KR100529902B1 - Outer stator mounting structure of linear compressor - Google Patents

Abstract

The present invention relates to an outer stator assembly structure of a linear compressor in which alignment between a plurality of unit core blocks constituting a core block is easy and cost is reduced, and a coil assembly; In a linear compressor including a core block formed with a receiving groove for receiving a portion of the coil assembly, the core block is composed of a plurality of unit core blocks to be divided into a plurality, a plurality of units constituting the core block At least some of the core blocks may be formed with protrusions inserted into grooves formed in neighboring unit core blocks.

Description

Outer stator mounting structure of linear compressor

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a linear compressor, and more particularly, to an outer stator assembly structure of a linear compressor that can easily assemble a coil assembly constituting an outer stator and a plurality of core blocks.

In general, a linear compressor (linear compressor) is a linear driving force of the linear motor is transmitted to the piston and the piston sucks and compresses the refrigerant gas while linearly reciprocating the inside of the cylinder.

1 is a cross-sectional view of a linear compressor according to the prior art.

As shown in FIG. 1, a conventional linear compressor includes a closed container 1, a compression unit 4 composed of a piston 2 and a cylinder 3 for compressing a gas refrigerant, and a straight line between the piston 2. It consists of the linear motor 10 which reciprocates.

The linear motor 10 is composed of a stator and a mover, and the stator includes an outer stator 17 including a coil assembly 11 and a plurality of core blocks 14 disposed radially on the coil assembly 12. And an inner stator 20 having a predetermined gap with the outer stator 18, wherein the mover includes a magnet 22 positioned between the outer stator 18 and the inner stator 20, and the magnet 22. It is configured to include a magnet frame 24 is mounted and the magnet 22 is fixed to the piston (2) so that the linear motion of the) can be transmitted to the piston (2).

The coil assembly 11 includes a bobbin 12 and a coil 13 wound on the bobbin 12.

The core block 14 is composed of first and second unit core blocks 15 and 16 which surround the coil assembly 11 so that a portion of the coil assembly 11 is accommodated.

The first and second core blocks 15 and 16 are formed by stacking a plurality of steel sheets.

On the other hand, the outer stator 18 further includes an insulating member 19 of plastic resin covered by overmolding to surround the outer circumferences of the coil assembly 11 and the core block 14.

Reference numeral 30 denotes a refrigerant passage formed in the piston 2, reference numeral 31 denotes a suction valve operated by a gas refrigerant to open and close the refrigerant passage 30, and reference numeral 32 denotes a gas refrigerant. By the discharge valve for opening and closing the cylinder 3 by the reference numeral 33 is a suction connection pipe connected to the sealed container (1).

In the linear compressor as described above, when a voltage is applied to the coil 13, the linear motor 10 operates to linearly reciprocate the magnet 22, and the linear reciprocating motion of the magnet 22 is performed by the magnet frame. It is transmitted to the piston 2 via 24 so that the piston 2 linearly reciprocates in the cylinder 3.

As the piston 2 linearly reciprocates in the cylinder 3, the discharge valve 32 and the suction valve 31 are opened and closed, and the gas refrigerant is sealed through the suction connecting pipe 33. After being sucked into the inside, the cylinder is sucked into the cylinder 3 through the refrigerant passage 30 of the piston 2.

On the other hand, the gas refrigerant sucked into the cylinder (3) is compressed to a high pressure by the piston (2), the compressed gas refrigerant is discharged to the outside of the sealed container 1 through a discharge tube (not shown).

Figure 2 is a schematic diagram showing the outer stator assembly structure of the linear compressor according to the prior art, Figure 3 is an enlarged perspective view of the main portion showing the assembled state of the outer stator of the linear compressor according to the prior art.

In the assembling of the outer stator 17, the bobbin 12 is formed using a mold, and then the coil 14 is wound around the bobbin 12 to assemble the coil assembly 11.

Then, a plurality of steel sheets are stacked to assemble each of the first and second core blocks 15 and 16.

Then, while the coil assembly 11 is surrounded by the first and second unit core blocks 15 and 16, the coil assembly 11 and the core block 14 are finally overmolded ( Into the outer periphery of the coil assembly 11 and the core block 14 to cover the insulating member 19 of the plastic resin.

However, in the linear compressor according to the prior art, since the first and second unit core blocks 15 and 16 are supported by the insulating member 19 and maintain their shape without a separate fixing structure, the first and second linear compressors are maintained. It is difficult to align the unit core blocks 15 and 16, and the cost increases due to the need for the insulating member 19 and the overmolding process.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems of the prior art, and an object thereof is to provide an outer stator assembly structure of a linear compressor in which alignment between a plurality of unit core blocks constituting a core block is easy and cost is reduced.

The outer stator assembly structure of the linear compressor according to the present invention for solving the above problems is a coil assembly; In a linear compressor including a core block formed with a receiving groove for receiving a portion of the coil assembly, the core block is composed of a plurality of unit core blocks to be divided into a plurality, a plurality of units constituting the core block At least some of the core blocks may be formed with protrusions inserted into grooves formed in neighboring unit core blocks.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

4 is an internal configuration diagram of an embodiment of a linear compressor according to the present invention.

As shown in FIG. 4, the linear compressor according to the present exemplary embodiment includes a lower container 102 in which an airtight container 100 is opened at an upper surface thereof, and an upper cover 104 covering an upper surface of the lower container 102. do.

The cylinder block 110 having the cylinder 109 is mounted on the first damper 106 mounted on one side of the lower container 102 to be buffered and supported by the inside of the hermetic container 100. The back cover 120 having the furnace 120a is mounted on the second damper 108 mounted on the other side of the lower container 102 to be bufferably supported, and the cylinder block 110 and the back cover 120 are supported. The linear motor 130 for generating a driving force for compressing the refrigerant is disposed between the, and the linear motor 130 is a piston for compressing the refrigerant in the cylinder 109 while advancing into the cylinder 109 150 is connected.

The linear motor 130 is composed of a stator and a mover to linearly reciprocate the mover by a magnetic force formed in the stator.

The stator includes an outer stator 140 formed of a core block 135 having a coil assembly 131 and a receiving groove 135a in which a part of the coil assembly 131 is accommodated, and a predetermined gap with the outer stator 140. It consists of an inner stator 142 having a.

The coil assembly 131 is a bobbin to be arranged between the bobbin 132 consisting of a hollow cylindrical inner peripheral portion and both sides protruding radially outward from both ends of the inner peripheral portion, and both sides of the bobbin 132. It comprises a coil 133 wound on the outside of the inner circumferential portion 132 and the insulating member 134 surrounding the outermost end of the coil 133 wound on the bobbin 133.

Here, the insulating member 134 may be made of a cylindrical plastic resin so as to cover the outermost end of the coil 132, and wire members such as threads may be tightly wound in a cylindrical shape. .

The core block 135 is disposed between opposite surfaces of the cylinder block 110 and the back cover 120 is fixedly coupled to the cylinder block 110 and the back cover 120 by a fastening means such as a fastening member, A plurality of the plurality of coil assembly 131 is arranged to be spaced apart in the circumferential direction.

A plurality of core blocks 135 may be provided in one outer stator 140. The plurality of core blocks 135 provided in the one outer stator 140 are radially arranged in the coil assembly 131. The core blocks 135 surround a portion of the coil assembly 131. It is divided into multiple left and right or up and down so that it may be cheap. That is, the core block 135 is composed of a plurality of unit core blocks in which the core block 135 is divided into a plurality of longitudinal directions. Hereinafter, for convenience of description, the core block 135 is limited to a two-divided structure including first and second unit core blocks 136 and 137.

The inner stator 142 is fixedly coupled to the cylinder block 110 by a fastening means such as a fastening member.

On the other hand, the mover is a magnet 146 located between the outer stator 140 and the inner stator 142, and the magnet 146 so that the linear movement of the magnet 146 can be transmitted to the piston 150 ) Is mounted and includes a magnet frame 148 fixed to the piston 150.

The magnet 146 has a cylindrical shape as a whole, and linearly reciprocates in interaction with a magnetic force generated around the coil 133 by a current flowing when a voltage is applied to the coil 133.

The magnet frame 148 is formed in a cylindrical shape surrounding a part of the outside of the piston 150, and the piston fixing portion 148a is radially inward to be fixed to the piston 150 by a fastening means such as a fastening member. It is provided to be bent.

The piston 150 has a refrigerant passage 152a formed to allow the refrigerant sucked through the refrigerant suction passage 120a of the back cover 120 to pass, and the piston fixing part of the magnet frame 148 ( The frame fixing part 152 protrudes in the circumferential direction at one end thereof so that the 148a may be fixed by a fastening means such as a fastening member, and is disposed between one surface of the frame fixing part 152 and the cylinder block 110. The first spring 152b and the second spring 152c disposed between the other surface of the frame fixing part 152 and the back cover 120 can cushion the cylinder block 110 and the back cover 120. Is supported.

On the other hand, the linear compressor is mounted to the piston 150 to open and close the refrigerant passage (152a) and the suction valve 160, and is mounted to the cylinder block 110 to open and close the cylinder 109 It further comprises a discharge valve 170 for forming a compression chamber (C) between the piston 150.

The suction valve 106 has a structure in which one side is fixed to the cylinder 109 and a portion corresponding to the refrigerant through passage 152a of the piston 150 is elastically curved.

The discharge valve 170 is fixed to the cylinder block 110 so as to communicate with the cylinder 109, and an inner discharge cover 172 having a refrigerant discharge hole 171 formed at one side thereof, and an outer side of the inner discharge cover 172. An outer discharge cover 174 disposed spaced apart from each other and connected to a discharge pipe 180 for discharging refrigerant on one side, and a spring 176 supported on the inner discharge cover 172 to open and close the cylinder 109. The valve body 178 is comprised.

In addition, reference numeral 182 is a suction connection pipe connected to the sealed container 100 to suck refrigerant from the outside, and reference numeral 184 is a loop pipe having one end connected to the discharge pipe 180, and reference numeral 186. One end is connected to the roof pipe 184 and is a discharge connection pipe extending through the sealed container 100 to the outside of the sealed container 100.

Looking at the operation of the present invention configured as described above are as follows.

First, when a voltage is applied to the coil 133, a magnetic field is formed around the coil 133, the magnet 146 is linearly reciprocated by the interaction with the magnetic field, the magnet frame 148 While linearly reciprocating with the magnet 146, the piston 150 is linearly reciprocated into the cylinder 109.

At this time, the suction valve 160 and the discharge valve 170 is opened and closed by the flow of the gas refrigerant according to the linear reciprocating motion of the piston 150, the gas refrigerant is introduced into the sealed container 100. After passing through the refrigerant suction passage 120a of the back cover 120 and the through passage 152a of the piston 150, the suction is sucked into the compression chamber C.

The refrigerant sucked into the compression chamber C is compressed by the piston 150 and then passes through the discharge valve 170, the discharge pipe 180, the loop pipe 184, and the discharge connection pipe 186. Sea is discharged to the outside of the sealed container 100.

On the other hand, during the opening and closing of the intake valve 160 and the discharge valve 170 and the compression of the gas refrigerant as described above, some of the gas refrigerant is a gap between the cylinder block 110 and the core block 135, or the bag The coil 120 is introduced into the periphery of the coil assembly 131 through a gap between the cover 120 and the core block 135 or a gap of the core block 135, but the coil 133 is separated from the bobbin 132 and the insulated wire ( 134) so that it is not affected by the gas refrigerant.

Figure 5 is a schematic diagram showing a core block assembly structure of one embodiment of a linear compressor according to the present invention, Figure 6 is an enlarged perspective view of the main portion showing the assembled state of the outer stator of one embodiment of the linear compressor according to the present invention.

As shown in FIGS. 5 and 6, the first and second unit core blocks 136 and 137 may be grooved in the unit core block 137 adjacent to at least one of the two, so that the first and second unit core blocks 136 and 137 may be fitted together. A protrusion 138 inserted into 139 is formed.

The protrusion 138 and the groove 139 are formed to correspond to a portion where the first and second unit core blocks 136 and 137 contact each other.

In addition, the protrusion 138 and the groove 139 preferably have a minute tolerance so as not to be easily removed during insertion thereof, and preferably have a quadrangle for increasing fastening force.

The first and second unit core blocks 136 and 137 provided as described above are formed by stacking a plurality of steel sheets 136 'and 137' in the thickness direction, respectively.

Of course, any one of the protrusion 138 and the groove 139 is formed in each of the steel sheets 136 ′ and 137 ′ forming the first and second unit core blocks 136 and 137.

Hereinafter, the assembly process of the outer stator 140 configured as described above in detail, as follows. After forming the bobbin 132 using a mold, the coil 133 is wound around the bobbin 132, and the coil assembly 131 is assembled by wrapping the outermost end of the coil 133 with the insulating member 134. do.

Then, each of the first and second unit core blocks 136 and 137 is assembled using a method such as welding while stacking each of the plurality of steel sheets 136 'and 137'.

Then, the protrusion 138 is formed in the groove 139 while surrounding the part of the coil assembly 131 by the first and second unit core blocks 136 and 137 so that a part of the coil assembly 131 may be accommodated. To be inserted.

In this case, the first and second unit core blocks 136 and 137 form the core block 135 while being firmly assembled and fixed to each other by assembling the protrusion 138 and the groove 139. 135 is disposed around a portion of the coil assembly 131, the outer stator 140 is completed the assembly work without any additional process.

On the other hand, the present invention is not limited to the above embodiment, even when the core block 135 is divided into three or more, the projections 138 and the grooves 139 are formed in opposing portions of each core block. Of course, it is also possible to fit each core block assembly.

In the outer stator assembly structure of the linear compressor according to the present invention configured as described above, the core block is formed of a plurality of unit core blocks, and a protrusion inserted into a groove formed in the unit core block adjacent to the unit core block is formed. Since the plurality of unit core blocks are assembled to each other, the tightening force between the plurality of unit core blocks constituting the core block is improved, and the alignment thereof is easy, and a separate support structure or support structure for maintaining the shape of the core block is provided. There is an advantage that the molding process is unnecessary.

1 is a cross-sectional view showing a linear compressor according to the prior art,

Figure 2 is a schematic diagram showing the outer stator assembly structure of the linear compressor according to the prior art,

3 is an enlarged perspective view illustrating main parts of an assembled state of an outer stator of a linear compressor according to the related art;

4 is an internal configuration diagram of an embodiment of a linear compressor according to the present invention;

5 is a schematic view showing an outer stator assembly structure of an embodiment of a linear compressor according to the present invention;

6 is an enlarged perspective view illustrating main parts of an assembled state of the outer stator of the linear compressor according to one embodiment of the present invention.

<Explanation of symbols on main parts of the drawings>

100: sealed container 109: cylinder

110: cylinder block 120: back cover

130: linear motor 131: coil assembly

132: bobbin 133: coil

134: insulating member 135: core block

136: first unit core block 136 ': steel sheet

135a: receiving groove 137: second unit core block

137 ': steel plate

138: protrusion 139: groove

142: inner stator 146: magnet

148: magnet frame 160; Suction valve

170: discharge valve

Claims (3)

A coil assembly; In the linear compressor comprising a core block formed with a receiving groove for receiving a portion of the coil assembly, The core block may include a plurality of unit core blocks to be divided into a plurality, and at least some of the plurality of unit core blocks constituting the core block may have protrusions inserted into grooves formed in neighboring unit core blocks. Assembly structure of outer stator of linear compressor. The method of claim 1, The unit core block has a structure in which a plurality of sheets of steel sheets are stacked, and each steel sheet has any one of the protrusions and the grooves, and the outer stator assembly structure of the linear compressor. The method according to claim 1 or 2, The protrusion and the groove is an outer stator assembly structure of the linear compressor, characterized in that formed in the portion where the plurality of unit core blocks constituting the core block contact each other.