Compressor and refrigeration apparatus

Abstract

The application discloses a compressor and a refrigeration equipment, and relates to the technical field of refrigeration equipment, wherein the compressor comprises a motor and a compression part, the motor comprises a rotor and a stator core, the stator core comprises a plurality of stator teeth which are arranged at intervals, a stator slot is formed between two adjacent stator teeth, the sum of the axial sectional areas of all the stator slots is S1, the axial sectional area of the stator core is S2, the diameter of a connecting section of the rotor and the crankshaft is D1, the inner diameter of the cylinder is D2, and / or S1 / S2 is greater than 1.5 and less than 2.5, D1 / D2 is greater than 0.5 and less than 1.5, and / or the ratio of the diameter of the connecting section of the rotor and the crankshaft to the inner diameter of the cylinder is greater than 0.5 and less than 1.5. The technical scheme can improve the working energy efficiency of the compressor.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of refrigeration equipment, in particular to a compressor and refrigeration equipment. BACKGROUND

[0002] At present, with the rapid development of economic level and the improvement of people's living standard, miniaturization, high efficiency and low noise are increasingly becoming the demands of people in the field of compressor. The structure design of the stator core of the motor in the related art is not reasonable, and the cooperation of the motor and the pump body is not reasonable, which causes poor working energy efficiency of the compressor. SUMMARY

[0003] The main purpose of the present application is to provide a compressor and refrigeration equipment, which aims to improve the working energy efficiency of the compressor.

[0004] To achieve the above purpose, the compressor provided by the present application comprises:

[0005] A motor comprising a rotor and a stator core, the stator core comprising a plurality of stator teeth arranged at intervals, a stator slot being formed between adjacent two stator teeth, the sum of the axial cross-sectional areas of all the stator slots being , the axial cross-sectional area of the stator core being , the and satisfy: ; and

[0006] A compression part comprising a crankshaft and a cylinder, the diameter of the connecting section of the crankshaft connected with the rotor being , the inner diameter of the cylinder being ; the and satisfy: ; and / or, and satisfy: .

[0007] In an embodiment, the crankshaft is provided with an eccentric part and can drive the eccentric part to rotate eccentrically in the cylinder, and the eccentric distance of the eccentric part is e, the , and e satisfy: .

[0008] In an embodiment, the inner diameter of the stator core is , the and satisfy: .

[0009] In an embodiment, the axial cross-sectional area of the rotor is , the sum of axial cross-sectional areas of all the rotor slots is and satisfy: .

[0010] In an embodiment, the rotor is provided with a plurality of rotor slots, the sum of axial cross-sectional areas of all the rotor slots is , the sum of axial cross-sectional areas of all the rotor slots is and satisfy: .

[0011] In an embodiment, the outer periphery of the stator core comprises a plurality of arc edge segments and a plurality of straight edge segments, the stator core has a first outer diameter at the arc edge segments , the stator core has a second outer diameter at the straight edge segments , the sum of axial cross-sectional areas of all the rotor slots is and satisfy: .

[0012] In an embodiment, two of the plurality of straight edge segments are spaced apart by at least one arc edge segment, and the two straight edge segments are oppositely arranged in the radial direction of the stator core.

[0013] In an embodiment, .

[0014] In an embodiment, the inner diameter of the stator core is , ; and / or,

[0015] ; and / or,

[0016] ; and / or,

[0017] the axial cross-sectional area of the rotor is , .

[0018] In an embodiment, the rotor is a squirrel cage structure.

[0019] In an embodiment, the motor further comprises a wire, the wire is wound around the stator teeth, and the material of the wire comprises aluminum.

[0020] The application also provides a refrigeration device comprising the compressor as described above.

[0021] The technical scheme of the application sets up a motor, the motor comprises a rotor and a stator core, the stator core comprises a plurality of spaced apart stator teeth, a stator slot is formed between two adjacent stator teeth, the sum of axial cross-sectional areas of all the stator slots is The axial cross-sectional area of ​​the stator core is The and satisfy: That is, by limiting the area of ​​the stator laminations. The sum of the areas of all stator slots The ratio is between 0.4 and 0.6, which ensures that the area of ​​stator slot 1 is not too large, so that the stator lamination has good structural strength, and the area of ​​stator slot is not too small, so as to help the stator winding to dissipate heat and thus avoid the motor from overheating.

[0022] Secondly, the compressor also includes a compression section, which comprises a crankshaft and a cylinder, wherein the diameter of the connection section between the crankshaft and the rotor is [missing information]. The inner diameter of the cylinder is The and satisfy: Its area It can often characterize the displacement capacity of the compressor section. Smaller... This can reduce friction loss, but the crankshaft's bending strength must also be considered. Stator slots are used to accommodate conductors; the total area of ​​the stator slots... Directly related to the motor's output power, total area A larger slot area means a larger slot area, which in turn allows for more turns of wire in the windings, thus improving motor efficiency. Limitations By constraining the ratio of the total area of ​​the stator slots to the cross-sectional area of ​​the crankshaft, the matching of the motor output power and the input power of the compressor is ensured, thereby enhancing product competitiveness.

[0023] and satisfy: Cylinder inner diameter It can also determine the formation volume of the eccentric part, and thus characterize the displacement capacity of the compressor section. Smaller... Suitable for low-displacement applications, but the wear resistance and thermal deformation of the cylinder walls must be considered. The stator slots are used to accommodate the wires; the total area of ​​the stator slots... Directly related to the motor's output power, total area A larger value means higher output power, thus improving motor efficiency. Limitations This ensures the matching of motor output power and compressor input power by constraining the ratio of the total area of ​​stator slots to the cross-sectional area of ​​the cylinder. Therefore, this solution improves the efficiency of the motor by rationally designing the dimensions of the stator laminations, stator slots, crankshaft outer diameter, and cylinder inner diameter. The appropriate matching of motor output and pump input reduces motor heat generation and enhances the reliability and stability of the compressor during operation. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description only represent some of the embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort based on the drawings shown.

[0025] Figure 1 A schematic structural view of a motor in an embodiment of the compressor provided by the present application is shown in the figure.

[0026] Figure 2 A schematic structural view of a stator core in an embodiment of the compressor provided by the present application is shown in the figure. Figure 1

[0027] Figure 3 A schematic structural view of a rotor in an embodiment of the compressor provided by the present application is shown in the figure. Figure 1

[0028] A sectional view of a compression part in an embodiment of the compressor provided by the present application is shown in the figure. Figure 4 A description of reference signs is shown in the table below.

[0029] 1, stator core; 11, stator tooth; 12, stator slot; 13, straight edge section; 14, arc edge section; 2, rotor; 21, rotor slot; 3, compression part; 31, crankshaft; 32, cylinder; 33, eccentric part.

[0030] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings.

[0031] DETAILED DESCRIPTION The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments only represent some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative effort belong to the scope of protection of the present application.

[0032] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement condition, etc. between the components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.

[0033]

[0034] ​​In addition, if the description of "first", "second" and the like is involved in the embodiments of the present application, the description of "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one of the features. In addition, if "and / or" or "and / or" appears throughout the text, it means that the three parallel schemes are included, for example, "A and / or B" includes A scheme, or B scheme, or A and B scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of the ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor in the protection scope required by the present application.

[0035] The present application provides a compressor.

[0036] Please refer to Figures 1 to 4 In an embodiment of the present application, comprising:

[0037] The motor comprises a rotor 2 and a stator core 1, the stator core 1 comprises a plurality of spaced apart stator teeth 11, and a stator slot 12 is formed between adjacent two stator teeth 11, the sum of the axial cross-sectional areas of all the stator slots 12 is The axial cross-sectional area of the stator core 1 is The and satisfy: ; and

[0038] The compression part 3 comprises a crankshaft 31 and a cylinder 32, the diameter of the connecting section of the crankshaft 31 connected with the rotor 2 is The inner diameter of the cylinder 32 is The and satisfy: ; and / or, and satisfy: .

[0039] Specifically, the compressor in the application is a rotary compressor, mainly comprising a motor and a compression part 3, the motor is composed of a stator core 1 and a rotor 2, wherein the stator core 1 is fixed in the shell of the motor, and the rotor 2 is rotatably arranged inside the stator core 1. The compression part 3 comprises a crankshaft 31, a cylinder 32 and an eccentric part 33, one end of the crankshaft 31 is connected with the rotor 2, and the eccentric part 33 is eccentrically connected to the other end of the crankshaft 31, so that the crankshaft 31 drives the eccentric part 33 to rotate eccentrically in the cylinder 32 under the action of the rotor 2, so as to continuously realize the compression of the refrigerant gas. The stator core 1 is often composed of a plurality of stator laminations which are sequentially stacked along the axial direction, the stator lamination comprises a stator yoke and a plurality of stator teeth 11, and the plurality of stator teeth 11 and the stator yoke can be integrally stamped and formed. Among them, the stator yoke is arranged in a ring shape, the stator teeth 11 protrude from the inner periphery of the stator yoke, and are arranged in the middle of the stator yoke. In this embodiment, the number of stator teeth 11 is set to 24, of course, the number of stator teeth 11 can also be less than 24, or more than 24. Among them, the stator slots 12 are formed between adjacent stator teeth 11, therefore, the number of stator slots 12 is consistent with the number of stator teeth 11.

[0040] The sum of the axial cross-sectional areas of all the stator slots 12 is (also referred to as the total area of the stator slots 12 ). Let the axial cross-sectional area of a single stator slot 12 be , and the stator lamination is provided with stator slots 12, then the sum of the axial cross-sectional areas of stator slots 12 is Figure 2 ; the area of the shaded part in Figure 2 , , and it can be clearly seen from Figure 2 that the axial cross-sectional area of the slot opening of the stator slot 12 is included in the axial cross-sectional area of a single stator slot 12 . Among them, the axial cross-sectional areas of the stator slots 12 on the same stator lamination may be equal or not. And since the stator slot 12 is of irregular type, the axial cross-sectional area of each stator slot 12 can be measured by simulation software, and then the values of the axial cross-sectional areas of all the stator slots 12 on the stator core are added to obtain the sum of the axial cross-sectional areas of all the stator slots 12 ; if the axial cross-sectional areas of each stator slot 12 on the stator core are all equal, only the axial cross-sectional area of a stator slot can be measured, and then multiplied by the number of stator slots , the sum of the cross-sectional areas of all the stator slots 12 can also be obtained .

[0041] When the outer periphery of the stator sheet is configured as a whole circle, the area of the stator sheet is The specific measurement method can be: first, the size of the outer diameter and the inner diameter of the stator sheet is measured respectively, the area of the circular ring is calculated through the area formula, and then the sum of the cross-sectional areas of the stator slots 12 is subtracted , so as to obtain the axial cross-sectional area of the stator core 1 . Of course, the axial cross-sectional area of the stator core 1 can also be substituted into the relevant data and directly measured through simulation software, and and The unit of .

[0042] The area of the stator sheet should not be too large, at this time, the area of the stator slot 12 is too large, which may reduce the structural strength of the stator sheet itself; nor too small, Too small will increase the resistance of the winding, thereby reducing the efficiency of the motor, so the appropriate value of should be selected, so that the motor remains to have high efficiency and good structural strength.

[0043] The axial cross-sectional area of the stator core 1 is , that is, the area of the stator sheet is . And and satisfy: , that is, by limiting the ratio of the area of the stator sheet to the sum of the areas of all stator slots 12 on the stator sheet between 0.4 and 0.6, so that the area of the stator slot 121 is not too large, the stator sheet has good structural strength, and the area of the stator slot 12 is not too small, which helps the stator winding to dissipate heat, thereby avoiding overheating of the motor. And the technical scheme of the present application reasonably designs the size of the stator sheet and the stator slot 12, thereby improving the efficiency of the motor with the stator sheet, reducing the heat generation of the motor, and improving the reliability and stability of the motor during operation.

[0044] The diameter of the connecting section (i.e. the main shaft) of the crankshaft 31 connected with the rotor 2 is , and the diameter often determines the rigidity of the crankshaft 31, and the axial cross-sectional area often represents the displacement capacity of the compression part 3. Smaller can reduce friction loss, but the bending strength of the crankshaft 31 needs to be considered. The stator slot 12 is used to accommodate the wire, and the total area of the stator slot 12 The output power of the motor is directly related to the total area of the stator slot 12 The larger the ratio means higher slot area, which corresponds to more turns of wire that can be used for the winding, thus improving the efficiency of the motor. The ratio is limited , so as to ensure the matching of the motor output power and the input power of the compression part 3. If the ratio is too low ( ), the motor power is insufficient to drive the crankshaft 31; if the ratio is too high ( ), the crankshaft 31 is not rigid enough and is prone to deformation. At the same time, when the ratio is too high, it means that the output torque of the motor can drive a larger pump body, which will lead to overcapacity of the motor, low material utilization of the motor, and high cost of the motor.

[0045] At present, the range of is analyzed in relation to the efficiency and cost of the motor in many products, and the results are basically similar. The following table shows the relationship between the range of and the efficiency and cost of the motor in a product:

[0046]

[0047] Among them, the rest of the design of the compressor is in an optimal state at the corresponding ratio. As can be seen from the above table, as the ratio increases, the efficiency of the motor gradually increases, and the cost of the motor also gradually increases; when the ratio is equal to 10, the efficiency of the motor can reach 80%, which basically reaches the acceptable motor efficiency when the compressor meets the market energy efficiency standard. With further increase of the ratio, although the cost will further increase, the efficiency of the motor is still in a relatively large state of improvement, but when the ratio is greater than 15, although the ratio further increases, the efficiency of the motor improves, but the improvement is relatively small compared to the previous one, and in the case of low efficiency improvement, the cost of the motor will increase sharply, which is not conducive to the overall competitiveness of the product. In summary, through theoretical analysis and experimental verification, it is determined that the range of is 10-15, which helps to match the motor output and the input power of the compression part 3, to balance the efficiency and reliability, and to improve the competitiveness of the product.

[0048] In another embodiment of the present application, the and satisfy: . Specifically, the inner diameter of the cylinder 32 , which can also determine the volume of the eccentric part 33, and thus can represent the displacement capacity of the compression part 3. A smaller is suitable for low displacement scenarios, but the wear resistance and thermal deformation of the cylinder wall need to be considered. The stator slot 12 is used to accommodate the wire, and the total area of the stator slot 12 Directly related to the motor's output power, total area A larger value means higher output power, thus improving motor efficiency. Limitations This ensures the matching of motor output power and compressor input power by constraining the ratio of the total area of ​​stator slot 12 to the cross-sectional area of ​​cylinder 32. If the ratio is too low ( The motor power is insufficient to drive the compression unit 3; if the ratio is too high ( If the cylinder displacement is too small (32), it leads to wasted energy. Conversely, if this ratio is too high, it can result in excess capacity in the motor, low material utilization, and high motor cost.

[0049] Currently, in multiple products, targeting The relationship between the range of parameters and motor efficiency and cost was analyzed, and the results were basically similar. The table below shows the relationship between the range of parameters and motor efficiency and cost for a single product. The relationship between the range of motor efficiency and motor cost:

[0050]

[0051] Among these, the remaining related designs of the compressor are optimal at the corresponding ratio. As shown in the table above, as the ratio increases, motor efficiency gradually increases, but so does motor cost. When the ratio equals 1, motor efficiency reaches 80%, which is basically acceptable for a compressor to meet market energy efficiency standards. With further increases in the ratio, although cost increases further, motor efficiency still sees a relatively significant improvement. However, when the ratio exceeds 2, although the ratio increases further, motor efficiency remains largely unchanged, while motor cost increases dramatically, which is detrimental to the overall competitiveness of the product. In summary, through theoretical analysis and experimental verification, the optimal motor efficiency is determined to be... The range is 1 to 2, which helps to match the output power of the motor and the input power of the compressor 3, so as to balance efficiency and reliability and enhance the competitiveness of the product.

[0052] In another embodiment of the present invention, the crankshaft 31 is provided with an eccentric portion 33, which can drive the eccentric portion 33 to rotate eccentrically within the cylinder 32, and the eccentricity of the eccentric portion 33 is e. , And e satisfy: .

[0053] Specifically, the eccentricity of the eccentric portion 33 is e, and the axis of the cylinder 32 is denoted as e. The axis of the eccentric part is e is and The spacing between them. The inner diameter of cylinder 32. The eccentricity e of the eccentric portion 33 also helps to define the effective working volume of the cylinder 32. When the eccentric portion 33 rotates eccentrically within the cylinder 32, its area is determined by the formula... Calculation, i.e. This parameter determines the displacement capacity of the compressor section 3; a smaller displacement capacity results in a lower displacement. Option e is suitable for low-displacement applications, but the wear resistance and thermal deformation of the cylinder wall 32 must be considered. Stator slot 12 is used to accommodate wires, and its total area... Directly related to the motor's output power, total area Larger means higher output power. Limitations This ensures the matching of motor output power and compressor input power by constraining the ratio of the total area of ​​stator slot 12 to the cross-sectional area of ​​cylinder 32. If the ratio is too low ( The motor power is insufficient to drive the compression unit 3; if the ratio is too high ( If the cylinder displacement is too small, it will lead to energy waste. At the same time, if this ratio is too high, it means that the output torque of the motor can drive a larger pump body, which will lead to excess capacity of the motor, low material utilization of the motor, and high cost of the motor.

[0054] Currently, in multiple products, targeting The relationship between motor efficiency and cost was analyzed within a certain range, and the results were basically similar. The table below shows the relationship between motor efficiency and cost for a single product. The relationship between the range of motor efficiency and motor cost:

[0055]

[0056] Among these, the compressor's other related designs are optimal at the corresponding ratio. As shown in the table above, as the ratio increases, motor efficiency gradually increases, but so does motor cost. When the ratio equals 3, motor efficiency reaches 80%, which is basically acceptable for a compressor to meet market energy efficiency standards. With further increases in the ratio, although cost increases further, motor efficiency still sees a relatively significant improvement. However, when the ratio exceeds 4, although the ratio increases further, motor performance remains largely unchanged, while motor cost increases dramatically, negatively impacting the product's overall competitiveness. In summary, through theoretical analysis and experiments, the optimal ratio for the compressor is determined to be 3. The range is 3 to 4, which helps to match the output power of the motor and the input power of the compressor 3, so as to balance efficiency and reliability and enhance the competitiveness of the product.

[0057] In embodiments of the present invention, see Figures 1 to 3 The inner diameter of the stator core 1 is The and satisfies: Specifically, the stator slot 12 is used to accommodate motor winding wires, and the total area of the stator slot 12 directly affects the resistance and current carrying capacity of the winding, and a larger can reduce copper loss, Overly large may also cause the stator tooth 11 to have excessively high magnetic density, increasing iron loss, so it needs to be controlled within a reasonable range, and the inner diameter of the stator core 1 determines the rotor 2 installation space and magnetic path length, and further characterizes the cross-sectional area of the stator inner contour, affecting the magnetic flux distribution and core loss, and controlling represents the proportion of motor stator winding loss and iron loss, and also represents the proportion of controlling winding loss in the entire loss.

[0058] At present, the relationship between the range of and motor efficiency has been analyzed on multiple products, and the results are basically similar. The following table shows the relationship between the range of and motor efficiency on a product:

[0059]

[0060] Among them, the rest of the related design of the compressor is in the optimal state under the corresponding ratio. As can be seen from the above table, as the ratio increases, the motor efficiency gradually increases, and the motor cost also gradually increases; when the ratio is equal to 0.8, the motor efficiency can reach 80%, which basically reaches the acceptable motor efficiency when the compressor meets the market energy efficiency standard, when the ratio is 0.95, the efficiency of the motor reaches the maximum, and then continue to increase the ratio, the efficiency of the motor will gradually decrease, until the ratio is greater than 1.05, the efficiency of the motor starts to be lower than 80%, therefore, in order to ensure the optimal motor efficiency, limit the ratio to 0.80~1.05. In summary, through theoretical analysis and experimental verification, it is determined that the range of is 0.80~1.05, which can control the ratio of winding loss and iron loss, which is conducive to reducing the total loss, reducing the total heat generation, and improving the motor efficiency.

[0061] Referring again to Figures 1 to 3 , in the embodiment of the present application, the axial cross-sectional area of the rotor 2 is , the and satisfy: ​Specifically, in the design of traditional compressor motors, the relationship between the stator slot 12 area and the rotor 2 cross-sectional area is often overlooked, leading to an imbalance in the ratio of stator winding losses (copper losses) to rotor 2 losses (such as aluminum losses or eddy current losses), resulting in high total heat generation and limited efficiency. For example, in existing technology, an excessively large stator slot 12 area may increase winding resistance losses, while an excessively small area may lead to rotor 2 magnetic flux saturation or insufficient heat dissipation, both of which affect motor performance. Therefore, setting... The ratio is in the range of 1.3 to 1.8, thereby controlling the winding loss within a reasonable range. By adjusting the ratio of winding loss to rotor loss, the total loss can be reduced, the total heat generation can be reduced, and the motor efficiency can be improved.

[0062] Currently, in multiple products, targeting The relationship between the range and motor efficiency was analyzed, and the results were basically similar. The table below shows the relationship between the range and motor efficiency of a product. The relationship between the range and motor efficiency:

[0063]

[0064] At the corresponding ratio, the remaining related designs of the compressor are in their optimal state. As can be seen from the table above, as the ratio increases, the motor efficiency gradually increases, but so does the motor cost. When the ratio equals 1.3, the motor efficiency reaches 80%, which is basically acceptable for a compressor to meet market energy efficiency standards. When the ratio is 1.6, the motor efficiency reaches its maximum. Further increasing the ratio will gradually decrease the motor efficiency until it exceeds 1.8, at which point the motor efficiency begins to fall below 80%. Therefore, to ensure optimal motor efficiency, the ratio is limited to 1.3~1.8.

[0065] In an embodiment of the present invention, the rotor 2 is provided with a plurality of rotor slots 21, and the sum of the axial cross-sectional areas of all the rotor slots 21 is The and satisfy: Specifically, let the axial cross-sectional area of ​​a single rotor slot 21 be... And one rotor is equipped with Each rotor slot 21, then Axial cross-sectional area of ​​each rotor slot 21 The sum is See also Figure 3 , Figure 3 The area of ​​the shaded region is... Among them, the axial cross-sectional area of ​​rotor slot 21 on the same rotor 2. They may be equal or unequal. Furthermore, since the rotor slot 21 is irregular, the axial cross-sectional area of ​​each rotor slot 21 can be measured using simulation software. Then, the axial cross-sectional area of ​​all rotor slots 21 on rotor 2 is calculated. The values ​​are added together to obtain the sum of the cross-sectional areas of all rotor slots 21. If the axial cross-sectional area of ​​all rotor slots 21 on rotor 2 is... If all are equal, it is also possible to measure only the axial cross-sectional area of ​​one rotor slot 21. Then multiply by the number of rotor slots 21 The sum of the cross-sectional areas of all rotor slots 21 can also be obtained. In traditional compressor motor design, the relationship between the sum of the areas of rotor slots 21 and the cross-sectional area of ​​rotor 2 is often overlooked, leading to an imbalance in the ratio of stator winding losses (copper losses) to rotor 2 losses (such as aluminum losses or eddy current losses), resulting in high total heat generation and limited efficiency. For example, in existing technology, an excessively large stator slot 12 area may increase winding resistance losses, while an excessively small area may lead to rotor 2 magnetic flux saturation or insufficient heat dissipation, both of which affect motor performance. Therefore, the area of ​​the stator slot 12 is set... The ratio is in the range of 3 to 5, thereby controlling the winding loss within a reasonable range. By adjusting the ratio of winding loss to rotor loss, the total loss can be reduced, the total heat generation can be reduced, and the motor efficiency can be improved.

[0066] Currently, in multiple products, targeting The relationship between the range and motor efficiency was analyzed, and the results were basically similar. The table below shows the relationship between the range and motor efficiency for a single product. The relationship between the range and motor efficiency:

[0067]

[0068] At the corresponding ratio, the remaining related designs of the compressor are in their optimal state. As can be seen from the table above, as the ratio increases, the motor efficiency gradually increases, but so does the motor cost. When the ratio equals 3, the motor efficiency reaches 80%, which is basically acceptable for a compressor to meet market energy efficiency standards. When the ratio is 4, the motor efficiency reaches its maximum. Further increasing the ratio will gradually decrease the motor efficiency until it exceeds 5, at which point the motor efficiency begins to fall below 80%. Therefore, to ensure optimal motor efficiency, the ratio is limited to between 3 and 5.

[0069] See again Figures 1 to 3 In an embodiment of the present invention, the outer periphery of the stator core 1 includes a plurality of arc-shaped segments 14 and a plurality of straight segments 13, and the stator core 1 has a first outer diameter at the arc-shaped segment 14. The stator core 1 has a second outer diameter at the straight edge section 13. The and satisfy: Specifically, the outer periphery of the stator core 1 comprises a plurality of arc edge segments 14 and a plurality of straight edge segments 13, that is, the outer periphery of the axial section of the stator core 1 is not a whole circle. It should be noted that, considering that the motor using the stator core 1 is used in a compressor, in order to enable the refrigerant to pass from the outside of the motor, thereby achieving a better heat dissipation effect, the outer periphery of the stator core 1 is configured by a plurality of arc edge segments 14 and a plurality of straight edge segments 13 alternately arranged, so that the refrigerant can pass from the outside of the straight edge segment 13.

[0070] Further, two of the plurality of straight edge segments 13 are spaced apart by at least one arc edge segment 14, and the two straight edge segments 13 are oppositely arranged in the radial direction of the stator core 1.

[0071] In the embodiment, with reference to Figure 1 , the outer periphery of the stator core 1 comprises four straight edge segments 13 and four arc edge segments 14, wherein the four straight edge segments 13 and the four arc edge segments 14 are arranged alternately, and the four straight edge segments 13 are divided into two groups, and two of the straight edge segments 13 in any one group are oppositely arranged in the radial direction of the stator core 1. The stator core 1 has a second outer diameter at the straight edge segment 13, and is the distance between the two straight edge segments 13 in any one group; correspondingly, the four arc edge segments 14 are also divided into two groups, and two of the arc edge segments 14 in any one group are oppositely arranged in the radial direction of the stator core 1. The stator core 1 has a first outer diameter at the arc edge segment 14, and is the distance between the two arc edge segments 14 in any one group.

[0072] And in the embodiment, ; by limiting the minimum value of to 60mm, the compactness of the motor can be ensured, the size of the motor is prevented from being too large, and the space and cost are saved. And cannot be too large, so as to ensure the operation reliability of the motor. The reasonable range of the length of helps to optimize the electromagnetic performance of the motor, so as to ensure stable electromagnetic distribution and high efficiency of the motor during operation. Among them, the length of is usually slightly smaller than the length of ; of course, in other embodiments, , at this time, the outer periphery of the stator core 1 is configured as a whole circle.

[0073] In the embodiment of the application, the inner diameter of the stator core 1 is , ; by limiting The range helps ensure the structural stability of the motor, preventing vibration and noise caused by structural instability during operation. Furthermore, through... The limitations can make more rational use of materials, avoid waste and overuse, and help reduce costs.

[0074] In another embodiment, ; and / or, ; thereby limiting separately and / or This range helps ensure the structural stability of the motor, preventing vibration and noise caused by structural instability during operation, and through... and / or The limitations can make more rational use of materials, avoid waste and overuse, and help reduce costs.

[0075] Furthermore, the motor also includes a rotor 2, the axial cross-sectional area of ​​which is... , By limiting the inner diameter of the stator core 1, the outer diameter of the rotor 2 can be limited, thereby limiting the axial cross-sectional area of ​​the rotor 2. This further improves the fit between the stator core 1 and the rotor 2, allowing for more rational use of materials, avoiding waste and overuse, and helping to reduce costs.

[0076] The rotor 2 is a squirrel-cage structure. A squirrel-cage motor is a type of three-phase asynchronous motor. The squirrel-cage rotor 2 is the rotating part of the squirrel-cage motor. Generally, copper or aluminum rotor wires are cast into the slots of the cage on the rotor 2. These rotor wires form a closed loop, not connected to other parts, and their main function is to suppress stator current. The rotor 2 of the squirrel-cage motor has a simple structure and does not require a separate commutator, thus simplifying the overall structure and reducing the motor's manufacturing cost.

[0077] In an embodiment of the present invention, the motor further includes wires wound around the stator teeth 11; the wires are made of aluminum. That is, the stator winding is made of aluminum. Conventional induction motors in the prior art typically use copper wire windings. Although copper wire has good conductivity, it is expensive and heavy. Furthermore, copper accounts for only 0.0068% of the Earth's crust, which is relatively small, yet the demand in industries such as electrical, electronics, transportation, and construction is significant. In contrast, aluminum accounts for 8.23% of the Earth's crust, making it the third most abundant element, and its resources are very plentiful. To reduce resource consumption, lower costs, and reduce weight, the stator winding in this solution uses aluminum.

[0078] It should be noted that the material of the wire includes aluminum, which does not mean that the wire is made of pure aluminum material, and it can also be made of pure aluminum alloy material or copper-coated aluminum material.

[0079] The application further provides a refrigeration device, which comprises a compressor, the specific structure of which is referred to the above-mentioned embodiments, and since the refrigeration device adopts all the technical solutions of the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here.

[0080] The above-mentioned is only an exemplary embodiment of the application, and does not limit the scope of the application, and any equivalent structural transformation made by using the content of the application specification and drawings, or direct / indirect application in other related technical fields is included in the protection scope of the application.

Claims

1. A compressor characterized by, Comprising: The electric machine comprises a rotor and a stator core, the stator core comprises a plurality of spaced stator teeth, a stator slot is formed between two adjacent stator teeth, the sum of the axial sectional areas of all the stator slots is , the axial sectional area of the stator core is , the and satisfy: ; And The compression part comprises a crankshaft and a cylinder, the diameter of the connecting section of the crankshaft connected with the rotor is , the inner diameter of the cylinder is ; the and satisfy: ; and / or, the and satisfy: .

2. The compressor of claim 1, wherein, The crankshaft is provided with an eccentric part and can drive the eccentric part to eccentrically rotate in the cylinder, and the eccentricity of the eccentric part is e, the , and e satisfy: .

3. The compressor of claim 1, wherein, The inner diameter of the stator core is , the and satisfy: .

4. The compressor of claim 1, wherein, The axial cross-sectional area of the rotor is , the and satisfy: .

5. The compressor of claim 1, wherein, The rotor is provided with a plurality of rotor slots, the sum of the axial sectional areas of all the rotor slots is , the and satisfy: .

6. The compressor of claim 1, wherein, The outer periphery of the stator core includes a plurality of arc edge segments and a plurality of straight edge segments, the stator core having a first outer diameter at the arc edge segments , the stator core having a second outer diameter at the straight edge segments , the and satisfy: .

7. The compressor of claim 6, wherein, Two of the plurality of straight edge segments are spaced apart by at least one arcuate edge segment, and the two straight edge segments are oppositely disposed in a radial direction of the stator core.

8. The compressor of claim 6, wherein, 。 9. The compressor of claim 1, wherein, The inner diameter of the stator core is , ; and / or, ; and / or, ; and / or, The axial cross-sectional area of the rotor is , .

10. The compressor of any one of claims 1 to 9, wherein, The rotor is a squirrel cage structure.

11. The compressor of any one of claims 1 to 9, wherein, The motor further comprises a wire, the wire is wound on the stator tooth, and the material of the wire comprises aluminum.

12. A refrigeration appliance characterized in that, A compressor comprising any one of claims 1 to 11.

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