KR100529899B1 - Linear compressor - Google Patents

Abstract

The present invention relates to a linear compressor in which a defective rate and cost can be reduced, and a manufacturing process can be simplified. A suction connection pipe connected to the sealed container so that refrigerant is sucked into the sealed container; A cylinder block installed in the sealed container and provided with a cylinder; A piston disposed to linearly move into the cylinder and having a refrigerant passage through which the refrigerant passes; A suction valve for opening and closing the refrigerant passage; A discharge valve installed to open and close the inside of the cylinder by the refrigerant pressure inside the cylinder; A magnet installed to linearly move the piston; An outer core installed at the cylinder block; An inner core installed to have a predetermined gap with the outer core; A bobbin formed on the outer core and having a hollow inner circumferential portion and both side portions projecting radially outwardly from both ends of the inner circumferential portion; A coil wound on the outside of the inner circumference to be disposed between both sides of the bobbin; And an insulated wire wound a plurality of times to surround the outermost end of the coil wound on the bobbin.

Description

Linear compressor {Linear compressor}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a linear compressor for compressing a gas refrigerant, and more particularly, to a linear compressor that wraps the outer end of a coil wound on a bobbin with an insulated wire.

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.

Conventional linear compressors include a compression unit (4) composed of a piston (1) and a cylinder (2) for compressing a gas refrigerant, and a drive unit composed of a stator (5) and a mover (6) for linearly reciprocating the piston (1). Divided into (8).

The stator 5 includes an outer core 12 formed of a cylindrical laminate, an inner core 14 of a cylindrical laminate inserted to have a predetermined gap with the outer core 12, and the outer core 12. The coil assembly 20 is mounted, and the mover 6 includes a magnet 42 between the inner core 12 and the outer core 14 and a linear movement of the magnet 42 to the piston ( It is composed of a magnet frame 44 to which the magnet 42 and the piston 1 is fixed to be transmitted to 1).

2 is an enlarged cross-sectional view illustrating a coil assembly of a linear compressor according to the prior art.

The coil assembly 20 includes a bobbin 24, a coil 26 wound on the bobbin 24, and a cover 30 covering an outermost end of the coil 26 wound on the bobbin 24. .

The coil assembly 20 forms the bobbin 24 using a mold and then winds the coil 26 on the bobbin 24, and finally, to insulate the coil 26 wound on the bobbin 24. The outer peripheral side of the bobbin 24 is covered with a plastic resin cover 30 using an over mold mold.

However, the linear compressor according to the prior art increases the defect rate due to the over-molding process of the cover 30 during the manufacture of the coil assembly 20, and the mold production and the change due to the change of properties according to the injection time and temperature of the plastic resin Dimensional management is difficult, and there is a problem that the time and cost required for the manufacture of the coil assembly 20 is expensive.

The present invention has been made to solve the above problems of the prior art, to provide a linear compressor that compresses the refrigerant, prevents the refrigerant from penetrating into the coil, reduces the defect rate and cost, and can simplify the manufacturing process. The purpose is.

Linear compressor according to the present invention for solving the above problems is a sealed container; A suction connection pipe connected to the sealed container so that refrigerant is sucked into the sealed container; A cylinder block installed in the sealed container and provided with a cylinder; A piston disposed to linearly move into the cylinder and having a refrigerant passage through which the refrigerant passes; A suction valve for opening and closing the refrigerant passage; A discharge valve installed to open and close the inside of the cylinder by the refrigerant pressure inside the cylinder; A magnet installed to linearly move the piston; An outer core installed at the cylinder block; An inner core installed to have a predetermined gap with the outer core; A bobbin formed on the outer core and having a hollow inner circumferential portion and both side portions projecting radially outwardly from both ends of the inner circumferential portion; A coil wound on an outer side of the inner circumferential portion so as to be disposed between both side portions of the bobbin; And an insulated wire wound a plurality of times to surround the outermost end of the coil wound on the bobbin.

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

3 is a cross-sectional view showing an embodiment of a linear compressor according to the present invention.

As shown in FIG. 3, the linear compressor according to the present exemplary embodiment includes a lower container 102 having an upper surface opened 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. A driving motor 130 for generating a driving force for compressing the refrigerant is disposed between the, and the piston for compressing the refrigerant in the cylinder 109 while advancing into the cylinder 109 in the drive motor 130 150 is connected.

The drive motor 130 is composed of a stator and a mover to linearly reciprocate the mover by an electromagnetic force formed in the stator. The stator has an outer core 131 formed of a laminate and a predetermined gap with the outer core 131. An inner core 132 formed of a laminated body disposed therein, and a coil assembly 133 mounted on the outer core 131, wherein the mover is moved forward and backward by an electromagnetic force formed in the coil assembly 133. The magnet 134 positioned between the 131 and the inner core 132 and the magnet 134 and the piston 150 are disposed to be retractable between the outer core 131 and the inner core 132. It is composed of a magnet frame 136 is fixed.

The outer core 131 is disposed between the opposite surface 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, The inner core 132 is fixedly coupled to the cylinder block 110 by a fastening means such as a fastening member.

Figure 4 is an enlarged cross-sectional view showing a coil assembly of one embodiment of a linear compressor according to the present invention.

As shown in FIG. 4, the coil assembly 133 includes a hollow cylindrical inner circumference 141 and bobbins 142 and 143 protruding radially outward from both ends of the inner circumference 141. 144, a coil 146 wound on the outer side of the inner circumferential portion 141 to be disposed between both side portions of the bobbin 144, and an insulation line surrounding the outermost end of the coil wound on the bobbin 144 ( 148).

Here, the insulation line 148 is preferably used, such as a thread, and must be tightly wound tightly between the two side portions 142 and 143, and is wound in a cylindrical shape surrounding the outermost end of the coil 146 as a whole.

In addition, the insulation wire 148 is preferably thicker than the thickness of the coil 146 so that the winding operation can be performed quickly and simply, it is preferable that a plurality of windings in consideration of reliability.

Meanwhile, as shown in FIG. 3, the magnet frame 136 is formed in a cylindrical shape surrounding a part of the outside of the piston 150 and may be fixed to the piston 150 by a fastening means such as a fastening member. The piston fixing portion 136a is provided to be bent radially inward.

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 therethrough, and the piston fixing portion of the magnet frame 136 ( The frame fixing part 152 protrudes in the circumferential direction at one end thereof so that the 136a can 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 current is applied to the coil 146, a magnetic field is formed around the coil assembly 133, the magnet 134 is linearly reciprocated by the interaction with the magnetic field, the magnet frame 136 Is linearly reciprocated with the magnet 134 to linearly reciprocate the piston 150 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 as a shield, 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, some of the gas refrigerant during the opening and closing of the suction valve 160 and the discharge valve 170 and the compression of the gas refrigerant is a gap between the cylinder block 110 and the outer core 131, Although the gap between the back cover 120 and the outer core 131 or the gap between the outer core 131 is introduced into the periphery of the coil assembly 133, the coil 146 is the bobbin ( Since it is sealed by the inner circumferential portion 141 and both side portions 142 and 143 of the 144 and the insulating line 148, the gas refrigerant is not affected.

Hereinafter, the manufacturing process of the coil assembly configured as described above is as follows.

First, after forming the bobbin 144 using a mold, the coil 146 is wound around the inner circumferential portion 141 of the bobbin 144.

Then, when the insulation wire 148 is wound around the outermost end of the coil 146 to insulate the coil 146 wound on the bobbin 144, the coil 146 is the bobbin 144 and the insulation wire ( 148).

On the other hand, the process of winding the insulated wire 148 may be a linear movement while rotating the bobbin 144 wound around the coil 146 to automatically wound the insulated wire 148, the bobbin 144 Of course, it is also possible to wind the insulation wire 148 directly to the outermost end of the wound coil 146.

In the linear compressor according to the present invention configured as described above, the coil is wound around the bobbin, and the insulation wire is wound around the outermost end of the coil wound on the bobbin to insulate the coil, thereby preventing the gas refrigerant from penetrating into the coil. Therefore, there is an advantage that the defective rate and cost are reduced, and the manufacturing process is simplified.

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

2 is an enlarged cross-sectional view showing a coil assembly of a linear compressor according to the prior art;

3 is a cross-sectional view showing an embodiment of a linear compressor according to the present invention;

Figure 4 is an enlarged cross-sectional view showing a coil assembly of one embodiment of a linear compressor according to the present invention.

<Explanation of symbols on main parts of the drawings>

100: sealed container 109: cylinder

110: cylinder block 120: back cover

130: drive motor 131: outer core

132: inner core 133: coil assembly

134: magnet 136: magnet frame

144: bobbin 146; coil

148: insulated wire 150: piston

160: suction valve 170: discharge valve

Claims (3)

A sealed container; A suction connection pipe connected to the sealed container so that refrigerant is sucked into the sealed container; A cylinder block installed in the sealed container and provided with a cylinder; A piston disposed to linearly move into the cylinder and having a refrigerant passage through which the refrigerant passes; A suction valve for opening and closing the refrigerant passage; A discharge valve installed to open and close the inside of the cylinder by the refrigerant pressure inside the cylinder; A magnet installed to linearly move the piston; An outer core installed at the cylinder block; An inner core installed to have a predetermined gap with the outer core; A bobbin formed on the outer core and having a hollow inner circumferential portion and both side portions projecting radially outwardly from both ends of the inner circumferential portion; A coil wound on the outside of the inner circumference to be disposed between both sides of the bobbin; And an insulated wire wound a plurality of times so as to surround the outermost end of the coil wound on the bobbin. The method of claim 1, And said insulated wire is a seal. The method according to claim 1 or 2, And said insulation wire is thicker than said coil.