Air conditioner motor and air conditioner indoor unit

Abstract

The invention belongs to the field of air conditioner motors, and particularly relates to an air conditioner motor and an air conditioner indoor unit, the air conditioner motor comprises a stator assembly, an oil bearing and a rotor assembly, the structure is simple, the rotor assembly is integrally formed on a cross-flow wind wheel, the air conditioner motor and the cross-flow wind wheel do not need to be connected through a fastener during follow-up assembly, and the assembly efficiency is improved. The oil-retaining bearing is arranged in the central positioning cylinder of the stator assembly, and during assembly, only the connecting shaft in the rotor assembly needs to be inserted into the oil-retaining bearing, so that the installation is simple and convenient, and the production and assembly efficiency of the indoor unit of the air conditioner is greatly improved.

Description

Technical Field

[0001] The present application relates to the technical field of air-conditioning motors, and in particular to an air-conditioning motor and an air-conditioning indoor unit. Background Art

[0002] Nowadays, most offices or homes are equipped with air conditioners, which have the functions of cooling and heating the environment. The motors driving the crossflow impellers in the existing air conditioner indoor units mostly use the motors disclosed in patent CN101553970A, such as Figure 8 As shown, the motor shaft and the motor bracket are rotationally connected through two ball bearings, and the motor shaft and the wind wheel need to be fixed through an E-type clamping ring and a locking screw, which is inconvenient to install and has low assembly efficiency. Summary of the invention

[0003] The embodiments of the present application provide an air-conditioning motor and an air-conditioning indoor unit, which are intended to achieve simple installation between the air-conditioning motor and the crossflow impeller and improve production efficiency.

[0004] To this end, according to one aspect of the present application, an air conditioning motor is provided for driving a crossflow fan wheel to rotate, and the air conditioning motor comprises:

[0005] The stator assembly comprises a stator base and a stator winding, wherein the stator base has a center positioning cylinder, and the stator winding is sleeved and fixed on the outer side of the center positioning cylinder;

[0006] An oil-containing bearing, disposed inside the center positioning cylinder; and

[0007] The rotor assembly includes an end cover integrally injection-molded with one end of a crossflow impeller, a magnetic ring arranged on the outside of the end cover, and a connecting shaft fixed to the end cover. The crossflow impeller, the magnetic ring and the connecting shaft are coaxially arranged, and the end of the connecting shaft away from the end cover is inserted into the oil-containing bearing and rotatably connected to the oil-containing bearing. The magnetic ring is coaxially sleeved on the outside of the stator winding and has a gap between the stator winding.

[0008] Optionally, the end cover comprises a cover body integrally formed with one end of the crossflow impeller, and an inner cylinder and an outer cylinder integrally formed on a side of the cover body away from the crossflow impeller, the connecting shaft is arranged perpendicular to the cover body, the inner cylinder and the outer cylinder are coaxial with the connecting shaft, and there is a distance between the inner cylinder and the outer cylinder; in the axial direction, the length of the inner cylinder is smaller than the length of the outer cylinder, and the magnetic ring is fixed to the inner side of the inner cylinder;

[0009] The stator assembly also includes an outer shell, which is a cylindrical structure with one end open and the other end closed. The stator base is embedded and fixed in the outer shell. The outer shell is inserted between the outer side of the magnetic ring and the inner side of the outer cylinder at one end facing the rotor assembly, and gaps are provided between the outer shell, the magnetic ring and the outer cylinder to form a labyrinth dustproof structure.

[0010] Optionally, the connecting shaft and the end cover as well as the magnetic ring and the end cover are integrally formed by injection molding.

[0011] Optionally, the stator winding is plastic-sealed on the stator base by BMC material.

[0012] Optionally, mounting ears are symmetrically arranged on the outer wall of the shell, and mounting holes are provided on the mounting ears, and the mounting ears are used to fix the shell to the outside.

[0013] Optionally, the oil-containing bearing includes a bearing body and a retaining ring, the bearing body is a cylindrical structure, a circle of annular protrusions is circumferentially provided inside the bearing body, a plurality of oil storage grooves are circumferentially spaced apart at one end of the annular protrusion inserted toward the connecting shaft, the oil storage grooves are filled with lubricating grease, each of the oil storage grooves extends to the inner wall of the annular protrusion through a flow channel, the retaining ring is arranged at the end of the annular protrusion inserted toward the connecting shaft, and the retaining ring is used to shield the oil storage groove and the flow channel in the axial direction.

[0014] Optionally, an annular groove is provided at one end of the outer wall of the bearing body away from the insertion end of the connecting shaft, a conical guide portion is provided at one end of the bearing body away from the insertion end of the connecting shaft, and an annular convex is provided on the inner wall of the center positioning cylinder, and the annular convex is engaged with the annular groove.

[0015] Optionally, the bearing body is made of PP material, the retaining ring is made of POM material, and there is an interference fit between the retaining ring and the bearing body.

[0016] According to another aspect of the present application, an air-conditioning indoor unit is provided, comprising the air-conditioning motor as described above.

[0017] The beneficial effects of the air-conditioning motor and the air-conditioning indoor unit provided by the present application are as follows: compared with the prior art, the air-conditioning motor of the present application includes three parts: a stator assembly, an oil-containing bearing and a rotor assembly, and has a simple structure. By integrally forming the rotor assembly on the crossflow impeller, the air-conditioning motor and the crossflow impeller do not need to be connected by fasteners during subsequent assembly. An oil-containing bearing is provided in the central positioning cylinder of the stator assembly. During assembly, it is only necessary to insert the connecting shaft in the rotor assembly into the oil-containing bearing. The installation is simple and convenient, which greatly improves the production and assembly efficiency of the air-conditioning indoor unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] in:

[0020] Figure 1 is a schematic diagram of the three-dimensional structure of an air-conditioning motor shown in an embodiment of the present application;

[0021] Figure 2 is a schematic cross-sectional structural diagram of an air-conditioning motor shown in an embodiment of the present application;

[0022] Figure 3 It is a three-dimensional structural schematic diagram of a stator assembly and a rotor assembly separated in an air-conditioning motor shown in an embodiment of the present application;

[0023] Figure 4 It is a schematic diagram of the exploded structure of an air-conditioning motor shown in one embodiment of the present application;

[0024] Figure 5 It is a schematic diagram of the three-dimensional structure of the stator winding after plastic sealing in the stator assembly of the air-conditioning motor shown in one embodiment of the present application;

[0025] Figure 6 It is a schematic cross-sectional structure diagram of an oil-containing bearing in an air-conditioning motor shown in an embodiment of the present application;

[0026] Figure 7 yes Figure 6 AA section structural diagram;

[0027] Figure 8 It is a schematic diagram of the existing air-conditioning motor structure and the connection between it and the cross-flow impeller.

[0028] Description of main component symbols:

[0029] 10. Crossflow impeller;

[0030] 100. stator assembly;

[0031] 110, stator base; 111, center positioning cylinder; 1111, annular clamping protrusion;

[0032] 120. Stator winding;

[0033] 130. housing; 131. mounting ear;

[0034] 200, oil-containing bearings;

[0035] 210, bearing body; 211, annular protrusion; 2111, oil storage tank; 2112, flow channel; 212, ring

[0036] Shaped card slot;

[0037] 220, retaining ring;

[0038] 300, rotor assembly;

[0039] 310. End cover; 311. Cover body; 312. Inner cylinder body; 313. Outer cylinder body;

[0040] 320, magnetic ring;

[0041] 330. Connecting shaft. DETAILED DESCRIPTION

[0042] In order to facilitate the understanding of the present application, the present application will be described more comprehensively with reference to the relevant drawings below. The preferred embodiments of the present application are provided in the drawings. However, the present application can be implemented in many other different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive.

[0043] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0044] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply 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 a limitation on the present application. In the description of the present application, "plurality" means two or more, unless otherwise clearly and specifically defined.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0046] It should also be noted that, in the embodiments of the present application, the same figure mark is used to represent the same component or the same part. For the same parts in the embodiments of the present application, the figure may only mark one of the parts or components as an example. It should be understood that the figure mark also applies to other identical parts or components.

[0047] As described in the background art, in the related art, such as Figure 8 As shown, the motor shaft and the motor bracket are rotationally connected through two ball bearings, and the motor shaft and the wind wheel need to be fixed through an E-type clamping ring and a locking screw, which is inconvenient to install and has low assembly efficiency.

[0048] In order to solve the above problems, according to one aspect of the present application, an embodiment of the present application provides an air-conditioning motor for driving a crossflow fan wheel to rotate, such as Figure 1-Figure 4 As shown, the air conditioner motor includes a stator assembly 100, an oil-containing bearing 200 and a rotor assembly 300. The stator assembly 100 includes a stator base 110 and a stator winding 120. The stator base 110 has a center positioning cylinder 111. The stator winding 120 is sleeved and fixed on the outside of the center positioning cylinder 111. The oil-containing bearing 200 is arranged inside the center positioning cylinder 111. The rotor assembly 300 includes an end cap 310 integrally injection-molded with one end of the crossflow impeller 10, a magnetic ring 320 arranged on the outside of the end cap 310, and a connecting shaft 330 fixed on the end cap 310. The crossflow impeller 10, the magnetic ring 320 and the connecting shaft 330 are coaxially arranged. The end of the connecting shaft 330 away from the end cap 310 is inserted into the oil-containing bearing 200 and is rotatably connected to the oil-containing bearing 200. The magnetic ring 320 is coaxially sleeved on the outside of the stator winding 120 and has a gap with the stator winding 120.

[0049] In the embodiment of the present application, the air-conditioning motor includes three parts, namely a stator assembly 100, an oil-containing bearing 200 and a rotor assembly 300, and has a simple structure. By integrally forming the rotor assembly 300 on the crossflow impeller 10, the air-conditioning motor and the crossflow impeller 10 do not need to be connected by fasteners during subsequent assembly. The oil-containing bearing 200 is provided in the central positioning cylinder 111 of the stator assembly 100. During assembly, it is only necessary to insert the connecting shaft 330 in the rotor assembly 300 into the oil-containing bearing 200. The installation is simple and convenient, which greatly improves the assembly efficiency.

[0050] In one embodiment, if Figure 2 and Figure 3As shown, the end cover 310 includes a cover body 311 integrally formed with one end of the crossflow wind wheel 10 and an inner cylinder 312 and an outer cylinder 313 integrally formed on the side of the cover body 311 away from the crossflow wind wheel 10, the connecting shaft 330 is arranged perpendicular to the cover body 311, the inner cylinder 312 and the outer cylinder 313 are both coaxial with the connecting shaft 330, and there is a distance between the inner cylinder 312 and the outer cylinder 313; in the axial direction, the length of the inner cylinder 312 is smaller than the length of the outer cylinder 313, and the magnetic ring 320 is fixed to the inner side of the inner cylinder 312.

[0051] Preferably, the connecting shaft 330 and the end cover 310 as well as the magnetic ring 320 and the end cover 310 are integrally formed by injection molding. Specifically, during production, the connecting shaft 330 and the magnetic ring 320 are pre-fixed in appropriate positions in the mold, and then injected with plastic for molding. After the mold is opened, the connecting shaft 330 and the magnetic ring 320 are integrally molded by the cooled and solidified plastic.

[0052] The stator assembly 100 also includes a shell 130, which is a cylindrical structure with one end open and the other end closed. The stator base 110 is embedded and fixed in the shell 130. The end of the shell 130 facing the rotor assembly 300 is inserted between the outer side of the magnetic ring 320 and the inner side of the outer cylinder 313, and gaps are provided between the shell 130 and the magnetic ring 320 and between the shell 130 and the outer cylinder 313 to form a labyrinth dustproof structure, thereby improving the dustproof ability of the air-conditioning motor.

[0053] In a specific embodiment, Figure 5 As shown, the stator winding 120 is molded on the stator base 110 by BMC material.

[0054] According to the above design, by plastic sealing the stator winding 120 on the stator base 110, it is not only waterproof, dustproof and high temperature resistant, but also can enhance the rigidity of the stator assembly 100, so that it has less vibration during operation. At the same time, since the rotor assembly 300 is also integrally injection-molded with the crossflow impeller 10, the rigidity is also stronger, the vibration is significantly reduced, and the noise is better improved.

[0055] Among them, BMC material, namely Bulk Molding Compound, is a composite material formed by mixing glass fiber, filler, resin and additives evenly and then extruding. It has the characteristics of high strength, high temperature resistance, corrosion resistance, high density, etc., and is widely used in various fields.

[0056] In a specific embodiment, Figure 1 and Figure 4As shown, mounting ears 131 are symmetrically arranged on the outer wall of the housing 130, and mounting holes are arranged on the mounting ears 131. The mounting ears 131 are used to fix the housing 130 to the outside. The housing 130 can be fixed to the rack of the wall-mounted machine using screws through the mounting ears 131 and the mounting holes thereon, which is easy to install.

[0057] In one embodiment, if Figure 6-Figure 7 As shown, the oil-containing bearing 200 includes a bearing body 210 and a retaining ring 220. The bearing body 210 is a cylindrical structure. The bearing body 210 is provided with a circle of annular protrusions 211 along the circumferential direction. The end of the annular protrusion 211 inserted toward the connecting shaft 330 is provided with a plurality of oil storage grooves 2111 along the circumferential direction. The oil storage grooves 2111 are filled with lubricating grease (the model can be COMC 2#). Each oil storage groove 2111 extends to the inner wall of the annular protrusion 211 through a flow channel 2112, and the lubricating grease flows to the contact part between the connecting shaft 330 and the inner wall of the annular protrusion 211 to play a lubricating role. The retaining ring 220 is provided at the end of the annular protrusion 211 inserted toward the connecting shaft 330. The retaining ring 220 is used to block the oil storage groove 2111 and the flow channel 2112 in the axial direction to prevent the lubricating grease from leaking from the end of the annular protrusion 211 inserted toward the connecting shaft 330.

[0058] In a specific embodiment, in combination Figure 2 and Figure 6 As shown, an annular groove 212 is provided at the end of the outer wall of the bearing body 210 away from the insertion of the connecting shaft 330, a conical guide portion is provided at the end of the bearing body 210 away from the insertion of the connecting shaft 330, and an annular locking protrusion 1111 is provided on the inner wall of the center positioning cylinder 111, and the annular locking protrusion 1111 is engaged with the annular groove 212.

[0059] According to the arrangement, when assembling the oil-containing bearing 200, the end of the bearing body 210 of the oil-containing bearing 200 provided with the conical guide portion is inserted into the central positioning cylinder 111 of the stator base 110, and an external force is applied to press so that the conical guide portion passes over the annular clamping protrusion 1111, and the annular clamping protrusion 1111 is clamped into the annular clamping groove 212. The assembly is convenient and the fixation is reliable.

[0060] Specifically, the bearing body 210 is made of PP (Polypropylene, PP for short), and the retaining ring 220 is made of POM, and the retaining ring 220 and the bearing body 210 are interference fit. Polyformaldehyde (English: polyformaldehyde) is a thermoplastic crystalline polymer, suitable for making wear-reducing and wear-resistant parts, transmission parts, and chemical and instrument parts. It has the characteristics of high rigidity and high wear resistance. It is mainly used in products that play a skeleton role, such as gears, bearings, automotive parts, machine tools, and instrument internals.

[0061] According to another aspect of the present application, an embodiment of the present application further provides an air-conditioning indoor unit, comprising an air-conditioning motor in any of the above embodiments.

[0062] Since the air-conditioning motor in the above embodiment is adopted, the air-conditioning indoor unit also has the advantages of convenient assembly and high assembly efficiency.

[0063] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0064] The above embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. An air conditioning motor, used to drive a crossflow fan wheel to rotate, characterized in that: The air conditioning motor comprises: The stator assembly comprises a stator base and a stator winding, wherein the stator base has a center positioning cylinder, and the stator winding is sleeved and fixed on the outer side of the center positioning cylinder; An oil-containing bearing, disposed inside the center positioning cylinder; and The rotor assembly includes an end cover integrally injection-molded with one end of a crossflow impeller, a magnetic ring arranged on the outside of the end cover, and a connecting shaft fixed to the end cover. The crossflow impeller, the magnetic ring and the connecting shaft are coaxially arranged, and the end of the connecting shaft away from the end cover is inserted into the oil-containing bearing and rotatably connected to the oil-containing bearing. The magnetic ring is coaxially sleeved on the outside of the stator winding and has a gap between the stator winding.

2. The air conditioning motor according to claim 1, characterized in that: The end cover comprises a cover body integrally formed with one end of the crossflow impeller, and an inner cylinder and an outer cylinder integrally formed on a side of the cover body away from the crossflow impeller, the connecting shaft is arranged perpendicular to the cover body, the inner cylinder and the outer cylinder are coaxial with the connecting shaft, and there is a distance between the inner cylinder and the outer cylinder; in the axial direction, the length of the inner cylinder is smaller than the length of the outer cylinder, and the magnetic ring is fixed to the inner side of the inner cylinder; The stator assembly also includes an outer shell, which is a cylindrical structure with one end open and the other end closed. The stator base is embedded and fixed in the outer shell. The outer shell is inserted between the outer side of the magnetic ring and the inner side of the outer cylinder at one end facing the rotor assembly, and gaps are provided between the outer shell, the magnetic ring and the outer cylinder to form a labyrinth dustproof structure.

3. The air conditioning motor according to claim 1 or 2, characterized in that: The connection shaft and the end cover as well as the magnetic ring and the end cover are integrally formed by injection molding.

4. The air conditioning motor according to claim 1 or 2, characterized in that: The stator winding is plastic-sealed on the stator base by means of BMC material.

5. The air conditioning motor according to claim 2, characterized in that: The outer wall of the shell is symmetrically provided with mounting ears, each of which is provided with a mounting hole, and the mounting ears are used to fix the shell to the outside.

6. The air conditioning motor according to claim 1, characterized in that: The oil-containing bearing includes a bearing body and a retaining ring. The bearing body is a cylindrical structure. A circle of annular protrusions is circumferentially provided inside the bearing body. A plurality of oil storage grooves are circumferentially spaced apart at one end of the annular protrusion inserted toward the connecting shaft. The oil storage grooves are filled with lubricating grease. Each of the oil storage grooves extends to the inner wall of the annular protrusion through a flow channel. The retaining ring is provided at the end of the annular protrusion inserted toward the connecting shaft. The retaining ring is used to shield the oil storage groove and the flow channel in the axial direction.

7. The air conditioning motor according to claim 6, characterized in that: An annular groove is provided on the outer wall of the bearing body at one end away from the insertion of the connecting shaft, a conical guide portion is provided on the end of the bearing body away from the insertion of the connecting shaft, and an annular protrusion is provided on the inner wall of the center positioning cylinder, which is engaged with the annular groove.

8. The air conditioning motor according to claim 6, characterized in that: The bearing body is made of PP material, the retaining ring is made of POM material, and there is interference fit between the retaining ring and the bearing body.

9. An air conditioner indoor unit, characterized in that: It comprises the air conditioning motor as described in any one of claims 1 to 8.

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