CN218644422U - Linear compressor and linear Stirling refrigerator - Google Patents

Abstract

The utility model discloses a linear compressor and linear stirling refrigerator, this linear compressor include cylinder block, stator module and active cell subassembly, and the cylinder block includes the base and sets up the cylinder on the base, and stator module includes stator frame, stator coil, outer soft magnetism, and active cell subassembly includes compression piston and magnet steel skeleton, the one end of stator frame and the terminal surface fixed connection of base, the other end and the compressor end cover fixed connection of stator frame, and stator coil, outer soft magnetism are all fixed on stator frame's outer wall, and the cylinder is located stator frame, interior soft magnetism cover is established on the cylinder, is fixed with the permanent magnet on the interior soft magnetism, and during the cylinder was inserted to the head end of compression piston, with cylinder sliding fit, the tail end of compression piston passed through magnet steel skeleton and interior soft magnetism fixed connection. The utility model discloses reduced linear compressor radial dimension, the structure is compacter, and the permanent magnet assembly is more firm, has reduced the permanent magnet risk of droing, has improved linear compressor motor efficiency.

Description

Linear compressor and linear Stirling refrigerator

Technical Field

The utility model belongs to the technical field of linear stirling refrigerator, concretely relates to linear compressor and linear stirling refrigerator.

Background

The linear Stirling refrigerator is widely applied to civil and military assembly of thermal infrared imagers, infrared night vision, missile guidance and the like, and the linear compressor is used as a core component of the linear Stirling refrigerator and works more reliably corresponding to the linear Stirling refrigerator.

In the existing Stirling refrigerator, a motor starting structure of a linear compressor is generally divided into a stator structure and a rotor structure, external soft magnets and coils in a stator are fixed on a stator framework, and the stator framework is welded on a base; the permanent magnet in the rotor structure is fixed on the magnetic steel framework, and the magnetic steel framework is fixed with the compression piston, so that the electromagnetic force of the permanent magnet in the axial direction can drive the piston to reciprocate.

The active cell permanent magnet is directly fixed on the magnetic steel framework through the viscose in the existing linear Stirling refrigerator compressor, no matter the permanent magnet is of an external magnetic steel structure or an internal magnetic steel structure, the permanent magnet has a falling risk, an air gap exists between the permanent magnet and internal soft magnet, the internal soft magnet flux gathering effect is reduced, and the motor efficiency of the linear compressor cannot be effectively improved.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's defect, provide a linear compressor and linear stirling refrigerator, reduce linear compressor radial dimension, the structure is compacter, and the permanent magnet assembly is more firm, has reduced the permanent magnet risk of droing, has improved linear compressor motor efficiency.

The technical scheme of the utility model is realized like this: the utility model discloses a linear compressor, including cylinder block, compression piston, permanent magnet, interior soft magnetic, the cylinder block includes the base and sets up the cylinder on the base, interior soft magnetic sleeve establishes on the cylinder, including the permanent magnet is fixed on soft magnetic, the compression piston is located the cylinder, with cylinder sliding fit, the tail end of compression piston passes through magnet steel skeleton and interior soft magnetic fixed connection.

Further, the compression piston is connected with the stator framework through a plate spring.

Furthermore, the compression piston is provided with a cavity, a counterweight body is fixed in the cavity of the compression piston, extends out of the tail end of the compression piston and is connected with the stator framework through a plate spring.

Furthermore, a gap is formed between the inner soft magnet and the outer wall of the air cylinder, and gaps are formed between the inner soft magnet, the permanent magnet and the inner wall of the stator framework.

Furthermore, the outer wall of the stator framework of the linear compressor is provided with fins extending along the radial direction, and the outer soft magnet and/or the stator coil are fixedly connected with the stator framework through the fins.

Further, interior soft-magnetic is cylindric structure, the outer wall of interior soft-magnetic is equipped with the storage tank that is used for installing the permanent magnet, the permanent magnet is fixed in the storage tank of interior soft-magnetic outer wall, makes the cell wall parcel permanent magnet of storage tank on the interior soft-magnetic.

Further, the permanent magnet is fixed on the internal soft magnet by means of gluing.

Further, the base and the cylinder are integrally formed to form a cylinder seat.

When the stator assembly and the rotor assembly are provided with one group, the stator assembly and the rotor assembly are positioned on one side of the cylinder seat to form a single-side linear compressor, and the cylinder is arranged on only one side of the cylinder seat;

when the stator assembly and the rotor assembly are provided with two groups, the two groups of stator assemblies and the rotor assembly are respectively positioned at two sides of the cylinder seat and are symmetrically arranged to form an opposed linear compressor, and cylinders are respectively arranged at two sides of the cylinder seat.

Furthermore, a protection cylinder is sleeved outside the stator framework, the stator coil and the external soft magnet are located in the protection cylinder, one end of the protection cylinder is fixedly connected with the air cylinder, and the other end of the protection cylinder is fixedly connected with the compressor end cover.

The utility model also discloses a linear stirling refrigerator has adopted as above linear compressor.

The utility model discloses following beneficial effect has at least: the utility model discloses in soft-magnetic including wrapping up the active cell permanent magnet, carry out welded fastening with interior soft-magnetic and magnet steel skeleton again, this structure can effectually reduce linear compressor's radial dimension, make the structure compacter, simultaneously, after interior soft-magnetic parcel lived the permanent magnet, not only make fixed more firm on soft-magnetic including the permanent magnet, reduced the risk of droing, but also eliminated the magnetic flux air gap between interior soft-magnetic and the permanent magnet, the magnetic flux gathering effect of soft-magnetic in the messenger is better, linear compressor motor efficiency has been improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a linear compressor according to an embodiment of the present invention.

In the drawing, 1 is a counterweight, 2 is a plate spring, 3 is a compressor end cover, 4 is a screw, 5 is a stator framework, 6 is a magnetic steel framework, 7 is internal soft magnetism, 8 is a permanent magnet, 9 is a stator coil, 10 is external soft magnetism, 11 is a cylinder seat, 111 is a base, 112 is a cylinder, 12 is a compression piston, and 13 is a protection cylinder.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the present invention.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; in the description of the present invention, "a plurality" or "a plurality" means two or more unless otherwise specified.

Example one

Referring to fig. 1, the embodiment of the utility model provides a linear compressor, including cylinder block 11, stator module and active cell subassembly, cylinder block 11 includes base 111 and sets up cylinder 112 on base 111, base 111 is equipped with compression chamber and airflow channel, airflow channel one end and compression chamber intercommunication, and the airflow channel other end runs through the base lateral wall, with cylinder 112's inner chamber and base 111's compression chamber intercommunication, stator module includes stator frame 5, stator coil 9, outer soft magnetism 10, active cell subassembly includes compression piston 12 and magnet steel skeleton 6, the one end of stator frame 5 and the terminal surface fixed connection of base 111, the other end and the compressor end cover 3 fixed connection of stator frame 5 form inside airtight cavity between stator frame 5, cylinder block 11, compressor end cover 3, and the inside airtight cavity is filled with the refrigeration working medium, stator coil 9, outer soft magnetism 10 are all fixed on stator frame 5's outer wall, cylinder 112 is located stator frame 5, and interior 7 covers is established on cylinder 112, be fixed with permanent magnet 8 on interior 7, the compression piston 12's insert in the cylinder 112, with cylinder 112 with the cylinder 112 tail end clearance fit's end magnet steel 7.

The end faces of the compressor end cover 3 and the stator framework 5 are fixed together through welding. The inner soft magnet 7 is welded and fixed with the magnetic steel framework 6, and the magnetic steel framework 6 is welded and fixed with the compression piston 12.

Further, the compression piston 12 is provided with a cavity, and a counterweight 1 is fixed in the cavity of the compression piston 12.

Further, the compression piston 12 is connected to the stator frame 5 via a leaf spring 2. The plate spring 2 is sleeved on the compression piston 12 and connected with the compression piston 12, the outer ring of the plate spring 2 is provided with a fixing hole, and the outer ring of the plate spring 2 is fixedly connected with the stator framework 5 through a screw 4. Of course, the present invention is not limited to the above embodiment, and when the weight body 1 is fixed in the cavity of the compression piston 12, the following embodiments may be adopted: the cavity extends along the axial direction of the compression piston 12, penetrates through the tail end of the piston sleeve but does not penetrate through the head end of the piston sleeve, and the balance weight body 1 in the cavity of the compression piston 12 extends outwards and is connected with the stator framework 5 through the plate spring 2.

Further, be equipped with the installation journal stirrup that is used for fixed plate spring 2 on the inner wall of stator skeleton 5, be equipped with the screw hole on the installation journal stirrup.

Further, a gap is formed between the inner soft magnet 7 and the outer wall of the cylinder 112, gaps are formed between the inner soft magnet 7, the permanent magnet 8 and the inner wall of the stator framework 5, the permanent magnet 8 corresponds to the stator coil 9, and the stator coil 9 is wrapped in the outer soft magnet 10.

Further, the stator frame 5 is a stepped cylindrical structure, the stator coil 9 is fixed around a first shaft section of the stator frame 5, and the outer diameter of the first shaft section of the stator frame 5 is smaller than the outer diameters of a second shaft section and a third shaft section which are respectively located at two ends of the stator frame.

Furthermore, the outer wall of the stator framework of the linear compressor is provided with fins extending along the radial direction, and the external soft magnet and/or the stator coil are fixedly connected with the stator framework through the fins.

Further, the outer wall of the stator frame 5 is provided with fins extending in the radial direction at two ends of the stator coil 9, and the two ends of the stator coil 9 are fixedly connected with the fins at the two ends, for example, fixed by adhesive bonding. The fins of the stator framework 5 are wrapped in the outer soft magnets 10, and the outer soft magnets 10 are fixedly connected with the fins of the stator framework 5, for example, the fins are fixed through adhesive bonding.

Further, the outer diameter of the second shaft section of the stator frame 5 is equal to the outer diameter of the compressor end cover 3, and the outer diameter of the third shaft section of the stator frame 5 is smaller than the outer diameter of the compressor end cover 3. The stator framework 5 is positioned with the spigot of the base 111 and fixedly connected with the spigot of the base. The outer wall of the finned ring stator framework 5 is arranged.

Further, interior soft-magnetic 7 is cylindric structure, the outer wall of interior soft-magnetic 7 is equipped with the storage tank that is used for installing permanent magnet 8, permanent magnet 8 is fixed in the storage tank of interior soft-magnetic 7 outer wall, makes the cell wall parcel permanent magnet 8 of storage tank on interior soft-magnetic 7.

Further, the permanent magnet 8 is fixed to the inner soft magnet 7 by means of gluing.

Further, the base 111 is integrally formed with the cylinder 112 to constitute the cylinder block 11.

Further, a protection cylinder 13 is sleeved outside the stator framework 5, the stator coil 9 and the external soft magnet 10 are located in the protection cylinder 13, one end of the protection cylinder 13 is fixedly connected with the air cylinder 112, and the other end of the protection cylinder 13 is fixedly connected with the compressor end cover 3.

Further, the stator assembly and the rotor assembly have one group or two groups, when the stator assembly and the rotor assembly have one group, the stator assembly and the rotor assembly are positioned on one side of the cylinder base 11 to form a single-side linear compressor, and the cylinder 112 is arranged on only one side of the cylinder base 11;

when the stator assembly and the rotor assembly have two sets, the two sets of stator assembly and the rotor assembly are respectively located at two sides of the cylinder block 11 and are symmetrically arranged to form an opposed linear compressor, and the cylinders 112 are respectively arranged at two sides of the cylinder block 11.

This embodiment is an opposed linear compressor. The compression piston 12 is placed in the 11 hole formation clearance seals of cylinder block, and the unilateral clearance of compression piston 12 and cylinder block 11 is no longer than 10um, and the reciprocating motion of compression piston 12 in cylinder block 11 and compressed gas form periodic pressure wave. The permanent magnet 8 can be installed in the inner soft magnet 7 in a self-locking mode through viscose or a structure, the two sides of the inner soft magnet 7 are wrapped with the edge to wrap the permanent magnet 8, the permanent magnet 8 can be firmly installed, air gaps between the inner soft magnet 7 and the permanent magnet 8 can be eliminated, and the motor efficiency is improved. The inner soft magnet 7 is fixedly welded with one side of the magnetic steel framework 6, the other side of the magnetic steel framework 6 is welded with the compression piston 12, meanwhile, the counterweight body 1 is also fixed with the compression piston 12, and the end part of the counterweight body 1 is fixed with the plate spring 2. The leaf spring 2 is fixed to the cylinder block 11 by means of screws 4. The stator coil 9 is fixed on the cylinder block 11 through the fins on the cylinder block 11. The outer soft magnet 10 is fixed with fins of the cylinder seat 11 in an adhesive mode, the outer soft magnet 10 is made of low-magnetic-resistance materials, an excitation magnetic field generated after the coil is electrified can be effectively gathered, and the motor efficiency is improved. The compressor end cover 3 is fixed with the end face of the air cylinder seat 11 through welding, an inner closed cavity is formed, the stator coil 9 and the outer soft magnet 10 are isolated outside the cavity, the inner closed cavity is filled with refrigerating working medium gas, and the protection barrel 13 is sleeved on the air cylinder seat 11, the compressor end cover 3 and the outer soft magnet 10 to play roles in beautifying and protecting the appearance.

The linear compressor has the working principle that the permanent magnet 8 can generate periodic electromagnetic force under the alternating excitation magnetic field of the stator coil 9, drives the compression piston 12 to do periodic reciprocating motion in the inner hole of the cylinder seat 11 and compress working medium gas to form periodic pressure waves, and the periodic pressure waves are transmitted to the expansion machine of the linear refrigerator to form a refrigeration effect.

Example two

The embodiment of the utility model provides a linear stirling refrigerator has still been disclosed, the linear compressor as in embodiment one has been adopted.

The utility model discloses a linear compressor adopts interior soft-magnetic 7 direct parcel active cell permanent magnet 8, will interior soft-magnetic 7 again and carry out welded fastening with magnet steel skeleton 6, can effectively eliminate the magnetic flux air gap between interior soft-magnetic 7 and the permanent magnet 8, reduces linear compressor radial dimension, makes linear compressor structure compacter, and the assembly of permanent magnet 8 is more firm, has reduced the risk of droing, improves interior soft-magnetic 7 magnetic flux gathering effect, promotes linear compressor motor efficiency.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A linear compressor, characterized in that: the compression piston is positioned in the cylinder and is in sliding fit with the cylinder, and the tail end of the compression piston is fixedly connected with the inner soft magnet through a magnetic steel framework.

2. The linear compressor as set forth in claim 1, wherein: the compression piston is connected with the stator framework through a plate spring.

3. The linear compressor as set forth in claim 1, wherein: the compression piston is provided with a cavity, a counterweight body is fixed in the cavity of the compression piston, extends out of the tail end of the compression piston and is connected with the stator framework through a plate spring.

4. The linear compressor as set forth in claim 1, wherein: a gap is arranged between the inner soft magnet and the outer wall of the cylinder, and a gap is arranged between the inner soft magnet, the permanent magnet and the inner wall of the stator framework.

5. The linear compressor of claim 1 or 4, wherein: the outer wall of the stator framework of the linear compressor is provided with fins extending along the radial direction, and the outer soft magnet and/or the stator coil are fixedly connected with the stator framework through the fins.

6. The linear compressor as set forth in claim 1, wherein: the interior soft-magnetic is cylindric structure, the outer wall of interior soft-magnetic is equipped with the storage tank that is used for installing the permanent magnet, the permanent magnet is fixed in the storage tank of interior soft-magnetic outer wall, makes the cell wall parcel permanent magnet of storage tank on the interior soft-magnetic.

7. The linear compressor of claim 1 or 6, wherein: the permanent magnet is fixed on the internal soft magnet in an adhesive mode.

8. The linear compressor as set forth in claim 1, wherein: the base and the cylinder are integrally formed to form a cylinder seat.

9. The linear compressor as set forth in claim 1, wherein: the stator assembly and the rotor assembly are provided with one group or two groups, when the stator assembly and the rotor assembly are provided with one group, the stator assembly and the rotor assembly are positioned on one side of the air cylinder seat to form a single-side linear compressor, and the air cylinder is arranged on only one side of the air cylinder seat;

when the stator assembly and the rotor assembly are provided with two groups, the two groups of stator assemblies and the rotor assembly are respectively positioned at two sides of the cylinder seat and are symmetrically arranged to form an opposed linear compressor, and cylinders are respectively arranged at two sides of the cylinder seat.

10. A linear stirling cooler, comprising: a linear compressor as claimed in any one of claims 1 to 9 is used.

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