Heating and ventilation indoor unit and heating and ventilation system

Abstract

The invention discloses a heating and ventilation indoor unit and a heating and ventilation system. The heating and ventilation indoor unit comprises a first box body, a second box body, a partition plate, a mounting frame and a centrifugal fan. The second box body is connected with the first box body, and the partition plate is arranged between the first box body and the second box body; the mounting frame is arranged in the first box body; the centrifugal fan is arranged in the first box body and comprises a volute, an impeller and a flange, the volute is installed on the installation frame and penetrates through the partition plate, the impeller is contained in the volute, and the flange is arranged on the volute and abuts against the partition plate. In this way, the gravity center of the volute is close to the installation position, and therefore the downward pulling force borne by the volute is reduced. Therefore, after installation, the position of the volute is not prone to deviation, the position stability of the volute is improved, the anti-seismic performance of the volute is improved, the position of the impeller in the volute is not prone to deviation, and therefore the wind field noise of the centrifugal fan area can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to a HVAC indoor unit and a HVAC system. Background Art

[0002] The HVAC indoor unit includes a centrifugal fan and a partition. The partition is used to isolate the centrifugal fan from the indoor heat exchanger. In the related art, the flange is installed on the partition through a fastening element to fix the volute of the centrifugal fan. However, after installation in this way, the center of gravity of the volute is offset relative to the flange, and most of the volume of the volute is located on one side of the flange, which causes the volute fixed by the flange to generate a downward pulling force on the fixing point under the action of gravity. In addition, during the operation of the HVAC indoor unit, the HVAC indoor unit will vibrate, which will aggravate the pulling effect, causing the position of the volute to shift, and causing the position of the impeller of the centrifugal fan in the volute to shift, thereby increasing the wind field noise in the centrifugal fan area. Summary of the invention

[0003] The present invention provides a HVAC indoor unit and a HVAC system to solve at least one of the above-mentioned technical problems.

[0004] The HVAC indoor unit according to the embodiment of the present invention comprises:

[0005] The first box;

[0006] A second box body is connected to the first box body,

[0007] a partition, the partition being arranged between the first box body and the second box body;

[0008] A mounting frame, the mounting frame is disposed in the first box;

[0009] A centrifugal fan is arranged in the first housing, and comprises a volute, an impeller and a flange. The volute is mounted on the mounting frame and penetrates the partition. The impeller is accommodated in the volute. The flange is arranged on the volute and abuts against the partition.

[0010] In the above-mentioned HVAC indoor unit, since the volute is installed on the mounting frame and the partition and the flange are in contact, the center of gravity of the volute is relatively close to the mounting position, thereby reducing the downward pulling force on the volute. Therefore, after installation, the position of the volute is not easy to shift, which improves the position stability of the volute, thereby improving the anti-seismic performance of the volute, and the position of the impeller in the volute is not easy to shift, thereby reducing the wind field noise in the centrifugal fan area. In addition, the abutment design of the partition and the flange can also ensure the sealing performance between the flange and the partition, making it difficult for the airflow to leak.

[0011] In certain embodiments, the partition is provided with a through hole, and the outer contour size of the flange is larger than the size of the through hole.

[0012] In some embodiments, the flange is in contact with the partition.

[0013] In some embodiments, a seal is provided between the flange and the partition.

[0014] In certain embodiments, the mounting frame includes two cross beams spaced apart from each other, and the volute is mounted on the two cross beams.

[0015] In some embodiments, the volute includes a support foot, the support foot rests on the cross beam, and the support foot is fixedly connected to the cross beam via a fastening element.

[0016] In some embodiments, the HVAC indoor unit further includes a motor, which is mounted on the mounting frame, and an output shaft of the motor is connected to the impeller.

[0017] In some embodiments, the motor and the centrifugal fan are mounted on the same plane of the mounting frame.

[0018] In certain embodiments, the mounting frame includes a mounting plate and a bearing portion arched from the mounting plate, the bearing portion includes a bearing surface, and the motor and the centrifugal fan are mounted on the bearing surface.

[0019] In some embodiments, the number of the centrifugal fans is two, the two centrifugal fans are arranged in parallel and spaced apart, the motor is arranged between the two centrifugal fans, and the motor is used to drive the impellers of the two centrifugal fans to rotate simultaneously.

[0020] In some embodiments, the first housing includes a chassis, and the mounting frame is disposed on the chassis.

[0021] In certain embodiments, the volute comprises:

[0022] Two side panels arranged opposite to each other;

[0023] The enclosure is arranged between the two side panels, the two side panels are detachably connected to the enclosure, and the flange is arranged around the two side panels and the enclosure.

[0024] In some embodiments, the flange includes a first docking portion and a second docking portion, the first docking portion is fixedly connected to the side panel, the second docking portion is detachably connected to the two first docking portions, and the first docking portion and the second docking portion are both abutted against the partition.

[0025] In some embodiments, the first docking portion and the side panel are an integrally formed structure.

[0026] In some embodiments, the first docking portion is provided with an inserting groove, and an end portion of the second docking portion is inserted into the inserting groove.

[0027] In some embodiments, one of the slot wall of the plug slot and the end of the second docking portion is provided with a clamping slot, and the other is provided with a clamping block, and the clamping block is clamped in the clamping slot.

[0028] In some embodiments, the plug-in slot has an insertion opening, the insertion opening is arranged away from the side panel, and the second docking portion is used to be inserted into the plug-in slot through the insertion opening.

[0029] In some embodiments, the first docking portion is provided with a first limiting portion, and both ends of the second docking portion are provided with a second limiting portion, and the first limiting portion and the second limiting portion are cooperatively connected to limit the two side panels from moving away from each other.

[0030] In some embodiments, the first limiting portion includes a first limiting piece, the second limiting portion includes a second limiting piece, the first limiting piece abuts against the second limiting piece, and two first limiting pieces are located between two second limiting pieces.

[0031] In certain embodiments, the side panels are plastic panels, and the enclosure panels are metal panels.

[0032] In some embodiments, the flange further includes a third docking portion detachably connected to the first docking portion, and the third docking portion and the second docking portion are respectively located on opposite sides of the volute.

[0033] In some embodiments, the HVAC indoor unit further includes an indoor heat exchanger, and the indoor heat exchanger is disposed in the second box, and the first box is detachably connected to the second box.

[0034] In some embodiments, the partition is fixedly connected to the first box.

[0035] The HVAC system according to the embodiment of the present invention includes the HVAC indoor unit described in any one of the above embodiments.

[0036] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0038] Figure 1 is a schematic structural diagram of a HVAC indoor unit according to an embodiment of the present invention;

[0039] Figure 2 is a schematic structural diagram of a centrifugal fan according to an embodiment of the present invention;

[0040] Figure 3 is a schematic structural diagram of a panel and a third docking portion according to an embodiment of the present invention;

[0041] Figure 4 It is a partial structural schematic diagram of a centrifugal fan according to an embodiment of the present invention;

[0042] Figure 5 It is another partial structural schematic diagram of a centrifugal fan according to an embodiment of the present invention;

[0043] Figure 6 yes Figure 5 An enlarged view of part b of the centrifugal fan;

[0044] Figure 7 yes Figure 4 An enlarged view of part d of the centrifugal fan;

[0045] Figure 8 yes Figure 5 A cross-sectional view of the centrifugal fan in the AA direction;

[0046] Fig. 9 yes Figure 8 An enlarged view of part a of the centrifugal fan;

[0047] Fig.10 yes Figure 5 A cross-sectional view of the centrifugal fan in the BB direction;

[0048] Fig.11 yes Fig.10 An enlarged view of part c of the centrifugal fan;

[0049] Fig.12 yes Figure 5 The cross-sectional view of the centrifugal fan in the CC direction;

[0050] Fig.13 yes Figure 2 The enlarged view of the h part of the centrifugal fan;

[0051] Fig.14 yes Figure 2 An enlarged view of part j of the centrifugal fan;

[0052] Fig.15 is another partial structural schematic diagram of a centrifugal fan according to an embodiment of the present invention;

[0053] Fig.16It is another partial structural schematic diagram of the centrifugal fan according to the embodiment of the present invention;

[0054] Fig.17 yes Figure 4 An enlarged view of part e of the centrifugal fan;

[0055] Fig.18 is a partial structural schematic diagram of a side plate according to an embodiment of the present invention;

[0056] Fig.19 is a schematic structural diagram of a side plate according to an embodiment of the present invention;

[0057] Fig. 20 yes Fig.19 An enlarged view of part k of the side plate;

[0058] Fig.21 yes Figure 4 An enlarged view of part f of the centrifugal fan;

[0059] Fig. 22 It is another partial structural schematic diagram of the centrifugal fan according to the embodiment of the present invention;

[0060] Fig.23 yes Fig. 22 An enlarged view of part g of the centrifugal fan;

[0061] Fig.24 is another structural schematic diagram of a side panel according to an embodiment of the present invention;

[0062] Fig.25 yes Fig.24 An enlarged view of part m of the side panel;

[0063] Fig.26 is a schematic structural diagram of a second docking portion according to an embodiment of the present invention;

[0064] Fig. 27 is a schematic structural diagram of a third docking portion according to an embodiment of the present invention;

[0065] Fig.28 yes Fig.24 An enlarged view of part n of the side panel;

[0066] Fig.29 yes Fig.16 An enlarged view of part P of the centrifugal fan;

[0067] Fig.30 is another structural schematic diagram of a HVAC indoor unit according to an embodiment of the present invention;

[0068] Fig.31 is a schematic structural diagram of a HVAC system according to an embodiment of the present invention;

[0069] Fig.32It is a partial structural schematic diagram of a HVAC indoor unit according to an embodiment of the present invention;

[0070] Fig.33 It is another partial structural schematic diagram of the HVAC indoor unit according to the embodiment of the present invention;

[0071] Fig.34 is another partial structural schematic diagram of the HVAC indoor unit according to the embodiment of the present invention;

[0072] Fig.35 yes Fig.34 A cross-sectional view of the HVAC indoor unit in the II direction;

[0073] Fig.36 yes Fig.35 An enlarged view of the s part of the HVAC indoor unit;

[0074] Fig.37 It is another partial structural schematic diagram of the HVAC indoor unit according to the embodiment of the present invention;

[0075] Fig.38 It is another partial structural schematic diagram of the HVAC indoor unit according to the embodiment of the present invention;

[0076] Fig.39 yes Fig.35 Enlarged view of part t of the HVAC indoor unit;

[0077] Fig.40 It is another partial structural schematic diagram of the HVAC indoor unit according to the embodiment of the present invention.

[0078] Description of reference numerals:

[0079] HVAC system 2000; HVAC indoor unit 2100; first box 310; second box 410; indoor heat exchanger 420; HVAC outdoor unit 2200; pipeline 2300; compressor 500; flow path switching device 600; outdoor heat exchanger 700; expansion valve 800; volute 100; side plate 10; enclosure 20; volute profile 3001; fastening portion 3002; mounting hole 3003; adapter hole 3004; air outlet area 3005; air suction area 3006; proximal volute tongue wall 3007; distal volute tongue wall 3008; first connecting portion 3009; second connecting portion 3010; third connecting portion 3011; inner surface 3012 of the first connecting portion; first lap groove 301 3; the inner surface 3014 of the second connecting part; the second lap groove 3015; the first base plate 3016; the second base plate 3017; the fourth connecting part 3018; the top surface 3019 of the support foot; the convex strip 3020; the first guide surface 3021; ​​the support plane 3022; the first supporting part 3023; the second supporting part 3024; the base 3025; the elastic claw 3026; the first end 3027 of the elastic claw; the second end 3028 of the elastic claw; the disassembly port 3029; the outer peripheral surface 3030 of the far volute tongue wall; the outer peripheral surface 3031 of the air suction area; the abutment wall 3032; the docking wall 3033; the first elastic cantilever 3034; the third docking part 3035; the second card slot 3036; the second card block 3037; second elastic cantilever 3038; third limiting portion 3039; fourth limiting portion 3040; third limiting piece 3041; fourth limiting piece 3042; first convex 3043; first curved surface 3044; second convex 3045; second curved surface 3046; profile groove 3047; temperature sensing package 3048; second guide surface 3049; air inlet 11; guide ring 30; base plate 12; connecting portion 13; top surface 21 of the enclosure; boss 130; mounting plane 1300; retaining edge 14; gap 15; supporting protrusion 16; supporting surface 160; guiding surface 161; snail tongue 22; air outlet 24; recessed portion 25; sink 26; support foot 40; mounting seat 50; mounting space 51; through hole 41; support bar 42; wire holder 60; wire holder slot 61; flange 70; first docking portion 71; second docking portion 72; plug-in slot 710; first card slot 7100; first card block 720; plug-in port 7101; first limiting portion 711; second limiting portion 721; first limiting plate 7110; second limiting plate 7210; centrifugal fan 1000; impeller 200; wheel disc 201; blade 202; partition 2001; chassis 2003; mounting frame 2004; through hole 2005; seal 2006; crossbeam 2007; motor 2008; output shaft 2009 of motor; mounting plate 2010; bearing portion 2011; bearing surface 2012. DETAILED DESCRIPTION

[0080] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0081] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0082] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0083] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0084] The disclosure below provides many different embodiments or examples to realize different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplicity and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0085] Please refer to Figure 1 The HVAC indoor unit 2100 of the embodiment of the present invention includes the centrifugal fan 1000 of the above embodiment. The HVAC indoor unit 2100 is a device for adjusting the temperature of air. One HVAC indoor unit 2100 may include one or more centrifugal fans 1000. As an example, one HVAC indoor unit 2100 may include two centrifugal fans 1000. The two centrifugal fans 1000 may be arranged at intervals along the length direction of the HVAC indoor unit 2100.

[0086] Please refer to Figure 1 and Figure 2 The centrifugal fan 1000 of the embodiment of the present invention includes a volute 100 and an impeller 200. The impeller 200 is accommodated in the volute 100. Thus, the impeller 200 generates airflow by rotating, sucking air or other gas into the volute 100, and then being discharged from the volute 100 after being accelerated by the impeller 200.

[0087] Specifically, the impeller 200 is a rotating component in the HVAC indoor unit 2100. The rotation of the impeller 200 can be driven by a motor. The volute 100 can be used to guide the airflow and improve the gas flow efficiency. In the HVAC indoor unit 2100, the volute 100 can be a housing part of the centrifugal fan 1000.

[0088] Please refer to Figure 2 In some embodiments, the impeller 200 includes a wheel disc 201 and a plurality of blades 202, and the plurality of blades 202 are arranged on the wheel disc 201 at intervals along the circumference of the wheel disc 201. Thus, the impeller 200 is composed of the wheel disc 201 and the plurality of blades 202 arranged at intervals along the circumference of the wheel disc 201. This design helps to more effectively generate and accelerate airflow, thereby improving the airflow efficiency of the centrifugal fan 1000. The blades 202 and the wheel disc 201 can be integrally formed, or they can be manufactured separately and then assembled by welding, threaded connection, etc.

[0089] Please refer to Figure 2 , Figure 3 and Figure 4The volute 100 of the embodiment of the present invention includes a circumferential plate 20 and two side plates 10 arranged opposite to each other. The circumferential plate 20 extends to form a volute profile 3001. The two side plates 10 arranged opposite to each other are respectively connected to the two sides of the circumferential plate 20, and at least one side plate 10 is provided with an air inlet 11; wherein at least one side plate 10 is detachably connected to the circumferential plate 20, at least one side plate 10 is made of a first material, and the circumferential plate 20 is made of a second material, and the density of the first material is less than the density of the second material.

[0090] In the volute 100 of the embodiment of the present invention, when the side plate 10 and the apron 20 are both made of a material with a higher density, the weight of the volute 100 is relatively large, which makes the transportation cost and installation cost of the volute 100 relatively high. When the side plate 10 and the apron 20 are both made of a material with a lower density, the weight of the volute 100 is relatively small, but since the material with a lower density usually has a complicated manufacturing process, the manufacturing cost of the volute 100 is relatively high. Therefore, under the same volume, by making at least one side plate 10 of a first material with a lower density, the volute 100 can take into account the advantages of light weight and low cost, that is, when the weight is small, the transportation cost, installation cost and manufacturing cost of the volute 100 are relatively low. In addition, since the apron 20 is made of a second material with a higher density, the overall structural strength of the volute 100 can still meet the requirements. By arranging the air inlet 11 on the side plate 10, the air flow into the volute 100 can be more effectively controlled and guided, so that the air flow inside the volute 100 can be increased, thereby improving the heat dissipation efficiency.

[0091] In addition, the detachable connection design allows the side panels 10 and the enclosure 20 of the volute 100 to be separately produced in batches and then assembled. This modular production method can improve production efficiency and reduce the complexity and cost of the production process. At the same time, the detachable design of the side panels 10 and the enclosure 20 also facilitates later maintenance and replacement, improves assembly efficiency, and increases the size adaptability of the volute 100. When the size of the volute 100 needs to be changed, it is only necessary to change the width of the enclosure 20. In other words, enclosures 20 of different widths are adapted to the same side panels 10. Therefore, the size adaptability of the volute 100 design of the present application is improved, and all parts do not need to be re-molded, reducing production costs and production time.

[0092] Specifically, the side panels 10 may be flat plate structures constituting both sides of the volute 100. The side panels 10 may be used to provide support and enclosure. The two side panels 10 may be arranged opposite to each other along the length direction and the width direction of the volute 100. As an example, the two side panels 10 may be spaced apart from each other, and the two side panels 10 may be arranged opposite to each other along the length direction of the volute 100.

[0093] The enclosure 20 can be used to fix and connect the two side panels 10. The connection between the enclosure 20 and the side panels 10 can be a detachable connection such as a threaded connection or a snap connection.

[0094] Density refers to the mass per unit volume of a material. The density of the side panel 10 is less than that of the enclosure 20, which means that the material used for the side panel 10 is lighter than that of the enclosure 20. The first material can be a material with a lower density, such as ABS (Acrylonitrile Butadiene Styrene) plastic, polypropylene or carbon fiber reinforced plastic. The second material can be a material with a higher density, such as stainless steel, aluminum plate or galvanized iron plate.

[0095] The air inlet 11 refers to an opening provided on the side plate 10, and the air inlet 11 can serve as an entrance for airflow to enter the interior of the volute 100. The shape of the air inlet 11 can be a regular shape such as a circle or a square, or an irregular shape. One air inlet 11 can be provided on the side plate 10. The air inlet 11 can be provided in the middle part of the side plate 10. A plurality of air inlets 11 can also be provided on the side plate 10. The number of air inlets 11 can be two, three, four or even more.

[0096] Please refer to Figure 4 In some embodiments, both side panels 10 are provided with air inlets 11, and the two air inlets 11 are coaxially arranged.

[0097] In this way, the two coaxially arranged air inlets 11 can allow air to enter evenly from both sides, thereby reducing airflow deflection and eddy currents.

[0098] Specifically, the coaxial arrangement means that the centers of the two air inlets 11 are located on the same axis.

[0099] In certain embodiments, the first material is plastic and the second material is metal.

[0100] Compared with plastic, metal materials have a higher density. When the side panels 10 and the enclosure 20 are made of metal materials, the weight of the volute 100 is large, which makes the transportation cost and installation cost of the volute 100 high. When the side panels 10 and the enclosure 20 are made of plastic materials, the weight of the volute 100 is small, but the manufacturing cost of the volute 100 is high. Therefore, under the same volume, by making at least one side panel 10 of a first material with a smaller density, for example, the side panel 10 is made of a plastic material and the enclosure 20 is made of a metal material, the weight of the volute 100 is small, the manufacturing cost is relatively low, and the transportation cost and installation cost of the volute 100 can be reduced. In addition, since the enclosure 20 is a metal plate, the overall structural strength of the volute 100 can still meet the requirements.

[0101] Please refer to Figure 2 and Figure 4 In some embodiments, each side plate 10 has a base plate 12 configured as an outer side of the volute 100 , and the side plate 10 made of the first material has a connecting portion 13 , which extends from the base plate 12 toward the other side plate 10 and is detachably overlapped on the edge of the enclosure 20 .

[0102] In this way, the connection portion 13 can be detachably overlapped on the edge of the enclosure 20, and this design can enhance the connection strength between the side panel 10 and the enclosure 20. The connection portion 13 structure provides additional contact area and support, making the connection more stable. In addition, the connection portion 13 can also be used as an assembly reference, so as to facilitate the alignment of the side panel 10 and the enclosure 20 during the assembly process, thereby reducing the gap between the side panel 10 and the enclosure 20, thereby reducing the risk of airflow leakage and reducing noise.

[0103] Specifically, the base plate 12 may be a main part of the side plate 10. The connecting portion 13 may be formed at the edge of the base plate 12 by folding, injection molding, or the like.

[0104] Please refer to Figure 2 and Figure 5 In some embodiments, the two side plates 10 are configured to be mirror-symmetrical, so as to facilitate the processing and forming of the entire volute 100.

[0105] Please refer to Figure 4 , Figure 5 , Figure 6 , Figure 7 and Fig.12 In some embodiments, the connection portion 13 extends in the circumferential direction r along the volute profile 3001 , and the connection portion 13 has a plurality of fastening portions 3002 arranged at intervals along the circumferential extension track, and the plurality of fastening portions 3002 are detachably connected to the edge of the enclosure 20 .

[0106] In this way, the fastening part 3002 can enhance the connection reliability between the side plate 10 and the enclosure 20, increase the rigidity of the entire volute 100 structure, and reduce structural deformation caused by vibration or external impact during operation. By providing multiple fastening parts 3002 on the connecting part 13 and arranging them at intervals along the circumferential direction, the connection stability between the side plate 10 and the enclosure 20 can be enhanced. This multi-point connection method provides more fixing points, making the entire volute 100 structure more stable.

[0107] Specifically, the connection portion 13 may extend continuously and integrally along the circumference of the volute profile 3001. The connection portion 13 may also extend discontinuously along the circumference of the volute profile 3001. For example, along the circumference of the volute profile 3001, the connection portion 13 may be divided into three sections, with intervals between two adjacent sections.

[0108] The connection part 13 and the enclosure 20 may be provided with corresponding threaded holes, rivet holes, etc. The fastening part 3002 is a part used to fix the side panel 10 and the enclosure 20. The fastening part 3002 may include structures such as threaded holes and rivet holes to achieve the fixation of the side panel 10 and the enclosure 20 with mechanical elements such as screws, bolts or rivets. For example, the connection part 13 and the enclosure 20 may be provided with a plurality of corresponding threaded holes, and bolts may be used to penetrate these threaded holes to achieve the fastening of the side panel 10 and the enclosure 20. The fastening part 3002 may also be a welding area, and the fixation of the side panel 10 and the enclosure 20 is achieved by welding.

[0109] Please refer to Figure 5 , Figure 8 and Fig. 9 In some embodiments, the side plate 10 made of the first material is provided with a retaining edge 14 opposite to the connecting portion 13 , a gap 15 is formed between the retaining edge 14 and the connecting portion 13 , and an edge portion of the enclosure 20 is inserted into the gap 15 .

[0110] In this way, this design provides additional support and fixation for the enclosure 20 through the coordinated use of the retaining edge 14 and the connecting portion 13, thereby enhancing the stability of the entire volute 100 structure. At the same time, the retaining edge 14 can also be used to block the airflow to prevent the airflow inside the volute 100 from leaking out. In addition, the gap 15 formed by the retaining edge 14 and the connecting portion 13 can serve as a guide for the insertion of the enclosure 20, thereby improving the accuracy of the assembly of the enclosure 20 and the side panel 10, ensuring that the enclosure 20 and the side panel 10 are correctly aligned and fixed, and reducing assembly errors, thereby reducing the gap between the side panel 10 and the enclosure 20, thereby reducing the risk of airflow leakage and reducing noise.

[0111] Specifically, the rib 14 and the base plate 12 can be integrally formed. For example, the rib 14 and the base plate 12 can be formed by injection molding. The rib 14 and the base plate 12 can also be manufactured separately and then assembled. For example, the rib 14 and the base plate 12 can be processed separately and then assembled by bonding.

[0112] Please refer to Fig.10 and Fig.11 In some embodiments, a support protrusion 16 is provided on the retaining edge 14 , and the support protrusion 16 is located in the gap 15 , and the support protrusion 16 abuts against the edge of the enclosure 20 .

[0113] Thus, the support protrusion 16 provides an additional support point, which enhances the support strength of the volute 100 structure. The presence of the support protrusion 16 makes the connection between the rib 14 and the enclosure 20 more stable, reduces the displacement caused by external force or vibration, and thus improves the stability of the entire volute 100 structure.

[0114] Specifically, the support protrusion 16 can be protruded on one side of the rib 14 along the direction of the rib 14 toward the enclosure 20. The rib 14 and the support protrusion 16 can be integrally formed. For example, the rib 14 and the support protrusion 16 can be formed by injection molding. The rib 14 and the support protrusion 16 can also be manufactured separately and then assembled. For example, the rib 14 and the support protrusion 16 can be processed separately and then assembled by bonding or welding.

[0115] Please refer to Figure 5 , Figure 8 and Fig. 9 In some embodiments, the support protrusion 16 includes a support surface 160 and a guide surface 161 connected to the support surface 160 , the support surface 160 is connected to the substrate 12 , and along the direction e toward the substrate 12 , the distance between the guide surface 161 and the connection portion 13 decreases.

[0116] In this way, the distance between the guide surface 161 and the connecting portion 13 decreases along the direction e toward the substrate 12. This design forms a progressive guiding structure, which helps to guide the edge of the enclosure 20 to smoothly enter the gap 15, reducing the resistance and alignment difficulty during the assembly process, so that the edge of the enclosure 20 can be more smoothly inserted into the gap 15 during the assembly process.

[0117] Specifically, the support surface 160 is used to support the enclosure 20. The guide surface 161 is used to guide the enclosure 20 to move to the support surface 160. Along the height direction of the volute 100, the support surface 160 can be located above the side of the guide surface 161. Along the direction e toward the base plate 12, the distance between the guide surface 161 and the connecting portion 13 decreases from D3 to D4. Among them, D3 is the distance between the end of the guide surface 161 away from the base plate 12 and the connecting portion 13, and D4 is the distance between the end of the guide surface 161 close to the base plate 12 and the connecting portion 13.

[0118] Please refer to Figure 8 and Fig. 9 In some embodiments, along the thickness direction d of the substrate 12 , a dimension D1 of the connecting portion 13 is greater than a dimension D2 of the rib 14 .

[0119] Thus, since the dimension D1 of the connection portion 13 is larger than the dimension D2 of the rib 14, the enclosure 20 is easily inserted into the gap 15 during assembly. In addition, the dimension D2 of the rib 14 is relatively small, so the required material consumption is small, which is conducive to reducing manufacturing costs.

[0120] Specifically, the thickness direction d of the substrate 12 refers to a vertical distance from one side to the other side of the substrate 12 .

[0121] Please refer to Figure 8 and Fig. 9In some embodiments, the distance between the support surface 160 and the connecting portion 13 is the same everywhere.

[0122] In this way, the distance between the supporting surface 160 and the connecting portion 13 is equal everywhere. This design ensures that the supporting force of the supporting protrusion 16 on the enclosure 20 is evenly distributed, reduces local stress concentration, and thus improves the durability and reliability of the structure.

[0123] Specifically, the distance between the support surface 160 and the connection portion 13 refers to the minimum distance between the regions where the support surface 160 and the connection portion 13 are opposite to each other.

[0124] Please refer to Figure 4 and Figure 7 In some embodiments, there are multiple support protrusions 16, and the multiple support protrusions 16 are arranged at intervals along the circumferential direction r of the volute profile 3001.

[0125] In this way, a plurality of supporting protrusions 16 are arranged at intervals in the circumferential direction r along the volute profile 3001. This design allows the supporting force to be evenly distributed around the entire volute 100, thereby improving the overall stability and bearing capacity of the structure.

[0126] Specifically, the number of the supporting protrusions 16 may be two, three, four or even more. The extending direction of the rib 14 may be the same as the circumferential direction r of the volute profile 3001 .

[0127] Please refer to Figure 3 and Figure 7 In some embodiments, the fastening portion 3002 is configured as a boss 130, which is protruded from the side of the connecting portion 13 away from the enclosure 20, and a mounting hole 3003 is penetrated from the top surface 21 of the boss 130 away from the enclosure 20, and the mounting hole 3003 is opposite to the adapter hole 3004 on the edge side of the enclosure 20 for fasteners to pass through and fix.

[0128] In this way, the arrangement of the boss 130 can play a reinforcing role, so that the fastener can provide a stable fastening force to enhance the connection stability between the side panel 10 and the enclosure panel 20 .

[0129] Specifically, the boss 130 may be protruded on one side of the connection portion 13 in a direction away from the enclosure 20. The boss 130 may be integrally formed with the connection portion 13, or may be manufactured separately from the connection portion 13 and then assembled.

[0130] The number of bosses 130 may be multiple, and the multiple bosses 130 may be arranged at intervals. Each boss 130 may be provided with one or more mounting holes 3003. The number of mounting holes 3003 may correspond to the number of adapter holes 3004 one by one. The central axis of the mounting hole 3003 may be colinear with the central axis of the adapter hole 3004. The mounting hole 3003 may be a threaded hole, a rivet hole, etc. The fastener may be a screw, a bolt, or a rivet, etc.

[0131] In certain embodiments, the fastener comprises a rivet.

[0132] In this way, the use of rivets allows the overall structure of the enclosure 20 and the side panel 10 to withstand high loads and repeated mechanical stresses, which enhances the connection strength between the side panel 10 and the enclosure 20. In addition, the rivet connection structure can reduce the relative movement between the side panel 10 and the enclosure 20, reducing the noise caused by vibration.

[0133] Please refer to Figure 6 and Figure 7 In some embodiments, the top surface 21 of the boss 130 facing away from the enclosure 20 is configured to be flat, and the top surface abuts against the head of the fastener. The top surface 21 of the boss 130 facing away from the enclosure 20 may be a mounting plane 1300 .

[0134] During the process of the fastener abutting against the curved surface structure, the top surface may be deformed, which may cause the fastener to fail after long-term use. Therefore, the top surface 21 of the boss 130 facing away from the enclosure 20 is configured to be flat, and the top surface and the head of the fastener are arranged in a face-to-face abutment form, which can reduce the possibility of deformation of the top surface, thereby ensuring the functional stability of the fastener, which helps to reduce the possibility of loosening of the fastener, thereby reducing the noise and structural damage caused by vibration.

[0135] Please refer to Figure 2 , Figure 3 and Fig.12 In some embodiments, the volute profile 3001 is configured to include an air outlet area 3005, an air suction area 3006, and a volute tongue 22 located between the air outlet area 3005 and the air suction area 3006. The air outlet area 3005 includes a near volute tongue wall 3007 and a far volute tongue wall 3008 that are relatively arranged. The near volute tongue wall 3007 is connected to the air suction area 3006 via the volute tongue 22. The air flows through the air inlet 11 and the air suction area 3006 to the air outlet area 3005, and then flows out of the volute 100 from the air outlet area 3005.

[0136] Among them, the connecting part 13 includes a first connecting part 3009, a second connecting part 3010 and a third connecting part 3011. The first connecting part 3009 extends along the contour of the distal volute tongue wall 3008 and is detachably overlapped and fixed to the distal volute tongue wall 3008. The second connecting part 3010 extends along the contour of the proximal volute tongue wall 3007 and is detachably overlapped and fixed to the proximal volute tongue wall 3007. The third connecting part 3011 extends along the contour of the suction area 3006 and is detachably overlapped and fixed to the board wall of the suction area 3006.

[0137] In this way, the connection part 13 is divided into a first connection part 3009, a second connection part 3010 and a third connection part 3011, which extend along the contours of the far volute tongue wall 3008, the near volute tongue wall 3007 and the air suction area 3006, respectively. Such a design makes the connection part 13 more closely fit the contours of the volute 100, thereby enhancing the stability and integrity of the structure. In addition, each connection part 13 is detachably overlapped and fixed with the corresponding part of the volute 100, which makes the assembly and maintenance of the volute 100 more convenient, and any part can be disassembled and replaced separately without disassembling the entire volute 100. The volute tongue 22 can be used to guide and stabilize the airflow. The volute tongue 22 can serve as a transition section from the air suction area 3006 to the air outlet area 3005, thereby stabilizing the transition of the airflow, reducing turbulence and eddies, and improving the overall air outlet efficiency of the volute 100.

[0138] Specifically, the air suction area 3006 can be formed by connecting at least two arc segments and at least one straight line segment. For example, the bottom of the air suction area 3006 can be set as a straight line segment, which can reduce the overall height of the volute 100, thereby being suitable for some installation scenarios with limited height.

[0139] The air outlet area 3005 can be set as a straight line segment inclined downward. Among them, the inclination rate of the near volute tongue wall 3007 can be greater than the inclination rate of the far volute tongue wall 3008. Because the air outlet volume of the area near the near volute tongue wall 3007 is greater than the air outlet volume of the area near the far volute tongue wall 3008, the inclination rate of the near volute tongue wall 3007 can be greater than the inclination rate of the far volute tongue wall 3008, which is beneficial to improve the overall air outlet volume of the volute 100.

[0140] The near volute tongue wall 3007, the far volute tongue wall 3008, the first base plate 3016 and the second base plate 3017 together form an air outlet 24. The shape of the air outlet 24 can be a regular shape such as a circle or a square, or an irregular shape. During the operation of the centrifugal fan 1000, the airflow can enter the volute 100 through the air inlet 11, and then flow along the air suction area 3006 to the air outlet area 3005 under the action of the impeller 200, and flow out of the volute 100 from the air outlet 24.

[0141] Please refer to Figure 2In some embodiments, along the axial direction z of the air inlet 11 , a middle portion of the volute tongue 22 is provided with a recessed portion 25 recessed away from the distal volute tongue wall 3008 .

[0142] During use, the distribution of the airflow flowing out of the volute 100 is uneven, which is specifically manifested in that along the axial direction z of the air inlet 11, the closer to the middle part of the volute tongue 22, the greater the air volume, and the greater the air volume, the faster the air flow rate. Therefore, due to the relatively low position of the recessed portion 25, the flow area at the location of the recessed portion 25 can be effectively expanded, thereby reducing the flow rate of the airflow at the recessed portion 25, and then making the airflow rate at the location of the recessed portion 25 consistent with the airflow rate at the locations of the two sides of the recessed portion 25 on the volute tongue 22, achieving uniform air supply in the air outlet 24 area.

[0143] In this way, under the same working sound, more airflow can pass through the air outlet 24, so the volute 100 can meet the air conditioning of a larger space. Correspondingly, under the same air volume, the centrifugal fan 1000 equipped with the volute 100 of the embodiment of the present invention has a lower working sound, which improves the comfort of the centrifugal fan 1000. Correspondingly, under the same air volume and the same working sound, the volute 100 has a smaller volume, meeting the requirements of lower cost or adapting to more diversified installation space 51.

[0144] Specifically, the recessed portion 25 may be a groove formed on the volute tongue 22 by a process such as stamping. The recessed portion 25 may include one or more grooves.

[0145] Please refer to Fig.11 In some embodiments, the side panel 10 made of the first material has a retaining edge 14 extending from the base plate 12 toward the other side panel 10 , the retaining edge 14 is located in the air suction area 3006 and is arranged opposite to the third connecting portion 3011 to form a gap 15 , and the edge portion of the enclosure 20 is inserted into the gap 15 .

[0146] Inside the volute 100, the turbulence of the gas is usually formed in the suction area 3006. Therefore, there are many gases with different flow directions inside the volute 100 that attack the edge of the suction area 3006, especially the area of ​​the suction area 3006 close to the third connection part 3011. Therefore, there is a risk of leakage at the edge of the suction area 3006 close to the third connection part 3011. Therefore, the rib 14 opposite to the third connection part 3011 is provided in the suction area 3006 to reduce the risk of gas leakage from the edge of the suction area 3006.

[0147] During the assembly process, an additional support component may be provided on the air outlet area 3005 to facilitate the fixing of the enclosure 20 of the air outlet area 3005. For example, fasteners are used to connect the enclosure 20 and the side panel 10. However, the position of the air inlet area is difficult to directly visually observe, which may result in the situation that the enclosure 20 and the side panel 10 are not assembled properly when fasteners are used to connect them. Therefore, the baffle plate provided in the air suction area 3006 can also provide support and limit functions, thereby facilitating the fixing of the enclosure 20.

[0148] Please refer to Figure 2 , Fig.13 and Fig.14 In some embodiments, the surfaces of the first connection portion 3009 and the second connection portion 3010 facing the enclosure 20 are defined as inner surfaces, the inner surface 3012 of the first connection portion 3009 is recessed with a first overlap groove 3013, the distal volute tongue wall 3008 is overlapped in the first overlap groove 3013, the inner surface 3014 of the second connection portion 3010 is recessed with a second overlap groove 3015, and the proximal volute tongue wall 3007 is overlapped in the second overlap groove 3015.

[0149] Thus, during the assembly process, the first overlap groove 3013 can be used as a positioning reference between the first connection portion 3009 and the distal volute tongue wall 3008; the second overlap groove 3015 can be used as a positioning reference between the second connection portion 3010 and the proximal volute tongue wall 3007. The overlap groove is conducive to reducing the height difference between the top surface 21 of the enclosure 20 and the inner surface 3014 of the first connection portion 3009 or the second connection portion 3010, thereby facilitating the airflow to pass through the air outlet area 3005, thereby improving the overall air outlet efficiency of the volute 100.

[0150] Specifically, the first overlapping groove 3013 can be formed by injection molding. The second overlapping groove 3015 can be formed by injection molding.

[0151] Please refer to Figure 2 , Fig.13 and Fig.14 In some embodiments, the inner surface 3012 of the first connecting portion 3009 is flush with the proximal volute tongue wall 3007 , and the inner surface 3014 of the second connecting portion 3010 is flush with the distal volute tongue wall 3008 .

[0152] In this way, by making the inner surface 3012 of the first connecting portion 3009 flush with the proximal volute tongue wall 3007 and the inner surface of the second connecting portion 3010 flush with the distal volute tongue wall 3008, it is beneficial for airflow to pass through the air outlet area 3005, thereby improving the overall air outlet efficiency of the volute 100.

[0153] Please refer to Figure 4 and Fig.15In some embodiments, each substrate 12 includes a first substrate 3016 and a second substrate 3017, the two first substrates 3016 cover the two sides of the air suction area 3006, the two second substrates 3017 cover the two sides of the air outlet area 3005, the two first substrates 3016 are parallel to each other, and the two second substrates 3017 extend away from each other in an oblique direction from the upstream to the downstream of the air outlet area 3005; the second substrate 3017 made of the first material has a first connecting portion 3009 and a second connecting portion 3010, the width of the first connecting portion 3009 and the second connecting portion 3010 gradually increases from the upstream to the downstream of the air outlet area 3005, and the first overlapping groove 3013, the second overlapping groove 3015, and the third connecting portion 3011 are arranged with equal width.

[0154] In this way, when the centrifugal fan 1000 is working, the impeller 200 draws the external wind into the volute 100 through the air inlet 11 and blows it toward the indoor heat exchanger 420 through the air outlet area 3005. Since the two second substrates 3017 extend away from each other, the wind passing through the area between the two second substrates 3017 can be diffused in the process of blowing toward the indoor heat exchanger 420, and the dynamic pressure of the air outlet area 3005 is converted into static pressure as much as possible, while reducing the wind speed at the air outlet area 3005, which is beneficial to reducing the operating noise of the air conditioner.

[0155] Furthermore, the width of the first connection portion 3009 and the second connection portion 3010 gradually increases from the upstream to the downstream direction of the air outlet area 3005, which can increase the area of ​​the airflow directly blowing the indoor heat exchanger 420, thereby improving the heat exchange effect of the indoor heat exchanger 420, and preventing the airflow from concentratedly impacting the indoor heat exchanger 420, further reducing the operating noise of the air conditioner. Therefore, the centrifugal fan 1000 using the volute 100 of the embodiment of the present invention is conducive to improving the heat exchange effect of the air conditioner and can also effectively reduce the operating noise of the air conditioner.

[0156] Since the first lap groove 3013, the second lap groove 3015 and the third connection portion 3011 are set with equal width, it is beneficial to save materials during manufacturing, thereby reducing manufacturing costs. Because the lap grooves are calculated according to the maximum size when manufacturing, if they are set with different widths, it may lead to material waste.

[0157] Specifically, in the direction f from the upstream to the downstream of the air outlet area 3005, the distance between the two second substrates 3017 increases from D5 to D6. D5 is the distance between the two ends of the two second substrates 3017 away from the air outlet area 3005, and D6 is the distance between the two ends of the two second substrates 3017 close to the air outlet area 3005.

[0158] Please refer to Fig.16In some embodiments, the connecting portion 13 further includes a fourth connecting portion 3018 , which is connected between the second connecting portion 3010 and the third connecting portion 3011 , extends along the profile of the volute tongue 22 and supports the volute tongue 22 .

[0159] In this way, the fourth connecting portion 3018 can make the position of the volute tongue 22 more stable, thereby achieving the effect of reducing noise.

[0160] Specifically, one end of the fourth connection part 3018 may be connected to the second connection part 3010. The other end of the fourth connection part 3018 may be connected to the third connection part 3011. The second connection part 3010, the third connection part 3011, and the fourth connection part 3018 may be integrally formed by injection molding, which can reduce joint points and further reduce noise.

[0161] Please refer to Figure 2 and Figure 4 In some embodiments, each side plate 10 has a base plate 12 configured to be in the shape of a volute 100, at least one side plate 10 is made of plastic, and the enclosure 20 is made of metal, and the space between the two base plates 12 is defined as the inner side. The side plate 10 made of the first material has a guide ring 30 extending inwardly from the base plate 12 as a whole, and the guide ring 30 forms the air inlet 11.

[0162] In this way, the guide ring 30 can smooth and guide the airflow, reducing turbulence and noise when the airflow enters the volute 100. The guide ring 30 is arranged at the edge of the air inlet 11, which helps to more effectively guide the airflow through the air inlet 11 and reduce the generation of airflow turbulence and vortex.

[0163] Specifically, the guide ring 30 may be connected to the side plate 10. The guide ring 30 may be convexly disposed on one side of the side plate 10 in a direction toward the impeller 200. The guide ring 30 may be disposed around the periphery of the air inlet 11. The shape of the guide ring 30 may match the shape of the air inlet 11. For example, for a circular air inlet 11, the shape of the guide ring 30 may be an annular ring.

[0164] Please refer to Figure 2 and Figure 4 In some embodiments, the side plate 10 and the guide ring 30 are an integrally formed structure.

[0165] In this way, the one-piece structure eliminates the potential joints between the side panel 10 and the guide ring 30, thereby reducing the possibility of air leakage and reducing the noise and vibration caused by airflow impact. In addition, since there are no joints or connection points between the side panel 10 and the guide ring 30, the structural weaknesses caused by improper connection or long-term use are reduced. In addition, the one-piece molded side panel 10 and guide ring 30 reduce additional assembly steps and simplify the manufacturing process.

[0166] Specifically, the side plate 10 and the guide ring 30 can be integrally formed by injection molding, 3D printing, or the like.

[0167] Please refer to Figure 2 In some embodiments, along the axial direction z of the air inlet 11 , a sinking groove 26 is provided at the edge of the volute tongue 22 , and the sinking groove 26 is recessed in a direction away from the distal volute tongue wall 3008 .

[0168] In this way, during the operation of the centrifugal fan 1000 equipped with the volute 100 according to the embodiment of the present invention, the minimum gap between the volute tongue 22 and the outer edge of the impeller 200 can be ensured by setting the sink groove 26, and at the same time, the impact of the airflow on the volute tongue 22 can be reduced, thereby optimizing the flow field inside the volute 100, and effectively suppressing the airflow from generating vortices at the volute tongue 22. While ensuring the performance of the centrifugal fan 1000, the vortex noise of the centrifugal fan 1000 is effectively reduced, thereby improving the use comfort of the centrifugal fan 1000 and ensuring the air supply efficiency of the centrifugal fan 1000.

[0169] Specifically, the sink groove 26 can be formed by a process such as stamping. The sink groove 26 can be located on two opposite sides of the volute tongue 22. The number of the sink groove 26 can be one or more. For example, a sink groove 26 can be provided on two opposite sides of the volute tongue 22, respectively.

[0170] Please refer to Figure 2 , Figure 4 and Fig.17 In some embodiments, the volute 100 further includes a support leg 40 , and the support leg 40 and the side plate 10 are both integrally formed of the first material.

[0171] In this way, since the support foot 40 and the side panel 10 are integrally formed of the first material, this not only reduces the weight of the support foot 40 and the side panel 10 as a whole, but also simplifies the manufacturing and assembly process of the entire volute 100. The integrally formed side panel 10 and support foot 40 reduce the position deviation that may occur during the assembly process, ensuring the accuracy and consistency of the structure. Since the position deviation caused by improper assembly is eliminated, the noise generated by the volute 100 during operation is reduced. In addition, since there is no seam or connection point between the support foot 40 and the side panel 10, the structural weakness caused by improper connection or long-term use is reduced.

[0172] In addition, the support foot 40 can provide an additional support point for the entire volute 100 structure, enhance its stability during installation or operation, and reduce displacement or tilting caused by vibration or external force. In addition, the addition of the support foot 40 allows the volute 100 to adapt to uneven installation surfaces, provides more installation options, and allows the volute 100 to be more easily installed on a variety of different surfaces.

[0173] Specifically, the number of the legs 40 can be multiple. For example, a leg 40 can be provided at each end of the volute 100 in the length direction. The legs 40 and the side panels 10 can be detachably connected by using mechanical elements such as bolts and screws, or can be non-detachably connected by welding, riveting, etc. The legs 40 can be installed at the bottom, side or other positions of the volute 100 to support the side panels 10 or other components in different directions. The bracket and the side panels 10 can be integrally formed by injection molding, 3D printing, etc.

[0174] Please refer to Fig.17 and Fig.18 In some embodiments, the support leg 40 is provided with a mounting seat 50 for mounting the temperature sensing package 3048 .

[0175] In this way, the temperature sensing package 3048 can directly measure the temperature of the installation area, which can be used as the air inlet temperature of the air conditioner, providing accurate temperature data for the air conditioner, thereby serving as a direct basis for adjusting the functional parameters of the air conditioner, so that the air conditioner can be adjusted more accurately according to the actual ambient temperature.

[0176] In addition, since the mounting base 50 is located on the support leg 40, this can save space and avoid the need to additionally install the temperature sensing package 3048 in a limited space, thereby improving space utilization efficiency.

[0177] Specifically, the temperature sensing package 3048 may include one or more temperature sensors. The temperature sensor may be used to detect the ambient temperature of the mounting seat 50 area. The mounting seat 50 may include a fixing structure and a limiting structure to limit the position of the temperature sensing package 3048. One mounting seat 50 may be installed with one or more temperature sensing packages 3048. The number of mounting seats 50 may be one or more. One leg 40 may include one or more mounting seats 50. For example, the number of the legs 40 and the mounting seat 50 may be two, and the two legs 40 are respectively arranged on two mounting seats 50.

[0178] Please refer to Fig.18 , Fig.19 and Fig. 20 In some embodiments, the mounting seat 50 is formed with an installation space 51 , and the installation space 51 is used to accommodate the temperature sensing package 3048 .

[0179] In this way, the temperature sensing package 3048 is installed in the installation space 51, which keeps the appearance of the volute 100 neat and beautiful, and avoids the clutter caused by additional accessories.

[0180] Please refer to Fig.18 , Fig.19 and Fig. 20In some embodiments, the mounting base 50 is formed with a plurality of through holes 41 , and a support bar 42 is provided between two adjacent through holes 41 . The support bar 42 is protruded from one side of the top surface 3019 of the support leg 40 , and the support bar 42 is located at the bottom of the mounting space 51 .

[0181] Thus, the multiple through holes 41 on the support leg 40 are designed for ventilation, which enhances the heat dissipation performance of the area and effectively avoids heat accumulation, which helps to ensure that the temperature data measured by the temperature sensing package 3048 is not disturbed by the heat accumulation of the surrounding environment, thereby improving the reliability of temperature measurement. The provision of the support bar 42 can reduce the contact area between the mounting base 50 and the temperature sensing package 3048, increase the ventilation space around the temperature sensing package 3048, facilitate the heat dissipation of the temperature sensing package 3048, and further improve the accuracy of temperature measurement.

[0182] In addition, the design of the through hole 41 reduces the material usage of the support leg 40, achieves weight reduction, helps reduce material costs, and thus directly reduces manufacturing costs. The design of the through hole 41 is conducive to the flow of liquid during injection molding, reduces shrinkage during the injection molding process, and improves the molding quality and production efficiency of the support leg 40.

[0183] Specifically, the number of through holes 41 may be two, three, four or even more. The through holes 41 are spaced apart from each other. The support bar 42 may be disposed in the spaced area between two adjacent through holes 41. The support bar 42 may be protruded on one side of the support foot 40 in a direction away from the support foot 40. The support bar 42 may be integrally formed with the support foot 40. The support bar 42 may also be manufactured separately from the support foot 40 and then assembled.

[0184] Please refer to Fig. 20 There are multiple support bars 42 , which are arranged at intervals. Along the arrangement direction of the support bars 42 , the support bars 42 located in the middle of the support bars 42 are provided with convex bars 3020 , which extend to the side away from the installation space 51 .

[0185] In this way, the convex strip 3020 can increase the strength of the support strip 42. The center of gravity of the support is generally concentrated in the middle position, so the method of arranging the convex strip 3020 on the support strip 42 in the middle of the plurality of support strips 42 can increase the stability of the support strip 42 during support.

[0186] Please refer to Fig. 20 In some embodiments, the support bar 42 includes a first guide surface 3021 and a support plane 3022 , the support plane 3022 faces the installation space 51 and is used to install the temperature sensing package 3048 , and along the direction toward the side panel 10 , the first guide surface 3021 extends from the support plane 3022 toward the top surface 3019 of the support leg 40 .

[0187] In this way, the support plane 3022 can be used to install the temperature sensing package 3048, so that the temperature sensing package 3048 can be stably accommodated in the installation space 51. The support plane 3022 is located above the top surface 3019 of the support leg 40, and the first guide surface 3021 extends from the support plane 3022 to the direction close to the top surface 3019 of the support leg 40, which means that the first guide surface 3021 is inclined downward relative to the top surface 3019 of the support leg 40. Therefore, the first guide surface 3021 can play a role in guiding the temperature sensing package 3048, which is conducive to the installation and removal of the temperature sensing package 3048, thereby improving the efficiency of the installation and removal of the temperature sensing package 3048.

[0188] Please refer to Fig. 20 In some embodiments, along the thickness direction of the side plate 10, the size of the support plane 3022 is configured to be larger than the size of the temperature sensing package 3048. In this way, the temperature sensing package 3048 is not prone to slipping when installed on the support plane 3022, thereby improving the stability of the temperature sensing package 3048 during use.

[0189] Please refer to Fig. 20 In some embodiments, the support bar 42 includes a first support portion 3023 and a second support portion 3024 connected to the first support portion 3023 , the second support portion 3024 is close to the installation space 51 , and along the arrangement direction of the plurality of support bars 42 , the size of the second support portion 3024 is smaller than the size of the first support portion 3023 , and the second support portion 3024 is used to support the temperature sensing package 3048 .

[0190] In this way, the second support portion 3024 of smaller size can further reduce the contact area between the mounting base 50 and the temperature sensing package 3048, increase the ventilation space around the temperature sensing package 3048, facilitate heat dissipation of the temperature sensing package 3048, and further improve the accuracy of temperature measurement.

[0191] Please refer to Fig.18 and Fig. 20 In some embodiments, the mounting base 50 includes a base 3025 and an elastic claw 3026 . The base 3025 is connected to the side plate 10 . The elastic claw 3026 is protruding from a side of the base 3025 away from the side plate 10 . The elastic claw 3026 and the support bar 42 form a mounting space 51 .

[0192] In this way, the elastic claw 3026 can cooperate with the support bar 42 to limit the position of the temperature sensing package 3048, so that the temperature sensing package 3048 is not easy to move, thereby reducing the probability of the temperature sensing package 3048 falling off during use, transportation and installation. In addition, the elastic claw 3026 can be elastically deformed, which is conducive to removing the temperature sensing package 3048 from the installation space 51.

[0193] Specifically, the elastic claw 3026 may be a claw-shaped structure made of elastic material. There may be a plurality of elastic claws 3026 . The plurality of elastic claws 3026 may be arranged at intervals along the length direction or the width direction of the mounting seat 50 .

[0194] Please refer to Fig.17 , Fig.18 and Fig. 20 In some embodiments, the first end 3027 of the elastic claw 3026 is a free end, the second end 3028 of the elastic claw 3026 is fixedly connected to the base 3025 , and the free end can elastically move relative to the support leg 40 .

[0195] In this way, since the free end of the elastic claw 3026 can move elastically relative to the support leg 40, the installation flexibility of the temperature sensing package 3048 is improved, so that the position of the temperature sensing package 3048 can be adjusted within a certain range, and the installation and disassembly process of the temperature sensing package 3048 is more convenient.

[0196] Specifically, the free end is a portion of the elastic claw 3026 that can be moved by applying an external force. The fixed end can be fixedly connected to other parts of the mounting base 50. The fixed connection method can be one-piece molding, welding, riveting, etc.

[0197] Please refer to Fig.17 In some embodiments, a disassembly opening 3029 is formed between the first end 3027 of the elastic claw 3026 and the support bar 42 , and the disassembly opening 3029 is communicated with the installation space 51 .

[0198] During the assembly process, the temperature sensing package 3048 can be taken out from the installation space 51 through the disassembly opening 3029. In addition, since the first end 3027 of the elastic claw 3026 is a free end, the disassembly process of the temperature sensing package 3048 is relatively convenient.

[0199] Please refer to Fig.18 In some embodiments, the first end 3027 of the elastic claw 3026 is provided with a second guide surface 3049 , and the second guide surface 3049 extends away from the top surface 3019 of the support leg 40 in the direction of the side panel 10 toward the disassembly opening 3029 .

[0200] In this way, the second guide surface 3049 can facilitate the operation of the operator. For example, it is convenient for the operator to directly lift the elastic claw 3026 by hand.

[0201] Please refer to Fig.18 and Fig. 20 In some embodiments, the mounting base 50 and the support leg 40 are integrally formed of a first material.

[0202] In this way, since the mounting seat 50 and the support foot 40 are both integrally formed of the first material, this not only reduces the overall weight of the mounting seat 50 and the support foot 40, but also simplifies the manufacturing and assembly process of the entire volute 100. The mounting seat 50 and the support foot 40 are an integrally formed structure. This design improves the integrity of the overall structure and reduces the risk of failure due to loosening or damage of the connection part 13. The integrally formed mounting seat 50 and the support foot 40 reduce additional assembly steps, simplify the production process, improve manufacturing efficiency, and reduce production costs. The integrally formed mounting seat 50 and the support foot 40 reduce the positional deviation that may occur during the assembly process and ensure the accuracy and consistency of the structure. Since the positional deviation caused by improper assembly is eliminated, the noise generated by the volute 100 during operation is reduced.

[0203] Specifically, the mounting base 50 and the support leg 40 can be integrally formed by injection molding, 3D printing, or the like.

[0204] Please refer to Figure 4 and Fig.21 In some embodiments, the volute 100 is provided with an air outlet 24 , and the support leg 40 is provided with a wire clamping seat 60 , which is located on a side of the support leg 40 away from the air outlet 24 , and the wire clamping seat 60 is provided with a wire clamping groove 61 .

[0205] Thus, by providing the wire holder 60 on the support leg 40, the pipelines related to the air conditioner, such as power lines, signal lines, etc., can be conveniently managed and fixed, so that the pipelines can be clamped in the wire holder groove 61, and the overall neatness and order are maintained. At the same time, since it is located on the side of the support leg 40 away from the air outlet 24, the airflow has little effect on the wire holder 60 and the pipeline, which can increase the service life of the wire holder 60 and the pipeline.

[0206] Specifically, the wire clamping seat 60 can be detachably connected to the support leg 40 by mechanical elements such as bolts and screws, or can be non-detachably connected by welding, riveting, etc. The number of the wire clamping seat 60 can be one or more. For example, the wire clamping seat 60 can be arranged on both sides of the length direction of the volute 100. One wire clamping seat 60 can be provided with one or more wire clamping grooves 61.

[0207] Please refer to Fig.21 In some embodiments, the wire holder 60 and the support leg 40 are an integrally formed structure.

[0208] In this way, the wire clamping seat 60 and the support leg 40 are an integrally formed structure. This design improves the integrity of the overall structure and reduces the risk of failure due to loosening or damage of the connecting portion 13. The integrally formed wire clamping seat 60 and the support leg 40 reduce additional assembly steps, simplify the production process, improve manufacturing efficiency, and reduce production costs. The integrally formed wire clamping seat 60 and the support leg 40 reduce the position deviation that may occur during the assembly process and ensure the accuracy and consistency of the structure. Since the position deviation caused by improper assembly is eliminated, the noise generated by the volute 100 during operation is reduced.

[0209] Specifically, the wire holder 60 and the support leg 40 can be integrally formed by injection molding, 3D printing, or the like.

[0210] Please refer to Figure 2 In some embodiments, the flange 70 is disposed around the two side panels 10 and the enclosure panel 20 .

[0211] In the air conditioner, the centrifugal fan 1000 and the indoor heat exchanger 420 can be installed in different chambers. The centrifugal fan 1000 and the indoor heat exchanger 420 can be isolated by a partition 2001. The provision of the partition 2001 can ensure the flow path of the airflow and reduce the probability that the airflow flows out of the centrifugal fan 1000 and then returns from the indoor heat exchanger 420. Therefore, by providing a flange 70 surrounding the two side panels 10 and the enclosure 20, the flange 70 can abut against the partition 2001, thereby increasing the contact area between the volute 100 and the partition 2001, making the connection between the volute 100 and the partition 2001 more stable and reliable, reducing the gap between the volute 100 and the partition 2001, thereby improving the sealing effect of the centrifugal fan 1000.

[0212] Specifically, the flange 70 can be arranged on one side of the side plate 10 in a direction away from the side plate 10, or on one side of the enclosure 20 in a direction away from the enclosure 20. The flange 70 can be detachably connected to the side plate 10 by mechanical elements such as screws and bolts, or can be non-detachably connected by welding, riveting, etc. The flange 70 can be detachably connected to the enclosure 20 by mechanical elements such as screws and bolts, or can be non-detachably connected by welding, riveting, etc.

[0213] Please refer to Figure 2 In some embodiments, the flange 70 includes a first docking portion 71 and a second docking portion 72 , the first docking portion 71 is fixedly connected to the side plate 10 , and the second docking portion 72 is detachably connected to the first docking portion 71 .

[0214] In this way, part of the structure of the flange 70 can be disassembled, which can facilitate the installation and disassembly of components such as the side panel 10 and the enclosure 20.

[0215] Specifically, the number of the first docking portion 71 and the second docking portion 72 can be two. The two first docking portions 71 can be respectively arranged on the two side panels 10. The first docking portion 71 can be fixedly connected to the side panel 10 by welding, integral molding, etc. The second docking portion 72 can be detachably connected to the two first docking portions 71 by threaded connection, clamping, etc.

[0216] Please refer to Figure 2 In some embodiments, the first docking portion 71 and the side panel 10 are an integrally formed structure.

[0217] In this way, the first docking portion 71 and the side plate 10 are an integrally formed structure. This design improves the integrity between the flange 70 and the side plate 10 and reduces structural weaknesses caused by improper connection. The integrally formed first docking portion 71 and the side plate 10 provide a more secure connection, enhance the connection strength between the flange 70 and the side plate 10 of the volute 100, and ensure the stability of the structure. The integrally formed design simplifies the manufacturing process, avoids additional welding or assembly steps, and reduces production costs and time.

[0218] Specifically, the first docking portion 71 and the side panel 10 can be integrally formed by injection molding, 3D printing, or the like.

[0219] Please refer to Fig. 22 and Fig.23 In some embodiments, the second docking portion 72 abuts against the plane formed by the distal volute tongue wall 3008 and the air suction area 3006. In this way, the second docking portion 72 abuts against the plane formed by the distal volute tongue wall 3008 and the air suction area 3006 to limit the second docking portion 72, thereby increasing the strength of at least one of the distal volute tongue wall 3008 and the air suction area 3006 in the width direction of the enclosure 20.

[0220] Please refer to Fig.23 In some embodiments, the outer peripheral surface 3030 of the distal volute tongue wall 3008 and the outer peripheral surface 3031 of the suction zone 3006 are planarly transitioned, and the second docking portion 72 includes an abutting wall 3032 and a docking wall 3033 connected to the abutting wall 3032, and the abutting wall 3032 abuts against at least one of the outer peripheral surface 3030 of the distal volute tongue wall 3008 and the outer peripheral surface 3031 of the suction zone 3006.

[0221] In this way, the second docking portion 72 can be limited by at least one of the outer peripheral surface 3030 of the distal volute tongue wall 3008 and the outer peripheral surface 3031 of the suction zone 3006, thereby increasing the strength of at least one of the distal volute tongue wall 3008 and the suction zone 3006 in the width direction of the enclosure 20.

[0222] Specifically, the docking wall 3033 can be used to dock with the first docking portion 71 .

[0223] Please refer to Fig.23 In some embodiments, the first docking portion 71 is provided with an inserting groove 710 , and an end portion of the second docking portion 72 is inserted into the inserting groove 710 .

[0224] Thus, this design simplifies the assembly process, so that the second docking portion 72 can be quickly and accurately connected to the first docking portion 71 .

[0225] Specifically, each of the two first docking portions 71 may be provided with an inserting slot 710 . Both ends of the second docking portion 72 in the length direction may be inserted into the two inserting slots 710 , respectively.

[0226] Please refer to Fig.24 , Fig.25 and Fig.26 In some embodiments, one of the slot wall of the insertion slot 710 and the end of the second docking portion 72 is provided with a first slot 7100 , and the other is provided with a first block 720 , which is locked in the first slot 7100 to limit the second docking portion 72 from moving away from the enclosure 20 .

[0227] In this way, by arranging the structure of the first card slot 7100 and the first card block 720 between the slot wall of the plug-in slot 710 and the end of the second docking part 72, the connection firmness between the second docking part 72 and the first docking part 71 can be significantly enhanced, preventing the second docking part 72 from accidentally falling off or shifting, thereby ensuring the stability of the connection in various working environments.

[0228] Specifically, the number of the first card slot 7100 and the number of the first card block 720 can be one or more. The first card slot 7100 and the first card block 720 can be arranged in a one-to-one correspondence.

[0229] Please refer to Fig.23 and Fig.26 In some embodiments, a first elastic cantilever 3034 is provided at one of the slot wall of the plug slot 710 and the end of the second docking portion 72 , and the first clamping block 720 is configured to be located at the free end of the first elastic cantilever 3034 .

[0230] Thus, the first elastic cantilever 3034 has elastic deformation capability, which makes it easier to disassemble the first elastic cantilever 3034 and the first clamping block 720. When disassembly is required, only a certain external force is applied to deform the first elastic cantilever 3034, and the first clamping block 720 can be removed from the first elastic cantilever 3034, thereby achieving quick disassembly.

[0231] Specifically, the first elastic cantilever 3034 can be deformed when subjected to an external force, and can return to its original shape after the external force is removed.

[0232] Please refer to Fig.23 In some embodiments, the plugging slot 710 has a plugging port 7101 , which is disposed away from the side panel 10 , and the second docking portion 72 is used to be inserted into the plugging slot 710 through the plugging port 7101 .

[0233] In this way, the arrangement of the plug-in port 7101 away from the side plate 10 allows the second docking portion 72 to utilize the area between the two side plates 10 , thereby helping to improve the overall space utilization of the volute 100 .

[0234] Specifically, the two first docking portions 71 may be respectively provided with a plugging slot 710. The plugging ports 7101 of the two plugging slots 710 may be arranged opposite to each other. The directions of the plugging ports 7101 of the two plugging slots 710 may be opposite.

[0235] Please refer to Fig.23 In some embodiments, the first docking portion 71 is provided with a first limiting portion 711, and both ends of the second docking portion 72 are provided with second limiting portions 721, and the first limiting portion 711 and the second limiting portion 721 are cooperatively connected to limit the two side panels 10 from moving away from each other.

[0236] In this way, by cooperating with the limiting parts of the first docking part 71 and the second docking part 72 , the movement of the two side panels 10 away from each other can be limited, thereby enhancing the stability of the side panels 10 and the rigidity of the overall structure.

[0237] Specifically, the first limiting portion 711 and the second limiting portion 721 may be provided with structures such as threaded holes, snap-fit ​​holes, and protrusions, so that limiting can be achieved through threaded connection, snap-fit, and the like.

[0238] In some embodiments, the second limiter 721 and the first slot 7100 are arranged in a direction from upstream to downstream of the air outlet area 3005. In this way, the second limiter 721 and the first slot 7100 have compact structures, which can improve the overall space utilization of the volute 100.

[0239] Please refer to Fig.23 In some embodiments, the first limiting portion 711 includes a first limiting piece 7110 , the second limiting portion 721 includes a second limiting piece 7210 , the first limiting piece 7110 abuts against the second limiting piece 7210 , and the two first limiting pieces 7110 are located between the two second limiting pieces 7210 .

[0240] In this way, the use of the limiting piece provides an additional locking mechanism, ensuring that the connection between the first docking portion 71 and the second docking portion 72 is more reliable, and reducing the loose connection caused by vibration or external force. In addition, the first limiting piece 7110 can utilize the area between the two second limiting pieces 7210, thereby helping to improve the overall space utilization of the volute 100. In addition, it is relatively simple to achieve the limiting by means of the limiting piece, and it is easy to manufacture.

[0241] Please refer to Fig.16 In some embodiments, the flange 70 further includes a third docking portion 3035 , which is disposed corresponding to the volute tongue 22 , and the third docking portion 3035 is detachably connected to the first docking portion 71 .

[0242] In this way, part of the structure of the flange 70 can be disassembled, which can facilitate the installation and disassembly of components such as the side panel 10 and the enclosure 20.

[0243] Specifically, the third docking portion 3035 and the first docking portion 71 can be detachably connected by means of threaded connection, snap connection, etc.

[0244] Please refer to Fig.16 , Fig. 27 and Fig.28 In some embodiments, one of the ends of the first docking portion 71 and the third docking portion 3035 is provided with a second slot 3036 , and the other is provided with a second block 3037 , which is locked in the second slot 3036 to limit the third docking portion 3035 from moving away from the volute tongue 22 .

[0245] In this way, by providing a second card slot 3036 and a second card block 3037 in the ends of the first docking part 71 and the third docking part 3035, the connection firmness between the first docking part 71 and the third docking part 3035 can be significantly enhanced, preventing the third docking part 3035 from accidentally falling off or shifting, thereby ensuring the stability of the connection in various working environments.

[0246] Specifically, the number of the second card slots 3036 and the number of the second card blocks 3037 can be one or more. The second card slots 3036 and the second card blocks 3037 can be arranged in a one-to-one correspondence.

[0247] Please refer to Fig. 27 In some embodiments, one of the ends of the first docking portion 71 and the third docking portion 3035 is provided with a second elastic cantilever 3038 , and the second clamping block 3037 is configured to be located at the free end of the second elastic cantilever 3038 .

[0248] Thus, the second elastic cantilever 3038 has elastic deformation capability, which makes it easier to disassemble the second elastic cantilever 3038 and the second clamping block 3037. When disassembly is required, only a certain external force is applied to deform the second elastic cantilever 3038, and the second clamping block 3037 can be removed from the second elastic cantilever 3038, thereby achieving quick disassembly.

[0249] Specifically, the second elastic cantilever 3038 can be deformed when subjected to an external force, and can return to its original shape after the external force is removed.

[0250] Please refer to Fig.16 and Fig.29 In some embodiments, the first docking portion 71 is provided with a third limit portion 3039, and both ends of the third docking portion 3035 are provided with a fourth limit portion 3040, and the third limit portion 3039 and the fourth limit portion 3040 are connected in cooperation to limit the two side panels 10 from moving away from each other, and the fourth limit portion 3040 and the second slot 3036 are arranged in the direction from upstream to downstream of the air outlet area 3005.

[0251] In this way, through the cooperation of the third limiting portion 3039 and the fourth limiting portion 3040, the two side panels 10 can be limited from moving away from each other, thereby enhancing the stability of the side panels 10 and the rigidity of the overall structure. Since the fourth limiting portion 3040 and the second clamping groove 3036 are arranged in the direction from upstream to downstream of the air outlet area 3005, the fourth limiting portion 3040 and the second clamping groove 3036 have a compact structure, which can improve the overall space utilization of the volute 100.

[0252] Specifically, the third limiting portion 3039 and the fourth limiting portion 3040 may be provided with structures such as threaded holes, snap-fit ​​holes, and protrusions, so that limiting can be achieved through threaded connection, snap-fit, and the like.

[0253] Please refer to Fig.29 In some embodiments, the third limiting portion 3039 includes a third limiting piece 3041 , the fourth limiting portion 3040 includes a fourth limiting piece 3042 , the third limiting piece 3041 abuts against the fourth limiting piece 3042 , and the two third limiting pieces 3041 are located between the two fourth limiting pieces 3042 .

[0254] In this way, the use of the limiting piece provides an additional locking mechanism, ensuring that the connection between the first docking portion 71 and the third docking portion 3035 is more reliable, and reducing the loose connection caused by vibration or external force. In addition, the third limiting piece 3041 can use the area between the two fourth limiting pieces 3042, thereby helping to improve the overall space utilization of the volute 100. In addition, it is relatively simple to achieve the limit by means of the limiting piece, and it is easy to manufacture.

[0255] Please refer to Fig.16and Fig. 27 In some embodiments, the volute tongue 22 is provided with a first convex hump 3043 protruding away from the distal volute tongue wall 3008 , and the third docking portion 3035 is provided with a first curved surface 3044 abutting against the first convex hump 3043 .

[0256] In this way, by providing the first convex hump 3043 and the first curved surface 3044 , the connection between the volute tongue 22 and the third docking portion 3035 is tighter, thereby reducing the noise generated by the relative movement between the volute tongue 22 and the third docking portion 3035 during operation.

[0257] Please refer to Fig.16 and Fig. 27 In some embodiments, the volute tongue 22 is provided with a second convex hump 3045 protruding away from the distal volute tongue wall 3008 , the second convex hump 3045 is located between the side plate 10 and the first convex hump 3043 , and the third docking portion 3035 is provided with a second curved surface 3046 abutting against the second convex hump 3045 .

[0258] In this way, by providing the second convex hump 3045 and the second curved surface 3046, the connection between the distal volute tongue wall 3008 and the third docking portion 3035 is tighter, thereby reducing the noise generated by the relative movement between the distal volute tongue wall 3008 and the third docking portion 3035 during operation.

[0259] Please refer to Fig. 27 In some embodiments, the third docking portion 3035 is provided with a groove 3047 disposed near the second curved surface 3046. Thus, the provision of the groove 3047 can reduce the shrinkage of the third docking portion 3035 during the injection molding process, thereby improving the precision of the second curved surface 3046, thereby reducing the gap between the second curved surface 3046 and the second convex hump 3045, making the connection between the distal volute tongue wall 3008 and the third docking portion 3035 tighter, thereby reducing the noise generated by the relative movement between the distal volute tongue wall 3008 and the third docking portion 3035 during operation.

[0260] Third, please refer to Figure 1 The embodiment of the present invention provides a HVAC indoor unit 2100, and the HVAC indoor unit 2100 includes the centrifugal fan 1000 of any one of the above embodiments.

[0261] In this way, the centrifugal fan 1000 accelerates the airflow, thereby facilitating the circulation of air and improving the heat exchange effect.

[0262] Specifically, the thickness of the blade 202 in the impeller 200 changes in a specific trend, and the profile of the blade 202 is optimized, thereby reducing eddy currents and high and low pressure differences, improving fan efficiency, and improving noise problems. A reinforcement frame is provided at one end of the blade 202 away from the wheel disc 201, and the reinforcement frame forms a groove with the base ring through the protrusion, thereby improving the structural strength, avoiding the risk of shrinkage, and blocking reverse airflow, reducing noise, and improving wind pressure performance.

[0263] Please refer to Figure 1 and Fig.30 In some embodiments, the HVAC indoor unit 2100 includes a first machine 300 and a second machine 400, the first machine 300 includes a first box 310 and a centrifugal fan 1000, the centrifugal fan 1000 is disposed in the first box 310, the second machine 400 includes a second box 410 and an indoor heat exchanger 420420, the indoor heat exchanger 420420 is disposed in the second box 410, and the first box 310 and the second box 410 are detachably connected.

[0264] In this way, the centrifugal fan 1000 cooperates with the indoor heat exchanger 420420 in the detachably connected first machine 300 and the second machine 400, thereby accelerating the circulation and heat exchange of air and improving the efficiency of the HVAC indoor unit 2100.

[0265] Specifically, the first box 310 can be detachably connected to the second box 410 by at least one of a fixing connection, a card connection, a screw connection, a riveting connection, an adhesive connection, etc. The first box 310 and the second box 410 can be arranged side by side along the width direction or the length direction of the HVAC indoor unit 2100. Exemplarily, the first box 310 and the second box 410 are both square boxes, and the first box 310 and the second box 410 are arranged side by side along the width direction. The side walls of the first box 310 and the second box 410 in the width direction are opposite, and can be fitted to each other or separated by a small gap 15. The centrifugal fan 1000 and the indoor heat exchanger 420420 can be separated by the walls opposite to the first box 310 and the second box 410.

[0266] Fourth, please refer to Fig.31 The present application provides a HVAC system 2000 , which includes a HVAC indoor unit 2100 and a HVAC outdoor unit 2200 of any of the above-mentioned embodiments, and the HVAC outdoor unit 2200 is connected to the HVAC indoor unit 2100 through a pipeline 2300 .

[0267] In this way, the centrifugal fan 1000 accelerates the air circulation in the HVAC indoor unit 2100, thereby improving the heat exchange effect of the HVAC system 2000 between the indoor and outdoor.

[0268] Specifically, the HVAC outdoor unit 2200 includes a compressor 500, a flow switching device 600, an outdoor heat exchanger 700, and an expansion valve 800. The compressor 500 compresses and discharges the sucked refrigerant. The flow switching device 600 is, for example, a four-way valve, and is a device for switching the direction of the refrigerant flow path.

[0269] The outdoor heat exchanger 700 performs heat exchange between the refrigerant and the outdoor air. The outdoor heat exchanger 700 functions as an evaporator during heating operation, exchanges heat between the low-pressure refrigerant flowing in from the refrigerant pipe and the outdoor air, and evaporates the refrigerant into gas.

[0270] The outdoor heat exchanger 700 functions as a condenser during cooling operation, and performs heat exchange between the refrigerant compressed by the compressor 500 and flowing in from the flow switching device 600 and the outdoor air, thereby condensing and liquefying the refrigerant.

[0271] A centrifugal fan 1000 may also be provided in the outdoor heat exchanger 700 to improve the efficiency of heat exchange between the refrigerant and the outdoor air. The expansion valve 800 is a throttling device that functions as an expansion valve 800 by regulating the flow rate of the refrigerant flowing in the expansion valve 800 and adjusts the pressure of the refrigerant by changing the opening.

[0272] In one example, when the HVAC system 2000 is cooling, the high-temperature and high-pressure gas refrigerant compressed and ejected by the compressor 500 flows into the outdoor heat exchanger 700 via the flow path switching device 600. The gas refrigerant that has flowed into the outdoor heat exchanger 700 is condensed by heat exchange with the outside air sent by the outdoor blower, and becomes a low-temperature refrigerant, and flows out of the outdoor heat exchanger 700.

[0273] The refrigerant flowing out of the outdoor heat exchanger 700 is expanded and decompressed through the expansion valve 800 to become a low-temperature and low-pressure gas-liquid two-phase refrigerant. The gas-liquid two-phase refrigerant flows into the indoor heat exchanger 420420 of the HVAC indoor unit 2100, evaporates through heat exchange with the indoor air sent by the indoor blower, becomes a low-temperature and low-pressure gas refrigerant, and flows out of the indoor heat exchanger 420420.

[0274] At this time, the indoor air cooled by the refrigerant absorbs heat and becomes conditioned air and is blown out to the air-conditioned space from the outlet of the HVAC indoor unit 2100. The gas refrigerant flowing out of the indoor heat exchanger 420420 is sucked into the compressor 500 via the flow switching device 600 and compressed again. The above actions are repeated.

[0275] In summary, in one embodiment, the volute includes a circumferential plate 20 and two side plates 10 arranged opposite to each other. The circumferential plate 20 extends to form a volute profile line 3001. The two side plates 10 arranged opposite to each other are respectively connected to the two sides of the circumferential plate 20, and at least one side plate 10 is provided with an air inlet 11; wherein, at least one side plate 10 is detachably connected to the circumferential plate 20, each side plate 10 has a base plate 12 configured to be in the shape of a volute, and the space between the two base plates 12 is defined as the inner side, and the side plate 10 has a guide ring 30 extending inward from the base plate 12, and the guide ring 30 forms the air inlet 11.

[0276] In the volute 100 of the embodiment of the present invention, by setting the air inlet 11 on the side plate 10, the air flow into the volute 100 can be more effectively controlled and guided, so that the air flow inside the volute 100 can be increased, thereby improving the heat dissipation efficiency. The guide ring 30 can smooth and guide the airflow, reducing the turbulence and noise of the airflow when entering the volute 100. The air inlet 11 is formed on the guide ring 30, which helps to more effectively guide the airflow through the air inlet 11 and reduce the generation of airflow turbulence and eddy currents. The integrated structure eliminates the potential joints between the base plate 12 and the guide ring 30, thereby reducing the possibility of air leakage and reducing the noise and vibration caused by the impact of airflow. In addition, since there are no joints or connection points between the base plate 12 and the guide ring 30, the structural weaknesses caused by improper connection or long-term use are reduced. In addition, the integrated base plate 12 and the guide ring 30 reduce additional assembly steps and simplify the manufacturing process.

[0277] In addition, the detachable connection design allows the side plate 10 and the shroud 20 of the volute 100 to be produced separately and then assembled. This modular production method can improve production efficiency and reduce the complexity and cost of the production process. At the same time, the detachable design also facilitates later maintenance and replacement, improving assembly efficiency. For example, the detachable design of the side plate 10 and the shroud 20 can facilitate the installation and removal of the impeller 200.

[0278] Please refer to Figure 1 , Fig.32 and Fig.33 The HVAC indoor unit 2100 of the embodiment of the present invention comprises a first housing 310, a second housing 410, a partition 2001, a mounting frame 2004 and a centrifugal fan 1000. The second housing 410 is connected to the first housing 310; the partition 2001 is arranged between the first housing 310 and the second housing 410; the mounting frame 2004 is arranged in the first housing 310; the centrifugal fan 1000 is arranged in the first housing 310, and the centrifugal fan 1000 comprises a volute 100, an impeller 200 and a flange 70. The volute 100 is mounted on the mounting frame 2004 and penetrates the partition 2001. The impeller 200 is accommodated in the volute 100. The flange 70 is arranged on the volute 100 and abuts against the partition 2001.

[0279] In the above-mentioned HVAC indoor unit 2100, since the volute 100 is installed on the mounting frame 2004, and the partition 2001 is in contact with the flange 70, the center of gravity of the volute 100 is relatively close to the mounting position, thereby reducing the downward pulling force on the volute 100. Therefore, after installation, the position of the volute 100 is not easy to shift, which improves the position stability of the volute 100, thereby improving the anti-seismic performance of the volute 100, and the position of the impeller 200 in the volute 100 is not easy to shift, thereby reducing the wind field noise in the centrifugal fan 1000 area. In addition, the abutment design of the partition 2001 and the flange 70 can also ensure the sealing performance between the flange 70 and the partition 2001, so that the airflow is not easy to leak.

[0280] Specifically, the first box body 310 and the second box body 410 can provide a stable shell for the HVAC indoor unit 2100 to protect the internal components of the HVAC indoor unit 2100. The mounting frame 2004 can be arranged on the first box body 310 by a detachable connection method such as threaded connection and clamping, or can be arranged on the first box body 310 by a non-detachable method such as welding and riveting.

[0281] The partition 2001 can be used to isolate different functional areas. For example, the centrifugal fan 1000 and the indoor heat exchanger 420 of the indoor unit can be installed in the first box body 310 and the second box body 410 respectively, and the centrifugal fan 1000 and the indoor heat exchanger 420 of the indoor unit can be separated by the partition 2001.

[0282] The mounting frame 2004 may be provided with threaded holes, clamping grooves, welding areas, rivet holes, and other structures for mounting the volute 100. For example, the mounting frame 2004 and the volute 100 may be provided with corresponding threaded holes, and the volute 100 may be mounted on the mounting frame 2004 by using screws or bolts or other fastening components. For another example, the mounting frame 2004 and the volute 100 may be provided with corresponding rivet holes, and the volute 100 may be mounted on the mounting frame 2004 by using rivets.

[0283] The flange 70 may be in direct contact with the partition 2001 or indirect contact with the partition 2001. For example, one of the outer surfaces of the flange 70 is disposed opposite to and in direct contact with one of the outer surfaces of the partition 2001. For another example, a connection structure is disposed between the flange 70 and the partition 2001 and abuts against two adjacent side surfaces of the flange 70 and the partition 2001.

[0284] Please refer to Fig.34 and 35In some embodiments, the first housing 310 includes a chassis 2003, and the mounting frame 2004 is disposed on the chassis 2003. Thus, the chassis 2003 can be used to support and fix the mounting frame 2004, thereby maintaining the stability of the mounting frame 2004, and further ensuring the stability of the centrifugal fan 1000.

[0285] Please refer to Fig.36 and Fig.37 In some embodiments, the partition plate 2001 is provided with a through hole 2005 , and the outer contour size of the flange 70 is larger than the size of the through hole 2005 .

[0286] In this way, since the outer contour size of the flange 70 is larger than the size of the through hole 2005, this means that when the volute 100 passes through the through hole 2005 of the partition 2001, the edge of the flange 70 will fit tightly with the edge of the through hole 2005, thereby ensuring the sealing between the flange 70 and the partition 2001 and preventing airflow leakage.

[0287] Specifically, the shape of the via hole 2005 can be a regular shape such as a square, a circle, or an irregular shape. The shape of the via hole 2005 can match the shape of the flange 70. For example, the outer contour of the flange 70 can form a square, and the edge contour of the via hole 2005 can form a square. The size of the orthographic projection of the square formed by the outer contour of the via hole 2005 can be smaller than the size of the orthographic projection of the square formed by the outer contour of the flange 70.

[0288] In some embodiments, the flange 70 is in contact with the partition 2001. In other words, the flange 70 is in direct contact with the partition 2001.

[0289] In this way, the flange 70 and the partition plate 2001 fit together to ensure that there is no obvious gap 15 between the two, thereby improving the sealing performance and preventing gas leakage.

[0290] Please refer to Fig.36 In some embodiments, a seal 2006 is provided between the flange 70 and the partition 2001. In other words, the flange 70 and the partition 2001 are in indirect contact.

[0291] In this way, the seal 2006 can compensate for the slight manufacturing error between the flange 70 and the partition 2001, thereby significantly improving the sealing performance between the flange 70 and the partition 2001 and effectively preventing gas leakage.

[0292] Specifically, the seal 2006 can be a compressible sponge, rubber or other compressible sealing material. The seal 2006 can be a sealing ring, a sealing sheet, a sealing strip or a sealing gasket of a customized shape. The seal 2006 can also be a sealing structural adhesive coated between the flange 70 and the partition 2001. The sealing structural adhesive can be a soluble structural adhesive, and the soluble structural adhesive can be dissolved in an organic solvent or other solvents. Among them, the soluble sealant can be a silicone sealant, an epoxy resin sealant, etc. The organic solvent can be an acetone solution, a methanol solution, etc.

[0293] Please refer to Fig.38 In some embodiments, the mounting frame 2004 includes two cross beams 2007 that are spaced apart from each other, and the volute 100 is mounted on the two cross beams 2007 .

[0294] In this way, by setting two cross beams 2007 at intervals, a more stable and uniform support can be provided for the volute 100, and the vibration of the volute 100 during the operation of the HVAC indoor unit 2100 can be reduced, thereby reducing noise, and improving the installation rigidity, thereby enhancing the structural stability of the entire HVAC indoor unit 2100.

[0295] Specifically, the two crossbeams 2007 can be parallel to each other to facilitate the installation and positioning of the volute 100. The volute 100 can be installed on the crossbeam 2007 in a detachable manner such as threaded connection and clamping, or can be installed on the crossbeam 2007 in a non-detachable manner such as welding and riveting. For example, corresponding threaded holes can be provided on the crossbeam 2007 and the volute 100, and the volute 100 can be installed on the crossbeam 2007 by using components such as screws or bolts. High-precision threaded holes can be provided on the crossbeam 2007 to meet the high-precision installation requirements of the volute 100. For another example, the corresponding areas of the crossbeam 2007 and the volute 100 can be connected by welding.

[0296] Please refer to Fig.38 In some embodiments, the volute 100 includes a support foot 40, the support foot 40 rests on the cross beam 2007, and the support foot 40 is fixedly connected to the cross beam 2007 via a fastening element.

[0297] In this way, the fastening element can improve the connection stability between the support foot 40 and the crossbeam 2007, thereby reducing the vibration of the volute 100 during the operation of the HVAC indoor unit 2100, thereby reducing noise. In addition, the design of the support foot 40 provides an additional support point for the volute 100, enhancing the strength of the entire structure, especially when subjected to dynamic loads.

[0298] Specifically, the crossbeam 2007 can be used to support and fix the legs 40. The crossbeam 2007 and the legs 40 can be provided with corresponding threaded holes, and the legs 40 can be fixedly connected to the crossbeam 2007 by using fastening elements. The fastening elements can include threads, screws, nuts, rivets or washers.

[0299] The number of the legs 40 may be one or more, such as two, three, four or even more. For example, the number of the legs 40 may be two, and the two legs 40 may be spaced apart along the length direction of the volute 100, and each leg 40 is fixedly connected to the cross beam 2007 via a fastening element. The fastening elements used between different legs 40 and the cross beam 2007 may be the same or different.

[0300] Please refer to Fig.33 In some embodiments, the HVAC indoor unit 2100 further includes a motor 2008 , which is mounted on the mounting frame 2004 , and an output shaft 2009 of the motor 2008 is connected to the impeller 200 .

[0301] In this way, the motor 2008 and the volute 100 of the centrifugal fan 1000 are both installed on the mounting frame 2004, so there is no need to set up an additional mounting structure for the motor 2008, which can improve the space utilization of the HVAC indoor unit 2100 and reduce the manufacturing cost of the HVAC indoor unit 2100.

[0302] Specifically, the motor 2008 is the power source of the HVAC indoor unit 2100, and is used to convert electrical energy into mechanical energy, and can drive the impeller 200 to rotate. The motor 2008 can be a DC motor, an AC motor, or a brushless motor, etc. The motor 2008 can be installed on the mounting frame 2004 in a detachable manner such as threaded connection or clamping, or can be installed on the mounting frame 2004 in an irremovable manner such as riveting or welding.

[0303] The connection between the output shaft 2009 of the motor 2008 and the impeller 200 may be through direct connection, coupling, or belt transmission, etc. For example, one end of the output shaft 2009 of the motor 2008 is connected to one end of the coupling, and the impeller 200 is connected to the other end of the coupling, so that the mechanical energy output by the motor 2008 is transmitted through the coupling.

[0304] Please refer to Fig.33 In some embodiments, the motor 2008 and the centrifugal fan 1000 are mounted on the same plane of the mounting frame 2004. For example, the motor 2008 and the centrifugal fan 1000 can both be mounted on the top surface of the mounting frame 2004. Of course, the motor 2008 and the centrifugal fan 1000 can also be mounted on other planes of the mounting frame 2004, and the embodiments of the present invention are not limited to this.

[0305] In this way, the motor 2008 and the volute 100 of the centrifugal fan 1000 are installed on the same reference plane, which avoids the eccentricity and tilt problems caused by the different assembly references of the centrifugal fan 1000 and the motor 2008, thereby improving the overall output air volume and air outlet efficiency of the centrifugal fan 1000 and reducing the noise generated during the operation of the centrifugal fan 1000.

[0306] Please refer to Fig.39 and Fig.40 In some embodiments, the mounting frame 2004 includes a mounting plate 2010 and a bearing portion 2011 arched from the mounting plate 2010 , the bearing portion 2011 includes a bearing surface 2012 , and the motor 2008 and the centrifugal fan 1000 are mounted on the bearing surface 2012 .

[0307] In this way, the motor 2008 and the centrifugal fan 1000 are installed on the arched bearing surface 2012, which is conducive to air circulation and heat dissipation, thereby improving the heat dissipation effect of the motor 2008 and the centrifugal fan 1000 and improving the operating efficiency of the motor 2008 and the centrifugal fan 1000.

[0308] Specifically, the mounting piece 2010 can be fixedly connected to the chassis 2003. The mounting piece 2010 can be fixedly connected to the chassis 2003 in a detachable manner such as threaded connection or clamping, or can be fixedly connected to the chassis 2003 in an irremovable manner such as welding or riveting. The bearing portion 2011 can be arched from the mounting piece 2010 to a side away from the chassis 2003.

[0309] The bearing portion 2011 can be used to support the motor 2008 and the centrifugal fan 1000. The arched shape of the bearing portion 2011 can be an arc, a fold line or other shapes to provide sufficient space and stability. The number of the bearing portions 2011 can be multiple, and the multiple bearing portions 2011 can be arranged at intervals along the arrangement direction of the motor 2008 and the centrifugal fan 1000. The centrifugal fan 1000 and the motor 2008 can be installed on the bearing surface 2012 in a detachable manner such as threaded connection and clamping, or can be installed on the bearing surface 2012 in an irremovable manner such as welding and riveting.

[0310] Please refer to Fig.33 and Fig.34 In some embodiments, the number of the centrifugal fans 1000 is two, the two centrifugal fans 1000 are arranged in parallel and spaced apart, the motor 2008 is arranged between the two centrifugal fans 1000, and the motor 2008 is used to drive the impellers 200 of the two centrifugal fans 1000 to rotate simultaneously.

[0311] In this way, by providing two parallel and spaced centrifugal fans 1000 , the total airflow output of the HVAC indoor unit 2100 can be increased, and the operating efficiency of the HVAC indoor unit 2100 can be improved.

[0312] The motor 2008 is arranged between the two centrifugal fans 1000, which can optimize the spatial layout, make the whole system more compact, and reduce the overall floor space. The motor 2008 drives the impellers 200 of the two centrifugal fans 1000 to rotate at the same time, which can reduce energy consumption, because one motor 2008 can provide power for two fans at the same time, which is more energy-efficient than two independent motor 2008 systems. In addition, one motor 2008 controls two centrifugal fans 1000 at the same time, which simplifies the design of the control system and reduces the complexity and cost of the control system. In addition, since the two centrifugal fans 1000 are driven by the same motor 2008, the rotation speed and operating state of the two fans can be guaranteed to be synchronized, thereby improving the operating stability of the whole system.

[0313] Specifically, the motor 2008 may be a multi-phase motor 2008 to provide sufficient torque to drive two impellers 200 simultaneously.

[0314] In certain embodiments, Figure 2 The first butt joint portion 71 and the second butt joint portion 72 shown are both in contact with the partition 2001. Since the first butt joint portion 71 is provided with a first limit portion 711, and both ends of the second butt joint portion 72 are provided with second limit portions 721, the first limit portion 711 and the second limit portion 721 are matched and connected to limit the two side plates 10 from moving away from each other. Therefore, the first butt joint portion 71 and the second butt joint portion 72 can ensure that the two side plates 10 will not move away from each other, which can ensure the stability of the butt joint between the flange 70 as a whole and the partition 2001.

[0315] Please refer to Fig.30 In some embodiments, the HVAC indoor unit 2100 further includes an indoor heat exchanger 420, which is disposed in the second housing 410, and the first housing 310 is detachably connected to the second housing 410. In this way, since the first housing 310 and the second housing 410 are detachably connected, during the installation process, the volute 100 can be installed first and then the second housing 410 provided with the indoor heat exchanger 420 can be installed, so that the installation position of the volute 100 does not need to be repeatedly adjusted.

[0316] In the description of this specification, the description with reference to the terms "one embodiment", "certain embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0317] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A HVAC indoor unit, characterized in that: include: The first box; A second box body is connected to the first box body, a partition, the partition being arranged between the first box body and the second box body; A mounting frame, the mounting frame is disposed in the first box; A centrifugal fan is arranged in the first housing, and comprises a volute, an impeller and a flange. The volute is mounted on the mounting frame and penetrates the partition. The impeller is accommodated in the volute. The flange is arranged on the volute and abuts against the partition.

2. The HVAC indoor unit according to claim 1, characterized in that: The partition is provided with a through hole, and the outer contour size of the flange is larger than the size of the through hole.

3. The HVAC indoor unit according to claim 1, characterized in that: The flange is in contact with the partition.

4. The HVAC indoor unit according to claim 1, characterized in that: A sealing member is provided between the flange and the partition.

5. The HVAC indoor unit according to claim 1, characterized in that: The mounting frame comprises two cross beams arranged at intervals, and the volute is mounted on the two cross beams.

6. The HVAC indoor unit according to claim 5, characterized in that: The volute comprises a support foot, the support foot rests on the cross beam, and the support foot is fixedly connected to the cross beam via a fastening element.

7. The HVAC indoor unit according to claim 1, characterized in that: The HVAC indoor unit also includes a motor, which is mounted on the mounting frame, and an output shaft of the motor is connected to the impeller.

8. The HVAC indoor unit according to claim 7, characterized in that: The motor and the centrifugal fan are installed on the same plane of the mounting frame.

9. The HVAC indoor unit according to claim 8, characterized in that: The mounting frame includes a mounting plate and a bearing portion arched from the mounting plate, the bearing portion includes a bearing surface, and the motor and the centrifugal fan are mounted on the bearing surface.

10. The HVAC indoor unit according to claim 7, characterized in that: There are two centrifugal fans, which are arranged in parallel and spaced apart. The motor is arranged between the two centrifugal fans, and the motor is used to drive the impellers of the two centrifugal fans to rotate simultaneously.

11. The HVAC indoor unit according to claim 1, characterized in that: The first box body comprises a chassis, and the mounting frame is arranged on the chassis.

12. The HVAC indoor unit according to claim 1, characterized in that: The volute comprises: Two side panels arranged opposite to each other; The enclosure is arranged between the two side panels, the two side panels are detachably connected to the enclosure, and the flange is arranged around the two side panels and the enclosure.

13. The HVAC indoor unit according to claim 12, characterized in that: The flange includes a first docking portion and a second docking portion, the first docking portion is fixedly connected to the side plate, the second docking portion is detachably connected to the two first docking portions, and the first docking portion and the second docking portion are both in contact with the partition.

14. The HVAC indoor unit according to claim 13, characterized in that: The first docking portion and the side plate are an integrally formed structure.

15. The HVAC indoor unit according to claim 13, characterized in that: The first docking portion is provided with an inserting groove, and the end of the second docking portion is inserted into the inserting groove.

16. The HVAC indoor unit according to claim 15, characterized in that: One of the slot wall of the plug-in slot and the end of the second docking portion is provided with a clamping slot, and the other is provided with a clamping block, and the clamping block is clamped in the clamping slot.

17. The HVAC indoor unit according to claim 15, characterized in that: The plug-in slot has an insertion port, the insertion port is arranged away from the side plate, and the second docking portion is used to be inserted into the plug-in slot through the insertion port.

18. The HVAC indoor unit according to claim 13, characterized in that: The first docking portion is provided with a first limiting portion, and both ends of the second docking portion are provided with second limiting portions, and the first limiting portion and the second limiting portion are cooperatively connected to limit the two side panels from moving away from each other.

19. The HVAC indoor unit according to claim 18, characterized in that: The first limiting portion includes a first limiting piece, the second limiting portion includes a second limiting piece, the first limiting piece abuts against the second limiting piece, and two of the first limiting pieces are located between two of the second limiting pieces.

20. The HVAC indoor unit according to claim 13, characterized in that: The flange further includes a third docking portion detachably connected to the first docking portion, and the third docking portion and the second docking portion are respectively located on two opposite sides of the volute.

21. The HVAC indoor unit according to claim 12, characterized in that: The side panels are plastic panels, and the enclosure panels are metal panels.

22. The HVAC indoor unit according to claim 1, characterized in that: The HVAC indoor unit further includes an indoor heat exchanger, which is disposed in the second box, and the first box is detachably connected to the second box.

23. The HVAC indoor unit according to claim 1, characterized in that: The partition is fixedly connected to the first box body.

24. A HVAC system, characterized in that: It comprises the HVAC indoor unit as described in any one of claims 1-19.

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