KR100543327B1 - Linear compressor - Google Patents

Abstract

The present invention relates to a linear compressor that is easy to manufacture the inner stator.

The linear compressor according to the present invention includes a cylinder block provided with a cylinder forming a compression chamber, a mover for operating a piston by having a magnet for generating a magnetic field outside the cylinder, and an inner stator disposed between the magnet and the cylinder. In one embodiment, a plurality of steel sheets stacked in a circumferential direction and disposed in a cylindrical shape are disposed between the first fixing member and the second fixing member which are press-fitted to each other and disposed in a cylindrical shape by the first fixing member and the second fixing member. By fixing and supporting both ends and inner ends of the steel sheets, there is an effect that the inner stator is simply manufactured.

Description

Linear Compressor {LINEAR COMPRESSOR}

1 is a cross-sectional view showing a linear compressor according to the present invention.

2 is a cross-sectional view showing the assembly process of the inner stator of the linear compressor according to the present invention.

Explanation of symbols on the main parts of the drawings

10: airtight container 20: linear motor

21: magnet 22: outer stator

23: inner stator 231: steel sheet

231a: first locking groove 231b: second locking groove

232: first fixing member 232a: first locking portion

233: second fixing member 233a: press-in hole

233b: second locking portion 233c: fastening groove

234: fastening member 30: compression device

31: cylinder block 32: cylinder

33: cylinder head 34: piston

The present invention relates to a linear compressor, and more particularly to a linear compressor in which the production of the inner stator is easy.

In general, the linear compressor is used as a component of a refrigerating cycle included in a refrigerator and the like to suck and compress a refrigerant and discharge the refrigerant.

Conventional linear compressor includes a linear motor for generating power in a sealed container forming the appearance, and a compression device for suction compression of the fluid by receiving the power of the linear motor.

The compression device includes a cylinder block provided with a cylinder in an axial direction therein, a cylinder head coupled to a lower portion of the cylinder block and having a suction valve and a discharge valve to guide the intake and discharge of fluid, and a linear motor driven inside the cylinder block. And a piston that linearly reciprocates.

The linear motor includes a cylindrical inner stator that is fitted to the outer side of the cylinder, a cylindrical outer stator that is disposed to surround the inner stator, and a vertical motion is installed between the outer stator and the inner stator. It consists of a mover with a magnet that interacts with the stator.

By the way, in the conventional linear compressor, the inner stator is formed by arranging a plurality of steel sheets formed in a thin plate in a circumferential direction to form a cylindrical shape. Thus, a plurality of steel sheets may be fixed to maintain a cylindrical shape. After inserting one end of the steel sheet in the holder provided on the outside of the cylinder, the other end is fixed to each other by welding to maintain the cylindrical shape, there is a problem that the manufacturing of the inner stator is difficult.

The present invention is to solve this problem, it is an object of the present invention to provide a linear compressor that can easily manufacture the inner stator.

The linear compressor according to the present invention for achieving the above object is provided with a cylinder block provided with a cylinder forming a compression chamber, and a magnet for generating a magnetic field on the outer periphery of the cylinder to move the piston and the magnet; And an inner stator disposed between the cylinders, wherein the inner stator includes a plurality of steel sheets stacked in a circumferential direction to form a cylindrical shape, and a first fixing member press-fixed to each other to fix the steel sheets therebetween. And a second fixing member.

In addition, both ends of the steel plate is provided with a first locking groove and a second locking groove to be concave so that the steel plate can be fixed between the first fixing member and the second fixing member, respectively, the first member A first catching portion is formed to catch the first catching groove, and the second catching portion catching the second catching groove is formed in the second member.

In addition, the first member is formed in a cylindrical shape so that the steel plates are arranged in a cylindrical shape on the outer circumferential surface, the second member is characterized in that the indentation hole is fixed to the other end of the first member is press-fitted.

In addition, the second member is characterized in that the fastening groove is concave provided so that the second member is fixed to the cylinder block through the fastening member.

Hereinafter, one preferred embodiment of the present invention will be described in detail with reference to the drawings.

The linear compressor according to the present invention, as shown in Figure 1, a compression device 30 for sucking and compressing and discharging the refrigerant, and a linear motor for generating power by receiving power from the outside to drive the compression device (30) 20 and a sealed container 10 in which the linear motor 20 and the compression device 30 are incorporated.

The compression device 30 is disposed in the lower space of the sealed container 10, the cylinder block 31 having the cylinder 32 in the longitudinal direction at the center portion and the cylinder block 31 is mounted on the lower portion of the refrigerant suction And a cylinder head 33 for guiding discharge. The cylinder 31 is provided with a piston 34 that linearly reciprocates by the linear motor 20.

The cylinder head 33 is formed with a suction chamber 33a for guiding the refrigerant to be sucked into the cylinder 32 and a discharge chamber 33b for discharging the refrigerant compressed in the cylinder 32. ) Between the cylinder block 31 and the valve plate 35 in which the suction hole 35a and the discharge hole 35b are drilled, and the suction hole 35a and the discharge hole 35b according to the reciprocating motion of the piston 34. A suction valve 36 and a discharge valve 37 for opening and closing the valve are provided. Therefore, when the piston 34 retracts from the cylinder 32, the suction valve 36 is opened so that the refrigerant in the suction chamber 33a is sucked into the cylinder 32 through the suction hole 35a, while the piston 34 When the cylinder 32 is advanced to the inside, the discharge valve 37 is opened, and the refrigerant in the cylinder 32 is compressed and discharged to the discharge chamber 33b through the discharge hole 35b.

The linear motor 20 is disposed outside the cylinder 32 and includes a magnet 21 for moving the piston 34 forward and backward, an outer stator 22 installed to cover the outside of the magnet 21, and an outer stator. The inner stator 23 is disposed on the outer circumference of the cylinder 32 so as to maintain a predetermined distance from the 22.

The magnet 21 is installed to enable the up and down reciprocating movement between the outer stator 22 and the inner stator 23, the upper end is connected to the piston 34 through the normal mover 21a, so that the piston 34 Will be activated. At this time, the upper side of the piston 34 is provided with a leaf spring type resonance spring 24 that resonates in the vertical direction, thereby doubling the reciprocating force of the piston 34.

In addition, the outer stator 22 is disposed to form a predetermined gap with the inner stator 23 to surround the outer periphery of the magnet 21, which is a plurality of steel sheets 221 and the steel sheet 221 stacked in the radial direction. It includes a coil 222 wound circumferentially in the field to form a magnetic field at the time of power supply. In order to fix the outer stator 22, the fixing frame 31b is fastened to the frame portion 31a extending outward from the lower portion of the cylinder block 31 through bolts. That is, when the outer stator 22 is disposed between the frame part 31a and the fixed frame 31b, and the bolt is fastened, the outer stator 22 is firmly fixed to the upper portion of the cylinder block 31.

In addition, the inner stator 23 is disposed on the outer side of the cylinder 32 to allow the magnetic field formed in the outer stator 22 and the magnet 21 to interact, and the detailed structure of the inner stator 23 is as follows. .

The inner stator 23 is formed in a cylindrical shape, as shown in FIG. A plurality of steel sheets 231 arranged in a cylindrical shape are provided with a first fixing member 232 and a second fixing member 233 to maintain the cylindrical shape.

The first fixing member 232 and the second fixing member 233 are press-fitted to each other to be fixed in a state where a plurality of steel sheets 231 are disposed in a cylindrical shape, and the first fixing member 232 is a cylinder. The first fixing member 232 is press-fitted to the second fixing member 233 so as to be disposed on the outside thereof so as to support the inner ends of the plurality of steel sheets 231 arranged in the cylindrical shape. A circular indentation hole 233a having an indentation tolerance with an outer circumferential surface of the first fixing member 232 is provided to be fixed.

In addition, the second fixing member 233 is provided with a concave fastening groove 233c so that the inner stator 23 may be fixed to the cylinder block 31 through a fastening member 234 such as a screw.

In addition, the first locking member 232 and the second locking member 233 are extended to the first locking portion 232a and the second locking portion 233b to be fixed to both ends of the steel sheets 231. The first locking grooves 231a and the second locking grooves 231b to which the first locking portions 232a and the second locking portions 233b are engaged are provided at both ends of the steel sheets 231, respectively.

Therefore, when the first fixing member 232 and the second fixing member 233 are press-fitted to each other, the first locking portion 232a formed on the first fixing member 232 is provided at one end of the steel sheets 231. Steel plate laminated in the circumferential direction is caught by the first locking groove 231a and the second locking portion 233b formed in the second fixing member 233 is caught in the second locking groove 231b provided at the other end of the steel sheets 231 ( The inner and both ends of the 231 are fixed and supported by the first fixing member 232 and the second fixing member 233 to be fixed in a cylindrical shape.

Next, the manufacturing process and the effect of the inner stator of the linear compressor according to the present invention configured as described above will be described.

In the manufacture of the inner stator 23 of the linear compressor according to the present invention, first, the plurality of steel sheets 231 are arranged in a circumferential direction to form a cylindrical shape, and then inside the plurality of steel sheets 231 arranged in the cylindrical shape. One end of the first fixing member 232 penetrates and then press-fixes to the press-in hole 233a provided in the second fixing member 233.

At this time, in the process in which the first fixing member 232 is press-fitted into the press-in hole 233a of the second fixing member 233, the first locking portion 232a of the first fixing member 232 is formed of a steel sheet ( The steel sheets 231 are inserted into the first locking grooves 231a of the 231 and the second locking portions 233b of the second fixing member 233 are caught by the second locking grooves 231b of the steel sheets 231. The first fixing member 232 and the second fixing member 233 are maintained in a cylindrical shape, and the manufacture of the inner stator 23 is completed.

In addition, the inner stator 23 manufactured as described above is fastened to the cylinder block 31 by fastening a fastening member 234 such as a screw to the fastening groove 233c provided in the second fastening member 233.

As described in detail above, in the linear compressor according to the present invention, after arranging the steel sheets in a cylindrical shape, both ends and the inner ends of the steel sheets are supported and fixed to the first fixing member and the second fixing member which are press-fitted together. There is an effect of the stator being simply produced.

In addition, there is an effect that the fastening member is fastened to the fastening groove provided in the second fixing member so that the inner stator is simply fixed to the cylinder block.

Claims (4)

A cylinder block provided with a cylinder forming a compression chamber, and a magnet for generating a magnetic field on the outside of the cylinder to move the piston and the inner stator disposed between the magnet and the cylinder, The inner stator includes a plurality of steel sheets stacked in a circumferential direction to form a cylindrical shape, and a first compressor and a second fixing member fixed to each other so that the steel sheets are fixedly installed therebetween. . The method of claim 1, At both ends of the steel plate, a first locking groove and a second locking groove are respectively provided to be concave so that the steel plate may be fixed between the first fixing member and the second fixing member. The first fixing member is formed with a first locking portion that is caught in the first locking groove and the second fixing member is a linear compressor, characterized in that the second locking portion is formed in the second locking groove. The method of claim 1, The first fixing member is formed in a cylindrical shape so that the steel plates are arranged in a cylindrical shape on the outer circumferential surface, the second fixing member is a linear compressor, characterized in that the pressing hole for pressing-fixing the first fixing member is provided. The method of claim 1, And the fastening groove is concave in the second fixing member such that the second fixing member is fixed to the cylinder block through the fastening member.

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