CN107733201A - Moving-magnetic linear vibration motor and linear compressor - Google Patents

Abstract

The invention relates to a moving magnet linear oscillating motor and a linear compressor, comprising: an upper frame, a lower frame, an outer stator fixing part arranged between the upper frame and the lower frame, and a fixing part fixed on the outer stator fixing part The outer stator group, the inner stator arranged in the inner cavity of the outer stator group, and the mover arranged between the outer stator group and the inner stator. The outer stator group includes two sets of outer stators arranged axially; the outer stator includes an outer stator core and a winding embedded in a coil slot of the outer stator core; the outer stator core, the inner stator, and the mover are coaxially arranged; and The outer stator core is assembled from a number of small stator cores arranged in a circular array; the small stator core is a spiral C-shaped structure. The invention overcomes the defects of long distance between the two outer stator iron cores and waste of permanent magnet materials in the traditional double-stator transverse flux linear oscillation motor, reduces the axial length of the permanent magnet and the mover, and makes the motor The structure is more compact, and the utilization rate of the permanent magnet is high.

Description

Moving magnet linear oscillating motor and linear compressor

technical field

The invention relates to the technical field of special motors, in particular to the technical field of compressors, in particular to a moving magnet linear oscillating motor and a linear compressor.

Background technique

At present, the compressors used in refrigeration equipment such as refrigerators and air conditioners are still mostly rotary compressors. This type of compressor is driven by a traditional rotary motor, and the crank-link mechanism is used to convert the rotary motion into the reciprocating motion of the piston. Due to structural limitations, this compressor has disadvantages such as high frictional resistance and low efficiency, and it is difficult to improve its performance. The linear compressor uses a linear motor to directly drive the piston for reciprocating drive, which can save the crank connecting rod mechanism, reduce friction loss, and improve system efficiency. It is expected to become a replacement product for the existing rotary refrigeration compressor.

LG Corporation of South Korea discloses a linear compressor in the Chinese patent application number CN200880112785.4. The longitudinal section view of the compressor structure is shown in Figure 8. The linear oscillating motor used in it is mainly composed of the following structures: stator Windings, outer stator core, inner stator core, permanent magnets, permanent magnet holders, pistons, resonant springs. The motor mover consists of permanent magnets and non-magnetic permanent magnet brackets. The stator winding is a cake winding, embedded in the outer stator core of the "C" structure. Since the main magnetic circuit of the motor is parallel to the moving direction of the mover, it is determined that the inner stator core must be a radial structure with inner tightness and outer looseness. The motor has a compact structure, reduces friction loss, and has high mechanical efficiency. However, it is difficult to stack the silicon steel punched sheets of the inner stator with a radial structure, and processing is difficult, which increases the processing cost. In addition, since the thickness of the silicon steel punches that make up the inner stator is uniform, there must be gaps between the silicon steel punches on the outer circumference of the inner stator, which will increase the reluctance and reduce the efficiency of the motor.

Chinese patent application numbers 200610052853.5 and 201020199357.4 disclose two kinds of moving magnet transverse flux linear oscillation motors. The outer stators of both adopt double stator structure, as shown in Figure 9 and Figure 10, each outer stator iron The structure of the core is similar to the structure of the salient pole stator core of the DC brushless motor, and the stator winding is a concentrated winding and embedded in the tooth slot of the outer stator core. The motor mover mainly includes: permanent magnets, permanent magnet brackets and pistons. Compared with LG's linear compressor technology, these two patented linear oscillating motors use a transverse flux motor structure, that is, the main magnetic circuit is perpendicular to the moving direction of the mover, so the inner and outer stator cores are made of The silicon steel punches with the same thickness are arranged and stacked along the axial direction, instead of the radial structure of tight inside and loose outside, which makes the processing and installation process of this motor the same as that of ordinary rotating motors. It has the advantages of convenient installation and manufacturing, simple structure, magnetic It has the advantages of small resistance, but also has disadvantages. Since the stator winding coil exposes the two ends of the outer stator core, there needs to be a space between the two outer stator cores to accommodate the exposed part of the winding. In order to correspond to the structural size of the outer stator, a section of the same length should be reserved for the permanent magnet on the mover. Electromagnetic analysis shows that the permanent magnet in this section does not participate in the generation of electromagnetic force, and belongs to the redundant structure, so this structure has the following disadvantages: it causes waste of materials such as permanent magnets and inner stators, and the utilization rate of permanent magnet materials is low; According to the principle of mechanical vibration, the stiffness of the resonant spring of the compressor will increase correspondingly, which increases the manufacturing cost; the distance between the outer stator and the large distance makes it difficult to reduce the length and volume of the body; it will cause the permanent magnet at the interval Larger flux leakage is generated, which affects the distribution of magnetic field lines.

Contents of the invention

The first object of the present invention is to provide a moving magnet linear oscillating motor to solve the technical problem of avoiding the defects caused by the large distance between the outer stators.

The second object of the present invention is to provide a linear compressor to solve the technical problem of avoiding the defects caused by the large distance between the outer stators in the motor of the compressor.

The moving magnet type linear oscillating motor of the present invention is realized like this:

A moving magnet linear oscillating motor is characterized in that it comprises:

The upper frame, the lower frame, the outer stator fixing part arranged between the upper frame and the lower frame, the outer stator group fixed on the outer stator fixing part, and the inner cavity of the outer stator group The inner stator in the middle, and the mover arranged between the outer stator group and the inner stator; wherein

The outer stator group includes two sets of outer stators arranged axially; the outer stator includes an outer stator core and a winding embedded in a coil slot of the outer stator core;

The outer stator core, the inner stator and the mover are coaxially arranged; and

The outer stator core is assembled from a number of small stator cores arranged in a circular array; the small stator core is a spiral C-shaped structure, and the two ends of the spiral C-shaped small stator core are parallel and are staggered by a certain distance from each other, and the end faces of the two ends of the opposite parts of the small stator cores constituting the two sets of outer stators are flush and coplanar.

Further, the small stator core is connected by the upper stator and the lower stator to form a helical C-shaped structure, and the helical C-shaped structure has coil slots suitable for embedding windings therein;

Both the upper stator and the lower stator respectively include a base and wings connected to the base;

The base of the upper stator is attached to the base of the lower stator; and

The wings of the upper stator and the wings of the lower stator respectively constitute the two ends of the spiral C-shaped small stator core.

Further optionally, the helical directions of the helical C-shaped small stator cores constituting the two sets of the outer stators are the same, and the winding directions of the windings in the coil slots of the helical C-shaped small stator cores are opposite; and

The windings in the coil slots of the spiral C-shaped small stator cores of the two sets of outer stators are connected in series or in parallel.

Further optionally, the helical directions of the helical C-shaped small stator cores constituting the two sets of the outer stators are opposite, and the winding directions of the windings in the coil slots of the helical C-shaped small stator cores are the same; and

The windings in the coil slots of the spiral C-shaped small stator cores of the two sets of outer stators are connected in series or in parallel.

Further, the winding is a pie winding.

Further, the mover at least includes a permanent magnet ring and a permanent magnet bracket for installing the permanent magnet ring;

The permanent magnet bracket is located between the outer stator core and the inner stator, and is arranged coaxially with the outer stator core and the inner stator;

The permanent magnet ring is composed of multiple tile-shaped magnetic tiles; the magnetic tiles are magnetized along the radial direction, and the magnetization directions of every two adjacent magnetic tiles are opposite; and

The number of magnetic tiles is the same as the number of magnetic poles of the outer stator core, and the positions are aligned one by one.

Further, the inner stator is formed by stacking stator punches with uniform thickness along the axial direction of the motor.

Linear compressor of the present invention is realized like this:

A linear compressor, comprising the moving magnet linear oscillating motor, a gas compression mechanism installed in the middle of the moving magnet linear oscillating motor, and a resonant spring assembly installed in the lower end of the moving magnet linear oscillating motor ;in

The moving magnet linear oscillating motor comprises an upper frame, a lower frame, an outer stator fixing part arranged between the upper frame and the lower frame, an outer stator group fixed on the outer stator fixing part, an inner stator arranged in the inner cavity of the outer stator group, and a mover arranged between the outer stator group and the inner stator; and

The gas compression mechanism is connected and assembled on the upper frame, and the gas compression mechanism is arranged coaxially with the outer stator core and the inner stator;

The resonant spring assembly is connected and assembled on the lower frame.

Further, the gas compression mechanism includes a cylinder fixedly connected to the upper frame, a piston disposed in the cylinder, and an end cap for closing the upper end of the cylinder; wherein

The cylinder is equipped with a valve group, and the valve group includes an intake valve and an exhaust valve;

The outer ring of the upper end of the piston is provided with several piston ring grooves, and piston rings are arranged in the piston ring grooves; a plurality of annular sealing teeth are arranged between every two piston ring grooves.

Further, the resonant spring assembly is composed of several resonant springs;

The resonant spring assembly is connected and fixed to the mover of the moving magnet linear oscillating motor, and the resonant spring assembly and the mover form a resonant system, namely

When the electromagnetic excitation frequency of the moving magnet linear oscillating motor is consistent with the natural frequency of the resonant system, a small electromagnetic excitation can excite the moving subsystem to perform a large-amplitude resonant motion.

The beneficial effects of the present invention are: the moving magnet linear oscillating motor and linear compressor of the present invention, compared with the traditional rotary compressor, saves the crank connecting rod transmission mechanism, reduces friction loss, and has high mechanical efficiency.

In addition, by using stacked small stator cores to form the outer stator core, it overcomes the shortcomings of the long distance between the two outer stator cores and the waste of permanent magnet materials in the traditional double-stator transverse flux linear oscillation motor, reducing the The axial length of the permanent magnet and the mover is reduced, making the structure of the motor more compact, the utilization rate of the permanent magnet is high, the usage of the permanent magnet is saved, the mass of the mover is reduced, and the stiffness of the resonance spring and the weight of the whole machine are reduced. size and weight.

Furthermore, the inner stator is made of stator punches with uniform thickness arranged and stacked along the axial direction of the motor, which solves the problem that the inner stator has a radial structure and is not suitable for stacking. It is easy to manufacture and process, and the motor has small magnetic resistance.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Fig. 1 is the longitudinal sectional structural diagram of the moving magnet type linear oscillation motor of embodiment 1 of the present invention;

Fig. 2 is a transverse section top view of the moving magnet linear oscillating motor according to Embodiment 1 of the present invention;

Fig. 3 is a schematic structural view of the small stator core of Embodiment 1 of the present invention;

Fig. 4 is the longitudinal sectional structural view of the moving magnet linear oscillation motor in Embodiment 2 of the present invention;

Fig. 5 is a transverse sectional structure diagram of a moving magnet linear oscillation motor in Embodiment 2 of the present invention;

Fig. 6 is a longitudinal sectional structure diagram of a linear compressor according to Embodiment 4 of the present invention;

7 is a schematic structural view of a three-arm scroll linear leaf spring according to Embodiment 4 of the present invention;

Fig. 8 is a longitudinal sectional view of the linear compressor disclosed in the document whose application number is CN200880112785.4;

Fig. 9 is a schematic longitudinal sectional view of the moving magnet transverse flux linear oscillation motor in the application number 201020199357.4.

Figure 10 is a cross-sectional view of the moving magnet transverse flux linear oscillation motor in the application number 201020199357.4.

In the figure: upper frame 100, round hole 110, upper screw hole 120, lower frame 200, lower screw hole 210, outer stator fixing part 300, outer stator core 400, small stator core 410, upper stator 411, lower stator Sub 412, distance h, base 4111, wing 4112, winding 420, inner stator 500, permanent magnet bracket 600, mover iron core 610, permanent magnet ring 620, frame bolt 700, cylinder 800, intake valve 810, row Gas valve 820, piston 900, piston ring 910, end cover 920, resonant spring 1000, bolt hole 1010.

detailed description

Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the implementation manners in the present invention, all other implementation manners obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[a1] Example 1:

As shown in Figures 1 and 2, the present invention provides a moving magnet linear oscillating motor, which is suitable for linear compressors, including: an upper frame 100 and a lower frame 200, which are arranged on the upper frame 100 and the lower frame The outer stator fixing part 300 between 200, the outer stator group fixed on the outer stator fixing part 300, the inner stator 500 arranged in the inner cavity of the outer stator group, and the moving part arranged between the outer stator group and the inner stator 500 son.

A slot for fixing the outer stator core 400 is provided on the wall of the inner cavity of the outer stator fixing member 300 in the axial direction. The outer stator fixing part 300 adopts, for example but not limited to, a cylindrical shape. According to the shape and assembly position of the outer stator core 400, a corresponding slot is cut out on the cylindrical wall of the outer stator fixing part 300, and the outer stator core 400 is installed. fixed in the slot. Then the outer stator fixing part 300 is arranged between the upper frame 100 and the lower frame 200, and the upper frame 100 and the lower frame 200 are connected to each other by fasteners (such as bolts), so that the outer stator fixing part 300 is clamped. Tight and secure.

In this embodiment, an upper screw hole 120 is provided at the edge of the upper frame 100 , and a lower screw hole 210 is provided at a position corresponding to the upper screw hole 120 at the edge of the lower frame 200 . The upper frame 100 and the lower frame 200 are fixed by frame bolts 700 passing through the upper screw holes 120 and the lower screw holes 210 . The fixing between the upper frame 100 and the lower frame 200 makes the outer stator group, mover and inner stator 500 fixedly clamped between the upper frame 100 and the lower frame 200 .

The outer stator group includes two sets of outer stators arranged axially; the outer stator includes an outer stator core 400 and a winding 420 embedded in the coil slot of the outer stator core 400; the outer stator core 400, the inner stator 500 and the mover are all coaxial setting.

The outer stator core 400 is assembled from several small stator cores 410 arranged in a circular array. The small stator core 410 is made of soft magnetic material, for example, it can be cut and laminated from silicon steel sheets, or it can be made of amorphous material sendust. The small stator core 410 is a spiral C-shaped structure, and the two ends of the spiral C-shaped small stator core 410 are parallel and staggered by a certain distance h from each other, so that the relative The end faces of the two ends of the part are flush and coplanar. Through the above-mentioned designed structure, the direction of the magnetic flux in the traditional C-shaped iron core can be transformed from parallel to the moving direction of the mover to a transverse direction of the magnetic flux, that is, the direction of the magnetic flux is perpendicular to the moving direction of the mover. In this way, the advantages of the traditional double-stator transverse flux linear oscillating motor can be retained.

Specifically, as shown in FIG. 3, the small stator core 410 is formed by butting the upper stator 411 and the lower stator 412 to form a spiral C-shaped structure. The spiral C-shaped structure has coil slots suitable for the winding 420 to be embedded therein; the upper stator 411 and the lower stator 412 each include a base 4111 and a wing 4112 connected to the base 4111; the base 4111 of the upper stator 411 and the base 4111 of the lower stator 412 fit together; and the wings 4112 of the upper stator 411 and the lower stator The wing portions 4112 of 412 respectively constitute the two ends of the spiral C-shaped small stator core 410 . Optionally, in order to improve the stability of the splicing of the upper stator 411 and the lower stator 412 , between the upper stator 411 and the lower stator 412 is provided a concavo-convex structure suitable for mutual insertion.

In this embodiment, the helical directions of the spiral C-shaped small stator cores 410 constituting two sets of outer stators are the same, and the winding directions of the windings 420 in the coil slots of the spiral C-shaped small stator cores 410 are opposite; The windings 420 in the coil slots of the helical C-shaped small stator core 410 of the stator are connected in series or in parallel.

The winding 420 in this embodiment is a pie-shaped winding 420, which is embedded in the coil slot of the spiral C-shaped small stator core 410, and the two ends of the small stator core 410 will not be exposed, so it avoids the traditional centralized winding. The distance between the two small stator cores caused by the exposure of the 420 coils is too large, the distance between the two small stator cores 410 can be set very small, and at the same time, the amount of permanent magnets used is correspondingly reduced .

The mover at least includes a permanent magnet ring 620 and a permanent magnet bracket 600 for installing the permanent magnet ring 620; in order to realize the cooperation between the mover and the inner and outer stators, the permanent magnet bracket 600 is located between the outer stator core 400 and the inner stator 500 between and coaxially arranged with the outer stator core 400 and the inner stator 500. The permanent magnetic ring 620 is composed of multiple tile-shaped magnetic tiles; the magnetic tiles are magnetized along the radial direction, and the magnetization directions of every two adjacent magnetic tiles are opposite; and the number of magnetic tiles is the same as that of the outer stator core 400 The number of magnetic poles is the same, and the positions are aligned one by one. The permanent magnet bracket 600 of this embodiment is a cup-shaped structure made of non-magnetic material, which is used to fix the permanent magnet ring 620 and other parts, and is suitable for connecting the resonant spring 1000, the piston 900 and other components. The magnetic tile of this embodiment adopts, for example but not limited to, sintered NdFeB.

The mover of this embodiment also includes a mover iron core 610, which is a cylindrical structure and is arranged on the outer surface of the permanent magnet support 600. The material of the mover iron core 610 is a soft magnetic material, and the permanent magnet ring 620 is pasted on the outer surface of the mover iron core 610. The mover iron core 610 can be made of ring-shaped silicon steel punches stacked in the axial direction, or can be made of amorphous material sendust. The mover iron core 610 in this embodiment is pasted on the outer surface of the permanent magnet bracket 600 by, for example but not limited to, high-strength glue. The permanent magnet ring 620 is pasted on the outer surface of the mover iron core 610 using, for example but not limited to, high-strength glue.

The inner stator 500 is made of stator punches with uniform thickness arranged and stacked along the axial direction of the motor, which greatly reduces the processing difficulty and cost, and at the same time reduces the magnetic resistance. The stamping sheet of the stator adopts, for example but not limited to, an annular silicon steel punching sheet.

Example 2:

Please refer to Fig. 4 and Fig. 5, the structure of this embodiment is roughly the same as that of Embodiment 1, the difference is that there is no mover iron core 610 in this embodiment, and it is directly embedded or pasted on the outer wall surface of the permanent magnet bracket 600. The magnetic tiles of the permanent magnetic ring 620, the magnetization direction and arrangement of the magnetic tiles are the same as those in the first embodiment. The longitudinal sectional structural diagram and the transverse sectional top view of the moving magnet linear oscillation motor of the second embodiment are shown in Fig. 4 and Fig. 5 .

Example 3:

The structure of this embodiment is roughly the same as that of Embodiment 1 or Embodiment 2, the difference is that in this embodiment, the helical directions of the spiral C-shaped small stator cores 410 constituting two sets of outer stators are opposite, and the spiral C-shaped small stator cores 410 are opposite in direction. The winding directions of the windings 420 in the coil slots of the iron core 410 are the same; and the windings 420 in the coil slots of the helical C-shaped small stator cores 410 of the two sets of outer stators are connected in series or in parallel.

Example 4:

As shown in Figure 6 and Figure 7, on the basis of Embodiment 1 or Embodiment 2 or Embodiment 3, this embodiment provides a linear compressor, using the moving magnet linear oscillation of Embodiment 1 or Embodiment 2 The motor, the gas compression mechanism installed in the middle of the moving magnet linear oscillating motor, and the resonant spring assembly installed in the lower end of the moving magnet linear oscillating motor.

The moving magnet linear oscillating motor comprises an upper frame 100, a lower frame 200, an outer stator fixing part 300 arranged between the upper frame 100 and the lower frame 200, an outer stator group fixed on the outer stator fixing part 300, The inner stator 500 arranged in the inner cavity of the outer stator group, and the mover arranged between the outer stator group and the inner stator 500 .

The gas compression mechanism is connected and assembled on the upper frame 100 , and the gas compression mechanism is arranged coaxially with the outer stator core 400 and the inner stator 500 ; the resonant spring assembly is connected and assembled on the lower frame 200 .

The gas compression mechanism includes a cylinder 800 fixedly connected to the upper frame 100, a piston 900 disposed in the cylinder 800, and an end cover 920 for closing the upper end of the cylinder 800; wherein the cylinder 800 is equipped with a valve group, which includes an inlet Air valve 810 and exhaust valve 820, the valve group can be arranged on the upper end of cylinder 800, can also be arranged on other parts of cylinder 800 or piston 900 according to different situations, for example, intake valve 810 is arranged on the end surface of piston 900. The permanent magnet bracket 600 is connected with one end of the piston 900 and fixed by screws. In this way, when the mover component moves, it will drive the piston 900 to reciprocate along the axis in the cylinder 800 to compress the gas, and the cylinder 800 also acts as a linear sliding bearing.

In order to ensure the airtightness between the cylinder 800 and the piston 900, two ways of sealing are adopted: piston ring seal and labyrinth seal. The outer ring of the upper end of the piston 900 is provided with several piston ring grooves, and the piston ring grooves are provided with a piston ring 910; a plurality of annular sealing teeth are arranged between every two piston ring grooves.

In order to minimize the friction loss between the cylinder 800 and the piston 900, the system adopts a self-lubricating design, and the material of the piston ring 910 is polytetrafluoroethylene, a self-lubricating material.

Specifically, a circular hole 110 for installing the cylinder 800 is provided at the center of the upper frame 100, and the cylinder 800 is fixed on the upper frame 100 by bolts and kept coaxial with the outer stator group and the inner stator 500, so that the inner stator The sub 500 is attached to the outer surface of the cylinder 800.

The resonant spring assembly is composed of several resonant springs 1000; the resonant spring assembly is connected and fixed with the mover of the moving magnet linear oscillating motor, and the resonant spring assembly and the mover form a resonant system, that is, when the electromagnetic excitation of the moving magnet linear oscillating motor When the frequency is consistent with the natural frequency of the resonant system, a small electromagnetic excitation can excite the moving subsystem to perform a resonant motion with a large amplitude. Optionally, the resonant spring assembly can be connected and fixed with the permanent magnet support 600 and the lower frame 200 by bolts respectively, and after the resonant spring 1000 is connected with the mover and the stator, the mover and the stator will not have any movement relative to the axis of symmetry. Obvious rotation. Specifically, there are two bolt holes 1010 near the center of the resonant spring 1000 for bolt connection with the permanent magnet bracket 600, and a plurality of bolt holes 1010 near the periphery of the outer ring for bolt connection with the lower frame 200. .

Optionally, the resonant spring 1000 is a three-arm vortex-shaped leaf spring; the material of the resonant spring 1000 is an alloy spring steel plate, which is cut along the vortex-shaped curve on the steel plate to divide the plate into three spring arms.

During work, the winding 420 of the outer stator core 400 of the motor is passed through an alternating current of a certain frequency, an alternating electromagnetic field is generated in the air gap between the inner stator 500 of the motor and the outer stator core 400, and the permanent magnet ring 620 is Under the action of the electromagnetic field, alternating electromagnetic thrust is generated. When the electromagnetic excitation frequency of the motor is consistent with the natural frequency of the resonance system, the resonance system generates resonance, and then pushes the piston 900 to reciprocate in a straight line along the axis of symmetry of the motor to compress the gas.

The moving magnet linear oscillating motor of the present invention has the advantages of convenient processing, compact structure, high mechanical efficiency, high utilization rate of permanent magnets, and smooth output force, and is suitable for refrigeration and gas compression fields such as refrigerator refrigeration compressors, especially for Oil-free lubricated gas compressors are required.

Inspired by the above-mentioned ideal embodiment according to the present invention, through the above-mentioned description content, relevant workers can make various changes and modifications within the scope of not departing from the technical idea of the present invention. The technical scope of the present invention is not limited to the content in the specification, but must be determined according to the scope of the claims.

In the description of the present invention, it should be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying No device or element must have a particular orientation, be constructed, and operate in a particular orientation, and therefore should not be construed as limiting the invention.

In the present invention, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , or integrated; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components or the interaction relationship between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship that is usually placed when the product of the invention is used, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying References to devices or elements must have a particular orientation, be constructed, and operate in a particular orientation and therefore should not be construed as limiting the invention. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions, and should not be construed as indicating or implying relative importance.

In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are absolutely horizontal or overhanging, but may be slightly inclined. For example, "horizontal" only means that its direction is more horizontal than "vertical", and it does not mean that the structure must be completely horizontal, but can be slightly inclined.

In the present invention, unless otherwise clearly specified and limited, the first feature above or below the second feature may include that the first and second features are in direct contact, and may also include that the first and second features are not in direct contact but is through additional feature contacts between them. Moreover, the first feature on, above and above the second feature includes the first feature directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. The first feature being below, below and below the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

There is no repeated description in these two paragraphs. The above paragraph is aimed at the discussion of the description of the implementation in this specification, and the following paragraph is at the description of the drawings corresponding to the implementation of this specification. That is, neither the specific implementation manner of the present invention nor the drawings in the description shall be regarded as an absolute limitation.

Claims (10)

1. A kind of 1. moving-magnetic linear vibration motor, it is characterised in that including：Upper spider, lower bearing bracket, located at the upper spider with External stator fixture between frame, it is fixed on the external stator group on the external stator fixture, in the external stator group Inner stator in chamber, and the mover between the external stator group and inner stator；Wherein

   The external stator group includes the two sets of external stators axially rearranged；The external stator includes external stator core and is embedded in Winding in the coil groove of the external stator core；

   The external stator core, inner stator and mover are coaxially disposed；And

   The external stator core is assembled by the small stator core of some circumferentially array arrangements；The small stator core is spiral shell Rotating c-type structure, the both ends of the small stator core of the spiral c-type are parallel and the certain distance that mutually staggers, and to form The end face at the both ends of the counterpart of the small stator core of two sets of external stators is coplanar.
2. 2. moving-magnetic linear vibration motor according to claim 1, it is characterised in that the small stator core is by upper stator Dock to form spiral c-type structure with lower stator, the spiral c-type structure has inlays coil groove therein suitable for winding；

   The upper stator and lower stator respectively include a base portion and the alar part being connected with the base portion；

   The fitting of the base portion of the base portion of the upper stator and lower stator connects；And

   The alar part of the alar part of the upper stator and lower stator respectively constitutes the both ends of the small stator core of the spiral c-type.
3. 3. moving-magnetic linear vibration motor according to claim 2, it is characterised in that form the spiral shell of two sets of external stators The hand of spiral of the rotating small stator core of c-type is identical, and the winding in the coil groove of the spiral small stator core of c-type around To opposite；And

   Winding in the coil groove of the small stator core of spiral c-type of two sets of external stators is serial or parallel connection.
4. 4. moving-magnetic linear vibration motor according to claim 2, it is characterised in that form the spiral shell of two sets of external stators The hand of spiral of the rotating small stator core of c-type on the contrary, and winding in the coil groove of the small stator core of the spiral c-type around To identical；And

   Winding in the coil groove of the small stator core of spiral c-type of two sets of external stators is serial or parallel connection.
5. 5. the moving-magnetic linear vibration motor according to any one of Claims 1 to 4, it is characterised in that the winding is cake Formula winding.
6. 6. moving-magnetic linear vibration motor according to claim 1, it is characterised in that the mover comprises at least permanent-magnetic clamp And for installing the permanent magnetism body support frame of the permanent-magnetic clamp；

   The permanent magnetism body support frame is and same with the external stator core and inner stator between the external stator core and inner stator Axle is set；

   The permanent-magnetic clamp is made up of the magnetic shoe splicing of multi-disc tile；The magnetic shoe radially magnetizes, and per adjacent two panels The magnetizing direction of the magnetic shoe is opposite；And

   Magnetic shoe number is identical with the number of magnet poles of external stator core, and position is alignd one by one.
7. 7. moving-magnetic linear vibration motor according to claim 1, it is characterised in that the inner stator uses consistency of thickness Stator punching along motor axial direction arrangement closed assembly form.
8. 8. a kind of linear compressor, it is characterised in that including the moving-magnetic linear vibration as described in any one of claim 1~7 Motor, the gas compression mechanism being installed in the middle part of the moving-magnetic linear vibration motor, and it is installed on the moving-magnetic linear The resonant springs component of vibration motor bottom；Wherein

   The moving-magnetic linear vibration motor includes upper spider, lower bearing bracket, outer fixed between the upper spider and lower bearing bracket Sub- fixture, the external stator group on the external stator fixture, the inner stator in the external stator group inner chamber are fixed on, with And the mover between the external stator group and inner stator；And

   The gas compression mechanism connection is assemblied on the upper spider, and the gas compression mechanism and the external stator core It is coaxially disposed with inner stator；

   The resonant springs component connection is assemblied on the lower bearing bracket.
9. 9. linear compressor according to claim 8, it is characterised in that the gas compression mechanism includes and the upper machine Cylinder that frame is fixedly connected, the piston in the cylinder, and for closing the end cap of the cylinder upper end；Wherein

   Valve group is equipped with the cylinder, the valve group includes intake valve and air bleeding valve；

   The piston upper end outer ring is provided with some piston ring grooves, and piston ring is provided with the piston ring groove；Described in each two A plurality of ring packing teeth is equipped between piston ring groove.
10. 10. linear compressor according to claim 8, it is characterised in that the resonant springs component is by several resonance Spring forms；

    The mover of the resonant springs component and the moving-magnetic linear vibration motor is connected and fixed, and by resonant springs component and moves Son one resonator system of composition, i.e.,

    When the electromagnetic excitation frequency of moving-magnetic linear vibration motor is consistent with the intrinsic frequency of resonator system, less electromagnetism Excitation can excite subsystem to enter the larger harmonic moving of line amplitude.