Air conditioner indoor unit and heating and ventilation equipment

Abstract

The utility model discloses an air conditioner indoor unit and heating and ventilation equipment. The air conditioner indoor unit comprises a shell, a water pan, a wind wheel and a heat exchanger. A heat exchange air duct is formed in the shell, the shell comprises a box body and a volute, and the volute is arranged in the box body and connected with the box body; the volute defines an upper part air duct wall surface of the heat exchange air duct; the wind wheel and the heat exchanger are arranged in the heat exchange air duct; the volute comprises an air duct face and a back face which are arranged back to back, the air duct face forms an upper air duct wall face of the heat exchange air duct, and an air heat insulation cavity is formed between the back face and the inner wall face of the box body in a spaced mode. According to the technical scheme, the structure of the air conditioner indoor unit is simplified, and the cost is reduced.

Description

Technical Field

[0001] 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

[0002] The HVAC equipment includes an air conditioner indoor unit, which includes an outer shell and a volute, a wind wheel, a heat exchanger, a water tray and other components arranged in the outer shell. The wind wheel and the heat exchanger are both arranged in the heat exchange air duct, and the volute is an important component of the heat exchange air duct. The wind wheel rotates under the drive of the motor, driving the external air flow to flow through the heat exchange air duct, and in the process, heat is exchanged with the heat exchanger to achieve temperature and humidity regulation.

[0003] 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 outwards 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 transfer to the outside, resulting in reduced energy efficiency.

[0004] In related designs, there is a method of covering the surface of the volute away from the heat dissipation duct with a thermal insulation material layer, for example, the thermal insulation material layer can be a foam layer with a certain thickness, so that the foam layer is used to block the cold or heat transfer from the volute to the outer shell. However, such a design will increase the complexity of the stacked structure on the volute and increase the cost of the entire air conditioner indoor unit. Utility Model Content

[0005] The main purpose of the utility model is to provide an air-conditioning indoor unit, aiming to optimize the structure of the air-conditioning indoor unit so as to simplify the structure of the air-conditioning indoor unit and reduce its cost.

[0006] In a first aspect, an embodiment of the present application provides an indoor unit of an air conditioner, comprising a housing, a wind wheel and a heat exchanger, wherein a heat exchange air duct is formed in the housing, the housing comprises a box body and a volute, the volute is arranged in the box body and connected to the box body, the volute defines an upper part of the duct wall surface of the heat exchange air duct; the wind wheel and the heat exchanger are arranged in the heat exchange air duct;

[0007] The volute comprises an air duct surface and a back surface which are arranged opposite to each other, the air duct surface forms the upper part of the air duct wall surface 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.

[0008] In one embodiment, the box body is formed by enclosing sheet metal parts;

[0009] And / or, the volute is a plastic part.

[0010] In one embodiment, the air conditioner indoor unit further includes a support member, wherein the support member is supported between the back side of the volute and the inner wall surface of the box body.

[0011] In one embodiment, the support member is integrally formed with the volute;

[0012] Alternatively, the support member is fixed integrally with the box body;

[0013] Alternatively, the support member is a component independent of the volute and the casing.

[0014] In one embodiment, a reinforcement portion is provided at a position where the box body contacts the support member.

[0015] In one embodiment, the volute includes a main body and a connecting part, the main body includes a first part, a second part and a volute tongue part connected between the first part and the second part, and the wind wheel and the heat exchanger are installed in the first part and the second part respectively;

[0016] The connecting portion is connected to the edge of at least one of the first part and the second part, and is connected to the box body. The supporting member is arranged on the back side of at least one of the first part and the second part.

[0017] 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.

[0018] In one embodiment, a convex structure is provided on the box body at a position corresponding to the volute tongue portion, the fixing portion is a threaded column protruding from the back side of the volute tongue portion, and the locking portion is a locking hole provided on the convex structure.

[0019] In one embodiment, 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 with a connecting flange extending toward the inside of the box body;

[0020] 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.

[0021] In one embodiment, the connecting portion includes a threaded column arranged on the step portion, and the connecting flange is provided with a connecting hole matched with the threaded column;

[0022] Wherein, the connecting flange is also provided with a avoidance groove penetrating in the thickness direction thereof, and the avoidance groove is staggered with the connecting hole.

[0023] In one embodiment, the heat exchange air duct includes an air return port and an air outlet;

[0024] The air insulation cavity is located above the heat exchange air duct and extends from the air outlet side of the heat exchanger to the air outlet.

[0025] 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;

[0026] 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.

[0027] In one embodiment, a drive motor is further included, the volute includes a side surface located on the same side of the air duct surface and the back surface, the drive motor is installed on the side surface of the volute, the side surface of the volute, the inner wall surface of the box body, the water receiving tray and the side surface of the heat exchanger also enclose a heat dissipation air duct, and the drive motor is located in the heat dissipation air duct;

[0028] Wherein, the heat dissipation duct is communicated with the air insulation cavity.

[0029] In one embodiment, the heat dissipation air 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 air duct.

[0030] In a second aspect, the utility model further provides a HVAC device, including the air-conditioning indoor unit as described above.

[0031] The technical solution of the utility model 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 for the volute to be covered with a thermal insulation material layer as in the conventional design. Moreover, through such an arrangement, the overall structure of the air-conditioning indoor unit is simplified due to the omission of the thermal insulation material layer, and the production cost can be effectively reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 the structures shown in these drawings without paying any creative work.

[0033] Figure 1 This is a three-dimensional structural diagram of an embodiment of an air-conditioning indoor unit of the utility model;

[0034] Figure 2 for Figure 1 The exploded structural diagram of the indoor unit of the air conditioner is shown;

[0035] Figure 3 for Figure 1 A three-dimensional structural schematic diagram of an air-conditioning indoor unit from another perspective is shown;

[0036] Figure 4 for Figure 1 A cross-sectional schematic diagram of an indoor unit of an air conditioner is shown;

[0037] Figure 5 for Figure 1 The schematic diagram of the structure of part of the air conditioner indoor unit after removing the shell is shown;

[0038] Figure 6 for Figure 1 The exploded structural diagram of the box body and the volute in the indoor unit of the air conditioner is shown;

[0039] Figure 7 for Figure 5 A schematic diagram of the exploded structure of the structure shown;

[0040] Figure 8 for Figure 1 A schematic diagram showing a volute in an indoor unit of an air conditioner in a top view;

[0041] Fig. 9 for Figure 8 Schematic diagram of the flow of condensed water on the volute;

[0042] Fig.10 for Figure 1 A schematic diagram showing a volute in an indoor unit of an air conditioner when viewed from above;

[0043] Fig.11 It is a schematic diagram of the assembly of the support base and the volute in the indoor unit of the air conditioner of the utility model;

[0044] Fig.12 for Fig.11 Enlarged view of L in the figure;

[0045] Fig.13 for Fig.12 A schematic structural diagram of the second support body in FIG.

[0046] Fig.14 for Figure 1 The exploded structural diagram of the air conditioner indoor unit without the casing is shown;

[0047] Fig.15 for Fig.14 The enlarged view of K in the figure;

[0048] Fig.16 for Figure 1 A schematic diagram of the side structure of an air conditioner indoor unit is shown;

[0049] Fig.17 for Figure 1 Another exploded structural schematic diagram of the air conditioner indoor unit is shown;

[0050] Fig.18 for Fig.16 Section view along NN.

[0051] Description of Figure Numbers:

[0052] 1. Indoor unit of air conditioner; 10. Shell; 11. Box; 111. Bottom plate; 112. Enclosure; 113. Fixed side plate; 114. Movable side plate; 115. Connection flange; 116. Reinforcement part; 117. Convex structure; 118. Locking part; 119. Avoidance groove; 12. Connection 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. Drainage recess; 237. Water diversion tank; 238. Drain hole; 24. First part; 241. Wind wheel bracket; 242. Motor bracket; 243. Mounting part; 244. Fixed bracket; 245. Connection Connecting part; 25, second part; 251, slot; 26, volute tongue; 261, fixing part; 27, supporting member; 28, step part; 29, side of volute; 30, water collecting tray; 31, main body; 32, edge; 33, avoidance opening; 40, driving motor; 50, wind wheel; 60, heat exchanger; 70, supporting structure; 71, supporting seat; 711, first supporting body; 712, second supporting body; 713, drainage channel; 72, connecting assembly; 73, buffer member; 80, sealing member; a, heat exchange air duct; a1, return air outlet; a2, air outlet; a3, return air area; a4, air outlet area; b, heat dissipation air duct; b1, air inlet; b2, air outlet; c, air insulation cavity; c1, first cavity; c2, second cavity; Q, heat dissipation flow path.

[0053] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0054] In order to make the objectives, technical solutions and advantages of the present application clearer, the following part will further describe the embodiments of the present application in detail in conjunction with the accompanying drawings.

[0055] When the following description refers to the 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 only examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims.

[0056] In the description of the present 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 the present application can be understood according to the specific circumstances. In addition, in the description of the present 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 objects associated before and after are in an "or" relationship.

[0057] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in this specification are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0058] 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-conditioning 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-conditioning indoor unit. The above air-conditioning indoor units are installed in the indoor environment and can be used to adjust the temperature and humidity of the indoor environment.

[0059] The basic structure of the indoor unit of the air conditioner includes a volute, a water tray, a heat exchanger, a driving motor, a wind wheel and other parts. A heat exchange duct is provided between the volute and the water tray. The wind wheel and the heat exchanger are both arranged in the heat exchange duct. The volute is an important part of the heat exchange duct. The wind wheel rotates under the drive of the motor, and the external airflow is sucked into the heat exchange duct by forming a negative pressure in the heat exchange duct. In this process, the airflow exchanges heat with the heat exchanger, thereby achieving temperature and humidity regulation. It can be understood that in different forms of HVAC equipment, the heat exchange medium flowing in the heat exchanger in the indoor unit of the air conditioner is different. For example, in the indoor unit of the air conditioner of the central air conditioner, the heat exchange medium flowing in the heat exchanger is refrigerant, while in the air-conditioned room of the heat pump air conditioner, the heat exchange medium flowing in the heat exchanger is chilled water.

[0060] 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 outwards 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 transfer to the outside, resulting in reduced energy efficiency.

[0061] In related designs, there is a method of covering the surface of the volute away from the heat dissipation duct with a thermal insulation material layer, for example, the thermal insulation material layer can be a foam layer with a certain thickness, so that the foam layer is used to block the cold or heat transfer from the volute to the outer shell. However, such a design will increase the complexity of the stacked structure on the volute and increase the cost of the entire air conditioner indoor unit.

[0062] Therefore, the present application proposes an air-conditioning indoor unit, which has a more optimized structure than the design of a conventional air-conditioning indoor unit, a simpler overall structure, and a relatively lower production cost.

[0063] Please refer to Figures 1 to 4 , Figure 1 is a schematic diagram of the overall structure of the air-conditioning indoor unit 1, Figure 2 It is a schematic diagram of the exploded structure of the air conditioner indoor unit 1; Figure 3 It is a three-dimensional structural schematic diagram of the air-conditioning indoor unit 1 from another perspective. Figure 4 for Figure 1 The cross-sectional schematic diagram of the air-conditioning indoor unit 1 is shown. The air-conditioning indoor unit 1 of this embodiment includes a housing 10, a heat exchanger 60, a driving motor 40 and a wind wheel 50.

[0064] The housing 10 includes a box body 11 and a volute 20. In one embodiment, the housing 10 may also include a water receiving tray 30. The box body 11 is used to protect and carry the volute 20 and the water receiving tray 30 and other parts inside it, and it also serves as the appearance of the whole machine. In one embodiment, the box body 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 form with one side open, so that the volute 20, the water receiving tray 30, the heat exchanger 60, the drive motor 40 and the wind wheel 50 can be accommodated in the box body 11 and protected by the box body 11. The air conditioner indoor unit 1 of the present application can be installed on the ceiling in the indoor environment. In order to adapt to its installation environment, the entire air conditioner indoor unit 1 can be in a relatively flat three-dimensional structure, that is, the box body 11 can constitute a flat cubic shape, wherein the box body 11 can be in the form of a rectangular parallelepiped, a disc, etc.

[0065] exist Figures 1 to 3 The box body 11 shown as an example is in the form of a flat rectangular parallelepiped. Figure 1As shown in the coordinate system in , 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 of a whole sheet metal by cutting, stamping, bending and other processes, and of course, the fixed side panels 113 and the bottom plate 111 can also be fixed as a whole by welding. There are also two movable side panels 114, which are arranged between the two fixed side panels 113 and located on opposite sides of the bottom plate 111. Specifically, the two movable side panels 114 are connected to opposite sides of the bottom plate 111 along the YY direction, so that the bottom plate 111, the fixed side panels 113 and the movable side panels 114 are enclosed to form a shape in which one side of the box body 11 is open. Among them, the fixed side panels 113 and the bottom plate 111 are bent to form a skirt on the side connected to the movable side panels 114, and the movable side panels 114 are assembled on the inner side of the skirt and are detachably fixedly connected to the bottom plate 111 and the fixed side panels 113 by means of screws, for example.

[0066] The air conditioner indoor unit 1 can be hoisted on the ceiling. Specifically, the air conditioner indoor unit 1 also includes a plurality of connecting ears 12, and the connecting ears 12 are fixedly connected to the box body 11, so that the entire air conditioner indoor unit 1 can be hoisted on the ceiling by cooperating with the connecting ears 12 through the suspension rod. In the present application, the box body 11 is formed by enclosing sheet metal parts, for example, it can be specifically surrounded by iron alloy or aluminum alloy plates, so that the box body 11 has a higher structural strength, and after hoisting, the internal structure can have a better protection effect, and the box body 11 itself is not easy to deform.

[0067] 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 as a multi-fold plate structure, part of the structure of the connecting ear 12 is located inside the box body 11, 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 a positioning groove and a positioning protrusion 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 are locked by screws, so that 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 fixed by screws, bolts, rivets and other connecting parts. In this way, the connection between the connecting ear 12 and the box body 11 is more stable through multiple fixations. 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.

[0068] In one embodiment, the housing 10 may further include a panel (not shown), which is connected to the lower part of the box body 11 and covers the open part of the box body 11 in the exemplary placement posture shown in the figure. The water receiving tray 30 and the volute 20 are arranged in the space enclosed by the box body 11 and the panel. After the air conditioner indoor unit 1 is installed on the ceiling, the panel can be arranged almost flush with the ceiling, and the panel just covers the installation opening on the ceiling, or the entire air conditioner indoor unit 1 can also be arranged to be sunken relative to the ceiling, so that the box body 11 is also partially exposed from the installation opening position of the ceiling.

[0069] The volute 20 of the present application may be fixedly connected to the housing 11, and the specific fixed connection forms include but are not limited to one of screw connection, welding, bonding, etc. The water receiving tray 30 may be detachably connected to the housing 11, and the detachable connection methods include screw connection, sliding connection, etc.

[0070] Please refer to Figure 5 In one embodiment, the volute 20 can be fixedly connected to the housing 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 housing 11 through the connecting portion 245.

[0071] Please refer to Figures 1 to 5In 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. The volute 20 includes a duct surface 21 and a back surface 22 arranged opposite to each other. 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 spacing.

[0072] Therefore, the technical solution of the present application forms an air insulation chamber 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 chamber c can block the heat transfer from the volute 20 to 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 good insulation effect without the need for the volute 20 to be covered with a thermal insulation material layer as in the conventional design. Moreover, through such a setting, since the setting of the thermal insulation material layer is omitted, the overall structure of the air-conditioning indoor unit is simplified and the production cost can be effectively reduced.

[0073] Further, please refer again to Figure 4 , the heat exchange air duct a includes a return air port a1 and an air outlet a2; the air insulation chamber c is located above the heat exchange air duct a, extending 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 the cooling mode, the temperature of the air is reduced after the heat exchange of the heat exchanger 60 in the heat exchange air duct a, and driven by the wind wheel 50, the air flow acts on the air 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, and has a certain static pressure. This area is an area where the 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. The present application effectively reduces the 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.

[0074] Furthermore, the heat exchange air duct a includes a return air area a3 located between the heat exchanger 60 and the wind wheel 50 and an outlet air area a4 located between the wind wheel 5 and the air 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 the volume of the first cavity c1. In this embodiment, the second cavity c2 corresponds to the outlet air side of the wind wheel 50, so the airflow in the heat exchange air duct a has a greater static pressure effect on the volute 20 in the outlet air area a4, and the heat exchange here is more intense. Therefore, the present application designs the volume of the second cavity c2 to be greater than the volume of the first cavity c1, and while meeting the insulation requirements, the entire volume of the air conditioner indoor unit can also be made more compact.

[0075] 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, and the wind wheel 50 and the heat exchanger 60 are installed in the first portion 24 and the second portion 25, respectively.

[0076] The volute 20 of the present application is a thin-walled structure as a whole, which can be made of plastic and is produced by one-piece injection molding. Through such a configuration, the volute 20 has the advantages of being light in weight, easy to manufacture, 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 airflow reflux phenomenon, and thus improving energy efficiency.

[0077] Among them, at least one of the first part 24 and the second part 25 is provided with a connecting portion 245 at the edge along the XX direction in the figure, and is connected to the housing 11 through the connecting portion 245. Preferably, the edge positions of the first part 24 and the second part 25 can be provided with connecting portions 245, so that the connection structure between the volute 20 and the housing 11 is more secure.

[0078] In one embodiment, the air conditioner indoor unit 1 further includes a support member 27, and the support member 27 is supported between the back side 22 of the volute 20 and the inner wall surface of the box body 11. Specifically, the support member 27 is supported between the back side 22 of the volute 20 and the inner wall surface of the bottom plate 111 of the box body 11. In this embodiment, by providing the support member 27, when the volute 20 is fixed to the box body 11, the support member 27 can effectively prevent the box body 11 from collapsing, for example, at the bottom plate 111, so that the air insulation cavity c can maintain the required height dimension in the up and down direction, thereby ensuring its insulation effect.

[0079] Further, the present application may be that the back side 22 of the first part 24 is also provided with a support member 27, or the back side 22 of the second part 25 is provided with a support member 27, or the first part 24 and the second part 25 are provided with support members 27 at the same time. In the scheme exemplarily shown in the figure, the first part 24 and the second part 25 are provided with support members 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 box body 11 as a whole, for example, the bottom plate 111 of the box body 11 is fixed with the support member 27 by stamping, welding, etc. In addition, the support member 27 may also be a part independent of the volute 20 and the box body 11.

[0080] When the support member 27 is an integral structure with the volute 20 or the housing 11, the support member 27 may be a block structure. For example, as shown in the figure, a plurality of support members 27 are arranged at intervals in the YY direction along the back side 22 of the volute 20. In this way, while ensuring the supporting effect, the use of materials can be reduced, thereby reducing costs. When the support member 27 is a separate part, the support block may be made of a heat-insulating material, for example, a block of foam or sponge.

[0081] The use of the support member 27 can effectively prevent the box body 11 from collapsing inwards. At this time, the support member 27 has a force on the bottom plate 111 of the box body 11. In this case, the box body 11 in the form of a sheet metal part may also be deformed outwardly. Therefore, in order to improve the structural strength of the box body 11, a reinforcing portion 116 is provided at the position where the box body 11 contacts the support member 27. In one structural form, the reinforcing portion 116 can be formed by stamping the bottom plate 111 of the box body 11. Specifically, the reinforcing portion 116 can include a plurality of slots arranged at intervals in the XX direction, and each slot extends in the YY direction to match with a plurality of support members 27 arranged at intervals in the YY direction. It can be understood that the provision of the reinforcing portion 116 can prevent the part from being deformed due to the external force of the support member 27, and the reinforcing portion 116 is in the form of a slot, and no other parts need to be provided, so the production cost is low.

[0082] It is understandable that the reinforcing portion 116 may also be in other forms, such as ribs, convex points, etc., and the present application does not limit this.

[0083] As mentioned above, the volute 20 can be connected to the housing 11 by providing a connection portion 245 at the edges of 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. The back side 22 of the volute tongue portion 26 is also provided with a fixing portion 261, and the housing 11 is also provided with a locking portion 118 at a position corresponding to the fixing portion 261, and 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 volute tongue portion 26 can be fixed at three locations, namely, at both sides and in the middle, through the cooperation of the fixing portion 261 and the locking portion 118, so that the connection structure is more stable.

[0084] In one embodiment, the housing 11 is provided with a convex structure 117 at a position corresponding to the volute tongue portion 26, the fixing portion 261 is a threaded column protruding from the back side 22 of the volute tongue portion 26, and the locking portion 118 is a locking hole provided on the convex structure 117. Specifically, the convex structure 117 can be formed by punching a part of the structure of the bottom plate 111 inward, and after assembly, the convex structure 117 extends toward the direction of the volute 20. By providing the locking portion 118 on the convex structure 117, it can also be ensured that when the volute 20 is connected to the housing 11 at this location, the housing 11 is not easily deformed at this location.

[0085] 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.

[0086] The present application arranges the wind wheel 50 and the heat exchanger 60 in a spaced manner in the direction from the return air port a1 to the air outlet a2, that is, the wind wheel 50 is located upstream in the air flow direction. As shown in the figure, it is arranged below the first part 24 corresponding to the air outlet a2, that is, the airflow first passes through the heat exchanger 60 and then is driven by the wind wheel 50 to be discharged through the air outlet a2 on the panel. Therefore, the airflow pressure out of the first part 24 is relatively large. In this way, in order to prevent the airflow from entering the air insulation cavity c from the gap between the volute 20 and the box body 11 at this location, a step portion 28 is formed on the edge of one side of the first part 24 away from the second part 25, and the box body 11 is connected to a connecting flange 115 extending toward the inside of the box body 11; the side surface of the step portion 28 abuts against the inner wall surface of the box body 11, and the bottom surface of the step portion 28 abuts against the connecting flange 115, wherein the above-mentioned connecting portion 245 is arranged on the step portion 28. The formation of the step portion 28 of the present embodiment enables two sealing surfaces to be formed between the volute 20 and the casing 11 at a position corresponding to the air outlet a2, and 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 chamber c through the gap between the volute 20 and the casing 11, thereby reducing the air volume loss and improving energy efficiency.

[0087] For further information, please refer to Figures 3 to 6, the connection part 245 includes a threaded column arranged on the step part 28, and the connection flange 115 is provided with a connection hole 1151 matched with the threaded column; wherein, the connection flange 115 is also provided with a avoidance groove 119 penetrating 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 sponge, silicone, foam and other materials, then after the panel is installed on the box body 11, the sealing ring on the panel of the present application can align the connection flange 115 in the up and down direction, and the connection flange 115 is provided with the avoidance groove 119, so that part of the material of the sealing ring can pass through the avoidance groove 119 and seal with the bottom surface of the step part 28 on the volute 20, so that the sealing ring can better block the gap between the volute 20 and the box body 11, thereby effectively preventing the air volume of the air outlet from entering the air insulation cavity c through the gap there.

[0088] In one embodiment, please refer to Figure 5 , Figures 7 to 9 The volute 20 is also provided with a water tank structure 23 on the back side 22, and a drainage hole 238 connecting the water tank 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 tank structure 23 and flow into the water receiving pan 30 through the drainage hole 238.

[0089] 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 chamber c while omitting the structure of the insulation layer. However, since the volute 20 is in direct contact with the airflow in the heat exchange duct a, in the cooling mode, the volute 20 may also have condensation on the back 22 due to the low temperature of the volute 20 itself. It should be noted that this part of condensation is a small amount of condensed water on the back 22 of the volute 20, and the air insulation chamber c is to block the heat transfer from the back 22 to the box body 11. There is no contradiction between these two aspects, 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. Therefore, the water tank structure 23 of this embodiment is used to collect the condensed water generated on the back side 22 of the volute 20, so as to prevent the condensed water from directly overflowing the range of the volute 20 and flowing around inside the air conditioner indoor unit 1, thereby threatening the performance of other components in the air conditioner indoor unit 1, or dripping into the installation environment of the air conditioner indoor unit 1, thereby improving 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, and the drain hole 238 is connected to the water receiving pan 30. Here, since the water receiving pan 30 is located below the volute 20, the drain hole 238 can be projected downwardly in the area of ​​the water receiving pan 30, so that the condensed water flowing out of the drain hole 238 can directly drip into the water receiving pan 30 by gravity. Of course, the downward projection of the drain hole 238 may not be located in the area of ​​the water receiving pan 30, so that a drain pipe connected to the drain hole 238 can be designed, and the drain hole 238 and the water receiving pan 30 are connected through the drain pipe.

[0090] The water tank structure 23 includes a water tank 231, which is arranged at the periphery of the back side 22 of the first part 24, and the drainage hole 238 is arranged on the bottom wall of the water tank 231. It can be understood that in the cooling mode, most of the condensed water generated on the heat exchanger 60 can flow along its own structure and enter the water receiving tray 30, wherein the heat exchanger 60 structure includes a side plate and a heat exchange tube, and the heat exchange tube is penetrated through the side plate 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 are to 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 plates, the axial size of the water receiving tray 30 of the wind wheel 50 is larger than the axial size of the volute 20. That is, in the present 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.

[0091] The water receiving tray 30 is formed with an escape area directly below the wind wheel 50, and 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 receiving tray 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 receiving tray 30 in the case of free fall, and this part of the condensed water will affect the operation of the machine.

[0092] To this end, the water tank structure 23 includes a water tank 231, which is arranged at the periphery of the back side 22 of the first part 24, and the drainage hole 238 is provided on the bottom wall of the water tank 231. As for the formation of the water tank 231, the solution of the present application may be that during the molding process of the volute 20, a blocking edge extending upward is integrally formed at the periphery of the back side 22 of the first part 24, and the blocking edge cooperates with the structure of the first part 24 to enclose the water tank 231. It can be understood that the blocking edge may also be the edge of the back side 22 of the first part 24 fixed to the edge by, for example, welding, bonding, etc. after the volute 20 is manufactured.

[0093] 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.

[0094] 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, so that the condensed water generated on the back side 22 of the first part 24 can be effectively collected by the water storage tank 231 and discharged into the water receiving tank when flowing in multiple directions.

[0095] In one embodiment, the water tank 231 includes a first tank body portion 232, a second tank body portion 233 and a third tank body portion 234 which are connected to each other. The first tank body portion 232 and the second tank body portion 233 are arranged at the opposite sides of the first portion 24 along the axial direction of the wind wheel 50, and the third tank body portion 234 is arranged at the periphery of the first portion 24 away from the second portion 25. The bottom wall of the first tank body portion 232 and the bottom wall of the second tank body portion 233 are both provided with drainage holes 238.

[0096] In this embodiment, drainage holes 238 are provided on the bottom walls of the first groove body portion 232 and the second groove body portion 233, so that the condensed water in the water tank 231 can be discharged quickly, thereby avoiding the overflow of the water tank 231 when a large amount of condensed water is generated, thereby further ensuring the safe operation of the air-conditioning indoor unit 1.

[0097] The present application further provides a partial structure of the water receiving tray 30 directly below the drainage hole 238 of the first trough body 232 and the drainage hole 238 of the second trough body 233. By such an arrangement, the condensed water discharged from the drainage holes 238 at the two positions can fall directly into the water receiving tray 30 by gravity, thus omitting the structure of the pipe and the like, thereby simplifying the structure.

[0098] Please refer to Figures 7 to 9 The water tank structure 23 also includes a water collecting tank 235 formed on the back side 22 of the volute tongue portion 26 , and the water collecting tank 235 is connected to the water containing tank 231 . The volute tongue portion 26 is formed by a thin-walled structure of the volute 20 located between the first portion 24 and the second portion 25, which is recessed toward the water receiving tray 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 the present application, the water collecting groove 235 is connected to the water containing 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 from the air conditioner indoor unit 1. On the other hand, since the water collecting groove 235 is arranged above the water containing tank 231, in the process of the condensed water flowing toward the water containing tank 231, it can be first intercepted and diverted by the water collecting groove 235, and then flow into the water containing tank 231. In this process, at least the condensed water generated at the highest point of the first portion 24 is changed in direction during its downward flow, thereby reducing the energy of the condensed water directly impacting the water containing tank 231 and reducing the risk of the condensed water splashing out of the water containing tank 231.

[0099] In order to speed up the discharge of condensed water in the water collecting tank 235, the water collecting tank 235 has drain ports 2351 at both ends along the YY direction, and both drain ports 2351 are connected to the water containing 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. Through such a setting, the condensed water in the water collecting tank 235 can be quickly discharged from two directions without being easily retained. It can be understood that, in the case of meeting the drainage requirements, the present application can also be provided with a drain port at one end of the water collecting tank 235.

[0100] Since the present application omits the design of providing an insulation layer on the back side 22 of the volute 20 in the conventional design, condensed water will also form on the back side 22 of the second part 25. From the above content, we know that the condensed water on the second part 25 can overflow into the water receiving tray 30 located below it. In the present application, when a water collecting tank 235 is formed on the volute tongue portion 26, it can also be considered to discharge at least a portion of the condensed water generated on the back side 22 of the second part 25 from the water collecting tank 235 to the water receiving tray 30. This can reduce the risk of condensed water splashing onto the pipes or electronic components located below the two sides of the second part 25 during the direct overflow from the second part 25. For details, please refer to Figures 7 to 9 In the present application, a water diversion groove 237 extending from top to bottom toward the water collection groove 235 may be formed on the back side 22 of the second part 25, and the water diversion groove 237 is arranged on at least one side periphery of the second part 25 along the YY direction, and the lower end of the water diversion groove 237 is connected to the water storage groove 231. That is, as Fig. 9 As indicated by the flow direction of the middle arrow, 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 to the water containing groove 231 in an orderly manner, thereby improving the stability of the air-conditioning indoor unit 1 during operation.

[0101] It can be understood that the number of water diversion grooves 237 can be 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 arranged on the back side 22 of the second part 25. In order to enhance the diversion effect of the condensed water on the second part 25, the present application can be provided with water diversion grooves 237 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.

[0102] From the above content, we know that the water collecting tank 235 will be able to collect part of the condensed water generated by 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 water collecting tank 235, please refer to Fig.10 In some embodiments, a drainage hole 238 may also be provided on the bottom wall of the water collecting trough 235. As mentioned above, the water collecting pan 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, so the downward projection of the volute tongue portion 26 between the first portion 24 and the second portion 25 also falls within the area of ​​the water collecting pan 30. Therefore, the drainage hole 238 provided on the bottom wall of the water collecting trough 235 can directly discharge the condensed water into the water collecting pan 30 in the form of free fall, which greatly speeds up the discharge efficiency of the condensed water in the water collecting trough 235 and avoids the retention phenomenon.

[0103] In order to make the air conditioner 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 only 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 the stability of the structure, at least two wind wheels 50 are coaxially arranged in the first part 24, please refer to Fig.11 The air conditioner 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 component 72, the connecting component 72 is installed on the support seat 71 and is used to connect the rotating shafts of the two adjacent wind wheels 50.

[0104] Please refer to Fig.12 and Fig.13 , the number of wind wheels 50 shown in the figure is two, and the support seat 71 supports the rotating shafts of the two wind wheels 50. Furthermore, the present application also provides a drainage channel 713 in the support seat that is connected to the drainage hole 238 provided on the bottom wall of the water collecting tank 235 in the above content, and flows to the water receiving pan 30 through the drainage channel 713. Therefore, the drainage channel 713 structure formed in the support seat 71 is conducive to the process of draining the condensed water in the water collecting tank 235 from the drainage channel 713 to the water receiving pan 30, so that as little as possible drips onto the wind wheel 50, causing the condensed water to splash onto the air duct surface 21 during the rotation of the wind wheel 50, so as to reduce the possibility of the condensed water dripping from the return air port or the air outlet along the air duct surface 21 to the internal installation environment of the air conditioner indoor unit 1.

[0105] The connection assembly 72 includes a bearing and a bearing seat, wherein the support seat 71 is provided with an installation space for installing the connection assembly 72, and the bearing seat is fixed in the installation space. The bearing can be a rolling bearing, in which case the outer ring of the bearing is fixed on the bearing seat, and the inner ring is fixed to the rotating shaft of the wind wheel 50. Of course, the bearing can also be a sliding bearing. In the case of a sliding bearing, the bearing is relatively fixed to the bearing seat and slides with the rotating shaft of the wind wheel 50. In the above content, the drainage channel 713 formed in the support seat 71 is relatively isolated from the installation space.

[0106] In order to facilitate the assembly of the connection assembly 72, the support seat 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, clamping, 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 assembly 72 and the rotating shafts of the two wind wheels 50 is more convenient.

[0107] Please refer to Figures 7 to 10 ,as well as Fig.12 and Fig.13 , the first support body 711 of the present application can be integrally formed with the first part 24, so that assembly is easier. And the drainage channel 713 in the support seat 71 can be formed by the first support body 711 alone, or by the second support body 712, or by the first support body 711 and the second support body 712. In one embodiment, a drainage recess 236 formed by a depression from the back side 22 toward the inside of the first support body 711 is formed on the volute tongue portion 26, that is, the drainage recess 236 can also be understood as being formed by further depression of the bottom wall of the water collecting trough 235. Among them, the drainage hole 238 provided on the water collecting trough 235 is opened on the bottom wall of the drainage recess 236, that is, the drainage hole 238 and the drainage recess 236 are provided on the first support body 711, and the above-mentioned 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 with less material. In this application, a drainage hole 238 is arranged at the position of the first support body 711 and a drainage channel 713 is formed in the first support body 711, so that the condensed water can be effectively prevented from being retained at the position corresponding to the first support body 711. Of course, the structure of forming the drainage recess 236 at the position of the first support body 711 enables the entire water collection tank 235 to be discharged from the end drainage port to the water storage tank 231, and a drainage path can be further added in the middle of the water collection tank 235, and it can be directly discharged into the water receiving tray 30. That is, this part of the design has the advantage of less material after the first support body 711 is hollowed out, and can also accelerate the condensed water discharge efficiency in the water collection tank 235, which has multiple advantages.

[0108] The support seat 71 of the present application is further abutted against the heat exchanger 60 on the premise of realizing the installation of the connecting component 72. Specifically, the second support body 712 abuts against 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 preventing the heat exchanger 60 from being deformed due to stress concentration in the middle position due to factors such as vibration due to a large span.

[0109] Please refer to Fig.13 In the case where 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. Then the condensed water in the water collection tank 235 can be discharged to the heat exchanger 60 through the drainage recess 236, the drainage hole 238 and the drainage channel 713 in sequence, and the condensed water can be further discharged to the water receiving tray 30 through the drainage of the heat exchanger 60, that is, the outlet of the drainage channel 713 of the present application can be set on the surface of the second support body 712 that contacts the heat exchanger 60. It can be understood that in other settings, the outlet of the drainage channel 713 can also be set on the surface of the second support body 712 that does not contact the heat exchanger 60.

[0110] 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 may further install a buffer 73 on the surface of the support seat 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. Among them, the buffer 73 can be made of materials such as sponge, silicone, etc. 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 penetrating through its two surfaces can be further formed on the buffer 73, and the avoidance hole is connected to the outlet of the drainage channel 713.

[0111] From the above, we can understand that the multiple effects of fixing the heat exchanger 60 and draining and diverting are achieved through the setting of the support structure 70. Here, it should also be emphasized that the heat exchanger 60 is supported by the support structure 70, and the heat exchanger 60 also achieves the supporting effect of the support structure 70 in reverse, so that the heat exchanger 60 bears the weight of the connecting component 72 (bearing), so that the volute 20 can share the load at the corresponding position of the support structure 70 because of the support of the heat exchanger 60, and the volute 20 with a thin-walled structure has the effect of not being easily deformed, that is, the support structure 70 realizes two-way support.

[0112] As mentioned above, the heat exchanger 60 is disposed between the second portion 25 and the water receiving pan 30, and the upper side and the lower side of the heat exchanger 60 are respectively connected to the second portion 25 and the water receiving pan 30. In order to achieve the support effect of the heat exchanger 60 on the volute 20 through the support structure 70, please refer to Figure 2 In one implementation form, a slot 251 may be formed on the second part 25, and the notch of the slot 251 is toward the side of the wind wheel 50 and toward the bottom, and 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 tray 30, and the boss has an inclined supporting surface, which faces the notch of the slot 251. In this way, the two structures of the water receiving tray 30 and the second part 25 realize the clamping and limiting of the heat exchanger 60, and realize the stopping effect of 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. In this way, 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. In this way, the structure of the entire air-conditioning indoor unit 1 is relatively stable, and the heat exchanger 60 can almost eliminate the need for connecting parts during the installation process, thereby greatly improving the assembly efficiency.

[0113] Please refer to Figure 6 and Figure 7 as well as Fig.14 and Fig.15In one embodiment, the first part 24 includes a wind rotor bracket 241 and a motor bracket 242. The motor bracket 242 is connected to one end of the wind rotor bracket 241 in the axial direction of the wind rotor 50 and is used to install the drive motor 40. The first slot portion 232 is arranged on the side of the wind rotor bracket 241 away from the motor bracket 242, and the second slot portion 233 surrounds the periphery of the motor bracket 242. It can be understood that the rotating shaft of the wind rotor 50 is rotatably connected to the wind rotor bracket 241 toward one end of the first slot portion 232. Usually, a bearing is installed between the wind rotor bracket 241 and the rotating shaft. The bearing is used to reduce friction and prevent the rotating shaft from wearing the structure of the wind rotor bracket 241 during the rotation of the wind rotor 50. Then, the wind rotor bracket 241 needs to be provided with a mounting portion 243 in the form of a boss at the position corresponding to the bearing, and the bearing is fixed in the mounting portion 243, wherein the mounting portion 243 is axially protruding outward and there is a gap with the periphery of the wind rotor bracket 241. The first groove body portion 232 of the present application is formed just below the mounting portion 243. In order to achieve a higher production efficiency of the volute 20, the present application may be a case where the volute 20 is made of plastic material, and the overall structure is formed by an integral injection molding method. On this basis, since the first groove body portion 232 is arranged below the mounting portion 243, if the first groove body portion 232 is formed as a whole during the integral molding process of the volute 20, then because there is a mounting portion 243 above it, it will be relatively difficult to demould during the injection molding production process, or the mold design will be relatively complicated.

[0114] 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 with the wind rotor bracket 241 to form a part of the first slot body portion 232. Specifically, the seal 80 is in the shape of a long strip as a whole, and it can be made of plastic, rubber and other materials. The seal 80 and the wind rotor bracket 241 can be fixedly connected together by bonding, welding and other methods. In this embodiment, by providing a seal 80, the seal 80 replaces a part 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 slot body portion 232 in a relatively low cost form.

[0115] In this embodiment, the motor bracket 242 is integrally formed with the wind wheel bracket 241, and the air conditioner indoor unit 1 further includes a fixed bracket 244 detachably connected to the motor bracket 242. The fixed bracket 244 and the motor bracket 242 enclose an installation cavity for installing the drive motor 40, and the drive motor 40 is limited in the installation cavity. Among them, the detachable connection method between the fixed bracket 244 and the motor bracket 242 includes but is not limited to one of the methods such as screw connection and snap connection. By setting the fixed bracket 244 and the motor bracket 242 in a detachable connection, the disassembly and assembly operation of the drive motor 40 is more convenient.

[0116] Further, please refer 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 arranged to connect the outside world and the heat exchange duct a. Therefore, during the operation of the air conditioner indoor unit 1, the air flow in the heat exchange duct a is driven by the wind wheel 50 to flow and generate negative pressure, which can cause the air flow in the heat dissipation duct b, so that the outside air can enter the heat dissipation duct b and quickly take away the heat emitted by the drive motor 40, so that the temperature of the wall drive motor 40 is too high when it runs for a long time, so that the stability of the air conditioner indoor unit 1 during long-term operation can be improved.

[0117] In this embodiment, an air inlet b1 connected to the outside and the heat dissipation duct b is provided on the housing 10, and the position where the air outlet b2 connected to the heat dissipation duct b is connected to the heat exchange duct a can be relatively flexibly set. For example, the air outlet can be connected to the cavity of the heat exchange duct a located 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 located between the heat exchanger 60 and the return air port (such as Fig.18 As indicated by the dotted line Q in the figure, the air outlet of the heat dissipation flow path Q is connected to the heat exchange air duct a (a cavity located between the heat exchanger 60 and the return air outlet), and the present application does not impose any limitation on this.

[0118] The heat exchange air duct a and the heat dissipation air duct b both extend along the XX direction and are arranged side by side in the YY direction. This arrangement can make full use of the space in the air conditioner indoor unit 1 without causing an increase in the overall volume. Specifically, since the motor bracket 242 is connected to one end of the wind wheel bracket 241 along the axial direction of the wind wheel 50, and the second part 25, the heat exchanger 60 and the part of the water receiving tray 30 located below the heat exchanger 60 on the side facing the motor bracket 242 and the inner wall of the housing 10 form the heat dissipation air duct b, the above-mentioned air outlet can also be formed by the second part 25, the heat exchanger 60 and the part of the water receiving tray 30 located below the heat exchanger 60 on the side facing the motor bracket 242. In this way, the drive motor 40 can be reasonably placed in the heat dissipation air duct b, and the heat dissipation of the drive motor 40 is also achieved without changing the original layout.

[0119] In order to improve the heat dissipation effect of the drive motor 40, the present application may further provide heat dissipation holes on the motor bracket 242 and / or the fixed bracket 244, the heat dissipation holes are connected to the space formed by the fixed bracket 244 and the motor bracket 242, and a plurality of heat dissipation holes are provided, so that 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 can be understood that in order to improve the heat dissipation efficiency, the present application may provide heat dissipation holes on both the fixed bracket 244 and the motor bracket 242, and a water retaining edge needs to be formed around the heat dissipation to prevent condensed water from entering therein.

[0120] 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 air insulation chamber c mainly functions to block the heat or cold of the volute 20 from being dissipated toward the box body 11. Therefore, such an effect can be achieved 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 airflow caused by this is relatively small, so the effect of the air insulation chamber c can still be guaranteed.

[0121] Furthermore, the heat dissipation duct b may also be connected to the air insulation chamber c, or a partition may be provided on the back side 22 to separate the two. When connected, since the heat dissipation duct b itself has an air inlet b1 connected to the outside, the main airflow in the heat dissipation duct b comes from the outside, and the airflow that causes the air insulation chamber c to flow is relatively small, so the air insulation chamber c can still ensure its 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 side 22 of the volute 20, the temperature is relatively low. When a small portion of the low-temperature airflow flowing out of the air insulation chamber c flows through the drive motor 40, the heat dissipation effect can be further improved.

[0122] The above description is only an optional embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An air conditioner indoor unit, characterized in that: include: A shell having a heat exchange air duct formed therein, the shell comprising a box body and a volute, the volute is disposed in the box body and connected to the box body, and the volute defines an upper part of the 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 comprises an air duct surface and a back surface which are arranged opposite to each other, the air duct surface forms the upper part of the air duct wall surface 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 conditioner indoor unit according to claim 1, characterized in that: 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, characterized in that: It also includes a support member, which is supported between the back side of the volute and the inner wall surface of the box body.

4. The air conditioner indoor unit according to claim 3, characterized in that: 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 conditioner indoor unit according to claim 3, characterized in that: A reinforcement portion is provided at a position where the box body contacts the support member.

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

7. The air conditioner indoor unit according to claim 6, characterized in that: A fixing portion is also provided on the back side of the volute tongue portion, and a locking portion is also 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 conditioner indoor unit according to claim 7, characterized in that: The box body is provided with a convex structure at a position corresponding to the volute tongue portion, the fixing portion is a threaded column protruding from the back side of the volute tongue portion, and the locking portion is a locking hole opened on the convex structure.

9. The air conditioner indoor unit according to claim 6, characterized in that: 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 with a connecting flange extending toward the inside 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 arranged on the step portion.

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

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

12. The air conditioner indoor unit according to claim 11, characterized in that: 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 conditioner indoor unit according to any one of claims 1 to 10, characterized in that: It also includes a drive motor and a water receiving tray, the water receiving tray is located in the box body, the volute includes a side surface located on the same side of the air duct surface and the back surface, the drive motor is installed on the side surface of the volute, the side surface of the volute, the inner wall surface of the box body, the water receiving tray and the side surface of the heat exchanger also enclose a heat dissipation duct, and the drive motor is located in the heat dissipation duct; Wherein, the heat dissipation duct is communicated with the air insulation cavity.

14. The air conditioner indoor unit according to claim 13, characterized in that: The heat dissipation air duct further includes an air inlet and an air outlet. The air inlet is disposed on the box body and communicates with the outside, and the air outlet communicates with the heat exchange air duct.

15. A HVAC equipment, characterized in that: It comprises an air-conditioning indoor unit as described in any one of claims 1 to 14.

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