A motor assembly of a compressor, a compressor and an air conditioner

Abstract

The application provides a motor assembly of a compressor, a compressor and an air conditioner. The motor assembly of the compressor comprises a rotor, a secondary rotor baffle and an inner fan blade. The secondary rotor baffle is arranged on an axial end surface of the rotor. An axial one end of the secondary rotor baffle is connected with the rotor, and an axial other end of the secondary rotor baffle is provided with the inner fan blade. The inner fan blade comprises a first mounting part and a first fan blade. The first mounting part is fixedly mounted on an end surface of the axial other end of the secondary rotor baffle. Along a radial direction of the rotor, the first fan blade is connected and arranged on a radial inner side of the first mounting part, and the first fan blade extends towards a center hole of the rotor, so that the overall structure of the inner fan blade does not exceed a radial outer periphery of the secondary rotor baffle. According to the application, the inner fan blade structure of the application can be arranged on an axial one end of the rotor opposite to a closed end of the non-communicating shell, the part of air is effectively utilized, the air flow rate is improved, the suction volume of the pump body structure in the compressor is increased, and the refrigerating capacity of the compressor is improved.

Description

Technical Field

[0001] This invention relates to the field of compressor technology, and more specifically to a compressor motor assembly, a compressor, and an air conditioner. Background Technology

[0002] Aluminum-cased compressors are widely used in electric vehicles, offering advantages such as fewer parts, lighter weight, higher energy efficiency, and lower vibration and noise.

[0003] like Figure 1 As shown, in an aluminum-cased scroll compressor, the area of ​​the front cover and its mating parts includes the following parts: front cover, casing, oil distribution pipe, stationary plate, moving plate, etc. Due to limited space, the suction pressure of the moving and stationary plates is generally equal to the intake pressure of the casing. The flow rate of the internal refrigerant is also limited by the rotation speed and internal structure, so there are limited ways to increase the cooling capacity.

[0004] Patent 201820712848.0 discloses a solution that has a fan panel on the rotor's balance block, with fan blades on both the top and bottom to enhance the airflow around the fan blades and create an air pressure difference at both ends of the crankshaft. However, this fan is an integrated fan, which is difficult to manufacture. The fan blades are relatively straight, so the effect is limited, and it occupies a lot of space on one side.

[0005] Patent 202020019349.0 discloses a scheme in which a fan structure is provided on the balance block of the rotor and driven by the high-speed rotation of the crankshaft, which is conducive to accelerating the concentration of refrigerant. However, the fan is an integrated fan and the blades are curved, which is only suitable for mold casting. The processing is difficult and not conducive to practical verification.

[0006] However, for compressors with non-connected housings, since one end is closed and only one end is open, the motor is installed from the open end of the housing into the closed end. Therefore, the fan can only be set on the rotor or main shaft of the motor facing the open end, resulting in insufficient air intake of the pump body, which prevents the compressor's cooling capacity from being effectively improved.

[0007] Because existing compressors with non-connected housings have technical problems such as low suction volume and insufficient cooling capacity, this invention studies and designs a compressor motor assembly, a compressor, and an air conditioner. Summary of the Invention

[0008] Therefore, the technical problem to be solved by the present invention is to overcome the defects of low suction volume and insufficient cooling capacity of compressors with non-connected housings in the prior art, thereby providing a compressor motor assembly, a compressor, and an air conditioner.

[0009] To address the above problems, the present invention provides a motor assembly for a compressor, comprising:

[0010] The rotor comprises a rotor, a secondary rotor baffle, and an inner fan blade. The secondary rotor baffle is disposed on one axial end face of the rotor. One axial end of the secondary rotor baffle is connected to the rotor, and the other axial end is provided with the inner fan blade. The inner fan blade includes a first mounting part and a first fan blade. The first mounting part is fixedly mounted on the end face of the other axial end of the secondary rotor baffle. Along the radial direction of the rotor, the first fan blade is connected and disposed on the radial inner side of the first mounting part, and the first fan blade extends toward the central hole of the rotor, so that the overall structure of the inner fan blade does not exceed the radial outer periphery of the secondary rotor baffle.

[0011] In some embodiments, the first fan blade includes a first windward surface relatively close to the auxiliary rotor baffle and a first leeward surface relatively far from the auxiliary rotor baffle. The first windward surface is a plane or an arc surface. When the first windward surface is a plane, the plane intersects the axial end face of the auxiliary rotor baffle at an inclination angle ∠A. When the first windward surface is an arc surface, the tangent at any point on the arc surface intersects the axial end face of the auxiliary rotor baffle at an inclination angle ∠A'.

[0012] In some embodiments, when the first windward surface is a plane and the plane intersects the axial end face of the auxiliary rotor baffle at an inclination, with an inclination angle ∠A between them, ∠A∈[0°,45°]; when the first windward surface is an arc surface and the tangent at any point on the arc surface intersects the axial end face of the auxiliary rotor baffle at an inclination, with an inclination angle ∠A' between them, ∠A'∈[0°,45°].

[0013] In some embodiments, the first fan blade further includes a first windward end and a first leeward end. The first windward end connects the first windward surface and the first leeward surface to form a first leading edge of the first fan blade. In a first fan blade, the first leading edge is the first to come into contact with the airflow. The first leeward end connects the first windward surface and the first leeward surface to form a first trailing edge of the first fan blade. In a first fan blade, the first trailing edge is the last to come into contact with the airflow.

[0014] In some embodiments, the inner fan blades have at least two, and the at least two first mounting portions are spaced apart circumferentially along the rotor. The first fan blades of the at least two inner fan blades extend radially inward. Among two adjacent inner fan blades, and in the axial end face projection plane, at least a portion of the first trailing edge of the first fan blade of the inner fan blade located upstream in the airflow direction is covered by the first leading edge of the first fan blade of the inner fan blade located downstream.

[0015] In some embodiments, a secondary balancing block is also included, which is disposed on the secondary rotor baffle and located between two adjacent first mounting portions, wherein the first fan blade does not contact the secondary balancing block.

[0016] In some embodiments, the first mounting part is a column structure with a first mounting hole. The motor assembly also includes a first fastener, which passes through the first mounting hole to integrally mount the first mounting part and the auxiliary rotor baffle onto the rotor.

[0017] In some embodiments, the first mounting part is a cuboid column, with one axial end face of the first mounting part fitting against the auxiliary rotor baffle, the other axial end face of the first mounting part being parallel to one axial end face of the first mounting part, and the first mounting hole penetrating from one axial end face of the first mounting part to its other axial end face.

[0018] In some embodiments, a main rotor baffle and an outer fan blade are also included. The main rotor baffle is disposed on the other axial end face of the rotor. One axial end of the main rotor baffle is connected to the rotor, and the other axial end is provided with the outer fan blade. The outer fan blade includes a second mounting part and a second fan blade. The second mounting part is fixedly mounted on the end face of the other axial end of the main rotor baffle. Along the axial direction of the rotor, the second fan blade is connected to the axial end of the second mounting part away from the main rotor baffle, and the second fan blade extends together in the axial direction away from the second mounting part and in the radially outward direction.

[0019] In some embodiments, the second fan blade includes a second leeward surface relatively close to the second mounting portion and a second windward surface relatively far from the second mounting portion. The second windward surface is a plane or an arc surface. When the second windward surface is a plane, it intersects the axial end face of the main rotor baffle at an inclination angle ∠B. When the second windward surface is an arc surface, the tangent at any point on the second windward surface intersects the axial end face of the main rotor baffle at an inclination angle ∠B'.

[0020] In some embodiments, when the second windward surface is a plane and the second windward surface intersects the axial end face of the main rotor baffle at an inclination, with an inclination angle ∠B between them, ∠B∈[0°,45°]; when the second windward surface is an arc surface and the tangent at any point on the second windward surface intersects the axial end face of the main rotor baffle at an inclination, with an inclination angle ∠B' between them, ∠B'∈[0°,45°].

[0021] In some embodiments, the second fan blade further includes a second windward end and a second leeward end. The second windward end connects the second windward surface and the second leeward surface, forming a second leading edge of the second fan blade. In one second fan blade, the second leading edge is the first to contact the airflow. The second leeward end connects the second windward surface and the second leeward surface, forming a second trailing edge of the second fan blade. In one second fan blade, the second trailing edge is the last to contact the airflow.

[0022] In some embodiments, the second leading edge is a surface located radially outside the second mounting portion, the second leading edge includes a leading edge plane and a leading edge arc surface, the arc radius of the leading edge arc surface is R5, and the second trailing edge is a surface located radially outside the second mounting portion, which includes a trailing edge plane and a trailing edge arc surface, the arc radius of the trailing edge arc surface is R6, and R6≥R5.

[0023] Alternatively, the second leading edge is a surface located radially outside the second mounting portion, the second leading edge only includes a leading edge arc surface with a radius of R5, and the second trailing edge is a surface located radially outside the second mounting portion, which only includes a trailing edge arc surface with a radius of R6, and R6≥R5.

[0024] In some embodiments, the second fan blade further includes a starting edge and a terminating edge located radially inside the second mounting portion. The starting edge is connected to the second leading edge, and the terminating edge is connected to the second trailing edge. Both the starting edge and the terminating edge are planar structures, and the included angle between the two right angles is ∠C, where ∠C ∈ [0°, 60°].

[0025] In some embodiments, the second fan blade further includes an outer fan blade arc portion located radially inside the second mounting portion, the outer fan blade arc portion being connected between the starting edge and the ending edge, and the outer fan blade arc portion having an arc surface structure with an arc surface radius of R4; the motor assembly further includes a crankshaft, the outer circumferential surface radius of the crankshaft relative to the outer fan blade arc portion being R3, and R4 > R3.

[0026] In some embodiments, the outer fan blades have at least two, and at least two second mounting portions are arranged circumferentially spaced along the rotor. The second fan blades of the at least two outer fan blades extend axially. Among two adjacent outer fan blades, and within the axial end face projection plane, at least a portion of the second trailing edge of the second fan blade of the outer fan blade located upstream in the airflow direction covers the second leading edge of the second fan blade of the outer fan blade located downstream. The area covered is (0-10%) of the area of ​​the second fan blade within the axial end face projection plane.

[0027] In some embodiments, a main balancing block is also included, which is disposed on the main rotor baffle and is located radially outside the second mounting portion and along the axial direction. The main balancing block is located between the second fan blade and the main rotor baffle, and the second fan blade does not contact the main balancing block.

[0028] In some embodiments, the second mounting part is a column structure with a second mounting hole. The motor assembly also includes a second fastener, which passes through the second mounting hole to integrally mount the second mounting part and the main rotor baffle onto the rotor.

[0029] In some embodiments, the second mounting part is a cuboid column, with one axial end face of the second mounting part fitting against the main rotor baffle, the other axial end face of the second mounting part being parallel to one axial end face of the first mounting part, and the second mounting hole penetrating from one axial end face of the first mounting part to its other axial end face.

[0030] The present invention also provides a compressor comprising a motor assembly of the compressor described in any of the preceding claims, and further comprising a housing, the motor assembly being disposed inside the housing, the housing being a communicating housing or a non-communicating housing.

[0031] When the housing is a connected housing, both of its axial ends are open, and the inner fan blades are disposed at both axial ends or either axial end of the rotor; when the housing is a non-connected housing, one axial end is an open end and the other axial end is a closed end, and the inner fan blades are disposed at the axial end of the rotor facing the closed end and the axial end of the rotor facing the open end.

[0032] In some embodiments, when an outer fan blade is also included, and when the housing is a connected housing, the outer fan blade is disposed at both axial ends or either axial end of the rotor; when the housing is a non-connected housing, the outer fan blade is disposed at one axial end of the rotor facing the open end.

[0033] In some embodiments, the system further includes a terminal assembly and a stator located radially outward from the rotor and connected to the housing. The stator is electrically connected to the terminal assembly via stator leads.

[0034] The housing includes a middle portion and a tail portion, the middle portion of the housing corresponds to one axial end of the rotor, and the tail portion of the housing corresponds to the other axial end of the rotor;

[0035] When the housing is a connected housing, the outer fan blade is disposed at one axial end of the rotor opposite to the middle of the housing, and / or disposed at one axial end of the rotor opposite to the tail of the housing; when the housing is a non-connected housing, the outer fan blade is disposed at one axial end of the rotor opposite to the middle of the housing.

[0036] In some embodiments, D2 is twice the distance between the innermost radial side of the stator lead and the rotor center hole; D3 is the inner diameter of the middle part of the housing; D33 is the inner diameter of the tail part of the housing; D1 is twice the distance between the outermost radial end of the outer fan blade located opposite the middle part of the housing and the rotor center hole; and D11 is twice the distance between the outermost radial end of the outer fan blade located opposite the tail part of the housing and the rotor center hole.

[0037] When the housing is a connected housing or a non-connected housing, and the terminal assembly is located in the middle of the housing, if an outer fan blade is provided at one axial end of the rotor at a position opposite to the middle of the housing, then D1 < D2 < D3.

[0038] When the housing is a connected housing or a non-connected housing, and the terminal assembly is located at the tail of the housing, if an outer fan blade is provided at one axial end of the rotor that is located opposite to the middle of the housing, then D1 < D3, D2 < D33.

[0039] When the housing is a connected housing, and the terminal assembly is located in the middle of the housing, and an outer fan blade is provided at one axial end of the rotor that is opposite to the middle of the housing, and an outer fan blade is also provided at one axial end of the rotor that is opposite to the tail of the housing, then D1 < D2 < D3, and D11 < D33.

[0040] When the housing is a connected housing, and the terminal assembly is located at the tail of the housing, and an outer fan blade is provided at one axial end of the rotor opposite to the middle of the housing, and an outer fan blade is also provided at one axial end of the rotor opposite to the tail of the housing, then D11 < D2 < D33, and D1 < D3.

[0041] The present invention also provides an air conditioner comprising the compressor described in any of the preceding claims.

[0042] The present invention provides a compressor motor assembly, a compressor, and an air conditioner, which have the following beneficial effects:

[0043] 1. The present invention provides an inner fan blade on a secondary rotor baffle connected to the shaft end of the rotor. The inner fan blade includes a first mounting part and a first fan blade. One end of the first fan blade is connected to the first mounting part, and the other end extends radially inward, i.e., toward the central hole of the rotor, forming an inner fan blade structure. This ensures that the overall structure of the inner fan blade does not extend radially outward from the secondary rotor baffle and does not extend excessively in the axial direction. Therefore, the inner fan blade structure of the present invention can be effectively provided at the axial end opposite to the closed end of the rotor and the non-connected housing, effectively utilizing the air in this part, increasing the air velocity, thereby effectively increasing the suction volume of the pump body structure inside the compressor, and thus increasing the cooling capacity of the compressor.

[0044] 2. The present invention also includes an outer fan blade structure provided on the main rotor baffle connected to the shaft end of the rotor. The outer fan blade includes a second mounting part and a second fan blade. The second fan blade is mounted on the shaft end of the second mounting part away from the main rotor baffle and extends axially and radially. This allows the second fan blade to extend as far as possible in the axial direction while minimizing its extension in the radially outward direction. This reduces interference with the stator, terminals, and wiring caused by the outer fan blade extending only radially outward, and also effectively prevents interference with the inner circumference of the housing. This allows for a smaller inner diameter of the housing, thereby further reducing the overall size of the machine while increasing the airflow rate driven by the outer fan blade, increasing the pump's suction capacity, and increasing the cooling capacity. Furthermore, the axially outward extension also avoids interference with the main balance block, thus ensuring the effective and normal operation of the motor rotor and increasing the gas flow rate and suction capacity. Attached Figure Description

[0045] Figure 1 This is a longitudinal cross-sectional structural diagram of a scroll compressor in the background technology;

[0046] Figure 2 This is a cross-sectional view of the motor assembly and pump body assembly inside the scroll compressor of the present invention.

[0047] Figure 3 This is a three-dimensional structural diagram of the motor assembly of the present invention;

[0048] Figure 4 yes Figure 3 A schematic diagram of the bottom structure of the motor assembly;

[0049] Figure 5 This is a front view of the motor assembly of the present invention excluding the crankshaft;

[0050] Figure 5a yes Figure 5 A schematic diagram of the structure of the inner fan blades at the bottom;

[0051] Figure 5b yes Figure 5A schematic diagram of the complete structure at the top center;

[0052] Figure 6a This is a three-dimensional structural diagram of the inner fan blade of the present invention;

[0053] Figure 6b yes Figure 6a Left view of the inner fan blades;

[0054] Figure 7a This is a perspective structural diagram of the outer fan blade embodiment 1 of the present invention;

[0055] Figure 7b This is a perspective structural diagram of embodiment 2 of the outer fan blade of the present invention;

[0056] Figure 7c yes Figure 7a or Figure 7b The right-view structural diagram;

[0057] Figure 8a This is a cross-sectional view of the compressor with a non-connecting housing of the present invention after assembly;

[0058] Figure 8b This is a cross-sectional view of the compressor with a non-connecting housing of the present invention during the assembly process;

[0059] Figure 9a This is a cross-sectional view of the compressor with a connected housing of the present invention after assembly;

[0060] Figure 9b This is a cross-sectional view of the compressor with a connected housing of the present invention during the assembly process;

[0061] Figure 10a This is an axial sectional view of the compressor of the present invention with the terminal block assembled in the middle of the housing and the outer fan blade assembled in the middle of the housing;

[0062] Figure 10b This is an axial sectional view of the compressor of the present invention with the terminal block assembled at the rear of the housing and the outer fan blades assembled at the rear of the housing.

[0063] The reference numerals in the attached figures are as follows:

[0064] 1. Rotor; 2. Auxiliary rotor baffle; 3. Inner fan blade; 31. First mounting part; 311. First mounting hole; 32. First fan blade; 321. First windward surface; 322. First leeward surface; 323. First leading edge; 324. First trailing edge; 41. First fastener; 42. Second fastener; 5. Main rotor baffle; 6. Outer fan blade; 61. Second mounting part; 611. Second mounting hole; 62. Second fan blade; 62 1. Second windward side; 622. Second leeward side; 623. Second leading edge; 624. Second trailing edge; 625. Starting edge; 626. Terminating edge; 627. Outer fan blade arc; 71. Secondary balance block; 72. Main balance block; 8. Crankshaft; 9. Housing; 91. Middle part of housing; 92. Tail part of housing; 10. Terminal assembly; 11. Stator; 12. Stator lead wire; 13. Bearing; 14. Rear cover; 15. Front cover. Detailed Implementation

[0065] like Figure 2-10b As shown, the present invention provides a motor assembly for a compressor, comprising:

[0066] The rotor 1, the auxiliary rotor baffle 2, and the inner fan blade 3 are provided. The auxiliary rotor baffle 2 is disposed on one axial end face of the rotor 1. One axial end of the auxiliary rotor baffle 2 is connected to the rotor 1, and the inner fan blade 3 is disposed on the other axial end. The inner fan blade 3 includes a first mounting part 31 and a first fan blade 32. The first mounting part 31 is fixedly mounted on the end face of the other axial end of the auxiliary rotor baffle 2. Along the radial direction of the rotor 1, the first fan blade 32 is connected to the radial inner side of the first mounting part 31, and the first fan blade 32 extends toward the central hole of the rotor 1, so that the overall structure of the inner fan blade 3 does not exceed the radial outer periphery of the auxiliary rotor baffle 2.

[0067] This invention provides an inner fan blade on a secondary rotor baffle connected to the shaft end of the rotor. The inner fan blade includes a first mounting part and a first fan blade. One end of the first fan blade is connected to the first mounting part, and the other end extends radially inward, i.e., toward the central hole of the rotor, forming an inner fan blade structure. This ensures that the overall structure of the inner fan blade does not extend radially outward from the secondary rotor baffle and does not extend excessively in the axial direction. Therefore, the inner fan blade structure of this invention can be effectively provided at the axial end opposite to the closed end of the rotor and the non-connected housing, effectively utilizing the air in this part, increasing the air velocity, thereby effectively increasing the suction volume of the pump body structure inside the compressor, and thus increasing the cooling capacity of the compressor.

[0068] This invention proposes a compressor that accelerates internal refrigerant flow, specifically including the following aspects: 1. Adding an inner fan blade component to at least one side of the compressor rotor; 2. Further, including an outer fan blade; 3. Further, the tilt angle of the fan blade is related to the rotor's rotation direction, accelerating the refrigerant during rotation; 4. Further, the fan blade is fixed by screws or rivets that originally penetrated the rotor; 5. Further, different fan blade specifications are selected on both sides of the rotor depending on the housing type. This can accelerate the refrigerant flow velocity in the low-pressure chamber region of the compressor, thereby increasing the flow rate and achieving local pressurization, ultimately improving the cooling capacity, and also enhancing the lubrication effect on the moving disc bearing and the support bearing.

[0069] It can solve the following technical problems:

[0070] 1. Increase the refrigerant flow rate in the low-pressure chamber of the compressor, thereby increasing the flow rate and achieving local pressurization, ultimately improving the cooling capacity; 2. Enhance the lubrication effect on the moving plate bearing and the support bearing.

[0071] 1) The present invention adds a fan blade component to at least one side of the compressor rotor assembly.

[0072] like Figure 2-4 The crankshaft rotor assembly shown in the example consists of a crankshaft and a compressor rotor assembly. The rotor assembly comprises a main balance block, a secondary balance block, and a rotor.

[0073] like Figures 6a-7c As shown, the fan blade part refers to a part whose main body is cylindrical and has an inclined platform. Preferably, the cylindrical part of the main body can work together with its matching parts to provide a limiting function, such as the inner fan blade - square and the outer fan blade - square in the example.

[0074] Both the inner and outer fan blades can be paired with the main and auxiliary balance blocks, or with the main and auxiliary rotor baffles.

[0075] 2) The fan blade structure consists of inner fan blades and outer fan blades.

[0076] Features of the inner fan blades:

[0077] ① After installation, the side diameter of the rotor assembly with inner fan blades and inclined platform shall not exceed the inner diameter of the stator. Figures 8a-8b In G1 < H1), it extends inward;

[0078] ②For example Figures 6a-6b As shown, the [inner fan blade-sloping platform] is composed of the [inner fan blade-leading edge] and the [inner fan blade-rear edge], and is inclined at ∠A with the [inner fan blade-mounting surface], where ∠A∈[0°,45°], preferably 45°, and the transition intersection is preferably a rounded transition;

[0079] ③ To facilitate processing and save materials and space, it is preferable that the [inner fan blade - leading edge] and [inner fan blade - trailing edge] do not exceed the plane of the [inner fan blade - mounting surface] and do not exceed the plane of the [inner fan blade - square].

[0080] ④ In order to enhance the installation limit capability and increase the area of ​​the ramp, the [inner fan blade - arc part] can be extended inward with a radius of R2, corresponding to the radius of the concentric circle R1 at the crankshaft position, satisfying R2 > R1;

[0081] ⑤ For example Figure 5-5b As shown, after the rotor assembly is installed at the lower end, the interference area of ​​the inner fan blade projection should be controlled within 0-10%, preferably without interference, so that the refrigerant can easily enter and exit.

[0082] In some embodiments, the first fan blade 32 includes a first windward surface 321 relatively close to the auxiliary rotor baffle 2 and a first leeward surface 322 relatively far from the auxiliary rotor baffle 2. The first windward surface 321 is a plane or an arc surface. When the first windward surface 321 is a plane, the plane intersects the axial end face of the auxiliary rotor baffle 2 at an inclination angle ∠A. When the first windward surface 321 is an arc surface, the tangent at any point on the arc surface intersects the axial end face of the auxiliary rotor baffle 2 at an inclination angle ∠A'. This is a preferred structural form of the first fan blade of the present invention, that is, the first fan blade is inclined to the axial end face of the rotor, and the airflow can be driven from one end of the rotor axis to the other end of the axis by the rotation of the first fan blade via the first windward surface, forming the effect of axially driven airflow. The first windward surface can be a plane or an arc surface, both of which can play the role of axially driving gas flow.

[0083] In some embodiments, when the first windward surface 321 is a plane, and the plane intersects the axial end face of the auxiliary rotor baffle 2 at an inclination angle ∠A, ∠A ∈ [0°, 45°]; when the first windward surface 321 is an arc surface, and the tangent at any point on the arc surface intersects the axial end face of the auxiliary rotor baffle 2 at an inclination angle ∠A', ∠A' ∈ [0°, 45°]. Preferably, the inclination angle between the first windward surface of the first blade and the axial end face is between 0° and 45° to maximize the driving force of the airflow, and this angle is further preferably 45°.

[0084] In some embodiments, the first fan blade 32 further includes a first windward end and a first leeward end. The first windward end connects the first windward surface 321 and the first leeward surface 322, forming a first leading edge 323 of the first fan blade 32. In one first fan blade, the first leading edge is the first to contact the airflow. The first leeward end connects the first windward surface 321 and the first leeward surface 322, forming a first trailing edge 324 of the first fan blade 32. In one first fan blade, the first trailing edge 324 is the last to contact the airflow. This is a further preferred structural form of the first fan blade of the present invention, namely, the first leading edge and the first trailing edge are provided between the first windward surface and the first leeward surface, such that the first leading edge is located at the foremost point in contact with the airflow, enabling it to effectively cut the airflow, so that the airflow generated by the cutting is driven by the first windward surface to flow axially.

[0085] In some embodiments, the inner fan blades 3 have at least two, and at least two first mounting portions 31 are spaced apart circumferentially along the rotor 1. The first fan blades 32 of the at least two inner fan blades extend radially inward. In adjacent inner fan blades, and within the axial end face projection plane, at least a portion of the first trailing edge 324 of the first fan blade 32 of the inner fan blade located upstream in the airflow direction is covered by the first leading edge 323 of the first fan blade 32 of the inner fan blade located downstream. This invention proposes a split-blade design suitable for use inside a compressor by setting the inner fan blades to a plurality of separate structures. This blade is suitable for compressor installation and use, can increase the internal flow rate of the compressor, can be directly machined without casting, and facilitates timely parameter correction. The upstream first trailing edge partially covering the downstream first leading edge ensures that the airflow does not flow directly between the two fan blades without passing through the first windward surface, further maximizing the axial driving effect on the airflow. This is the preferred structural form of this invention. Of course, the first trailing edge of the upstream first fan blade may not be covered by the first leading edge of the downstream first fan blade.

[0086] In some embodiments, a secondary balance block 71 is also included. The secondary balance block 71 is disposed on the secondary rotor baffle 2 and is located between two adjacent first mounting portions 31. The first fan blade 32 does not contact the secondary balance block 71. The secondary balance block of the present invention is used to adjust the balancing force and balancing torque. It is spaced apart from the first mounting portion, which can maximize the utilization of the structure of the secondary rotor baffle and ensure the balanced weight of the rotor while increasing the airflow velocity.

[0087] The present invention further optimizes the axial height of the inner fan blades to not exceed the secondary balance block, so no additional space is added to set the inner fan blade structure, so that the space is not increased, saving and effectively utilizing the space.

[0088] In some embodiments, the first mounting part 31 is a cylindrical structure with a first mounting hole 311. The motor assembly also includes a first fastener 41, which passes through the first mounting hole 311 to integrally mount the first mounting part 31 and the auxiliary rotor baffle 2 onto the rotor 1. This is a preferred structural form of the first mounting part of the present invention, the purpose of which is to effectively mount the first fan blade onto the auxiliary rotor baffle. The first fastener is a baffle that fixes the auxiliary rotor baffle onto the rotor. The present invention effectively utilizes this first fastener to integrally fix the auxiliary rotor baffle and the inner fan blade onto the rotor without increasing the space occupation too much.

[0089] In some embodiments, the first mounting portion 31 is a cuboid prism, with one axial end face fitting against the auxiliary rotor baffle 2. The other axial end face of the first mounting portion 31 is parallel to one axial end face of the first mounting portion 31, and the first mounting hole 311 extends from one axial end face of the first mounting portion 31 to its other axial end face. This is a further preferred structural form of the first mounting portion of the present invention, namely, a cuboid structure. The first mounting hole extends axially through the first mounting portion, which facilitates the first fastener to pass through the first mounting portion and the auxiliary rotor baffle in sequence to fix them to the rotor.

[0090] In some embodiments, a main rotor baffle 5 and an outer fan blade 6 are also included. The main rotor baffle 5 is disposed on the other axial end face of the rotor 1. One axial end of the main rotor baffle 5 is connected to the rotor 1, and the other axial end is provided with the outer fan blade 6. The outer fan blade 6 includes a second mounting part 61 and a second fan blade 62. The second mounting part 61 is fixedly mounted on the end face of the other axial end of the main rotor baffle 5. Along the axial direction of the rotor 1, the second fan blade 62 is connected to the axial end of the second mounting part 61 away from the main rotor baffle 5, and the second fan blade 62 extends together in the axial direction away from the second mounting part 61 and in the radially outward direction.

[0091] The present invention also includes an outer fan blade structure provided on the main rotor baffle connected to the shaft end of the rotor. The outer fan blade includes a second mounting part and a second fan blade. The second fan blade is mounted on the shaft end of the second mounting part away from the main rotor baffle and extends axially and radially. This allows the second fan blade to extend as far as possible in the axial direction while minimizing its extension in the radial outward direction. This reduces interference with the stator, terminals, and wiring caused by the outer fan blade extending only radially outward, and also effectively prevents interference with the inner circumference of the housing. This allows the inner diameter of the housing to be made smaller, thereby further reducing the overall size of the machine while increasing the air flow rate driven by the outer fan blade, increasing the pump's suction capacity, and increasing the cooling capacity. Furthermore, the axial outward extension also avoids interference with the main balance block, thus ensuring the effective and normal operation of the motor rotor and increasing the gas flow rate and suction capacity.

[0092] Features of the outer fan blades:

[0093] ① After installation, the side diameter of the rotor assembly with [outer fan blades-sloping platform] exceeds the inner diameter of the stator ( Figure 8b (G1 > H1 in the original text), and extends inward and outward;

[0094] ②For example Figures 7a-7c As shown, the [outer fan blade - inclined platform] is composed of multiple edges and is inclined at ∠B with the [outer fan blade - mounting surface], where ∠B ∈ [0°, 45°], preferably 45°, and the transition intersection is preferably a rounded transition;

[0095] ③ To improve the utilization rate of rotor axial space, the [outer fan blade-sloping platform] should extend in a direction lagging behind the [outer fan blade-starting edge]; such as Figure 5-5b Looking at a single outer fan blade, its higher ramp is located at the rear end in the direction of rotation, while the lower part is located at the front end. The purpose of this is to drive the airflow from the lower end to the upper end axially.

[0096] ④ To maximize the area of ​​the fan blades, the angle C between the [outer fan blade-leading edge arc] and its adjacent edge, the [outer fan blade-rear edge arc] and its adjacent edge, and the [outer fan blade-starting edge] and [outer fan blade-ending edge] can be adjusted, where R6≥R5, and ∠C∈[0°,60°].

[0097] ⑤ In order to enhance the installation limit capability and increase the area of ​​the inclined platform, the [outer fan blade - arc part] can be extended inward with a radius of R4, corresponding to the radius of the concentric circle R3 at the crankshaft position, satisfying R4 > R3;

[0098] ⑥ For example Figure 5-5b As shown, after the rotor assembly is installed on the upper end, the interference area of ​​the outer fan blade projection should be controlled within 0-10%, preferably without interference, so that the refrigerant can easily enter and exit.

[0099] 3) The blade tilt angle of this invention is related to the rotor rotation direction, and accelerates the refrigerant during rotation.

[0100] like Figure 5-5b As shown, on both sides of the rotor assembly, referred to as the lower end and upper end of the rotor assembly, there are flow holes inside the rotor.

[0101] In this example, the lower end of the rotor assembly includes: a secondary balance block and inner fan blades.

[0102] In this example, the upper part of the rotor assembly includes: the main balance block and the outer fan blades.

[0103] Looking from the bottom of the rotor assembly upwards, this example shows clockwise rotation; looking from the top of the rotor assembly downwards, this example shows counterclockwise rotation.

[0104] from Figure 5-5b Looking at the inner fan blades at the lower end of the rotor assembly, observe each individual inner fan blade to obtain... Figures 6a-6b .

[0105] like Figures 6a-6b As shown, at this time, the inner fan blade moves to the right, and the inner fan blade angle A must ensure that the colliding refrigerant moves towards the moving and stationary discs through the rotor flow hole, and imparts kinetic energy to the refrigerant through the rotation speed.

[0106] At this time, as Figure 2 The [refrigerant-state a] shown will change to [refrigerant-state b], and the refrigerant flow rate through the inner fan blades will increase for the first time.

[0107] Note: There will still be refrigerant that does not pass through the inner fan blades and flows upward from other places, such as the [stator-casing gap], [stator internal gap], and [stator-rotor gap], but the overall average flow velocity will increase.

[0108] from Figure 5-5b Looking at the outer fan blades at the upper end of the rotor assembly, observe each individual outer fan blade to obtain... Figures 7a-7c .

[0109] like Figures 7a-7c As shown, at this time, the direction of movement of the outer fan blade is to the left, and the angle B of the outer fan blade needs to ensure that the colliding refrigerant moves towards the moving and stationary discs, and increases the kinetic energy of the refrigerant by rotating the fan.

[0110] At this time, as Figure 2 The [refrigerant-state b] shown will change to [refrigerant-state c], and the refrigerant flow rate through the outer fan blades will increase for the second time.

[0111] Note: Refrigerant flowing upward from the [stator-rotor gap] and [rotor flow hole] will pass through the outer fan blades. Refrigerant flowing upward from the [stator-casing gap] and [stator internal gap] may pass through the outer fan blades, but the overall average flow velocity increases.

[0112] In summary, in this example, the refrigerant enters the compressor in [refrigerant-state a], and after the first acceleration by the inner fan blades, its kinetic energy increases to [refrigerant-state b]. After the second acceleration by the outer fan blades, the compressor's cooling capacity is increased.

[0113] In some embodiments, the second fan blade 62 includes a second leeward surface 622 relatively close to the second mounting portion 61 and a second windward surface 621 relatively far from the second mounting portion 61. The second windward surface 621 is a plane or an arc surface. When the second windward surface 621 is a plane, it intersects the axial end face of the main rotor baffle 5 at an inclination angle ∠B. When the second windward surface 621 is an arc surface, any tangent on the second windward surface intersects the axial end face of the main rotor baffle 5 at an inclination angle ∠B'. This is a preferred structural form of the second fan blade of the present invention, that is, the second fan blade is inclined to the axial end face of the rotor, and the airflow can be driven from one end of the rotor axis to the other end of the axis by the rotation of the second fan blade via the second windward surface, forming an axially driven airflow effect. The second windward surface can be a plane or an arc surface, both of which can achieve the effect of axially driving gas flow.

[0114] In some embodiments, when the second windward surface 621 is a plane, and the second windward surface intersects the axial end face of the main rotor baffle 5 at an inclination angle ∠B, ∠B ∈ [0°, 45°]; when the second windward surface 621 is an arc surface, and a tangent surface at any point on the second windward surface intersects the axial end face of the main rotor baffle 5 at an inclination angle ∠B', ∠B' ∈ [0°, 45°]. Preferably, the inclination angle between the second windward surface of the second blade and the axial end face is between 0° and 45° to maximize the driving airflow force, and this angle is further preferably 45°.

[0115] In some embodiments, the second fan blade 62 further includes a second windward end and a second leeward end. The second windward end connects the second windward surface 621 and the second leeward surface 622, forming a second leading edge 623 of the second fan blade 62. In one second fan blade, the second leading edge 623 is the first to contact the airflow. The second leeward end connects the second windward surface and the second leeward surface, forming a second trailing edge 624 of the second fan blade 62. In one second fan blade, the second trailing edge 624 is the last to contact the airflow. This is a further preferred structural form of the second fan blade of the present invention, namely, the second leading edge and the second trailing edge are provided between the second windward surface and the second leeward surface, such that the second leading edge is located at the foremost point in contact with the airflow, enabling it to effectively cut the airflow, so that the airflow generated by the cutting is driven by the second windward surface to flow axially.

[0116] In some embodiments, the second leading edge 623 is a surface located radially outside the second mounting portion 61, the second leading edge 623 includes a leading edge plane and a leading edge arc surface, the arc radius of the leading edge arc surface is R5, and the second trailing edge 624 is a surface located radially outside the second mounting portion 61, it includes a trailing edge plane and a trailing edge arc surface, the arc radius of the trailing edge arc surface is R6, and R6≥R5;

[0117] Alternatively, the second leading edge 623 is a surface located radially outside the second mounting portion 61, the second leading edge only includes a leading edge arc surface with a radius of R5, and the second trailing edge 624 is a surface located radially outside the second mounting portion 61, which only includes a trailing edge arc surface with a radius of R6, and R6≥R5.

[0118] The present invention sets the leading edge arc surface and the trailing edge arc surface of the second leading edge to have a larger radius than the trailing edge arc surface, so that the leading edge arc surface can have a larger contact area with the airflow, providing driving force and further improving the effect of axially driving the airflow; Embodiment 1 of the present invention is a structure in which the outer fan blade includes a leading edge plane and a leading edge arc surface, as well as a trailing edge plane and a trailing edge arc surface; Embodiment 2 is a structure that only includes a leading edge arc surface and a trailing edge arc surface.

[0119] In some embodiments, the second blade 62 further includes a starting edge 625 and a ending edge 626 located radially inner to the second mounting portion 61. The starting edge 625 is connected to the second leading edge 623, and the ending edge 626 is connected to the second trailing edge 624. Both the starting edge 625 and the ending edge 626 are planar structures, and the included angle between the two right angles is ∠C, where ∠C ∈ [0°, 60°]. By setting the included angle between the starting edge and the ending edge to 0 to 60°, the present invention can effectively ensure the unfolding angle of the second windward surface, thereby effectively increasing the windward area and improving the axial airflow force. However, it cannot be too large, otherwise interference between adjacent blades or interference with other components will occur.

[0120] In some embodiments, the second fan blade 62 further includes an outer fan blade arc portion 627 located radially inner to the second mounting portion 61. The outer fan blade arc portion 627 connects the starting edge 625 and the ending edge 626, and the outer fan blade arc portion 627 has an arc surface structure with an arc radius of R4. The motor assembly also includes a crankshaft 8, the outer circumferential radius of which is R3 relative to the outer fan blade arc portion 627, and R4 > R3. The fact that the radius of the outer fan blade arc portion of the present invention is greater than the outer circumferential radius of the crankshaft opposite it ensures that the outer fan blade does not interfere with the crankshaft, guaranteeing the normal axial driving airflow effect of the outer fan blade.

[0121] In some embodiments, the outer fan blade 6 has at least two, and at least two second mounting portions 61 are arranged circumferentially spaced along the rotor 1. The second fan blades 62 of the at least two outer fan blades extend axially. In adjacent outer fan blades, and within the axial end-face projection plane, at least a portion of the second trailing edge 624 of the second fan blade of the upper outer fan blade in the airflow direction covers the second leading edge 623 of the second fan blade of the lower outer fan blade; the covered area is [0-10%] of the area of ​​the second fan blade 62 within the axial end-face projection plane. This invention proposes a split-blade design suitable for use inside a compressor by also configuring the outer fan blades as multiple and separate. This blade is suitable for compressor installation and use, can increase the internal flow rate of the compressor, can be directly machined without casting, and facilitates timely parameter correction through practical application. The upper second trailing edge partially covering the lower second leading edge ensures that the airflow does not flow directly between the two fan blades without the action of the second windward surface, further maximizing the axial driving effect on the airflow. This is the preferred structural form of the present invention. Of course, the second trailing edge of the second blade located upstream of the present invention may not be covered by the second leading edge of the second blade located downstream. When the coverage area is 0, it is the case of no coverage.

[0122] In some embodiments, a main balancing block 72 is also included. The main balancing block 72 is disposed on the main rotor baffle 5 and is located radially outside the second mounting portion 61. Along the axial direction, the main balancing block 72 is positioned between the second fan blade 62 and the main rotor baffle 5, and the second fan blade 62 does not contact the main balancing block 72. The main balancing block of the present invention is used to adjust the balancing force and balancing torque. Located radially outside the second mounting portion, it maximizes the utilization of the main rotor baffle structure, ensuring rotor balance while increasing airflow velocity; and there is no interference between the second fan blade and the main balancing block.

[0123] In some embodiments, the second mounting part 61 is a cylindrical structure with a second mounting hole 611. The motor assembly also includes a second fastener 42, which passes through the second mounting hole 611 to integrally mount the second mounting part 61 and the main rotor baffle 5 onto the rotor 1. This is a preferred structural form of the second mounting part of the present invention, the purpose of which is to effectively mount the second fan blade onto the main rotor baffle. The second fastener is a baffle that fixes the auxiliary rotor baffle onto the rotor. The present invention effectively utilizes this second fastener to integrally fix the main rotor baffle and the outer fan blade onto the rotor without increasing the space occupation too much.

[0124] In some embodiments, the second mounting portion 61 is a cuboid prism, with one axial end face fitting against the main rotor baffle 5. The other axial end face of the second mounting portion 61 is parallel to one axial end face, and the second mounting hole 611 extends from one axial end face to the other axial end face. This is a further preferred structural form of the second mounting portion of the present invention, namely, a cuboid structure. The second mounting hole extends axially through the second mounting portion, facilitating the second fastener to pass sequentially through the second mounting portion and the main rotor baffle to fix both onto the rotor.

[0125] 4) The fan blades of the present invention are fixed by screws or rivets that originally penetrated the rotor.

[0126] like Figure 2-4 As shown, the inner and outer fan blades are locked together by rotor screws and rotor nuts, or fixed by rivets. Looking from bottom to top, the rotor screws pass through the following in axial direction in sequence: inner fan blade (secondary balance block), secondary rotor baffle, rotor, main rotor baffle, main balance block (outer fan blade on the main rotor baffle), and outer fan blade on the main balance block.

[0127] Assume the rotor is allowed to pass through X1 screws, X2 inner fan blades, and X3 outer fan blades, satisfying the following relationship:

[0128] X1≥X2; X1≥X3. The screws were originally used to mount the baffle, so some of these screws are used to mount the fan blades; some screws are not used to mount the fan blades.

[0129] Preferably, the number of fan blades is maximized, as more blades result in greater airflow and a better overall acceleration effect on the refrigerant; secondly, the number is kept in an odd number to reduce the vibration impact caused by resonance.

[0130] The present invention also provides a compressor comprising a motor assembly of the compressor described in any of the preceding claims, and further comprising a housing 9, wherein the motor assembly is disposed inside the housing 9, and the housing 9 is a communicating housing or a non-communicating housing.

[0131] When the housing 9 is a connected housing, both of its axial ends are open ends, and the inner fan blade 3 is disposed at both axial ends or either axial end of the rotor 1; when the housing 9 is a non-connected housing, one axial end is an open end and the other axial end is a closed end, and the inner fan blade 3 is disposed at the axial end of the rotor 1 facing the closed end and the axial end of the rotor 1 facing the open end.

[0132] The inner fan blade structure of the present invention is mainly applicable to the closed end of a non-connected housing. Since the rotor part of the closed end needs to be connected with the bearing 13, there is no extra space to set the existing outer fan blade structure. This application effectively utilizes this point by setting the inner fan blade on the auxiliary rotor baffle, and it does not exceed the outer diameter of the rotor and the height of the auxiliary balance block in the axial and radial directions. This allows for the effective utilization of the airflow in this part, thereby improving the axial driving effect of the airflow, increasing the suction speed of the pump body, increasing the suction volume, and increasing the cooling capacity of the compressor.

[0133] In some embodiments, when an outer fan blade 6 is also included, and when the housing 9 is a communicating housing, the outer fan blade 6 is disposed at both axial ends or either axial end of the rotor 1; when the housing 9 is a non-communicating housing, the outer fan blade 6 is disposed at one axial end of the rotor 1 facing the open end. The present invention, through the placement of the outer fan blade, can further increase the driving effect on the airflow, further increase the airflow velocity, increase the flow rate, and thus increase the intake volume; while the outer fan blade can be disposed at both ends of a communicating housing, except for the closed end of a non-communicating housing, it can also be disposed at the open end of a non-communicating housing.

[0134] 5) Depending on the casing type, different fan blade specifications are selected on both sides of the rotor.

[0135] like Figures 8a-9bAs shown, housings in the industry can be divided into non-connected housings and connected housings. This can be determined by the location of the bearing in the housing within the component; a non-connected housing is used on the main body, while a connected housing is used on other components. A part that can only be assembled from one side is called a non-connected housing; a part that can be assembled from both sides is called a connected housing.

[0136] like Figures 8a-8b As shown, for non-connected housings, the following fan blade configurations can be selected (the direction near the front cover assembly is the left side, and the other side is the right side).

[0137] ① Left inner fan blade or right inner fan blade

[0138] ②Left inner fan blade + Right inner fan blade

[0139] ③Left outer fan blade + right inner fan blade

[0140] In terms of performance, ③ > ② > ① because the motor must be installed first, and it needs to be matched with the housing bearings. After the motor is installed, the outer fan blades cannot be installed on the closed end of the housing.

[0141] The installation method described in section ③ involves first fixing the upper and lower ends of the rotor assembly on both sides to the rotor using screws or rivets to form the rotor assembly. Then, the crankshaft is placed into the rotor assembly using heat fitting or cold pressing. The crankshaft rotor assembly is then pressed into the bracket assembly to form the crankshaft bracket rotor assembly. After magnetization, it is placed into the housing assembly, at which point the end of the crankshaft is in contact with the housing bearing. Subsequent components are then assembled.

[0142] like Figures 9a-9b As shown, the connected housing can be configured with the following fan blade options (the direction near the front cover assembly is the left side, and the other side is the right side).

[0143] ① Left inner fan blade or right inner fan blade

[0144] ②Left inner fan blade + Right inner fan blade

[0145] ③Left outer fan blade + right inner fan blade, or left inner fan blade + right outer fan blade

[0146] ④ Left outer fan blade + right outer fan blade

[0147] In terms of effectiveness, ④ > ③ > ② > ①

[0148] The installation method described in section ④ involves first placing the crankshaft into the rotor using heat fitting or cold pressing, then placing it into the stator position within the housing assembly. Next, the upper and lower ends of the rotor assemblies on both sides are installed and fixed onto the rotor to form the crankshaft rotor assembly. Then, the bracket assembly is simultaneously placed into the housing assembly and pressed into the crankshaft rotor assembly to form the crankshaft bracket rotor assembly. After magnetization, the rear cover assembly is aligned and assembled with the housing assembly. At this point, the crankshaft end contacts the rear cover bearing. Subsequent components are then assembled.

[0149] In some embodiments, the system further includes a terminal assembly 10 and a stator 11, the stator 11 being located on the radial outer periphery of the rotor 1 and connected to the housing 9, the stator 11 being electrically connected to the terminal assembly 10 via stator leads 12.

[0150] The housing 9 includes a housing middle portion 91 and a housing tail portion 92. The housing middle portion 91 corresponds to one axial end of the rotor 1, and the housing tail portion 92 corresponds to the other axial end of the rotor 1.

[0151] When the housing 9 is a connected housing, the outer fan blade 6 is disposed at one axial end of the rotor 1 opposite to the middle part 91 of the housing, and / or disposed at one axial end of the rotor 1 opposite to the tail part 92 of the housing; when the housing 9 is a non-connected housing, the outer fan blade 6 is disposed at one axial end of the rotor 1 opposite to the middle part 91 of the housing.

[0152] Since the terminal block assembly can be set in several different ways—either in the middle of the housing, at the tail of the housing, or in both the middle and tail of the housing—the above-mentioned arrangement of the outer fan blade can effectively avoid interference with the stator leads.

[0153] In some embodiments, D2 is twice the distance between the stator lead 12 and the center hole of the rotor 1, D3 is the inner diameter of the middle part 91 of the housing, D33 is the inner diameter of the tail part 92 of the housing, D1 is twice the distance between the outermost radial end of the outer fan blade 6 opposite to the middle part 91 of the housing and the center hole of the rotor 1, and D11 is twice the distance between the outermost radial end of the outer fan blade 6 opposite to the tail part 92 of the housing and the center hole of the rotor 1.

[0154] When the housing 9 is a connected housing or a non-connected housing, and the terminal assembly 10 is disposed in the middle 91 of the housing, if an outer fan blade is provided at one axial end of the rotor 1 at a position opposite to the middle 91 of the housing, then D1 < D2 < D3.

[0155] When the housing 9 is a connected housing or a non-connected housing, and the terminal assembly 10 is disposed at the tail 92 of the housing, if an outer fan blade is provided at one axial end of the rotor 1 at a position opposite to the middle 91 of the housing, then D1 < D3, D2 < D33.

[0156] When the housing 9 is a connected housing, and the terminal assembly 10 is located in the middle of the housing, and an outer fan blade 6 is provided at one axial end of the rotor 1 located opposite to the middle of the housing 91, and an outer fan blade is also provided at one axial end of the rotor 1 located opposite to the tail of the housing, then D1 < D2 < D3, and D11 < D33.

[0157] When the housing 9 is a connected housing, and the terminal assembly 10 is located at the tail of the housing, and an outer fan blade is provided at one axial end of the rotor 1 located opposite to the middle of the housing, and an outer fan blade is also provided at one axial end of the rotor 1 located opposite to the tail of the housing, then D11 < D2 < D33, and D1 < D3.

[0158] By employing the aforementioned different housing forms, terminal wiring positions, and outer fan blade placement, this invention effectively avoids interference between the outer fan blade and the stator leads of the terminal, as well as collisions between the outer fan blade and the inner wall of the housing. Furthermore, in locations where stator leads are not provided, the outer diameter of the outer fan blade can be made appropriately larger, only needing to be smaller than the corresponding inner diameter of the housing. This further increases the area of ​​the axial drive airflow, improves drive efficiency, and increases intake and cooling capacity.

[0159] like Figures 8a-9b As shown, depending on the different usage requirements of the compressor, the industry will place the terminal block in the middle connection or the tail connection. The different positions of the terminal block will affect the size of the diameter of the outer fan blade rotation area.

[0160] Generally, non-connected shells are connected in the middle, while connected shells are connected in the middle or at the tail.

[0161] like Figure 10a As shown, the terminal block assembly is placed in the middle. The motor leads are led out from the upper end of the stator assembly and then connected to the terminal block assembly. At this time, the inner diameter D2 of the stator leads, the inner diameter D3 of the housing near the upper end of the rotor assembly, and the diameter D1 of the outer fan blade rotation area in the middle need to meet the following requirements:

[0162] D1 < D2 < D3

[0163] like Figure 10b As shown, the terminal assembly can be placed in the middle or at the tail. In this case, there will be a housing inner diameter D33 near the upper end of the rotor assembly and a diameter D11 of the outer fan blade rotation area at the tail.

[0164] When placed in the middle, the following conditions are met:

[0165] D1 < D2 < D3, D11 < D33

[0166] When the terminal block is located at the tail end, similarly, motor leads will be led out from the lower end of the stator assembly and connected to the terminal block assembly. At this time, there will be stator leads with an inner diameter D22 that satisfy:

[0167] D1 < D3, D11 < D2 < D33

[0168] The dimensional relationship here means that where there are terminals, the outer diameter of the outer fan blade should be smaller than the terminals, and where there are no terminals, the outer fan blade only needs to be smaller than the inner diameter of the housing, so as to maximize the diameter of the outer fan blade.

[0169] The present invention also provides an air conditioner comprising the compressor described in any of the preceding claims.

[0170] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the protection scope of the present invention.

Claims

1. A motor assembly for a compressor, characterized in that: include: The rotor (1), the auxiliary rotor baffle (2), and the inner fan blade (3) are provided. The auxiliary rotor baffle (2) is disposed on one axial end face of the rotor (1). One axial end of the auxiliary rotor baffle (2) is connected to the rotor (1), and the other axial end is provided with the inner fan blade (3). The inner fan blade (3) includes a first mounting part (31) and a first fan blade (32). The first mounting part (31) is fixedly mounted on the end face of the other axial end of the auxiliary rotor baffle (2). Along the radial direction of the rotor (1), the first fan blade (32) is connected to the radial inner side of the first mounting part (31), and the first fan blade (32) extends toward the central hole of the rotor (1), so that the overall structure of the inner fan blade (3) does not exceed the radial outer periphery of the auxiliary rotor baffle (2). It also includes a main rotor baffle (5) and an outer fan blade (6). The main rotor baffle (5) is disposed on the other end face of the rotor (1) in the axial direction. One end of the main rotor baffle (5) is connected to the rotor (1) in the axial direction, and the other end of the main rotor baffle (5) is provided with the outer fan blade (6). The outer fan blade (6) includes a second mounting part (61) and a second fan blade (62). The second mounting part (61) is fixedly mounted on the end face of the other end of the main rotor baffle (5) in the axial direction. Along the axial direction of the rotor (1), the second fan blade (62) is connected to the axial end of the second mounting part (61) away from the main rotor baffle (5), and the second fan blade (62) extends together in the axial direction away from the second mounting part (61) and in the radially outward direction.

2. The motor assembly of the compressor according to claim 1, characterized in that: The first fan blade (32) includes a first windward surface (321) relatively close to the auxiliary rotor baffle (2) and a first leeward surface (322) relatively far from the auxiliary rotor baffle (2). The first windward surface (321) is a plane or an arc surface. When the first windward surface (321) is a plane, the plane intersects the axial end face of the auxiliary rotor baffle (2) at an inclination angle ∠A. When the first windward surface (321) is an arc surface, the tangent at any point on the arc surface intersects the axial end face of the auxiliary rotor baffle (2) at an inclination angle ∠A'.

3. The motor assembly of the compressor according to claim 2, characterized in that: When the first windward surface (321) is a plane, and the plane intersects the axial end face of the auxiliary rotor baffle (2) at an inclination angle ∠A, ∠A∈[0°,45°]; when the first windward surface (321) is an arc surface, and the tangent at any point on the arc surface intersects the axial end face of the auxiliary rotor baffle (2) at an inclination angle ∠A', ∠A'∈[0°,45°].

4. The motor assembly of the compressor according to claim 2, characterized in that: The first fan blade (32) further includes a first windward end and a first leeward end. The first windward end connects the first windward surface (321) and the first leeward surface (322) to form the first leading edge (323) of the first fan blade (32). In a first fan blade, the first leading edge is the first to come into contact with the airflow. The first leeward end connects the first windward surface (321) and the first leeward surface (322) to form the first trailing edge (324) of the first fan blade (32). In a first fan blade, the first trailing edge (324) is the last to come into contact with the airflow.

5. The motor assembly of the compressor according to claim 4, characterized in that: The inner fan blade (3) has at least two, and at least two first mounting portions (31) are arranged circumferentially spaced along the rotor (1). The first fan blades (32) of the at least two inner fan blades extend radially inward. Among two adjacent inner fan blades, and in the projection plane of the axial end face, at least a portion of the first trailing edge (324) of the first fan blade (32) of the inner fan blade located upstream in the airflow direction is covered by the first leading edge (323) of the first fan blade (32) of the inner fan blade located downstream.

6. The motor assembly of the compressor according to claim 5, characterized in that: It also includes a secondary balance block (71), which is disposed on the secondary rotor baffle (2) and is located between two adjacent first mounting parts (31). The first fan blade (32) does not contact the secondary balance block (71).

7. The motor assembly of the compressor according to any one of claims 1-6, characterized in that: The first mounting part (31) is a column structure with a first mounting hole (311) on it. The motor assembly also includes a first fastener (41). The first fastener (41) passes through the first mounting hole (311) to install the first mounting part (31) and the auxiliary rotor baffle (2) onto the rotor (1) as a whole.

8. The motor assembly of the compressor according to claim 7, characterized in that: The first mounting part (31) is a cuboid column, and one of its axial end faces is fitted to the auxiliary rotor baffle (2). The other axial end face of the first mounting part (31) is parallel to one of its axial end faces. The first mounting hole (311) extends from one axial end face of the first mounting part (31) to its other axial end face.

9. The motor assembly of the compressor according to claim 1, characterized in that: The second fan blade (62) includes a second leeward surface (622) relatively close to the second mounting part (61) and a second windward surface (621) relatively far from the second mounting part (61). The second windward surface (621) is a plane or an arc surface. When the second windward surface (621) is a plane, the second windward surface intersects the axial end face of the main rotor baffle (5) at an inclination angle ∠B between them. When the second windward surface (621) is an arc surface, the tangent at any point on the second windward surface intersects the axial end face of the main rotor baffle (5) at an inclination angle ∠B' between them.

10. The motor assembly of the compressor according to claim 9, characterized in that: When the second windward surface (621) is a plane, and the second windward surface intersects the axial end face of the main rotor baffle (5) at an inclination angle ∠B, ∠B∈[0°,45°]; when the second windward surface (621) is an arc surface, and the tangent at any point on the second windward surface intersects the axial end face of the main rotor baffle (5) at an inclination angle ∠B', ∠B'∈[0°,45°].

11. The motor assembly of the compressor according to claim 9, characterized in that: The second fan blade (62) further includes a second windward end and a second leeward end. The second windward end connects the second windward surface (621) and the second leeward surface (622) to form the second leading edge (623) of the second fan blade (62). In a second fan blade, the second leading edge (623) is the first to come into contact with the airflow. The second leeward end connects the second windward surface and the second leeward surface to form the second trailing edge (624) of the second fan blade (62). In a second fan blade, the second trailing edge (624) is the last to come into contact with the airflow.

12. The motor assembly of the compressor according to claim 11, characterized in that: The second leading edge (623) is a surface located radially outside the second mounting part (61). The second leading edge (623) includes a leading edge plane and a leading edge arc surface. The arc radius of the leading edge arc surface is R5. The second trailing edge (624) is a surface located radially outside the second mounting part (61). It includes a trailing edge plane and a trailing edge arc surface. The arc radius of the trailing edge arc surface is R6, and R6≥R5. Alternatively, the second leading edge (623) is a surface located radially outside the second mounting portion (61), the second leading edge only includes a leading edge arc surface, the arc radius of the leading edge arc surface is R5, and the second trailing edge (624) is a surface located radially outside the second mounting portion (61), it only includes a trailing edge arc surface, the arc radius of the trailing edge arc surface is R6, and R6≥R5.

13. The motor assembly of the compressor according to claim 11, characterized in that: The second blade (62) further includes a starting edge (625) and a ending edge (626) located radially inside the second mounting portion (61). The starting edge (625) is connected to the second leading edge (623), and the ending edge (626) is connected to the second trailing edge (624). Both the starting edge (625) and the ending edge (626) are planar structures, and the included angle between the two right angles is ∠C, where ∠C∈[0°, 60°].

14. The motor assembly of the compressor according to claim 13, characterized in that: The second fan blade (62) also includes an outer fan blade arc portion (627) located radially inside the second mounting portion (61). The outer fan blade arc portion (627) is connected between the starting edge (625) and the ending edge (626), and the outer fan blade arc portion (627) is an arc surface structure with an arc surface radius of R4. The motor assembly also includes a crankshaft (8). The outer circumferential radius of the crankshaft relative to the outer fan blade arc portion (627) is R3, and R4 > R3.

15. The motor assembly of the compressor according to claim 11, characterized in that: The outer fan blade (6) has at least two, and at least two second mounting portions (61) are arranged circumferentially spaced along the rotor (1). The second fan blades (62) of the at least two outer fan blades extend axially. Among two adjacent outer fan blades, and in the axial end face projection plane, at least part of the second trailing edge (624) of the second fan blade of the outer fan blade located upstream in the airflow direction covers the second leading edge (623) of the second fan blade of the outer fan blade located downstream. The area covered is (0-10%) of the area of ​​the second fan blade (62) in the axial end face projection plane.

16. The motor assembly of the compressor according to claim 15, characterized in that: It also includes a main balancing block (72), which is disposed on the main rotor baffle (5) and is located on the radially outer side of the second mounting part (61). Along the axial direction, the main balancing block (72) is located between the second fan blade (62) and the main rotor baffle (5), and the second fan blade (62) does not contact the main balancing block (72).

17. The motor assembly of the compressor according to claim 1, characterized in that: The second mounting part (61) is a column structure with a second mounting hole (611) on it. The motor assembly also includes a second fastener (42). The second fastener (42) passes through the second mounting hole (611) to install the second mounting part (61) and the main rotor baffle (5) onto the rotor (1) as a whole.

18. The motor assembly of the compressor according to claim 17, characterized in that: The second mounting part (61) is a cuboid column, with one axial end face of the second mounting part (61) fitting against the main rotor baffle (5). The other axial end face of the second mounting part (61) is parallel to one axial end face of the second mounting part (61). The second mounting hole (611) extends from one axial end face of the second mounting part (61) to the other axial end face.

19. A compressor, characterized in that: The motor assembly of the compressor included in any one of claims 1-18 further includes a housing (9), the motor assembly being disposed inside the housing (9), the housing (9) being a connected housing or a non-connected housing.

20. The compressor according to claim 19, characterized in that: When the housing (9) is a connected housing, both of its axial ends are open ends. The inner fan blade (3) is located at one axial end of the rotor (1), and the outer fan blade (6) is located at the other axial end of the rotor (1). When the housing (9) is a non-connected housing, one axial end is an open end and the other axial end is a closed end. The inner fan blade (3) is located at one axial end of the rotor (1) facing the closed end, and the outer fan blade (6) is located at one axial end of the rotor (1) facing the open end.

21. The compressor according to claim 20, characterized in that: It also includes a terminal assembly (10) and a stator (11), the stator (11) being located on the radial outer periphery of the rotor (1) and connected to the housing (9), the stator (11) being electrically connected to the terminal assembly (10) via stator leads (12). The housing (9) includes a housing middle part (91) and a housing tail part (92). The housing middle part (91) corresponds to one axial end of the rotor (1), and the housing tail part (92) corresponds to the other axial end of the rotor (1). When the housing (9) is a connected housing, the outer fan blade (6) is disposed at one axial end of the rotor (1) which is opposite to the middle part (91) of the housing, or at one axial end of the rotor (1) which is opposite to the tail part (92) of the housing; when the housing (9) is a non-connected housing, the outer fan blade (6) is disposed at one axial end of the rotor (1) which is opposite to the middle part (91) of the housing.

22. The compressor according to claim 21, characterized in that: When an outer fan blade is provided at one axial end of the rotor (1) which is positioned opposite to the middle part (91) of the housing, twice the distance between the stator lead (12) and the center hole of the rotor (1) is D2, the inner diameter of the middle part (91) of the housing is D3, and twice the distance between the outermost radial end of the outer fan blade (6) which is positioned opposite to the middle part (91) of the housing and the center hole of the rotor (1) is D1. When the housing (9) is a connected housing or a non-connected housing, and the terminal assembly (10) is located in the middle (91) of the housing, D1 < D2 < D3; When the housing (9) is a connected housing or a non-connected housing, and the terminal assembly (10) is located at the tail (92) of the housing, D1 < D3; When the housing (9) is a connected housing and the terminal assembly (10) is located in the middle of the housing, D1 < D2 < D3; When the housing (9) is a connected housing and the terminal assembly (10) is located at the tail of the housing, D1 < D3.

23. The compressor according to claim 21, characterized in that: When an outer fan blade is provided at one axial end of the rotor (1) which is located opposite to the tail of the housing, twice the distance between the stator lead (12) and the center hole of the rotor (1) is D2, the inner diameter of the tail of the housing (92) is D33, and twice the distance between the outermost radial end of the outer fan blade (6) which is located opposite to the tail of the housing (92) and the center hole of the rotor (1) is D11. When the housing (9) is a connected housing and the terminal assembly (10) is located in the middle of the housing, D11 < D33; When the housing (9) is a connected housing and the terminal assembly (10) is located at the tail of the housing, D11 < D2 < D33.

24. An air conditioner, characterized in that: The compressor included in any one of claims 19-23.

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