Air duct assembly and air conditioning device

Abstract

The invention discloses an air duct assembly and an air conditioning device. The air conditioning device comprises the air duct assembly, a fan and a heat exchanger. The air duct assembly comprises a first shell and a second shell, the first shell and the second shell are matched to define a diffusion cavity, a heat exchange cavity and an air outlet, the diffusion cavity and the heat exchange cavity communicate with each other, the air outlet communicates with the heat exchange cavity, the diffusion cavity is configured to communicate with the air outlet side of a fan, and the heat exchange cavity is configured to contain a heat exchanger; the second shell comprises a diffusion cavity lower shell and a water pan which are connected with each other, the diffusion cavity lower shell defines a cavity bottom wall of the diffusion cavity, and the water pan defines a cavity bottom wall of the heat exchange cavity; the diffusion cavity lower shell and the water pan are integrally formed components. According to the technical scheme, the production and assembly efficiency can be effectively improved, the airflow energy loss is reduced, noise is lowered, and the product quality is improved.

Description

Technical Field

[0001] This application relates to the technical field of air conditioning, and particularly to an air duct assembly and an air conditioning device using the air duct assembly. Background Art

[0002] An existing indoor air conditioning device includes a housing structure, a fan, and a heat exchanger. An air duct structure is formed inside the housing structure. The heat exchanger is disposed in the air duct, and a water receiving tray is further disposed below the heat exchanger. Among them, the fan drives air flow to flow through the heat exchange device through the air duct and then discharges it outward. The water receiving tray is used to receive the condensed water generated during the operation of the heat exchanger.

[0003] Generally, on the air duct path from the fan to the heat exchanger, the housing structure is formed by splicing multiple plate members to form an air duct. Connecting these plate members to the water receiving tray enables the air in the air duct to smoothly blow towards the heat exchanger carried by the water receiving tray. However, if there are improper installations, aging or damage of the sealing rings between the housing structure and the water receiving tray, gaps may occur, resulting in gas leakage, certain loss of the energy of the air flow, possible generation of noise or abnormal sounds, increased subsequent maintenance costs, and complex installation processes and low production efficiency. Summary of the Invention

[0004] Embodiments of this application provide an air duct assembly and an air conditioning device, which can reduce the energy loss of the air flow in the air conditioning device.

[0005] In a first aspect, embodiments of this application provide an air duct assembly. The air duct assembly is applied to an air conditioning device, and the air conditioning device includes a fan and a heat exchanger. The air duct assembly includes a first housing and a second housing. The first housing and the second housing cooperate to define a connected diffuser chamber, a heat exchange chamber, and an air outlet communicating with the heat exchange chamber. The diffuser chamber is configured to communicate with the air outlet side of the fan, and the heat exchange chamber is configured to accommodate the heat exchanger;

[0006] The second housing includes a diffuser chamber lower housing and a water receiving tray connected to each other. The diffuser chamber lower housing defines the bottom wall of the diffuser chamber, and the water receiving tray defines the bottom wall of the heat exchange chamber;

[0007] Among them, the diffuser chamber lower housing and the water receiving tray are integrally formed components.

[0008] Based on the air duct assembly of the embodiments of the present application, the diffuser chamber formed by the first housing and the second housing communicates with the air outlet side of the fan. In this way, the air flow blown out by the fan can, through the diffusing action of the diffuser chamber, convert part of its kinetic energy into static pressure, reduce the wind speed, and then efficiently exchange heat with the heat exchanger in the heat exchange chamber. The present application further designs the diffuser chamber lower housing forming the bottom wall of the diffuser chamber and the bottom wall forming the heat exchange chamber to be integrally formed. In this way, in the air duct structure from the diffuser chamber to the heat exchange chamber, the situation of splicing the housings to form the air duct is reduced. Thus, the gap at the connection between the diffuser chamber and the heat exchange chamber is reduced, and the integrity of the chamber walls of the two is higher. In this way, during the air flow process, the leakage amount is greatly reduced, that is, the static pressure loss is small, which can increase the air supply volume and improve the heat exchange efficiency. And compared with the existing solution of splicing multiple plate parts to obtain the air duct housing structure and then splicing and fixing the divided air duct housing structure with the water receiving tray, since the diffuser chamber lower housing forming the bottom wall of the diffuser chamber in the present application is integrally formed with the water receiving tray, the number of parts is reduced, and the production and assembly efficiency can be improved.

[0009] In a possible implementation manner, the diffuser chamber lower housing and the water receiving tray are smoothly transitioned at the connection from the diffuser chamber to the heat exchange chamber.

[0010] In this implementation manner, the smooth transition at the connection between the diffuser chamber lower housing and the water receiving tray can ensure a uniform flow field in the air duct, avoid the generation of turbulence in the air duct, and thus reduce noise.

[0011] In a possible implementation manner, the diffuser chamber lower housing slopes upward in the direction away from the water receiving tray, and the first housing and the side of the diffuser chamber lower housing away from the water receiving tray further define a fan chamber communicating with the diffuser chamber, and the fan chamber is configured to accommodate a fan;

[0012] The first housing and the second housing cooperate to define an air return opening communicating with the fan chamber, and at least part of the air return opening faces downward.

[0013] In this implementation manner, the diffuser chamber lower housing can achieve a diffusing effect on the air flow, so that the air flow will be smoother and more uniform when entering the heat exchanger, reducing noise. In addition, an air return opening is defined between the first housing and the water receiving tray, which can increase the area of the air return opening, improve the air return efficiency, and thus improve the heat exchange efficiency.

[0014] In a possible implementation manner, the second housing further includes a fan chamber front housing connected to the side of the diffuser chamber lower housing away from the water receiving tray, the first housing includes a fan chamber rear housing, and the fan chamber front housing and the fan chamber rear housing define the fan chamber and the air return opening;

[0015] The first downstream end of the fan chamber front housing and the second downstream end of the fan chamber rear housing are flush with each other in the horizontal direction, and the air return opening is arranged below the fan; or

[0016] The first downstream end of the front housing of the fan chamber and the second downstream end of the rear housing of the fan chamber are not flush in the horizontal direction, so that at least part of the air return opening is located in front of or behind the fan.

[0017] In a possible implementation, it further includes a volute tongue, and the volute tongue is fixed at the junction between the front housing of the fan chamber and the lower housing of the diffuser chamber.

[0018] In a possible implementation, the lower housing of the diffuser chamber includes a diffusing portion and a mounting portion. One side of the diffusing portion is connected to the water receiving tray, and the mounting portion is connected to the side of the diffusing portion away from the water receiving tray;

[0019] The air duct assembly further includes a volute tongue, and the volute tongue is fixed on the mounting portion.

[0020] In this implementation, the diffusing portion and the mounting portion are integrally formed on the lower housing of the diffuser chamber. The volute tongue can be installed without additional peripheral components, the installation operation is convenient, the number of components is reduced, and the production efficiency and assembly efficiency are improved.

[0021] In a possible implementation, the orientation of the air outlet is the horizontal direction.

[0022] In this implementation, the heat exchange effect of horizontal air outlet is good, which improves the comfort of user use.

[0023] In a possible implementation, the water receiving tray includes a water receiving portion and a drainage portion connected to each other. The water receiving portion is configured to carry the heat exchanger and is connected to the lower housing of the diffuser chamber. An upwardly open water receiving groove is formed in the water receiving portion, and the drainage portion is arranged on one side of the water receiving portion and communicates with the water receiving groove;

[0024] Wherein, the bottom wall of the water receiving groove slopes downward in the direction towards the drainage portion.

[0025] In this implementation, the water receiving groove is upwardly open, so that it is convenient for the water receiving tray to collect the condensed water generated during the operation of the heat exchanger. The downward slope of the bottom wall of the water receiving groove in the direction towards the drainage portion can improve the water collection and diversion effect of the water receiving tray, and the drainage portion discharges the collected condensed water, with a simple and compact structure.

[0026] In a possible implementation, the second housing further includes a pipe routing portion, and the pipe routing portion connects the drainage portion and the side portion of the lower housing of the diffuser chamber. A through hole for the refrigerant pipe of the heat exchanger to pass through is provided on the pipe routing portion;

[0027] Wherein, the pipe routing portion, the lower housing of the diffuser chamber and the drainage portion are of an integral structure.

[0028] In a possible implementation, a lapping boss protrudes from the bottom wall of the water receiving groove. The lapping boss is configured to carry the heat exchanger and cooperate with the heat exchanger to divide the heat exchange chamber into a pre-heat exchange chamber and a post-heat exchange chamber. The pre-heat exchange chamber communicates with the diffuser chamber; the post-heat exchange chamber communicates with the air outlet;

[0029] Among them, the opening size of the post-heat exchange cavity is set to decrease in the direction from the overlapping boss to the air outlet.

[0030] In this implementation manner, the overlapping boss bears the heat exchanger, which can avoid the situation that when there is a large amount of condensate water accumulation, the heat exchanger is immersed in the accumulated water and causes the heat exchanger to rust. The setting that the opening size of the post-heat exchange cavity decreases in the direction from the overlapping boss to the air outlet can increase the air outlet speed, and at the same time, can also prevent the air outlet from carrying condensate water.

[0031] In a possible implementation manner, the bottom wall of the post-heat exchange cavity is arranged in an arc shape, and the bottom wall of the post-heat exchange cavity extends upward in the direction from the overlapping boss to the air outlet.

[0032] In this implementation manner, the arc-shaped structure can reduce the wind resistance and guide the air flow, thereby increasing the air outlet speed, reducing noise and abnormal noise.

[0033] Based on the above embodiments, in the embodiments of the present application, by integrally forming the diffuser cavity lower shell and the water receiving tray to form the second shell, and then assembling the second shell with the first shell, the air duct assembly can be obtained. This can not only improve the production efficiency and assembly efficiency of the air duct assembly, but also reduce the gap at the connection between the diffuser cavity and the heat exchange cavity, making the cavity walls of the two more integrated, reducing the air flow resistance and pressure loss. In this way, the generation of noise and abnormal noise can be reduced, and the heat exchange efficiency can also be improved.

[0034] In a second aspect, the embodiments of the present application provide an air conditioning device, including a fan, a heat exchanger, and the above-mentioned air duct assembly. The air outlet side of the fan is communicated with the diffuser cavity, and the heat exchanger is arranged in the heat exchange cavity.

[0035] In this implementation manner, by adopting the above-mentioned air duct assembly in the present application, the number of components can be reduced, the production efficiency can be improved, and the installation process is simple.

[0036] In a possible implementation manner, the heat exchanger is arranged in an arc shape, and the number of refrigerant pipes in the middle of the heat exchanger is more than the number of refrigerant pipes on both sides of the heat exchanger;

[0037] Among them, the central axis of the diffuser cavity passes through the middle of the heat exchanger.

[0038] In this implementation manner, in the structure of the present application, the central axis of the diffuser cavity passes through the middle of the heat exchanger, so that most of the air flow in the diffuser cavity passes through the middle of the heat exchanger. Since the number of refrigerant pipes in the middle of the heat exchanger is more, the heat exchange efficiency of the present application can be effectively improved.

[0039] In a possible implementation manner, it further includes an electric control box assembly, and the electric control box assembly is arranged on the lower side of the diffuser cavity lower shell;

[0040] Among them, at least part of the air return opening is arranged on the front side of the blower and is spaced apart from the electronic control box assembly.

[0041] In a possible implementation, it further includes a duct interface, which is connected to the first housing and / or the second housing and is located between the side of the water receiving tray close to the diffuser chamber lower housing and the side of the first housing away from the water receiving tray;

[0042] Among them, the duct interface is arranged around the lower part of the air return opening and the electronic control box assembly.

[0043] In a possible implementation, the blower is a cross-flow impeller.

[0044] In this application, the air conditioning device adopts the above-mentioned air duct assembly, making the structure of the product more compact. Moreover, due to the high integrity of the bottom wall of the diffuser chamber and the bottom wall of the heat exchange chamber, the connectivity of the air duct is more harmonious, avoiding the generation of noise and abnormal sounds caused by air flow pressure relief. At the same time, it can effectively improve the air outlet speed, with higher heat exchange efficiency, and can also reduce the number of components, making production, transportation, installation and maintenance more convenient. Description of the Drawings

[0045] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the structures shown in these drawings.

[0046] Figure 1 Structural schematic diagram of an air conditioning device provided by an embodiment of the present application;

[0047] Figure 2 Structural schematic diagram of an air conditioning device provided by an embodiment of the present application from another angle;

[0048] Figure 3 First exploded view of an air conditioning device provided by an embodiment of the present application;

[0049] Figure 4 Second exploded view of an air conditioning device provided by an embodiment of the present application;

[0050] Figure 5 Front view of an air conditioning device provided by an embodiment of the present application;

[0051] Figure 6 For Figure 5 Cross-sectional view at A-A in

[0052] Figure 7 is Figure 5 the sectional view at B-B in

[0053] Figure 8 the structural schematic diagram of a second housing provided by an embodiment of the present application;

[0054] Figure 9 the structural schematic diagram of a second housing provided by an embodiment of the present application from another angle;

[0055] Figure 10 the front view of a second housing provided by an embodiment of the present application;

[0056] Figure 11 is Figure 10 the sectional view at C-C in

[0057] Explanation of the reference numerals in the drawings:

[0058] 1. Indoor unit; 10. Air duct assembly; 11. Fan chamber; 12. Diffuser chamber; 13. Heat exchange chamber; 131. Pre-heat exchange chamber; 132. Post-heat exchange chamber; 14. Return air inlet; 15. Air outlet; 20. First housing; 21a. Rear housing of the fan chamber; 21a1. Second downstream end; 21b. Upper housing of the fan chamber; 22. Upper housing of the diffuser chamber; 23. Upper housing of the heat exchange chamber; 30. Second housing; 31. Front housing of the fan chamber; 31a. First downstream end; 32. Grille; 33. Thermal insulation material part; 34. Lower housing of the heat exchange chamber; 35. Pipe routing part; 351. First connecting plate; 352. Second connecting plate; 353. Through hole; 40. Scroll tongue; 50. Lower housing of the diffuser chamber; 51. Diffuser part; 52. Mounting part; 521. Flow guiding surface; 53. Return port; 60. Water receiving tray; 61. Water receiving part; 611. Water receiving groove; 612. Lapping boss; 62. Drainage part; 621. Water storage groove; 622. Drain pipe; 623. Water pump mounting block; 70. Side wall panel; 71. Fixing part; 72. Guiding part; 721. Air guiding surface; 91. Fan; 92. Heat exchanger; 93. Electric control box assembly; 100. Air duct interface.

[0059] The realization of the purpose, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. Detailed Embodiments

[0060] To make the purpose, technical solutions and advantages of the present application clearer, the following will further describe in detail the embodiments of the present application with reference to the accompanying drawings.

[0061] When the following description refers to the accompanying drawings, unless otherwise indicated, the same numerals in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods that are consistent with some aspects of the present application as detailed in the appended claims.

[0062] In the description of the present application, it should be understood that the terms "first", "second", etc. are used only for descriptive purposes and cannot be construed as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances. In addition, in the description of the present application, unless otherwise specified, "a plurality" means two or more. "And / or" describes the association relationship of associated objects and indicates that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally represents an "or" relationship between the associated objects before and after.

[0063] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs. The terms used in the description of this specification are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0064] Please refer to Figures 1 to 3 , an embodiment of the present application provides an air duct assembly 10 and an air conditioning device. It can be understood that the air conditioning device includes an indoor unit 1 and an outdoor unit. In Figures 1 to 3 , the part of the indoor unit 1 is shown. The indoor unit 1 includes an air duct assembly 10, a fan 91, a heat exchanger 92, and an electronic control box assembly 93. The fan 91 and the heat exchanger 92 are controlled by the electronic control box assembly 93.

[0065] Refer to Figure 4 and Figure 5 , wherein, the air duct assembly 10 forms an air duct and has an air return opening 14 and an air outlet 15. In some embodiments, between the air return opening 14 and the air outlet 15 of the air duct, there are provided a connected fan cavity 11, a diffuser cavity 12, and a heat exchange cavity 13. The air return opening 14, the fan cavity 11, the diffuser cavity 12, the heat exchange cavity 13, and the air outlet 15 are arranged in sequence to form at least part of the air flow path.

[0066] The blower chamber 11 houses a blower 91. The blower 91 drives the outside air flow to enter the blower chamber 11 from the air return opening 14, and drives the air flow to flow from the blower chamber 11 into the diffuser chamber 12. After the air flow is diffused in the diffuser chamber 12, it enters the heat exchange chamber 13. A heat exchanger 92 is arranged in the heat exchange chamber 13. After the air flow passes through the heat exchanger 92, properties such as temperature or humidity are adjusted, and then it flows out of the indoor unit 1 of the air conditioning device through the air outlet 15 and flows to the indoor environment, so as to achieve the purpose of adjusting the space air. During the operation of the indoor unit 1, the outdoor unit compresses the refrigerant through a compressor, and transports the refrigerant to the heat exchanger 92 of the indoor unit 1 through a circulation flow path. The blower 91 drives the air flow to enter the air duct from the air return opening 14, and sequentially flows through the diffuser chamber 12 and the heat exchange chamber 13, and exchanges heat with the heat exchanger 92. After the refrigerant exchanges heat with the air in the heat exchange chamber 13, it flows out of the indoor unit 1 and returns to the compressor of the outdoor unit, and is compressed by the compressor again to a predetermined temperature and pressure, so as to carry out a new round of refrigerant cycle again.

[0067] As Figures 4 to 6 shown, the air duct assembly 10 of the present application includes a first housing 20 and a second housing 30. After the first housing 20 and the second housing 30 are assembled, a blower chamber 11, a diffuser chamber 12 and a heat exchange chamber 13 that are sequentially communicated are formed inside. The blower 91 is arranged in the blower chamber 11, and the heat exchanger 92 is arranged in the heat exchange chamber 13. The blower 91 can be a cross-flow impeller, a centrifugal impeller or an axial-flow impeller, etc. In Figure 2 the exemplary embodiment shown, the blower 91 is a cross-flow impeller. When the blower 91 is configured as a cross-flow impeller, the cross-flow impeller has the advantages of large air volume, low noise and simple installation. And in the present application, the blower chamber 11 is formed, and the blower 91 in the form of a cross-flow impeller is installed in the blower chamber 11. Compared with the conventional technology using a centrifugal impeller, there is no need to consider the installation structure of the centrifugal housing outside the centrifugal impeller, which reduces the assembly difficulty and improves the production efficiency.

[0068] As Figures 5 to 6 shown, in some embodiments, the heat exchanger 92 is arranged in an arc shape, and the number of refrigerant pipes in the middle of the heat exchanger 92 is more than the number of refrigerant pipes on both sides of the heat exchanger 92; among them, please refer to Figure 6 , the central axis of the diffuser chamber 12 (i.e., the dotted line in the figure) passes through the middle of the heat exchanger 92. With such an arrangement, it can make the air flow transmitted by the diffuser chamber 12 pass through the middle of the heat exchanger 92 more. Since the number of refrigerant pipes in the middle of the heat exchanger 92 is more than the number of refrigerant pipes on both sides of the heat exchanger 92, the heat exchange efficiency of the embodiment of the present application can be effectively improved. Moreover, the arc-shaped heat exchanger 92 can not only increase the heat exchange area, making the heat exchange efficiency higher. In other embodiments, the heat exchanger 92 can also adopt other structures, such as: a single-fold plate-like structure, a V-shaped structure, a wavy structure, etc.

[0069] AsFigures 5 to 6 As shown, in some embodiments, the cross-sectional area of the channel of the diffuser chamber 12 gradually increases in the direction from the upstream to the downstream of the air duct, and the outlet end of the diffuser chamber 12 terminates at the inlet end of the heat exchange chamber 13, that is, the cross-sectional area of the channel of the diffuser chamber 12 reaches the maximum at its connection with the heat exchange chamber 13. During operation, driven by the blower 91, the air flow discharged from the air outlet side of the blower 91 flows through the diffuser chamber 12 and the heat exchange chamber 13 in sequence and is then discharged to the room through the air outlet 15. When the air flow passes through the diffuser chamber 12, part of its kinetic energy is converted into static pressure and the flow velocity is reduced, so that it can fully exchange heat with the heat exchanger 92.

[0070] As Figure 5 , Figure 8 and Figure 9 As shown, the second housing 30 includes a connected diffuser chamber lower housing 50 and a water receiving tray 60. The diffuser chamber lower housing 50 defines the bottom wall of the diffuser chamber 12, and the water receiving tray 60 defines the bottom wall of the heat exchange chamber 13. Among them, the diffuser chamber lower housing 50 and the water receiving tray 60 are integrally formed members. In the embodiments of the present application, by setting the diffuser chamber lower housing 50 and the water receiving tray 60 as integrally formed members, compared with the air duct forming scheme of the indoor unit 1 of the related air conditioning device, in which multiple plates are used to respectively splice the heat exchange chamber 13 and the diffuser chamber 12 and then the heat exchange chamber 13 and the diffuser chamber 12 are docked, the number of components of the second housing 30 is reduced to a certain extent, the production efficiency and installation efficiency of the second housing 30 can be improved, and the cost can be reduced. And when the diffuser chamber lower housing 50 and the water receiving tray 60 are set as integrally formed members, the diffuser chamber lower housing 50 and the water receiving tray 60 are smoothly transitioned at the connection from the diffuser chamber 12 to the heat exchange chamber 13. This structure of smooth transition at the connection between the two can ensure the uniformity of the flow field in the air duct, avoid the generation of turbulence in the air duct, and further reduce the noise. In some embodiments, the second housing 30 can be formed by injection molding or hot pressing. For example, the second housing 30 is integrally formed by plastic injection molding. The manufacturing process is simple, suitable for commercial production, and can effectively reduce the cost. Moreover, the plastic material is light in weight, which can reduce the product weight and facilitate transportation and installation.

[0071] It should be noted that in the prior art, the chamber structure forming the diffuser chamber 12 and the water receiving tray 60 are usually separately provided and then spliced to form the air duct. This results in a relatively large number of plate components and a complex connection method, with many connection points between the diffuser structure and the water receiving tray 60, making it easy to generate gaps. Therefore, the sealing requirements for installation operations are quite high. In this application, the diffuser chamber lower shell 50 forming the bottom wall of the diffuser chamber 12 and the water receiving tray 60 forming the bottom wall of the heat exchange chamber 13 are designed to be integrally formed. In this way, in the air duct structure between the diffuser chamber 12 and the heat exchange chamber 13, the situation of splicing multiple shell plates is greatly reduced, thereby reducing the occurrence of gaps at the connection points, and the installation operation is simpler. Therefore, the bottom wall of the diffuser chamber 12 and the bottom wall of the heat exchange chamber 13 have higher integrity, the leakage amount during the airflow movement is greatly reduced, the static pressure loss is also reduced, and the airflow is transmitted more smoothly, thereby improving the air supply volume and heat exchange efficiency and reducing the generation of noise.

[0072] In summary, the above embodiments of the present invention achieve the following technical effects: First, the design of integrally forming the diffuser chamber lower shell 50 and the water receiving tray 60 not only reduces the number of components but also lowers the complexity during the assembly process. This integrally formed structure can improve the overall stability and durability. Second, using the integrally formed bottom wall of the diffuser chamber 12 and the bottom wall of the heat exchange chamber 13 can also provide a more uniform airflow distribution. Compared with the shell structure formed by splicing multiple plate components, the integrally formed design can eliminate the unevenness at the splicing points, ensure that the airflow flows more smoothly in the air duct, and reduce energy loss and pressure loss. In addition, the integrally formed bottom wall of the diffuser chamber 12 and the bottom wall of the heat exchange chamber 13 can also improve the sealing performance of the entire air duct assembly 10. Since the bottom wall of the chamber is manufactured by one-time forming without splicing points, the possibility of airflow leakage can be effectively reduced. This optimized sealing performance can not only improve the working efficiency of the system but also help prevent irrelevant gases or foreign objects from entering the air duct and protect the safe and stable operation of the heat exchange chamber 13. Generally speaking, the embodiments of this application are based on the design concept of integral forming, and through the optimization of the connection structure between the diffuser chamber 12 and the heat exchange chamber 13, not only simplifies the manufacturing and assembly processes but also improves the stability, durability, and overall working efficiency of the system.

[0073] The return air inlet 14 can be arranged directly below the blower chamber 11 and face the blower chamber 11, that is, the return air inlet 14 is arranged facing downwards. After the air flow enters the return air inlet 14, it can flow towards the blower chamber 11 through a shorter path, improving the return air rate. And with this setting, the thickness of the indoor unit is smaller, making it easier to install in an environment with a lower floor height. In some embodiments, the return air inlet 14 can also partially face forward or partially face backward, so as to meet different installation environments.

[0074] As Figures 3 to 6As shown, in some embodiments, the first housing 20 includes a main housing and a side panel 70. The main housing and the side panel 70 form a housing structure with an open bottom. The main housing includes a blower chamber rear housing 21a, a blower chamber upper housing 21b, a diffuser chamber upper housing 22, and a heat exchange chamber upper housing 23 that are connected in sequence. The diffuser chamber upper housing 22 defines the top wall of the diffuser chamber 12, and the heat exchange chamber upper housing 23 defines the top wall of the heat exchange chamber 13. The main housing, the side panel 70, and the second housing 30 together enclose to form an air duct. When assembling the first housing 20 and the second housing 30, the side panel 70 is located between the main housing and the second housing 30, and is located on both sides of the blower chamber 11 and the diffuser chamber 12 along the air flow direction. Please refer to Figure 7 , in some embodiments, the side panel 70 includes a connected fixing portion 71 and a guiding portion 72. The fixing portion 71 is located on both sides of the blower chamber 11 and is used for installing and fixing the blower 91. The guiding portion 72 is located on both sides of the diffuser chamber 12. Among them, the guiding portion 72 is provided with a wind guiding surface 721 on the side facing the diffuser chamber 12. The wind guiding surface 721 extends inwards in the direction from the diffuser chamber 12 to the heat exchange chamber 13. The wind guiding surface 721 mainly guides the air flow in the diffuser chamber 12, so that most of the air flow can pass through the middle of the heat exchanger 92, thereby improving the heat exchange efficiency of the embodiments of the present application.

[0075] The second housing 30 further includes a blower chamber front housing 31, and a volute tongue 40 located at the junction of the blower chamber front housing 31 and the diffuser chamber lower housing 50. The blower chamber rear housing 21a of the first housing 20 and the blower chamber front housing 31 of the second housing 30 are arranged opposite to each other in the front-rear direction. The blower chamber upper housing 21b of the first housing 20 bends forward from the blower chamber rear housing 21a and extends in an arc shape to the upstream end of the diffuser chamber upper housing 22. The blower chamber upper housing 21b of the first housing 20 and the volute tongue 40 are located on opposite sides at the turning of the air duct. The heat exchange chamber upper housing 23 and the water receiving tray 60 are arranged opposite to each other in the up-down direction. The air outlet 15 is defined between the heat exchange chamber upper housing 23 and the water receiving tray 60.

[0076] Furthermore, in order to be able to insulate the air flow in the heat exchanger 92, a heat insulating material member 33 is provided on the inner wall of the heat exchange chamber upper housing 23, and a heat insulating material member 33 is provided on the back side of the water receiving tray 60. Further, a heat exchange chamber lower housing 34 is provided on the back side of the heat insulating material member 33. The heat exchange chamber lower housing 34 can be made of metal material or plastic material, etc. The heat exchange chamber lower housing 34 can play a role in protecting the heat insulating material member 33. Specifically, during installation, first place the heat insulating material member 33 at the bottom of the water receiving tray 60, and then use threaded components such as screws or bolts to relatively fix the heat exchange chamber lower housing 34 and the water receiving tray 60, so that the heat insulating material member 33 and the heat exchange chamber lower housing 34 can be installed at the bottom of the water receiving tray 60 at the same time, and the installation operation is simple.

[0077] In some embodiments, the first downstream end 31a of the front housing 31 of the fan chamber is not flush with the second downstream end 21a1 of the rear housing 21a of the fan chamber, so that the air return opening 14 is at least partially located in front of or behind the fan 91. Specifically, as Figures 5 to 6 shown, the first downstream end 31a of the front housing 31 of the fan chamber is higher than the second downstream end 21a1 of the rear housing 21a of the fan chamber, and the air return opening 14 is at least partially located in front of the fan 91. Further, the air return opening 14 can be entirely located in front of the fan 91; alternatively, the air return opening 14 can extend from the lower side of the fan 91 to the front side of the fan 91; or, the first downstream end 31a of the front housing 31 of the fan chamber is lower than the second downstream end 21a1 of the rear housing 21a of the fan chamber, and at least part of the air return opening 14 is located behind the fan 91. Further, the air return opening 14 can be entirely located behind the fan 91, or the air return opening 14 can extend from the lower side of the fan 91 to the rear side of the fan 91. In some other embodiments, the first downstream end 31a of the front housing 31 of the fan chamber is flush with the second downstream end 21a1 of the rear housing 21a of the fan chamber, and the air return opening 14 is provided on the lower side of the fan 91.

[0078] In order to achieve good protection for the fan 91, in some embodiments, the present application can also be provided with a grille 32, and the grille 32 covers at least one side of the fan 91 facing the air return opening 14 to achieve protection for the fan 91. Specifically, please refer again to Figure 5 . When the air return opening 14 extends from the lower side of the fan 91 to the front side of the fan 91, one side of the grille 32 can be connected to the rear housing 21a of the fan chamber, and the other side can be connected to the front housing 31 of the fan chamber, where the other side of the grille 32 is higher than one side of the grille 32. In some other embodiments (not shown), when the air return opening 14 extends from the lower side of the fan 91 to the rear side of the fan 91, one side of the grille 32 can be connected to the rear housing 21a of the fan chamber, and the other side can be connected to the front housing 31 of the fan chamber, where the other side of the grille 32 is lower than one side of the grille 32. Of course, in some other embodiments (not shown), when the air return opening 14 is only provided on the front side or the rear side of the fan 91, the grille 32 is provided on the front side or the rear side of the fan 91, and the lower side of the fan 91 is closed by components such as a plate body. In some other embodiments (not shown), the first downstream end 31a of the front housing 31 of the fan chamber is flush with the second downstream end 21a1 of the rear housing 21a of the fan chamber, the air return opening 14 is provided on the lower side of the fan 91, and the grille 32 is horizontally connected to the first downstream end 31a of the front housing 31 of the fan chamber and the second downstream end 21a1 of the rear housing 21a of the fan chamber.

[0079] As Figures 5 to 6As shown, in some embodiments, the orientation of the air outlet 15 is in the horizontal direction. Since the air outlet in the horizontal direction can make the air flow evenly distributed in the heat exchanger 92, thus achieving a better heat exchange effect. In addition, the air outlet in the horizontal direction can also make the air flow more stable, reducing unnecessary air flow disturbance and noise, and improving the working efficiency and comfort of the system. Optionally, in some embodiments, the direction of the air outlet 15 is downward. For example, in some installation environments, the requirement of side air outlet cannot be met, and in this case, a downward air outlet scheme needs to be adopted. By using a variety of different installation accessories and interfaces, the direction of the air outlet 15 can be flexibly adjusted to meet the actual needs of different users or different scenarios. This flexibility can not only meet the personalized needs of users, but also expand the application scope of the embodiments of the present application, improving the applicability, stability and reliability of the entire system.

[0080] As Figures 8 to 9 shown, in some embodiments, the diffuser chamber lower shell 50 is inclined upward in the direction away from the water receiving tray 60. With such a setting, the flow state and speed of the air flow can be changed, so that the gas can generate a state of pressure reduction, expansion and dispersion during the flow process, thereby enabling the air flow to achieve better distribution and uniformity, and further making the air flow more stable and gentle when entering the heat exchanger 92, reducing noise.

[0081] In addition, as Figure 5 and Figure 6 shown, since the diffuser chamber lower shell 50 is inclined upward in the direction away from the water receiving tray 60, there will be a space at the bottom of the diffuser chamber lower shell 50 at this time. In the embodiments of the present application, the electronic control box assembly 93 is arranged at the bottom of the diffuser chamber lower shell 50. During installation, the electronic control box assembly 93 can be fixed to the bottom of the diffuser chamber lower shell 50 by using screws or bolts, or the electronic control box assembly 93 can be fixed to the bottom of the diffuser chamber lower shell 50 by using a snap-fitting method. With such a setting, the internal space of the indoor unit is effectively utilized, making the overall volume of the product smaller. Moreover, when the electronic control box assembly 93 needs to be repaired, it can be directly repaired at the bottom of the indoor unit without disassembling the entire indoor unit, which is more convenient and time-saving.

[0082] Meanwhile, please refer to Figure 5 and Figure 6 shown again. When at least part of the air return port 14 is arranged on the front side of the blower 91, the air return port 14 on the front side is opposite to the electronic control box assembly 93 front and back, so that the external air flow enters the air return port 14 on the front side through the surface of the electronic control box assembly 93, which is beneficial to the air-cooled heat dissipation of the electronic control box assembly 93.

[0083] In some embodiments, the indoor unit 1 is a duct unit. The embodiment of the present application also includes a duct interface 100, which is connected to the first shell 20 and / or the second shell 30, and the duct interface 100 is used to connect the air inlet duct of the duct unit. Figure 6 As shown in the figure, the duct interface 100 is connected to the fan cavity rear shell 21a and the side of the water receiving tray 60 facing the electric control box assembly 93. In this way, the duct interface 100 can be located between the side of the water receiving tray 60 close to the diffuser cavity lower shell 50 and the side of the first shell 20 away from the water receiving tray 60. The duct interface 100 is arranged around the return air port 14 and below the electric control box assembly 93. When the fan 91 is working, the external airflow enters the space between the second shell 30 and the fan cavity rear shell 21a from the air inlet duct through the duct interface 100, and the return air port 14 and the electric control box assembly 93 are arranged in the space. Part of the external airflow enters the return air port 14 after passing through the duct interface 100, and part of the external airflow enters the return air port 14 after passing through the duct interface 100, and then passes through the surface of the electric control box assembly 93 to enter the return air port 14.

[0084] like Figures 8 to 10 As shown, in some embodiments, the air duct assembly 10 of the embodiment of the present application further includes a volute tongue 40, which is fixed at the transition between the front shell 31 of the fan chamber and the lower shell 50 of the diffuser chamber. The lower shell 50 of the diffuser chamber includes a diffuser portion 51 and a mounting portion 52, one side of the diffuser portion 51 is connected to the water receiving tray 60, and the mounting portion 52 is connected to the side of the diffuser portion 51 away from the water receiving tray 60, and is located at the transition between the diffuser portion 51 and the front shell 31 of the fan chamber. The volute tongue 40 is fixed on the mounting portion 52. The lower shell 50 of the diffuser chamber of the embodiment of the present application can be easily installed with the volute tongue 40 through the mounting portion 52. In some embodiments, the mounting portion 52 is provided with a plurality of snap-fit ​​connectors, and the volute tongue 40 and the mounting portion 52 can be fixed by snap-fit. This installation method is simple and can improve production efficiency. As an optional embodiment, the mounting portion 52 can be provided with a plurality of threaded holes, and the volute tongue 40 can be fixed to the mounting portion 52 by threaded members such as screws or bolts. In addition, the diffuser 51 and the mounting portion 52 of the embodiment of the present application can be formed by injection molding, which has a simple processing technology, can reduce the number of parts, and improve assembly efficiency. When the embodiment of the present application is working, the airflow blown by the fan 91 can smoothly enter the diffuser cavity 12 along the volute tongue 40, which can reduce the generation of noise and abnormal sound.

[0085] See also Figures 8 to 9, at one end of the diffuser part 51 close to the mounting part 52, there is a return port 53 that penetrates through the opposite two surfaces in the thickness direction. The return port 53 communicates the diffuser cavity 12 and the fan cavity 11. During operation, when the air flow flows from the fan cavity 11 to the diffuser cavity 12, under the pressure difference in the inlet and outlet directions of the return port 53, part of the air flow in the diffuser cavity 11 will be sent back to the fan cavity 11 through the return port 53 and enter the fan cavity 11 to do work again, which can make up for the low-pressure area near the volute tongue 40, weaken the eddy current caused by the pressure difference, and thus improve the aerodynamic performance of the air duct assembly 10. Such a reverse flow design helps to stabilize the air flow in the flow field, reduce the noise and abnormal noise generated in the air duct, and has a simple setting method and is convenient for production. Further, please refer to Figure 11 , at the bottom of one side of the mounting part 52 close to the return port 53, there is a guiding surface 521 that extends towards the fan cavity 11. By setting the length of the guiding surface 521, the efficiency of the air flow in the diffuser cavity 12 flowing back to the fan cavity 11 can be controlled and adjusted. In the embodiment of the present application, by reasonably designing the guiding surface 521, the flow path of the air flow can be optimized, and the generation of noise can be further reduced. This design has strong flexibility and is applicable to air duct assemblies 10 of different size specifications. The embodiment of the present application can reduce noise and at the same time can adapt to air duct assemblies 10 of different size specifications.

[0086] As Figures 8 to 10 shown, in some embodiments, the water receiving tray 60 includes a water receiving part 61 and a drainage part 62 connected to each other. The water receiving part 61 is configured to carry the heat exchanger 92 and is connected to the lower shell 50 of the diffuser cavity. The water receiving part 61 is formed with a water receiving groove 611 that is open upwards. The drainage part 62 is arranged on one side of the water receiving part 61 and communicates with the water receiving groove 611; wherein, the bottom wall of the water receiving groove 611 slopes downwards in the direction towards the drainage part 62. When the heat exchanger 92 works, the water generated on the surface of the heat exchanger 92 flows to the bottom wall of the water receiving groove 611 under the action of gravity. Since the bottom wall of the water receiving groove 611 slopes downwards in the direction towards the drainage part 62, the flow rate of the condensed water in the water receiving groove 611 can be further increased to prevent the condensed water from staying in the water receiving groove 611 for too long. Finally, the condensed water flows into the drainage part 62 and is discharged from the drainage part 62.

[0087] The water receiving tray 60 of the embodiment of the present application can achieve a good water collection and diversion effect, avoiding the accumulation of condensed water in the water receiving tray 60, which may breed bacteria and even corrode the water receiving tray 60. In some embodiments, a lapping boss 612 is protruded on the bottom wall of the water receiving groove 611. The lapping boss 612 is configured to carry the heat exchanger 92 and cooperate with the heat exchanger 92 to divide the heat exchange chamber 13 into a pre-heat exchange chamber 131 and a post-heat exchange chamber 132. Among them, the pre-heat exchange chamber 131 communicates with the diffuser chamber 12, and the post-heat exchange chamber 132 communicates with the air outlet 15. It can be understood that when the heat exchanger 92 works, condensed water will accumulate in the water receiving groove 611. A lapping boss 612 protruding upward is provided on the bottom wall of the water receiving groove 611, and then the heat exchanger 92 is installed and fixed on the lapping boss 612, which can avoid the phenomenon that the side plates of the heat exchanger 92 rust due to being soaked in water, and thus can extend the service life of the heat exchanger 92.

[0088] Please refer to Figure 6 and Figure 11 , the opening size of the post-heat exchange chamber 132 is set to decrease in the direction from the lapping boss 612 to the air outlet 15. Such a setting can, on the one hand, improve the wind speed efficiency of the air outlet of the embodiment of the present application, and on the other hand, make the height of the air outlet 15 slightly higher than the height of the bottom wall of the heat exchange chamber 13, which can prevent water from being blown out and avoid the condensed water generated at the air outlet 15 from easily dripping into the room. In some embodiments, the bottom wall of the post-heat exchange chamber 132 is arranged in an arc shape, and the bottom wall of the post-heat exchange chamber 132 extends upward in the direction from the lapping boss 612 to the air outlet 15. The arc-shaped structure has less wind resistance to the air flow, better diversion effect, and can also reduce noise. Optionally, in other embodiments, the bottom wall of the post-heat exchange chamber 132 can also be arranged in an inclined plane. In some embodiments, a water storage groove 621, a drain pipe 622 and a water pump mounting block 623 are provided in the drainage part 62. Among them, the drain pipe 622 is located in the water storage groove 621. Since the bottom wall of the water receiving groove 611 slopes downward in the direction towards the drainage part 62, the water in the water receiving groove 611 can be guided into the drainage part 62. A water storage groove 621 is added to the drainage part 62, so that the water in the drainage part 62 flows into the water storage groove 621, thereby improving the drainage efficiency of the drain pipe 622. The water pump mounting block 623 can facilitate the installation and fixation of the water pump on the drainage part 62.

[0089] Such as Figures 8 to 9As shown, in some embodiments, the second housing 30 further includes a pipe routing portion 35. The pipe routing portion 35 is connected to the drainage portion 62 and one end in the length direction of the diffuser chamber lower housing 50. A through hole 353 is formed in the pipe routing portion 35, and the through hole 353 is used for the refrigerant pipe of the heat exchanger 92 to pass through, facilitating the connection of the refrigerant pipe of the heat exchanger 92 to the outdoor unit. The through hole 353 can be a long hole, which can facilitate the adjustment of the position of the refrigerant pipe and the installation operation of refrigerant pipes of different sizes. Among them, the pipe routing portion 35, the diffuser chamber lower housing 50, and the drainage portion 62 are integrally formed structures. With such a setting, the production efficiency and assembly efficiency are effectively improved, the number of components is greatly reduced, and the logistics cost is reduced. In some embodiments, the pipe routing portion 35 includes a first connecting plate 351 that is horizontally arranged and connects the side portions of the drainage portion 62 and the diffuser chamber lower housing 50, and a second connecting plate 352 that is vertically arranged on the first connecting plate 351. Among them, the through hole 353 is formed in the first connecting plate 351, and the second connecting plate 352 is located on one side of the through hole 353 and at the end far from the water receiving tray 60. The second connecting plate 352 is connected to the side portion of the diffuser chamber lower housing 50. During installation, the end of the first connecting plate 351 close to the blower chamber 11 forms a horizontal bearing portion, and the end of the second connecting plate 352 close to the blower chamber 11 forms an abutting portion. The side wall plate 70 is relatively fixed on the horizontal bearing portion and the abutting portion, which not only facilitates the installation and fixation of the second housing 30 and the side wall plate 70, but also facilitates fixation during installation.

[0090] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects: By integrally molding the diffuser chamber lower housing 50, the water receiving tray 60, and the pipe routing portion 35 by injection molding to obtain the second housing 30, the advantages of high production efficiency, reduction in the use of molds, and reduction in production costs are obtained. Moreover, it is convenient to install and fix components such as the volute tongue 40, the heat exchanger 92, the electric control box assembly 93, and the water pump. The space utilization rate is high, making the structure of the product simpler and more compact. The blower chamber 11, the diffuser chamber 12, and the heat exchange chamber 13 are more smoothly connected to each other, making the air flow and guidance in the air duct smoother.

[0091] In the drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components; in the description of the present application, it should be understood that if there are terms such as "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the drawings are only for illustrative purposes and cannot be construed as a limitation of the present application. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0092] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included within the protection scope of the present application.

Claims

1. An air duct assembly is applied to an air conditioning device, and the air conditioning device includes a fan and a heat exchanger. It is characterized in that The air duct assembly includes a first housing and a second housing. The first housing and the second housing cooperate to define a communicating diffuser chamber, a heat exchange chamber, and an air outlet communicating with the heat exchange chamber. The diffuser chamber is configured to communicate with the air outlet side of the fan, and the heat exchange chamber is configured to accommodate the heat exchanger; The second housing includes a diffuser chamber lower housing and a water receiving tray connected to each other. The diffuser chamber lower housing defines the bottom wall of the diffuser chamber, and the water receiving tray defines the bottom wall of the heat exchange chamber; Wherein, the diffuser chamber lower housing and the water receiving tray are integrally formed members.

2. The air duct assembly according to claim 1, characterized in that, The diffuser chamber lower housing and the water receiving tray are smoothly transitioned at the connection from the diffuser chamber to the heat exchange chamber.

3. The air duct assembly according to claim 1, characterized in that, The diffuser chamber lower housing slopes upward in a direction away from the water receiving tray. A fan chamber communicating with the diffuser chamber is further defined between the first housing and a side of the diffuser chamber lower housing away from the water receiving tray. The fan chamber is configured to accommodate the fan; The first housing and the second housing cooperate to define an air return opening communicating with the fan chamber, and at least part of the air return opening faces downward.

4. The air duct assembly according to claim 3, characterized in that, The second housing further includes a fan chamber front housing connected to a side of the diffuser chamber lower housing away from the water receiving tray. The first housing includes a fan chamber rear housing. The fan chamber front housing and the fan chamber rear housing define the fan chamber and the air return opening; A first downstream end of the fan chamber front housing and a second downstream end of the fan chamber rear housing are flush with each other in the horizontal direction, and the air return opening is provided below the fan; or A first downstream end of the fan chamber front housing and a second downstream end of the fan chamber rear housing are not flush with each other in the horizontal direction, so that at least part of the air return opening is located in front of or behind the fan.

5. The air duct assembly according to claim 4, wherein It further includes a volute tongue, and the volute tongue is fixed at the transition joint between the fan chamber front housing and the diffuser chamber lower housing.

6. The air duct assembly according to claim 1, wherein, The air outlet faces in the horizontal direction.

7. The air duct assembly according to any one of claims 1 to 6, characterized in that, The water receiving tray includes a water receiving portion and a drainage portion connected to each other. The water receiving portion is configured to carry the heat exchanger and is connected to the diffuser chamber lower housing. An upwardly open water receiving groove is formed in the water receiving portion, and the drainage portion is provided on one side of the water receiving portion and communicates with the water receiving groove; Wherein, the bottom wall of the water receiving groove slopes downward in a direction towards the drainage portion.

8. The air duct assembly according to claim 7, wherein, The second housing further includes a pipe routing portion, and the pipe routing portion connects the drainage portion and a side portion of the diffuser chamber lower housing. A through hole for passing the refrigerant pipe of the heat exchanger is formed in the pipe routing portion; Wherein, the pipe routing portion, the diffuser chamber lower housing, and the drainage portion are of an integral structure.

9. The air duct assembly according to claim 7, characterized in that, A lapping boss protrudes from the bottom wall of the water receiving groove. The lapping boss is configured to carry the heat exchanger and, in cooperation with the heat exchanger, divides the heat exchange chamber into a pre-heat exchange chamber and a post-heat exchange chamber. The pre-heat exchange chamber communicates with the diffuser chamber; the post-heat exchange chamber communicates with the air outlet; Wherein, the opening size of the post-heat exchange chamber is decreased in a direction from the lapping boss to the air outlet.

10. The air duct assembly according to claim 9, characterized in that, The bottom wall of the post-heat exchange chamber is arranged in an arc shape, and the bottom wall of the post-heat exchange chamber extends upward in a direction from the lapping boss to the air outlet.

11. An air conditioning device, characterized in that, It includes a fan, a heat exchanger and the air duct assembly according to any one of claims 1 to 10. The air outlet side of the fan communicates with the diffuser chamber, and the heat exchanger is arranged in the heat exchange chamber.

12. The air conditioning device according to claim 11, characterized in that, The heat exchanger is arranged in an arc shape, and the number of refrigerant pipes in the middle of the heat exchanger is more than that on both sides of the heat exchanger. Wherein, the central axis of the diffuser chamber penetrates through the middle of the heat exchanger.

13. The air conditioning device according to claim 11, characterized in that, It further includes an electric control box assembly, and the electric control box assembly is arranged on the lower side of the lower shell of the diffuser chamber. Wherein, at least part of the air return opening is arranged on the front side of the fan and is arranged at an interval from the electric control box assembly.

14. The air conditioning device according to claim 13, characterized in that, It further includes an air duct interface, and the air duct interface is connected to the first housing and / or the second housing and is located between the side of the water receiving tray close to the lower shell of the diffuser chamber and the side of the first housing away from the water receiving tray. Wherein, the air duct interface is arranged in a surrounding manner below the air return opening and the electric control box assembly.

15. The air conditioning device according to claim 11, characterized in that, The fan is a cross-flow impeller.

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