Motor, air conditioner

Abstract

The present invention provides a motor and an air conditioner. The motor includes a housing and a stator assembly. A first thread is formed on the inner wall of the housing, and the stator assembly has a second thread. The stator assembly is detachably connected to the housing through the first thread and the second thread. According to the present invention, the stator assembly and the housing are detachably connected by means of a threaded connection. When an abnormality occurs in the stator assembly, the two can be easily disassembled and the stator assembly can be taken out of the housing, which is convenient for problem troubleshooting or replacing a new housing or stator assembly, effectively overcoming the deficiency in the prior art that the two are connected by an interference fit, resulting in difficulty in disassembling the stator assembly from the housing or even causing both to be scrapped at the same time, avoiding waste of non-abnormal components and reducing the maintenance cost of the motor.

Description

Technical Field

[0001] The present invention belongs to the technical field of motor manufacturing, and particularly relates to a motor and an air conditioner. Background Art

[0002] Generally speaking, a motor mainly consists of several major components such as a stator, a rotor, a housing, front and rear end covers, and bearings. The end covers are mainly used to support the motor rotor, and the housing is used to install the stator. Conventionally, an interference fit is used between the housing and the stator. During installation, the housing needs to be heated first. After the inner diameter of the housing expands sufficiently, the stator can be installed. Although this method is convenient, it has a drawback, that is, if the stator malfunctions, it is very difficult to remove the stator from the housing, and ultimately the housing will also have to be scrapped. On the other hand, in order to cool the stator core of the motor, cooling medium flow channels are usually opened inside the housing. Such flow channels are extremely difficult to obtain by machining and can only be achieved by mold opening, which will also inevitably increase the total cost of the motor. Summary of the Invention

[0003] Therefore, the present invention provides a motor and an air conditioner, which can overcome the deficiency that when the stator assembly is connected to the outer housing by an interference fit and the stator assembly needs to be maintained due to an abnormality, it is difficult to disassemble the stator assembly from the outer housing, and even may lead to the simultaneous scrapping of both.

[0004] To solve the above problems, the present invention provides a motor, including an outer housing and a stator assembly. A first thread is formed on the inner wall of the outer housing, and the stator assembly has a second thread. The stator assembly is detachably connected to the inside of the outer housing through the first thread and the second thread.

[0005] In some embodiments, the stator assembly includes a stator core and a connection sleeve sleeved on its outer circumference. The second thread is formed on the outer circumferential wall of the connection sleeve.

[0006] In some embodiments, a plurality of first grooves extending along the axial direction of the outer housing are formed on the inner wall of the outer housing, and the openings of the first grooves face the side of the stator assembly.

[0007] In some embodiments, a plurality of second grooves extending along the axial direction of the connection sleeve are formed on the outer circumferential wall of the connection sleeve. When the first thread and the second thread are screwed together to a preset position, the plurality of first grooves and the plurality of second grooves respectively axially penetrate through the outer housing to jointly form a plurality of cooling channels.

[0008] In some embodiments, the plurality of first grooves are evenly spaced along the circumferential direction of the outer housing.

[0009] In some embodiments, in the thread extension direction of the first thread, the sum of the lengths of the plurality of first grooves is La, and the sum of the lengths of the thread teeth of the first thread is Lb, where 0.2Lb ≤ La ≤

[0010] 0.25Lb.

[0011] In some embodiments, the first thread extends from the first end face of the outer housing to the second end face.

[0012] In some embodiments, the motor further includes a first end cover connected to the first end face. The first end cover has a first annular edge. There is a sealed connection between one side of the first annular edge facing the first end face and the first end of the connection sleeve. There is a gap between the outer circumferential wall of the first annular edge and the inner wall of the outer housing; and / or, the motor further includes a second end cover connected to the second end face. The second end cover has a second annular edge. There is a sealed connection between one side of the second annular edge facing the second end face and the second end of the connection sleeve. There is a gap between the outer circumferential wall of the second annular edge and the inner wall of the outer housing.

[0013] In some embodiments, there is an interference fit between the stator core and the connection sleeve.

[0014] The present invention also provides an air conditioner including the above-mentioned motor.

[0015] For a motor and an air conditioner provided by the present invention, a detachable connection is achieved between the stator assembly and the outer housing by means of a threaded connection. When an abnormality occurs in the stator assembly, the two can be easily disassembled to take out the stator assembly from the outer housing, which is convenient for problem troubleshooting or replacing a new outer housing or stator assembly, effectively overcoming the deficiency in the prior art that the two are connected by an interference fit, resulting in difficulty in disassembling the stator assembly from the outer housing or even causing both to be scrapped simultaneously, avoiding waste of non-abnormal components and reducing the maintenance cost of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic internal structure diagram of the motor according to an embodiment of the present invention;

[0017] Figure 2 is a cross-section of the motor according to an embodiment of the present invention;

[0018] Figure 3 is Figure 1 a three-dimensional structure diagram of the outer housing in

[0019] Figure 4 is Figure 1 a three-dimensional structure diagram of the connection sleeve in

[0020] The reference numerals are shown as:

[0021] 1. Outer housing; 11. First thread; 12. First groove; 2. Stator assembly; 21. Stator core; 3. Connecting sleeve; 31. Second thread; 32. Second groove; 4. Cooling channel; 51. First end cover; 511. First annular flange; 52. Second end cover; 521. Second annular flange. Detailed implementation mode

[0022] Referring to Figures 1 to 4 As shown, according to an embodiment of the present invention, a motor is provided, including an outer housing 1 and a stator assembly 2. A first thread 11 is formed on the inner wall of the outer housing 1, and the stator assembly 2 has a second thread 31. The stator assembly 2 is detachably connected to the inside of the outer housing 1 through the first thread 11 and the second thread 31. In this technical solution, the stator assembly 2 and the outer housing 1 are detachably connected by means of a threaded connection. When an abnormality occurs in the stator assembly 2, the two can be easily disassembled to take out the stator assembly 2 from the outer housing 1, which is convenient for problem troubleshooting or replacing the new outer housing 1 or stator assembly 2, effectively overcoming the deficiency in the prior art that the two are connected by an interference fit, resulting in difficulty in disassembling the stator assembly from the outer housing or even causing both to be scrapped at the same time, avoiding the waste of non-abnormal components and reducing the maintenance cost of the motor.

[0023] The stator assembly 2 includes a stator core 21. As a feasible implementation method, the second thread 31 can be formed on the outer circumferential wall of the stator core 21 to realize the detachable connection between the stator core 21 and the outer housing 1 by screwing with the first thread 11. Since the current stator core 21 is mostly formed by stacking silicon steel sheets during specific manufacturing, the process difficulty of forming the second thread 31 on its outer circumferential surface is relatively high. At the same time, the formation of these thread grooves will have an adverse impact on the magnetic field inside the stator core 21. Therefore, preferably, the stator assembly 2 further includes a connecting sleeve 3 sleeved on the outer circumference of the stator core 21. At this time, the second thread 31 is formed on the outer circumferential wall of the connecting sleeve 3. Forming the second thread 31 on the connecting sleeve 3 can reduce the processing difficulty of the second thread 31. At the same time, the performance of the motor can be improved by making the connecting sleeve 3 of a non-magnetic conductive material.

[0024] In some embodiments, a plurality of first grooves 12 extending along its axial direction are formed on the inner wall of the outer housing 1, and the openings of the first grooves 12 face the stator assembly 2. After the outer housing 1 is threadedly connected to the connecting sleeve 3, the first grooves 12 extending along the axial direction of the outer housing 1 form the housing cooling channel of the motor, which can cool the stator core 21. It can be understood that the first grooves 12 will divide the first thread 11 into multiple thread segments. Preferably, the groove depth of the first groove 12 is consistent with the tooth height of the thread of the first thread 11, so as to ensure the reduction of the thickness design of the outer housing 1.

[0025] In some embodiments, a plurality of second grooves 32 extending along its axial direction are formed on the outer circumferential wall of the connecting sleeve 3. When the first thread 11 and the second thread 31 are screwed together to a preset position, the plurality of first grooves 12 and the plurality of second grooves 32 respectively penetrate axially along the outer housing 1 to jointly form a plurality of cooling channels 4. Similar to the first groove 12, the groove depth of the first groove 12 is consistent with the tooth height of the thread of the second thread 31. The cooling channels 4 formed by the screwing of the first thread 11 and the second thread 31 are respectively formed on the open surfaces of the corresponding components, without the need to form an outer housing with cooling channels by injection molding as in the prior art, saving the manufacturing cost of the motor. Preferably, the plurality of first grooves 12 are evenly spaced along the circumferential direction of the outer housing 1 to form a circumferentially uniform cooling for the motor.

[0026] It can be understood that the bottoms of the above-mentioned first grooves 12 and second grooves 32 are the circular surface of the inner wall surface of the outer housing 1 and the outer circumferential surface of the connecting sleeve 3 respectively. In the thread extension direction of the first thread 11, the sum of the lengths of the plurality of first grooves 12 is La, and the sum of the lengths of the threads of the first thread 11 is Lb, 0.2Lb ≤ La ≤ 0.25Lb, to ensure the smoothness of the screwing process of the first thread 11 and the second thread 31 and the position reliability after screwing. It can be understood that the length limitation of the second groove 32 is the same as that of the first groove 12, which will not be elaborated here.

[0027] In some embodiments, the axial length of the connecting sleeve 3 may be less than the axial length of the outer housing 1, so as to form a communication space within the outer housing 1 near the first end face and the second end face of the outer housing 1. At this time, a cooling medium such as a refrigerant can enter the motor interior through the cooling channel 4 and contact and cool the stator core 21, the windings thereon, and the rotor, etc. However, this method is only applicable to cooling media that will not cause adverse effects on internal components. When the cooling medium is water, it is not appropriate to allow contact between the cooling channel 4 and the internal components at this time. At this time, preferably, the first thread 11 extends from the first end face to the second end face of the outer housing 1. Correspondingly, the motor further includes a first end cover 51 connected to the first end face, and the motor further includes a second end cover 52 connected to the second end face and capable of being hermetically connected to the first end and the second end of the connecting sleeve 3 respectively, so as to enclose the cooling channel 4 on the outer peripheral side of the connecting sleeve 3. Further, the first end cover 51 has a first annular edge 511, and there is a hermetic connection between the side of the first annular edge 511 facing the first end face and the first end of the connecting sleeve 3, and there is a gap between the outer circumferential wall of the first annular edge 511 and the inner wall of the outer housing 1; and / or, the second end cover 52 has a second annular edge 521, and there is a hermetic connection between the side of the second annular edge 521 facing the second end face and the second end of the connecting sleeve 3, and there is a gap between the outer circumferential wall of the second annular edge 521 and the inner wall of the outer housing 1, so as to be able to cool the end covers. Preferably, the gap can be drained to the bearing holes respectively provided on the first end cover 51 and the second end cover 52 through a drainage channel, so as to be able to effectively cool the bearings at the corresponding bearing holes.

[0028] In some embodiments, there is an interference fit between the stator core 21 and the connecting sleeve 3. During specific assembly, first, the stator core 21 and the connecting sleeve 3 are connected by hot shrinking with an interference fit, and then the two are screwed together with the outer housing 1 as a whole.

[0029] According to an embodiment of the present invention, there is also provided an air conditioner including the above-mentioned motor.

[0030] It is easy for those skilled in the art to understand that, on the premise of no conflict, the above-mentioned advantageous ways can be freely combined and superimposed.

[0031] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention. The above is only the preferred implementation manner of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and variations can still be made, and these improvements and variations should also be regarded as within the protection scope of the present invention.

Claims

1. A motor, characterized in that, It includes a housing (1) and a stator assembly (2). A first thread (11) is formed on the inner wall of the housing (1). The stator assembly (2) has a second thread (31). The stator assembly (2) is detachably connected to the inside of the housing (1) through the first thread (11) and the second thread (31). The stator assembly (2) includes a stator core (21) and a connecting sleeve (3) sleeved on its outer circumference. The second thread (31) is formed on the outer circumferential wall of the connecting sleeve (3). A plurality of first grooves (12) extending along its axial direction are formed on the inner wall of the housing (1). The openings of the first grooves (12) face the side of the stator assembly (2). A plurality of second grooves (32) extending along its axial direction are formed on the outer circumferential wall of the connecting sleeve (3). When the first thread (11) and the second thread (31) are screwed together to a preset position, the plurality of first grooves (12) and the plurality of second grooves (32) respectively penetrate axially along the housing (1) to jointly form a plurality of cooling channels (4).

2. The motor according to claim 1, characterized in that, The plurality of first grooves (12) are evenly spaced along the circumferential direction of the housing (1).

3. The motor according to claim 1, characterized in that, In the thread extension direction of the first thread (11), the sum of the lengths of the plurality of first grooves (12) is La, and the sum of the lengths of the thread teeth of the first thread (11) is Lb, where 0.2Lb ≤ La ≤ 0.25Lb.

4. The motor according to claim 1, characterized in that, The first thread (11) extends from the first end face to the second end face of the housing (1).

5. The motor according to claim 4, characterized in that, It further includes a first end cover (51) connected to the first end face. The first end cover (51) has a first rim (511). The side of the first rim (511) facing the first end face is hermetically connected to the first end of the connecting sleeve (3). There is a gap between the outer circumferential wall of the first rim (511) and the inner wall of the housing (1); and / or, it further includes a second end cover (52) connected to the second end face. The second end cover (52) has a second rim (521). The side of the second rim (521) facing the second end face is hermetically connected to the second end of the connecting sleeve (3). There is a gap between the outer circumferential wall of the second rim (521) and the inner wall of the housing (1).

6. The motor according to claim 1, characterized in that An interference fit is provided between the stator core (21) and the connecting sleeve (3).

7. An air conditioner, comprising a motor, characterized in that, The motor is the motor according to any one of claims 1 to 6.

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