CN113872349B

CN113872349B - Stator structure, motor structure, compressor structure and refrigeration equipment

Info

Publication number: CN113872349B
Application number: CN202111198763.8A
Authority: CN
Inventors: 李宏涛; 于岚; 邱小华
Original assignee: Guangdong Meizhi Compressor Co Ltd
Current assignee: Guangdong Meizhi Compressor Co Ltd
Priority date: 2021-10-14
Filing date: 2021-10-14
Publication date: 2023-01-31
Anticipated expiration: 2041-10-14
Also published as: JP2024535606A; WO2023060830A1; KR20240074868A; CN113872349A

Abstract

The embodiment of the invention provides a stator structure, a motor structure, a compressor structure and refrigeration equipment, wherein the stator structure comprises: a stator core including a stator yoke and a plurality of stator teeth extending radially inward from the stator yoke; the first groove is arranged on the side wall of one side of the stator yoke, which is far away from the axis of the stator core; the second groove is arranged in the first groove and extends from the groove bottom of the first groove to the axis of the stator core; wherein the second groove comprises: the stator core comprises a first groove and a second groove which are arranged at intervals along the circumferential direction of the stator core, and the projection area of the first groove is different from that of the second groove on the end face of the stator core. According to the technical scheme, the motor noise can be greatly improved, and particularly, the high-frequency carrier noise is greatly reduced.

Description

Stator structure, motor structure, compressor structure and refrigeration plant

Technical Field

The invention relates to the technical field of motors, in particular to a stator structure, a motor structure, a compressor structure and refrigeration equipment.

Background

The current motor often generates noise due to improper design during operation, and particularly the high-frequency noise of the modulated wave of the input current is obvious.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art or the related art.

In view of this, embodiments of the first aspect of the present invention provide a stator structure.

Embodiments of a second aspect of the invention provide an electric machine structure.

Embodiments of a third aspect of the present invention provide a compressor structure.

Embodiments of a fourth aspect of the present invention provide a refrigeration apparatus.

In order to achieve the above object, an embodiment of a first aspect of the present invention provides a stator structure including: a stator core including a stator yoke and a plurality of stator teeth extending radially inward from the stator yoke; the first groove is arranged on the side wall of one side of the stator yoke, which is far away from the axis of the stator core; the second groove is arranged in the first groove and extends from the bottom of the first groove to the axis of the stator core; wherein the second groove comprises: the stator core comprises a first groove and a second groove which are arranged at intervals along the circumferential direction of the stator core, and the projection area of the first groove is different from that of the second groove on the end face of the stator core.

According to the stator structure provided by the embodiment of the first aspect of the present invention, the stator core and the two types of grooves, specifically the first groove and the second groove, disposed on the stator core need to be supplemented that the stator core itself includes two types of conventional structures, namely, a stator yoke and stator teeth, and the stator teeth are disposed on the radial inner side of the stator yoke, that is, the stator yoke extends radially inward to form the stator teeth. And for first recess and second recess, first recess is as the trough-shaped basis, by the lateral wall of stator yoke, also keeps away from the inside sunken formation of one side lateral wall of stator core's axis promptly, and the second recess then continues inwards sunken on the basis of first recess, also the second recess extends towards stator core's axis by the tank bottom of first recess to form the superimposed setting scheme of two-layer recess, and then can play the inhibiting action to the noise on the one hand, on the other hand still can guarantee motor efficiency.

Further, the second recess mainly includes two kinds of grooves, the shape in two kinds of grooves is different, specifically for projection outline line is different on stator core's terminal surface, the interval sets up between first groove and the second groove simultaneously, because not communicate between first groove and the second groove, mutually independent, so that different first groove and second groove can combine together with first recess respectively and form different groove structures, and then the high frequency carrier noise that the improvement that can be very big appears at the operation in-process under the combined action of first groove and second recess. The projection area of the first groove and the projection area of the second groove corresponding to the second groove are limited to be different, so that the noise of the motor can be greatly improved, and particularly, the high-frequency carrier noise is greatly reduced.

Wherein, the thickness of the stator yoke is the size of the stator yoke in the radial direction of the stator core.

The depth of the first groove is the size extending inwards from the outer edge of the stator core along the radial direction.

Further, since the second groove is formed to extend inward on the basis of the first groove, the groove width of the second groove is generally not larger than the groove width of the first groove.

In the above technical solution, the projected area SA of the first groove, the number Q of the stator teeth, the thickness y of the stator yoke, and the outer diameter D of the stator core satisfy the following relationship:

in the technical scheme, the projection area of the first groove is limited, specifically, the projection area SA of the first groove, the number Q of the stator teeth, the thickness y of the stator yoke and the outer diameter D of the stator core are calculated through the formula, and the calculated proportional value is limited between 0.157 and 0.785, so that the requirement for weakening high-frequency carrier noise in the operation process can be greatly met, and the noise reduction effect is achieved.

In the above technical solution, the projected area SB of the first slot, the number Q of the stator teeth, the thickness y of the stator yoke, and the outer diameter D of the stator core satisfy the following relationship:

in the technical scheme, the projection area of the first slot is limited, specifically, the projection area SB of the first slot, the number Q of the stator teeth, the thickness y of the stator yoke and the outer diameter D of the stator core are calculated through the formula, and the calculated proportional numerical value is limited between 0.052 and 0.3925, so that the requirement for weakening high-frequency carrier noise in the operation process can be greatly met, and the noise reduction effect is achieved.

In the above technical solution, the projected area SC of the second slot, the number Q of the stator teeth, the thickness y of the stator yoke, and the outer diameter D of the stator core satisfy the following relationship:

in the technical scheme, the projection area of the second slot is limited, specifically, the projection area SB of the second slot, the number Q of the stator teeth, the thickness y of the stator yoke and the outer diameter D of the stator core are calculated through the formula, and the calculated proportional value is limited between 0.052 and 0.3925, so that the requirement for weakening high-frequency carrier noise in the operation process can be greatly met, and the noise reduction effect is achieved.

Among the above-mentioned technical scheme, first groove is the rectangular channel, and the second groove is the arc wall.

In this technical scheme, through restricting that first groove is the rectangular channel, the second groove is the arc wall, adopts conventional structure more to be convenient for manufacturing.

In the above technical solution, the number of the first slots is not less than an odd number of 3 and/or the number of the second slots is not less than an odd number of 3.

In the technical scheme, the number of at least one of the first groove and the second groove is limited to be not less than three and is an odd number, so that the normal motor efficiency in work is ensured. It will be appreciated that the sum of the number of first grooves and second grooves is equal to the number of first grooves.

In a specific embodiment, the first slots are rectangular slots, the number of which is three, the second slots are arc-shaped slots, and the number of the second slots is Q-3.

In the technical scheme, the first slots are uniformly arranged along the circumferential direction of the stator core; and/or the second slots are uniformly arranged along the circumferential direction of the stator core.

In this technical scheme, through restricting at least one in first groove and the second groove and evenly set up on stator core to produce comparatively even magnetic field, more do benefit to the rotation of drive rotor structure.

Of course, if the first slot and the second slot are uniformly arranged on the stator core, the driving effect on the rotor structure can be greatly improved, and the overall motor efficiency of the motor structure is also improved.

Among the above-mentioned technical scheme, stator core specifically includes: and the stator punching sheets are arranged in a stacked mode along the axial direction of the stator core.

In the technical scheme, the stator core is formed by axially laminating a plurality of stator punching sheets, each stator punching sheet is provided with a stator yoke, stator teeth and a winding slot, the stator teeth are arranged on the stator yokes, and the winding slots are formed between every two adjacent stator teeth, so that stator windings are wound on the winding slots, and a magnetic field can be generated on a rotor to realize the effect of the stator.

Furthermore, the stator punching sheet is made of silicon steel sheets or other soft magnetic materials, and the thickness of the stator punching sheet is not larger than 0.35mm.

According to a second aspect of the present invention, there is provided a motor structure, including the stator structure in any one of the above embodiments; the rotor structure is coaxial with the stator structure, and the rotor structure comprises a rotor core and a permanent magnet arranged on the rotor core.

The motor structure provided by the invention comprises a stator structure and a rotor structure, wherein for a stator core, when the stator teeth are wound to arrange the stator winding in the winding slot, the normal magnetic field driving effect can be realized on the rotor structure, and the rotation of the rotor structure is further realized. Specifically, rotor structure and stator structure coaxial setting mainly include two parts of rotor core and permanent magnet, and when stator structure circular telegram produced vector magnetic field, the magnetic part can take place to rotate under the magnetic action to realize rotor structure's removal.

It should be noted that the axis of the stator core is collinear with the axis of the rotor core, and the stator teeth and permanent magnets are all arranged around the axis, and are generally uniformly arranged.

In the technical scheme, on the end face of the rotor core, the projection contour lines of the permanent magnets are symmetrical about the central axis of two adjacent stator teeth; wherein, the permanent magnet comprises one or the combination of the following components: straight line segment and curve segment.

In the technical scheme, the cross section of the permanent magnet is limited to be in a symmetrical figure so as to facilitate processing and installation, specifically, the permanent magnet comprises any combination of three shapes and can be a pure straight line segment, and at the moment, the projection contour line of the permanent magnet is perpendicular to the central axis under the condition of symmetry limitation. In another case, the permanent magnet may be a symmetrical straight line segment, or may be understood as a broken line segment, in which case the projection of the contour line is more likely, including but not limited to V-shape, W-shape, and the like. In another case, the permanent magnet is a pure curved segment, and at this time, the permanent magnet still needs to keep a symmetrical shape, and can be a single arc or a combined shape of multiple arcs.

Of course, a combination of curved and straight line segments is also possible, as long as it is a symmetrical structure.

In the above technical solution, the relationship between the number Q of the stator teeth, the number p of the pole pairs of the permanent magnets, and the number m of the phases of the motor structure is:

in the technical scheme, the number of the stator teeth is limited to be not more than 2 times of the product of the pole pair number of the rotor and the phase number of the motor, so that the integral fractional slot motor can be formed, the high-order harmonic potential generated by non-sinusoidal distribution of a magnetic pole magnetic field can be effectively weakened under the action of the fractional slot motor, and the amplitude of the tooth harmonic potential can be weakened to improve the waveform. In addition, the motor with the fractional slot shape is adopted, so that the pulse vibration amplitude of the magnetic flux can be effectively reduced, and the pulse vibration loss on the surface of the magnetic pole is further reduced.

An embodiment of a third aspect of the present invention provides a compressor structure comprising: a housing; the motor structure according to the second aspect is provided in the housing.

According to the compressor structure provided by the embodiment of the third aspect of the present invention, the compressor structure includes a housing and a motor structure disposed in the housing, and the motor structure in the second aspect is disposed in the compressor structure, so that the compressor structure has the beneficial effects of the motor structure, and details are not repeated herein.

An embodiment of a fourth aspect of the present invention provides a refrigeration apparatus comprising: a box body; the compressor according to the third aspect is provided in the casing.

According to the refrigeration equipment provided by the embodiment of the fourth aspect of the present invention, the refrigeration equipment includes a box body and a compressor structure disposed in the box body, and the compressor structure in the third aspect is disposed in the refrigeration equipment, so that the refrigeration equipment has the beneficial effects of the compressor structure, and details are not repeated herein.

The refrigeration device includes, but is not limited to, a refrigerator, an ice chest, an air conditioner, and other devices having a refrigeration function.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

FIG. 1 illustrates a structural schematic diagram of a stator structure according to one embodiment of the present invention;

fig. 2 shows a structural schematic diagram of a motor structure according to an embodiment of the present invention;

fig. 3 shows a schematic structural view of a stator core according to an embodiment of the present invention;

FIG. 4 illustrates a schematic structural view of a rotor core according to one embodiment of the present invention;

fig. 5 shows a structural schematic of a motor structure according to an embodiment of the invention;

FIG. 6 shows a schematic structural diagram of a compressor configuration according to an embodiment of the present invention;

fig. 7 shows a schematic configuration of a refrigeration device according to an embodiment of the invention.

Wherein, the correspondence between the reference numbers and the component names in fig. 1 to 7 is:

100: a motor structure; 102: a stator structure; 1022: a stator core; 1023: a stator yoke; 1024: stator teeth; 1026: a first groove; 1030: a second groove; 1031: a first groove; 1032: a second groove; 1034: stator punching sheets; 104: a rotor structure; 1042: a rotor core; 1044: a permanent magnet; 1046: rotor punching sheets; 200: a compressor structure; 202: a housing; 300: a refrigeration device; 302: a box body.

Detailed Description

In order that the above objects, features and advantages of the embodiments of the present invention can be more clearly understood, embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, however, embodiments of the present invention may be practiced in other ways than those described herein, and therefore the scope of the present application is not limited to the specific embodiments disclosed below.

Some embodiments according to the invention are described below with reference to fig. 1 to 7.

Example one

As shown in fig. 1 and 2, the stator structure 102 of the present embodiment includes a stator core 1022 and two types of grooves, specifically a first groove 1026 and a second groove 1030, disposed on the stator core 1022, and it is added that the stator core 1022 itself includes two types of conventional structures, i.e., a stator yoke 1023 and stator teeth 1024, and the two types of conventional structures are located at a position relationship between the stator teeth 1024 and the stator yoke 1023, that is, the stator yoke 1023 extends radially inward to form the stator teeth 1024. For the first concave groove 1026 and the second concave groove 1030, the first concave groove 1026 is used as a groove-shaped base and is formed by inward sinking of the outer side wall of the stator yoke 1023, namely, the side wall of the side far away from the axis of the stator core 1022, the second concave groove 1030 is continuously inward sinking on the basis of the first concave groove 1026, namely, the second concave groove 1030 extends from the groove bottom of the first concave groove 1026 to the axis of the stator core 1022, so that a setting scheme of superposing two layers of concave grooves is formed, the noise can be suppressed, and the motor efficiency can be ensured.

Further, second recess 1030 mainly includes two kinds of grooves, the shape of two kinds of grooves is different, specifically for the projection outline is different on stator core's terminal surface, simultaneously the interval sets up between first groove 1031 and the second groove 1032, because not communicate between first groove 1031 and the second groove 1032, mutual independence, so that different first groove 1031 and second groove 1032 can combine together with first groove respectively and form different groove structures, and then the high frequency carrier noise that the improvement appears at the operation in-process that can be very big under the combined action of first groove and second recess 1030. By limiting the difference between the projected areas of the first and

second slots

1031, 1032 corresponding to the second recess 1030, the motor noise can be greatly improved, and particularly, the high-frequency carrier noise can be greatly reduced.

Here, the thickness of the stator yoke 1023 is the dimension of the stator yoke 1023 in the radial direction of the stator core 1022.

The depth of the first recess 1026 is defined as the dimension extending radially inward from the outer edge of the stator core 1022.

Further, since the second groove 1030 is formed to extend inward on the basis of the first groove 1026, generally, the width of the second groove 1030 is not greater than the width of the first groove 1026.

Further, as shown in fig. 3, the stator core 1022 is formed by axially stacking a plurality of stator laminations 1034, each stator lamination 1034 is provided with a stator yoke, stator teeth and a winding slot, the stator teeth are disposed on the stator yoke, and the winding slot is formed between two adjacent stator teeth, so that the stator winding is wound on the winding slot, and a magnetic field can be generated to the rotor to realize a stator action.

Further, the material of the stator punching sheet 1034 is selected from a silicon steel sheet or other soft magnetic material sheet, and the thickness is not more than 0.35mm.

In a specific embodiment, the projected area SA of the first groove and the number Q of stator teeth, the thickness y of the stator yoke and the outer diameter D of the stator core satisfy the following relationship:

through limiting the projection area of the first groove, specifically, the projection area SA of the first groove, the number Q of the stator teeth, the thickness y of the stator yoke and the outer diameter D of the stator core are calculated through the formula, and the calculated proportional value is limited between 0.157 and 0.785, so that the requirement for weakening high-frequency carrier noise in the operation process can be greatly met, and the noise reduction effect is achieved.

In a specific embodiment, the projected area SB of the first slots and the number Q of stator teeth, the thickness y of the stator yoke and the outer diameter D of the stator core satisfy the following relationship:

through limiting the projection area of the first groove, specifically, calculating the projection area SB of the first groove, the number Q of the stator teeth, the thickness y of the stator yoke and the outer diameter D of the stator core through the formula, and limiting the calculated proportional numerical value between 0.052 and 0.3925, the requirement for weakening high-frequency carrier noise in the operation process can be greatly met, and the noise reduction effect is achieved.

In a specific embodiment, the projected area SC of the second slots and the number Q of stator teeth, the thickness y of the stator yoke and the outer diameter D of the stator core satisfy the following relationship:

through limiting the projection area of the second groove, specifically, the projection area SB of the second groove, the number Q of the stator teeth, the thickness y of the stator yoke and the outer diameter D of the stator core are calculated through the formula, and the calculated proportional numerical value is limited between 0.052 and 0.3925, so that the requirement for weakening high-frequency carrier noise in the operation process can be greatly met, and the noise reduction effect is achieved.

Example two

As shown in fig. 1 and 2, the stator structure 102 of the present embodiment includes a stator core 1022 and two types of grooves, specifically a first groove 1026 and a second groove 1030, disposed on the stator core 1022, and it is added that the stator core 1022 itself includes two types of conventional structures, i.e., a stator yoke 1023 and stator teeth 1024, and the two types of conventional structures are located at a position relationship between the stator teeth 1024 and the stator yoke 1023, that is, the stator yoke 1023 extends radially inward to form the stator teeth 1024. For the first and

second grooves

1026, 1030, the first groove 1026 is formed by an outer side wall of the stator yoke 1023, i.e., a side wall far away from the axis of the stator core 1022, which is recessed inwards, and the second groove 1030 is formed by continuing to recess inwards on the basis of the first groove 1026, i.e., the second groove 1030 extends from the bottom of the first groove 1026 towards the axis of the stator core 1022, so that a two-layer groove-overlapping arrangement scheme is formed, and therefore, on one hand, the noise can be suppressed, and on the other hand, the motor efficiency can be ensured.

Further, second recess 1030 mainly includes two kinds of grooves, the shape of two kinds of grooves is different, specifically for the projection outline line is different on stator core's terminal surface, the interval sets up between first groove 1031 and the second groove 1032 simultaneously, because do not communicate between first groove 1031 and the second groove 1032, mutual independence, so that different first groove 1031 and second groove 1032 can combine together with first groove respectively and form different groove structures, and then the high frequency carrier noise that can very big improvement appear in the operation under the combined action of first groove and second recess 1030. By limiting the difference between the projected areas of the first slots 1031 and the second slots 1032 corresponding to the second recesses 1030, the motor noise can be greatly improved, and particularly, the high-frequency carrier noise can be greatly reduced.

In one embodiment, the first slots 1031 are rectangular slots and the second slots 1032 are arcuate slots, which are more convenient to manufacture and manufacture using conventional configurations.

In a specific embodiment, the number of the first slots 1031 is not less than three and is an odd number to ensure normal motor efficiency in operation.

In another specific embodiment, the number of the second slots 1032 is not less than three and is an odd number to ensure normal motor efficiency in operation.

Furthermore, the first grooves are rectangular grooves, the number of the first grooves is three, the number of the second grooves is arc-shaped, and the number of the second grooves is Q-3.

It is understood that the sum of the numbers of the first and

second slots

1031, 1032 is equal to the number of the first recesses.

Further, the number of the first and

second slots

1031 and 1032 is not less than three.

At least one of the first slots 1031 and the second slots 1032 is uniformly arranged on the stator core, so as to generate a uniform magnetic field, which is more beneficial to driving the rotation of the rotor structure.

Of course, if the first slots 1031 and the second slots 1032 are uniformly disposed on the stator core, the driving effect on the rotor structure can be greatly improved, and the overall motor efficiency of the motor structure can also be improved.

EXAMPLE III

Further, second recess 1030 mainly includes two kinds of grooves, the shape of two kinds of grooves is different, specifically for the projection outline line is different on stator core's terminal surface, the interval sets up between first groove 1031 and the second groove 1032 simultaneously, because do not communicate between first groove 1031 and the second groove 1032, mutual independence, so that different first groove 1031 and second groove 1032 can combine together with first groove respectively and form different groove structures, and then the high frequency carrier noise that can very big improvement appear in the operation under the combined action of first groove and second recess 1030. By limiting the difference between the projected areas of the first and

second slots

More specifically, as shown in fig. 2, the groove a (i.e., first groove) area SA, the groove B (i.e., first groove) area SB, the groove C (i.e., second groove) area SC, the stator outer diameter D, the stator yoke thickness y, and the stator groove number Q satisfy the formula: q multiplied by SA/(yD-y 2) is more than or equal to 0.157 and less than or equal to 0.785; q multiplied by SB/(yD-y 2) is more than or equal to 0.052 and less than or equal to 0.3925; q multiplied by SC/(yD-y 2) is more than or equal to 0.052 and less than or equal to 0.052; SB is not equal to SC; the groove a area SA, unit mm2, groove B area SB, unit mm2, groove C area SC, unit mm2, stator outer diameter D, unit mm, stator yoke thickness y, unit mm. The invention can improve the high-frequency carrier noise of the motor and the compressor.

Example four

As shown in fig. 5, the motor structure 100 according to the present embodiment includes two parts, namely a stator structure 102 and a rotor structure 104, where the stator structure 102 is the structure mentioned in any of the above embodiments, and for the stator core 1022, when the stator teeth 1024 are wound to provide stator windings in the winding slots, a normal magnetic field driving effect can be performed on the rotor structure 104, so as to achieve rotation of the rotor structure 104. Specifically, the rotor structure 104 and the stator structure 102 are coaxially arranged, and mainly include two parts, namely a rotor core 1042 and a permanent magnet 1044, and when the stator structure 102 is electrified to generate a vector magnetic field, the magnetic member can rotate under the magnetic action, so that the movement of the rotor structure 104 is realized.

It should be noted that the axis of the stator core 1022 is collinear with the axis of the rotor core 1042, and the stator teeth 1024 and the permanent magnets 1044 are disposed around the axis, and are generally uniformly arranged.

Further, the cross-sectional shape of the permanent magnet 1044 belongs to a symmetrical pattern so as to facilitate processing and installation, specifically, the permanent magnet 1044 includes any combination of three shapes, which may be a pure straight line segment, and at this time, in the case of restricting symmetry, the projection contour line of the permanent magnet 1044 should be perpendicular to the central axis. In another case, the permanent magnet 1044 can be a symmetrical straight line segment or can be understood as a broken line segment, and the possibility of projecting the contour line is high, including but not limited to V-shape, W-shape, and the like. In another case, the permanent magnet 1044 is a pure curved segment, and at this time, a symmetrical shape still needs to be maintained, which may be a single arc or a combination of multiple arcs.

Further, the relationship between the number Q of stator teeth 1024 and the number p of pole pairs of permanent magnets and the number m of phases of the motor structure 100 is:

the number of the stator teeth 1024 is limited to be not more than 2 times of the product of the pole pair number of the rotor and the phase number of the motor, so that the integral fractional slot motor can be formed, and under the action of the fractional slot motor, the high-order harmonic potential generated by the non-sinusoidal distribution of the magnetic field of the magnetic pole can be effectively weakened, and meanwhile, the amplitude of the tooth harmonic potential can be weakened, and the waveform can be improved. In addition, the motor with the fractional slot shape is adopted, so that the pulse vibration amplitude of the magnetic flux can be effectively reduced, and the pulse vibration loss on the surface of the magnetic pole is further reduced.

Further, as shown in fig. 4, the rotor core is formed by axially stacking a plurality of rotor sheets 1046, the rotor sheets 1046 are made of silicon steel sheets or other soft magnetic materials, and the thickness of the rotor sheets is not greater than 0.35mm.

Further, the length of the rotor core 1042 is greater than or equal to the length of the stator core 1022.

Further, the number Q of stator slots is not less than 6.

Further, the number p of pole pairs of the rotor is more than or equal to 2.

Further, the number of stator slots, the number of rotor poles and the number of motor phases meet the following requirements: q/2mp is woven into (1).

Further, the winding is composed of enameled wires.

Further, the stator core 1022 and the rotor core are formed by laminating silicon steel sheets.

EXAMPLE five

As shown in fig. 6, a compressor structure 200 provided in this embodiment includes a housing 202 and a motor structure 100 disposed in the housing 202, and the motor structure 100 in any of the embodiments is disposed in the housing 202, so that the compressor structure has the beneficial effects of the motor structure 100, and details thereof are not repeated herein.

Example six

As shown in fig. 7, the refrigeration apparatus 300 according to the present embodiment includes a box 302 and a compressor structure 200 disposed in the box 302, and the refrigeration apparatus 300 is provided with the compressor structure 200 according to the fifth embodiment, so that the refrigeration apparatus has the beneficial effects of the compressor structure 200, and details are not repeated herein.

The refrigeration device 300 includes, but is not limited to, a refrigerator, an ice chest, an air conditioner, and other devices having a refrigeration function.

According to the stator structure, the motor structure, the compressor structure and the refrigeration equipment provided by the invention, the motor noise can be greatly improved, and particularly, the high-frequency carrier noise is greatly reduced.

In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or unit referred to must have a specific direction, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention.

In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The present invention has been described in terms of the preferred embodiment, and it is not intended to be limited to the embodiment. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A stator structure, comprising:

a stator core including a stator yoke and a plurality of stator teeth extending radially inward from the stator yoke;

the first groove is arranged on the side wall of one side of the stator yoke, which is far away from the axis of the stator core;

the second groove is arranged in the first groove, and extends from the groove bottom of the first groove to the axis of the stator core;

wherein the second groove comprises: the stator comprises a stator core, a first groove and a second groove which are arranged at intervals along the circumferential direction of the stator core, wherein the projection area of the first groove is different from the projection area of the second groove on the end surface of the stator core;

the projected area SA of the first groove, the number Q of the stator teeth, the thickness y of the stator yoke and the outer diameter D of the stator iron core satisfy the following relations:

2. the stator structure according to claim 1,

the projected area SB of the first slots and the number Q of the stator teeth, the thickness y of the stator yoke, and the outer diameter D of the stator core satisfy the following relationship:

3. the stator structure according to claim 1, wherein a projected area SC of the second slot satisfies the following relationship with the number Q of the stator teeth, the thickness y of the stator yoke, and the outer diameter D of the stator core:

4. the stator structure according to any one of claims 1 to 3, wherein the first slot is a rectangular slot and the second slot is an arcuate slot.

5. The stator structure according to any one of claims 1 to 3,

the number of the first grooves is not less than an odd number of 3; and/or

The number of the second grooves is an odd number not less than 3.

6. The stator structure according to any one of claims 1 to 3,

the first slots are uniformly arranged along the circumferential direction of the stator core; and/or

The second slots are uniformly arranged along the circumferential direction of the stator core.

7. The stator structure according to any one of claims 1 to 3, wherein the stator core includes a plurality of stator laminations, and the plurality of stator laminations are stacked in an axial direction of the stator core.

8. An electric machine construction, comprising:

the stator structure of any one of claims 1 to 7;

the rotor structure, with the coaxial setting of stator structure, the rotor structure includes rotor core and locates permanent magnet on the rotor core.

9. The electric machine structure according to claim 8, characterized in that on the end face of the rotor core, the projected contour line of the permanent magnet is symmetrical with respect to the central axis of two adjacent stator teeth;

wherein the permanent magnet comprises one or a combination of the following: straight line segments and broken line segments.

10. The electric machine structure according to claim 8, wherein on the end face of the rotor core, the projected contour line of the permanent magnet is symmetrical with respect to the central axis of two adjacent stator teeth;

wherein the permanent magnet comprises a curved segment.

11. The motor structure of claim 8,

the relationship between the number Q of stator teeth in the stator structure, the number p of permanent magnets and the number m of phases of the motor structure is as follows:

12. a compressor structure, comprising:

a housing;

the electric machine structure of any of claims 8 to 11, disposed within the housing.

13. A refrigeration apparatus, comprising:

a box body;

the compressor structure of claim 12, disposed within said tank.