KR20190131786A - Compressor having one piece-type valve sheet and stopper sheet - Google Patents

Abstract

The present invention relates to a compressor including a simultaneous fastening structure of a discharge valve, a valve stopper, and a discharge cover. According to the present invention, a scroll compressor comprises: a valve sheet having a plurality of discharge valves; a stopper sheet having a plurality of valve stoppers; and a fixing member fixing the discharge cover arranged on the stopper sheet to one surface of a fixing scroll. Accordingly, the fastening structure of the discharge valve and the discharge cover can be simplified, and a manufacturing process can be reduced. Moreover, manufacturing costs can be cut.

Description

Compressor having one piece-type valve sheet and stopper sheet

The present invention relates to a compressor including a simultaneous fastening structure of the valve seat, the stopper seat and the discharge cover.

In general, a compressor is applied to a vapor compression refrigeration cycle (hereinafter, referred to as a refrigeration cycle) such as a refrigerator or an air conditioner.

The compressor may be classified into a reciprocating type, a rotary type, and a scroll type according to a method of compressing a refrigerant.

Among these, the scroll compressor is a compressor in which a compression chamber is formed between the fixed wrap of the fixed scroll and the swing wrap of the swing scroll by pivoting the swing scroll to a fixed scroll fixed to the inner space of the sealed container.

Scroll compressors have a relatively high compression ratio compared to other types of compressors, and the suction, compression, and discharge strokes of the refrigerant are smoothly used, and thus are widely used for refrigerant compression in an air conditioner.

Such scroll compressors may be classified into upper compression type or lower compression type according to the position of the drive motor and the compression part. The upper compression type is a method in which the compression part is located above the drive motor, and the lower compression type is a method in which the compression part is located below the drive motor.

Here, the compression unit includes a main frame fixed to the inner space of the casing, a fixed scroll coupled to one side of the main frame, and a pivoting scroll which pivots between the main frame and the fixed scroll and forms the fixed scroll and the compression chamber. At this time, the fixed scroll is provided with a plurality of discharge ports through which the refrigerant compressed in the compression chamber is discharged.

The conventional scroll compressor has a structure in which a discharge valve and a valve stopper for limiting the movable range of the discharge valve are individually fastened and assembled for each discharge port. The individual fastening structure of the discharge valve increases the number of manufacturing steps of the scroll compressor and causes the manufacturing cost to rise.

The lower compression scroll compressor also includes a discharge cover that forms a lower discharge chamber for guiding the refrigerant discharged from the discharge port.

In this case, in the conventional scroll compressor, a fastening hole for fastening the discharge cover is formed separately on the fixed scroll, so that a process for fastening the discharge cover has to be further performed.

In other words, the conventional scroll compressor assembles a plurality of discharge valves, valve stoppers, and discharge covers in separate processes, thereby complicating the manufacturing process of the scroll compressor and increasing the manufacturing cost.

On the other hand, when the contact area of the discharge port and the discharge valve is widened, the static friction force (Oil stiction) by the oil is increased. Accordingly, the conventional scroll compressor has a problem that a loss due to overcompression occurs during operation of the scroll compressor when the static frictional force by the oil in the discharge valve increases.

An object of the present invention is to provide a scroll compressor that can simplify the fastening structure and reduce the manufacturing cost by fastening the discharge valve, the valve stopper and the discharge cover at the same time.

In addition, an object of the present invention is to provide a scroll compressor that can flatten one surface of the fixed scroll and integrally fix the valve seat, the stopper seat and the discharge cover on the one surface, thereby preventing leakage of refrigerant and increasing reliability. .

In addition, an object of the present invention is to provide a scroll compressor that can reduce the loss due to overcompression during operation of the compressor by reducing the static frictional force caused by the oil generated between the discharge valve and the discharge port.

The objects of the present invention are not limited to the above-mentioned objects, and other objects and advantages of the present invention, which are not mentioned above, can be understood by the following description, and more clearly by the embodiments of the present invention. Also, it will be readily appreciated that the objects and advantages of the present invention may be realized by the means and combinations thereof indicated in the claims.

The scroll compressor according to the present invention includes a valve seat having a plurality of discharge valves, a stopper seat having a plurality of valve stoppers, and a fixing member for fixing the discharge cover disposed on the stopper seat to one surface of the fixed scroll. . Through this, the present invention can simplify the fastening structure of the discharge valve and the discharge cover, it is possible to reduce the manufacturing process and reduce the manufacturing cost.

In addition, the scroll compressor according to the present invention includes a fixed scroll having one surface processed so as to be disposed on the same plane in contact with one surface of the valve seat, and a valve seat, a stopper seat, and a discharge cover to which a layer layer is coupled on the fixed scroll. Through this, the present invention can reduce the leakage amount of the refrigerant generated between the fixed scroll and the discharge cover, it is possible to improve the reliability of the compressor.

In addition, the scroll compressor according to the present invention includes a stepped groove formed to have a step inwardly in an area overlapping the discharge valve, and a fixed scroll including a rounded portion which contacts one side of the discharge valve and protrudes from the stepped groove. Through this, the present invention can reduce the static frictional force caused by the oil generated between the discharge valve and the discharge port.

In the scroll compressor according to the present invention, the discharge valve, the valve stopper, and the discharge cover may be simultaneously locked, thereby eliminating the step of separately assembling the discharge valve and the valve stopper for each discharge port of the fixed scroll. Further, the present invention can also unify the process for fixing the discharge cover by fixing the discharge valve and the valve stopper together with the discharge cover. That is, according to the present invention, by simultaneously fastening the discharge valve, the valve stopper and the discharge cover, the fastening structure can be simplified to reduce the number of processing steps required for the manufacture of the scroll compressor. This simultaneous fastening structure can reduce the labor required to produce the product, the manufacturing time and cost required to produce the product, thereby improving product competitiveness.

In addition, the scroll compressor according to the present invention can reduce the amount of refrigerant leaked between the fixed scroll and the discharge cover as the coupling structure between the fixed scroll, the valve seat, the stopper seat and the discharge cover is simplified. As the refrigerant leakage decreases, the operation efficiency and operational stability of the scroll compressor may be improved, and the reliability of the product may be improved.

In addition, the scroll compressor according to the present invention can implement accurate operation of the discharge valve by reducing the static frictional force caused by the oil generated between the discharge valve and the discharge port. Accordingly, the present invention can reduce the loss due to overcompression during operation of the compressor to improve the operating efficiency of the compressor. In addition, the present invention can improve the operational stability of the scroll compressor, it is possible to increase the reliability and product recognition and sales volume for the product.

In addition to the effects described above, the specific effects of the present invention will be described together with the following description of specifics for carrying out the invention.

1 is a cross-sectional view showing a scroll compressor according to an embodiment of the present invention.
FIG. 2 is a partial perspective view showing components coupled onto the fixed scroll of FIG. 1.
3 is an exploded perspective view of the components coupled onto the fixed scroll of FIG. 1;
4 is a plan view illustrating the valve seat of FIG. 3.
FIG. 5 is a plan view illustrating the stopper sheet of FIG. 3. FIG.
6 is a perspective view illustrating the discharge cover of FIG. 3.
7 is a cross-sectional view illustrating the structure of the compression unit of FIG. 1.
FIG. 8 is an enlarged partial view of region S of FIG. 7.
9 and 10 are cross-sectional views illustrating a scroll compressor according to another embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to indicate the same or similar components.

Hereinafter, a scroll compressor according to an embodiment of the present invention will be described with reference to FIG. 1.

1 is a cross-sectional view illustrating a scroll compressor according to an embodiment of the present invention.

Referring to FIG. 1, a scroll compressor 1 according to an exemplary embodiment of the present invention is disposed in a casing 210 having an inner space, a drive motor 220 provided at an upper portion of an inner space, and a lower portion of the drive motor 220. Compression unit 200, the rotating shaft 226 for transmitting the driving force of the drive motor 220 to the compression unit 200 may be included.

Here, the inner space of the casing 210 is the first space (V1) of the upper side of the drive motor 220, the second space (V2) between the drive motor 220 and the compression unit 200, the discharge cover ( It may be divided into a third space (V3) partitioned by the 330 and the oil storage space (V4) that is lower than the compression unit 200.

Casing 210 may be, for example, cylindrical in shape, and thus casing 210 may include cylindrical shell 211.

In addition, an upper shell 212 may be installed at an upper portion of the cylindrical shell 211, and a lower shell 214 may be installed at a lower portion of the cylindrical shell 211. The upper and lower shells 212 and 214 may be coupled to the cylindrical shell 211 by welding to form an inner space, for example.

Here, the coolant discharge tube 216 may be installed in the upper shell 212, and the coolant discharge tube 216 is discharged from the compression unit 200 into the second space V2 and the first space V1. It is a passage through which the compressed refrigerant is discharged to the outside.

For reference, an oil separator (not shown) for separating oil mixed in the discharged refrigerant may be connected to the refrigerant discharge pipe 216.

The lower shell 214 may form a low oil space V4 through which oil can be stored.

The oil storage space V4 may function as an oil chamber for supplying oil to the compression unit 200 so that the compressor can be smoothly operated.

In addition, a side surface of the cylindrical shell 211 may be provided with a refrigerant suction pipe 218 which is a passage through which the refrigerant to be compressed is introduced.

The refrigerant suction pipe 218 may be installed to penetrate the compression chamber S1 along the side of the fixed scroll 250.

The driving motor 220 may be installed at an upper portion of the casing 210.

Specifically, the drive motor 220 may include a stator 222 and a rotor 224.

Stator 222 may be cylindrical, for example, and may be secured to casing 210. The stator 222 has a plurality of slots (not shown) formed on the inner circumferential surface thereof so that the coil 222a is wound. In addition, a coolant flow path groove 212a may be formed on an outer circumferential surface of the stator 222 so as to pass through the coolant or oil discharged from the compression unit 200 by being cut in a D-cut shape.

The rotor 224 may be coupled to the inside of the stator 222 and generate rotational power. In addition, by rotating the rotary shaft 226 in the center of the rotor 224, the rotary shaft 226 together with the rotor 224 can be rotated. The rotational power generated by the rotor 224 is transmitted to the compression unit 200 through the rotation shaft 226.

The compression unit 200 may include an old dam ring 150, a main frame 230, a fixed scroll 250, a swing scroll 240, and a discharge cover 330.

The old dam ring 150 may be installed between the main frame 230 and the swing scroll 240. In addition, the old dam ring 150 may be keyed to the main frame 230 and the pivoting scroll 240, respectively, to prevent rotation of the pivoting scroll 240.

The main frame 230 may be provided below the driving motor 220 and may form an upper portion of the compression unit 200.

The main frame 230 includes a frame hard plate portion (hereinafter, referred to as a first hard plate portion) 232 having a substantially circular shape, and a frame bearing portion (232, through which the rotating shaft 226 penetrates) in the center of the first hard plate portion 232. The first bearing part 232a and the frame side wall part (hereinafter, the first side wall part) 231 protruding downward from the outer circumferential part of the first hard plate part 232 may be provided.

The first sidewall portion 231 may have an outer circumferential portion in contact with an inner circumferential surface of the cylindrical shell 211, and a lower end portion may contact the upper end portion of the fixed scroll sidewall portion 255 which will be described later.

The first sidewall portion 231 may be provided with a frame discharge hole (hereinafter referred to as a first discharge hole) 231a that penetrates the inside of the first sidewall portion 231 in the axial direction to form a refrigerant passage. The first discharge hole 231a may be connected to the outlet of the fixed scroll discharge hole 256b, which will be described later, and the outlet may be connected to the second space V2.

The first bearing part 232a may protrude from the upper surface of the first hard plate part 232 toward the driving motor 220. In addition, the first bearing portion 232a may be formed with a first bearing portion such that the main bearing portion 226c of the rotating shaft 226 which will be described later is penetrated.

That is, in the center of the main frame 230, the first bearing portion 232a, which is rotatably inserted and supported by the main bearing portion 226c of the rotating shaft 226 constituting the first bearing portion, may be formed in the axial direction. .

An oil pocket 232b may be formed on an upper surface of the first hard plate part 232 to collect oil discharged between the first bearing portion 232a and the rotation shaft 226.

Specifically, the oil pocket 232b may be intaglio formed on the upper surface of the first hard plate portion 232, and may be formed in an annular shape along the outer circumferential surface of the first bearing portion 232a.

The back pressure chamber S2 may be formed at the bottom of the main frame 230 to form a space together with the fixed scroll 250 and the swing scroll 240 to support the swing scroll 240 by the pressure of the space.

For reference, the back pressure chamber S2 may be an intermediate pressure region (ie, an intermediate pressure chamber), and the oil supply passage 226a provided in the rotation shaft 226 may be in a high pressure state in which pressure is higher than that of the back pressure chamber S2. . In addition, the space surrounded by the rotation shaft 226, the main frame 230, and the swing scroll 240 may be a high pressure region S3.

A back pressure seal 280 may be provided between the main frame 230 and the swing scroll 240 to distinguish the high pressure region S3 and the middle pressure region S2. The back pressure seal 280 may serve as a sealing member, for example.

In addition, the main frame 230 may be combined with the fixed scroll 250 to form a space in which the pivoting scroll 240 may be installed to be pivotable. That is, such a structure may be a structure surrounding the rotating shaft 226 so that the rotating power can be transmitted to the compression unit 200 through the rotating shaft 226.

The fixed scroll 250 forming the first scroll may be coupled to the bottom of the main frame 230.

In detail, the fixed scroll 250 may be provided under the main frame 230.

In addition, the fixed scroll 250 is a fixed scroll side plate portion (hereinafter referred to as a second hard plate portion) 254 having a substantially circular shape, a fixed scroll side wall portion (hereinafter referred to as a second projecting upward from the outer peripheral portion of the second hard plate portion 254) Fixed wrap that protrudes from the upper surface of the side wall portion 255 and the second hard plate portion 254 and engages (ie, engages with) the turning wrap 241 of the turning scroll 240 to be described later to form the compression chamber S1. 251 and a fixed scroll bearing portion (hereinafter referred to as a second bearing portion) 252 formed in the center of the rear surface of the second hard plate portion 254 and through which the rotating shaft 226 penetrates.

A discharge port 253 may be formed in the second hard plate part 254 to guide the compressed refrigerant from the compression chamber S1 to the internal space of the discharge cover 330. In addition, the position of the discharge port 253 may be arbitrarily set in consideration of the required discharge pressure.

Here, as the discharge port 253 is formed toward the lower shell 214, the fixed scroll discharge hole 256b to be described later so as to accommodate the refrigerant discharged and not mix the refrigerant with oil on the bottom of the fixed scroll 250. Discharge cover 330 for guiding to it may be combined. The discharge cover 330 may be sealingly coupled to the bottom surface of the fixed scroll 250 to separate the discharge flow path of the refrigerant and the oil storage space V4.

A stopper seat 320 having a discharge valve 317 for opening and closing the discharge port 253 between the fixed scroll 250 and the discharge cover 330, and a valve stopper 327 for limiting the movable range of the discharge valve 317. ) Is provided with a stopper sheet 320.

In this case, the valve seat 310, the stopper seat 320, and the discharge cover 330 are fastened together by being fixed to one surface of the fixed scroll 250 by the fixing member 340. Detailed description of the simultaneous fastening structure of the valve seat 310, the stopper seat 320 and the discharge cover 330 will be described later.

In addition, the through hole 332a is connected to the sub bearing part 226g of the rotating shaft 226 forming the second bearing part so that the oil feeder 271 immersed in the oil storage space V4 of the casing 210 passes through the discharge cover 330. ) May be formed.

On the other hand, the second side wall portion 255 may have an outer circumference portion contacting the inner circumferential surface of the cylindrical shell 211, and an upper end portion may contact the lower end portion of the first side wall portion 231.

The second side wall portion 255 also penetrates the inside of the second side wall portion 255 in the axial direction to form a refrigerant passage together with the first discharge hole 231a (hereinafter, referred to as a second discharge hole). ) 256b may be provided.

The second discharge hole 256b may be formed to correspond to the first discharge hole 231a, the inlet may be connected to the inner space of the discharge cover 330, and the outlet may be connected to the inlet of the first discharge hole 231a. .

Here, the second discharge hole 256b and the first discharge hole 231a may be configured to guide the refrigerant discharged from the compression chamber S1 into the internal space of the discharge cover 330 to the second space V2. The space V3 and the second space V2 may be connected.

In addition, the second side wall part 255 may be installed such that the refrigerant suction pipe 218 is connected to the suction side of the compression chamber S1. In addition, the refrigerant suction pipe 218 may be installed to be spaced apart from the second discharge hole 256b.

The second bearing part 252 may protrude from the lower surface of the second hard plate part 254 toward the storage space V4.

In addition, the second bearing portion 252 may be provided with a second bearing portion so that the sub-bearing portion 226g of the rotating shaft 226 is inserted and supported.

The second bearing portion 252 may be bent toward the center of the shaft such that the lower end portion supports the lower end of the sub bearing portion 226g of the rotation shaft 226 to form a thrust bearing surface.

A pivoting scroll 240 may be installed between the main frame 230 and the fixed scroll 250 to form a second scroll.

Specifically, the swinging scroll 240 may be coupled to the rotating shaft 226 to form two pairs of compression chambers S1 between the fixed scroll 250 and the pivoting movement.

In addition, the pivoting scroll 240 is a pivoting scroll swivel plate part (hereinafter referred to as a third hard plate part) 245 having a substantially circular shape, and a swivel wrap that protrudes from the lower surface of the third hard plate part 245 to engage with the fixed wrap 251 241 and a rotation shaft coupling portion 242 which is provided at the center of the third hard plate portion 245 and rotatably coupled to the eccentric portion 226f to be described later of the rotation shaft 226.

In the case of the swinging scroll 240, the outer circumferential portion of the third hard plate portion 245 is positioned at the upper end of the second side wall portion 255, and the lower end of the swing wrap 241 is in close contact with the upper surface of the second hard plate portion 254. It may be supported by the fixed scroll 250.

The outer circumferential portion of the rotating shaft coupling portion 242 is connected to the turning wrap 241 to form a compression chamber S1 together with the fixed wrap 251 in the compression process.

For reference, the fixed wrap 251 and the swing wrap 241 may be formed in an involute shape, but may be formed in various other shapes.

Here, the involute shape means a curve that corresponds to the trajectory that the end of the yarn draws when unwinding the yarn wound around the base circle with an arbitrary radius.

In addition, the eccentric portion 226f of the rotation shaft 226 may be inserted into the rotation shaft coupling portion 242. The eccentric portion 226f inserted into the rotation shaft coupling portion 242 may overlap the turning wrap 241 or the fixed wrap 251 in the radial direction of the compressor.

Here, the radial direction may mean a direction orthogonal to the axial direction (ie, up and down direction) (ie, the left and right direction), and more specifically, the radial direction may mean a direction from the outside of the rotation axis toward the inside. .

As described above, when the eccentric portion 226f of the rotating shaft 226 penetrates through the hard plate portion 245 of the revolving scroll 240 and radially overlaps the revolving wrap 241, the repulsive force and the compressive force of the refrigerant are hard plate portions. Based on the reference numeral 245 may be applied to the same plane and partially offset each other.

The rotary shaft 226 is coupled to the driving motor 220 and may include an oil supply passage 226a for guiding oil contained in the oil storage space V4 of the casing 210 to the top.

Specifically, the rotating shaft 226 may be coupled to the upper portion of the rotor 224 is pressed in the center, the lower portion is coupled to the compression unit 200 can be supported radially.

As a result, the rotation shaft 226 may transmit the rotational force of the driving motor 220 to the swing scroll 240 of the compression unit 200. In addition, the pivoting scroll 240 eccentrically coupled to the rotating shaft 226 through the pivoting movement with respect to the fixed scroll (250).

The main bearing part 226c may be formed below the rotating shaft 226 so as to be inserted into the first bearing part 232a of the main frame 230 and supported in the radial direction. In addition, a sub bearing part 226g may be formed below the main bearing part 226c to be inserted into the second bearing part 252 of the fixed scroll 250 to be radially supported.

In addition, an eccentric portion 226f may be formed between the main bearing portion 226c and the sub bearing portion 226g to be inserted into and coupled to the rotation shaft coupling portion 242 of the swing scroll 240.

The main bearing portion 226c and the sub bearing portion 226g may be formed coaxially to have the same axis center. On the other hand, the eccentric portion 226f may be formed to be radially eccentric with respect to the main bearing portion 226c or the sub bearing portion 226g.

For reference, the eccentric portion 226f may have an outer diameter smaller than the outer diameter of the main bearing portion 226c and larger than the outer diameter of the sub bearing portion 226g. In this case, it may be advantageous to couple the rotating shaft 226 through each of the bearing parts 232a and 252 and the rotating shaft coupling part 242.

On the other hand, the eccentric portion 226f may not be integrally formed on the rotation shaft 226 but may be formed using a separate bearing. In this case, the rotating shaft 226 is inserted into and coupled to the respective bearing portions 232a and 252 and the rotating shaft coupling portion 242 without the outer diameter of the sub bearing portion 226g being smaller than the outer diameter of the eccentric portion 226f. Can be.

In addition, an oil supply passage 226a may be formed in the rotation shaft 226 to supply the oil in the oil storage space V4 to the outer circumferential surface of each bearing portion 226c and 226g and the outer circumferential surface of the eccentric portion 226f. In addition, oil holes 228b, 228d, and 228e penetrating to the outer circumferential surface of the oil supply passage 226a may be formed in the bearing portion and the eccentric portions 226c, 226g, and 226f of the rotation shaft 226.

For reference, the oil guided upward through the oil supply passage 226a may be discharged through the oil holes 228b, 228d, and 228e and supplied to the bearing surface.

An oil feeder 271 for pumping oil filled in the oil storage space V4 may be coupled to a lower end of the rotation shaft 226, that is, a lower end of the sub bearing part 226g.

The oil feeder 271 is an oil supply pipe 273 inserted into and coupled to the oil supply flow path 226a of the rotation shaft 226, and an oil suction member 274 inserted into the oil supply pipe 273 to suck oil. Can be done.

Here, the oil supply pipe 273 may be installed to pass through the through hole 332a of the discharge cover 330 to be immersed in the oil storage space V4, and the oil suction member 274 may function as a propeller.

Although not shown in the drawings, a trochoid pump (not shown) may be coupled to the sub-bearing portion 226g to forcibly pump oil filled in the oil storage space V4 to the top instead of the oil feeder 271. have.

In addition, although not shown in the drawings, the scroll compressor according to the embodiment of the present invention includes a first sealing member (not shown) for sealing a gap between the upper end of the main bearing portion 226c and the upper end of the main frame 230; A second sealing member (not shown) may be further included to seal a gap between the lower end of the sub bearing part 226g and the lower end of the fixed scroll 250.

For reference, it is possible to prevent the oil from flowing out of the compression unit 200 along the bearing surface through the first and second sealing members, thereby enabling the implementation of a differential pressure oil supply structure and preventing backflow of the refrigerant. Can be.

A balance weight 227 for suppressing noise and vibration may be coupled to the rotor 224 or the rotating shaft 226.

For reference, the balance weight 227 may be provided between the driving motor 220 and the compression unit 200, that is, in the second space V2.

Subsequently, the operation process of the scroll compressor 1 according to the embodiment of the present invention is as follows.

When power is applied to the driving motor 220 to generate a rotational force, the rotating shaft 226 coupled to the rotor 224 of the driving motor 220 rotates. Then, the swinging scroll 240 eccentrically coupled to the rotating shaft 226 forms a compression chamber S1 between the pivoting wrap 241 and the fixed wrap 251 while pivoting about the fixed scroll 250. Compression chamber (S1) may be formed in a number of steps in succession, gradually narrowing in the center direction.

Then, the refrigerant supplied through the refrigerant suction pipe 218 from the casing 210 may directly flow into the compression chamber S1. The refrigerant is compressed while moving in the direction of the discharge chamber of the compression chamber S1 by the swinging movement of the swing scroll 240, and then from the discharge chamber to the third space V3 through the discharge port 253 of the fixed scroll 250. Can be discharged.

Thereafter, the compressed refrigerant discharged into the third space V3 is discharged into the internal space of the casing 210 through the second discharge hole 256b and the first discharge hole 231a, and then the refrigerant discharge pipe 216. Through a series of processes to be discharged to the outside of the casing 210 is repeated.

Hereinafter, the simultaneous fastening structure of the valve seat 310, the stopper seat 320, and the discharge cover 330 coupled to the fixed scroll 250 of FIG. 1 will be described with reference to FIGS. 2 to 10.

FIG. 2 is a partial perspective view showing components coupled onto the fixed scroll of FIG. 1. 3 is an exploded perspective view of the components coupled onto the fixed scroll of FIG. 1; 4 is a plan view illustrating the valve seat of FIG. 3. FIG. 5 is a plan view illustrating the stopper sheet of FIG. 3. FIG. 6 is a perspective view illustrating the discharge cover of FIG. 3.

2 is a view showing the discharge cover 330 transparent to display the upper surface of the valve seat 310 and the stopper seat 320.

2 to 6, the fixed scroll 250 of the scroll compressor 1 according to the embodiment of the present invention has a valve seat 310, a stopper seat 320, and a discharge cover 330 on one surface thereof. Are arranged sequentially.

Specifically, the valve seat 310 is in contact with one surface of the fixed scroll 250, and is formed in a plate shape of a constant thickness. The valve seat 310 may be formed of a metal or nonmetal material having a certain elasticity.

In the center of the valve seat 310, a first through hole 312 that is engageable with the second bearing portion 252 of the fixed scroll 250 is formed.

On the outer circumferential surface of the valve seat 310, at least one first fastening hole 314 through which the fixing member 340 is coupled, and a first through hole 316b communicating with the second discharge hole 256b to move the refrigerant. Is formed. For reference, the first through hole 316b may be formed in the same size and shape as the second discharge hole 256b, but this is merely an example and the present invention is not limited thereto.

Inside the valve seat 310, a discharge valve 317 is formed to open and close the discharge port 253 of the fixed scroll 250. The valve seat 310 may have the same number of discharge valves 317 as the discharge holes 253 formed on the fixed scroll 250. Here, the number of discharge ports 253 of the fixed scroll 250 and the number of discharge valves 317 provided in the valve seat 310 may be the same.

The shape of the discharge valve 317 is defined by the valve etch groove 318. That is, the shape of the discharge valve 317 is determined by the valve etching groove 318 formed in the valve seat 310. At this time, the discharge valve 317 is formed so that one side is connected to the valve seat 310 and the other side is bent from the valve seat 310 by elasticity.

In this case, the valve etching grooves 318 are formed at regular intervals along the outer circumferential surface of the discharge valve 317. However, the present invention is not limited thereto and the thickness of the valve etch groove 318 may be different for each position, as shown in the drawing.

The discharge valve 317 is composed of a valve head portion 317a which is formed in a substantially circular shape so as to overlap the discharge port 253 of the fixed scroll 250, and a valve body portion 317b that is formed to extend in the same thickness. At this time, the diameter of the valve head portion 317a may be larger than the width of the valve body portion 317b. For reference, the shape and size of the valve head portion 317a and the valve body portion 317b may be variously modified and implemented.

The stopper seat 320 is in contact with one surface of the valve seat 310 and is formed in a plate shape having a constant thickness.

In this case, the stopper sheet 320 is formed thicker than the thickness of the stopper sheet 320. The valve stopper 327 may be formed of a metal or non-metal material that is formed to a thickness of a predetermined size or more and is not easily changed in shape. In addition, the stopper seat 320 may be formed of a material that is stronger than the valve seat 310.

A second through hole 322 that is engageable with the second bearing portion 252 of the fixed scroll 250 is formed at the center of the stopper sheet 320. The second through hole 322 may be formed in the same size and shape as the first through hole 312 described above.

On the outer circumferential surface of the stopper sheet 320, the refrigerant moves in communication with at least one second fastening hole 324 through which the fixing member 340 is coupled, and the second discharge hole 256b and the first through hole 316b. The second through hole 326b is formed. For reference, the second through hole 326b may be formed in the same size and shape as the second discharge hole 256b and the first through hole 316b, but this is only one example and the present invention is limited thereto. It is not.

A valve stopper 327 is formed inside the stopper seat 320 to limit the movable range of the discharge valve 317. The valve stopper 327 is located above the discharge valve 317 so as to overlap with the discharge valve 317.

The valve stopper 327 is formed to be bent outwardly away from the discharge valve 317 toward the end. That is, the valve stopper 327 protrudes from the upper surface of the stopper seat 320 and is formed to be farther from the upper surface of the stopper seat 320 toward the end.

For reference, since the discharge valve 317 is formed to be thinner than the valve stopper 327, the discharge valve 317 may be bent outward by a refrigerant having a predetermined pressure or higher to open the discharge port 253. However, when the discharge valve 317 is bent over a predetermined range, the discharge valve 317 may lose elasticity and may not return to its original position.

Therefore, the valve stopper 327 is disposed above the discharge valve 317 to perform a function of guiding the discharge valve 317 so as not to bend over a predetermined range. That is, the discharge valve 317 guides the valve stopper 327 to bend only to the portion which is bent outward. In other words, the valve stopper 327 performs a function of controlling the maximum opening amount of the discharge valve 317.

At this time, the stopper seat 320 includes the same number of valve stoppers 327 as the discharge valve 317 formed on the valve seat 310. Therefore, the number of discharge ports 253 of the fixed scroll 250 and the number of valve stoppers 327 provided in the stopper seat 320 may be the same.

The valve stopper 327 has a shape defined by the stopper etch groove 328. The shape of the valve stopper 327 is determined by the stopper etch groove 328 formed in the stopper seat 320. The valve stopper 327 is formed such that one side is connected to the stopper seat 320 and the other side protrudes from the stopper seat 320 to bend outward.

In this case, the stopper etching groove 328 is formed along the outer circumferential surface of the valve stopper 327.

The valve stopper 327 is composed of a stopper head portion 327a that is formed in a substantially circular shape so as to overlap the discharge valve 317 of the valve seat 310, and a stopper body portion 327b that extends and is formed to have the same thickness. In this case, the diameter of the stopper head portion 327a may be larger than the width of the stopper body portion 327b.

For reference, the stopper head portion 327a and the stopper body portion 327b have shapes and sizes similar to those of the valve head portion 317a and the valve body portion 317b, and may be variously modified.

In addition, the thickness of the stopper etching groove 328 may be formed differently for each position. For example, the stopper etching groove 328 may include a first etching portion 328a defining the stopper head portion 327a and a second etching portion 328b defining the stopper body portion 327b. In this case, an interval of the first etching portion 328a may be greater than an interval of the second etching portion 328b. However, this is merely an example and the present invention is not limited thereto.

The discharge cover 330 is in contact with one surface of the stopper sheet 320 and forms a discharge chamber (that is, the third space V3 described above) inside.

The discharge cover 330 may have a substantially circular discharge cover hard plate portion (hereinafter referred to as a third hard plate portion) 335 and a discharge cover side wall portion protruding to one side from an outer circumferential portion of the third hard plate portion 335 (hereinafter, referred to as a third). Side wall portion 333 and a fixing portion 331 protruding outward from an end of the third side wall portion 333.

The through hole 332a is formed in the center of the third hard plate part 335 to allow the oil feeder 271 to be immersed in the oil storage space V4 to pass therethrough. A discharge cover bearing part (hereinafter referred to as a third bearing part) 332 coupled to the second bearing part 252 of the fixed scroll 250 is formed below the third hard plate part 335. The third bearing portion 332 may be formed along the outer circumferential surface of the through hole 332a.

The third side wall portion 333 has a height determined according to the size of the discharge chamber, and is formed to be spaced apart from the inner circumferential surface of the cylindrical shell 211. An end portion of the third sidewall portion 333 is provided on the fixed scroll 250 to contact the upper surface of the stopper sheet 320.

The fixing part 331 protrudes outward from an end of the third side wall part 333 and is formed to have a diameter larger than that of the third side wall part 333. The fixing part 331 includes at least one third fastening hole 334 through which the fixing member 340 is coupled. The third fastening hole 334 may be formed at a position corresponding to the coupling hole 254a of the fixed scroll 250.

In addition, the fixing part 331 includes a flow path groove 331a which is formed to be concave inward to form an oil flow path.

 For reference, the position and shape of the third fastening hole 334 and the flow path groove 331a may be formed to correspond to the shape of the coupling hole 254a and the flow path groove formed on the sidewall of the fixed scroll 250.

The third bearing portion 332 is coupled to the second bearing portion 252 of the fixed scroll 250 to prevent the refrigerant from leaking between the fixed scroll 250 or the oil feeder 271 inside the discharge cover 330. do.

For reference, the third bearing portion 332 may be modified in various forms different from those shown in the drawings. For example, the third bearing portion 332 may be formed to be in contact with only the sidewall of the oil feeder 271 and spaced apart from the upper surface of the second bearing portion 252. In addition, although the third bearing portion 332 may be omitted, the present invention is not limited thereto.

The fixing member 340 fastens and fixes the valve seat 310, the stopper seat 320, and the discharge cover 330 sequentially stacked on one surface of the fixed scroll 250.

On one surface of the fixed scroll 250, a coupling hole (254a of FIG. 7) that can be coupled to the fixed member 340 is formed.

In this case, the discharge valve 317 includes a first fastening hole 314 formed at a position corresponding to the coupling hole 254a of the fixed scroll 250. The stopper seat 320 includes a second fastening hole 324 formed at a position corresponding to the first fastening hole 314 of the discharge valve 317. The discharge cover 330 includes a third fastening hole 334 formed at a position corresponding to the second fastening hole 324 of the stopper sheet 320.

The fixing member 340 is coupled to the coupling hole 254a of the fixed scroll 250 by passing through the first to third fastening holes 314, 324, and 334. For example, a screw thread may be formed at an end of the fixing member 340, and a screw groove corresponding to the screw thread may be formed inside the coupling hole 254a. For reference, this coupling method is only one example, and the fixing member 340 may be fixed on the fixed scroll 250 using various coupling methods.

In summary, the fixing member 340 may firmly fix the valve seat 310, the stopper seat 320, and the discharge cover 330 sequentially stacked on one surface of the fixed scroll 250.

In this case, a plurality of first to third fastening holes 314, 324, and 334 are provided on the valve seat 310, the stopper seat 320, or the discharge cover 330, respectively, and the plurality of fixing members 340. It can be fixed on the fixed scroll 250 by.

In addition, although not clearly shown in the drawings, the adhesive layer or the valve seat 310, the stopper seat 320 and the stopper seat 320, or between the stopper seat 320 and the discharge cover 330 or A sealing layer can be formed.

The adhesive layer or the sealing layer may be formed by an adhesive material or a sealing material applied in the circumferential direction on the fixed scroll 250.

The adhesive layer and the sealing layer may prevent the refrigerant discharged into the lower discharge chamber (that is, the third space V3) formed inside the discharge cover 330 from leaking out of the discharge cover 330.

However, in another embodiment of the present invention, the fixing member 340 may be omitted. In this case, the valve seat 310, the stopper seat 320, and the discharge cover 330 may be fixed on the fixed scroll 250 by various fastening methods (for example, insert and lock structure).

That is, in the scroll compressor 1 of the present invention, the valve seat 310 includes a plurality of discharge valves 317 corresponding to the plurality of discharge ports 253 formed on the fixed scroll 250, and the stopper seat 320. Has a plurality of valve stoppers 327 corresponding to the plurality of discharge valves 317.

In addition, the discharge cover 330 is disposed on the valve seat 310 and the stopper seat 320 to form a lower discharge chamber, the fixing member 340 is the valve seat 310, the stopper seat 320 and the discharge cover 330 is firmly fixed on the fixed scroll 250.

That is, in the scroll compressor 1 of the present invention, the valve seat 310, the stopper seat 320, and the discharge cover 330 are simultaneously fastened on one surface of the fixed scroll 250 by the fixing member 340. Has a structure.

Through this, the present invention can omit the step of separately assembling the discharge valve 317 and the valve stopper 327 for each discharge port 253 of the fixed scroll 250.

Also, by fixing the discharge valve 317 and the valve stopper 327 together with the discharge cover 330, a process for fixing the discharge cover 330 may be unified.

That is, according to the present invention, by fastening the valve seat 310, the stopper seat 320, and the discharge cover 330 at the same time, the fastening structure can be simplified to reduce the number of processing steps required for the manufacture of the scroll compressor 1.

In addition, the common fastening structure of the present invention can reduce the labor required for the production of the product, manufacturing time and cost required for the production of the product.

7 is a cross-sectional view illustrating the structure of the compression unit of FIG. 1. FIG. 8 is an enlarged partial view of region S of FIG. 7.

7 and 8, the discharge port 253 provided in the fixed scroll 250 communicates with the compression chamber S1.

The discharge valve 317 is disposed to overlap the discharge port 253 to open and close the discharge port 253. The valve stopper 327 is disposed above the discharge valve 317 to limit the movable range of the discharge valve 317.

At this time, the upper surface of the second hard plate portion 254 of the fixed scroll 250 is formed flat to be in close contact with the valve seat 310. Accordingly, the upper surface of the second hard plate portion 254 and one surface of the valve seat 310 are disposed on the same plane.

For reference, in another embodiment of the present invention, the top surface of the fixed scroll 250 may be provided with a stepped groove structure for reducing the static friction by oil. Detailed description thereof will be described later.

In addition, one surface of the stopper seat 320 is disposed to be in contact with the other surface facing one surface of the valve seat 310. Therefore, one surface of the stopper seat 320 is disposed on the same plane as the other surface of the valve seat 310.

In addition, the fixing part 331 of the discharge cover 330 is disposed to contact the other surface facing one surface of the stopper sheet 320. Therefore, the lower surface of the fixing part 331 of the discharge cover 330 and the other surface of the stopper sheet 320 are disposed on the same plane.

The fixing member 340 fixes the valve seat 310, the stopper seat 320, and the discharge cover 330 sequentially stacked on one surface of the fixed scroll 250.

On one surface of the fixed scroll 250, a coupling hole 254a that can be coupled to the fixed member 340 is formed. The discharge valve 317 includes a first fastening hole 314 formed at a position corresponding to the coupling hole 254a of the fixed scroll 250. The stopper seat 320 includes a second fastening hole 324 formed at a position corresponding to the first fastening hole 314 of the discharge valve 317. The discharge cover 330 includes a third fastening hole 334 formed at a position corresponding to the second fastening hole 324 of the stopper sheet 320.

The fixing member 340 is coupled to the coupling hole 254a of the fixed scroll 250 by passing through the first to third fastening holes 314, 324, and 334. Through this, the valve seat 310, the stopper seat 320 and the discharge cover 330 are simultaneously fastened and fixed on one surface of the fixed scroll 250 by the fixing member 340.

The coupling structure between the fixed scroll 250, the valve seat 310, the stopper seat 320, and the discharge cover 330 may be simplified. Accordingly, the coupling force between the fixed scroll 250, the valve seat 310, the stopper seat 320 and the discharge cover 330 may be stronger than the conventional scroll compressor.

As a result, the amount of refrigerant leaking between the fixed scroll 250 and the discharge cover 330 may be reduced, and as the amount of refrigerant leakage is reduced, the operation efficiency and operation stability of the scroll compressor may be improved.

9 and 10 are cross-sectional views illustrating a scroll compressor according to another embodiment of the present invention. Hereinafter, the descriptions common to the above descriptions will be omitted and the differences will be described.

9 and 10, in the scroll compressor 2 according to another exemplary embodiment of the present invention, the second hard plate portion 254 of the fixed scroll 250 may have a stepped groove 254h etched inwardly on an upper surface thereof. It is provided. In addition, the second hard plate portion 254 includes a round portion 254R which protrudes from the step groove 254h along the outer circumferential surface of the discharge port 253.

Although not clearly shown in the drawing, the stepped groove 254h may be formed only on an area overlapping the discharge valve 317. However, the position or size of the stepped groove 254h may be variously modified.

At this time, one end of the discharge valve 317 is fixed on the valve seat 310 by the fixing member 340, the other end is located on the round portion 254R to form a free end to open and close the discharge port 253. .

Specifically, the lower surface of one end of the discharge valve 317 may contact the upper surface of the second hard plate portion 254. The lower surface of the other end of the discharge valve 317 may be in contact with the uppermost surface (or the uppermost contact point) of the round portion 254R. The center portion of the discharge valve 317 may be formed to be spaced apart from the second hard plate portion 254 by the stepped groove 254h.

At this time, as the cross section of the round portion 254R forms a curve, the contact area between the discharge valve 317 and the round portion 254R can be minimized.

The contact area of the discharge valve 317 and the round part 254R is related to the static frictional force by oil.

For example, when the contact area of the discharge valve 317 and the round part 254R is large, the static frictional force by oil becomes large, and since the pressure of the compression chamber in which the discharge valve 317 starts to open becomes large, As a result, overcompression occurs in the compression chamber. When such overcompression occurs, the compressor may be reduced in compression efficiency due to overcompression loss.

On the other hand, when the contact area between the discharge valve 317 and the round portion 254R is small, the static frictional force caused by the oil is reduced to reduce the overcompression loss and the compression efficiency can be increased.

The valve stopper 327 may be disposed on the discharge valve 317.

One end of the valve stopper 327 may be fixed to the stopper seat 320, and the other end may be formed to be bent outwardly away from the discharge hole 253. One side of the bottom surface of the valve stopper 327 may be in contact with the top surface of the discharge valve 317, and the other side thereof may be spaced apart from the discharge valve 317.

In this case, the valve stopper 327 functions to limit the angle at which the discharge valve 317 is bent so that the discharge valve 317 is not bent above a predetermined angle.

Referring to FIG. 10, when the pressure of the compression chamber connected to the discharge port 253 is increased, the discharge valve 317 receives a force F in an upward direction of the round part 254R, and thus is close to the valve stopper 327. Can be bent to lose.

Accordingly, the refrigerant compressed in the compression chamber connected to the discharge port 253 is discharged into the space between the discharge valve 317 and the discharge port 253 to move into the discharge cover 330.

Accordingly, the scroll compressor 2 according to another embodiment of the present invention can implement accurate operation of the discharge valve 317 by reducing the static friction caused by oil generated between the discharge valve 317 and the discharge port 253. Do.

Accordingly, the present invention can reduce the loss due to overcompression during the operation of the compressor, thereby improving the operation efficiency of the compressor and improving the operation stability of the scroll compressor 2.

In addition, although not clearly illustrated in the drawings, the valve seat 310, the stopper seat 320, and the discharge cover 330 may be integrally formed and coupled to the fixed scroll 250. However, this is merely an example and the present invention is not limited thereto.

It is to be understood that the foregoing embodiments are illustrative in all respects and not restrictive, the scope of the invention being indicated by the claims that follow, rather than the foregoing detailed description. And the meaning and scope of the claims to be described later, as well as all changes and modifications derived from the equivalent concept should be construed as being included in the scope of the invention.

200: compression unit 210: casing
220: drive motor 226: rotating shaft
230: main frame 240: turning scroll
250: fixed scroll 310: valve seat
320: stopper sheet 330: discharge cover
340: fixing member

Claims (18)

Casing;
A main frame fixed to an inner space of the casing;
A fixed scroll disposed on one side of the main frame and provided with a discharge port;
A pivoting scroll disposed between the main frame and the fixed scroll and forming a compression chamber between the fixed scroll;
A valve seat disposed on one surface of the fixed scroll and including a discharge valve for opening and closing the discharge port of the fixed scroll in communication with the compression chamber;
A stopper seat disposed on the valve seat and including a valve stopper for limiting a movable range of the discharge valve;
A discharge cover disposed on the stopper sheet; And
And a fixing member for fixing the valve seat, the stopper seat, and the discharge cover to the fixed scroll.
Scroll compressor.
According to claim 1,
The fixed scroll includes a coupling hole formed on one surface and coupled to the fixing member,
The valve seat includes a first fastening hole formed at a position corresponding to the coupling hole,
The stopper sheet includes a second fastening hole formed at a position corresponding to the first fastening hole,
The discharge cover includes a third fastening hole formed at a position corresponding to the second fastening hole,
The fixing member is fixed to the coupling hole through the first to third fastening holes
Scroll compressor.
According to claim 1,
The fixed scroll includes a plurality of discharge ports,
The valve seat includes a plurality of discharge valves formed at positions corresponding to the plurality of discharge ports,
The plurality of discharge valves are separated by a valve etching groove formed on the valve seat, and are formed to be rotatable from the valve seat.
Scroll compressor.
The method of claim 3, wherein
The valve etching grooves are formed at regular intervals along the outer circumferential surface of the discharge valve.
Scroll compressor.
The method of claim 3, wherein
The stopper seat includes a plurality of valve stoppers formed at positions corresponding to the plurality of discharge valves,
The plurality of valve stoppers are defined by a stopper etch groove on the stopper seat.
Scroll compressor.
The method of claim 5,
The valve stopper is formed to protrude to the outside of the stopper seat so as to move away from the upper surface of the stopper seat toward the end
Scroll compressor.
The method of claim 5,
The stopper etching groove,
First etching portions formed at first intervals along an outer circumferential surface of the head of the valve stopper;
The second etching portion is formed along the outer circumferential surface of the body of the valve stopper at a second interval different from the first interval.
Scroll compressor.
According to claim 1,
The fixed scroll,
A stepped groove formed to have a step inward in an area overlapping with the discharge valve;
It includes a round portion protruding from the step groove along the outer peripheral surface of the discharge port
Scroll compressor.
According to claim 1,
One surface of the fixed scroll is formed to be disposed on the same plane as one surface of the valve seat,
The other surface of the valve seat is disposed on the same plane to contact one surface of the stopper seat,
The lower surface of the fixing part of the discharge cover is disposed on the same plane to contact the other surface of the stopper sheet.
Scroll compressor.
According to claim 1,
The valve seat includes a first through hole formed in a shape that can be coupled to the bearing portion of the fixed scroll,
The stopper sheet includes a second through hole formed in a shape that can be coupled to the bearing portion of the fixed scroll,
The discharge cover includes a discharge cover bearing portion coupled to an upper portion of the bearing portion of the fixed scroll.
Scroll compressor.
According to claim 1,
The valve seat is formed to the same thickness, and formed with a different thickness than the stopper seat
Scroll compressor.
According to claim 1,
The fixed scroll and the swing scroll each include a discharge hole for forming a refrigerant flow passage in communication with the inner space of the casing,
The discharge cover forms a closed space on the fixed scroll such that the refrigerant discharged through the discharge port in the compression chamber is guided to the refrigerant flow path through the discharge hole.
Scroll compressor.
Casing;
A drive motor having a stator fixed in the casing and a rotor rotatably installed in the stator;
A rotating shaft coupled to the rotor and rotating together with the rotor;
A main frame installed along the rotation shaft and provided below the drive motor;
A fixed scroll disposed below the main frame along the rotation axis and having a discharge port;
A pivoting scroll provided between the main frame and the fixed scroll, the rotating shaft being eccentrically coupled, and pivoting engaged with the fixed scroll to form the fixed scroll and the compression chamber;
A valve seat coupled to a lower surface of the fixed scroll and including a discharge valve for opening and closing the discharge port of the fixed scroll in communication with the compression chamber;
A stopper seat coupled to a lower surface of the valve seat and including a valve stopper for limiting a movable range of the discharge valve; And
A discharge cover coupled to a lower surface of the stopper sheet and configured to guide the refrigerant discharged through the discharge port to discharge holes connected to an upper portion of the casing;
Scroll compressor.
The method of claim 13,
The fixed scroll includes a coupling hole formed in the lower surface,
The valve seat includes a first fastening hole formed at a position corresponding to the coupling hole,
The stopper sheet includes a second fastening hole formed at a position corresponding to the first fastening hole,
The discharge cover includes a third fastening hole formed at a position corresponding to the second fastening hole,
Further comprising a fixing member fixed to the coupling hole through the first to third fastening holes
Scroll compressor.
The method of claim 13,
The fixed scroll includes a plurality of discharge ports,
The valve seat includes a plurality of discharge valves formed at positions corresponding to the plurality of discharge ports,
The plurality of discharge valves are separated by a valve etching groove formed on the valve seat, and are formed to be rotatable from the valve seat.
Scroll compressor.
The method of claim 15,
The stopper seat includes a plurality of valve stoppers formed at positions corresponding to the plurality of discharge valves,
The plurality of valve stoppers are defined by a stopper etch groove on the stopper seat.
Scroll compressor.
The method of claim 13,
The fixed scroll,
A stepped groove formed to have a step inward in an area overlapping with the discharge valve;
It includes a round portion protruding from the step groove along the outer peripheral surface of the discharge port
Scroll compressor.
The method of claim 13,
The valve seat includes a first through hole formed in a shape that can be coupled to the bearing portion of the fixed scroll,
The stopper sheet includes a second through hole formed in a shape that can be coupled to the bearing portion of the fixed scroll,
The discharge cover includes a discharge cover bearing portion coupled to an upper portion of the bearing portion of the fixed scroll.
Scroll compressor.

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