Motor and air conditioner including same

Abstract

This motor comprises: a stator; a rotor shaft disposed at the center of the stator; and a rotor coupled to the rotor shaft and provided to rotate about the rotor shaft by electromagnetically interacting with the stator. The rotor includes: a plurality of rotor cores disposed to be spaced apart from each other along the circumferential direction of the rotor shaft and stacked in a direction in which the rotor shaft extends; a magnet disposed between the plurality of rotor cores; and a bridge formed in some intermediate layers of the stacked rotor cores to connect the inner diameters of the plurality of rotor cores. The upper end of the bridge is vertically spaced apart from the upper ends of the plurality of rotor cores, and the lower end of the bridge is vertically spaced apart from the lower ends of the plurality of rotor cores.

Description

Motor and air conditioner including the same

[0001] The present disclosure relates to a motor and an air conditioner including the same, and more specifically, to a motor including a bridge having an improved structure and an air conditioner including the same.

[0002] An air conditioner is a device used for indoor cooling or heating purposes. It utilizes a conventional refrigeration cycle in which refrigerant circulates between indoor and outdoor units, and performs cooling or heating operations based on the characteristic that the liquid refrigerant absorbs ambient heat when vaporizing and releases that heat when liquefying.

[0003] The main components constituting the refrigeration cycle include a compressor, condenser, evaporator, and blower fan. To facilitate the absorption and release of heat, fans are installed in both the indoor and outdoor units, and motors are used to regulate the airflow.

[0004] A motor is a machine that obtains rotational force from electrical energy and includes a stator and a rotor. The rotor is configured to interact electromagnetically with the stator and rotates by the force acting between a magnetic field and an electric current flowing through a coil.

[0005] The motor may include a stator, a rotor axis, a rotor arranged to rotate about the rotor axis, and a motor body that accommodates the stator and the rotor.

[0006] One aspect of the present disclosure provides a motor with an improved structure to reduce leakage of magnetic flux generated from a permanent magnet, and an air conditioner including the same.

[0007] One aspect of the present disclosure provides a motor with an improved structure to prevent breakage and / or deformation of the bridge during the press-fitting process of the rotor shaft, and an air conditioner including the same.

[0008] One aspect of the present disclosure provides a motor with an improved structure to prevent scattering of the rotor core and an air conditioner including the same.

[0009] The technical problems to be solved in this document are not limited to those mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art to which this invention belongs from the description below.

[0010] A motor according to one embodiment includes a stator, a rotor shaft disposed at the center of the stator, and a rotor coupled to the rotor shaft and arranged to rotate about the rotor shaft by electromagnetically interacting with the stator. The rotor includes a plurality of rotor cores disposed spaced apart along the circumferential direction of the rotor shaft and stacked in the direction in which the rotor shaft extends, a magnet disposed between the plurality of rotor cores, and a bridge formed in a partial layer in the middle of the stacked rotor cores to connect the inner diameters of the plurality of rotor cores. The upper end of the bridge is spaced vertically apart from the upper end of the plurality of rotor cores, and the lower end of the bridge is spaced vertically apart from the lower end of the plurality of rotor cores.

[0011] An air conditioner including a motor according to one embodiment comprises a stator, a rotor shaft disposed at the center of the stator, and a rotor fixedly coupled to the rotor shaft and arranged to rotate about the rotor shaft by electromagnetically interacting with the stator. The rotor comprises a plurality of rotor cores disposed spaced apart along the circumferential direction of the rotor shaft and stacked in the direction in which the rotor shaft extends, magnets connected to the rotor cores by UV-curing bonds between the plurality of rotor cores, and a rotor housing integrally combining the plurality of rotor cores and the magnets. Each of the plurality of rotor cores is characterized by being separated.

[0012] FIG. 1 is a drawing illustrating an air conditioner according to one embodiment of the present disclosure.

[0013] FIG. 2 is a drawing illustrating a motor according to one embodiment of the present disclosure.

[0014] FIG. 3 is a disassembled drawing of a motor according to one embodiment of the present disclosure.

[0015] FIG. 4 is a drawing illustrating a motor body according to one embodiment of the present disclosure.

[0016] FIG. 5 is a cross-sectional view of a part of a motor body according to one embodiment of the present disclosure.

[0017] FIG. 6 illustrates a part of a rotor according to one embodiment of the present disclosure.

[0018] FIG. 7 is a disassembled view of a rotor according to one embodiment of the present disclosure.

[0019] FIG. 8 is a cross-sectional view of a part of a rotor according to one embodiment of the present disclosure.

[0020] FIG. 9 is a perspective view of a rotor shaft according to one embodiment of the present disclosure.

[0021] FIG. 10 is a cross-sectional view of a rotor housing according to one embodiment of the present disclosure.

[0022] FIG. 11 is a perspective view of a rotor according to one embodiment of the present disclosure.

[0023] FIG. 12 is a plan view of a rotor according to one embodiment of the present disclosure.

[0024] FIG. 13 is a perspective view of a rotor core according to one embodiment of the present disclosure.

[0025] The various embodiments of this document and the terms used therein are not intended to limit the technical features described in this document to specific embodiments, and should be understood to include various modifications, equivalents, or substitutions of said embodiments.

[0026] In relation to the description of the drawings, similar reference numerals may be used for similar or related components.

[0027] The singular form of the noun corresponding to the item may include one or multiple items, unless the relevant context clearly indicates otherwise.

[0028] In this document, each of the phrases such as "A or B", "at least one of A and B", "at least one of A or B", "A, B or C", "at least one of A, B and C", and "at least one of A, B, or C" may include any one of the items listed together in the corresponding phrase, or all possible combinations thereof.

[0029] The term "and / or" includes a combination of multiple related described components or any of the multiple related described components.

[0030] Terms such as "first," "second," or "first" or "second" may be used simply to distinguish a component from another component and do not limit the components in other aspects (e.g., importance or order).

[0031] Where any (e.g., 1st) component is referred to as "coupled" or "connected" to another (e.g., 2nd) component, with or without the terms "functionally" or "communicationly," it means that said any component may be connected to said other component directly (e.g., via a wire), wirelessly, or through a third component.

[0032] Terms such as "include" or "have" are intended to specify the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in this document, and do not preclude the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0033] When it is said that a component is "connected," "combined," "supported," or "in contact" with another component, this includes not only cases where the components are directly connected, combined, supported, or in contact, but also cases where they are indirectly connected, combined, supported, or in contact through a third component.

[0034] When it is said that a component is located "on" another component, this includes not only cases where one component is in contact with the other, but also cases where another component exists between the two components.

[0035] The terms "part," "module," and "component" may be implemented in hardware or software. Depending on the embodiments, a plurality of "parts," "modules," and "components" may be implemented as a single component, or a single "part," "module," or "component" may include a plurality of components.

[0036] Terms such as "~part," "~unit," "~block," "~part," and "~module" may refer to a unit that processes at least one function or operation. For example, the above terms may refer to at least one piece of hardware such as an FPGA (field-programmable gate array) or ASIC (application specific integrated circuit), at least one piece of software stored in memory, or at least one process processed by a processor.

[0037] The symbols attached to each step are used to identify each step and do not indicate the order of the steps relative to one another; the steps may be performed differently from the specified order unless a specific order is clearly indicated in the context.

[0038] Meanwhile, terms such as "front-rear direction," "front," "rear," "upper side," and "lower side" used in the following description are defined based on the drawings, and the shape and position of each component are not limited by these terms. For example, "upper / lower direction" refers to the Z direction based on the drawings, and "upper" and "lower" may refer to the upward (+Z direction) and downward (-Z direction) directions in the Z direction, respectively, based on the drawings. "Front-rear direction" refers to the X direction based on the drawings, and "front" and "rear" may refer to the front (+X direction) and rear (-X direction), respectively, in the X direction based on the drawings.

[0039] The refrigeration cycle of an air conditioner consists of a compressor, a condenser, an expansion valve, and an evaporator. The refrigeration cycle circulates a series of processes consisting of compression, condensation, expansion, and evaporation, and can supply conditioned air that has exchanged heat with the refrigerant.

[0040] The compressor compresses the refrigerant gas to a high-temperature, high-pressure state and discharges it, and the discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid state and releases heat into the surroundings through the condensation process.

[0041] The expansion valve expands the high-temperature, high-pressure liquid refrigerant condensed in the condenser into low-pressure liquid refrigerant. The evaporator evaporates the refrigerant expanded by the expansion valve and returns the low-temperature, low-pressure refrigerant gas to the compressor. The evaporator achieves a refrigeration effect by utilizing the latent heat of vaporization of the refrigerant to exchange heat with the object being cooled. Through this cycle, the air conditioner can regulate the temperature of the indoor space.

[0042] The outdoor unit of an air conditioner refers to the part of the cooling cycle consisting of a compressor and an outdoor heat exchanger. The indoor unit of an air conditioner includes an indoor heat exchanger, and the expansion valve may be located in either the indoor or outdoor unit. The indoor and outdoor heat exchangers function as a condenser or an evaporator. When the indoor heat exchanger is used as a condenser, the air conditioner becomes a heater, and when it is used as an evaporator, it becomes a cooler.

[0043] Hereinafter, embodiments according to the present disclosure will be described in detail with reference to the attached drawings.

[0044] FIG. 1 is a drawing illustrating an air conditioner according to one embodiment of the present disclosure. FIG. 2 is a drawing illustrating a motor according to one embodiment of the present disclosure. FIG. 3 is a disassembled drawing illustrating a motor according to one embodiment of the present disclosure.

[0045] Referring to FIGS. 1 to 3, an air conditioner (1) according to one embodiment of the present disclosure may include an external housing (2) forming an exterior, a fan (10), and a motor (100) that transmits driving force to the fan (10).

[0046] The air conditioner (1) may include an indoor unit (not shown) placed in an indoor space and an outdoor unit (1a) placed in an outdoor space. Although only the outdoor unit (1a) of the air conditioner (1) is shown in FIG. 1, it is not limited thereto and may also be an indoor unit. In the present invention, the outdoor unit (1a) is used as an example for explanation.

[0047] The air conditioner (1) can absorb heat from inside the air conditioner space and release heat from outside the air conditioner space for cooling the air conditioner space to be air conditioned. Additionally, the air conditioner (1) can absorb heat from outside the air conditioner space and release heat into the air conditioner space for heating the air conditioner space.

[0048] The outdoor unit (1a) may include an outdoor air and heat exchanger (not shown), a compressor (not shown) that compresses the refrigerant, and a fan (10) that sucks in and blows outdoor air so that the outdoor air passes through the outdoor heat exchanger.

[0049] As the fan (10) rotates, external air can be drawn into the interior of the outer housing (2) and, after heat exchange with the outdoor heat exchanger, can be discharged to the outside of the outer housing (2).

[0050] The outdoor unit (1a) may include a motor (100) that generates rotational force for the fan (10) to rotate. The motor (100) and the fan (10) may be combined. The motor (100) and the fan (10) may be connected. The motor (100) may be combined with the fan (10) to transmit the driving force of the motor (100) to the fan (10).

[0051] The motor (100) may include a motor body (200) and a connector (130). The motor (100) may include a wire (131) connecting the motor body (200) and the connector (130). The motor (100) may include a cable holder (132) that supports and guides the wire (131).

[0052] The motor body (200) may include a stator (220), a rotor (300) rotatably disposed inside it, and a rotor shaft (250). The rotor shaft (250) may be disposed to penetrate the rotor (300) by a press-fitting process.

[0053] The motor (100) may include a motor housing (110) that accommodates a motor body (200). The motor housing (110) may accommodate a portion of the motor body (200). The motor housing (110) may accommodate a stator (220) and a rotor (300). The motor housing (110) may accommodate a portion of a rotor shaft (250).

[0054] The motor (100) may include a motor cover (120) that covers the motor body (200). The motor cover (120) may accommodate a portion of the motor body (200). A rotor shaft (250) may be provided to pass through the motor cover (120). The motor cover (120) may cover the stator (220) and the rotor (300).

[0055] The motor cover (120) can be combined with the motor housing (110). The motor housing (110) and the motor cover (120) can form the exterior of the motor (100).

[0056] FIG. 4 is a drawing illustrating a motor body according to one embodiment of the present disclosure. FIG. 5 is a cross-sectional view of a part of a motor body according to one embodiment of the present disclosure.

[0057] Referring to FIGS. 4 and 5, a motor (100) according to one embodiment of the present disclosure may include a stator (220), a rotor (300), and a rotor shaft (250). A motor body (200) may include a stator (220), a rotor (300), and a rotor shaft (250). The rotor (300) may be arranged to rotate inside the stator (220). The rotor (300) may rotate by electromagnetically interacting with the stator (220).

[0058] The stator (220) may include a stator coil (221) and a stator body (223). When current is applied to the stator coil (221), magnetic flux may be generated in the stator (220).

[0059] The stator body (223) may have an annular rim shape extending along the circumferential direction. The circumferential direction refers to the direction around a circle centered on the rotor axis (250). The stator (220) may include a plurality of stator cores (not shown). The plurality of stator cores may be arranged in the circumferential direction. For example, the stator body (223) and the stator cores may be formed integrally.

[0060] A stator coil (221) may be wound on a stator core. The stator coil (221) may be placed inside a stator body (223). Multiple stator coils (221) may be provided.

[0061] The rotor (300) may include a rotor core (310), a bridge (360), and a magnet (350, see FIG. 6). As will be described later, the rotor core (310) may be provided in multiple numbers. The multiple rotor cores (310) may be arranged in a circumferential direction.

[0062] The bridge (360) may be placed inside the rotor core (310). The interior of the rotor core (310) may refer to the space in the inner diameter direction of the rotor core (310). The rotor core (310) and the bridge (360) may be formed integrally.

[0063] The rotor (300) may include a rotor housing (380) formed by insert injection to fill the space between the rotor core (310), bridge (360), magnet (350), and rotor shaft (250).

[0064] The rotor core (310), bridge (360), magnet (350) and rotor shaft (250) can receive centrifugal force as the rotor (300) rotates.

[0065] The rotor housing (380) can connect the rotor core (310) and the rotor shaft (250). The rotor housing (380) can be provided to prevent the arrangement of the rotor core (310), bridge (360), magnet (350), and rotor shaft (250) from being altered by the centrifugal force of the rotor (300). The rotor housing (380) can be provided to prevent the rotor core (310) from being deformed by the centrifugal force of the rotor (300).

[0066] The rotor core (310) may include holes (320) extending in the vertical direction. A rotor housing (380) may be filled between the holes (320). As will be described later, the rotor core (310) may be formed by stacking plate-shaped electrical steel sheets along the longitudinal direction of the rotor shaft (250). The rotor housing (380) filled in the holes (320) of the rotor core (310) can prevent the rotor core (310) from scattering due to centrifugal force.

[0067] FIG. 6 illustrates a part of a rotor according to one embodiment of the present disclosure. FIG. 7 is an exploded view of a rotor according to one embodiment of the present disclosure. FIG. 8 is a cross-sectional view of a part of a rotor according to one embodiment of the present disclosure.

[0068] Referring to FIGS. 6 through 8, a rotor (300) according to one embodiment of the present disclosure may include a rotor core (310). The rotor core (310) may be provided in a plurality. The plurality of rotor cores (310) may be arranged along the circumferential direction.

[0069] The bridge (360) can connect the inner diameters of multiple rotor cores (310). As described above, the rotor core (310) can be formed by laminating plate-shaped electrical steel sheets. The bridge (360) can prevent the steel sheets of the rotor core (310) from scattering when the rotor (300) rotates.

[0070] When magnetic flux is generated in the stator (220), it can interact with the magnet (350) to create attractive and repulsive forces. Magnetic flux formed by the electromagnetic interaction between the rotor (300) and the stator (220) can leak through the bridge (360). To reduce magnetic flux leakage, the bridge (360) can be formed in a portion of the rotor core (310).

[0071] The rotor shaft (250) can be pressed into the bridge (360) and connected to the rotor core (310). If the thickness (t) of the bridge (360) is thin, the bridge (360) may be damaged and / or deformed as the rotor shaft (250) is pressed in.

[0072] A bridge (360) according to one embodiment of the present disclosure may be formed integrally. The bridge (360) may not be separated. The bridge (360) may be formed integrally so that breakage and / or deformation may be prevented when the rotor shaft (250) is pressed in.

[0073] The bridge (360) may be formed in the middle layer of the rotor core (310). The top (360a) of the bridge (360) may be spaced vertically apart from the top (310a) of the rotor core (310). The vertical direction may be the direction in which the rotor axis is extended. The top (360a) of the bridge (360) may be positioned lower than the top (310a) of the rotor core (310).

[0074] The lower end (360b) of the bridge (360) may be spaced apart in the vertical direction from the lower end (310b) of the rotor core (310). The lower end (360b) of the bridge (360) may be positioned higher than the lower end (310b) of the rotor core (310).

[0075] The rotor core (310) may include a hole (320) extending in the vertical direction. Referring to FIG. 5, a rotor housing (380) according to one embodiment of the present disclosure can prevent the rotor core (310) from scattering by filling the hole (320).

[0076] The diameters of the upper (321), middle (322), and lower (323) portions of the hole (320) may not all be the same. The diameter of the upper (321) portion of the hole (320) may be larger than the diameter of the middle (322) portion of the hole (320). The diameter of the lower (323) portion of the hole (320) may be larger than the diameter of the middle (322) portion of the hole (320).

[0077] The larger the diameter of the hole (320), the more magnetic flux can be leaked due to the electromagnetic interaction between the rotor (300) and the stator (220). The rotor (300) according to the concept of the present disclosure can reduce magnetic flux leakage by reducing the diameter of the middle portion (322) of the hole (320).

[0078] The upper part (322a) of the middle part (322) of the hole (320) may be spaced apart in the vertical direction from the upper part (360a) of the bridge (360). The upper part (322a) of the middle part (322) of the hole (320) may be positioned lower than the upper part (360a) of the bridge (360).

[0079] The lower end (322b) of the middle part (322) of the hole (320) may be spaced apart in the vertical direction from the lower end (360b) of the bridge (360). The lower end (322b) of the middle part (322) of the hole (320) may be positioned higher than the lower end (360b) of the bridge (360).

[0080] The surface of the magnet (350) exposed to the outside can be referred to as the outer end surface (351) of the magnet (350). The rotor core (310) may include a support rib (330) that surrounds the outer end surface (351) of the magnet (350) to prevent scattering of the magnet (350). Due to the support rib (330), a portion of the outer end surface (351) of the magnet (350) may not be exposed to the outside.

[0081] In a plurality of rotor cores (310), magnetic flux formed by the electromagnetic interaction between the rotor (300) and the stator (220) can be leaked through the support rib (330a) of one rotor core (310a) and the support rib (330b) of an adjacent rotor core (310b).

[0082] The surface where the magnet (350) contacts between the multiple rotor cores (310) can be called the side surface (352) of the magnet (350). The surface of the rotor core (310) that contacts the side surface (352) of the magnet (350) can be called the side surface (312) of the rotor core (310).

[0083] The side (312) of the rotor core (310) may be wider than the side (352) of the magnet (350). The entire side (352) of the magnet (350) may not be exposed to the outside by contacting the side (312) of the rotor core (310).

[0084] A groove (335) may be formed in the rotor core (310). The rotor core (310), formed by stacking plate-shaped electrical steel sheets, has a groove (335) formed therein to prevent scattering caused by the centrifugal force resulting from the rotation of the rotor (300).

[0085] FIG. 9 is a perspective view of a rotor shaft according to one embodiment of the present disclosure. FIG. 10 is a cross-sectional view of a rotor housing according to one embodiment of the present disclosure.

[0086] Referring to FIGS. 9 and FIGS. 10, a rotor (300) according to one embodiment of the present disclosure may include a rotor shaft (250). As previously described, the rotor shaft (250) may be pressed into a bridge (360) and connected to a rotor core (310).

[0087] The rotor shaft (250) may include a rotor coupling portion (251). The rotor coupling portion (251) may be formed in the portion of the rotor shaft (250) that is positioned inside the bridge (360). The rotor coupling portion (251) may be D-cut. The rotor coupling portion (251) may be provided in multiple numbers.

[0088] After the rotor shaft (250) is pressed into the interior of the rotor core (310), the rotor housing (380) can be formed by insert injection. The rotor housing (380) can be provided to fill the space between the rotor core (310) and the rotor shaft (250).

[0089] The rotor housing (380) may include an axial coupling portion (381). The rotor housing (380) may be provided to fill the rotor coupling portion (251). The rotor housing (380) may include an axial coupling portion (381) formed internally to fill the rotor coupling portion (251).

[0090] The shaft coupling portion (381) can be accommodated in the rotor coupling portion (251). The shaft coupling portion (381) can restrict the rotor shaft (250) from moving up and down relative to the rotor core (310).

[0091] FIG. 11 is a perspective view of a rotor according to one embodiment of the present disclosure.

[0092] Referring to FIG. 11, a rotor (300) according to one embodiment of the present disclosure may include a rotor core (410) and a magnet (450).

[0093] The outer end surface (451) of the magnet (450) may be exposed to the outside. The outer end surface (451) of the magnet (450) may be provided so that its front surface is exposed to the outside.

[0094] The end (451a) of the outer end surface (451) of the magnet (450) and the end (411a) of the outer end surface (411) of the rotor core (410) can be positioned at corresponding locations. The end (451a) of the outer end surface (451) of the magnet (450) and the end (411a) of the outer end surface (411) of the rotor core (410) can be positioned to be in contact with each other.

[0095] The outer end surface (451) of the magnet (450) and the outer end surface (411) of the rotor core (410) may have a continuous circumferential surface. However, this is not limited thereto, and the outer end surface (451) of the magnet (450) may be a flat surface rather than a curved surface.

[0096] The upper surface (413) of the rotor core (410) can be provided flat. The upper surface (413) of the rotor core (410) is provided flat so that leakage of magnetic flux formed by the electromagnetic interaction between the rotor (300) and the stator (220) can be prevented.

[0097] The rotor core (410) may include a hole (420) extending in the vertical direction. The diameter of the upper part of the hole (420) may be larger than the diameter of the middle part of the hole (420). The diameter of the lower part of the hole (420) may be larger than the diameter of the middle part of the hole (420).

[0098] The side (412) of the rotor core (410) and the side (452) of the magnet (450) can be connected by a UV-curing bond. The UV-curing bond can strongly connect the rotor core (410) and the magnet (450) to prevent scattering of the rotor core (410). The UV-curing bond can be cured before the insert injection of the rotor housing (380) to prevent UV leakage.

[0099] The rotor shaft (250) and the bridge (360) can be connected by a UV-curing bond. The rotor shaft (250) and the bridge (360) can be strongly connected by the UV-curing bond.

[0100] FIG. 12 is a plan view of a rotor according to one embodiment of the present disclosure. FIG. 13 is a perspective view of a rotor core according to one embodiment of the present disclosure.

[0101] Referring to FIGS. 12 and 13, a rotor (300) according to one embodiment of the present disclosure may include a rotor core (510) and a magnet (550).

[0102] The side (512) of the rotor core (510) and the side (552) of the magnet (550) can be connected by a UV-curing bond. The UV-curing bond can strongly connect the rotor core (510) and the magnet (550) to prevent scattering of the rotor core (510). The UV-curing bond can be cured before the insert injection of the rotor housing (380) to prevent UV leakage.

[0103] The rotor core (510) may be provided in multiple numbers. Each of the multiple rotor cores (510) may be separated. The multiple rotor cores (510)

[0104] However, the bond connecting the side (512) of the rotor core (510) and the side (552) of the magnet (550) is not limited to this and can be any bond that hardens by irradiating light.

[0105] A motor (100) according to one embodiment includes a stator (220), a rotor shaft (250) positioned at the center of the stator (220), and a rotor (300) coupled to the rotor shaft (250) and arranged to rotate about the rotor shaft (250) by electromagnetically interacting with the stator (220). The rotor (300) includes a plurality of rotor cores (310) arranged spaced apart along the circumferential direction of the rotor shaft (250) and stacked in the direction in which the rotor shaft (250) extends, a magnet (350) positioned between the plurality of rotor cores (310), and a bridge (360) formed in a middle portion of the stacked rotor cores (310) to connect the inner diameters of the plurality of rotor cores (310). The upper end (360a) of the bridge (360) is spaced vertically apart from the upper end (310a) of the plurality of rotor cores (310), and the lower end (360b) of the bridge is spaced vertically apart from the lower end (310b) of the plurality of rotor cores (310).

[0106] The plurality of rotor cores (310) may include holes (320) extended in the vertical direction.

[0107] The diameters of the upper (321) and lower (323) portions of the hole (320) may be larger than the diameter of the middle portion (322) of the hole (320).

[0108] The upper part (322a) of the middle part (322) of the hole (320) may be formed below the upper part (360a) of the bridge (360), and the lower part (322b) of the middle part (322) of the hole (320) may be formed above the lower part (360b) of the bridge (360).

[0109] The rotor (300) may further include a rotor housing (380) that is integrally coupled with the plurality of rotor cores (310), the magnet (350), and the bridge (360).

[0110] The rotor housing (380) can be formed by insert injection to fill the hole (320).

[0111] The rotor shaft (250) may include a rotor coupling portion (251) formed by being recessed into the outer surface of the rotor shaft (250) so as to be fixed to the rotor (300).

[0112] The plurality of rotor cores (310) and the magnet (350) can be connected by a UV-curing bond.

[0113] The above UV-curing bond can connect the sides of the plurality of rotor cores (310) and the sides of the magnet (350).

[0114] The entire outer end surface (351) of the magnet (350) can be provided to be exposed to the outside.

[0115] The outer end surface (351) of the magnet (350) may have a continuous circumferential surface with the outer end surface (311) of the plurality of rotor cores (310) adjacent to the magnet (350).

[0116] The upper surface of the rotor core (310) can be made flat to prevent electromagnetic leakage between the rotor (300) and the stator (220).

[0117] The side (352) of the magnet (350) can come into contact with the side (312) of the plurality of rotor cores (310).

[0118] To prevent the side (352) of the magnet (350) from being exposed to the outside, the area of ​​the side (312) of the plurality of rotor cores (310) may be larger than the area of ​​the side (352) of the magnet (350).

[0119] The above bridge (360) and the above rotor shaft (250) can be connected by a UV-curing bond.

[0120] An air conditioner (1) including a motor (100) according to one embodiment comprises a stator (220), a rotor shaft (250) positioned at the center of the stator (220), and a rotor (300) fixedly coupled to the rotor shaft (250) and arranged to rotate about the rotor shaft (250) by electromagnetically interacting with the stator (220). The rotor (300) comprises a plurality of rotor cores (410) arranged spaced apart along the circumferential direction of the rotor shaft (250) and stacked in the direction in which the rotor shaft (250) extends, a magnet (450) connected to the rotor cores (410) by a UV-curing bond between the plurality of rotor cores (410), and a rotor housing (380) integrally combining the plurality of rotor cores (410) and the magnet (450). Each of the plurality of rotor cores (410) is characterized by being separated.

[0121] The entire outer end surface (451) of the magnet (450) is provided to be exposed to the outside, and the outer end surface (451) of the magnet (450) may have a continuous circumferential surface with the outer end surface (411) of the plurality of rotor cores (410) adjacent to the magnet (450).

[0122] The rotor housing (380) can be formed by insert injection to connect the plurality of rotor cores (410) and the rotor shaft (250).

[0123] The above UV-curing bond can connect the inner surface of the plurality of rotor cores (410) and the outer surface of the rotor shaft (250).

[0124] The upper surface of the rotor core (410) can be made flat to prevent electromagnetic leakage between the rotor (300) and the stator (220).

[0125] According to the concept of the present disclosure, a motor having an improved structure can have leakage caused by electromagnetic interaction between the stator and the rotor improved.

[0126] According to the concept of the present disclosure, the thickness of the bridge is sufficient so that the bridge can be prevented from breaking and / or deforming during the press-fitting process of the rotor shaft.

[0127] The effects obtainable from the present disclosure are not limited to those mentioned above, and other unmentioned effects will be clearly understood by those skilled in the art to which the present disclosure belongs.

[0128] Specific embodiments have been illustrated and described above. However, the invention is not limited to the embodiments described above, and those skilled in the art may make various modifications without departing from the essence of the technical concept of the invention as described in the following claims.

Claims

1. Stator; A rotor shaft positioned at the center of the above-mentioned stator; and A rotor coupled to the rotor axis and arranged to rotate about the rotor axis by electromagnetically interacting with the stator; comprising The above rotor is, A plurality of rotor cores arranged spaced apart along the circumferential direction of the rotor axis and stacked in the direction in which the rotor axis extends; A magnet disposed between the plurality of rotor cores above; A bridge formed in a middle portion of the stacked rotor cores to connect the inner diameters of the plurality of rotor cores; comprising A motor in which the upper end of the bridge is spaced vertically apart from the upper end of the plurality of rotor cores, and the lower end of the bridge is spaced vertically apart from the lower end of the plurality of rotor cores.

2. In Paragraph 1, The above plurality of rotor cores is a motor including holes extending in the vertical direction.

3. In Paragraph 2, A motor in which the diameters of the upper and lower parts of the hole are larger than the diameter of the middle part of the hole.

4. In Paragraph 3, A motor in which the upper part of the middle section of the hole is formed below the upper part of the bridge, and the lower part of the middle section of the hole is formed above the lower part of the bridge.

5. In Paragraph 4, The motor further comprises a rotor housing integrally coupled with the plurality of rotor cores, the magnet, and the bridge.

6. In Paragraph 5, The above rotor housing is a motor formed by insert injection to fill the above hole.

7. In Paragraph 6, A motor comprising a rotor shaft including a rotor coupling portion formed by being recessed on the outer surface of the rotor shaft so as to be fixed to the rotor.

8. In Paragraph 1, A motor in which the plurality of rotor cores and the magnets are connected by a UV-curing bond.

9. In Paragraph 8, The above UV-curing bond is a motor that connects the sides of the plurality of rotor cores and the sides of the magnet.

10. In Paragraph 9, A motor configured such that the entire outer end surface of the above-mentioned magnet is exposed to the outside.

11. In Paragraph 10, A motor in which the outer end surface of the magnet is continuous with the outer end surface of the plurality of rotor cores adjacent to the magnet.

12. In Paragraph 8, A motor in which the upper surface of the rotor core is provided flat to prevent electromagnetic leakage between the rotor and the stator.

13. In Paragraph 1, The side of the magnet above is a motor that contacts the side of the plurality of rotor cores.

14. In Paragraph 13, A motor in which the side area of ​​the plurality of rotor cores is wider than the side area of ​​the magnet to prevent the side of the magnet from being exposed to the outside.

15. In Paragraph 1, A motor in which the above bridge and the above rotor shaft are connected by a UV-curing bond.

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