are, the greater the resistance to the outlet airflow, which will reduce the energy of the outlet airflow. The two first grille ducts 151 and the two second grille ducts 152 are the optimal result of considering the above factors, and are more suitable for air conditioners with a single cross-flow impeller and dual air outlets.

[0082] In some embodiments of the air duct assembly of the present invention, such as Figure 4 As shown, the volute side profile 310 includes a first arcuate segment 311 facing the volute tongue side profile 320.

[0083] Each guide vane 131 forming the first grille air duct 151 includes a second arc-shaped segment 1313 protruding toward the volute tongue side profile 320.

[0084] In this embodiment, the first arc segment 311 is used to form the flared structure of the diffuser duct 110 on the one hand, and on the other hand, it is used to further increase the distance between the ends of the volute side profile 310 and the volute tongue side profile 320, so that the first air outlet and the second air outlet form a larger gap, thereby improving the large-angle and wide-angle air outlet effect of the air conditioner.

[0085] The second arc-shaped section 1313 is used to guide the direction of the airflow in the first grille duct 151 and the first diversion duct 161, so as to promote the orderly and stable flow of the airflow into the first supply duct 141.

[0086] In some embodiments of the air duct assembly of the present invention, such as Figure 4As shown, the flow splitting block 120 is wedge-shaped, and the tip of the wedge is located on the outlet side 112 of the diffuser duct to form a flow splitting end 121.

[0087] An upstream side of the flow splitting end 121 of the flow splitting block 120 is provided with a flow guide plate 131 along the outflow direction of the diffuser duct 110.

[0088] In this embodiment, the flow guide plate 131 is provided on the upstream side of the flow splitting end 121 to split and guide the outflow in advance, so that the outflow will not directly hit the flow splitting end 121, thereby reducing the wind loss.

[0089] In some embodiments of the air duct assembly of the present application, as shown in Figure 4 The flow guide plate 131 on the upstream side of the flow splitting end 121 forms a first grating duct 151 and a second grating duct 152 on both sides thereof.

[0090] The flow guide plate 131 on the upstream side of the flow splitting end 121 includes a second arc-shaped section 1313 protruding towards the volute tongue side profile 320.

[0091] In this embodiment, the flow guide plate 131 is provided on the upstream side of the flow splitting end 121 to split and guide the outflow in advance, so that the outflow will not directly hit the flow splitting end 121, thereby reducing the wind loss.

[0092] The second arc-shaped section 1313 of the flow guide plate 131 on the upstream side of the flow splitting end 121 can guide the direction of the outflow in the first grating duct 151, so that the outflow flows orderly and stably into the first air supply duct 141. Meanwhile, the second arc-shaped section 1313 can also guide the direction of the outflow in the second grating duct 152, so that the outflow will not directly hit the flow splitting block 120, thereby reducing the wind loss.

[0093] In some embodiments of the air duct assembly of the present application, as shown in Figure 4 The distance L6 between the windward end 1311 of any flow guide plate 131 and the inlet side 111 of the diffuser duct is greater than the distance L7 between the leeward end 1312 of the flow guide plate 131 and the outlet side 112 of the diffuser duct.

[0094] The main function of the diffuser duct 110 is to expand the outflow, reduce the dynamic pressure, and increase the static pressure. In the upstream region of the diffuser duct 110, the outflow has relatively large dynamic pressure and relatively more turbulent flow. In the downstream region of the diffuser duct 110, the outflow has relatively small dynamic pressure and relatively less turbulent flow.

[0095] If the guide grille is arranged in the upstream region of the diffuser air duct 110, the air flow will hit the guide plate 131 violently, which will form a large wind loss on the one hand, and more turbulence on the other hand. On the other hand, if the guide grille is arranged in the upstream region of the diffuser air duct 110, the outlet side of the guide grille will be far away from the flow dividing block 120, and the air flow divided by the grille air duct will recombine and directly hit the flow dividing block 120, causing a large wind loss.

[0096] In the embodiment, the guide grille is in the downstream region of the diffuser air duct 110, and part of the dynamic pressure has been converted into static pressure, so that the air flow will not cause a large wind loss when it meets the guide plate 131, and it is also not easy to form turbulence. Moreover, the outlet side of the guide grille is close to the flow dividing block 120, and the air flow divided by the grille air duct will not have time to recombine, but will orderly and stably flow into the first air supply air duct 141 and the second air supply air duct 142.

[0097] On the other hand, the application also provides an air conditioner, which comprises a cross-flow fan wheel 200 and the air duct assembly 100 of any one of the above embodiments or combinations of embodiments. The air duct assembly 100 is arranged downstream of the cross-flow fan wheel 200.

[0098] Since the air duct assembly 100 is provided with a guide grille, it can avoid or reduce the air flow directly hitting the flow dividing block 120, thereby reducing the wind loss and energy loss. The air conditioner of the embodiment can have a large air supply volume and a small energy consumption.

[0099] At this point, those skilled in the art should realize that although the application has been shown and described in detail in the above embodiments, many other variants or modifications conforming to the principles of the application can be directly determined or deduced according to the disclosure of the application without departing from the spirit and scope of the application. Therefore, the scope of the application should be understood and recognized as covering all these other variants or modifications.

Claims

1. An air duct assembly for an air conditioner, comprising: Comprising: a diffuser duct downstream of a cross-flow fan wheel of the air conditioner and formed between a volute side profile and a volute tongue side profile; a flow splitter downstream of an outlet side of the diffuser duct to form a first air supply duct and a second air supply duct downstream of the diffuser duct; a flow guide grid within the diffuser duct; the flow guide grid comprising at least three flow guide plates spaced along a width direction of the diffuser duct to form at least two grid ducts; each of the grid ducts configured to direct air outflow of the diffuser duct to the first air supply duct and the second air supply duct; the first air supply duct formed between the volute side profile and the flow splitter; the second air supply duct formed between the flow splitter and the volute tongue side profile; the grid ducts directing air outflow of the diffuser duct to the first air supply duct are first grid ducts; the grid ducts directing air outflow of the diffuser duct to the second air supply duct are second grid ducts; a sum of inlet side widths of each of the first grid ducts is greater than a sum of inlet side widths of each of the second grid ducts.

2. The air duct assembly according to claim 1, wherein: the first grid ducts are at least two; an inlet side width of any one of the first grid ducts is less than an outlet side width; in adjacent two of the first grid ducts, a ratio of the outlet side width to the inlet side width of the first grid duct closer to the volute side profile is less than a ratio of the outlet side width to the inlet side width of the first grid duct closer to the volute tongue side profile.

3. The air duct assembly according to claim 1, wherein: the first grid ducts are at least two; any one of the first grid ducts is flared; in adjacent two of the first grid ducts, a divergence angle of the first grid duct closer to the volute side profile is less than a divergence angle of the first grid duct closer to the volute tongue side profile.

4. The air duct assembly according to claim 1, wherein: the flow guide grid comprises five flow guide plates to form two first grid ducts and two second grid ducts.

5. The air duct assembly according to claim 1, wherein: the volute side profile comprises a first arc segment towards the volute tongue side profile; each of the flow guide plates forming the first grid ducts comprises a second arc segment protruding towards the volute tongue side profile.

6. The air duct assembly of claim 1, wherein, the flow splitter is wedge-shaped, and a tip of the wedge-shaped is at an outlet side of the diffuser duct to form a flow splitting end; upstream of the flow splitting end of the flow splitter along an air outflow direction of the diffuser duct, one of the flow guide plates is spaced.

7. The air duct assembly of claim 6, wherein, sides of the flow guide plate upstream of the flow splitting end form the first grid duct and the second grid duct, respectively; the flow guide plate upstream of the flow splitting end comprises a second arc segment protruding towards the volute tongue side profile.

8. The air duct assembly according to claim 1, wherein: the second grid ducts are at least two; Any of the second grid air ducts is in the shape of a flared pipe; among two adjacent second grid air ducts, the diffusion angle of the second grid air duct close to the volute side profile is greater than the diffusion angle of the second grid air duct close to the volute tongue side profile.

9. The air duct assembly according to claim 1, wherein, The first split air duct is formed between the guide vane close to the volute side profile and the volute side profile, and the second split air duct is formed between the guide vane close to the volute tongue side profile and the volute tongue side profile; the sum of the inlet side widths of each of the first grid air ducts and the first split air ducts is greater than the sum of the inlet side widths of each of the second grid air ducts and the second split air ducts.

10. The air duct assembly according to claim 1, wherein, The distance between the windward end of any of the guide vanes and the inlet side of the diffuser air duct is greater than the distance between the leeward end of the guide vane and the outlet side of the diffuser air duct.

11. An air conditioner characterized by comprising: The air duct assembly according to any of claims 1-10 is arranged downstream of the cross-flow fan.

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