Air conditioner indoor unit and heating, ventilation, and air conditioning device

Abstract

The present application discloses an air conditioner indoor unit and a heating, ventilation, and air conditioning device. The air conditioner indoor unit comprises a housing, a water receiving tray, a blower wheel, and a heat exchanger. A heat exchange air duct is formed in the housing; the housing comprises an enclosure and a volute, wherein the volute is disposed in the enclosure and connected to the enclosure; the volute defines an upper air duct wall surface portion of the heat exchange air duct; the blower wheel and the heat exchanger are arranged in the heat exchange air duct; and the volute comprises an air duct surface and a back surface that are arranged facing away from each other, wherein the air duct surface forms the upper air duct wall surface portion of the heat exchange air duct, and an air heat-insulation cavity is formed between the back surface and the inner wall surface of the enclosure by means of spacing. The technical solution of the present application simplifies the structure of an air conditioner indoor unit, and reduces the cost of the air conditioner indoor unit.

Description

Air conditioning indoor units and HVAC equipment

[0001] This application claims priority to four Chinese patent applications filed with the State Intellectual Property Office on March 25, 2024, with application number 2024103450333 and application name “Air conditioning indoor unit and HVAC equipment”, application number 2024205863887 and application name “Air conditioning indoor unit and HVAC equipment”, application number 2024205990859 and application name “Air conditioning indoor unit and HVAC equipment”, and application number 2024103451374 and application name “Air conditioning indoor unit and HVAC equipment”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the technical field of HVAC equipment, and in particular to an air-conditioning indoor unit and HVAC equipment using the air-conditioning indoor unit. Background Art

[0003] HVAC equipment includes an indoor air conditioner unit, which consists of an outer casing, a volute, a fan, a heat exchanger, a drain pan, and other components housed within it. The fan and heat exchanger are both located within the heat exchange duct, with the fan as a key component. The fan rotates under the influence of a motor, driving external air through the duct, exchanging heat with the heat exchanger to regulate temperature and humidity.

[0004] When the indoor unit of the air conditioner is in cooling mode, the volute is in direct contact with the cooled cold air, so the temperature of the volute itself is relatively low. The cold air after cooling can be dissipated outward through the volute and the outer casing in turn. On the one hand, this will lead to reduced energy efficiency. On the other hand, condensation water will form on the outer casing and drip into the installation environment, which will affect the normal use of the air conditioner. Of course, in heating mode, it is also easy to cause excessive heat to be transferred outward, resulting in reduced energy efficiency.

[0005] Some designs involve covering the surface of the volute facing away from the heat dissipation duct with a layer of insulation material. For example, the insulation material layer can be a thick foam layer. This foam layer blocks the transfer of cold or heat from the volute to the outer casing. However, this design complicates the stacking structure on the volute and increases the cost of the entire air conditioner indoor unit. Summary of the Invention

[0006] The main purpose of this application is to provide an air-conditioning indoor unit, aiming to optimize the design of the structure of the air-conditioning indoor unit to simplify the structure of the air-conditioning indoor unit and reduce its cost.

[0007] In a first aspect, an embodiment of the present application provides an air conditioner indoor unit, comprising a housing, a fan, and a heat exchanger, wherein a heat exchange duct is formed in the housing, the housing comprising a box body and a volute, the volute being disposed within the box body and connected to the box body, the volute defining an upper portion of a duct wall surface of the heat exchange duct; the fan and the heat exchanger being disposed within the heat exchange duct;

[0008] The volute includes an air duct surface and a back surface that are arranged opposite to each other. The air duct surface forms the upper part of the air duct wall of the heat exchange air duct, and an air insulation cavity is formed between the back surface and the inner wall surface of the box body by spacing.

[0009] In one embodiment, the box is formed by enclosing sheet metal parts;

[0010] And / or, the volute is a plastic part.

[0011] In one embodiment, the air conditioner indoor unit further includes a support member, wherein the support member is supported between the back surface of the volute and the inner wall surface of the box body.

[0012] In one embodiment, the support member and the volute are integrally formed;

[0013] Alternatively, the support member is fixed integrally with the box body;

[0014] Alternatively, the support member is a component independent of the volute and the casing.

[0015] In one embodiment, a reinforcement portion is provided at a position where the box body contacts the support member.

[0016] In one embodiment, the volute includes a main body and a connecting portion, the main body includes a first portion, a second portion, and a volute tongue portion connected between the first portion and the second portion, and the wind wheel and the heat exchanger are respectively installed in the first portion and the second portion;

[0017] The connecting portion is connected to an edge of at least one of the first part and the second part and is connected to the box body. The supporting member is provided on the back surface of at least one of the first part and the second part.

[0018] In one embodiment, a fixing portion is further provided on the back side of the volute tongue portion, and a locking portion is further provided on the box body at a position corresponding to the fixing portion, and the fixing portion is fixedly connected to the locking portion.

[0019] In one embodiment, the box body is provided with a convex structure at a position corresponding to the snail tongue portion, the fixing portion is a threaded column protruding from the back side of the snail tongue portion, and the locking portion is a locking hole provided on the convex structure.

[0020] In one embodiment, a step portion is formed on an edge of one side of the first portion away from the second portion, and the box body is connected to a connecting flange extending toward the interior of the box body;

[0021] The side surface of the step portion abuts against the inner wall surface of the box body, and the bottom surface of the step portion abuts against the connecting flange.

[0022] In one embodiment, the connecting portion includes a threaded column provided on the step portion, and the connecting flange is provided with a connecting hole that cooperates with the threaded column;

[0023] Wherein, the connecting flange is further provided with a avoidance groove penetrating in the thickness direction thereof, and the avoidance groove is staggered with the connecting hole.

[0024] In one embodiment, the heat exchange air duct includes an air return port and an air outlet;

[0025] The air insulation cavity is located above the heat exchange duct and extends from the air outlet side of the heat exchanger to the air outlet.

[0026] In one embodiment, the heat exchange air duct includes a return air area between the heat exchanger and the wind wheel and an outlet air area between the wind wheel and the air outlet;

[0027] The air insulation cavity includes a first cavity corresponding to the return air area and a second cavity corresponding to the outlet air area, wherein the volume of the second cavity is greater than the volume of the first cavity.

[0028] In one embodiment, the heat exchanger further comprises a drive motor and a water receiving tray, the water receiving tray being located within the housing, the volute comprising a side surface located on the same side as the air duct surface and the back surface, the drive motor being mounted on the side surface of the volute, the side surface of the volute, the inner wall surface of the housing, the water receiving tray, and the side surface of the heat exchanger further forming a heat dissipation duct, the drive motor being located within the heat dissipation duct;

[0029] Wherein, the heat dissipation duct is communicated with the air insulation cavity.

[0030] In one embodiment, the heat dissipation duct further includes an air inlet and an air outlet, the air inlet is opened on the box body and communicates with the outside, and the air outlet is communicated with the heat exchange duct.

[0031] In one embodiment, it further includes a water receiving tray;

[0032] The water receiving tray is arranged below the volute and connected to the box body, and the heat exchange air duct is arranged between the water receiving tray and the volute;

[0033] The volute is also provided with a water trough structure on the back side, and a drainage hole connecting the water trough structure and the water receiving tray is provided. The liquid on the back side can be gathered in the water trough structure and flow into the water receiving tray through the drainage hole.

[0034] In one embodiment, the volute includes a first part and a second part, the impeller is installed in the first part, and the heat exchanger is connected between the second part and the water receiving pan;

[0035] The water tank structure includes a water tank, which is arranged on the periphery of the back side of the first part, and the drainage hole is provided on the bottom wall of the water tank.

[0036] In one embodiment, the volute further comprises a volute tongue portion connected between the first portion and the second portion;

[0037] The water trough structure further includes a water collecting trough formed on the back side of the volute tongue portion, and the water collecting trough is connected to the water containing trough.

[0038] In one embodiment, the water collecting tank has drainage ports at both ends of the wind wheel in the axial direction, and both drainage ports are connected to the water containing tank.

[0039] In one embodiment, the drainage hole is also provided on the bottom wall of the water collecting trough.

[0040] In one embodiment, the water trough structure further includes a water inlet trough, which is provided on at least one side periphery of the second portion along the axial direction of the wind wheel and is communicated with the water containing trough.

[0041] In one embodiment, the water tank includes a first tank portion, a second tank portion, and a third tank portion that are interconnected. The first tank portion and the second tank portion are arranged at opposite edges of the first portion along the axial direction of the wind wheel, and the third tank portion is arranged at a circumference of the first portion away from the second portion.

[0042] Wherein, the bottom wall of the first trough body part and the bottom wall of the second trough body part are both provided with the drainage hole.

[0043] In one embodiment, downward projections of the drainage holes of the first trough portion and the drainage holes of the second trough portion both fall within the area of ​​the water receiving tray.

[0044] In one embodiment, the device further includes a drive motor connected to the wind rotor; the first portion includes a wind rotor bracket and a motor bracket, and the drive motor is mounted on the motor bracket; the motor bracket is connected to one end of the wind rotor bracket in the axial direction of the wind rotor, and the first slot portion is arranged on a side of the wind rotor bracket away from the motor bracket;

[0045] The wind wheel bracket is also connected to a sealing member, which is connected to the periphery of the back side of the wind wheel bracket away from the motor bracket and is located below the rotating shaft of the wind wheel to enclose the wind wheel bracket to form a part of the first slot body.

[0046] In one embodiment, at least two wind wheels are coaxially arranged in the first part;

[0047] The air-conditioning indoor unit also includes a support structure connected to the first part, the support structure is arranged between two adjacent wind wheels, the support structure includes a support base and a connecting component, the connecting component is installed on the support base and is configured to connect the rotating shafts of two adjacent wind wheels, the support base is connected to the first part and abuts against the heat exchanger.

[0048] In one embodiment, the support structure further includes a buffer member, which is connected to the support seat and abuts against the heat exchanger.

[0049] In one embodiment, the support base comprises:

[0050] a first support member connected to the first portion; and

[0051] The second support member is detachably connected to the first support member and / or the first part. The second support member cooperates with the first support member to form an installation space for installing the connecting component, and the outer wall surface of the second support member abuts against the heat exchanger.

[0052] In a second aspect, the present application also proposes a HVAC device, including the air-conditioning indoor unit as described above.

[0053] The technical solution of the present application forms an air insulation cavity between the back side of the volute facing away from the air duct and the inner wall surface of the box body. The air insulation cavity can block the heat transfer from the volute to the box body during the operation of the air-conditioning indoor unit. In this way, the air-conditioning indoor unit of the present application can achieve a good insulation effect without the need to cover the volute with an insulation material layer as in conventional design solutions. Moreover, through such a setting, the overall structure of the air-conditioning indoor unit is simplified due to the omission of the insulation material layer, and the production cost can be effectively reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0055] FIG1 is a schematic diagram of the three-dimensional structure of an air-conditioning indoor unit according to an embodiment of the present invention;

[0056] FIG2 is a schematic diagram of the exploded structure of the air conditioner indoor unit shown in FIG1 ;

[0057] FIG3 is a schematic diagram of the three-dimensional structure of the air conditioner indoor unit shown in FIG1 from another perspective;

[0058] FIG4 is a schematic cross-sectional view of the air conditioner indoor unit shown in FIG1 ;

[0059] FIG5 is a schematic diagram of a portion of the structure of the air conditioner indoor unit shown in FIG1 with the housing removed;

[0060] FIG6 is a schematic diagram of the exploded structure of the housing and volute in the air conditioner indoor unit shown in FIG1 ;

[0061] FIG7 is a schematic diagram of the exploded structure of the structure shown in FIG5 ;

[0062] FIG8 is a schematic diagram of a volute in the air conditioner indoor unit shown in FIG1 in a top view;

[0063] FIG9 is a schematic diagram of the flow of condensed water on the volute in FIG8 ;

[0064] FIG10 is a schematic diagram of the volute in the air conditioner indoor unit shown in FIG1 when viewed from above;

[0065] FIG11 is a schematic diagram of the assembly of the support base and the volute in the indoor unit of the air conditioner of the present application;

[0066] FIG12 is an enlarged view of point L in FIG11 ;

[0067] FIG13 is a schematic structural diagram of the second support body in FIG12;

[0068] FIG14 is a schematic diagram of the exploded structure of the air conditioner indoor unit shown in FIG1 with the housing removed;

[0069] FIG15 is an enlarged view of point K in FIG14 ;

[0070] FIG16 is a side structural diagram of the air conditioner indoor unit shown in FIG1 ;

[0071] FIG17 is another exploded structural diagram of the air conditioner indoor unit shown in FIG1 ;

[0072] FIG18 is a cross-sectional view along line NN of FIG16 .

[0073] Reference numerals: 1, air conditioner indoor unit; 10, housing; 11, box body; 111, bottom plate; 112, enclosure; 113, fixed side plate; 114, movable side plate; 115. Connecting flange; 116. Reinforcement; 117. Convex structure; 118. Locking part; 119. Avoidance groove; 12. Connecting ear; 20. Volute; 21. Air duct surface; 22. Back surface; 23. Sink structure; 231. Water storage tank; 232. First tank body; 233. Second tank body; 234. Third tank body; 235. Water collecting tank; 2351. Drain outlet; 236. Drain recess; 237. Water guide trough; 238. Drain hole; 24. First part; 241. Wind wheel bracket; 242. Motor bracket; 243. Mounting part; 244. Fixing bracket; 245. Connecting part; 25. Second part; 251. Slot; 26. Volute tongue; 2 61. Fixing part; 27. Support member; 28. Step part; 29. ​​Side of volute; 30. Water collecting tray; 31. Main body; 32. Edge; 33. Avoidance port; 40. Drive motor; 50. Wind wheel; 60. Heat exchanger; 70. Support structure; 71. Support seat; 711. First support body; 712. Second support body; 713. Drainage channel; 72. Connecting assembly; 73. Buffer member; 80. Sealing member; a. Heat exchange duct; a1. Return air port; a2. Air outlet; a3. Return air area; a4. Air outlet area; b. Heat dissipation duct; b1. Air inlet; b2. Air outlet; c. Air insulation cavity; c1. First cavity; c2. Second cavity; Q. Heat dissipation flow path. DETAILED DESCRIPTION

[0074] In order to make the purpose, technical solutions and advantages of this application clearer, the following part will further describe the embodiments of this application in detail with reference to the accompanying drawings.

[0075] When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers 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. Instead, they are merely examples of devices and methods consistent with some aspects of the present application, as detailed in the appended claims.

[0076] In the description of this application, it should be understood that the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances. In addition, in the description of this application, unless otherwise specified, "multiple" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the previous and subsequent associated objects are in an "or" relationship.

[0077] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs. The terms used in this specification are for the purpose of describing specific embodiments only and are not intended to limit this application. The term "and / or" as used herein includes any and all combinations of one or more of the relevant listed items.

[0078] HVAC equipment includes one-to-many central air conditioners, heat pump air conditioners and other equipment. Among them, the central air conditioner includes an outdoor unit and multiple air conditioner indoor units that form a refrigerant circulation with the outdoor unit, while the heat pump air conditioner usually includes a refrigerant circulation, a cooling water circulation and a chilled water circulation. The chilled water circulation structure of the heat pump air conditioner includes an air conditioner indoor unit. The above air conditioner indoor units are installed in the indoor environment and can be used to adjust the temperature and humidity of the indoor environment.

[0079] The basic structure of an air conditioner indoor unit includes components such as a volute, a water pan, a heat exchanger, a drive motor, and a wind rotor. A heat exchange duct is located between the volute and the water pan, and both the wind rotor and heat exchanger are located within the duct. The volute is a key component of the duct. Driven by the motor, the wind rotor rotates, creating a negative pressure within the duct, drawing external air into the duct. During this process, the airflow exchanges heat with the heat exchanger, thereby achieving temperature and humidity regulation. It is understandable that the heat exchange medium flowing through the heat exchanger in the air conditioner indoor unit varies in different types of HVAC equipment. For example, in the indoor unit of a central air conditioner, the heat exchange medium flowing through the heat exchanger is refrigerant, while in the air conditioner indoor unit of a heat pump air conditioner, the heat exchange medium flowing through the heat exchanger is chilled water.

[0080] When the indoor unit of the air conditioner is in cooling mode, the volute is in direct contact with the cooled cold air, so the temperature of the volute itself is relatively low. The cold air after cooling can be dissipated outward through the volute and the outer casing in turn. On the one hand, this will lead to reduced energy efficiency. On the other hand, condensation water will form on the outer casing and drip into the installation environment, which will affect the normal use of the air conditioner. Of course, in heating mode, it is also easy to cause excessive heat to be transferred outward, resulting in reduced energy efficiency.

[0081] Some designs involve covering the surface of the volute facing away from the heat dissipation duct with a layer of insulation material. For example, the insulation material layer can be a thick foam layer. This foam layer blocks the transfer of cold or heat from the volute to the outer casing. However, this design complicates the stacking structure on the volute and increases the cost of the entire air conditioner indoor unit.

[0082] Therefore, the present application proposes an air-conditioning indoor unit, the structure of which is more optimized than the design of a conventional air-conditioning indoor unit, the overall structure is simpler, and the production cost is relatively lower.

[0083] Please refer to Figures 1 to 4. Figure 1 is a schematic diagram of the overall structure of the air conditioner indoor unit 1. Figure 2 is a schematic diagram of the exploded structure of the air conditioner indoor unit 1. Figure 3 is a schematic diagram of the three-dimensional structure of the air conditioner indoor unit 1 from another perspective. Figure 4 is a schematic cross-sectional view of the air conditioner indoor unit 1 shown in Figure 1. In this embodiment, the air conditioner indoor unit 1 includes a housing 10, a heat exchanger 60, a drive motor 40, and a wind wheel 50.

[0084] The housing 10 includes a casing 11 and a volute 20. In one embodiment, the casing 10 may also include a water tray 30. The casing 11 is used to protect and support the volute 20, water tray 30, and other components within it, and also serves as the exterior appearance of the entire unit. In one embodiment, the casing 11 includes a bottom plate 111 and a surrounding plate 112 connected to the periphery of the bottom plate 111. The bottom plate 111 and the surrounding plate 112 cooperate to form a structure with one side open, so that the volute 20, water tray 30, heat exchanger 60, drive motor 40, and impeller 50 can be accommodated in the casing 11 and protected by the casing 11. The air conditioner indoor unit 1 of the present application can be installed on a ceiling in an indoor environment. To adapt to its installation environment, the entire air conditioner indoor unit 1 can have a relatively flat three-dimensional structure. That is, the casing 11 can have a flat cubic shape, wherein the casing 11 can be in the shape of a rectangular parallelepiped, a disc, or the like.

[0085] The housing 11 exemplarily shown in Figures 1 to 3 is in the form of a flat rectangular parallelepiped. In the coordinate system shown in Figure 1 , the XX direction is the front-to-back direction of the air-conditioning indoor unit 1, the YY direction is the length direction of the air-conditioning indoor unit 1, and the ZZ direction is the thickness direction of the air-conditioning indoor unit 1. In one embodiment, the enclosure 112 includes a fixed side panel 113 and a movable side panel 114, wherein two fixed side panels 113 are provided and are respectively connected to opposite sides of the bottom plate 111. Specifically, the two fixed side panels 113 are connected to opposite sides of the bottom plate 111 along the XX direction, wherein the fixed side panels 113 and the bottom plate 111 form an integral structure. That is, the fixed side panels 113 and the bottom plate 111 can be made from a single piece of sheet metal using processes such as cutting, stamping, and bending. Of course, the fixed side panels 113 and the bottom plate 111 can also be fixed together by welding. Two movable side panels 114 are also provided. The two movable side panels 114 are disposed between the two fixed side panels 113 and are located on opposite sides of the bottom panel 111. Specifically, the two movable side panels 114 are connected to opposite sides of the bottom panel 111 along the YY direction. In this way, the bottom panel 111, the fixed side panels 113, and the movable side panels 114 enclose a configuration in which one side of the box body 11 is open. The fixed side panels 113 and the bottom panel 111 are both bent to form a skirt on the side where they connect to the movable side panels 114. The movable side panels 114 are assembled on the inner side of the skirt and are detachably fixed to the bottom panel 111 and the fixed side panels 113, for example, by screws.

[0086] The air conditioner indoor unit 1 can be hoisted from a ceiling. Specifically, the air conditioner indoor unit 1 further includes a plurality of connecting ears 12, which are fixedly connected to the housing 11. Thus, the entire air conditioner indoor unit 1 can be hoisted from a ceiling by means of a suspension rod that cooperates with the connecting ears 12. In the present application, the housing 11 is formed by enclosing sheet metal parts, such as iron alloy or aluminum alloy plates. This provides the housing 11 with a high structural strength, better protecting the internal structure after hoisting, and preventing deformation of the housing 11 itself.

[0087] In order to achieve a stable connection between the connecting ear 12 and the box body 11, in one implementation, the connecting ear 12 is constructed into a multi-fold plate structure, part of the structure of the connecting ear 12 is located inside the box body 11, and abuts against the inner wall surface of the bottom plate 111 and is clamped by the movable side plate 114 and the bottom plate 111, and the part of the connecting ear 12 located outside the box body 11 is fixedly connected to the movable side plate 114. Among them, a matching structure of positioning grooves and positioning protrusions can be formed between the part of the connecting ear 12 located in the box body 11 and the bottom plate 111, or the part of the connecting ear 12 located in the box body 11 and the bottom plate 111 can be locked by screws. In this way, the connecting ear 12 will not easily shake after it abuts against the bottom plate 111, and the connecting ear 12 and the movable side panel 114 can be further fixed by screws, bolts, rivets and other connecting parts. In this way, through multiple fixations, the connection between the connecting ear 12 and the box body 11 is more stable. Moreover, after the air-conditioning indoor unit 1 is hoisted, the connecting ear 12 is connected in the above way. Since the movable side panel 114 is limited by the fixed side panel 113 and the skirt on the bottom plate 111 on all sides, it can effectively prevent the movable side panel 114 from being separated from the box body 11 or deformed due to being pulled by the connecting ear 12.

[0088] In one embodiment, the housing 10 may further include a panel (not shown). In the exemplary arrangement shown in the figure, the panel is connected to the lower portion of the housing 11 and covers the open portion of the housing 11. The water tray 30 and the volute 20 are disposed within the space enclosed by the housing 11 and the panel. After the air conditioner indoor unit 1 is mounted on the ceiling, the panel may be positioned nearly flush with the ceiling, and the panel may just cover the mounting opening on the ceiling. Alternatively, the entire air conditioner indoor unit 1 may be sunken relative to the ceiling, so that the housing 11 is also partially exposed from the mounting opening on the ceiling.

[0089] The volute 20 of the present application can be fixedly connected to the housing 11, and the specific fixed connection forms include but are not limited to screw connection, welding, bonding, etc. The water receiving tray 30 can be detachably connected to the housing 11, and the detachable connection methods include screw connection, sliding connection, etc.

[0090] Please refer to Figure 5. In one embodiment, the volute 20 can be fixedly connected to the box body 11 at its edge. Specifically, a connecting portion 245 is provided at the edge of the volute 20. The connecting portion 245 can be provided on at least one side of the volute 20 along the XX direction in the figure and connected to the box body 11 through the connecting portion 245.

[0091] Please refer to Figures 1 to 5. In the assembled state, a heat exchange duct a is formed in the shell 10. Specifically, the volute 20 defines the upper part of the duct wall of the heat exchange duct a; the wind wheel 50 and the heat exchanger 60 are arranged in the heat exchange duct a; wherein the volute 20 includes a duct surface 21 and a back surface 22 arranged opposite to each other, and the duct surface 21 forms the upper part of the duct wall of the heat exchange duct a. Furthermore, the present application forms an air insulation cavity c between the back surface 22 and the inner wall of the box body 11 by means of a spacing.

[0092] Therefore, the technical solution of the present application forms an air insulation cavity c between the back side 22 of the volute 20 facing away from the air duct and the inner wall surface of the box body 11. The air insulation cavity c can block the heat transfer between the volute 20 and the box body 11 during the operation of the air-conditioning indoor unit. In this way, the air-conditioning indoor unit of the present application can achieve a better insulation effect without the need to cover the volute 20 with an insulation material layer as in the conventional design scheme. Moreover, through such a setting, since the setting of the insulation material layer is omitted, the overall structure of the air-conditioning indoor unit is simplified and the production cost can be effectively reduced.

[0093] Further, please refer to Figure 4 again. The heat exchange duct a includes a return air port a1 and an air outlet a2; the air insulation chamber c is located above the heat exchange duct a and extends from the air outlet side of the heat exchanger 60 to the air outlet a2. During the operation of the air conditioner, for example in cooling mode, the air in the heat exchange duct a cools down after undergoing heat exchange in the heat exchanger 60. Driven by the wind wheel 50, the airflow acts on the duct surface 21 of the volute 20 in the area from the air outlet side of the heat exchanger 60 to the air outlet a2. There is a certain static pressure. This area is an area where heat exchange is more intense. In conventional designs, at least a thicker insulation structure is required to be covered on the back side 22 of the volute 20. However, the present application effectively reduces the amount of cold or heat dissipated outward from this area by covering the air insulation chamber c in the area from the air outlet side of the heat exchanger 60 to the air outlet a2, thereby ensuring the insulation effect and making the overall structure more compact.

[0094] Furthermore, the heat exchange duct a includes a return air area a3 located between the heat exchanger 60 and the impeller 50, and an outlet air area a4 located between the impeller 5 and the outlet a2. The air insulation chamber c includes a first cavity c1 corresponding to the return air area a3 and a second cavity c2 corresponding to the outlet air area a4, wherein the volume of the second cavity c2 is greater than that of the first cavity c1. In this embodiment, the second cavity c2 corresponds to the outlet side of the impeller 50. Therefore, the airflow within the heat exchange duct a exerts a greater static pressure on the volute 20 in the outlet air area a4, where heat exchange is more intense. Therefore, the present application designs the volume of the second cavity c2 to be greater than that of the first cavity c1. While meeting the insulation requirements, it can also make the overall volume of the air conditioner indoor unit more compact.

[0095] Specifically, the volute 20 includes a first portion 24 , a second portion 25 , and a volute tongue portion 26 connected between the first portion 24 and the second portion 25 . The wind wheel 50 and the heat exchanger 60 are installed in the first portion 24 and the second portion 25 , respectively.

[0096] The volute 20 of the present application is a thin-walled structure as a whole, which can be made of plastic material and produced by one-piece injection molding. Through such a setting, the volute 20 has the advantages of being light in weight, easy to produce, and having strong thermal insulation performance. Among them, the volute tongue 26 is formed by the thin-walled structure of the volute 20 located between the first part 24 and the second part 25, which is recessed toward the water receiving tray 30. It can be understood that the setting of the volute tongue 26 can make the flow field in the heat exchange duct a more in line with the aerodynamic characteristics, thereby reducing the noise generated during the flow of air in the heat exchange duct a, reducing the air flow backflow phenomenon, and thus improving energy efficiency.

[0097] At least one of the first portion 24 and the second portion 25 is provided with a connecting portion 245 at an edge along the XX direction in the figure, and is connected to the housing 11 via the connecting portion 245. Preferably, the edges of both the first portion 24 and the second portion 25 can be provided with connecting portions 245, so that the connection structure between the volute 20 and the housing 11 is more secure.

[0098] In one embodiment, the air conditioning indoor unit 1 further includes a support member 27, which is supported between the back surface 22 of the volute 20 and the inner wall surface of the housing 11. Specifically, the support member 27 is supported between the back surface 22 of the volute 20 and the inner wall surface of the bottom plate 111 of the housing 11. By providing the support member 27 in this embodiment, when the volute 20 is fixed to the housing 11, the support member 27 can effectively prevent the housing 11 from experiencing concavity or collapse, such as at the bottom plate 111. This also ensures that the air insulation chamber c maintains the required height dimension in the vertical direction, thereby ensuring its insulation effect.

[0099] Furthermore, the present application may further provide a support member 27 on the back surface 22 of the first portion 24, or provide a support member 27 on the back surface 22 of the second portion 25, or provide a support member 27 on both the first portion 24 and the second portion 25. In the exemplary embodiment shown in the figure, the first portion 24 and the second portion 25 are provided with a support member 27 at the same time, wherein the support member 27 may be integrally formed with the volute 20, or the support member 27 is fixed to the housing 11 as a whole, for example, the support member 27 is fixed to the bottom plate 111 of the housing 11 by stamping, welding, etc. In addition, the support member 27 may also be a part independent of the volute 20 and the housing 11.

[0100] When the support member 27 is integrally formed with the volute 20 or the housing 11, the support member 27 may be a block-shaped structure. For example, as shown in the figure, multiple support members 27 are spaced apart in the YY direction along the back surface 22 of the volute 20. This ensures the support effect while reducing material usage and lowering costs. When the support member 27 is a separate component, the support block may be made of a heat-insulating material, such as a block of foam or sponge.

[0101] The use of the support member 27 can effectively prevent the box body 11 from collapsing inward. At this time, the support member 27 exerts a force on the bottom plate 111 of the box body 11. In this case, the box body 11, which is in the form of a sheet metal part, may also deform outward. Therefore, in order to improve the structural strength of the box body 11, a reinforcement portion 116 is provided at the position where the box body 11 contacts the support member 27. In one structural form, the reinforcement portion 116 can be formed by stamping the bottom plate 111 of the box body 11. Specifically, the reinforcement portion 116 can include a plurality of grooves spaced apart in the XX direction, and each groove extends in the YY direction to match a plurality of support members 27 spaced apart in the YY direction. It can be understood that the provision of the reinforcement portion 116 can prevent the part from being deformed due to the external force of the support member 27, and the reinforcement portion 116 is in the form of a groove, so there is no need to set up other parts, and the production cost is low.

[0102] It is understandable that the reinforcement portion 116 may also be in other forms, such as ribs, bumps, etc., and this application does not limit this.

[0103] As mentioned above, the volute 20 can be connected to the housing 11 by providing connecting portions 245 on the edges of both the first portion 24 and the second portion 25. In order to achieve a more stable connection structure between the volute 20 and the housing 11, a fixing portion 261 is also provided on the back side 22 of the volute tongue portion 26. The housing 11 is also provided with a locking portion 118 at a position corresponding to the fixing portion 261. The fixing portion 261 is fixedly connected to the locking portion 118. Since the volute tongue portion 26 is located between the first portion 24 and the second portion 25, the cooperation between the fixing portion 261 and the locking portion 118 can fix the volute tongue portion 26 at three locations: on both sides and in the middle, thus making the connection structure more secure.

[0104] In one embodiment, a convex structure 117 is provided on the housing 11 at a position corresponding to the volute tongue portion 26. The fixing portion 261 is a threaded post protruding from the back surface 22 of the volute tongue portion 26, and the locking portion 118 is a locking hole provided in the convex structure 117. Specifically, the convex structure 117 can be formed by stamping a portion of the bottom plate 111 inward. After assembly, the convex structure 117 extends toward the volute 20. The placement of the locking portion 118 on the convex structure 117 also ensures that the housing 11 is less likely to deform at this location when the volute 20 is connected to the housing 11.

[0105] It should be emphasized here that the fixing portion 261 in the above content is in the form of a threaded column, which produces a similar effect to the support member 27, thereby further ensuring the stability of the shape of the air insulation cavity c.

[0106] In this application, the impeller 50 and heat exchanger 60 are arranged in intervals from the return air inlet a1 to the air outlet a2, meaning that the impeller 50 is located upstream in the direction of the airflow. As shown in the figure, the impeller 50 is arranged below the first portion 24, corresponding to the air outlet a2. This means that the airflow first passes through the heat exchanger 60 and is then driven by the impeller 50 to be discharged through the air outlet a2 on the panel. Therefore, the airflow pressure at the first portion 24 is relatively high. To prevent the airflow from entering the air insulation cavity c through the gap between the volute 20 and the housing 11 at this location, a step 28 is formed on the edge of the first portion 24 away from the second portion 25. The housing 11 is connected to a connecting flange 115 extending toward the interior of the housing 11. The side surface of the step 28 abuts the inner wall of the housing 11, and the bottom surface of the step 28 abuts the connecting flange 115. The connecting portion 245 is provided on the step 28. The formation of the step portion 28 in this embodiment allows the volute 20 to form two sealing surfaces between the box body 11 and the position corresponding to the air outlet a2. The two sealing surfaces are at an angle. In this way, the air at the air outlet position can be reduced from entering the air insulation cavity c through the gap between the volute 20 and the box body 11, thereby reducing air volume loss and improving energy efficiency.

[0107] Furthermore, referring to Figures 3 to 6, the connection portion 245 includes a threaded post provided on the step portion 28, and the connection flange 115 is provided with a connection hole 1151 that cooperates with the threaded post; wherein the connection flange 115 is also provided with a avoidance groove 119 that penetrates in the thickness direction thereof, and the avoidance groove 119 is staggered with the connection hole 1151. wherein, the inner surface of the panel is provided with a sealing ring surrounding the periphery of the air outlet, and the sealing ring can be made of a material such as sponge, silicone, or foam. After the panel is installed on the housing 11, the sealing ring on the panel of the present application can align the connection flange 115 in the vertical direction, and the avoidance groove 119 is provided on the connection flange 115, so that part of the material of the sealing ring can pass through the avoidance groove 119 to form a sealing contact with the bottom surface of the step portion 28 on the volute 20. In this way, the sealing ring can better block the gap between the volute 20 and the housing 11, thereby effectively preventing the air volume from the air outlet from entering the air insulation cavity c through the gap.

[0108] In one embodiment, referring to Figures 5, 7 to 9, the volute 20 is further provided with a water trough structure 23 on the back side 22, and a drainage hole 238 connecting the water trough structure 23 and the water receiving pan 30 is provided. When the air-conditioning indoor unit 1 is operating in the cooling mode, the liquid on the back side 22 can gather in the water trough structure 23 and flow into the water receiving pan 30 through the drainage hole 238.

[0109] It is understandable that the present application can greatly reduce the heat transfer from the volute 20 to the box body 11 and meet the insulation requirements by setting up the air insulation cavity c while omitting the structure of the insulation layer. However, since the volute 20 is in direct contact with the air flow in the heat exchange duct a, in the cooling mode, the volute 20 may also condense on the back 22 due to the low temperature of the volute 20 itself. It should be noted that this part of the condensation is a small amount of condensed water on the back 22 of the volute 20, and the air insulation cavity c is to block the heat transfer from the back 22 to the box body 11. These two aspects do not conflict, because even if the existing solution sets an insulation layer on the back 22, the temperature of the back 22 is still low in the cooling mode. Thus, the water trough structure 23 of this embodiment is used to collect condensed water generated on the back side 22 of the volute 20, preventing the condensed water from directly overflowing the volute 20 and flowing around inside the air conditioner indoor unit 1, thereby threatening the performance of other components within the air conditioner indoor unit 1 or dripping into the installation environment of the air conditioner indoor unit 1. This improves the stability and comfort of the air conditioner indoor unit 1 during use. The present application further provides a drain hole 238 on the volute 20, which is connected to the water receiving pan 30. Since the water receiving pan 30 is located below the volute 20, the drain hole 238 can be projected downwardly within the area of ​​the water receiving pan 30. In this way, the condensed water flowing out of the drain hole 238 can directly drip into the water receiving pan 30 due to gravity. Of course, the downward projection of the drain hole 238 does not need to be located within the area of ​​the water receiving pan 30. In this case, a drain pipe connected to the drain hole 238 can be designed to connect the drain hole 238 and the water receiving pan 30.

[0110] The water tank structure 23 includes a water tank 231 disposed around the periphery of the back surface 22 of the first portion 24, and a drainage hole 238 disposed on the bottom wall of the water tank 231. It will be appreciated that in cooling mode, most of the condensed water generated by the heat exchanger 60 can flow along its structure and into the water receiving pan 30. The heat exchanger 60 structurally includes side plates and heat exchange tubes, which are disposed through the side plates and connected to the refrigerant inlet and outlet pipes. After assembly, the edge of the second part 25 is pressed against the side plate of the heat exchanger 60 to ensure the sealing of the heat exchange duct a, and the refrigerant inlet and outlet pipes connected to the heat exchanger 60 must extend out of the downward range of the second part 25 along the axial direction of the wind wheel 50. In order to receive the condensed water generated by the refrigerant inlet and outlet pipe parts and the bent pipe parts of the heat exchange pipes extending out of the side plate, the axial size of the water receiving tray 30 of the wind wheel 50 must be larger than the axial size of the volute 20. That is, in this application, when the volute 20 is not provided with the insulation structure of the conventional air-conditioning indoor unit 1, the condensed water generated by the second part 25 on the back side 22 can be received by the water receiving tray 30 located below the heat exchanger 60 even if it overflows to the outside of the volute 20.

[0111] The water collecting pan 30 is formed with an escape area directly below the wind wheel 50. The side of the first part 24 away from the second part 25 will extend to the outside of the escape area of ​​the water collecting pan 30. If the condensed water generated on the back side 22 of the first part 24 overflows beyond the range of the volute 20, it will be difficult to be received by the water collecting pan 30 in the case of free fall, and this part of the condensed water will affect the operation of the machine.

[0112] To this end, the water trough structure 23 includes a water trough 231, which is arranged on the periphery of the back side 22 of the first portion 24, and a drainage hole 238 is provided on the bottom wall of the water trough 231. Regarding the formation of the water trough 231, the solution of the present application can be to integrally form a blocking edge extending upward on the periphery of the back side 22 of the first portion 24 during the molding process of the volute 20. The blocking edge cooperates with the structure of the first portion 24 to enclose the water trough 231. It is understandable that the blocking edge can also be fixed to the edge of the back side 22 of the first portion 24 after the volute 20 is manufactured, for example, by welding, gluing, etc.

[0113] In this way, in the case of condensed water generated on the back side 22 of the first part 24, when the condensed water flows downward due to gravity, it is blocked by the blocking edge when it flows to the edge area of ​​the first part 24, and then flows along the water tank 231, and finally discharged into the water receiving tray 30 through the drainage hole 238, thereby effectively preventing the condensed water from overflowing the volute 20 and affecting the normal operation of the air-conditioning indoor unit 1.

[0114] At the same time, the water storage tank 231 of this embodiment is arranged around the periphery of the back side 22 of the first part 24. Therefore, when the condensed water generated on the back side 22 of the first part 24 flows in multiple directions, it can be effectively collected by the water storage tank 231 and discharged into the water receiving tank.

[0115] In one embodiment, the water tank 231 includes a first tank portion 232, a second tank portion 233, and a third tank portion 234. The first tank portion 232 and the second tank portion 233 are arranged on opposite sides of the first portion 24 along the axial direction of the wind wheel 50, and the third tank portion 234 is arranged on the edge of the first portion 24 away from the second portion 25. Drain holes 238 are provided on the bottom walls of both the first tank portion 232 and the second tank portion 233.

[0116] In this embodiment, drainage holes 238 are provided on the bottom wall of the first groove body portion 232 and the bottom wall of the second groove body portion 233, which can accelerate the discharge of condensed water in the water tank 231, thereby avoiding overflow of the water tank 231 when the amount of condensed water generated is large, thereby further ensuring the safe operation of the air-conditioning indoor unit 1.

[0117] The present application further provides a portion of the water receiving pan 30 directly below the drainage holes 238 of the first trough portion 232 and the drainage holes 238 of the second trough portion 233. This arrangement allows the condensed water discharged from the drainage holes 238 at both locations to fall directly into the water receiving pan 30 by gravity, thereby eliminating the need for pipe connections and other structures, thereby simplifying the structure.

[0118] 7 to 9 , the water trough structure 23 further includes a water collecting trough 235 formed on the back side 22 of the volute tongue portion 26 . The water collecting trough 235 is connected to the water containing trough 231 . The volute tongue portion 26 is formed by a thin-walled structure between the first portion 24 and the second portion 25 of the volute 20, which is recessed toward the water receiving pan 30. As a result, a water collecting groove 235 is formed on the back side 22 of the volute tongue portion 26 due to the recess. In this application, the water collecting groove 235 is connected to the water receiving tank 231. On the one hand, the condensed water in the water collecting groove 235 can be quickly discharged, thereby preventing the condensed water there from being retained for a long time and breeding bacteria, thereby affecting the air quality discharged by the air conditioner indoor unit 1. On the other hand, since the water collecting groove 235 is arranged above the water receiving tank 231, when the condensed water flows toward the water receiving tank 231, it can first be intercepted and diverted by the water collecting groove 235, and then flow into the water receiving tank 231. In this process, at least the condensed water generated at the highest point of the first portion 24 is changed in direction when flowing downward, thereby reducing the energy of the condensed water directly impacting the water receiving tank 231 and reducing the risk of the condensed water splashing out of the water receiving tank 231.

[0119] To expedite the drainage of condensed water from the sump 235, the sump 235 has drain ports 2351 at both ends along the YY direction, and both drain ports 2351 are connected to the water tank 231. That is, the drain port on one side is connected to the first tank body 232, and the drain port on the other side is connected to the second tank body 233. This arrangement allows condensed water from the sump 235 to be rapidly drained from both directions without causing stagnation. It is understood that, if drainage requirements are met, the present application may also include a drain port at one end of the sump 235.

[0120] Since the present application omits the conventional design of providing an insulation layer on the back 22 of the volute 20, condensation water will also form on the back 22 of the second portion 25. As we know from the above, the condensation water on the second portion 25 can overflow into the water receiving tray 30 located below it. In addition, in the case where the volute tongue 26 is formed with a water collecting groove 235, it is also possible to consider draining at least a portion of the condensation water generated on the back 22 of the second portion 25 from the water collecting groove 235 to the water receiving tray 30. This can reduce the risk of condensation water directly overflowing from the second portion 25 and splashing onto the pipes or electronic components located below the two sides of the second portion 25. Specifically, referring to Figures 7 to 9, the present application can form a water diversion groove 237 on the back 22 of the second portion 25, extending from top to bottom toward the water collecting groove 235. The water diversion groove 237 is arranged on at least one side of the periphery of the second portion 25 along the YY direction, and the lower end of the water diversion groove 237 is connected to the water storage tank 231. That is, as indicated by the arrow flow direction in Figure 9, the present application can drain the condensed water formed on the back side 22 of the second part 25 through the cooperation of the water diversion groove 237 and the water collecting groove 235, and discharge it into the water containing groove 231 in an orderly manner, thereby improving the stability of the air-conditioning indoor unit 1 during operation.

[0121] It can be understood that the number of water diversion grooves 237 can be set to 1 or 2. The water diversion grooves 237 can be formed by the depression of the shell wall structure of the second part 25, or can be formed by the partition provided on the back side 22 of the second part 25. In order to improve the diversion effect of the condensed water on the second part 25, the present application can be that water diversion grooves 237 are provided on both sides of the back side 22 of the second part 25 along the axial direction of the wind wheel 50, wherein one water diversion groove 237 is connected to the first trough body portion 232, and the other water diversion groove 237 is connected to the second trough body portion 233.

[0122] From the above content, we know that the sump 235 will be able to collect part of the condensed water generated on the back side 22 of the volute 20 and the back side 22 of the second part 25. In order to further improve the discharge efficiency of the condensed water in the sump 235, please refer to Figure 10. In some embodiments, a drainage hole 238 can also be provided on the bottom wall of the sump 235. As mentioned above, the water receiving tray 30 of the present application extends to one side of the air outlet, that is, at least part of it is located directly below the wind wheel 50. Therefore, the downward projection of the volute tongue 26 located between the first part 24 and the second part 25 also falls within the area of ​​the water receiving tray 30. Therefore, the drainage hole 238 provided on the bottom wall of the sump 235 can discharge the condensed water directly into the water receiving tray 30 in the form of free fall, which greatly speeds up the discharge efficiency of the condensed water in the sump 235 and avoids the phenomenon of stagnation.

[0123] In order to make the air-conditioning indoor unit 1 have a larger output power, the heat exchange duct a has a larger extension dimension in the YY direction, and the dimension of the wind wheel 50 in the YY direction is adapted to the heat exchange duct a. In the case where there is one wind wheel 50, due to the excessive size of the wind wheel 50 in the axial direction, it is easy to deform during long-term operation. Therefore, in order to meet the high-power output requirements and ensure structural stability, there are at least two wind wheels 50 coaxially arranged in the first part 24. Please refer to Figure 11. The air-conditioning indoor unit 1 also includes a support structure 70 connected to the first part 24. The support structure 70 is arranged between two adjacent wind wheels 50. The support structure 70 includes a support seat 71 and a connecting assembly 72. The connecting assembly 72 is installed on the support seat 71 and is used to connect the rotating shafts of the two adjacent wind wheels 50.

[0124] Referring to Figures 12 and 13 , there are two wind wheels 50 shown in the figures, and a support base 71 supports the rotating shafts of the two wind wheels 50. Furthermore, the present application further provides a drainage channel 713 in the support base that communicates with the drainage hole 238 provided on the bottom wall of the water collecting trough 235, and the water flows to the water receiving pan 30 through the drainage channel 713. Thus, the formation of the drainage channel 713 in the support base 71 facilitates the drainage of condensed water from the water collecting trough 235 from the drainage channel 713 to the water receiving pan 30, minimizing the amount of condensed water dripping onto the wind wheel 50 during the process of draining the condensed water from the water collecting trough 235 from the drainage channel 713 to the water receiving pan 30, thereby minimizing the possibility of condensed water splashing onto the air duct surface 21 during the rotation of the wind wheel 50. This also reduces the possibility of condensed water dripping from the return air vent or the air outlet along the air duct surface 21 into the internal installation environment of the air conditioner indoor unit 1.

[0125] The connection assembly 72 includes a bearing and a bearing seat. The support seat 71 is provided with a mounting space for the connection assembly 72, and the bearing seat is fixed within the mounting space. The bearing can be a rolling bearing, with the outer ring of the bearing fixed to the bearing seat and the inner ring fixed to the rotating shaft of the wind rotor 50. Alternatively, the bearing can be a sliding bearing, in which case the bearing and the bearing seat are relatively fixed and slide in engagement with the rotating shaft of the wind rotor 50. In the above description, the drainage channel 713 formed in the support seat 71 is relatively isolated from the mounting space.

[0126] In order to facilitate the assembly of the connection component 72, the support base 71 of this embodiment includes a first support body 711 and a second support body 712. The first support body 711 is connected to the first part 24, and the second support body 712 is detachably connected to the first support body 711, or the second support body 712 is also detachably connected to the first part 24, or the two sides of the second support body 712 are detachably connected to the first support member and the first part 24 respectively. The specific detachable connection method includes but is not limited to screw connection, snap connection, etc. After assembly, the first support body 711 and the second support body 712 cooperate to form the above-mentioned installation space. In this way, the first support body 711 and the second support body 712 are separately set, and the second support body 712 is detachably designed, so that the assembly operation of the connection component 72 and the rotating shafts of the two wind wheels 50 is more convenient.

[0127] Referring to Figures 7 to 10 , as well as Figures 12 and 13 , the first support body 711 of the present application can be integrally formed with the first portion 24 , making assembly easier. Furthermore, the drainage channel 713 in the support seat 71 can be formed solely by the first support body 711 , by the second support body 712 , or by the first and second support bodies 711 and 712 working together. In one embodiment, a drainage recess 236 is formed on the tongue portion 26 , which is recessed from the back surface 22 toward the interior of the first support body 711 . This drainage recess 236 can also be understood as being formed by further recessing the bottom wall of the water collecting trough 235 . The drainage hole 238 provided on the water collecting trough 235 is formed on the bottom wall of the drainage recess 236 . This means that the drainage hole 238 and the drainage recess 236 are provided on the first support body 711 , while the drainage channel 713 is formed on the second support body 712 . Through the above arrangement, the first support body 711 is integrally formed with the volute 20 and forms a drainage recess 236, which reduces the material consumption. In this application, the drainage hole 238 is provided at the location of the first support body 711, and the drainage channel 713 is formed in the first support body 711, thereby effectively preventing the condensed water from being retained at the location corresponding to the first support body 711. Of course, the structure of the drainage recess 236 formed at the location of the first support body 711 allows the entire water collection tank 235 to discharge from the end drainage port into the water receiving tank 231. In addition, a drainage path can be further added in the middle of the water collection tank 235, and the water can be directly discharged into the water receiving tray 30. In other words, this part of the design has the advantage of reducing the material consumption by hollowing out the first support body 711, and can also accelerate the efficiency of condensed water discharge in the water collection tank 235, thus providing multiple advantages.

[0128] The support seat 71 of the present application is further in contact with the heat exchanger 60 on the premise of realizing the installation of the connecting component 72. Specifically, the second support body 712 is in contact with the heat exchanger 60. Through such an arrangement, the heat exchanger 60 matches the size of the heat exchange duct a in the YY direction. In the case of a larger size, the heat exchanger 60 is supported by the support seat 71, thereby avoiding the heat exchanger 60 from being deformed by stress concentration in the middle position due to factors such as vibration due to a large span.

[0129] Referring to Figure 13 , when the second support body 712 is supported on the heat exchanger 60, the drainage channel 713 can be formed separately in the second support body 712. The condensed water in the sump 235 can then be discharged onto the heat exchanger 60 through the drainage recess 236, the drainage hole 238, and the drainage channel 713 in sequence. The condensed water can then be further discharged into the water receiving pan 30 through the drainage of the heat exchanger 60. In other words, the outlet of the drainage channel 713 of the present application can be provided on the surface of the second support body 712 that contacts the heat exchanger 60. It is understood that in other configurations, the outlet of the drainage channel 713 can also be provided on the surface of the second support body 712 that does not contact the heat exchanger 60.

[0130] Furthermore, in order to avoid a strong collision of the second support body 712 in the process of supporting the heat exchanger 60, the present application can further install a buffer 73 on the surface of the support base 71 in contact with the heat exchanger 60, that is, when the second support body 712 supports the heat exchanger 60, the buffer 73 is installed on the second support body 712. The buffer 73 can be made of materials such as sponge and silicone. The buffer 73 can effectively protect the structure of the heat exchanger 60. On this basis, when the outlet of the drainage channel 713 is located on the surface where the second support body 712 contacts the heat exchanger 60, in order to prevent the buffer 73 from blocking the discharge process of the condensed water, a avoidance hole can be further formed on the buffer 73 that passes through its two surfaces, and the avoidance hole is connected to the outlet of the drainage channel 713.

[0131] From the above, we can understand that the support structure 70 achieves multiple effects, including securing the heat exchanger 60 and providing drainage and diversion. It should also be emphasized that by supporting the heat exchanger 60 through the support structure 70, the heat exchanger 60 also supports the support structure 70 in reverse. In this way, the heat exchanger 60 bears the weight of the connecting assembly 72 (bearing). This allows the volute 20 to share the load at the corresponding position of the support structure 70 due to the support of the heat exchanger 60, making the thin-walled volute 20 less likely to deform. In other words, the support structure 70 achieves bidirectional support.

[0132] As mentioned above, the heat exchanger 60 is disposed between the second portion 25 and the water receiving pan 30, with the upper and lower sides of the heat exchanger 60 connected to the second portion 25 and the water receiving pan 30, respectively. In order to achieve the support effect of the heat exchanger 60 on the volute 20 through the support structure 70, please refer to FIG2 . In one implementation, a slot 251 may be formed on the second portion 25, and the notch of the slot 251 faces the side of the wind wheel 50 and faces downward. The upper side of the heat exchanger 60 is embedded in the slot 251. At the same time, a boss supporting the lower side of the heat exchanger 60 may be provided on the water receiving pan 30. The boss has an inclined support surface facing the notch of the slot 251. In this way, the two structures of the water receiving pan 30 and the second portion 25 achieve a clamping and limiting effect on the heat exchanger 60, and achieve a stopping effect on the heat exchanger 60 in the direction away from the wind wheel 50. In this way, when the solution of the present application abuts against the side of the heat exchanger 60 facing the wind wheel 50 through the support structure 70, the heat exchanger 60 is limited in two directions, namely, the direction facing the wind wheel 50 and the direction away from the wind wheel 50, so that the heat exchanger 60 can be stably installed. Of course, the heat exchanger 60 can also support the volute 20 at the connecting shaft position of the two wind wheels 50 through the support structure 70, so that the structure of the entire air-conditioning indoor unit 1 is relatively stable, and the heat exchanger 60 can almost use no connectors during the installation process, which greatly improves the assembly efficiency.

[0133] Referring to Figures 6 and 7 as well as Figures 14 and 15 , in one embodiment, the first portion 24 includes a rotor bracket 241 and a motor bracket 242. The motor bracket 242 is connected to one end of the rotor bracket 241 in the axial direction of the rotor 50 and is used to mount the drive motor 40. The first slot portion 232 is disposed on a side of the rotor bracket 241 away from the motor bracket 242, while the second slot portion 233 surrounds the periphery of the motor bracket 242. It will be appreciated that the rotating shaft of the rotor 50 is rotatably connected to the rotor bracket 241 toward one end of the first slot portion 232. Typically, a bearing is installed between the rotor bracket 241 and the rotating shaft. The bearing reduces friction and prevents wear of the rotor bracket 241 by the rotating shaft during rotation of the rotor 50. The position of the wind rotor bracket 241 corresponding to the bearing needs to be provided with a mounting portion 243 in the form of a boss, and the bearing is fixed in the mounting portion 243, wherein the mounting portion 243 is axially protruding outward and is spaced apart from the periphery of the wind rotor bracket 241. The first groove portion 232 of the present application is formed just below the mounting portion 243. In order to achieve higher production efficiency of the volute 20, the present application may be such that the volute 20 is made of plastic material, and the overall structure is formed by one-piece injection molding. On this basis, since the first groove portion 232 is arranged below the mounting portion 243, if the first groove portion 232 is also formed as a whole during the one-piece molding process of the volute 20, then because there is a mounting portion 243 above it, it will make demolding during the injection molding process relatively difficult, or the mold design will be relatively complicated.

[0134] To this end, the present application further connects a seal 80 to the wind rotor bracket 241. The seal 80 is connected to the periphery of the back side 22 of the wind rotor bracket 241 away from the motor bracket 242, and is located below the rotating shaft of the wind rotor 50 and the mounting portion 243, so as to enclose the wind rotor bracket 241 to form a portion of the first groove portion 232. Specifically, the seal 80 is in the shape of a long strip as a whole, and can be made of plastic, rubber or other materials. The seal 80 and the wind rotor bracket 241 can be fixedly connected together by bonding, welding or the like. In this embodiment, by providing a separate seal 80, the seal 80 replaces a portion of the baffle located below the rotating shaft of the wind rotor 50. In this way, the seal 80 can be installed on the fan bracket after the volute 20 is integrally formed, which is conducive to forming the first groove portion 232 in a relatively low-cost form.

[0135] In this embodiment, the motor bracket 242 is integrally formed with the impeller bracket 241. The air conditioner indoor unit 1 further includes a fixing bracket 244 that is detachably connected to the motor bracket 242. The fixing bracket 244 and the motor bracket 242 enclose a mounting cavity for mounting the drive motor 40, and the drive motor 40 is retained within the mounting cavity. The fixing bracket 244 and the motor bracket 242 are detachably connected, including but not limited to screw connection, snap connection, and the like. The detachable connection between the fixing bracket 244 and the motor bracket 242 facilitates assembly and disassembly of the drive motor 40.

[0136] Furthermore, referring to Figures 16 to 18 , the present application also forms a heat dissipation duct b in the housing 10 , wherein the drive motor 40 is located in the heat dissipation duct b, and the heat dissipation duct b is configured to connect the outside world and the heat exchange duct a. Thus, during operation of the air conditioner indoor unit 1 , the air flow in the heat exchange duct a is driven by the impeller 50 and negative pressure is generated, which can cause air flow in the heat dissipation duct b. This allows outside air to enter the heat dissipation duct b and quickly remove the heat emitted by the drive motor 40 , thereby preventing the drive motor 40 from overheating when operating for a long time. This can improve the stability of the air conditioner indoor unit 1 during long-term operation.

[0137] In this embodiment, an air inlet b1 connecting to the outside and the heat dissipation duct b is provided on the shell 10, and the position of the air outlet b2 connected to the heat dissipation duct b and connected to the heat exchange duct a can be set relatively flexibly. For example, the air outlet can be connected to the cavity of the heat exchange duct a between the wind wheel 50 and the heat exchanger 60, or the air outlet can be connected to the cavity of the heat exchange duct a between the heat exchanger 60 and the return air outlet (as indicated by the dotted line Q in Figure 18, the air outlet of the heat dissipation flow path Q is connected to the cavity of the heat exchange duct a between the heat exchanger 60 and the return air outlet). This application does not impose any restrictions on this.

[0138] Both the heat exchange duct a and the heat dissipation duct b extend along the XX direction and are arranged side by side in the YY direction. This arrangement fully utilizes the space within the air conditioner indoor unit 1 without increasing the overall volume. Specifically, since the motor bracket 242 is connected to one end of the impeller bracket 241 along the axial direction of the impeller 50, and the second portion 25, the heat exchanger 60, and the portion of the water tray 30 located below the heat exchanger 60 on the side facing the motor bracket 242 form the heat dissipation duct b with the inner wall of the housing 10, the aforementioned air outlet can also be formed by the second portion 25, the heat exchanger 60, and the portion of the water tray 30 located below the heat exchanger 60 on the side facing the motor bracket 242. This allows the drive motor 40 to be rationally placed in the heat dissipation duct b, achieving heat dissipation for the drive motor 40 without changing the original layout.

[0139] In order to improve the heat dissipation effect of the drive motor 40, the present application can further provide heat dissipation holes on the motor bracket 242 and / or the fixed bracket 244. The heat dissipation holes connect the space formed by the fixed bracket 244 and the motor bracket 242, and multiple heat dissipation holes are provided. In this way, during the flow of air in the heat dissipation duct b, the air can enter through the heat dissipation holes and directly contact the drive motor 40, thereby achieving effective heat dissipation. It is understood that in order to improve the heat dissipation efficiency, the present application can provide heat dissipation holes on both the fixed bracket 244 and the motor bracket 242, and the periphery of the heat dissipation needs to be formed with a water retaining edge to prevent condensed water from entering.

[0140] Here, it should be emphasized that the air insulation chamber c of the present application is formed between the back side 22 of the volute 20 and the inner wall surface of the box body 11, and the heat dissipation duct b is also formed between the back side 22 of the volute 20 and the inner wall surface of the box body 11, wherein the function of the air insulation chamber c is mainly to block the heat or cold of the volute 20 from being dissipated toward the box body 11. Therefore, such an effect can be met when the air insulation chamber c is in the form of a spatial interval, that is, the air insulation chamber c can be a non-strictly closed setting. For example, as mentioned above, when a water trough structure 23 and a drainage hole 238 are provided on the back side 22 of the volute 20, the drainage hole 238 will also realize the connection between the air insulation chamber c and the heat exchange duct a, but the air flow caused by this is relatively small, so the effect of the air insulation chamber c can still be guaranteed.

[0141] Furthermore, the heat dissipation duct b can also be connected to the air insulation chamber c, or a partition can be provided on the back surface 22 to separate the two. When connected, since the heat dissipation duct b itself has an air inlet b1 connected to the outside world, the main airflow in the heat dissipation duct b comes from the outside world, and the airflow that causes the air insulation chamber c to flow is relatively small. Therefore, the air insulation chamber c can still ensure its thermal insulation effect. In addition, when the heat dissipation duct b is connected to the air insulation chamber c, since the air in the air insulation chamber c is directly cooled by the back surface 22 of the volute 20, the temperature is relatively low. Therefore, when the small amount of low-temperature airflow flowing out of the air insulation chamber c flows through the drive motor 40, it can further enhance the heat dissipation effect.

[0142] The above description is merely an optional embodiment of the present application and does not limit the patent scope of the present application. Any equivalent structural transformation made by using the contents of the present application specification and drawings under the application concept of the present application, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present application.

Claims

1. An air conditioner indoor unit, wherein: include: A shell having a heat exchange air duct formed therein, the shell comprising a box body and a volute, the volute being disposed within the box body and connected to the box body, the volute defining an upper portion of an air duct wall surface of the heat exchange air duct; and A wind wheel and a heat exchanger, wherein the wind wheel and the heat exchanger are arranged in the heat exchange air duct; The volute includes an air duct surface and a back surface that are arranged opposite to each other. The air duct surface forms the upper part of the air duct wall of the heat exchange air duct, and an air insulation cavity is formed between the back surface and the inner wall surface of the box body by spacing.

2. The air conditioning indoor unit according to claim 1, wherein: The box body is formed by enclosing sheet metal parts; And / or, the volute is a plastic part.

3. The air conditioner indoor unit according to claim 1, wherein: The utility model further comprises a support member, wherein the support member is supported between the back surface of the volute and the inner wall surface of the box body.

4. The air conditioning indoor unit according to claim 3, wherein: The support member is integrally formed with the volute; Alternatively, the support member is fixed integrally with the box body; Alternatively, the support member is a component independent of the volute and the casing.

5. The air conditioning indoor unit according to claim 3, wherein: A reinforcement portion is provided at a position where the box body contacts the support member.

6. The air conditioning indoor unit according to claim 3, wherein: The volute comprises a first portion, a second portion, and a volute tongue portion connected between the first portion and the second portion, and the wind wheel and the heat exchanger are respectively installed in the first portion and the second portion; A connecting portion is provided on the edge of at least one of the first part and the second part, and the connecting portion is connected to the box body. The supporting member is provided on the back surface of at least one of the first part and the second part.

7. The air conditioning indoor unit according to claim 6, wherein: A fixing portion is further provided on the back side of the volute tongue portion, and a locking portion is further provided on the box body at a position corresponding to the fixing portion, and the fixing portion is fixedly connected to the locking portion.

8. The air conditioning indoor unit according to claim 7, wherein: The box body is provided with a convex structure at a position corresponding to the snail tongue portion, the fixing portion is a threaded column protruding from the back side of the snail tongue portion, and the locking portion is a locking hole opened on the convex structure.

9. The air conditioning indoor unit according to claim 6, wherein: A step portion is formed on an edge of one side of the first part away from the second part, and the box body is connected to a connecting flange extending toward the interior of the box body; The side surface of the step portion abuts against the inner wall surface of the box body, the bottom surface of the step portion abuts against the connecting flange, and the connecting portion is provided on the step portion.

10. The air conditioner indoor unit according to claim 9, wherein: The connecting portion includes a threaded column arranged on the step portion, and the connecting flange is provided with a connecting hole that cooperates with the threaded column; Wherein, the connecting flange is further provided with a avoidance groove penetrating in the thickness direction thereof, and the avoidance groove is staggered with the connecting hole.

11. The air conditioning indoor unit according to any one of claims 1 to 10, wherein: The heat exchange air duct includes an air return port and an air outlet; The air insulation cavity is located above the heat exchange duct and extends from the air outlet side of the heat exchanger to the air outlet.

12. The air conditioning indoor unit according to claim 11, wherein: The heat exchange air duct includes a return air area between the heat exchanger and the wind wheel and an outlet air area between the wind wheel and the air outlet; The air insulation cavity includes a first cavity corresponding to the return air area and a second cavity corresponding to the outlet air area, wherein the volume of the second cavity is greater than the volume of the first cavity.

13. The air conditioning indoor unit according to any one of claims 1 to 10, wherein: The heat exchanger further comprises a drive motor and a water receiving tray, the water receiving tray being located within the housing, the volute comprising a side surface located on the same side as the air duct surface and the back surface, the drive motor being mounted on the side surface of the volute, the side surface of the volute, the inner wall surface of the housing, the water receiving tray, and the side surface of the heat exchanger further forming a heat dissipation duct, the drive motor being located within the heat dissipation duct; Wherein, the heat dissipation duct is communicated with the air insulation cavity.

14. The air conditioning indoor unit according to claim 13, wherein: The heat dissipation duct further includes an air inlet and an air outlet. The air inlet is provided on the box body and communicates with the outside, and the air outlet communicates with the heat exchange duct.

15. The air conditioner indoor unit according to claim 1, wherein: Also includes a water tray; The water receiving tray is arranged below the volute and connected to the box body, and the heat exchange air duct is arranged between the water receiving tray and the volute; The volute is also provided with a water trough structure on the back side, and a drainage hole connecting the water trough structure and the water receiving tray is provided. The liquid on the back side can be gathered in the water trough structure and flow into the water receiving tray through the drainage hole.

16. The air conditioning indoor unit according to claim 15, wherein: The volute includes a first part and a second part, the impeller is installed in the first part, and the heat exchanger is connected between the second part and the water receiving pan; The water tank structure includes a water tank, which is arranged on the periphery of the back side of the first part, and the drainage hole is provided on the bottom wall of the water tank.

17. The air conditioning indoor unit according to claim 16, wherein: The volute further includes a volute tongue portion connected between the first portion and the second portion; The water trough structure further includes a water collecting trough formed on the back side of the volute tongue portion, and the water collecting trough is connected to the water containing trough.

18. The air conditioning indoor unit according to claim 17, wherein: The water collecting tank has drainage ports at both ends of the wind wheel in the axial direction, and both drainage ports are communicated with the water containing tank.

19. The air conditioning indoor unit according to claim 17, wherein: The drainage hole is also provided on the bottom wall of the water collecting trough.

20. The air conditioning indoor unit according to claim 17, wherein: The water trough structure further includes a water inlet trough, which is arranged on at least one side periphery of the second portion along the axial direction of the wind wheel and is communicated with the water containing trough.

21. The air conditioning indoor unit according to any one of claims 16 to 20, wherein: The water tank comprises a first tank body portion, a second tank body portion and a third tank body portion which are connected to each other. The first tank body portion and the second tank body portion are arranged at two opposite edges of the first portion along the axial direction of the wind wheel. The third tank body portion is arranged at a circumference of the first portion away from the second portion. Wherein, the bottom wall of the first trough body part and the bottom wall of the second trough body part are both provided with the drainage hole.

22. The air conditioning indoor unit according to claim 21, wherein: The downward projections of the drainage holes of the first trough body portion and the drainage holes of the second trough body portion both fall within the area of ​​the water receiving tray.

23. The air conditioning indoor unit according to claim 21, wherein: It also includes a drive motor connected to the wind rotor; the first part includes a wind rotor bracket and a motor bracket, and the drive motor is mounted on the motor bracket; the motor bracket is connected to one end of the wind rotor bracket in the axial direction of the wind rotor, and the first slot portion is arranged on a side of the wind rotor bracket away from the motor bracket; The wind wheel bracket is also connected to a sealing member, which is connected to the periphery of the back side of the wind wheel bracket away from the motor bracket and is located below the rotating shaft of the wind wheel to enclose the wind wheel bracket to form a part of the first slot body.

24. The air conditioning indoor unit according to any one of claims 16 to 20, wherein: At least two wind wheels are coaxially arranged in the first part; The air-conditioning indoor unit also includes a support structure connected to the first part, the support structure is arranged between two adjacent wind wheels, the support structure includes a support base and a connecting component, the connecting component is installed on the support base and is configured to connect the rotating shafts of two adjacent wind wheels, the support base is connected to the first part and abuts against the heat exchanger.

25. The air conditioner indoor unit according to claim 24, wherein: The support structure further includes a buffer member connected to the support seat and abutting against the heat exchanger.

26. The air conditioner indoor unit according to claim 24, wherein: The support base includes: a first support member connected to the first portion; and The second support member is detachably connected to the first support member and / or the first part. The second support member cooperates with the first support member to form an installation space for installing the connecting component, and the outer wall surface of the second support member abuts against the heat exchanger.

27. A heating and ventilation equipment, wherein: Comprising the air conditioner indoor unit according to any one of claims 1 to 26.

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