Motors, compressors and refrigeration equipment

Abstract

This invention discloses an electric motor, a compressor, and a refrigeration device, relating to the field of permanent magnet motor technology. The stator core has alternating stator teeth and slots on its inner circumference. The windings are located within the stator slots, with a number of slots Q. The diameter of the largest outer circle of the stator core is D1, the diameter of the largest circle formed by the bottoms of multiple stator slots is D2, and the diameter of the smallest inner circle of the stator core is D3. The rotor is rotatably mounted within the stator, and the number of pole pairs of the rotor is P. The following conditions are satisfied: 1.4 ≤ (GCD(Q,P)×(D1-D2)÷2) / ((D1-D3)÷2)≤2.6 and 0.3 ≤ ((D2-D3)÷2) / (D3÷2)≤0.42, where GCD(Q,P) is the greatest common divisor of Q and P. The technical solution provided by this invention aims to balance stator rigidity and temperature, ensuring low-noise operation of the motor while also guaranteeing its operational reliability.

Description

Technical Field

[0001] This invention relates to the field of permanent magnet motor technology, and particularly to a motor, compressor, and refrigeration equipment. Background Technology

[0002] As a crucial device for converting electrical energy into mechanical energy, the electric motor plays a key role in refrigeration equipment with compressors, such as refrigerators and air conditioners. In related technologies, increasing the area of ​​the stator slots can reduce heat generation and improve motor heat dissipation. However, excessively large stator slot areas can easily reduce the structural strength of the stator core, leading to worsened motor vibration and making it difficult to meet the quiet operation requirements of both the motor and the compressor. Summary of the Invention

[0003] The main objective of this invention is to provide an electric motor, compressor, and refrigeration equipment that balances stator rigidity and temperature, ensuring low-noise operation of the motor while also guaranteeing its operational reliability.

[0004] To achieve the above objectives, the present invention proposes an electric motor comprising a stator and a rotor. The stator comprises a stator core and windings. The stator core comprises a stator yoke and a plurality of stator teeth spaced apart along the inner circumference of the stator yoke. Two adjacent stator teeth and the stator yoke enclose a stator slot. The windings are disposed in the stator slots. The number of stator slots is Q. The diameter of the largest outer circle of the stator core is D1. The diameter of the largest circle formed by the bottoms of the plurality of stator slots is D2. The diameter of the smallest inner circle of the stator core is D3. The rotor is rotatably mounted within the stator, and the number of pole pairs of the rotor is P.

[0005] Simultaneously satisfy: and Where GCD(Q,P) is the greatest common divisor of Q and P, and the units of D1, D2, and D3 are mm.

[0006] In one implementation, .

[0007] In one implementation, .

[0008] In one implementation, .

[0009] In one implementation, , , The number of slots per pole per phase of the motor is q, and the number of phases of the motor is m. Let q = Q / 2mP, satisfying: .

[0010] In one implementation, , .

[0011] The present invention also proposes a compressor comprising a motor as described above, wherein the compressor is configured as a rotary compressor.

[0012] In one embodiment, the compressor further includes a pump body and a housing. The housing includes a main housing and a first housing and a second housing located at opposite ends of the main housing. The motor is located inside the main housing. The outer periphery of the stator core is fixed to the inner periphery of the main housing. The axial length of the main housing in the compressor is h, and the thickness of the main housing is t, where h and t are in mm. The following conditions are met: .

[0013] In one implementation, .

[0014] The present invention also proposes a refrigeration device, which includes a compressor as described above.

[0015] The technical solution of this invention forms a formula by taking the ratio of the thickness of the stator yoke in the radial direction of the stator core to the annular width of the stator core, and multiplying it by the greatest common divisor of the number of stator slots Q and the number of rotor pole pairs P. The value is limited to between 1.4 and 2.6 to ensure that the ratio of the stator yoke thickness to the stator core ring width is within a reasonable range, thereby ensuring the stiffness of the stator core. This not only effectively suppresses motor vibration and reduces noise caused by motor vibration, but also ensures that the area ratio of the stator slots is within a reasonable range, resulting in a more reasonable number of windings and reducing the probability of the motor overheating. Thus, The ratio between 1.4 and 2.6 balances the stator rigidity and temperature, thus ensuring the reliability of the motor operation. At the same time, the greatest common divisor of the stator slot number Q and the rotor pole pair number P is within a reasonable range, reducing the vibration of the excitation source generated by the motor, thereby reducing the vibration noise caused by the motor.

[0016] Furthermore, the ratio between the radial thickness of the stator slot and the inner diameter D3 of the stator core is used to form the formula. The depth is limited to between 0.3 and 0.42 to ensure that the ratio of the radial depth of the stator slot to the inner radius of the stator core is within a reasonable range. This ensures the rigidity of the stator core, suppresses the vibration amplitude of the stator core, and reduces noise caused by motor vibration. Simultaneously, it avoids insufficient winding, reducing the probability of the motor overheating. Thus, The temperature range of 0.3 to 0.42 effectively balances the stiffness and temperature of the stator, thereby ensuring the reliability of the motor operation. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the structure of an embodiment of the motor provided by the present invention;

[0019] Figure 2 for Figure 1 Schematic diagram of the middle stator core;

[0020] Figure 3 A schematic diagram of another embodiment of the stator core of the motor provided by the present invention;

[0021] Figure 4 This is a schematic diagram of the structure of an embodiment of the compressor provided by the present invention;

[0022] Figure 5 A graph showing the relationship between noise and temperature during operation in a compressor according to an embodiment of the motor provided by the present invention;

[0023] Figure 6 A diagram showing the relationship between vibration and temperature during operation in a compressor, according to an embodiment of the motor provided by the present invention.

[0024] Figure 7 A diagram showing the relationship between vibration and temperature during operation of a compressor embodiment provided by the present invention.

[0025] Explanation of icon numbers:

[0026] 100. Stator; 110. Stator core; 111. Stator yoke; 112. Stator teeth; 113. Stator slot; 200. Rotor; 300. Pump body; 310. Crankshaft; 400. Housing; 410. First housing; 420. Second housing; 430. Main housing.

[0027] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0029] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0030] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0031] It should be noted that during motor operation, the stator core 110 needs to withstand various complex loads such as electromagnetic force, thermal stress, and mechanical vibration. The structural rigidity of the stator core 110 directly affects its resistance to deformation and vibration suppression capabilities, while the relationship between parameters such as the area of ​​the stator slot 113, the radial thickness of the stator yoke 111, the annular width of the stator core 110, and the inner diameter of the stator core 110 affects the heat dissipation path and thermal resistance of the windings, thereby affecting the temperature level of the motor.

[0032] This invention proposes an electric motor. Please refer to... Figure 1 , Figures 4 to 6 In one embodiment of the present invention, the motor includes a stator 100 and a rotor 200. The stator 100 includes a stator core 110 and windings. The stator core 110 includes a stator yoke 111 and a plurality of stator teeth 112 spaced along the inner circumference of the stator yoke 111. Two adjacent stator teeth 112 and the stator yoke 111 enclose a stator slot 113. The windings are disposed in the stator slot 113. The number of stator slots 113 is Q. The diameter of the largest outer circle of the stator core 110 is D1. The diameter of the largest circle formed by the bottoms of the plurality of stator slots 113 is D2. The diameter of the smallest inner circle of the stator core 110 is D3. The rotor 200 is rotatably mounted in the stator 100. The number of pole pairs of the rotor 200 is P.

[0033] Simultaneously satisfy: and Where GCD(Q,P) is the greatest common divisor of Q and P, and the units of D1, D2, and D3 are mm.

[0034] The technical solution of this invention forms a formula by taking the ratio of the thickness of the stator yoke 111 in the radial direction of the stator core 110 to the annular width of the stator core 110, and multiplying it by the greatest common divisor of the number of stator slots 113 Q and the number of pole pairs P of the rotor 200. The value is limited to between 1.4 and 2.6 to ensure that the ratio of the stator yoke 111 thickness to the ring width of the stator core 110 is within a reasonable range, thereby ensuring the rigidity of the stator core 110. This not only effectively suppresses motor vibration and reduces noise caused by motor vibration, but also ensures that the area ratio of the stator slots 113 is within a reasonable range, resulting in a more reasonable number of windings and reducing the probability of the motor overheating. Thus, The ratio between 1.4 and 2.6 balances the rigidity and temperature of the stator 100, thus ensuring the reliability of the motor operation. At the same time, the greatest common divisor of the number of stator slots 113 Q and the number of rotor pole pairs P is within a reasonable range, reducing the vibration of the excitation source generated by the motor, thereby reducing the vibration noise caused by the motor.

[0035] Furthermore, the ratio between the radial thickness of the stator slot 113 and the inner diameter D3 of the stator core 110 is used to form the formula. The depth of the stator slot 113 along the radial direction is limited to between 0.3 and 0.42 to ensure that the ratio of the radial depth of the stator slot 113 to the inner radius of the stator core 110 is within a reasonable range. This ensures the rigidity of the stator core 110, suppresses the vibration amplitude of the stator core 110, and reduces noise caused by motor vibration. Simultaneously, it avoids insufficient winding, reducing the probability of the motor overheating. Thus, The temperature range of 0.3 to 0.42 effectively balances the rigidity and temperature of the stator 100, thereby ensuring the reliability of the motor operation.

[0036] It should be noted that GCD(Q,P) reflects the degree of periodic matching of the magnetic circuit between stator 100 and rotor 200. A larger GCD(Q,P) value indicates a shorter repetition period of the magnetic circuit between stator 100 and rotor 200, a more uniform distribution of electromagnetic excitation, and a smaller radial electromagnetic force. This helps to reduce local magnetic flux density and hysteresis loss, and decrease excitation source vibration, thereby reducing iron loss and vibration noise. It is understandable that the thickness of the stator yoke 111 of the stator core 110... The larger the diameter, the greater the rigidity of the stator core 110. However, given a fixed thickness of the stator yoke 111, the ring width of the stator core 110 depends on the ratio of the stator yoke 111 to the stator core 110. The larger the value, the greater the radial depth of the stator slot 113, and the more the rigidity of the stator 100 is reduced. Simultaneously, and The ratio is within a reasonable range, ensuring the rigidity of the stator core 110 while the stator slot 113 has sufficient slot area to accommodate the windings. Combined with a motor design that minimizes excitation source vibration, a high-rigidity, low-excitation motor can be formed.

[0037] Among them, such as Figure 5 As shown, the motor is installed in the compressor, and the compressor is used as the measuring object. When the compressor is running, it can be seen that... In the changes of the value, The larger the value of , the better the rigidity of the stator core 110 of the motor. However, due to the reduced area ratio of the stator slots 113, the amount of windings used also decreases accordingly, leading to an increase in electrical load and causing reliability problems such as overheating and insulation failure in the motor. Figure 5 As shown, When the value is 1.2, the compressor noise is 79dB and the operating temperature is 91.5℃; When the value is 1.4, the compressor noise is 77.5dB and the operating temperature is 92.5℃; When the value is 1.5, the compressor noise is 76.5dB and the operating temperature is 94℃; When the value is 1.6, the compressor noise is 75.5dB and the operating temperature is 95℃; When the value is 1.8, the compressor noise is 74dB and the operating temperature is 95.5℃; When the value is 2.0, the compressor noise is 73dB and the operating temperature is 97℃; When the value is 2.2, the compressor noise is 72.5dB and the operating temperature is 98℃; When the value is 2.4, the compressor noise is 72dB and the operating temperature is 100℃; When the value is 2.6, the compressor noise is 71.5dB and the operating temperature is 102℃; When the value is 2.8, the compressor noise is 70.8dB and the operating temperature is 104℃.

[0038] It can be seen that when When the value is less than 1.4, the ratio of the thickness of the stator yoke 111 to the overall area of ​​the stator core 110 decreases, the rigidity of the stator 100 decreases, the compressor vibration worsens, and consequently, the overall noise of the compressor is affected; when When the value is greater than 2.6, although the rigidity of the stator core 110 is significantly improved, the proportion of the stator slot 113 area to the stator core 110 decreases, resulting in a smaller winding amount. Consequently, the electrical load falls within a larger range, leading to overheating and insulation failure in the motor. Therefore, this limitation... Between 1.4 and 2.6, the motor is installed after the compressor, the compressor noise is between 71.5dB and 77.5dB, and the compressor operating temperature is between 92.5℃ and 102℃, which can better balance the rigidity and temperature of the motor stator 100.

[0039] Furthermore, in this embodiment, as Figure 5 As shown, When the value is 1.5, the compressor noise is 76.5dB and the operating temperature is 94℃; When the value is 1.6, the compressor noise is 75.5dB and the operating temperature is 95℃; When the value is 1.8, the compressor noise is 74dB and the operating temperature is 95.5℃; When the value is 2.0, the compressor noise is 73dB and the operating temperature is 97℃; When the value is 2.4, the compressor noise is 72dB and the operating temperature is 100℃. Therefore, the limit... Between 1.5 and 2.4, the motor is installed after the compressor, the compressor noise is between 72dB and 76.5dB, and the compressor operating temperature is between 94℃ and 100℃, which can better balance the rigidity of the motor stator 100 and the temperature of the stator 100.

[0040] Specifically, The possible values ​​are 1.4, 1.5, 1.6, 1.8, 2.0, 2.1, 2.2, 2.3, 2.4, 2.5, or 2.6.

[0041] Regarding the relationship between the inner diameter of the stator core 110 and the radial depth of the stator slot 113, as follows: Figure 6 As shown, with a fixed thickness of the stator yoke 111, the smaller the inner diameter D3 of the stator core 110, the larger the radial length of the stator teeth 112, and the smaller the rigidity of the stator core 110, resulting in a larger vibration amplitude of the stator core 110; combined with the depth dimension of the stator slot 113... The larger the core, the larger the proportion of the stator slot 113 area in the stator core 110, and the larger the hollow area of ​​the stator core 110, resulting in more severe vibration and noise degradation during motor operation. For example, Figure 6 As shown, the motor is installed in the compressor, and the compressor is used as the measuring object. When the compressor is running, it can be seen that... In the changes of the value, The smaller the value of , the better the rigidity of the stator core 110 of the motor. However, due to the reduced area ratio of the stator slot 113, the amount of winding is also reduced accordingly, and the electrical load increases, leading to reliability problems such as overheating and insulation failure of the motor.

[0042] like Figure 6 As shown, When the value is 0.20, the compressor vibration is 1.05 m / s. -2 The operating temperature is 119℃; When the value is 0.25, the compressor vibration is 1.35 m / s. -2 The operating temperature is 110℃; When the value is 0.30, the compressor vibration is 1.6 m / s. -2 The operating temperature is 107℃; When the value is 0.34, the compressor vibration is 1.8 m / s. -2 The operating temperature is 101℃; When the value is 0.38, the compressor vibration is 2.0 m / s. -2 The operating temperature is 96℃; When the value is 0.42, the compressor vibration is 2.2 m / s. -2 The operating temperature is 93℃; When the value is 0.50, the compressor vibration is 2.9 m / s. -2 The operating temperature is 90.5℃;

[0043] It can be seen that when When the value is less than 0.30, the inner diameter of stator 100 increases, the radial depth of stator slot 113 decreases, and the rigidity of stator core 110 is improved, resulting in better vibration resistance of the compressor. However, due to the reduced slot area ratio of stator slot 113, the amount of motor windings used also decreases, leading to increased electrical load and deterioration of motor temperature, which in turn reduces the reliability of the motor and compressor. When the value is greater than 0.42, the inner diameter of the stator core 110 decreases, the radial depth of the stator slots 113 increases, and the proportion of the slot area of ​​the stator slots 113 to the overall stator core 110 increases. This leads to a decrease in the rigidity of the stator core 110, thereby increasing the vibration and noise of the compressor. Thus, limiting... If the value is between 0.30 and 0.42, then after the motor is installed on the compressor, the compressor vibration is between 1.6 m / s. -2 up to 2.2 m·s -2 Between these temperatures, the compressor operates at a temperature between 93°C and 107°C, which effectively balances the rigidity of the stator 100 of the motor with its temperature.

[0044] Furthermore, in this embodiment, as Figure 6 As shown, When the value is 0.34, the compressor vibration is 1.8 m / s. -2 The operating temperature is 101℃; When the value is 0.38, the compressor vibration is 2.0 m / s. -2The operating temperature is 96℃. Therefore, the limit is... If the value is between 0.34 and 0.38, then after the motor is installed on the compressor, the compressor vibration is between 1.8 m / s. -2 Up to 2.0 m·s -2 Between these temperatures, the compressor operates at a temperature between 96°C and 101°C, which effectively balances the rigidity of the stator 100 of the motor with its temperature.

[0045] Specifically, The possible values ​​are 0.30, 0.32, 0.34, 0.36, 0.38, 0.40, or 0.42.

[0046] In one embodiment, please refer to Figures 1 to 3 It also satisfies: Understandable. The ratio between the thickness of the stator yoke 111 and the slot depth of the stator slot 113 is defined. The stator core 110 is the main path of the motor's magnetic circuit, and the stator yoke 111 serves as the loop for magnetic flux. The thickness of the stator yoke 111 directly affects the magnetic reluctance and magnetic flux density. D2 is the diameter of the circular outline formed by the bottom of the stator slot 113, and the difference between D2 and D3 reflects the radial slot depth of the stator slot 113. By... Controlling the thickness within the range of 0.55 to 0.65 ensures that the stator yoke 111 has sufficient thickness, thereby reducing magnetic reluctance, hysteresis and eddy current losses, and improving motor efficiency. Simultaneously, it ensures that the stator slots 113 have sufficient slot area to accommodate the windings, reducing the resulting temperature. The possible values ​​are 0.55, 0.56, 0.58, 0.60, 0.61, 0.63, or 0.65.

[0047] In one embodiment, please refer to Figures 1 to 3 The following conditions must be met: , , The number of slots per pole per phase of the motor is q, and the number of phases of the motor is m. Let q = Q / 2mP, satisfying: It can be understood that the motor in this embodiment is a low-slot pole-matching motor with a fractional-slot concentrated winding design. The number of stator slots 113, Q, is controlled between 15 and 18, and the number of pole pairs P of rotor 200 is controlled between 5 and 6. GCD(Q,P) is 5 or 6, indicating that there is a strong periodic matching relationship between stator 100 and rotor 200, which helps to form a highly symmetrical magnetomotive force distribution, thereby reducing cogging torque fluctuations, torque pulsation, and electromagnetic noise. At the same time, the enhanced periodicity of the cogging matching of the motor increases the harmonic order of the cogging torque and reduces its fundamental amplitude, thereby effectively suppressing cogging torque fluctuations and reducing vibration and noise during motor operation. For example, when Q=18 and P=6, GCD(Q,P)=6, indicating that every 6 poles correspond to a complete magnetic circuit cycle; when Q=15 and P=5, GCD(Q,P)=5, indicating that every 5 poles correspond to a magnetic circuit cycle. In addition, the number of slots q per pole per phase satisfies This indicates that each pole has only one or two stator slots 113, with concentrated winding and simplified winding process, thus balancing production cycle and winding equipment capacity, ensuring production efficiency. The stator slots 113 have high slot area utilization, low copper loss, and high efficiency; the magnetomotive force waveform is close to sinusoidal, with low harmonic content and small torque pulsation, which is beneficial for the lightweight and miniaturization of the motor. Of course, in other embodiments, the number of stator slots 113 Q, the number of pole pairs P of the rotor 200, and the number of phases m of the motor can be adjusted adaptively according to different application scenarios of the compressor, such as Q being 24, P being 8, and GCD(Q,P) being 8.

[0048] In one embodiment, please refer to Figure 1 and Figure 2 The following conditions must be met: , It can be understood that in this embodiment, the motor D1 is between 90mm and 160mm, covering the outer diameter of small and medium-sized motors (such as permanent magnet synchronous motors, induction motors, switched reluctance motors, etc.), and is suitable for home appliances, power tools, servo systems, electric vehicle auxiliary systems, etc. Here, the motor can achieve high power density while also considering manufacturing costs and assembly precision, meeting the development needs of lightweight, compact, and efficient motors. D2 is the diameter of the circular outline formed by the bottom of the stator slot 113, reflecting the inner boundary position of the stator slot 113. D2 is controlled between 80mm and 130mm, and combined with the value of D1, it ensures that the stator slot 113 has sufficient space to accommodate the windings, while retaining sufficient area of ​​the stator teeth 112 to support the magnetic flux path and mechanical strength. Wherein, D1 can be 90mm, 100mm, 110mm, 120mm, 130mm, 140mm, 150mm, or 160mm; D2 can be 80mm, 90mm, 100mm, 110mm, 120mm, or 130mm, in mm. Of course, in other embodiments, D1 and D2 can also be adaptively adjusted according to different application scenarios of the compressor, such as D1 being 80mm or 165mm, or D2 being 75mm or 135mm.

[0049] In one embodiment, please refer to Figures 1 to 3 The rotor core in the rotor 200 and the stator core 110 in the stator 100 of the motor are both formed by lamination and pressing. Figures 1 to 3 The structural schematic diagram is a projection diagram along the axial direction of the lamination.

[0050] The present invention also proposes a compressor, which includes a motor. The specific structure of the motor is as described in the above embodiments. Since this compressor adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here. The compressor is configured as a rotary compressor.

[0051] In one embodiment, please refer to Figure 4 and Figure 7 The compressor also includes a pump body 300 and a housing 400. The housing 400 includes a main housing 430 and a first housing 410 and a second housing 420 located at opposite ends of the main housing 430. The motor is located inside the main housing 430. The outer periphery of the stator core 110 is fixed to the inner periphery of the main housing 430. The axial length of the main housing 430 in the compressor is h, and the thickness of the main housing 430 is t. The units of h and t are mm. Combining D1 and D2, the following conditions are met: It should be noted that the compressor is configured as a vertical compressor. The thickness t of the main housing 430 and the axial length h of the main housing 430 in the compressor are the average thickness and average height of the main housing 430. D1 and D2 are in mm. The motor is connected to the main housing 430 by fixing it to the outer circumference of the stator 100, such as by welding, with an interference fit. The thicker the thickness t of the main housing 430, the stronger the support of the main housing 430 for the stator core 110, and the higher the rigidity of the stator core 110. However, when the axial length h of the main housing 430 is larger, the center of gravity of the compressor is higher, the vibration of the compressor is more obvious, and the noise deterioration is more serious. Furthermore, as mentioned above... The description, in For a given value, the larger the outer diameter D1 of the stator core 110, the greater the motor output torque, but also the greater the motor vibration; with a fixed value for D1, The larger the stator yoke 111, the greater the thickness of the stator core 110, the stronger the rigidity of the stator core 110, and the smaller the area of ​​the stator slot 113, resulting in a higher operating temperature of the motor and affecting the reliability of the compressor.

[0052] like Figure 7 As shown, When the value is 0.8, the compressor vibration is 4.0 m / s. -2 The operating temperature is 80℃; When the value is 0.9, the compressor vibration is 2.8 m / s. -2 The operating temperature is 84.5℃; When the value is 0.95, the compressor vibration is 2.4 m / s. -2 The operating temperature is 87℃; When the value is 1.0, the compressor vibration is 2.0 m / s. -2 The operating temperature is 90℃; When the value is 1.08, the compressor vibration is 1.5 m / s. -2 The operating temperature is 93.5℃; When the value is 1.1, the compressor vibration is 1.4 m / s. -2 The operating temperature is 95.5℃; When the value is 1.2, the compressor vibration is 1.0 m / s. -2 The operating temperature is 100℃; When the value is 1.3, the compressor vibration is 0.7 m / s. -2 The operating temperature is 108.5℃; When the value is 1.4, the compressor vibration is 0.5 m / s. -2 The operating temperature is 112℃; When the value is 1.5, the compressor vibration is 0.4 m / s. -2The operating temperature is 120℃; When the value is 1.6, the compressor vibration is 0.25 m / s. -2 The operating temperature is 128℃.

[0053] It can be seen that when When the thickness is less than 0.95, the main housing 430 is relatively thin, resulting in a higher axial thickness of the main housing 430 within the compressor. This leads to a larger outer diameter of the stator core 110 and a thinner stator yoke 111, causing greater compressor vibration and noise, thus affecting the user experience. When the thickness is greater than 1.5, the main housing 430 has a larger thickness, and the stator yoke 111 also has a larger thickness. Although the vibration of the compressor is suppressed to some extent, the radial groove depth of the stator slot 113 is shallow, which reduces the slot area of ​​the stator slot 113. This results in a higher operating temperature for the motor, affecting the reliability of the compressor. Therefore, the following limitations apply. If the vibration is between 0.95 and 1.5, then after the motor is installed behind the compressor, the compressor vibration will be around 0.4 m / s. -2 Up to 2.4 m·s -2 Between these temperatures, the compressor operates at a temperature between 87°C and 120°C, which effectively balances the rigidity and temperature of the stator 100 of the motor.

[0054] Furthermore, in this embodiment, as Figure 7 As shown, When the value is 1.0, the compressor vibration is 2.0 m / s. -2 The operating temperature is 90℃; When the value is 1.08, the compressor vibration is 1.5 m / s. -2 The operating temperature is 93.5℃; When the value is 1.1, the compressor vibration is 1.4 m / s. -2 The operating temperature is 95.5℃; When the value is 1.2, the compressor vibration is 1.0 m / s. -2 The operating temperature is 100℃. Therefore, the limit is... If the value is between 1.0 and 1.2, then after the motor is installed behind the compressor, the compressor vibration is within 1.0 m / s. -2 Up to 2.0 m·s -2 Between these temperatures, the compressor operates at a temperature between 90°C and 100°C, which effectively balances the rigidity and temperature of the stator 100 of the motor.

[0055] Specifically, The possible values ​​are 0.95, 1.0, 1.08, 1.1, 1.2, 1.3, 1.4 or 1.5.

[0056] In one embodiment, such as Figure 4 As shown, the compressor is configured as a rotary compressor. The pump body 300 includes a crankshaft 310, a bearing, and a cylinder. The bearing is located at the shaft of the rotor 200 of the motor. The crankshaft 310 is connected to the rotor 200 and rotates with the rotor 200. The cylinder is provided with an inlet and an outlet. The rotor 200 drives the crankshaft 310 to rotate, thereby driving the cylinder to switch between the inlet and the outlet to perform work.

[0057] This invention also proposes a refrigeration device, which includes a compressor. The specific structure of the compressor is as described in the above embodiments. Since this refrigeration device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated here. The refrigeration device can be configured as a refrigerator, air conditioner, etc.

[0058] The above description is merely an exemplary embodiment of the present invention and does not limit the scope of protection of the present invention. Any equivalent structural transformations made based on the technical concept of the present invention and the contents of the specification and drawings of the present invention, or direct / indirect applications in other related technical fields, are included within the scope of protection of the present invention.

Claims

1. An electric motor, characterized in that, include: A stator, comprising a stator core and windings, wherein the stator core includes a stator yoke and a plurality of stator teeth spaced apart along the inner circumference of the stator yoke, two adjacent stator teeth and the stator yoke forming a stator slot, the windings being disposed in the stator slots, the number of stator slots being Q, the diameter of the maximum outer circle of the stator core being D1, the diameter of the maximum circle formed by the bottoms of the plurality of stator slots being D2, and the diameter of the minimum inner circle of the stator core being D3; and A rotor, which is rotatably mounted within the stator, has P pole pairs. Simultaneously satisfy: and Where GCD(Q,P) is the greatest common divisor of Q and P, and the units of D1, D2, and D3 are mm.

2. The motor as described in claim 1, characterized in that, 。 3. The motor as described in claim 1, characterized in that, 。 4. The motor as described in claim 1, characterized in that, 。 5. The motor as described in claim 1, characterized in that, , , The number of slots per pole per phase of the motor is q, and the number of phases of the motor is m. Let q = Q / 2mP, satisfying: .

6. The motor as described in any one of claims 1 to 5, characterized in that, ， 。 7. A compressor, characterized in that, The compressor includes the motor as described in any one of claims 1 to 6, wherein the compressor is configured as a rotary compressor.

8. The compressor as claimed in claim 7, characterized in that, The compressor further includes a pump body and a housing. The housing includes a main housing and a first housing and a second housing located at opposite ends of the main housing. The motor is located inside the main housing. The outer periphery of the stator core is fixed to the inner periphery of the main housing. The axial length of the main housing in the compressor is h, and the thickness of the main housing is t, where h and t are in mm. The following conditions must be met: .

9. The compressor as claimed in claim 8, characterized in that, 。 10. A refrigeration device, characterized in that, Includes the compressor as described in any one of claims 7 to 9.

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