KR20090053131A - Oil valve assembly for linear compressor - Google Patents

Abstract

The present invention includes a frame formed on one surface so that the suction storage groove and the discharge storage groove communicated with a separate flow path is partitioned from each other; A thin oil valve installed on one side of the frame and having an oil suction valve and an oil discharge valve for controlling supply of oil; An oil cover installed to overlap the oil valve, the oil cover configured to partition the suction storage cap and the discharge storage cap in which oil is temporarily stored; And, it is installed between the oil valve and the oil cover, the refrigerant communicates through the suction storage groove and the suction storage cap to be discharged through the discharge storage cap and the discharge storage groove, it is possible to prevent the accumulation of dirt between the oil valve and. It provides an oil valve assembly of the linear compressor, characterized in that it comprises an oil seat having a groove for discharging the dirt, it is possible to further improve the oil supply performance by preventing the flow path is blocked by dirt contained in the oil.

Linear compressor, oil valve assembly, frame, oil valve, oil cover, oil seat, groove for draining dirt

Description

OIL VALVE ASSEMBLY FOR LINEAR COMPRESSOR}

The present invention relates to an oil valve assembly of a linear compressor that regulates oil supplied between a cylinder and a piston, and more particularly, to an oil valve assembly of a linear compressor that can improve oil supply performance by allowing dirt contained in oil to be smoothly discharged. will be.

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.

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.

2 and 3 is a view showing a part of an example of the oil valve assembly of the linear compressor according to the prior art and its operating state, respectively. Referring to FIGS. 1 to 3, the conventional oil supply device 20 includes an oil supply pipe 21, an oil pumping part 22, and an oil valve assembly 23, but an oil circulation path formed in the frame 1. It is installed to communicate with (not shown). 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 includes an oil valve 23a for adjusting the supply of oil and an oil cover (not shown) for forming a space in which the oil is temporarily stored. It is configured to include an oil sheet (23b) is installed to communicate between the 23a and the oil cover. At this time, the oil valve 23a includes an oil suction valve Va for adjusting the oil sucked from the oil cylinder and an oil discharge valve Vb for adjusting the oil discharged through the oil circulation passage, and the oil seat 23b. Is equipped with a circular suction port (Hin) for the oil passing through the oil suction valve (Va) to the oil cover at the same time 'ㅗ' shape that passes through the oil stored in the oil cover to the oil discharge valve (Vb) The communication port Ha is provided.

Therefore, when the pressure in the oil cylinder is changed by the vibration of the oil pumping part 22, the oil is sucked through the oil supply pipe 21 and the oil pumping part 22, and then the oil suction valve Va is caused by the pressure difference. When the inlet opening (Hin) of the oil seat (23b) is opened, the oil is sucked into the oil cover and temporarily stored, and the oil outlet valve (Vb) continuously communicates with the oil seat (23b) by the pressure difference. When Ha) is opened, the oil stored in the oil cover is discharged along the oil circulation passage.

However, the oil supply device of the linear compressor according to the prior art is installed so that the thin oil valve 23a and the oil seat 23b overlap, and the oil discharge valve Va has a relatively narrow and long length of the oil seat 23b. Since the communication port (Ha) is installed to open and close all, since the opening and closing amount of the oil discharge valve (Vb) from the oil seat (23b) is not large, the space between the oil discharge valve (Vb) and the oil seat (23b) is limited, Therefore, the oil containing the dirt is stacked between the oil valve 23a and the oil seat 23b, which not only lowers the oil supply performance but also lowers the operation reliability.

The present invention has been made to solve the above problems of the prior art, to provide a space between the oil valve and the oil seat to provide an oil valve assembly of the linear compressor that can prevent the dirt contained in the oil is laminated. The purpose is.

The present invention for solving the above problems is a frame formed on one surface so that the suction storage groove and the discharge storage groove communicated with a separate flow path is partitioned from each other; A thin oil valve installed on one side of the frame and having an oil suction valve and an oil discharge valve for controlling supply of oil; An oil cover installed to overlap the oil valve, the oil cover configured to partition the suction storage cap and the discharge storage cap in which oil is temporarily stored; And, it is installed between the oil valve and the oil cover, the refrigerant communicates through the suction storage groove and the suction storage cap to be discharged through the discharge storage cap and the discharge storage groove, it is possible to prevent the accumulation of dirt between the oil valve and. It provides an oil valve assembly of the linear compressor comprising a; oil seat having a groove for discharging the dirt.

In addition, in the present invention, the oil sheet is a communication port for forming a flow path is located between the suction storage hole opened and closed by the oil suction valve, the discharge storage hole opened and closed by the oil discharge valve, the suction storage hole and the discharge storage hole. Further, the dirt discharge groove is characterized in that the stepped groove shape extended from the communication port toward the discharge storage hole.

In addition, in the present invention, the oil discharge valve is formed long in the longitudinal direction from the portion corresponding to the waste discharge groove to the portion corresponding to the discharge storage hole, the width of the portion corresponding to the discharge discharge hole corresponding to the discharge storage hole. It is characterized in that it is formed narrower than the width of the portion.

In addition, in the present invention, the oil discharge groove is characterized in that it is positioned so that only a part of the oil discharge valve overlap so that the dirt can be discharged.

The oil valve assembly of the linear compressor according to the present invention configured as described above is provided with a groove for discharging dirt, which is a predetermined space between the oil valve and the oil seat, even if the oil passes between the oil valve and the oil seat. This can be prevented from stacking, thereby improving oil supply performance and increasing operational reliability.

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, oil supply assembly 1000, the permanent magnet 460 and the permanent magnet 460 when the permanent magnet 460 linearly reciprocates by mutual electromagnetic force between the inner stator 420 and the outer stator 440 The connected piston 300 is linear reciprocating motion with the permanent magnet 460, the oil stored in the bottom surface of the shell 110 through the oil supply assembly 1000 by the vibration of the piston 300 is pumped / supplied while 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. 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 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 an oil cylinder 1002 which is integrally formed with the oil supply pipe 1001 in which one end is contained in the oil on the bottom surface of the shell 110 and the frame 520 and is connected to the oil supply pipe 901. ), An oil piston 1003 reciprocating linearly in the oil cylinder 1002, a pair of oil springs 1004 elastically supporting the oil piston 1003 in the axial direction, and opening of the oil cylinder 1002. It is made of a cap (1005) to prevent the one end is in contact with 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.

5 and 6 are views illustrating an example of an oil valve assembly and an operating state of the linear compressor according to the present invention, respectively. An example of the oil valve assembly 1200 according to the present invention includes a sealing member 1201, an oil valve 1202, an oil seat 1203, and an oil cover 1204 that are sequentially mounted on one surface of the frame 520. Bolting is performed while the above 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 out from the linear motor 400 (shown in FIG. 4). In addition, a pair of support protrusions 525 to which the front support spring 120 (shown in FIG. 4) 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 has a suction port 522in communicating with an oil supply pipe 1001 (shown in FIG. 4) at one lower side thereof, and an oil suction storage groove for temporarily storing oil ( 522a and the discharge storage groove 522b are formed so that the lower portion and the upper portion of the center side are partitioned from each other, 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 the shape of a metal plate, 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 the oil valve at one lower side thereof. A suction port 1202 in is formed in communication with the suction port 522 in of the mounting portion 522.

The oil seat 1203 is formed in the shape of a metal plate, and a circular suction storage hole 1203a is opened and closed by an end of the oil suction valve 1202a on the lower side, while the oil discharge valve 1202b is on the upper side. A circular discharge storage hole 1203b, which is opened and closed by the opening, is formed, 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 oil sheet 1203 is provided with a communication port 1203h between the suction storage hole 1203a and the discharge storage hole 1203b, and discharges stepped dirt between the communication port 1203h and the discharge storage hole 1203b. The groove 1203c is provided, and the communication port 1203h and the dirt discharge groove 1203c are installed to overlap a part of the oil suction valve 1202a and a part of the oil discharge valve 1202b.

In particular, the dirt sales groove 1203c of the oil seat 1203 is an oil valve 1202 so that the dirt X contained in the oil may be easily discharged even if the dirt X is stacked between the oil valve 1202 and the oil seat 1203. It is formed wider than the width of the oil discharge valve 1202b, the oil discharge valve 1202b of the oil valve 1202 opens and closes the discharge storage hole 1203b of the oil seat 1203 to increase the amount of opening and closing in the front and rear directions. It is preferable that the width is formed thinner than the portion except the end to be made.

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 hole is formed. The discharge storage cap 1204b is formed to be partitioned from the suction storage cap 1204a at a portion where the portion 1204b 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.

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 as the piston 300 (shown in FIG. 4) reciprocates linearly inside the cylinder 200, and a pressure difference is generated by the oil pumping unit 1100 due to the vibration. The oil is supplied via (shown in 4). At this time, the oil supplied through the oil supply pipe 1101 (shown in FIG. 4) 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 (1) is the suction storage hole (1203a) of the oil seat 1203, the suction storage groove (522a) of the oil valve mounting portion 522, the communication port (1203h) of the oil seat (1203) ) Is stored in the discharge storage cap 1204b of the oil cover 1204 through. Thereafter, when the oil discharge valve 1202b opens 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 seat 1203. The process of supplying the oil circulation path through the discharge storage hole 1203b, the discharge storage groove 522b of the oil valve mounting part 522, and the discharge port 522out is repeated.

Of course, as the oil valve 1202 and the oil seat 1203 are stacked on each other in a plate shape, dirt (X) contained in the oil is easily stacked, but the groove 1320c for the waste discharge of the oil seat 1203 is an oil valve. While maintaining a gap between the 1202 and the oil seat 1203, the oil discharge valve 1202b of the oil valve 1202 is also formed to increase the amount of opening and closing in the front and rear directions so that the dust (X) can be easily discharged even if stacked. It is possible to improve the lubrication performance, and to ensure smooth lubrication between the cylinder 200 and the piston 300 (shown in Figure 4) can also increase the operating reliability.

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 are a view showing a part of an example of the oil valve assembly of the linear compressor according to the prior art and its operating state, respectively.

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

5 and 6 are views each showing an example of the oil valve assembly and the operating state of the linear compressor according to the present invention.

Claims (4)

A frame formed on one surface such that the suction storage groove and the discharge storage groove communicated with separate flow paths are partitioned from each other; A thin oil valve installed on one side of the frame and having an oil suction valve and an oil discharge valve for controlling supply of oil; An oil cover installed to overlap the oil valve, the oil cover configured to partition the suction storage cap and the discharge storage cap in which oil is temporarily stored; And, It is installed between the oil valve and the oil cover, and the refrigerant communicates through the suction storage groove and the suction storage cap to be discharged through the discharge storage cap and the discharge storage groove, and prevents the accumulation of dirt between the oil valve and the Oil valve assembly of a linear compressor comprising a; oil seat having a discharge groove. The method of claim 1, The oil seat further includes a suction storage hole opened and closed by an oil suction valve, a discharge storage hole opened and closed by an oil discharge valve, and a communication hole positioned between the suction storage hole and the discharge storage hole to form a flow path. The dirt discharge groove is an oil valve assembly of a linear compressor, characterized in that the stepped groove shape extending from the communication port toward the discharge storage hole. The method of claim 2, The oil discharge valve is formed to be long in the longitudinal direction from a portion corresponding to the waste discharge groove to a portion corresponding to the discharge storage hole, and the width of the portion corresponding to the discharge discharge hole is larger than the portion corresponding to the discharge storage hole. An oil valve assembly of a linear compressor, characterized in that formed narrowly. The method of claim 1, Oil groove assembly of the linear compressor, characterized in that the oil discharge groove is positioned so that only a part of the oil discharge valve overlaps so that dirt can be discharged.

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