An air conditioner indoor unit

Abstract

The application relates to the technical field of household appliances, and discloses an indoor air conditioner, which comprises a cross-flow fan and a driving motor. The cross-flow fan comprises an impeller, a fan end cover, heat dissipation blades and a fan shaft. The heat dissipation blades are arranged at one end of the fan end cover away from the impeller. The driving motor comprises an outer rotor, an inner stator, bearings, a motor shell and a damping piece. The inner stator is provided with heat dissipation holes which penetrate through both axial ends of the inner stator and are arranged in a radial direction and spaced apart from the shaft holes. The motor shell is arranged on the inner stator and the outer rotor. The motor shell is provided with through holes which are connected between the inside and outside of the motor shell. The damping piece is arranged between the motor shell and the inner stator. The damping piece is provided with ventilation gaps which are connected between the heat dissipation holes and the through holes. When the cross-flow fan rotates, the heat dissipation blades can be driven to rotate, so that the heat dissipation airflow is sequentially sent out of the motor shell after passing through the heat dissipation holes, the ventilation gaps and the through holes, so that the heat dissipation airflow can quickly take away the heat in the motor shell, and the heat dissipation of the inner stator and the bearings is realized.

Description

Technical Field

[0001] This application relates to the field of household appliance technology, and more particularly to an indoor unit for an air conditioner. Background Technology

[0002] The field of home appliance technology encompasses a wide range of product categories, including but not limited to refrigerators, washing machines, air conditioners, microwave ovens, dishwashers, and vacuum cleaners. The technological development trends for these products primarily focus on intelligentization, energy conservation and environmental protection, optimized user experience, and the application of new materials. Optimized user experience is achieved through design innovation and functional enhancement to meet consumers' demands for health, convenience, and personalization.

[0003] The indoor unit of the air conditioner has a cross-flow fan installed inside the casing. The cross-flow fan draws indoor air into the casing through the air inlet and out through the air outlet. The drive motor is connected to the heat exchange fan to drive its rotation. When the drive motor is set to an external rotor motor, the lever arm is shorter, which can improve torque and efficiency.

[0004] The fan shaft of a cross-flow fan is rotatably connected to a shaft hole via bearings. Due to the compact structure of the motor and limited heat dissipation conditions, the frictional heat generated by the bearings during high-speed operation is difficult to dissipate quickly, resulting in high temperatures. This not only limits further increases in motor power but also accelerates bearing wear and aging, significantly shortening its service life and affecting the long-term stable operation of the air conditioner's indoor unit. Utility Model Content

[0005] This application discloses an indoor air conditioning unit that can quickly remove heat from the motor housing, thereby achieving heat dissipation for the inner stator and bearings.

[0006] To achieve the above objectives, this application discloses an indoor air conditioner unit, comprising: a housing, wherein a housing receiving cavity is formed within the housing, and the housing receiving cavity is provided with:

[0007] Cross-flow fan, the cross-flow fan comprising:

[0008] The impeller extends along the axial direction of the cross-flow fan.

[0009] A fan end cover is disposed at one axial end of the impeller;

[0010] Heat dissipation blades are disposed at the end of the fan end cover opposite to the impeller;

[0011] The fan shaft is located on the fan end cover;

[0012] A drive motor, used to drive the cross-flow fan to rotate, the drive motor comprising:

[0013] The outer rotor is connected to the fan end cover;

[0014] An inner stator is disposed inside the outer rotor. The inner stator has a shaft hole and a heat dissipation hole. The heat dissipation hole passes through both axial ends of the inner stator and is radially spaced from the shaft hole.

[0015] A bearing is disposed in the shaft hole, and the fan shaft passes through the bearing along the axial direction of the cross-flow fan;

[0016] The motor housing covers the inner stator and the outer rotor, and the motor housing has a through hole connecting the inside and outside of the motor housing;

[0017] A shock absorber is disposed between the motor housing and the inner stator, and is arranged around the outer periphery of the inner stator. The shock absorber has a ventilation notch that connects the heat dissipation hole and the through hole.

[0018] When the cross-flow fan rotates, it can drive the multiple heat dissipation blades to rotate, so that the heat dissipation airflow passes through the heat dissipation hole, the ventilation notch, and the through hole in sequence and is then sent out of the motor housing.

[0019] Thus, as the outer rotor of the drive motor rotates, driving the cross-flow fan to rotate, the cooling blades rotate, causing the cooling airflow to move from the heat dissipation holes to the ventilation gaps, and then from the through holes to the outside of the motor housing. This allows the cooling airflow to move quickly from inside the motor housing to the outside, carrying away the heat inside the motor housing and dissipating heat from the inner stator and bearings. Moreover, compared to the cooling airflow circulating inside the motor housing, the cooling airflow proposed in this embodiment can move from the heat dissipation holes, ventilation gaps, and through holes to the outside of the motor housing, carrying the heat inside the motor housing to the outside, resulting in better heat dissipation. This helps to further increase the motor power and improve the service life of the bearings, which is beneficial to the long-term stable operation of the air conditioner indoor unit.

[0020] As an optional implementation, the inner stator further includes:

[0021] Multiple protrusions are arranged around the inner stator between the inner stator and the motor housing, the shock absorber is filled between each of the protrusions and the motor housing, and the ventilation gap is located between two adjacent protrusions.

[0022] Thus, placing the ventilation opening between two adjacent protrusions cleverly utilizes the gap formed by the protrusions, allowing airflow to pass smoothly and enabling the cooling airflow to move smoothly from the heat dissipation hole to the through hole. At the same time, the ventilation opening's location between two adjacent protrusions does not affect the positioning function of the protrusions, and the damping component can make close contact with both the protrusion and the motor housing, ensuring the damping effect of the damping component and preventing vibration from being directly transmitted to the housing through rigid contact, thereby reducing noise generated by resonance in the housing.

[0023] As an optional implementation, the inner stator further includes:

[0024] The cable outlet is located between two adjacent protrusions and corresponds to the through hole. The cable outlet is used to connect a wire harness, and the through hole is configured to allow the wire harness to pass through the motor housing.

[0025] In this way, the through hole can not only provide a wire outlet channel for the wiring harness, but also a gas outlet channel for heat dissipation airflow, realizing "one hole for two purposes" and cleverly utilizing the existing structure of the motor housing to achieve heat dissipation for the stator and bearings.

[0026] As an optional implementation, the drive motor further includes:

[0027] A motor end cover is disposed at the end of the motor housing away from the cross-flow fan. An air outlet gap is formed between the motor end cover and the inner stator. The heat dissipation hole is connected to the ventilation opening through the air outlet gap.

[0028] In this way, the cooling airflow can more smoothly enter the ventilation gap after exiting the heat dissipation holes, allowing the cooling airflow to exit from the through holes into the external space of the motor housing. The motor port can press the shock absorber circumferentially against the drive motor, reducing the vibration transmitted from the inner stator to the motor end cover and further improving the shock absorption effect of the shock absorber.

[0029] As an optional implementation, the fan end cover has a limiting rib on the side facing the drive motor. The limiting rib is annular, and the center of the limiting rib is located on the axis of the fan shaft. The inner stator is disposed inside the limiting rib. The limiting rib is configured to restrict the position of the drive motor relative to the cross-flow fan. The heat dissipation blades are disposed between the fan shaft and the limiting rib.

[0030] Thus, the annular structure of the limiting rib effectively defines a clear radial boundary for the heat dissipation fins. This installation area allows the distribution of the heat dissipation fins to be more concentrated in the core area close to the fan shaft. The limiting rib also provides some protection for the heat dissipation fins, preventing them from colliding with the axial inner stator and deforming, which would affect airflow. Furthermore, the annular limiting rib protrudes from the fan end cover surface, and its own structure provides support and reinforcement to the fan end cover, improving its resistance to deformation during high-speed rotation and reducing structural damage caused by vibration.

[0031] As an optional implementation, the surface of the motor end cover facing the inner stator is formed with:

[0032] An annular protrusion is coaxially arranged with the shaft hole, and multiple heat dissipation blades are arranged radially spaced from the annular protrusion to form a wind cavity. The wind cavity communicates with the heat dissipation hole and is opposite to it along the axial direction of the drive motor.

[0033] Thus, when the cooling fins rotate with the cross-flow fan, the air chamber and the heat dissipation holes are aligned axially with the drive motor, creating a shorter airflow channel between them. The airflow generated by the rotation of the cooling fins converges within the air chamber and flows directly axially towards the heat dissipation holes. This reduces path loss and turbulence interference during airflow transmission. This axially aligned structure allows for smoother airflow into and out of the heat dissipation holes, ensuring that airflow energy is concentrated on the heat-generating components (bearings) and improving heat exchange efficiency.

[0034] As an optional implementation, a first air inlet gap is formed between the heat dissipation blade and the limiting rib.

[0035] Thus, the first air intake gap between the heat dissipation blade and the limiting rib is in the radial direction of the drive motor. There is a certain space between the heat dissipation blade and the limiting rib, which allows the heat dissipation blade to take in air from its radial direction. The first air intake gap is conducive to the airflow entering the air cavity from the radial direction of the heat dissipation blade, making it easier for the heat dissipation blade to draw in air, which is conducive to increasing the air volume of the heat dissipation blade, thereby increasing the air volume of the cooling airflow and improving the heat dissipation efficiency of the drive motor.

[0036] As an optional implementation, a second air inlet gap is formed between the limiting rib and the inner stator, and the second air inlet gap is connected to the first air inlet gap;

[0037] The first air inlet gap and the second air inlet gap are opposite each other along the axial direction of the drive motor, and the inner diameter of the first air inlet gap is smaller than the inner diameter of the second air inlet gap.

[0038] Thus, the width w1 of the first air inlet gap is greater than the width w2 of the second air inlet gap. The fact that w1 is greater than w2 makes it easier for the airflow in the second air inlet gap to diffuse after entering the first air inlet gap. This allows the airflow to enter the heat dissipation fins more smoothly from the radial direction of the drive motor, which helps to increase the airflow of the heat dissipation fins and improve the heat dissipation effect on the drive motor.

[0039] As an optional implementation, a third air inlet gap is formed between the inner stator and the outer rotor, and a fourth air inlet gap is formed between the motor housing and the fan end cover. The second air inlet gap communicates with the fourth air inlet gap through the third air inlet gap, and the fourth air inlet gap communicates with the housing cavity.

[0040] When the cross-flow fan rotates, it can drive the multiple heat dissipation blades to rotate, so that the air in the housing cavity passes through the fourth air inlet gap, the third air inlet gap, the second air inlet gap and the first air inlet gap in sequence before entering the air cavity.

[0041] Thus, the fourth, third, second, and first air inlet gaps are sequentially connected, with the fourth air inlet gap directly connected to the housing cavity. During the rotation of the cooling blades, air is drawn in from the external space of the drive motor (i.e., the housing cavity) to introduce fresh air into the interior of the motor housing for cooling. Multiple cooling blades can form an axial flow fan. The fourth, third, second, and first air inlet gaps are sequentially connected, with the fourth air inlet gap directly connected to the housing cavity. When the drive motor drives the cross-flow fan to rotate, the outer rotor rotates relative to the inner stator, simultaneously rotating the fan end cover. The cooling blades rotate with the fan end cover. During the rotation of the cooling blades, air is drawn in radially from the drive motor, allowing air in the housing cavity to sequentially pass through the fourth, third, second, and first air inlet gaps, ensuring smooth airflow from the external space of the motor housing into the internal space and into the air cavity, providing fresh air for cooling the drive motor. After air enters the air chamber, the rotation of the cooling blades generates a cooling airflow that travels axially away from the cooling blades along the drive motor. This cooling airflow enters the cooling holes, contacts the stator and bearings, then enters the outlet gap, and subsequently passes through ventilation gaps and through holes, moving from the internal space of the motor housing to the external space, carrying away heat from the stator and bearings. This cooling method circulates air inside and outside the motor housing, quickly removing internal heat and effectively controlling the operating temperature of the stator and bearings. This prevents problems such as material performance degradation (e.g., reduced bearing steel hardness) and accelerated grease aging caused by high temperatures, ensuring long-term stable operation of the drive motor, reducing the probability of air conditioner maintenance due to motor failure, and improving the overall reliability and durability of the equipment.

[0042] As an optional implementation, each of the heat dissipation blades is a forward-inclined blade.

[0043] Thus, when the cooling blades are forward-curved, the tangential component of the relative velocity in the velocity triangle at the blade outlet is in the same direction as the impeller rotation. The blades are in a biting state, and the air intake depth is greater. This prolongs the effective acceleration process of the airflow in the cooling blades, thereby increasing the head and air volume of the cooling blades to a certain extent, which is beneficial to improving the heat dissipation efficiency of the inner stator and bearings.

[0044] Compared with the prior art, the beneficial effects of this application are:

[0045] The air conditioner indoor unit provided in this application embodiment has heat dissipation blades added to the fan end cover of the cross-flow fan. The rotational power of the cross-flow fan driven by the drive motor directly drives the heat dissipation blades to rotate. At the same time, through-holes are provided in the inner stator, ventilation gaps are provided in the shock-absorbing components, and through holes are provided in the motor housing. The heat dissipation holes are connected to the ventilation gaps, and the ventilation gaps are connected to the through holes in the motor housing. Driven by the heat dissipation blades, heat dissipation airflow is generated in the heat dissipation holes. Heat dissipation of the bearing can be achieved without the need for an additional motor and fan. Moreover, the heat dissipation airflow can move to the external space of the motor housing in sequence through the heat dissipation holes, ventilation gaps, and through holes. The heat dissipation airflow can carry the heat from the internal space of the motor housing to the external space of the motor housing, continuously carrying away heat from the stator and bearings. This can effectively control the operating temperature of the stator and bearings, avoiding problems such as material performance degradation (e.g., reduced bearing steel hardness) and accelerated grease aging caused by high temperatures. This ensures long-term stable operation of the drive motor, reduces the probability of air conditioner maintenance due to motor failure, and improves the overall reliability and durability of the equipment. Attached Figure Description

[0046] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0047] Figure 1 This is a schematic diagram of the air conditioner indoor unit from a first-view perspective, as disclosed in an embodiment of this application.

[0048] Figure 2 This is a schematic diagram of the air conditioner indoor unit disclosed in the embodiments of this application from a second perspective;

[0049] Figure 3 This is a schematic diagram of the air conditioner indoor unit disclosed in the embodiments of this application, omitting the casing and part of the internal structure;

[0050] Figure 4 The embodiments disclosed in this application Figure 3 Enlarged structural diagram at point A;

[0051] Figure 5 The embodiments disclosed in this application Figure 4 Enlarged structural diagram at point B;

[0052] Figure 6 This is a structural schematic diagram of an air conditioner indoor unit, omitting the casing and some internal structures, from another angle as disclosed in the embodiments of this application.

[0053] Figure 7 The embodiments disclosed in this application Figure 6 Enlarged structural diagram at point C;

[0054] Figure 8 This is a schematic cross-sectional view of a portion of the indoor unit of an air conditioner disclosed in an embodiment of this application;

[0055] Figure 9 This is a schematic diagram of the inner stator structure disclosed in the embodiments of this application;

[0056] Figure 10 This is a schematic diagram of the structure of the fan end cover disclosed in an embodiment of this application;

[0057] Figure 11 This is an exploded view of the drive motor disclosed in an embodiment of this application;

[0058] Figure 12 This is a schematic diagram of the air inlet path of the air cavity disclosed in the embodiments of this application;

[0059] Figure 13 This is a schematic diagram of the air outlet route of the air cavity disclosed in the embodiments of this application.

[0060] Explanation of reference numerals in the attached figures:

[0061] 100-Indoor unit of air conditioner; 1-Casing; 2-Heat exchanger; 3-Cross-flow fan; 31-Impeller; 32-Fan end cover; 321-Limiting rib; 33-Heat dissipation blade; 331-Air cavity; 34-Fan shaft; 4-Drive motor; 41-Outer rotor; 42-Inner stator; 421-Shaft hole; 422-Heat dissipation hole; 423-Protrusion; 424-Cable outlet; 43-Motor housing; 431-Through hole; 44-Shock absorber; 441-Ventilation notch; 45-Bearing; 46-Air outlet gap; 47-First air inlet gap; 48-Second air inlet gap; 49-Third air inlet gap; 410-Fourth air inlet gap; 420-Motor end cover; 4201-Annular protrusion. Detailed Implementation

[0062] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0063] In this application, the terms "upper," "lower," "front," "top," "bottom," "inner," "outer," "vertical," and "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0064] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0065] Furthermore, the terms "set up," "equipped with," and "connected" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0066] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0067] The field of home appliance technology encompasses a wide range of product categories, including but not limited to refrigerators, washing machines, air conditioners, microwave ovens, dishwashers, and vacuum cleaners. The technological development trends for these products primarily focus on intelligentization, energy conservation and environmental protection, optimized user experience, and the application of new materials. Optimized user experience is achieved through design innovation and functional enhancement to meet consumers' demands for health, convenience, and personalization.

[0068] The indoor unit of the air conditioner has a cross-flow fan installed inside the casing. The cross-flow fan draws indoor air into the casing through the air inlet and out through the air outlet. The drive motor is connected to the heat exchange fan to drive its rotation. When the drive motor is set to an external rotor motor, the lever arm is shorter, which can improve torque and efficiency.

[0069] The fan shaft of a cross-flow fan is rotatably connected to a shaft hole via bearings. Due to the compact structure of the motor and limited heat dissipation conditions, the frictional heat generated by the bearings during high-speed operation is difficult to dissipate quickly, resulting in high temperatures. This not only limits further increases in motor power but also accelerates bearing wear and aging, significantly shortening its service life and affecting the long-term stable operation of the air conditioner's indoor unit.

[0070] Based on this, this application discloses an indoor air conditioner unit in which the cross-flow fan, when rotating, drives the cooling airflow through the heat dissipation holes, ventilation gaps, and through holes in sequence before being sent out of the motor housing, so that the cooling airflow can quickly remove the heat inside the motor housing, thereby achieving heat dissipation for the inner stator and bearings.

[0071] The technical solution of this application will be further described below with reference to the embodiments and accompanying drawings.

[0072] Please see Figure 1 , Figure 2 , Figure 6 , Figure 7 and Figure 8 , Figure 1 This is a schematic diagram of the air conditioner indoor unit 100 disclosed in the embodiments of this application from a first-view perspective. Figure 2 This is a schematic diagram of the air conditioner indoor unit 100 disclosed in the embodiments of this application from a second perspective. Figure 6 This is a structural diagram of the air conditioner indoor unit 100 from another angle, omitting the casing 1 and part of the internal structure, as disclosed in the embodiments of this application. Figure 7 The embodiments disclosed in this application Figure 6 A magnified structural diagram at point C. Figure 8 This is a cross-sectional structural diagram of a portion of the indoor air conditioning unit 100 disclosed in an embodiment of this application.

[0073] The indoor unit 100 of the air conditioner includes a casing 1, which is provided with a casing air inlet and a casing air outlet, and a casing receiving cavity is formed inside the casing 1.

[0074] In some embodiments, a heat exchanger 2 is provided inside the housing cavity. The heat exchanger 2 is used to exchange heat with the airflow flowing through the air inlet of the housing. When the air conditioner is cooling, the low-temperature refrigerant flowing inside the heat exchanger 2 absorbs heat from the airflow, thus cooling the air. When heating, the high-temperature refrigerant releases heat to the airflow, thus warming the air. The heat exchanger 2 typically adopts a finned structure to increase the contact area with the airflow, improve heat exchange efficiency, and ensure that the air entering the room reaches the set temperature.

[0075] In some embodiments, a cross-flow fan 3 is provided inside the housing cavity. The cross-flow fan 3 is used to introduce airflow into the housing 1 through the housing air inlet, and after heat exchange in the heat exchanger 2, it is delivered to the room through the housing air outlet. During operation, the cross-flow fan 3 generates negative pressure by rotating, drawing indoor air in from the housing air inlet. After heat exchange in the heat exchanger 2, the processed air is then delivered into the room through the housing air outlet by the thrust of the fan, completing the circulation and renewal of indoor air. The cross-flow fan 3 includes a fan end cover 32 and a fan shaft 34, which are disposed at one end of the cross-flow fan 3 along its own axial direction. The fan shaft 34 is disposed on the fan end cover 32.

[0076] Combination Figure 11 , Figure 11 This is an exploded view of the drive motor 4 disclosed in an embodiment of this application. In some embodiments, the drive motor 4 is housed within the housing cavity. The drive motor 4 includes an outer rotor 41 and an inner stator 42. The inner stator 42 has a shaft hole 421. The outer rotor 41 is connected to the end of the cross-flow fan 3, and the inner stator 42 is disposed inside the outer rotor 41. The inner stator 42 is the core for generating the rotating magnetic field. The outer rotor 41 rotates with the rotating magnetic field and drives the fan to rotate synchronously. The outer rotor 41 motor can output greater torque to meet the low-speed, high-flow air delivery requirements of the cross-flow fan 3.

[0077] In some embodiments, the air conditioner indoor unit 100 further includes a bearing 45 disposed in a shaft hole 421, and a fan shaft 34 passing through the bearing 45 along the axial direction of the cross-flow fan 3.

[0078] In some embodiments, the inner stator 42 is further provided with heat dissipation holes 422, which penetrate the inner stator 42 along the axial direction of the drive motor 4. The cross-flow fan 3 also includes a plurality of heat dissipation blades 33, which are disposed on the side of the fan end cover 32 facing the drive motor 4 and are arranged at intervals along the circumferential direction of the fan shaft 34. When the cross-flow fan 3 rotates, it can drive the plurality of heat dissipation blades 33 to rotate, so that heat dissipation airflow is formed in the heat dissipation holes 422.

[0079] Bearing 45 is the core moving component of drive motor 4. During the rotation of cross-flow fan 3, there is continuous friction between bearing 45 and fan shaft 34, which generates a large amount of heat. If heat accumulates, it may cause the bearing 45 to overheat, leading to lubrication failure, accelerated wear, or even jamming, directly affecting the lifespan of drive motor 4 and the operational stability of air conditioner. When the heat dissipation fins 33 rotate with cross-flow fan 3, they can form a directional airflow (cooling airflow) within the heat dissipation holes 422. This airflow can directly flow through the area near bearing 45, efficiently carrying away the heat generated by bearing 45.

[0080] A heat dissipation blade 33 is added to the fan end cover 32 of the cross-flow fan 3. The rotational power of the cross-flow fan 3 driven by the drive motor 4 directly drives the heat dissipation blade 33 to rotate. At the same time, through the heat dissipation holes 422 provided on the inner stator 42, heat dissipation airflow is generated in the heat dissipation holes 422 under the action of the heat dissipation blade 33. Heat dissipation of the bearing 45 can be achieved without the need for an additional motor or fan. The heat dissipation airflow continuously removes heat from the bearing 45, which can effectively control the operating temperature of the bearing 45 and avoid problems such as material performance degradation (such as reduced hardness of bearing 45 steel) and accelerated aging of grease caused by high temperature. This ensures the long-term stable operation of the drive motor 4, reduces the probability of air conditioner maintenance due to motor failure, and improves the overall reliability and durability of the equipment.

[0081] The design of the heat dissipation blades 33 and heat dissipation holes 422 does not occupy the space of the indoor unit 100 of the air conditioner. The overall structure is simple, which reduces the manufacturing cost and assembly complexity of the equipment, avoids the increase in energy consumption caused by an additional power source, and achieves good heat dissipation for the bearing 45.

[0082] In some embodiments, the drive motor 4 further includes a motor housing 43 and a shock absorber 44. The motor housing 43 covers the inner stator 42 and the outer rotor 41. The motor housing 43 is provided with a through hole 431 that connects the inside and outside of the motor housing 43. The shock absorber 44 is disposed between the motor housing 43 and the inner stator 42 and is disposed around the outer periphery of the inner stator 42. The shock absorber 44 has a ventilation notch 441 that connects the heat dissipation hole 422 and the through hole 431. When the cross-flow fan 3 rotates, it can drive multiple heat dissipation blades 33 to rotate, so as to drive the heat dissipation airflow to pass through the heat dissipation hole 422, the ventilation notch 441, and the through hole 431 in sequence and then be sent out of the motor housing 43.

[0083] Specifically, as the outer rotor 41 of the drive motor 4 rotates, driving the cross-flow fan 3 to rotate, the heat dissipation blades 33 rotate, causing the cooling airflow to move from the heat dissipation hole 422 to the ventilation gap 441, and then from the through hole 431 (the through hole 431 can be a round hole, a polygonal hole, etc.) to the outside of the motor housing 43. This allows the cooling airflow to move quickly from inside the motor housing 43 to outside, carrying away the heat inside the motor housing 43 and dissipating heat from the inner stator 42 and bearing 45. Moreover, compared to the cooling airflow circulating inside the motor housing 43, the cooling airflow proposed in this embodiment can move from the heat dissipation hole 422, the ventilation gap 441, and the through hole 431 to the outside of the motor housing 43, carrying away the heat inside the motor housing 43 to the outside of the motor housing 43. This results in better heat dissipation, helps to further increase the motor power, and improves the service life of the bearing 45, which is beneficial to the long-term stable operation of the air conditioner indoor unit 100.

[0084] According to the air conditioner indoor unit 100 provided in the embodiments of this application, a heat dissipation blade 33 is added to the fan end cover 32 of the cross-flow fan 3. The rotational power of the cross-flow fan 3 driven by the drive motor 4 directly drives the heat dissipation blade 33 to rotate. Under the drive of the heat dissipation blade 33, a heat dissipation airflow is generated in the heat dissipation hole 422. The bearing 45 can be cooled without the need for an additional motor or fan. Moreover, the heat dissipation airflow can move to the external space of the motor housing 43 through the heat dissipation hole 422, the ventilation notch 441 and the through hole 431 in sequence. The heat dissipation airflow can carry the heat from the internal space of the motor housing 43 to the external space of the motor housing 43, continuously carrying away the heat from the stator and bearing 45. This can effectively control the operating temperature of the stator and bearing 45, avoid problems such as material performance degradation (such as reduced bearing steel hardness) and accelerated grease aging caused by high temperature, thereby ensuring the long-term stable operation of the drive motor 4, reducing the probability of air conditioner maintenance due to motor failure, and improving the overall reliability and durability of the equipment.

[0085] Combination Figure 9 , Figure 9 This is a schematic diagram of the structure of the inner stator 42 disclosed in an embodiment of this application. In some embodiments, the inner stator 42 is further provided with a plurality of protrusions 423, which are arranged around the inner stator 42 and the motor housing 43. The shock absorber 44 is filled between each protrusion 423 and the motor housing 43, and the ventilation gap 441 is located between two adjacent protrusions 423.

[0086] Specifically, the surface of the inner stator 42 that mates with the motor housing 43 can be cylindrical, or multiple protrusions 423 can be provided on the outer periphery of the inner stator 42. The protrusions 423 protrude from the outer peripheral wall of the inner stator 42 towards the radial direction of the drive motor 4. There can be three protrusions 423. The protrusions 423 are fixedly installed inside the motor housing 43 in conjunction with the shock absorber 44. The protrusions 423 can be rectangular, cylindrical, spherical, or other structures. The protrusions 423 can provide positioning for the installation of the inner stator 42. The protrusions 423 abut against the shock absorber 44. The inner stator 42 will generate periodic vibrations due to electromagnetic force, and the motor housing 43 will transmit the vibrations. The shock absorber 44 (usually an elastic material such as rubber or silicone) is located between the inner stator 42 and the housing. It can absorb the vibration energy of the inner stator 42 through its own deformation, preventing the vibration from being directly transmitted to the housing through rigid contact, and reducing the noise generated by the resonance of the housing. The shock absorber 44 is provided with a ventilation notch 441. The ventilation notch 441 can be located at the position corresponding to the protrusion 423 on the shock absorber 44, or it can be located between two adjacent protrusions 423. Placing the ventilation notch 441 between two adjacent protrusions 423 can cleverly utilize the gap formed by the adjacent protrusions 423 to allow airflow to pass smoothly, so that the heat dissipation airflow can move smoothly from the heat dissipation hole 422 to the through hole 431. At the same time, the ventilation notch 441 is located between two adjacent protrusions 423, which will not affect the positioning function of the protrusion 423, and the shock absorber 44 can make close contact with the protrusion 423 and the motor housing 43 respectively, ensuring the shock absorption effect of the shock absorber 44, avoiding the direct transmission of vibration to the housing through rigid contact, and reducing the noise generated by the resonance of the housing.

[0087] Combination Figure 9 In some embodiments, the inner stator 42 is further provided with a wire outlet 424, which is located between two adjacent protrusions 423 and corresponds to the through hole 431. The wire outlet 424 is used to connect the wire harness, and the through hole 431 is configured to allow the wire harness to pass through the motor housing 43.

[0088] Specifically, the cable exit section 424 protrudes radially from the outer peripheral wall of the inner stator 42 toward the drive motor 4. The cable exit section 424 can be a rectangular body. All wires connected to the inner stator 42 are led out through the cable exit section 424, facilitating wire harness arrangement. The wire harness can exit from any position on the motor housing 43 to the outside, or it can exit through the through hole 431. The cable exit section 424 can be located at any position on the outer peripheral wall of the inner stator 42, or it can correspond to the through hole 431. The cable exit section 424 corresponds to the through hole 431, allowing the wire harness to pass smoothly through the through hole 431. The wire harness exits through the through hole 431, so that the through hole 431 can not only provide an air outlet channel for heat dissipation airflow, but also provide a cable exit channel for the wire harness, achieving "one hole for two purposes." This cleverly utilizes the existing structure of the motor housing 43 to achieve heat dissipation for the bearing 45 and the inner stator 42, as well as the arrangement of the wire harness.

[0089] Combination Figure 7 In some embodiments, the drive motor 4 also includes a motor end cover 420, which is disposed at the end of the motor housing 43 away from the cross-flow fan 3. An air outlet gap 46 is formed between the motor end cover 420 and the inner stator 42, and the heat dissipation hole 422 is connected to the ventilation gap 441 through the air outlet gap 46.

[0090] Specifically, the shock absorber 44 can completely fill the gap between the motor end cover 420 and the inner stator 42, and a separate airflow channel can be provided to connect the heat dissipation hole 422 and the ventilation gap 441. Alternatively, an air outlet gap 46 can be reserved between the motor end cover 420 and the inner stator 42. The air outlet gap 46 between the motor end cover 420 and the inner stator 42 allows the cooling airflow to enter the ventilation gap 441 more smoothly after it is discharged from the heat dissipation hole 422. This avoids the problem of the airflow channel not aligning with the heat dissipation hole 422 and blocking the heat dissipation hole 422, or the airflow channel being blocked after the shock absorber 44 is compressed. This allows the cooling airflow to be discharged from the through hole 431 to the external space of the motor housing 43. The motor end cover 420 can press the shock absorber 44 circumferentially from the drive motor 4, meaning that the shock absorber 44 only fills a ring-shaped area around the motor end cover 420 and the inner stator 42, reducing the vibration transmitted from the inner stator 42 to the motor end cover 420, and further improving the shock absorption effect of the shock absorber 44.

[0091] Combination Figure 3 , Figure 4 , Figure 5 and Figure 10 , Figure 3 This is a structural diagram of the air conditioner indoor unit 100 disclosed in this application, omitting the casing 1 and part of the internal structure. Figure 4 The embodiments disclosed in this application Figure 3 Enlarged structural diagram at point A in the middle. Figure 5 The embodiments disclosed in this application Figure 4Enlarged structural diagram at point B. Figure 10 This is a schematic diagram of the structure of the fan end cover 32 disclosed in an embodiment of this application. In some embodiments, the side of the fan end cover 32 facing the drive motor 4 is provided with a limiting rib 321. The limiting rib 321 is annular, and the center of the limiting rib 321 is located on the axis of the fan shaft 34. The inner stator 42 is disposed inside the limiting rib 321. The limiting rib 321 is configured to limit the position of the drive motor 4 relative to the cross-flow fan 3. The heat dissipation blades 33 are disposed between the fan shaft 34 and the limiting rib 321.

[0092] Specifically, the limiting rib 321 radially restricts the position of the inner stator 42 of the drive motor 4. During the assembly of the indoor unit 100 of the air conditioner, the limiting rib 321 serves as a positioning reference to ensure the coaxiality of the drive motor 4 and the cross-flow fan 3, preventing misalignment of their axes due to assembly deviations. When the cross-flow fan 3 rotates at high speed, coaxial positioning reduces the relative wobbling between the drive motor 4 and the fan end cover 32, reduces vibration and noise caused by eccentric rotation, and avoids abnormal friction caused by positional misalignment between components, ensuring long-term stable operation of the equipment. A portion of the heat dissipation blades 33 can be mounted on the limiting rib 321, or between the fan shaft 34 and the limiting rib 321. The annular structure of the limiting rib 321 effectively defines a clear radial boundary for the heat dissipation blades 33. This mounting area concentrates the distribution of the heat dissipation blades 33 closer to the core area of ​​the fan shaft 34. The limiting rib 321 also provides some protection for the heat dissipation blades 33, preventing them from colliding with and deforming the inner stator 42 along its axis, thus affecting airflow. In addition, the annular limiting rib 321 protrudes from the surface of the fan end cover 32, and its own structure can provide a certain degree of support and reinforcement for the fan end cover 32, improving the deformation resistance of the fan end cover 32 during high-speed rotation and reducing structural losses caused by vibration. Optionally, the outer rotor 41 is injection molded on the outer periphery of the limiting rib 321 on the fan end cover 32 to ensure a more stable connection between the outer rotor 41 and the fan.

[0093] Combination Figure 4 In some embodiments, an annular protrusion 4210 is formed on the surface of the motor end cover 420 facing the inner stator 42. The annular protrusion 4210 is coaxially arranged with the shaft hole 421. A plurality of heat dissipation blades 33 are arranged radially spaced from the annular protrusion 4210 along the drive motor 4 to form a wind cavity 331. The wind cavity 331 is connected to the heat dissipation hole 422 and is opposite to it along the axial direction of the drive motor 4.

[0094] Specifically, an annular rubber ring can be provided on the outer periphery of the bearing 45. This ring rubber ring engages with the annular protrusion 4210 to prevent the fan end cover 32 from colliding with the inner stator 42 or the motor housing 43. The annular protrusion 4210 has a heat dissipation hole 422 connected to the air cavity 331. The heat dissipation hole 422 can be inclined relative to the air cavity 331 or positioned opposite to it along the axial direction of the drive motor 4. When the air cavity 331 and the heat dissipation hole 422 are opposite to each other along the axial direction of the drive motor 4, a shorter airflow channel can be formed between the heat dissipation blades 33 and the heat dissipation hole 422, allowing for smoother airflow. The airflow generated by the rotation of the heat dissipation blades 33 converges within the air cavity 331 and can then flow directly axially towards the heat dissipation hole 422. This reduces path loss and turbulence interference during airflow transmission. This axially opposite structure allows the cooling airflow to enter and exit the heat dissipation hole 422 more smoothly, ensuring that the airflow energy is concentrated on the heat-generating component (bearing 45) and improving the efficiency of heat exchange.

[0095] Combination Figure 5 In some embodiments, a first air inlet gap 47 is formed between the heat dissipation blade 33 and the limiting rib 321.

[0096] Specifically, along the radial direction of the drive motor 4, the heat dissipation blade 33 can be fitted with the limiting rib 321, or a first air inlet gap 47 can be formed between the heat dissipation blade 33 and the limiting rib 321. This first air inlet gap 47, located in the radial direction of the drive motor 4, provides a certain space between the heat dissipation blade 33 and the limiting rib 321, allowing air to enter the heat dissipation blade 33 radially. This gap facilitates airflow from the heat dissipation blade 33 into the air cavity 331, making it easier for the heat dissipation blade 33 to draw in air, thus increasing the airflow volume and overall cooling efficiency of the drive motor 4. Furthermore, the first air inlet gap 47 between the limiting rib 321 and the heat dissipation blade 33 also prevents deformation of the fan end cover 32 from affecting the limiting rib 321. The deformation of the limiting rib 321 is not directly transmitted to the heat dissipation blade 33, thus providing some protection for the heat dissipation blade 33.

[0097] Combination Figure 5 In some embodiments, a second air inlet gap 48 is formed between the limiting rib 321 and the inner stator 42, and the second air inlet gap 48 is connected to the first air inlet gap 47.

[0098] The first air inlet gap 47 and the second air inlet gap 48 are opposite each other along the axial direction of the drive motor 4, and along the radial direction of the drive motor 4, the width w1 of the first air inlet gap 47 is greater than the width w2 of the second air inlet gap 48.

[0099] Specifically, the second air inlet gap 48 between the limiting rib 321 and the inner stator 42 serves two purposes: firstly, it prevents the limiting rib 321 from rubbing against the inner stator 42 during the rotation of the fan end cover 32; secondly, it allows air from outside the motor housing 43 to enter the first air inlet gap 47 through the second air inlet gap 48, thereby allowing air to enter the air cavity 331 and helping to increase the blowing volume of the heat dissipation blades 33. Furthermore, in this embodiment, the inner diameter of the first air inlet gap 47 is smaller than the inner diameter of the second air inlet gap 48, meaning the diameter of the heat dissipation blade 33 is smaller than the diameter of the inner stator 42. Since the first air inlet gap 47 can be arranged annularly around the radial outer periphery of the air cavity 331, i.e., located on the radial outer periphery of the heat dissipation blade 33, and the second air inlet gap 48 can be annularly arranged around the outer periphery of the inner stator 42, the outer periphery boundaries of both the first and second air inlet gaps 47 and 48 are formed by the inner wall of the limiting rib 321. The inner periphery boundary of the first air inlet gap 47 is located on the periphery of the heat dissipation blade 33, and the inner periphery boundary of the second air inlet gap 48 is located on the periphery of the inner stator 42. Figure 5 As shown, the width w1 of the first air inlet gap 47 is greater than the width w2 of the second air inlet gap 48. The fact that w1 is greater than w2 makes it easier for the airflow in the second air inlet gap 48 to diffuse after entering the first air inlet gap 47, so that the airflow can enter the heat dissipation blade 33 more smoothly from the radial direction of the drive motor 4, which helps to increase the airflow of the heat dissipation blade 33 and improve the heat dissipation effect on the drive motor 4.

[0100] Combination Figure 5 In some embodiments, a third air inlet gap 49 is formed between the inner stator 42 and the outer rotor 41, and a fourth air inlet gap 410 is formed between the motor housing 43 and the fan end cover 32. The second air inlet gap 48 is connected to the fourth air inlet gap 410 through the third air inlet gap 49, and the fourth air inlet gap 410 is connected to the housing cavity.

[0101] Specifically, the fourth air inlet gap 410, the third air inlet gap 49, the second air inlet gap 48, and the first air inlet gap 47 are connected in sequence. The fourth air inlet gap 410 is directly connected to the housing cavity. During the rotation of the heat dissipation blades 33, air can be drawn from the external space of the drive motor 4 (i.e., the housing cavity) to introduce fresh air into the interior of the motor housing 43, which is beneficial for the heat dissipation of the drive motor 4. Multiple heat dissipation blades 33 can form an axial flow fan. The fourth air inlet gap 410, the third air inlet gap 49, the second air inlet gap 48, and the first air inlet gap 47 are connected in sequence. The fourth air inlet gap 410 is directly connected to the housing cavity. When the drive motor 4 drives the cross-flow fan 3 to rotate, the outer rotor 41 rotates relative to the inner stator 42, simultaneously driving the fan end cover 32 to rotate. The heat dissipation blades 33 rotate together with the fan end cover 32. During the rotation of the heat dissipation blades 33, air can be drawn radially from the drive motor 4, such as... Figure 12As shown, Figure 12 This is a schematic diagram of the air inlet path of the air cavity 331 disclosed in the embodiments of this application. Figure 12 The arrows indicate the direction of airflow, allowing air within the housing cavity to sequentially pass through the fourth air inlet gap 410, the third air inlet gap 49, the second air inlet gap 48, and the first air inlet gap 47. This ensures smooth airflow from the external space of the motor housing 43 into its internal space, and then into the air cavity 331, providing fresh air for cooling the drive motor 4. After the air enters the air cavity 331, as... Figure 13 As shown, Figure 13 This is a schematic diagram of the air outlet route of the air cavity 331 disclosed in the embodiments of this application. Figure 13 The arrows indicate the direction of the cooling airflow. The rotation of the cooling blades 33 generates a cooling airflow that moves away from the cooling blades 33 along the axial direction of the drive motor 4. This airflow enters the cooling holes 422, contacts the inner stator 42 and bearing 45, then enters the air outlet gap 46, and passes through the ventilation notch 441 and through hole 431, moving from the internal space of the motor housing 43 to the external space, carrying away heat from the inner stator 42 and bearing 45. This cooling method circulates the air inside and outside the motor housing 43, quickly removing internal heat and effectively controlling the operating temperature of the inner stator 42 and bearing 45. This prevents material performance degradation (such as reduced bearing steel hardness) and accelerated grease aging caused by high temperatures, ensuring long-term stable operation of the drive motor 4, reducing the probability of air conditioner maintenance due to motor failure, and improving the overall reliability and durability of the equipment.

[0102] In some embodiments, each of the heat dissipation blades 33 is a forward-inclined blade.

[0103] Specifically, the heat dissipation blade 33 can be a forward-curved blade, a backward-curved blade, or a radial blade. The bending direction of the forward-curved blade is the same as the rotation direction of the cross-flow fan 3, the bending direction of the backward-curved blade is opposite to the rotation direction of the cross-flow fan 3, and the radial blade extends along the radial direction of the cross-flow fan 3. When the heat dissipation blade 33 is a forward-curved blade, the tangential component of the relative velocity in the velocity triangle at the blade outlet is consistent with the impeller rotation direction. The blade is in a biting air state, and the air intake depth is greater. This prolongs the effective acceleration process of the airflow within the heat dissipation blade 33, thereby increasing the head and air volume of the heat dissipation blade 33 to a certain extent, which is beneficial to improving the heat dissipation efficiency of the inner stator 42 and bearing 45.

[0104] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An air conditioner indoor unit (100), characterized in that, include: A housing (1) is provided inside the housing (1), and the housing cavity contains: A cross-flow fan (3), the cross-flow fan (3) comprising: Impeller (31) extends along its own axial direction along the cross-flow fan (3); A fan end cover (32) is disposed at one axial end of the impeller (31); Multiple heat dissipation blades (33) are disposed on one end of the fan end cover (32) away from the impeller (31); A fan shaft (34) is disposed on the fan end cover (32); A drive motor (4) is used to drive the cross-flow fan (3) to rotate. The drive motor (4) includes: The outer rotor (41) is connected to the fan end cover (32); An inner stator (42) is disposed inside the outer rotor (41). The inner stator (42) is provided with a shaft hole (421) and a heat dissipation hole (422). The heat dissipation hole (422) passes through both axial ends of the inner stator (42) and is radially spaced from the shaft hole (421). A bearing (45) is disposed in the shaft hole (421), and the fan shaft (34) passes through the bearing (45) along the axial direction of the cross-flow fan (3); The motor housing (43) covers the inner stator (42) and the outer rotor (41), and the motor housing (43) is provided with a through hole (431) connecting the inside and outside of the motor housing (43); A shock absorber (44) is disposed between the motor housing (43) and the inner stator (42) and is disposed around the outer periphery of the inner stator (42). The shock absorber (44) has a ventilation notch (441) that connects the heat dissipation hole (422) and the through hole (431). When the cross-flow fan (3) rotates, it can drive the multiple heat dissipation blades (33) to rotate, so as to drive the heat dissipation airflow to pass through the heat dissipation hole (422), the ventilation notch (441), and the through hole (431) in sequence and then be sent out of the motor housing (43).

2. The air conditioner indoor unit (100) according to claim 1, characterized in that, The inner stator (42) is further provided with: Multiple protrusions (423) are arranged around the inner stator (42) and the motor housing (43), the shock absorber (44) is filled between each of the protrusions (423) and the motor housing (43), and the ventilation notch (441) is located between two adjacent protrusions (423).

3. The indoor unit (100) of the air conditioner according to claim 2, characterized in that, The inner stator (42) is further provided with: The cable outlet (424) is located between two adjacent protrusions (423) and corresponds to the through hole (431). The cable outlet (424) is used to connect the wire harness, and the through hole (431) is configured to allow the wire harness to pass through the motor housing (43).

4. The air conditioner indoor unit (100) according to claim 3, characterized in that, The drive motor (4) also includes: A motor end cover (420) is disposed at one end of the motor housing (43) away from the cross-flow fan (3). An air outlet gap (46) is formed between the motor end cover (420) and the inner stator (42). The heat dissipation hole (422) is connected to the ventilation gap (441) through the air outlet gap (46).

5. The air conditioner indoor unit (100) according to claim 4, characterized in that, The fan end cover (32) facing the drive motor (4) is provided with: A limiting rib (321) is provided, the limiting rib (321) is annular, and the center of the limiting rib (321) is located on the axis of the fan shaft (34). The inner stator (42) is disposed inside the limiting rib (321). The limiting rib (321) is configured to limit the position of the drive motor (4) relative to the cross-flow fan (3). The heat dissipation blade (33) is disposed between the fan shaft (34) and the limiting rib (321).

6. The air conditioner indoor unit (100) according to claim 5, characterized in that, The surface of the motor end cover (420) facing the inner stator (42) has the following features: An annular protrusion (4201) is coaxially arranged with the shaft hole (421). A plurality of heat dissipation blades (33) and the annular protrusion (4201) are arranged radially spaced along the drive motor (4) to form a wind cavity (331). The wind cavity (331) is connected to the heat dissipation hole (422) and is opposite to the drive motor (4) along the axial direction.

7. The air conditioner indoor unit (100) according to claim 6, characterized in that, A first air inlet gap (47) is formed between the heat dissipation blade (33) and the limiting rib (321).

8. The air conditioner indoor unit (100) according to claim 7, characterized in that, A second air inlet gap (48) is formed between the limiting rib (321) and the inner stator (42), and the second air inlet gap (48) is connected to the first air inlet gap (47); The first air inlet gap (47) and the second air inlet gap (48) are opposite each other along the axial direction of the drive motor (4) and along the radial direction of the drive motor (4), the width w1 of the first air inlet gap (47) is greater than the width w2 of the second air inlet gap (48).

9. The air conditioner indoor unit (100) according to claim 8, characterized in that, A third air inlet gap (49) is formed between the inner stator (42) and the outer rotor (41), and a fourth air inlet gap (410) is formed between the motor housing (43) and the fan end cover (32). The second air inlet gap (48) communicates with the fourth air inlet gap (410) through the third air inlet gap (49), and the fourth air inlet gap (410) communicates with the housing cavity. When the cross-flow fan (3) rotates, it can drive the multiple heat dissipation blades (33) to rotate, so that the air in the housing cavity passes through the fourth air inlet gap (410), the third air inlet gap (49), the second air inlet gap (48) and the first air inlet gap (47) in sequence before entering the air cavity (331).

10. The air conditioner indoor unit (100) according to claim 9, characterized in that, Each of the aforementioned heat dissipation blades (33) is a forward-inclined blade.

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