KR20090095113A - Oil-valve assembly for linear compressor - Google Patents

Abstract

An oil-valve assembly for a linear compressor is provided to prevent magnetic oil valve from being adhered to the pheripheral components even if magnetism is formed in neighboring. An oil-valve assembly for a linear compressor comprises a frame(520), oil valve(1202), oil cover(1204), and oil sheet(1203). The frame comprises an inhalation storage hole(522a) and a discharging storage hole(522b). The inhalation storage hole and discharging storage hole are connected with flow paths in which the oil flows in and out. The oil valve comprises an inhalation valve(1202a) and a discharging valve(1202b) which control the oil. The oil valve is formed with the magnetic material. The oil cover comprises an inhalation storage cap(1204a) and a discharging storage cap(1204b) which provisionally store the oil.

Description

OIL-VALVE ASSEMBLY FOR LINEAR COMPRESSOR}

The present invention relates to an oil valve assembly of a linear compressor that regulates an oil supply, and more particularly, to an oil valve assembly of a linear compressor that can improve oil supply performance by securing operating reliability of an oil valve even when magnetic is formed around the oil compressor.

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 back cover 9, the main springs S1 and S2, the muffler assembly 10, and the oil supply device 20 are installed to be elastically supported.

The cylinder 2 is fitted to the frame 1, and the discharge valve assembly 5 composed of the discharge valve 5a, the support cap 5b, the discharge valve spring 5c, and the discharge cover 5d is provided with the cylinder 2 The piston 3 is inserted inside the cylinder 2, while the thin suction valve 4 is installed to open and close the outlet 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 back cover 9 is coupled to the motor cover 7. The supporter 8 connected to the other end of the piston 3 is installed between the motor cover 7 and the back 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 together with 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.

The oil supply device 20 includes an oil supply pipe 21, an oil pumping unit 22, and an oil valve assembly 23, and is installed to communicate with an oil circulation path (not shown) formed in the frame 1. At this time, the oil supply pipe 21 is one end is contained in the oil of the bottom surface of the shell, the oil pumping unit 22 is an oil piston (not shown) elastic support in the oil cylinder (not shown) connected to the oil supply pipe 21 In this state, the oil is pumped while reciprocating linearly, and the oil valve assembly 23 regulates the supply of oil by the pressure difference in the partitioned space.

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 intake pipe on the shell side, the opening of the back cover 9, the muffler assembly 10, and the inlets 3a of the piston 3. It is sucked into the space P and compressed, and then exits through the discharge cover 5d, the roof pipe and the outlet pipe on the shell side.

In addition, when the oil pumping part 22 pumps oil by vibration generated by the reciprocating linear motion of the piston, the oil is sucked through the oil supply pipe 21 and the oil pumping part 22, and then the oil is oil valve assembly. (23) While being flowed by the pressure difference inside, it is supplied to the oil circulating flow path on the side of the frame (1), while passing between the cylinder (2) and the piston (3) cools the parts and reduces friction.

In Korean Patent Application No. 2006-0004658, the oil valve assembly is composed only of a thin oil valve provided with a suction valve and a discharge valve, and an oil cover provided with overlapping oil valves and having predetermined grooves through which oil flows in and out. do. In addition, in Korea Patent Application No. 2007-, the oil valve assembly is configured in the same manner as in Korea Patent Application No. 2006-0004659, the oil cover is composed of a non-magnetic material. Therefore, even if the magnetic portion is formed around the conventional oil valve assembly, it is possible to prevent the magnetic valve of the magnetic material from being attached to the non-magnetic oil cover, and as a result, it is possible to improve the assembly performance and oil supply performance of the parts.

However, while the oil valve assembly of the linear compressor according to the prior art is made of a relatively thin oil valve of the magnetic material, the oil cover of the non-magnetic material is made relatively thick to form a groove of a predetermined size therein. There is a problem in that injection molding is required rather than manufacturing a press, thereby increasing the manufacturing cost.

The present invention has been made to solve the above problems of the prior art, and even if the magnetic is formed around the oil valve assembly of the magnetic material as well as preventing the oil valve of the magnetic material is attached to the peripheral parts, easy to manufacture The purpose is to provide.

The oil valve assembly of the linear compressor according to the present invention for solving the above problems is a frame provided with a suction storage groove and a discharge storage groove communicating with the flow paths oil flows in / out; A magnetic oil valve installed on one surface of the frame and having a suction valve and a discharge valve configured to control oil flowing into and out of the storage grooves; An oil cover installed to overlap the oil valve and having an intake storage cap and a discharge storage cap for temporarily storing oil; And, it is installed between the oil valve and the oil cover, the oil sheet of non-magnetic material to communicate so that the oil is discharged through the suction storage groove and the suction storage cap to the discharge storage cap and the discharge storage groove; characterized in that it comprises a.

In the present invention, the oil sheet is characterized in that the stainless steel.

In addition, in the present invention, the oil sheet is characterized in that made of aluminum material.

The oil valve assembly of the linear compressor according to the present invention configured as described above is installed so that the oil valve of the magnetic material, the non-magnetic oil seat provided with holes, the oil cover provided with the grooves overlap, the magnetic is formed around Even though the oil valve can be prevented from adhering to the oil seat, it not only improves the operation reliability of the oil valve but also improves the lubrication performance, and the space where the oil flows in the state where the oil sheet and the oil cover which are made relatively thin are overlapped. Since it is formed in the oil sheet and the oil cover can be manufactured by press, there is an advantage that can be easily manufactured to reduce the production cost.

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

2 is a view showing 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, oil supply assembly 1000, 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 linearly reciprocated together with the permanent magnet 460, and the oil stored in the bottom surface of the shell 110 is pumped / supplied by the vibration of the piston 300 to supply the cylinder 200. ) And the piston 300 is lubricated.

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. 2 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 800 are supported at both ends by the supporter 320 and the motor cover 540. In addition, the four rear main springs 800 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 cover 660 through the 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 the refrigeration cycle.

The oil supply assembly 1000 is installed to communicate with an oil circulation passage (not shown) provided in the frame 520 to supply oil between the cylinder 200 and the piston 300, and an oil pumping part for pumping oil. 1100 and an oil valve assembly 1200 for regulating the supply of oil. At this time, the oil pumping unit 1100 is formed with the oil supply pipe 1001 in which one end is contained in the oil on the bottom surface of the shell 110, the oil cylinder (901) is formed integrally with the oil supply pipe 901 ( 1002, an oil piston 1003 reciprocating linearly in the oil cylinder 1002, a pair of oil springs 1004 elastically supporting the oil piston 1003 in an axial direction, and an oil cylinder 1002. A cap 1005 that prevents the open end and abuts the motor cover 540. Therefore, when vibration is generated while the piston 300 reciprocates linearly, the oil piston 1003 reciprocates linearly by vibrating to vary the pressure inside the oil cylinder 1002 by vibrating, and the pressure change inside the oil cylinder 1002. As the oil is pumped in accordance with the operation of the oil valve assembly 1200 is operated to regulate the supply of oil to supply / circulate between the cylinder 200 and the piston 300 through the oil circulation passage.

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 there is no direct contact with the bottom of the shell 110, the vibration generated in the respective components of the compressor 100 while compressing the refrigerant is not directly transmitted 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.

3 is a view showing an example of the oil valve assembly of the linear compressor according to the present invention.

An example of the oil valve assembly 1200 according to the present invention includes a sealing member 1201 sequentially mounted on one surface of the frame 520, an oil valve 1202 of magnetic material, an oil seat 1203 of nonmagnetic material, and magnetic It is made of an oil cover 1204 of the material, the bolt is fastened in a state in which the components are stacked on one surface of the frame (520). Of course, the frame 520 has a cylinder 200 integrally formed at the center thereof, and has a discharge valve mounting part 521 on which a discharge valve assembly can be mounted, and an oil valve assembly 1200 at a lower portion thereof. An oil valve mounting part 522 that can be mounted is provided. In addition, the frame 520 has a pair of flow reducing holes 524 formed at both sides of the wire outlet 523 and the discharge valve mounting part 521 on which one side of the wire is drawn from the linear motor 400 (shown in FIG. 2). In addition, a pair of support protrusions 525 to which the front support spring 120 (shown in FIG. 2) is supported on both sides of the oil valve mounting portion 522 is further provided.

More specifically, the oil valve mounting portion 522 of the frame 520 is provided with a suction port 522in communicating with an oil supply pipe 1001 (shown in FIG. 2) at a lower side thereof, and a suction storage groove for temporarily storing oil ( 522a and the discharge storage groove 522b are formed so as to be partitioned from each other at the lower and upper portions of the center side, and the suction storage groove 522a is provided with a communication port 522h communicating with the oil cylinder 1002 (shown in FIG. 4). At the same time, the discharge storage groove 522b is provided with a discharge port 522out communicating with the oil circulation passage. Of course, there is also provided a bolt hole (not shown) to which the bolt can be fastened.

The sealing member 1201 is made of a thin elastic member, but is installed to prevent oil from leaking between the oil valve mounting portion 522 and the oil valve 1202 of the frame 520. Of course, the sealing member 1201 may include various holes at positions corresponding to the suction storage groove 522a and the discharge storage groove 522b of the oil valve mounting part 522 and the bolt hole.

The oil valve 1202 is formed in a thin shape of a magnetic material, and is formed to partially cut the oil suction valve 1202a and the oil discharge valve 1202b to the front and rear directions, respectively, at the center lower and upper sides thereof, and oil at one lower side of the oil valve 1202a. An inlet port 1202in is formed in communication with the inlet port 522in of the valve mounting portion 522.

The oil sheet 1203 is formed in a plate shape of a nonmagnetic material, and for example, may be made of stainless steel and aluminum. Specifically, the oil seat 1203 has a circular suction storage hole 1203a formed in contact with the lower end of the oil suction valve 1202a at the lower side, while a portion cut around the upper portion of the oil suction valve 1202a at the upper side. And a '저장' -shaped discharge storage hole 1203b which is in contact with the oil discharge valve 1202b, and a suction port 1203in communicating with the suction port 1202in of the oil valve 1202 is formed at one lower side thereof. At this time, the suction storage hole (1203a) is opened and closed by the lower end of the oil suction valve (1202a), the discharge storage hole (1203b) is opened and closed by the oil discharge valve (1202b) at the top and the bottom of the oil valve (1202) Oil communicates with the oil cover 1204.

The oil cover 1204 is stacked on the oil sheet 1203, and a suction storage cap 1204a is formed at a portion where the suction storage hole 1203a and the suction port 1203in of the oil sheet 1203 are positioned, and the discharge storage is performed. The discharge storage cap 1204b is formed to be partitioned from the suction storage cap 1204a at a portion where the hole 1203b is positioned. The suction storage cap 1204a and the discharge storage cap 1204b are in contact with the oil sheet 1203. It is formed to protrude in the opposite direction to the surface. At this time, since the oil cover 1204 forms a space in which the oil flows in the state overlapped with the oil sheet 1203, the suction storage cap 1204a and the discharge storage cap 1204b of the oil cover 1204 are relatively spaced. This may not be formed deep, the oil cover 1204 is produced by pressing a metal plate easily and inexpensively.

The oil supply valve assembly 1200 configured as described above has the sealing member 1201, the oil valve 1202, the oil seat 1203, and the oil cover 1204 sequentially stacked, and then the oil valve mounting portion of the frame 520. 522 is assembled to be fixed by bolts.

Accordingly, vibration is generated while the piston 300 (shown in FIG. 2) reciprocates linearly inside the cylinder 200 according to the operation of the linear motor 400 (shown in FIG. 2), and the oil pumping unit 1100 is caused by the vibration. A pressure difference is generated by this, and oil is supplied through the oil supply pipe 1101 (shown in FIG. 2). At this time, the oil supplied through the oil supply pipe 1101 (shown in FIG. 2) is the inlet port 522in of the oil valve mounting part 522, the inlet port 1202in of the oil valve 1202, and the inlet port 1203in of the oil seat 1203. Is stored in the suction storage cap 1204a of the oil cover 1204, and when the oil suction valve 1202a opens the suction storage hole 1203a of the oil seat 1203 due to the pressure difference, the oil cover 1204 is opened. Oil stored in the suction storage cap (1204a) of the oil suction hole (1203a) of the oil seat (1203), the cut portion around the oil suction valve (1202a) and the discharge storage hole (1203b) of the oil seat (1203) in contact with it It is stored in the discharge storage cap 1204b of the oil cover 1204 through the bottom. Thereafter, when the oil discharge valve 1202b opens the upper portion of the discharge storage hole 1203b of the oil seat 1203 due to the pressure difference, the oil stored in the discharge storage cap 1204b of the oil cover 1204 is stored in the oil sheet 1203. The process of supplying the oil circulation passage through the upper portion of the discharge storage hole 1203b, the discharge storage groove 522b of the oil valve mounting portion 522, and the discharge port 522out is repeated.

Recently, in order to effectively cope with various loads, the current input to the linear motor 400 (shown in FIG. 2) is controlled to vary. When excessive current is input to the linear motor 400 (shown in FIG. 2), the mutual electromagnetic force As a result, the intensity of the flux generated around the linear motor 400 (see FIG. 2) is also increased, and the magnetism is increased. Such magnetism affects the operation of peripheral components including the oil valve assembly 1200. do. In particular, the strong magnetic force generates an attraction force to the oil valve 1202, which is a magnetic material, but the oil is installed so that the sealing member 1201, which is an elastic material, and the oil seat 1203, which is a nonmagnetic material, are overlapped with the oil valve 1202. Since the oil suction valve 1202a and the oil discharge valve 1202b are prevented from being attached to the oil seat by blocking the attraction of the valve 1202, the operation reliability of the oil valve 1202 can be improved to improve the oil supply performance. Furthermore, the operational reliability of the linear compressor can be improved.

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

3 is a view showing an example of the oil valve assembly of the linear compressor according to the present invention.

Claims (3)

A frame having a suction storage groove and a discharge storage groove communicating with flow paths through which oil flows in and out; A magnetic oil valve installed on one surface of the frame and having a suction valve and a discharge valve configured to control oil flowing into and out of the storage grooves; An oil cover installed to overlap the oil valve and having an intake storage cap and a discharge storage cap for temporarily storing oil; And, And a non-magnetic oil sheet installed between the oil valve and the oil cover to communicate the oil to be discharged through the suction storage groove and the suction storage cap to the discharge storage cap and the discharge storage groove. Oil valve assembly. The method of claim 1, The oil valve assembly of a linear compressor, wherein the oil seat is stainless steel. The method of claim 1, The oil seat is an oil valve assembly of a linear compressor, wherein the oil seat is made of aluminum.

Images