KR20090041724A - Linear compressor - Google Patents

Abstract

A linear compressor is provided to improve the assemblability and productivity by forming guide holes or grooves on the parts of the movable member and thereby performing alignment easily when assembling the parts. A linear compressor(100) comprises a cylinder(200) serving the space in which refrigerant is compacted, a piston(300) which compresses refrigerant by linearly moving back and forth inside the cylinder, and a supporter(320) which is connected to the rear side of the piston and elastically supported in the axial direction. The piston and the supporter have at least two guide holes which are connected in the axial direction. When assembling the piston and the supporter, a guide pin is inserted into the guide holes in order to align the piston and the supporter.

Description

Linear Compressor {LINEAR COMPRESSOR}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a linear compressor, and more particularly, to a linear compressor capable of improving the assemblability of components constituting a movable member for reciprocating linear motion.

In general, the reciprocating compressor is configured to compress the refrigerant while the piston reciprocates linearly within the cylinder by forming a compression space in which the working gas is absorbed and discharged between the piston and the cylinder.

Recently, the reciprocating compressor includes a component such as a crank shaft in order to convert the rotational force of the drive motor to the reciprocating linear kinetic force of the piston, there is a problem that a large mechanical loss caused by the movement change occurs. Many linear compressors have been developed for this purpose.

Such a linear compressor, in particular, allows the piston to be directly connected to a linear motor in reciprocating linear motion, thereby eliminating mechanical loss due to motion switching, thereby improving compression efficiency, and having a simple structure, and controlling power input to the linear motor. Since the operation can be controlled, the noise is lower than that of other compressors, so it is widely applied to home appliances such as refrigerators used indoors.

1 is a view showing an example of a linear compressor according to the prior art. Conventional linear compressors have a frame (1), a cylinder (2), a piston (3), a suction valve (4), a discharge valve assembly (5), a linear motor (6), and a motor cover (7) inside a shell (not shown). ), The supporter 8, the main body cover 9, the main springs S1 and S2, the muffler assembly 10, and the mass member 20 are installed to be elastically supported.

The cylinder 2 is fitted to the frame 1 so that the discharge valve assembly 5 composed of the discharge valve 5a, the discharge cap 5b, and the discharge valve spring 5c blocks one end of the cylinder 2. On the other hand, the piston 3 is inserted inside the cylinder 2, and a thin suction valve 4 is installed to open and close the suction port 3a of the piston 2.

The linear motor 6 is installed so that the permanent magnet 6c can reciprocally linearly move while maintaining a gap between the inner stator 6a and the outer stator 6b, and the permanent magnet 6c is connected by the connecting member 6d. It is installed to be connected to the piston (3), and operates the piston (3) while the permanent magnet (6c) reciprocating linear movement by mutual electromagnetic force between the inner stator (6a), the outer stator (6b) and the permanent magnet (6c) .

The motor cover 7 supports the outer stator 6b in the axial direction to fix the outer stator 6b and is bolted to the frame 1, and the body cover 9 is coupled to the motor cover 7. A supporter 8 connected to the other end of the piston 3 is installed between the motor cover 7 and the main body cover 9 so as to be elastically supported in the axial direction by the main springs S1 and S2, and sucks the refrigerant. Muffler assembly 10 is also fastened like the supporter (8).

At this time, the main springs (S1, S2) includes four front springs (S1) and four rear springs (S2) in a position that is symmetrical up and down and left and right relative to the supporter (8), the linear motor (6) As it is actuated, the front springs S1 and the rear springs S2 behave in opposite directions while cushioning the piston 3 and the supporter 8. In addition, the refrigerant on the compression space P side acts as a kind of gas spring to cushion the piston 3 and the supporter 8.

Therefore, when the linear motor 6 is operated, the piston 3 and the muffler assembly 10 connected thereto are reciprocated linearly, and the suction valve 4 and the discharge valve assembly are changed as the pressure of the compression space P is varied. The operation of (5) is automatically adjusted, and by this operation, the refrigerant is compressed past the suction pipe on the shell side, the opening of the body cover 9, the muffler assembly 10, and the suction ports 3a of the piston 3. It is sucked into the space P and compressed, and then exits through the discharge cap 5b, the roof pipe and the outlet pipe on the shell side.

2 and 3 is a view showing an example of the assembly structure of the movable member of the linear compressor according to the prior art. One example of the movable member is assembled in the axial direction of the reciprocating linear motion, the piston 3, the connection member 6d with the permanent magnet 6c, the supporter 8, the muffler assembly 10, the mass member 20 It includes. Of course, the flange portion of the piston 3, the connection member (6d), the supporter (8), the muffler assembly 10, the mass member (20) are two bolt holes (3h, 6h) so as to be fastened to the bolt (B) , 8h, 10h, 20h are provided, and the assembling protrusions 3a are formed in the axial direction on the inner diameter of the flange portion of the piston 3 so as to match the assembling positions with each other.

Therefore, the movable member is assembled using the assembling jig (Z), but is seated so that the flange of the piston (3) is caught by the piston seating portion (Z1), and the assembling protrusion (3a) of the piston (3) is a permanent magnet. After the connecting member 3d is seated at the rear of the piston 3 so as to fit into the inner diameter of the connecting member 6d provided with 6c, the assembling protrusion 3a of the piston 3 is connected to the inner diameter of the supporter 8. At the same time, the supporter 8 is seated behind the connecting member 6d so that the supporters 8a and 8b of the supporter 8 are seated on the two supporter mounting protrusions Z2 and Z3. In addition, the muffler assembly 10 is seated behind the supporter 8, and the mass member 20 is seated behind the muffler assembly 10 while a part of the muffler assembly 10 is fitted to the inner diameter of the mass member 20. . Thus, when the fastening positions of the piston 3, the connection member 6d with the permanent magnet 6c, the supporter 8, the muffler assembly 10 and the mass member 20 are aligned, the respective bolt holes ( Bolts B are assembled through 3h, 6h, 8h, 10h and 20h.

However, the linear compressor according to the prior art is difficult to assemble the components of the movable member in the correct position because the parts such as the piston, the supporter, etc. are magnetized by the permanent magnet connected to the connecting member when the movable member is assembled. Forming protrusions can be separately formed on the inner diameter of the flange of the piston, and the connection position can be adjusted by fitting the connecting member and the supporter to the assembly protrusion of the piston.In addition, the fastening position of parts such as muffler assembly and mass member can be adjusted. There is a problem that degrades the assembly because it can not.

In addition, the linear compressor according to the prior art has a problem of increasing the manufacturing cost by increasing the material cost, processing cost, etc., because the assembling protrusion of the piston is made by a process requiring a precise tolerance despite the unnecessary portion other than the assembly.

The present invention has been made to solve the above-mentioned problems of the prior art, an object of the present invention is to provide a linear compressor that can be easily assembled at the correct position all the parts constituting the movable member reciprocating linear motion.

In addition, an object of the present invention is to provide a linear compressor capable of reducing additional materials and processing for the convenience of assembly of the components constituting the reciprocating linear motion movable member.

One embodiment of the present invention for solving the above problems is a cylinder for providing a space in which the refrigerant is compressed; A piston compressing a refrigerant line when the cylinder reciprocates linearly forward and backward within the cylinder; And a supporter fastened to the rear of the piston to be elastically supported in the axial direction, wherein the piston and the supporter are provided with at least two guide holes which communicate with each other so that guide pins can be fitted to match the fastening position during assembly. A linear compressor is provided.

In addition, an inner stator fixed to the outer circumferential surface of the cylinder, an outer stator installed at regular intervals with the inner stator, and a permanent magnet installed to maintain a gap between the inner stator and the outer stator, and the permanent magnet is formed by mutual electromagnetic force. A linear motor reciprocating linearly in the direction; The connection member is fastened between the piston and the supporter, and connects the permanent magnet and the piston. The connection member provides a linear compressor, characterized in that the guide holes are provided at positions corresponding to the guide holes of the piston.

In addition, the mass member is fastened to the rear of the supporter, the mass member for increasing the mass in the reciprocating linear motion in the axial direction; further comprising a mass member is provided with guide holes or guide grooves in a position corresponding to the guide hole of the supporter It provides a linear compressor characterized in that.

In addition, the suction muffler is coupled between the supporter and the mass member, and guides the introduction of the refrigerant to the piston; the suction muffler further includes a linear compressor, characterized in that the guide holes are provided at a position corresponding to the guide hole of the supporter. To provide.

In addition, the supporter is composed of a polygonal center coinciding with the center of the piston, at least two front supports bent in two stages so as to extend rearward and radially from the center, and at least two rear supports extending radially from the center. The guide holes of the supporter provide a linear compressor, characterized in that formed between the center and the rear supports.

On the other hand, another embodiment of the present invention includes a cylinder for providing a space in which the refrigerant is compressed; A piston compressing the refrigerant while reciprocating linearly moving forward and backward inside the cylinder, and having a flange at the rear; A supporter coupled to the flange of the piston and elastically supported in the axial direction; A coupling member coupled between the piston and the supporter and provided with a permanent magnet in the circumferential direction; And a suction muffler having a connection part fastened to the rear of the supporter, and guide the inflow of refrigerant to the piston; and the flange part of the piston, the supporter, the connection member, and the connection part of the suction muffler are guided to match the fastening position during assembly. It provides a linear compressor, characterized in that provided with at least two guide holes in axial communication so that the pin can be fitted.

In addition, the mass member is fastened to the rear of the connection portion of the suction muffler, the mass member for increasing the mass to the member reciprocating linear movement in the axial direction, the mass member is a guide hole or at a position corresponding to the guide hole on the connection side of the suction muffler or Provided is a linear compressor comprising guide grooves.

Since the linear compressor according to the present invention configured as described above is provided with a guide hole or a guide groove in each of components such as a piston constituting a movable member, a connecting member with a permanent magnet, a supporter, a suction muffler and a mass member, respectively, When assembling the guide pins or guide grooves of the parts to be fitted to the guide pin to precisely match the fastening position, there is an advantage that can be assembled by bolt assembly to improve the assembly and mass production.

In addition, the linear compressor according to the present invention forms only a guide hole or a guide groove in each of components such as a piston, a connection member with a permanent magnet, a supporter, a suction muffler, and a mass member for ease of assembly of the components constituting the movable member. Because no additional materials and processing is required, there is an advantage to reduce the cost.

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

4 is a diagram illustrating an example of a linear compressor according to the present invention. An example of the linear compressor 100 according to the present invention includes a cylinder 200, a piston 300, an inner stator 420 and an outer stator 440, and a permanent magnet 460 in a shell 110 that is a closed container. Including linear motor 400, mass member 900, if the permanent magnet 460 is linearly reciprocated by the mutual electromagnetic force between the inner stator 420 and the outer stator 440, connected to the permanent magnet 460 The piston 300 is linear reciprocating motion with the permanent magnet 460.

The inner stator 420 is fixed to the outer circumference of the cylinder 200, the outer stator 440 is fixed by the frame 520 and the motor cover 540 in the axial direction, the frame 520 and the motor cover 540 Is coupled to each other by a fastening member such as a bolt, and the outer stator 440 is fixed between the frame 520 and the motor cover 540. The frame 520 may be integrally formed with the cylinder 200 or may be manufactured separately from the cylinder 200 and combined with the cylinder 200. 4 shows an example in which the frame 520 and the cylinder 200 are integrally formed.

The supporter 320 is connected to the rear of the piston 300. Four front main springs 820 are supported at both ends by the supporter 320 and the motor cover 540. In addition, the four rear main springs 840 are supported at both ends by the supporter 320 and the back cover 560, and the back cover 560 is coupled to the rear of the motor cover 540. A suction muffler 700 is also provided at the rear of the piston 300, and refrigerant flows into the piston 300 through the suction muffler 700, thereby reducing noise during refrigerant suction.

The inside of the piston 300 is hollow to allow the refrigerant introduced through the suction muffler 700 to enter and compress the compression space P formed between the cylinder 200 and the piston 300. A suction valve 610 is installed at the front end of the piston 300, and the suction valve 610 is opened so that the refrigerant flows into the compression space P from the piston 300, and again the piston () in the compression space P. The tip of the piston 300 is closed so as not to flow into the 300.

When the refrigerant is compressed to a predetermined pressure or more by the piston 300 in the compression space P, the discharge valve 620 located at the tip of the cylinder 200 is opened. The discharge valve 620 is installed to be elastically supported by the spiral discharge valve spring 630 inside the support cap 640 fixed to one end of the cylinder 200. The compressed high-pressure refrigerant is discharged into the discharge cap 660 through a hole formed in the support cap 640, and then discharged to the outside of the linear compressor 100 through the loop pipe L to circulate a refrigeration cycle.

Each of the components of the linear compressor 100 described above is supported by the front support spring 120 and the rear support spring 140 in an assembled state, and is spaced apart from the bottom of the shell 110. Since it is not in direct contact with the bottom of the shell 110, the vibration generated in the components of the compressor 100 while compressing the refrigerant is not transmitted directly to the shell (110). Therefore, the noise generated by the vibration transmitted to the outside of the shell 100 and the vibration of the shell 110 can be reduced.

5 to 7 is a view showing an example of the assembly structure of the movable member of the linear compressor according to the present invention. An example of the movable member is a component such as a piston 300, a connection member 480 having a permanent magnet 460, supporter 320, suction muffler 700, mass member 900 is assembled in the axial direction, A pair of guide pins (A) provided in the assembling jig (Z) is inserted into the guide holes (300h, 480h, 322h, 700h) and the guide groove (900h) provided in the components constituting the movable member for precise fastening After the position is adjusted, the bolt B is tightened in the axial direction. Of course, the movable member is integrally reciprocated linearly in the axial direction by the driving force generated by the linear motor 400 (shown in FIG. 4).

The piston 300 is provided with a refrigerant inlet 301 at one end of the block, and a flange portion 302 extending radially at the open end. The flange portion 302 of the piston 300 is provided with four bolt holes (not shown) around it, as well as two guide holes 300h between the bolt holes.

The connecting member 480 has a cylindrical shape, and the permanent magnet 460 is seated at a predetermined interval in the circumferential direction on the outer circumferential surface thereof, and a closed end of the connecting member 480 is a flange portion of the piston 300 at the rear of the piston 320. 302 is assembled to cover. A closed end of the connection member 480 is provided with a hole (not shown) so that the suction muffler 700 penetrates in the center, and four bolt holes (not shown) are also provided around the hole, and between the bolt holes. Two guide holes 480h are provided.

The supporter 320 is located in a rearward and radial direction from two opposite ends of the central portion, based on a rectangular central portion (not shown) that abuts the flanged portion 302 of the piston 300 and the closed end of the connecting member 480. A pair of anterior supports 321a, 321b extending to be bent in two stages to elastically support the anterior main springs 820 (shown in FIG. 4), and radially extended from the two opposite ends of the central portion to the rear main springs ( 840: a pair of rear support parts 322a and 322b for elastically supporting the one shown in FIG. 4, so that the center of the supporter 320 is seated on the closed end of the connection member 380 behind the connection member 480. Is installed. The center of the supporter 320 is provided with a hole (not shown) so that the suction muffler 700 penetrates in the center, and four bolt holes (not shown) are also provided around the hole, that is, the inner side of the corner, and the rear support part is provided. Two guide holes 322h are provided inside the fields 322a and 322b. Of course, the bolt holes and the guide holes 300h and 480h of the piston 300 and the connecting member 480 are provided at the same position based on the positions of the bolt holes and the guide holes 322h of the supporter 320, respectively. .

The suction muffler 700 has a portion of the tip portion of the piston 300 passing through the flange portion 302, the connection member 480, and the center of the supporter 320, and the connection portion 701 extending radially in the middle portion thereof is supported by the supporter. The rear of the 320 is installed to be seated in the center of the supporter 320. The connection part 701 of the suction muffler 700 is also provided with four bolt holes (not shown) and two guide holes 700h to correspond to the supporter 320.

Mass member 900 is added to increase the total mass of the movable member, it is preferably formed in a rectangular shape, such as the center of the supporter 320 to have the maximum mass in a limited installation space, the mass member 900 Is installed to be seated on the connection portion 701 of the suction muffler 700 in the rear of the suction muffler 700. The mass member 900 has a hole (not shown) through which the suction muffler 700 penetrates at the center, and four bolt holes (not shown) and two guide grooves 900h around the hole to correspond to the supporter 320. ) Is provided. The guide grooves 900h of the mass member 900 are formed in an arc shape at both ends of the mass member 900 so that only the opposing portions of the guide pins A may be seated.

The piston 300, the connection member 480 is provided with a permanent magnet 460, the supporter 320, the suction muffler 700, the mass member 900 is assembled in the assembly jig (Z), for assembly The jig (Z) is provided with a cylindrical piston seat (Z1) that can be caught in the flange portion 302 of the piston 300 in the state that the piston 300 is fitted, the upper end of the piston seat (Z1) A pair of guide pins (A) for adjusting the fastening position is provided.

Therefore, the process of assembling the movable member in the assembling jig (Z) will be described. In the state where the guide holes (300h) of the piston (300) are fitted to the guide pins (A), the piston (300) of the assembling jig (Z) is assembled. After seating on the piston seating portion Z1, the piston 300 is connected to the connecting member 480 with the guide holes 480h of the connecting member 480 provided with the permanent magnet 460 fitted to the guide pins A. It is seated on the flange portion 302 of the. In addition, the center of the supporter 320 is seated on the connecting member 480 so that the guide holes 320h of the supporter 320 are fitted to the guide pins A, and then the guide holes 700h of the suction muffler 700 are formed. The connection part 701 of the suction muffler 700 is seated on the center of the supporter 320 so as to be fitted to the guide pins A. Finally, the guide grooves 900h of the mass member 900 are fitted to the guide pins A. The mass member 900 is seated on the connection portion 701 of the suction muffler 700. Of course, the piston 300, the supporter 320, the suction muffler 700, the mass member 900 may be magnetized by the permanent magnet 460 installed on the connection member 480, but the guide pins (A) By the fastening position of the parts is fixed. As such, when the fastening positions of components such as the piston 300, the connection member 480, the supporter 320, the suction muffler 700, and the mass member 900 are aligned, the bolts B are connected to the bolt holes of the components. Can be easily assembled at the correct position to improve the assemblability, and further increase the material cost and processing cost as the guide holes (300h, 480h, 320h, 700h) and the guide groove (900h) are generated during sheet metal or injection molding of parts. It does not occur, thus reducing the cost.

In the above, the present invention has been described in detail by way of examples based on the embodiments of the present invention and the accompanying drawings. However, the scope of the present invention is not limited by the above embodiments and drawings, and the scope of the present invention will be limited only by the contents described in the claims below.

1 is a view showing an example of a linear compressor according to the prior art.

2 and 3 is a view showing an example of the assembly structure of the movable member of the linear compressor according to the prior art.

4 shows an example of a linear compressor according to the invention.

5 to 7 is a view showing an example of the assembly structure of the movable member of the linear compressor according to the present invention.

<Explanation of symbols on main parts of the drawings>

100: linear compressor 200: cylinder

300: piston 320: supporter

400: linear motor 420: inner stator

440: outer stator 460: permanent magnet

480: connection member 700: suction muffler

Claims (7)

A cylinder providing a space in which the refrigerant is compressed; A piston compressing the refrigerant while reciprocating linearly moving forward and backward inside the cylinder; And, And a supporter fastened to the rear of the piston and elastically supported in the axial direction. The piston and the supporter is a linear compressor, characterized in that provided with at least two guide holes in the axial communication so that the guide pin can be fitted to fit the tightening position during assembly. The method of claim 1, Inner stator fixed to the outer circumferential surface of the cylinder, outer stator radially spaced from the inner stator, and permanent magnets installed to maintain a gap between the inner and outer stator, and the permanent magnet in the axial direction by mutual electromagnetic force Linear motor reciprocating linear motion; It is connected between the piston and the supporter, further comprising a connection member for connecting the permanent magnet and the piston; The connecting member is a linear compressor, characterized in that the guide holes are provided in a position corresponding to the guide hole of the piston. The method of claim 1, And a mass member fastened to the rear of the supporter and configured to increase mass to the member reciprocating linearly in the axial direction. The mass member is a linear compressor, characterized in that the guide holes or guide grooves are provided in a position corresponding to the guide hole of the supporter. The method of claim 3, And a suction muffler fastened between the supporter and the mass member to guide the inflow of the refrigerant to the piston. The suction muffler is a linear compressor, characterized in that the guide holes are provided in a position corresponding to the guide hole of the supporter. The method according to any one of claims 1 to 4, The supporter consists of a polygonal center coinciding with the center of the piston, at least two front supports bent in two steps to extend rearward and radially from the center, and at least two rear supports extending radially from the center, The guide hole of the supporter is a linear compressor, characterized in that formed between the center and the rear support. A cylinder providing a space in which the refrigerant is compressed; A piston compressing the refrigerant while reciprocating linearly moving forward and backward inside the cylinder, and having a flange at the rear; A supporter coupled to the flange of the piston and elastically supported in the axial direction; A coupling member coupled between the piston and the supporter and provided with a permanent magnet in the circumferential direction; And a suction muffler having a connection part fastened to the rear of the supporter and guiding the inflow of the refrigerant to the piston. The piston, the supporter, the connecting member, the connecting portion of the suction muffler, the linear compressor, characterized in that provided with at least two guide holes communicated in the axial direction so that the guide pin can be fitted to fit the tightening position during assembly. The method of claim 6, And a mass member fastened to the rear of the connection portion of the suction muffler and configured to increase the mass to the member reciprocating linearly in the axial direction. The mass member is a linear compressor, characterized in that the guide holes or guide grooves are provided at a position corresponding to the guide hole on the connection side of the suction muffler.

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