Fan assembly and air conditioner indoor unit

Abstract

The utility model discloses a fan assembly and an air conditioner indoor unit. The problems that an existing fan assembly is large in noise and low in air volume are solved. The fan assembly comprises a volute, the inner wall molded line, parallel to the section of an air inlet of the volute, of the volute comprises an air inlet curve section, a volute tongue section, a first flow guide section and a second flow guide section, the second flow guide section is a linear section and extends from the second end of the air inlet curve section to the air outlet of the volute, and the first flow guide section and the second flow guide section are perpendicular to each other. The first end of the second flow guide section is connected with the second end of the air inlet curve section; an air outlet flow guide air duct is formed between the first flow guide section and the second flow guide section, and the volute air outlet is formed between the second end of the first flow guide section and the second end of the second flow guide section; the length of the second flow guide section is not smaller than the length of the volute air outlet from the second end of the second flow guide section to the second end of the first flow guide section.

Description

Technical Field

[0001] This utility model belongs to the field of air conditioning technology, specifically, it relates to a fan assembly and an indoor unit of an air conditioner having the fan assembly. Background Technology

[0002] The indoor unit of an air conditioner houses a fan assembly and a heat exchanger. Airflow from the environment surrounding the indoor unit enters through the return air vent of the indoor unit under the action of the fan and is then sent to the heat exchanger for heat exchange. The heat-exchanged airflow is then delivered back into the environment surrounding the indoor unit through the supply air vent, thus regulating the ambient air. The centrifugal fan assembly includes a volute and an impeller. The profile and structure of the volute have a significant impact on the fan's airflow and noise levels, making it a key factor affecting the indoor unit's air delivery performance. With increasing demands for quality of life and more frequent weather anomalies, air conditioners are being used more frequently, and users are demanding higher air delivery performance. Optimizing the structure of the fan assembly, especially the volute profile and structure, to achieve ideal air delivery performance is a technical problem that requires continuous research and solutions. Summary of the Invention

[0003] One of the objectives of this invention is to provide a fan assembly that, by adjusting the profile of the volute in the fan assembly, achieves the goal of increasing the air volume and reducing the air supply noise of the fan assembly.

[0004] To solve the above-mentioned technical problems, the fan assembly provided by this utility model adopts the following technical solution:

[0005] A fan assembly includes a volute, on which a volute inlet and a volute outlet are formed. The inner wall profile of the volute on a cross-section parallel to the volute inlet includes:

[0006] The air inlet curve segment extends around the circumference of the volute air inlet.

[0007] The volute tongue section is located between the air inlet and the air outlet of the volute, and the first end of the volute tongue section is connected to the first end of the air inlet curve section.

[0008] The first guide section extends from the second end of the volute tongue section toward the air outlet of the volute, and the first end of the first guide section is connected to the second end of the volute tongue section.

[0009] The second guide section is a straight section that extends from the second end of the air inlet curve section toward the air outlet of the volute. The first end of the second guide section is connected to the second end of the air inlet curve section.

[0010] An air outlet duct is formed between the first guide section and the second guide section, and the volute air outlet is formed between the second end of the first guide section and the second end of the second guide section.

[0011] The length of the second guide section is not less than the length of the volute air outlet from the second end of the second guide section to the second end of the first guide section.

[0012] In some embodiments of this application, the length of the second guide section is H1, and the length of the volute air outlet is H2. H1 and H2 satisfy the following relationship: H1=k1×H2; k1 is a first coefficient, 1≤k1≤1.25.

[0013] In some embodiments of this application, a guide portion is formed in the air outlet guide duct near the second guide section, the guide portion extends along the air outlet direction of the air outlet guide duct, and the guide surface of the guide portion is curved.

[0014] Another objective of this invention is to provide an indoor unit for an air conditioner that has a large air volume and low noise.

[0015] To achieve the above technical objectives, the indoor unit of the air conditioner provided by this utility model adopts the following technical solution:

[0016] An indoor unit of an air conditioner includes a housing that forms a cavity, a heat exchanger is disposed within the cavity, the housing includes an air outlet panel with an air inlet formed thereon, and a fan assembly is also disposed within the cavity, the air outlet of the fan assembly's volute facing the heat exchanger.

[0017] In some embodiments of this application, a baffle plate is further provided between the heat exchanger and the air outlet panel, and a heat exchange airflow duct is formed between the baffle plate and the heat exchanger.

[0018] The wind deflector includes:

[0019] A first sidewall, which corresponds to one end of the heat exchanger, extends along the height direction of the heat exchanger;

[0020] A second sidewall is disposed opposite to the first sidewall and corresponds to the other side end of the heat exchanger, and the second sidewall extends along the height direction of the heat exchanger.

[0021] A bottom wall, which connects the first side wall and the second side wall and extends along the height direction of the heat exchanger, and the bottom wall is close to the air outlet panel;

[0022] The bottom wall, the first side wall, and the second side wall form an air cavity with an opening facing the heat exchanger.

[0023] In some embodiments of this application, the bottom wall includes an air guide section, which is an arc-shaped air guide section protruding toward the air outlet panel.

[0024] In some embodiments of this application, the distance between the arc-shaped air guide section and the air outlet panel gradually decreases from the end of the arc-shaped air guide section away from the air outlet to the end of the arc-shaped air guide section closer to the air outlet.

[0025] In some embodiments of this application, the bottom wall further includes:

[0026] The installation section has an installation part formed on the end of the arc-shaped air guide section away from the air outlet, and the baffle plate is installed in the cavity through the installation part.

[0027] In some embodiments of this application, the distance between the mounting section and the air outlet panel is greater than the distance between the end of the arc-shaped air guide section away from the air outlet and the air outlet panel;

[0028] The bottom wall also includes:

[0029] A transition section connects the air guide section and the mounting section, and the transition section extends from the mounting section to the air guide section with a sloping structure.

[0030] In some embodiments of this application, the bottom wall further includes:

[0031] The extension section is a planar section. One end of the extension section is connected to the end of the air guide section near the air outlet and extends upward. The other end of the extension section forms an outward flange relative to the air cavity.

[0032] Compared with the prior art, the advantages and positive effects of this utility model are:

[0033] The fan assembly and indoor unit of the air conditioner provided by this utility model, by setting a second guide section with a straight section between the air inlet curve section on the opposite side of the volute tongue in the volute of the fan assembly and the air outlet of the volute, and setting the length of the second guide section to be not less than the length of the air outlet of the volute, can perform long-distance rectification of the airflow from the air inlet curve section by using the second guide section with a longer straight section, reducing the vortex generated by the airflow passing through the air inlet curve section, reducing airflow noise, reducing airflow loss and air supply energy consumption, making the airflow more concentrated, thereby increasing the smoothness of the airflow from the air outlet of the volute, and increasing the air volume of the air outlet of the volute under the same operating conditions, thereby achieving the purpose of increasing the air supply volume of the fan assembly and reducing the air supply noise.

[0034] Other features and advantages of this utility model will become clearer after reading the detailed embodiments of this utility model in conjunction with the accompanying drawings. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a perspective view of one embodiment of the fan assembly of this utility model;

[0037] Figure 2 This is a cross-sectional view of one embodiment of the fan assembly of this utility model;

[0038] Figure 3 This is a cross-sectional view of another embodiment of the wind turbine assembly of this utility model;

[0039] Figure 4 This is a perspective view of an embodiment of the indoor unit of the air conditioner according to the present invention;

[0040] Figure 5 for Figure 4 Exploded view of the embodiment;

[0041] Figure 6 for Figure 4 One of the perspective views of the wind deflector in the embodiment;

[0042] Figure 7 for Figure 4 Second perspective view of the wind deflector in the embodiment;

[0043] Figure 8 for Figure 4 The third perspective view of the wind deflector in the embodiment;

[0044] Figure 9 for Figure 4 Side view of the wind deflector in the embodiment.

[0045] The reference numerals and their corresponding component names in the above figures are as follows:

[0046] 11. First side housing; 12. Second side housing; 13. Rear panel; 14. Cavity;

[0047] 2. Heat exchanger; 3. Water receiving components;

[0048] 4. Fan assembly;

[0049] 411. Snail shell;

[0050] 4111, volute air inlet; 4112, volute air outlet; 4113, air inlet curve section; 4114, volute tongue section; 4115, first guide section; 4116, second guide section;

[0051] 412. Impeller; 413. Guide section

[0052] 4213. Inlet curve section; 4215. First guide section;

[0053] 5. Windshield;

[0054] 51. First sidewall;

[0055] 52. First sidewall outward flange; 521. First assembly part; 522. First snap-fit ​​part;

[0056] 53. Second sidewall;

[0057] 54. Second sidewall outward flange; 541. Second assembly part; 542. Second snap-fit ​​part;

[0058] 55. Bottom wall; 551. Air guide section; 552. Installation section; 5521. Installation part; 553. Transition section; 554. Extension section;

[0059] 56. Extended section with outward flange. Detailed Implementation

[0060] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0061] It should be noted that in the description of this utility model, the terms "upper", "lower", "left", "right", "front", "rear", "inner", "outer", etc., indicating the direction or positional relationship are based on the direction or positional relationship shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this utility model.

[0062] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0063] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "assembly," etc., should be interpreted broadly. For example, "assembly" can be a fixed assembly, a detachable assembly, or an integral unit; "connection" can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0064] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0065] Figure 1 and Figure 2 A perspective view and a cross-sectional view of one embodiment of the fan assembly of this utility model are shown respectively. In this embodiment, the fan assembly includes a volute 411 and an impeller 412, with the impeller 412 disposed within the air cavity formed by the volute 411. The volute 411 has a volute inlet 4111 and a volute outlet 4112. The impeller 412 rotates under the drive of a drive mechanism (not shown in the figure). Under the action of the impeller 412, external gas enters the air cavity inside the volute 411 from the volute inlet 4111 and is finally discharged from the volute outlet 4112.

[0066] exist Figure 1 and Figure 2 In the structural diagram shown, the volute air inlet 4111 is usually formed on the front or rear shell of the volute 411, and the volute air outlet 4112 is usually formed on the top of the volute 411. Figure 2 The cross-sectional view is a cross-sectional view parallel to the air inlet 4111 of the volute. On this cross-section, the inner wall profile of the volute 411 includes a first guide section 4115, a volute tongue section 4114, an air inlet curve section 4113, and a second guide section 4116 connected in sequence.

[0067] Specifically, the air inlet curve section 4113 extends around the circumference of the volute air inlet 4111, and is used to guide the high-speed airflow discharged from the impeller 412 along the curved path to the volute air outlet 4112.

[0068] The volute tongue section 4114 is located between the volute inlet 4111 and the volute outlet 4112, serving to isolate the volute inlet 4111 and the volute outlet 4112 and prevent airflow backflow. Furthermore, the first end of the volute tongue section 4114 near the volute inlet 4111 connects to the first end of the air inlet curve section 4113 located above the volute inlet 4111. The second end of the volute tongue section 4114 is the end opposite to the first end, and this second end is closer to the volute outlet 4112 than the first end of the volute tongue section 4114.

[0069] The first guide section 4115 extends from the second end of the volute tongue section 4114 toward the volute outlet 4112, and is used to rectify the airflow, reduce airflow noise and turbulence, and improve airflow uniformity. The first end, that is, the lower end, of the first guide section 4115 is connected to the second end of the volute tongue section 4114.

[0070] The second end of the inlet curve segment 4113 is opposite to its first end, and this second end is located below and to the side of the volute inlet 4111. The second guide segment 4116 is a straight segment that extends from the second end of the inlet curve segment 4113 toward the volute outlet 4112, and is used to rectify the airflow, reduce airflow noise and turbulence, and improve airflow uniformity. Furthermore, the first end B1 of the second guide segment 4116, that is, its lower end near the inlet curve segment 4113, is connected to the second end of the inlet curve segment 4113.

[0071] Thus, an air outlet duct is formed between the first guide section 4115 and the second guide section 4116, and a volute air outlet 4112 is formed between the second end A2 of the first guide section 4115 and the second end B2 of the second guide section 4116. Furthermore, the length of the second guide section 4116 is denoted as H1, and the length of the volute air outlet 4112 from the second end B2 of the second guide section 4116 to the second end A2 of the first guide section 4115 is denoted as H2. H1 and H2 satisfy the condition: H1 ≥ H2, that is, the length of the second guide section 4116 is not less than the length of the volute air outlet.

[0072] By setting a second guide section 4116 with a straight section between the inlet curve section 4113 on the opposite side of the volute tongue in the volute of the fan assembly volute 411 and the volute outlet 4112, and setting the length of the second guide section 4116 to be no less than the length of the volute outlet, the airflow from the inlet curve section 4113 can be rectified over a long distance using the second guide section 4116 with a longer straight section. This reduces the vortex generated by the airflow passing through the inlet curve section 4113, reduces airflow noise, reduces airflow loss and air supply energy consumption, and makes the airflow more concentrated. This increases the smoothness of the airflow exiting from the volute outlet 4112. Under the same operating conditions, the airflow volume of the volute outlet 4112 is increased, thereby achieving the purpose of increasing the air supply volume of the fan assembly and reducing air supply noise.

[0073] In some other embodiments, the length H1 of the second guide section and the length H2 of the volute outlet satisfy the following relationship: H1 = k1 × H2; k1 is a first coefficient, and 1 ≤ k1 ≤ 1.25. Therefore, by linearly adjusting the length of the second guide section according to the length of the volute outlet, the length of the second guide section can be conveniently and quantitatively set and adjusted, avoiding the situation where an excessively large length of the second guide section would result in an overly large overall size of the fan assembly, making it inconvenient to install in the indoor unit.

[0074] like Figure 1 As shown, a guide section 413 is formed in the air outlet guide duct formed between the first guide section 4115 and the second guide section 4116, near the second guide section 4116. The guide section 413 extends along the air outlet direction of the air outlet guide duct, that is, it extends in the up and down direction, and the guide surface of the guide section 413 is curved. By providing a guide section 413 with a guide surface near the second guide section 4116, the airflow passing through the straight section of the second guide section 4116 can be directed to flow in the same direction, reducing the influence of airflow turbulence at the angle between the straight section of the second guide section 4116 and the front and / or rear shells of the adjacent volute 411, thereby reducing wind loss and increasing the air volume delivered by the fan assembly.

[0075] exist Figure 1 and Figure 2 In the illustrated embodiment, the first guide section 4115 is a curved section. However, it is not limited to this; in other embodiments, the first guide section 4115 may also have other profile structures.

[0076] Figure 3 A cross-sectional view of another embodiment of the wind turbine assembly of this utility model is shown. Figure 1 and Figure 2 The same as the embodiments, Figure 3 The fan assembly of the embodiment includes a volute and an impeller, with a volute inlet and a volute outlet formed on the volute. Figure 3The cross-sectional view shown is parallel to the air inlet of the volute. In this cross-section, the inner wall profile of the volute also includes a first guide section 4215, a volute tongue section, an air inlet curve section 4213, and a second guide section connected in sequence. Figure 1 and Figure 2 The same structure as the embodiment, in Figure 3 It is not marked or explained in detail.

[0077] Figure 3 and Figure 1 The difference in the embodiment lies in the profile of the first guide section 4215 and the air inlet curve section 4213.

[0078] Specifically, in Figure 3 In this embodiment, the first guide section 4215 is a structure composed of a straight segment and a curved segment. Specifically, the first guide section 4215 includes a straight segment S1 and a curved segment S2 connected in sequence. The straight segment S1 is close to the volute tongue segment, and the curved segment S1 is away from the volute tongue segment and close to the air outlet of the volute. By using the straight segment S1 of the first guide section 4215, the airflow in the air outlet guide duct can be rectified and sorted, reducing airflow noise. By using the curved segment S2 at the end of the first guide section 4215, the air outlet area of ​​the volute can be increased, improving the smoothness of airflow, further slowing down the airflow velocity, and reducing turbulence at the air outlet of the volute.

[0079] The air inlet curve section 4213 extends downwards from the volute tongue section and includes a series of connected curve sections S3, S4, and S5, with the straight section S4 extending perpendicularly to the volute outlet. The air inlet curve section 4213 employs a curve + straight + curve profile structure, which can reduce the volute flow, lower volute noise, and improve airflow smoothness.

[0080] The fan components of the above embodiments can be applied to the indoor unit of an air conditioner to improve the air delivery performance of the indoor unit.

[0081] Figures 4 to 9 The image shows an embodiment of the indoor unit of the air conditioner according to this utility model. Wherein, Figure 4 and Figure 5 These are a perspective view and an exploded view of this embodiment, respectively. Figure 6 , Figure 7 and Figure 8 This is a perspective view of the wind deflector in this embodiment. Figure 9 This is a side view of the wind deflector.

[0082] like Figure 4 and Figure 5As shown, the indoor unit of this air conditioner embodiment includes a first side housing 11, a second side housing 12, a rear panel 13, and an air outlet panel (not shown in the figure, located opposite to the rear panel 13 and connected to the first side housing 11 and the second side housing 12) serving as the front panel. The first side housing 11, the second side housing 12, the rear panel 13, and the air outlet panel together constitute the housing of the indoor unit, forming a cavity 14. An air outlet (not shown in the figure) is formed on the air outlet panel, and an air inlet (not shown in the figure) is formed on the housing. A heat exchanger 2, a water receiving component 3, and a fan assembly 4 are disposed within the cavity 14. Other common structures of indoor units, such as electrical enclosures, are not shown in this embodiment and can be referred to in the prior art. In this embodiment, the fan assembly 4 adopts the structure of the fan assemblies in the above embodiments, and the air outlet of the volute of the fan assembly 4 faces the heat exchanger. The heat exchanger 2 is disposed above the fan assembly 4, and the water receiving component 3 is a water receiving tray disposed below the heat exchanger 2. However, it is not limited to this. The structure and location of the heat exchanger 2 and the water receiving component 3 can also be in other forms.

[0083] In this embodiment, the indoor and outdoor units of the air conditioner work together to regulate the air quality in the environment where the indoor unit is located. Specifically, in some indoor unit operating modes, such as cooling and heating modes, the airflow in the environment where the indoor unit is located enters through the air inlet of the casing under the action of the fan assembly 4 and is then sent to the heat exchanger 2 for heat exchange. The airflow after heat exchange is then sent back into the environment where the indoor unit is located through the air outlet of the air outlet panel to regulate the temperature of the ambient air. By using the fan assemblies of the above embodiments for air delivery, the air volume can be increased and the air delivery noise can be reduced.

[0084] In this embodiment, a baffle plate 5 is also provided inside the cavity 14 of the indoor unit. Specifically, the baffle plate 5 is disposed between the heat exchanger 2 and the air outlet panel, and a heat exchange airflow duct is formed between the baffle plate 5 and the heat exchanger 2.

[0085] Combination Figures 6 to 9 As shown, the baffle plate 5 includes a first sidewall 51, a second sidewall 53, and a bottom wall 55. The first sidewall 51 corresponds to one end of the heat exchanger 2 and extends along the height direction of the heat exchanger 2; the second sidewall 53 is disposed opposite to the first sidewall and also corresponds to the other end of the heat exchanger 2, extending along the height direction of the heat exchanger 2. The bottom wall 55 connects the first sidewall 51 and the second sidewall 53, extends along the height direction of the heat exchanger 2, and is close to the air outlet panel. The bottom wall 55, the first sidewall 51, and the second sidewall 53 form an air cavity with an opening facing the heat exchanger 2.

[0086] Specifically, in Figures 4 to 9In the illustrated embodiment, with the air inlet panel as the front and the first side wall 51 as the rear and the panel 13 as the rear, the first side housing 11 is the left side housing, the second side housing 12 is the right side housing, the first side wall 51 of the baffle plate 5 is the right side wall, and the second side wall 53 is the left side wall. The first side wall 51 corresponds to the position of the right end of the heat exchanger 2 and extends along the height direction of the heat exchanger 2, that is, the vertical direction; the second side wall 53 corresponds to the position of the left end of the heat exchanger 2 and extends along the height direction of the heat exchanger 2, that is, the vertical direction. The bottom wall 55 extends from the front edge of the first side wall 51 to the front edge of the second side wall 53 in the left and right directions, and extends from the lower ends of the first side wall 51 and the second side wall 53 to the upper ends of the first side wall 51 and the second side wall 53 in the vertical direction. The bottom wall 55, the first side wall 51, and the second side wall 53 form an air cavity with an opening facing the heat exchanger 2.

[0087] After the baffle 5 is installed in the indoor unit, the airflow of the environment where the indoor unit is located enters from the air inlet of the casing under the action of the fan assembly 4 and is sent to the heat exchanger 2 for heat exchange. After heat exchange, the airflow is blocked by the baffle 5, passes through the air cavity formed by the baffle 5 and the airflow duct between the baffle and the heat exchanger, and is then sent into the environment where the indoor unit is located from the air outlet of the air outlet panel to regulate the temperature of the ambient air. Since the baffle 5 is located between the heat exchanger 2 and the air outlet panel where the air outlet is located, it isolates the flow of the airflow after heat exchange to the inside of the air outlet panel. Since the outside of the air outlet panel is in contact with the ambient airflow, and the airflow after heat exchange is usually airflow with a large temperature difference relative to the ambient airflow, if the cold and hot airflows convect, it will affect the temperature of the airflow sent from the air outlet, making the temperature of the sent airflow unsuitable for air conditioning, resulting in a decrease in the heat exchange efficiency of the heat exchanger. Furthermore, if cold and hot airflows convect on the air outlet panel, condensation is easily generated. This condensation forms and drips from the inside of the air outlet panel, causing high internal humidity and affecting the safety and lifespan of the electrical components inside the indoor unit. Condensation also forms and drips onto the ground from the outside of the air outlet panel, causing soiling and damage. Therefore, by utilizing the wind deflector 5, the convection of cold and hot airflows on both sides of the air outlet panel effectively prevents changes in the temperature of the heat exchange airflow exiting the air outlet, thus avoiding a decrease in the heat exchanger's efficiency. Moreover, it also prevents the formation of condensation in the indoor unit due to the convection of cold and hot airflows, thus avoiding a decrease in the safety and lifespan of the electrical components inside the indoor unit, as well as soiling and damaging the ground.

[0088] See also Figures 4 to 9The bottom wall 55 includes an air guide section 551, which is an arc-shaped air guide section protruding towards the air outlet panel. The arc-shaped air guide section 551 serves two purposes: firstly, by guiding the heat exchange airflow using the arc-shaped air guide section, airflow noise can be reduced, wind resistance can be decreased, airflow loss can be reduced, and airflow efficiency can be improved; secondly, the arc-shaped air guide section protruding towards the air outlet panel can increase the air cavity space, increase the airflow volume, and further reduce airflow loss and airflow noise.

[0089] In some other embodiments, the lower end of the arc-shaped air guide section 551 is away from the air outlet, and the upper end is close to the air outlet. The distance between the arc-shaped air guide section 551 and the air outlet panel gradually decreases from the lower end to the upper end of the air guide section 551. This causes the air cavity of the baffle plate 5 to gradually contract from bottom to top. The lower end of the air cavity is close to the fan assembly 4, which easily generates wind resistance and noise. By setting the air guide section 551, the space at the lower end of the air cavity is made large enough to minimize wind resistance, reduce airflow loss, and reduce airflow noise. By setting the air guide section 551, the space at the upper end of the air cavity is reduced, which increases the flow velocity of the heat exchanger airflow flowing out from the upper end near the air outlet, ensuring that the heat exchanger airflow is delivered from the air outlet at a higher wind speed and improving air delivery efficiency.

[0090] To ensure stable assembly of the baffle 5 and avoid significant noise and airflow loss due to unstable assembly, the bottom wall 55 also includes a mounting section 552. This mounting section 552 is located near the end of the air guide section 551 away from the air outlet, i.e., at the lower end of the air guide section 551. A mounting part 5521 is formed on the mounting section 552, through which the baffle 5 is mounted in the cavity 14.

[0091] In some embodiments, the mounting section 552 is located at the lowest point of the entire bottom wall 55, which facilitates improved assembly convenience and stability. Multiple mounting holes are formed on the water receiving component 3, and the mounting portion 5521 includes multiple mounting holes. The multiple mounting holes on the mounting section 552 cooperate with the multiple mounting holes on the water receiving component 3, and the baffle 5 is installed to the water receiving component 3 using screws. By placing the mounting section 552 at the lowest point of the bottom wall 55, the baffle 5 is assembled to the water receiving component 3 via the mounting section 552. Since the water receiving component 3 is typically located below the heat exchanger 2, the air cavity of the baffle 5 can be positioned close to the lower end of the heat exchanger 2. This facilitates rapid and complete noise reduction and wind resistance reduction of the airflow after heat exchange starting from the lower end of the heat exchanger 2, improving the effectiveness of the baffle application.

[0092] To facilitate assembly, the distance between the mounting section 552 and the air outlet panel is greater than the distance between the lower end of the guide section 551 (away from the air outlet) and the air outlet panel, thus providing a larger operating space between the mounting section 552 and the air outlet panel for easier assembly. To reduce wind resistance, in this structure where the distance between the mounting section 552 and the air outlet panel is greater than the distance between the lower end of the guide section 551 (away from the air outlet) and the air outlet panel, the bottom wall 55 also includes a transition section 553 connecting the guide section 551 and the mounting section 552. The transition section 553 extends from the mounting section 552 to the guide section 551 with a sloping structure. By providing the sloping structure of the transition section 553, in addition to connecting the mounting section 552 and the guide section 551 (which are not on the same plane), it also provides a guide surface for airflow buffering, further reducing wind resistance and noise. The sloping structure of the transition section 553 can be a sloping plane or a sloping arc surface; this embodiment does not specifically limit the sloping structure.

[0093] To achieve stable assembly of the wind deflector 5 and avoid significant noise and airflow loss due to unstable assembly, a first sidewall outward flange 52 is formed on the first sidewall 51 of the wind deflector 5, facing outward relative to the air cavity, and a first mounting portion 521 is formed on the first sidewall outward flange 52; a second sidewall outward flange 54 is formed on the second sidewall 53 of the wind deflector 5, facing outward relative to the air cavity, and a second mounting portion 541 is formed on the second sidewall outward flange 54. The wind deflector 5 is assembled into the cavity 14 via the first mounting portion 521 and the second mounting portion 541. In some embodiments, the first mounting portion 521 and the second mounting portion 541 each include multiple mounting holes. Using screws and the multiple mounting holes on the first mounting portion 521 and the second mounting portion 541, the wind deflector 5 is installed to the housing and / or the frame, bracket, or other structures in the housing, thereby achieving a stable assembly of the wind deflector 5 within the cavity 14.

[0094] To achieve accurate and rapid assembly of the wind deflector 5, a first snap-fit ​​portion 522 is formed on the outer flange 52 of the first side wall, and a second snap-fit ​​portion 542 is formed on the outer flange 54 of the second side wall. During assembly, the wind deflector 5 is pre-positioned by the snap-fit ​​engagement of the first snap-fit ​​portion 522 and the second snap-fit ​​portion 542 with the corresponding snap-fit ​​portions inside the cavity. After positioning, it is then assembled and installed through the assembly part, installation part, etc., improving assembly efficiency. In some embodiments, the first snap-fit ​​portion 522 may include a plurality of claws, and similarly, the second snap-fit ​​portion 542 may include a plurality of claws. The housing of the indoor unit and / or the frame, bracket, and other structures in the housing are provided with slots that engage with the claws. Of course, the first snap-fit ​​portion 522 and the second snap-fit ​​portion 542 may also adopt other structures that can achieve snap-fit ​​assembly, and this embodiment does not limit this.

[0095] To improve the structural strength of the baffle plate 5, the bottom wall 55 also includes an extension section 554. This extension section 554 is a planar section, one end of which, i.e., the lower end of the extension section 554, connects to the upper end of the air guide section 551 near the air outlet and extends upward. The other end of the extension section 554, i.e., its upper end, forms an extension section outward flange 56 relative to the air cavity. That is, the extension section outward flange 56 extends from the top of the extension section 554 toward the air outlet panel. The extension section 554 can be a straight planar section or an inclined planar section; the extension section outward flange 56 can be a planar section to reduce the space occupied by the indoor unit in the limited vertical direction.

[0096] like Figure 9 As shown, along the airflow direction of the air cavity, i.e., the up-down direction, the length of the entire air cavity is L1, including the length of the air cavity enclosed by all sections of the bottom wall; the length of the airflow guide section is L2. Furthermore, the ratio of the length of the windbreak section to the length of the entire air cavity is not less than 0.8, i.e., L2 / L1≥0.8. This design allows the air cavity formed by the airflow guide section to be as large as possible. The air cavity formed by the airflow guide section is a key air cavity for reducing wind resistance and noise, thereby maximizing the reduction of wind resistance and noise and increasing the airflow volume.

[0097] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions claimed by this utility model.

Claims

1. A fan assembly comprising a volute having a volute inlet and a volute outlet formed therein, characterised in that, The inner wall profile of the volute on a section parallel to the volute air inlet comprises: an air inlet curve segment extending in the circumferential direction of the volute air inlet; a volute tongue segment between the volute air inlet and the volute air outlet, a first end of the volute tongue segment being connected to a first end of the air inlet curve segment; a first flow guide segment extending from a second end of the volute tongue segment to the volute air outlet, a first end of the first flow guide segment being connected to the second end of the volute tongue segment; a second flow guide segment, which is a straight segment, extending from a second end of the air inlet curve segment to the volute air outlet, a first end of the second flow guide segment being connected to the second end of the air inlet curve segment; an air outlet flow guide air duct being formed between the first flow guide segment and the second flow guide segment, and the volute air outlet being formed between a second end of the first flow guide segment and a second end of the second flow guide segment; a length of the second flow guide segment being not less than a volute air outlet length of the volute air outlet between the second end of the second flow guide segment and the second end of the first flow guide segment.

2. The fan assembly of claim 1, wherein, The length of the second flow guide segment is H1, the volute air outlet length is H2, and H1 and H2 satisfy H1=k1×H2; k1 is a first coefficient, and 1≤k1≤1.

25.

3. The fan assembly of claim 1 or 2, wherein, A flow guide portion is formed in the air outlet flow guide air duct, close to the second flow guide segment, the flow guide portion extending in the air outlet direction of the air outlet flow guide air duct, and a flow guide surface of the flow guide portion being a curved surface.

4. An indoor unit of an air conditioner, comprising a housing, the housing enclosing a cavity, a heat exchanger being arranged in the cavity, the housing comprising an air outlet panel, an air outlet being formed in the air outlet panel; characterized in that, The cavity further comprises the fan assembly according to any one of claims 1 to 3, and a volute air outlet of the fan assembly faces the heat exchanger.

5. The air conditioner indoor unit according to claim 4, wherein A baffle plate is further arranged between the heat exchanger and the air outlet panel, and a heat exchange air flow flow guide air duct is formed between the baffle plate and the heat exchanger. The baffle plate comprises: a first side wall corresponding to one side end position of the heat exchanger, the first side wall extending in the height direction of the heat exchanger; a second side wall arranged opposite to the first side wall and corresponding to another side end position of the heat exchanger, the second side wall extending in the height direction of the heat exchanger; a bottom wall connected between the first side wall and the second side wall and extending in the height direction of the heat exchanger, and the bottom wall being close to the air outlet panel; the bottom wall, the first side wall and the second side wall surrounding an air cavity with an opening, and the opening of the air cavity facing the heat exchanger.

6. The air conditioner indoor unit according to claim 5, wherein The bottom wall comprises an air guide segment, which is an arc-shaped air guide segment protruding towards the air outlet panel.

7. The air conditioner indoor unit according to claim 6, wherein A distance between the arc-shaped air guide segment and the air outlet panel gradually decreases from one end of the arc-shaped air guide segment away from the air outlet to the other end of the arc-shaped air guide segment close to the air outlet.

8. The indoor unit of claim 7, wherein, The bottom wall further comprises: an installation segment close to one end of the arc-shaped air guide segment away from the air outlet, and an installation portion being formed on the installation segment, and the baffle plate being installed in the cavity through the installation portion.

9. The air conditioner indoor unit according to claim 8, characterized in that, A distance between the installation segment and the air outlet panel is greater than a distance between one end of the arc-shaped air guide segment away from the air outlet and the air outlet panel; the bottom wall further comprises: A transition section is connected between the air guide section and the mounting section, and the transition section extends from the mounting section to the air guide section in a slope structure.

10. The air conditioner indoor unit according to claim 6, wherein The bottom wall further comprises: An extension section is a planar section, one end of the extension section is connected with one end of the air guide section close to the air outlet and extends upward, and the other end of the extension section is formed with an extension section outward turning edge outward relative to the air cavity.

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