KR102412848B1 - Scroll compressor - Google Patents

Abstract

The present invention relates to a scroll compressor provided with a discharge guide for guiding refrigerant discharged from a compression unit to a discharge space or a storage oil space. Disclosed is a scroll compressor comprising: a stator in which an additional depression is formed; and a discharge guide disposed between a main frame groove portion and the stator groove portion to guide refrigerant passing through the frame groove portion to a discharge space or an oil storage space.

Description

Scroll Compressor {SCROLL COMPRESSOR}

The present invention relates to a scroll compressor, and more particularly, to a scroll compressor having a discharge guide for guiding refrigerant discharged from a compression unit to a discharge space or a storage space.

A compressor refers to a device that compresses a fluid to discharge a high-pressure fluid or operates a machine using energy generated when the high-pressure fluid is released.

A scroll compressor is a type of compressor, and after compressing the refrigerant fluid introduced between the fixed scroll and the orbiting scroll, it is discharged at a high pressure in the discharge space.

Specifically, the orbiting scroll orbits with respect to the fixed scroll, and the refrigerant fluid introduced between the fixed scroll and the orbiting scroll is compressed. The compressed refrigerant fluid is discharged to the outside of the scroll compressor through the discharge space.

At this time, the oil is supplied between the components in which the rotational motion is generated, thereby smoothing the rotational motion of each component.

The oil is supplied to the bearing or compression unit of the scroll compressor from the oil storage space provided inside the scroll compressor, and then circulates in the scroll compressor while repeating the process of being returned to the oil storage space.

In the upper compression type scroll compressor, which is a type of scroll compressor, the compression unit is disposed above the transmission unit. In addition, in the upper compression scroll compressor, the refrigerant discharged from the fixed scroll flows into the discharge space through the side groove portion of the main frame.

At this time, if all the refrigerant passing through the side groove of the main frame flows into the discharge space, the motor may not be sufficiently cooled, and there is a possibility that the refrigerant and oil may not be sufficiently separated. This can lead to reduced motor and compressor efficiency.

In order to prevent the above problem, the discharge guide may be coupled to the lower side of the side groove of the main frame.

The discharge guide guides a portion of the refrigerant passing through the side groove of the main frame to the discharge space, and guides the remaining portion to the oil storage space.

However, while the refrigerant passes through the discharge guide, stress may be concentrated in a specific portion of the discharge guide. In this case, there is a possibility that the discharge guide and the scroll compressor are damaged.

In addition, when the ratio of the flow rate of the refrigerant flowing into the discharge space to the flow rate of the refrigerant flowing into the oil storage space is not properly set, the cooling effect of the motor or the oil separation effect between the refrigerant and the oil may be reduced.

Korean Patent Application Laid-Open No. 10-2015-0031111 discloses a high-pressure scroll compressor. Specifically, a high-pressure scroll compressor in which a discharge valve is provided in a space to open and close a communication portion between a compression chamber and the space is disclosed.

However, in this type of high-pressure scroll compressor, the refrigerant discharged from the compression chamber flows into the discharge space. That is, the refrigerant discharged from the compression chamber does not flow into the oil storage space. Therefore, the oil storage space is not sufficiently cooled.

Korean Patent Application Laid-Open No. 10-2020-0068938 discloses a high-pressure scroll compressor. Specifically, a high-pressure scroll compressor having a bypass unit for selectively bypassing a refrigerant in a compression chamber to a space inside a body is disclosed.

However, also in this type of high-pressure scroll compressor, the refrigerant passing through the bypass unit flows into the space inside the body and does not flow into the storage space. Therefore, there is a limit to cooling the oil storage space.

Korean Patent Publication No. 10-2015-0031111 (2015.03.23.) Korean Patent Publication No. 10-2020-0068938 (2020.06.16.)

SUMMARY OF THE INVENTION One object of the present invention is to provide a scroll compressor in which a portion of refrigerant discharged from a compression unit flows into a storage oil space and a remaining portion flows into a discharge space by a discharge guide.

Another object of the present invention is to provide a scroll compressor in which the structure of the discharge guide is more simplified.

Another object of the present invention is to provide a scroll compressor in which refrigerant is discharged to a discharge space and an oil storage space in an area ratio optimized for a preset driving condition.

Another object of the present invention is to provide a scroll compressor in which an oil discharge amount is further reduced.

In order to achieve the above object, a scroll compressor according to an embodiment of the present invention, a fixed scroll; an orbiting scroll coupled to one side of the fixed scroll to form a compression chamber; a main frame formed in a cylindrical shape extending in one direction, a frame groove extending in the one direction is recessed on an outer circumferential surface, and coupled to the one side of the fixed scroll and the orbiting scroll with the orbiting scroll interposed therebetween; a stator formed in a cylindrical shape extending in the one direction, spaced apart from the lower end of the main frame by a predetermined distance, and having a stator groove extending in the one direction recessed on an outer circumferential surface; a casing extending in the one direction and accommodating the fixed scroll, the orbiting scroll, the main frame and the stator therein; and a discharge guide disposed between the frame groove portion and the stator groove portion and coupled to an inner circumferential surface of the casing, wherein the discharge guide extends in the one direction and is recessed toward the radially inner side of the casing, a discharge guide groove portion in which a distance between the inner side and the casing is smaller than a distance between the innermost side of the frame groove portion and the casing; and a discharge guide flange portion extending from the discharge guide groove portion in a direction different from the one direction and formed to be expanded, and disposed adjacent to an inner circumferential surface of the casing.

In addition, the flow cross-sectional area of the fluid passing between the inner surface of the frame groove part and the outer surface of the discharge guide groove part is a predetermined first value, and the inner peripheral surface of the casing, the inner surface of the frame groove part, and the inside of the discharge guide groove part A flow cross-sectional area of the fluid passing between the side surfaces may be a predetermined second value, and an area ratio of the first value to the sum of the first value and the second value may be a predetermined first area ratio.

Also, the first area ratio may be 0.6 or more and 0.7 or less.

Also, the discharge guide may be spaced apart from the lower end of the main frame by a predetermined distance.

In addition, the flow cross-sectional area of the fluid passing between the inner surface of the lower end of the frame groove and the outer surface of the upper end of the discharge guide groove is a predetermined third value, and the inner peripheral surface of the casing, the inner surface of the frame groove, and the discharge guide groove A flow cross-sectional area of the fluid passing between the inner surfaces of the part may be a predetermined fourth value, and an area ratio of the third value to the sum of the third value and the fourth value may be a preset second area ratio.

In addition, the second area ratio may be 0.6 or more and 0.7 or less.

In addition, the discharge guide may include a discharge guide extension that is formed to protrude from an upper end of the discharge guide groove toward the frame groove.

Also, the discharge guide may have a predetermined cross-section extending in the one direction.

In addition, the discharge guide groove, inner and outer edges of the upper end may be chamfered (tapered).

Also, a cross-sectional area of the discharge guide may be reduced in a direction toward the frame groove portion.

In addition, a plurality of the frame grooves and the discharge guide grooves may be provided, and the number of the discharge guides may match the number of the frame grooves.

In addition, a scroll compressor according to another embodiment of the present invention includes: a fixed scroll having a fixed wrap formed on one side; an orbiting scroll having a pivoting wrap engaged with the fixed wrap; a main frame formed in a cylindrical shape extending in one direction, a frame groove extending in the one direction is recessed on an outer circumferential surface, and coupled to the one side of the fixed scroll and the orbiting scroll with the orbiting scroll interposed therebetween; a stator formed in a cylindrical shape extending in the one direction, spaced apart from the lower end of the main frame by a predetermined distance, and having a stator groove extending in the one direction recessed on an outer circumferential surface; a casing extending in the one direction and accommodating the fixed scroll, the orbiting scroll, the main frame and the stator therein; and a discharge guide disposed between the frame groove portion and the stator groove portion and coupled to an inner circumferential surface of the casing, wherein the discharge guide extends in the one direction and is recessed toward the radially inner side of the casing, a discharge guide groove portion having an inner side overlapping the innermost portion of the frame groove portion in the one direction and spaced apart from the lower end of the main frame by a predetermined distance; and a discharge guide flange portion extending from the discharge guide groove portion in a direction different from the one direction and formed to be expanded, and disposed adjacent to an inner circumferential surface of the casing.

In addition, the flow cross-sectional area of the fluid passing between the lower end of the frame groove portion and the upper end of the discharge guide groove portion is a predetermined fifth value, and the flow cross-sectional area of the fluid passing between the inner circumferential surface of the casing and the inner surface of the discharge guide groove portion is a predetermined sixth value, and an area ratio of the fifth value to the sum of the fifth value and the sixth value may be a preset third area ratio.

In addition, the third area ratio may be 0.6 or more and 0.7 or less.

Also, the discharge guide may have a predetermined cross-section extending in the one direction.

In addition, the discharge guide groove, inner and outer edges of the upper end may be chamfered (tapered).

Also, a cross-sectional area of the discharge guide may be reduced in a direction toward the frame groove portion.

In addition, a plurality of the frame grooves and the discharge guide grooves may be provided, and the number of the discharge guides may match the number of the frame grooves.

Among the various effects of the present invention, the effects that can be obtained through the above-described solution are as follows.

First, a discharge guide is disposed between the main frame and the stator.

Specifically, the discharge guide is disposed between the frame groove portion of the main frame and the stator groove portion of the stator.

Accordingly, a portion of the refrigerant discharged from the compression unit may flow into the oil storage space by the discharge guide.

Accordingly, the temperature of the oil storage space may be further reduced.

In addition, the discharge guide is formed to extend in one direction. That is, the structure of the discharge guide is more simplified.

Accordingly, the area where the refrigerant passing through the discharge guide is stagnant can be further reduced. Accordingly, a phenomenon in which stress is concentrated in a specific portion of the discharge guide can be prevented.

Furthermore, the discharge guide can be prevented from falling off from the scroll compressor.

As a result, damage to the discharge guide and the scroll compressor can be prevented.

In addition, the refrigerant discharged from the compression unit is discharged to the discharge space and the oil storage space in a predetermined area ratio.

In this case, the predetermined area ratio may be adjusted according to a preset driving condition of the scroll compressor.

Accordingly, the refrigerant may be discharged to the discharge space and the oil storage space in an area ratio optimized for a preset driving condition of the scroll compressor.

In addition, since a portion of the refrigerant flows into the discharge space by the discharge guide, the flow rate of the refrigerant flowing into the discharge space is further increased.

Accordingly, the oil discharge amount of the scroll compressor can be further reduced.

Furthermore, the performance of the scroll compressor can be further improved.

1 is a cross-sectional view illustrating a scroll compressor according to an embodiment of the present invention.
FIG. 2 is an exploded perspective view showing the components of the compression unit of FIG. 1 from the upper side; FIG.
3 is an exploded perspective view showing the components of the compression unit of FIG. 1 from the lower side.
FIG. 4 is an enlarged cross-sectional view illustrating a portion of the scroll compressor of FIG. 1 .
Fig. 5 is a plan view showing the cylindrical shell, the fixed scroll and the ejection guide of Fig. 1;
FIG. 6 is a plan view showing a portion of the cylindrical shell of FIG. 1 , a portion of a stator, and a discharge guide;
7 is a perspective view illustrating a part of the stator of FIG. 1 , a part of the main frame, and a discharge guide;
8 is a perspective view illustrating a discharge guide according to an embodiment of the present invention.
9 is a perspective view illustrating a discharge guide according to another embodiment of the present invention.
FIG. 10 is a schematic diagram illustrating a flow path of a refrigerant passing through the discharge guide of FIG. 1 .

Hereinafter, the scroll compressor 10 according to an embodiment of the present invention will be described in more detail with reference to the drawings.

In the following description, in order to clarify the characteristics of the present invention, descriptions of some components may be omitted.

In the present specification, the same reference numerals are assigned to the same components even in different embodiments, and overlapping descriptions thereof will be omitted.

The accompanying drawings are only for easy understanding of the embodiments disclosed in the present specification, and the technical ideas disclosed in the present specification are not limited by the accompanying drawings.

Hereinafter, the scroll compressor 10 according to an embodiment of the present invention will be described with reference to FIGS. 1 to 3 .

The refrigeration cycle apparatus including the scroll compressor 10 according to the present invention is configured such that the scroll compressor 10, the condenser, the expander, and the evaporator form a closed loop.

A condenser, an expander, and an evaporator are sequentially connected to the refrigerant discharge pipe 116 of the scroll compressor 10 . Also, the discharge side of the evaporator is connected to the suction side of the scroll compressor 10 .

One side of the refrigerant suction pipe 115 is connected to the accumulator. In addition, the accumulator is connected to the outlet side of the evaporator by a refrigerant pipe.

Accordingly, the refrigerant moving from the evaporator to the accumulator is directly sucked into the compression chamber through the refrigerant suction pipe 115 after the liquid refrigerant is separated from the accumulator.

Accordingly, the refrigerant compressed in the scroll compressor 10 is discharged toward the condenser, and the refrigerant passes through the expander and the evaporator sequentially and is sucked back into the scroll compressor 10. A series of processes is repeated.

The scroll compressor 10 includes a casing 110 having a space therein for accommodating the driving motor 120 , the main frame 130 , the fixed scroll 140 , and the orbiting scroll 150 .

Specifically, the driving motor 120 is installed on the lower side of the casing 110 , and the main frame 130 , the orbiting scroll 150 , and the fixed scroll 140 are sequentially installed above the driving motor 120 . .

The drive motor 120 receives electrical energy from the outside and constitutes an electric part that converts it into mechanical energy.

In addition, the main frame 130 , the orbiting scroll 150 , and the fixed scroll 140 constitute a compression unit 1251 that receives mechanical energy generated from the driving motor 120 and compresses the refrigerant.

The electric part is coupled to the lower end of the rotating shaft 125 to be described later, and the compression unit 1251 is coupled to the upper end of the rotating shaft 125 . That is, the scroll compressor 10 has an upper compression type structure.

In summary, the scroll compressor 10 includes a driving unit and a compression unit 1251 , and the driving unit and the compression unit 1251 are accommodated in the inner space of the casing 110 .

The casing 110 may include a cylindrical shell 111 , an upper shell 112 , and a lower shell 113 .

The cylindrical shell 111 is formed in a cylindrical shape with both ends open. At this time, the cylindrical shell 111 extends in one direction.

An upper shell 112 is coupled to the upper end of the cylindrical shell 111 . In addition, the lower shell 113 is coupled to the lower end of the cylindrical shell 111 .

That is, both upper and lower ends of the cylindrical shell 111 are coupled to and covered with the upper shell 112 and the lower shell 113, respectively, and the combined cylindrical shell 111, the upper shell 112 and the lower shell 113. Silver forms the inner space of the casing (110). At this time, the inner space is sealed.

The inner space of the sealed casing 110 is divided into a first discharge space S1 , a second discharge space S2 , and an oil storage space S3 .

Based on the main frame 130 , the first discharge space S1 is formed on the upper side, and the second discharge space S2 and the oil storage space S3 are formed on the lower side.

The first discharge space S1 refers to an upper space of the compression unit 1251 . That is, the first discharge space S1 means an upper space of the fixed scroll 140 .

The second discharge space S2 refers to a space between the compression unit 1251 and the driving unit. That is, the second discharge space S2 means a space between the main frame 130 and the driving motor 120 .

The oil storage space S3 means a space below the driving motor 120 .

At this time, the refrigerant discharged from the compression unit 1251 to the first discharge space S1 is moved to the second discharge space S2 or the oil storage space S3 .

A refrigerant suction pipe 115 communicating with the inner space of the casing 110 is coupled through the upper portion of the casing 110 . Specifically, the refrigerant suction pipe 115 is coupled through the upper portion of the upper shell 112 .

The refrigerant flowing into the scroll compressor 10 through the refrigerant suction pipe 115 flows into a compression chamber formed between the fixed scroll 140 and the orbiting scroll 150 .

An accumulator may be coupled to one end of the refrigerant suction pipe 115 .

The accumulator is connected to the outlet side of the evaporator by a refrigerant pipe. Accordingly, after the refrigerant moving from the evaporator to the accumulator is separated from the liquid refrigerant in the accumulator, the gas refrigerant flows into the compression chamber through the refrigerant suction pipe 115 .

One end of the refrigerant discharge pipe 116 is coupled through the side of the casing 110 . Specifically, one end of the refrigerant discharge pipe 116 is through-coupled to the side surface of the cylindrical shell 111 in the radial direction of the cylindrical shell 111 .

At this time, the one end of the refrigerant discharge pipe 116 communicates with the second discharge space (S2).

The refrigerant discharged from the compression unit 1251 to the second discharge space S2 is discharged to the condenser through the refrigerant discharge pipe 116 .

A driving motor 120 is disposed on a lower portion of the inner space of the casing 110 .

The driving motor 120 includes a stator 121 and a rotor 122 .

The stator 121 is inserted into and fixed to the inner circumferential surface of the casing 110 . Specifically, the stator core 1211 of the stator 121 is fixed to the inner circumferential surface of the cylindrical shell 111 by hot pressing.

At this time, the stator 121 is spaced apart from the lower end of the main frame 130 by a predetermined distance.

The stator 121 includes a stator core 1211 and a stator coil 1212 .

The stator core 1211 is formed in a cylindrical shape extending in one direction, and is fixed to the inner circumferential surface of the cylindrical shell 111 by hot pressing. In this case, the one direction is the same as the extension direction of the cylindrical shell 111 .

A stator groove portion 1211a is recessed in the outer peripheral surface of the stator core 1211 .

In an embodiment, a plurality of stator grooves 1211a may be formed on an outer circumferential surface of the stator core 1211 .

The stator groove portion 1211a extends in the one direction. That is, the stator groove portion 1211a extends in the same direction as the extension direction of the stator core 1211 .

The stator groove portion 1211a is not limited to the illustrated shape, and may be formed in various shapes.

In an embodiment, the stator groove portion 1211a may be formed so that a semicircular cross-section extends in the one direction.

The stator coil 1212 is wound around the stator core 1211 , and is electrically connected to an external power source through a terminal (not shown) that is through-coupled to the casing 110 .

An insulator 1213 formed of an electrically insulating material is inserted between the stator core 1211 and the stator coil 1212 .

A rotor 122 is rotatably provided inside the stator core 1211 .

The rotor 122 includes a rotor 122 core and permanent magnets.

The rotor 122 core is formed in a cylindrical shape, and is accommodated in a space formed in the center of the stator core 1211 .

Specifically, the rotor 122 core is rotatably inserted into the space of the central portion of the stator core 1211 with an interval between the inner side of the stator core 1211 and a predetermined gap.

The permanent magnet is embedded in the core of the rotor 122 at a predetermined interval along the circumferential direction.

In one embodiment, a balance weight may be coupled to the lower end of the rotor 122 core. At this time, the balance weight may be coupled to the shaft portion 1251 of the rotation shaft 125 to be described later.

A rotation shaft 125 is coupled to the center of the rotor 122 .

The upper end of the rotation shaft 125 is rotatably inserted into the main frame 130 , and the lower end is press-fitted to the rotor 122 and coupled to support in the radial direction.

The rotating shaft 125 transmits the rotational force of the driving motor 120 to the orbiting scroll 150 constituting the compression unit 1251 . Accordingly, the orbiting scroll 150 eccentrically coupled to the rotation shaft 125 rotates with respect to the fixed scroll 140 .

The rotating shaft 125 includes a shaft portion 1251 , a first bearing portion 1252 , and a second bearing portion 1253 .

The shaft portion 1251 is an upper portion of the rotation shaft 125 and is formed in a cylindrical shape.

The shaft portion 1251 may be rotatably inserted into the main frame 130 .

In addition, the upper portion of the shaft portion 1251 may be formed eccentrically eccentric in the radial direction with respect to the first bearing portion 1252 and the second bearing portion 1253 . That is, the central axis of the first bearing part 1252 and the second bearing part 1253 and the central axis of the eccentric part may be formed to be inconsistent.

In this case, the eccentric part may be inserted into and coupled to the rotating shaft 125 coupling beam of the orbiting scroll 150 to be described later.

The first bearing part 1252 is a part extending from the lower end of the shaft part 1251 .

The first bearing part 1252 is located adjacent to the main bearing hole of the main frame 130 to be described later.

The second bearing part 1253 refers to a lower portion of the rotation shaft 125 .

The second bearing part 1253 may be press-fitted into the rotor 122 to be radially supported.

The central axis of the second bearing part 1253 and the central axis of the first bearing part 1252 may be arranged on the same line. That is, the first bearing part 1252 and the second bearing part 1253 may have the same central axis.

An oil supply passage for supplying oil is formed in the first bearing part 1252 and the second bearing part 1253 .

An oil feeder 127 for pumping oil filled in the oil storage space S3 is coupled to the lower end of the rotating shaft 125 , that is, the lower end of the second bearing part 1253 .

The oil feeder 127 is formed to extend in a direction opposite to the stator 121 on one side opposite to the stator 121 of the sub-frame 160 to be described later.

The oil feeder 127 includes an oil suction pipe 1271 and a blocking member 1272 .

The oil suction pipe 1271 is inserted into and coupled to the oil supply passage of the rotary shaft 125 . In addition, the oil suction pipe 1271 is coupled through the sub-frame 160 .

The oil suction pipe 1271 may extend downward so that the lower end thereof is submerged in the oil of the oil storage space S3.

The blocking member 1272 accommodates the oil suction pipe 1271 to block the intrusion of foreign substances.

The sub-frame 160 is coupled to the rotation shaft 125 and the oil feeder 127 to support the rotation shaft 125 and the oil feeder 127 in the radial direction.

In the illustrated embodiment, the sub-frame 160 is coupled to the second bearing part 1253 and the oil suction pipe 1271 to support the second bearing part 1253 and the oil suction pipe 1271 in the radial direction.

Hereinafter, the compression unit 1251 of FIG. 1 will be described in more detail with reference to FIGS. 2 and 3 .

As described above, the compression unit 1251 includes the main frame 130 , the fixed scroll 140 , and the orbiting scroll 150 .

First, the main frame 130 will be described.

The main frame 130 includes a frame end plate part 131 and a frame side wall part 132 .

The main frame 130 is coupled with one side of the fixed scroll 140 and the orbiting scroll 150 interposed therebetween. Specifically, the frame sidewall 132 is coupled to one side of the fixed end plate 141 of the fixed scroll 140 .

The frame end plate 131 is formed in an annular shape.

On the lower surface of the central part of the frame head plate part 131 , a main bearing part is formed to protrude downward toward the driving motor 120 .

At this time, a cylindrical main bearing hole is formed in the main bearing portion to penetrate in the axial direction.

In one embodiment, the main bearing is inserted and fixed to the inner circumferential surface of the main bearing hole, and the rotating shaft 125 is inserted into the main bearing and supported in the radial direction.

The frame side wall part 132 is formed to extend upwardly from the upper side edge of the frame head plate part 131 in a cylindrical shape. Accordingly, the main frame 130 is formed in a cylindrical shape extending in one direction.

The outer peripheral surface of the frame side wall portion 132 is fixed to the inner peripheral surface of the cylindrical shell 111 by hot pressing or by welding.

Accordingly, the space under the frame end plate 131 may be separated. That is, the second discharge space S2 may be formed under the frame end plate 131 .

A frame groove portion 132a is formed through the frame sidewall portion 132 in the vertical direction. Specifically, the frame groove portion 132a extends in one direction and is recessed on the outer circumferential surface of the frame side wall portion 132 .

In an embodiment, the one direction of the frame groove portion 132a may be the same as the extension direction of the main frame 130 .

In another embodiment, a plurality of frame grooves 132a may be formed on an outer circumferential surface of the frame sidewall portion 132 .

The frame groove 132a forms a discharge flow path of the refrigerant discharged from the first discharge space S1 to the second discharge space S2.

A discharge guide 134 for guiding the flow of the refrigerant passing through the frame groove portion 132a is disposed below the frame groove portion 132a. A detailed description thereof will be given later (see FIGS. 4 to 9 ).

In addition, a scroll receiving part is formed in a space surrounded by the inner peripheral surface of the frame side wall part 132 and the upper surface of the frame head plate part 131 .

A orbiting scroll 150 to be described later is pivotally accommodated in the scroll accommodating part. To this end, the inner diameter of the frame side wall portion 132 should be larger than the outer diameter of the turning head plate portion 151 to be described later.

In addition, the height (depth) of the frame side wall portion 132 constituting the scroll receiving portion may be greater than or equal to the thickness of the orbiting head plate portion 151 . Accordingly, in a state in which the frame sidewall part 132 is supported on the lower surface of the fixed scroll 140 , the orbiting scroll 150 may pivot in the scroll receiving part.

The scroll support part is formed in an annular shape on the upper surface of the frame head plate part 131 facing the turning head plate part 151 of the orbiting scroll 150 to be described later.

Accordingly, the Oldham ring 180 may be pivotally inserted between the outer circumferential surface of the scroll support and the inner circumferential surface of the frame sidewall 132 .

Hereinafter, the fixed scroll 140 will be described.

The fixed scroll 140 includes a fixed end plate 141 , a fixed sidewall portion 142 , and a fixed wrap 144 .

The fixed end plate part 141 is formed in a disk shape in which a plurality of concave portions are formed on an outer circumferential surface.

A sub-bearing part is formed to extend from the center of the fixed head plate part 141 toward the first discharge space S1 in the axial direction.

Accordingly, the upper end of the rotating shaft 125 is inserted into the sub bearing unit and supported in the radial direction, and the eccentric portion of the rotating shaft 125 may be axially supported on the lower surface of the fixed head plate 141 forming the periphery of the sub bearing unit. .

The fixed side wall part 142 may be formed in an annular shape by extending downwardly from the edge of the lower surface of the fixed end plate part 141 .

The fixed side wall part 142 may be coupled to face the frame side wall part 132 of the main frame 130 in the vertical direction.

A scroll discharge hole may be formed through the fixed sidewall portion 142 in the vertical direction.

In an embodiment, a plurality of scroll discharge holes may be formed through the outer circumferential surface of the fixed sidewall part 142 . In this case, the number of scroll discharge holes may be the same as the number of frame grooves 132a.

The fixed wrap 144 is formed to extend from the upper surface of the fixed end plate 141 toward the orbiting scroll 150 in the axial direction.

The fixed wrap 144 is formed on one side of the fixed scroll 140 .

The fixed wrap 144 is engaged with a pivot wrap 152 to be described later to form a compression chamber. That is, one side of the fixed scroll 140 and the orbiting scroll 150 are combined to form a compression chamber. A detailed description thereof will be described later along with the description of the turning wrap 152 .

Hereinafter, the orbiting scroll 150 will be described.

The orbiting scroll 150 includes a turning end plate part 151 , a turning wrap 152 and a rotation shaft coupling part 153 .

The turning head plate part 151 is formed in a disk shape.

The orbiting wrap 152 is formed to extend toward the fixed scroll 140 from the upper surface of the orbiting head plate part 151 .

As noted above, the pivot wrap 152 engages the stationary wrap 144 to form a compression chamber.

Specifically, the compression chamber is a first compression chamber formed between the inner surface of the fixed wrap 144 and the outer surface of the turning wrap 152 with respect to the fixed wrap 144 and the outer surface of the fixed wrap 144 and the turning wrap and a second compression chamber formed between the inner surfaces of (152).

In the illustrated embodiment, the turning wrap 152 is formed in an involute shape together with the fixed wrap 144 , and the inner end of the turning wrap 152 is formed in the center of the turning end plate 151 .

However, the turning wrap 152 and the fixed wrap 144 are not limited to the illustrated shapes, and may be formed in various shapes other than the involute.

In addition, a rotation shaft coupling part 153 is formed to penetrate in the axial direction in the central portion of the turning head plate part 151 .

The eccentric portion of the rotating shaft 125 is rotatably inserted and coupled to the rotating shaft coupling portion 153 . At this time, the outer periphery of the rotating shaft coupling portion 153 is connected to the orbital wrap 152 to form a compression chamber together with the fixed wrap 144 in the compression process.

In one embodiment, the rotation shaft coupling part 153 may be formed to have a height overlapping with the orbiting wrap 152 on the same plane. That is, the rotation shaft coupling portion 153 may be disposed at a height at which the eccentric portion of the rotation shaft 125 overlaps on the same plane as the rotation wrap 152 .

Accordingly, the repulsive force and the compressive force of the refrigerant may be offset from each other while being applied to the same plane based on the turning head plate part 151 .

Accordingly, the inclination of the orbiting scroll 150 due to the action of the compressive force and the repulsive force can be suppressed.

An oil accommodating part is formed inside the rotating shaft coupling part 153 to form a flow path of oil supplied to the compression chamber from the oil storage space S3.

Hereinafter, the discharge guide 134 of FIG. 1 will be described in more detail with reference to FIGS. 4 to 9 .

As described above, the discharge guide 134 guides the flow of the refrigerant discharged from the frame groove portion 132a.

In the illustrated embodiment, one scroll compressor 10 is provided with a single discharge guide 134 . However, the number of the discharge guides 134 is not limited to the illustrated number.

In an embodiment, a plurality of discharge guides 134 may be provided in one scroll compressor 10 . In this case, the number of discharge guides 134 is the same as the number of frame grooves 132a.

The discharge guide 134 is disposed between the main frame 130 and the driving motor 120 . Specifically, the discharge guide 134 is disposed between the frame groove portion 132a and the stator groove portion 1211a.

In addition, the discharge guide 134 is spaced apart from the lower end of the main frame 130 by a predetermined distance.

The discharge guide 134 is coupled to the inner circumferential surface of the casing 110 . Specifically, the discharge guide flange portion 1342 of the discharge guide 134 is coupled to the inner circumferential surface of the cylindrical shell 111 .

The discharge guide 134 is formed to extend in one direction. In this case, the one direction is the same as the extending direction of the frame groove portion 132a.

In an embodiment, the discharge guide 134 has a predetermined cross section extending in the one direction (see FIGS. 7 and 8 ).

The discharge guide 134 includes a discharge guide groove portion 1341 and a discharge guide flange portion 1342 .

The discharge guide groove 1341 forms a part of the flow path of the refrigerant flowing from the first discharge space S1 to the oil storage space S3. Specifically, the discharge guide groove portion 1341 forms a space through which the refrigerant passes.

The discharge guide groove portion 1341 is recessed toward the radially inner side of the casing 110 .

Accordingly, a portion of the refrigerant discharged from the first discharge space S1 passes between the outer surface of the discharge guide groove portion 1341 and the inner surface of the frame groove portion 132a and flows into the second discharge space S2. .

Accordingly, the amount of refrigerant flowing into the second discharge space S2 may be further increased.

In addition, the total oil discharge amount of the scroll compressor 10 may be further reduced.

Furthermore, the OCR (Discharge Oil Circulation Ratio) and performance of the scroll compressor 10 may be further improved.

In addition, the remaining part of the refrigerant discharged from the first discharge space S1 to the frame groove portion 132a flows into the stator groove portion 1211a along the discharge guide groove portion 1341 and is then discharged into the oil storage space S3. .

That is, the remaining part of the refrigerant discharged from the first discharge space S1 is guided by the discharge guide groove 1341 to flow into the oil storage space S3 .

Specifically, the remaining part of the refrigerant discharged from the first discharge space S1 passes through the space between the inner surface of the discharge guide groove portion 1341 and the inner circumferential surface of the casing 110 and then flows into the oil storage space S3. .

Accordingly, the temperature of the oil storage space S3 into which the refrigerant is introduced may be further reduced.

In summary, a portion of the refrigerant discharged from the first discharge space S1 flows into the second discharge space S2 , and the remaining portion flows into the oil storage space S3 .

In this case, if the refrigerant flowing into the second discharge space S2 is excessively increased, the cooling efficiency of the stator 121 may decrease. When the stator 121 is not sufficiently cooled, the efficiency of the driving motor 120 may also decrease. Furthermore, the efficiency of the scroll compressor 10 may also be reduced.

Conversely, if the refrigerant flowing into the oil storage space S3 is excessively increased, there is a possibility that the oil separation of the oil may not be performed sufficiently. Accordingly, an oil discharge amount of the scroll compressor 10 may be increased.

In addition, when the refrigerant flowing into the oil storage space S3 is excessively increased, there is a possibility that the pressure of the oil storage space S3 disposed below the oil storage space S3 is excessively increased. This may result in a decrease in the efficiency of the scroll compressor 10 .

Therefore, it is important that the amount of the refrigerant flowing into the second discharge space S2 and the refrigerant flowing into the oil storage space S3 is appropriately adjusted without being eccentric to either side.

The refrigerant discharged from the frame groove portion 132a is discharged to the second discharge space S2 and the oil storage space S3 in a predetermined area ratio, and the area ratio can be adjusted according to a predetermined driving condition of the scroll compressor 10 . have.

Accordingly, the refrigerant discharged from the frame groove portion 132a may be introduced into the second discharge space S2 and the oil storage space S3 with an area ratio optimized for a preset driving condition of the scroll compressor 10 .

The inventor tested the efficiency of the scroll compressor 10 under conditions in which the area ratio of the flow cross-sectional area of the refrigerant flowing into the second discharge space S2 and the flow cross-sectional area of the refrigerant flowing into the storage oil space S3 was set to be various. When the area ratio was 0.64:0.36, the EER (Energy Efficiency Ratio) of the scroll compressor 10 was formed the highest.

In addition, when the area ratio is 0.64:0.36, the OCR of the scroll compressor 10 is formed to be the lowest. That is, when the area ratio is 0.64:0.36, oil separation in the scroll compressor 10 may be sufficiently performed.

In addition, when the area ratio was 0.64:0.36, the temperature difference between the lower part and the upper part of the stator 121 was formed to be the smallest. That is, when the area ratio is 0.64:0.36, the efficiency of the driving motor 120 may be further increased.

Therefore, it is preferable that the area ratio is formed to be 0.64:0.36.

The area ratio of the flow cross-sectional area of the refrigerant flowing into the second discharge space S2 and the flow cross-sectional area of the refrigerant flowing into the oil storage space S3 is the distance between the innermost side of the discharge guide groove 1341 and the casing 110 and the discharge It can be adjusted by the distance between the upper end of the guide 134 and the lower end of the frame groove (132a).

The distance between the innermost side of the discharge guide groove portion 1341 and the casing 110 is formed to be equal to or smaller than the distance between the innermost side of the frame groove portion 132a and the casing 110 .

In an embodiment, the distance between the innermost side of the discharge guide groove portion 1341 and the casing 110 is formed to be smaller than the distance between the innermost side of the frame groove portion 132a and the casing 110 .

At this time, the flow cross-sectional area of the fluid passing between the outer surface of the discharge guide groove portion 1341 and the inner surface of the frame groove portion 132a is a predetermined first value. In addition, the flow cross-sectional area of the fluid passing between the inner surface of the discharge guide groove part 1341, the inner surface of the frame groove part 132a, and the inner peripheral surface of the casing 110 is a predetermined second value.

An area ratio of the first value to the sum of the first value and the second value is a predetermined first area ratio.

The first area ratio is 0.6 or more and 0.7 or less. Preferably, the first area ratio is 0.64.

In another embodiment, the distance between the innermost side of the discharge guide groove portion 1341 and the casing 110 is formed smaller than the distance between the innermost side of the frame groove portion 132a and the casing 110 , and the upper end of the discharge guide 134 . is spaced apart from the lower end of the frame groove portion 132a.

At this time, the flow cross-sectional area of the fluid passing between the outer surface of the upper end of the discharge guide groove portion 1341 and the inner surface of the lower end of the frame groove portion 132a is a predetermined third value. In addition, the flow cross-sectional area of the fluid passing between the inner surface of the discharge guide groove part 1341, the inner peripheral surface of the casing 110, and the inner surface of the frame groove part 132a is a predetermined fourth value.

An area ratio of the third value to the sum of the third value and the fourth value is a preset second area ratio.

The second area ratio is 0.6 or more and 0.7 or less. Preferably, it is 0.64.

In another embodiment, the distance between the innermost side of the discharge guide groove portion 1341 and the casing 110 is the same as the distance between the innermost side of the frame groove portion 132a and the casing 110 . That is, the innermost side of the discharge guide groove portion 1341 overlaps the innermost side of the frame groove portion 132a in the extending direction of the frame groove portion 132a. In other words, the innermost side of the discharge guide groove portion 1341 and the innermost side of the frame groove portion 132a are arranged in a straight line with the frame groove portion 132a.

At this time, the flow cross-sectional area of the fluid passing between the upper end of the discharge guide groove portion 1341 and the lower end of the frame groove portion 132a is a predetermined fifth value. In addition, the flow cross-sectional area of the fluid passing between the inner surface of the discharge guide groove portion 1341 and the inner peripheral surface of the casing 110 is the sixth value.

The area ratio of the fifth value to the sum of the fifth value and the sixth value is a preset third area ratio.

The third area ratio is 0.6 or more and 0.7 or less. Preferably, it is 0.64.

The discharge guide groove portion 1341 extends in one direction. In this case, the one direction is the same as the extending direction of the frame groove portion 132a.

Accordingly, the refrigerant passing through the discharge guide 134 does not flow in a direction different from the extending direction of the frame groove 132a, but flows in a predetermined direction. Accordingly, the flow path of the refrigerant passing through the discharge guide 134 may be more simplified.

In addition, the force applied by the refrigerant passing through the discharge guide 134 to the discharge guide 134 in a direction different from the one direction may be further reduced. That is, the region in which the refrigerant is stagnated during flow can be further reduced.

Furthermore, a phenomenon in which stress is concentrated in a specific portion of the discharge guide 134 may be prevented.

As a result, a phenomenon in which the discharge guide 134 is detached from the scroll compressor 10 and damage to the scroll compressor 10 can be prevented.

In the illustrated embodiment, the discharge guide groove portion 1341 is formed with a predetermined cross-section extending in the one direction. That is, the thickness of the discharge guide groove portion 1341 is uniformly formed.

However, the discharge guide groove portion 1341 is not limited to the illustrated shape, and may be formed in various shapes.

In an embodiment, inner and outer corners of the upper end of the discharge guide groove portion 1341 may be tapered.

Accordingly, a flow loss that may occur when the refrigerant collides with the upper end of the discharge guide groove portion 1341 may be minimized.

In another embodiment, the cross-sectional area of the discharge guide groove portion 1341 may be reduced in a direction toward the frame groove portion 132a. That is, the thickness of the discharge guide groove portion 1341 may be gradually reduced in a direction toward the frame groove portion 132a.

In the above embodiment, flow loss that may occur when the refrigerant collides with the upper end of the discharge guide groove portion 1341 may be minimized.

The discharge guide flange portion 1342 is a portion in which the discharge guide 134 is directly coupled to the inner circumferential surface of the casing 110 , and helps the coupling between the casing 110 and the discharge guide 134 .

The discharge guide flange portion 1342 is disposed adjacent to the inner circumferential surface of the casing 110 .

The discharge guide flange portion 1342 is coupled to the inner circumferential surface of the casing 110 by a coupling member such as a bolt.

The discharge guide flange portion 1342 extends from the discharge guide groove portion 1341 in a direction different from the one direction and is formed to be expanded.

The discharge guide flange portion 1342 is not limited to the illustrated shape, and may be formed in various shapes. For example, the discharge guide flange portion 1342 may be formed in a semi-circular plate shape.

The discharge guide 134 may additionally include a discharge guide extension in addition to the discharge guide groove 1341 and the discharge guide flange 1342 (see FIG. 9 ).

The discharge guide extension is formed to protrude from the upper end of the discharge guide groove 1341 toward the frame groove 132a.

Accordingly, the discharge guide extension is accommodated in the space between the frame groove portion 132a and the inner circumferential surface of the casing 110 .

Accordingly, the coupling force between the discharge guide 134 and the frame groove portion 132a may be further strengthened.

Furthermore, the drop-off phenomenon of the discharge guide 134 may be prevented.

In the illustrated embodiment, the discharge guide extension portion is formed by extending a predetermined cross-section in one direction. In this case, the one direction is the same as the extending direction of the discharge guide groove portion 1341 .

However, the discharge guide extension is not limited to the illustrated shape, and may be formed in various shapes.

In an embodiment, inner and outer corners of the upper end of the discharge guide extension may be chamfered.

Accordingly, flow loss that may occur when the refrigerant collides with the upper end of the discharge guide extension can be minimized.

In another embodiment, the discharging guide extension portion may have a reduced cross-sectional area in a direction toward the frame groove portion 132a. That is, the thickness of the discharge guide extension portion may be gradually reduced in the direction toward the frame groove portion 132a.

In the above embodiment, flow loss that may occur when the refrigerant collides with the upper end of the discharge guide extension can be minimized.

Hereinafter, a movement path of the refrigerant when the scroll compressor 10 is operated will be described in more detail with reference to FIGS. 7 to 10 .

The arrows in the drawing show the movement path of the refrigerant (refer to FIGS. 7 and 10).

First, when the scroll compressor 10 is started, a refrigerant is introduced through the refrigerant suction pipe 115 . Specifically, the refrigerant is sucked into the compression chamber through the refrigerant suction pipe 115 .

The refrigerant flowing into the compression chamber is compressed by the orbiting motion of the orbiting scroll 150 and discharged to the first discharge space S1 .

The refrigerant in the first discharge space S1 sequentially passes through the fixed scroll 140 and the main frame 130 , and then collides with the discharge guide 134 .

Specifically, the refrigerant in the first discharge space S1 sequentially passes through the scroll discharge hole of the fixed scroll 140 and the frame groove portion 132a of the main frame 130 , and then collides with the discharge guide 134 .

At this time, the refrigerant collides with the upper end of the discharge guide groove portion 1341 or the upper end of the discharge guide extension.

A portion of the refrigerant discharged from the frame groove portion 132a flows into the second discharge space S2.

Specifically, the refrigerant introduced between the outer surface of the discharge guide groove portion 1341 and the inner surface of the frame groove portion 132a among the refrigerants discharged from the frame groove portion 132a flows into the second discharge space S2 .

The refrigerant flowing into the second discharge space S2 is discharged to the outside of the scroll compressor 10 through the refrigerant discharge pipe 116 .

Conversely, the remaining portion of the refrigerant discharged from the frame groove portion 132a passes through the stator 121 and flows into the oil storage space S3.

Specifically, the remaining portion of the refrigerant discharged from the frame groove portion 132a passes through the stator groove portion 1211a of the stator 121 and flows into the oil storage space S3.

More specifically, the refrigerant introduced between the inner surface of the discharge guide groove portion 1341 and the inner peripheral surface of the casing 110 among the refrigerants discharged from the frame groove portion 132a passes through the stator groove portion 1211a to the storage space (S3). is introduced into

In summary, the refrigerant introduced into the inner space of the casing 110 through the refrigerant suction pipe 115 is the compression chamber, the first discharge space S1 , the scroll discharge hole of the fixed scroll 140 , and the frame of the main frame 130 . After sequentially passing through the groove portion 132a, a portion is introduced into the second discharge space S2 and is discharged to the outside of the scroll compressor 10 through the refrigerant discharge pipe 116, and the remaining portion is the stator groove portion 1211a. is introduced into the oil storage space (S3).

Accordingly, it is preferable that the frame groove portion 132a, the discharge guide 134, and the stator groove portion 1211a have the same number.

In this case, when the amounts of the refrigerant flowing into the second discharge space S2 and the refrigerant flowing into the oil storage space S3 are properly adjusted without being eccentric to either side, the efficiency of the scroll compressor 10 can be maximized. .

The refrigerant discharged from the frame groove portion 132a is the distance between the innermost side of the discharge guide groove portion 1341 and the casing 110 and the distance between the upper end of the discharge guide 134 and the lower end of the frame groove portion 132a is adjusted. Accordingly, an amount flowing into the second discharge space S2 and an amount flowing into the oil storage space S3 may be adjusted.

The refrigerant discharged from the frame groove 132a has an area ratio of a flow cross-sectional area flowing into the second discharge space S2 to a flow cross-sectional area flowing into the oil storage space S3 is optimized to a preset driving condition of the scroll compressor 10 . In this state, it may flow into the second discharge space S2 and the oil storage space S3 .

Specifically, an area ratio between the cross-sectional area of flow flowing into the second discharge space S2 and the cross-sectional area of flow flowing into the storage space S3 may be 0.6:0.4 to 0.7:0.3. Preferably, the area ratio is 0.64:0.36.

While the refrigerant flows through the above path, oil flows into the oil storage space S3, sequentially passes through the compression chamber and the first discharge space S1, and then is recovered and circulated back to the storage oil space S3.

First, oil is supplied from the oil storage space S3 through the oil feeder 127 to the compression chamber.

The oil supplied to the compression chamber moves to the first discharge space S1 together with the refrigerant, and then collides with the upper shell 112 , and the space between the fixed scroll 140 and the casing 110 and the main frame 130 . ) and the casing 110 is descended while passing through the space sequentially.

The oil discharged to the lower portion of the main frame 130 passes through the space between the stator 121 and the casing 110 and is finally discharged to the oil storage space S3 .

In this case, in the scroll compressor 10 according to the present invention, a portion of the refrigerant collected in the first discharge space S1 is introduced into the oil storage space S3 by the discharge guide 134 .

Accordingly, the temperature of the oil storage space S3 may be further reduced.

Although the above has been described with reference to the preferred embodiments of the present invention, the present invention is not limited to the configuration of the above-described embodiments.

In addition, the present invention can be variously modified and changed by those of ordinary skill in the art to which the present invention pertains without departing from the spirit and scope of the present invention as set forth in the claims below.

Furthermore, the embodiments may be configured by selectively combining all or part of each embodiment so that various modifications can be made.

10: scroll compressor
110: casing
111: cylindrical shell
112: upper shell
113: lower shell
115: refrigerant suction pipe
116: refrigerant discharge pipe
120: drive motor
121: stator
1211: stator core
1211a: stator groove
1212: stator coil
1213: insulator
122: rotor
125: axis of rotation
1251: shaft
1252: first bearing part
1253: second bearing part
127: oil feeder
1271: oil suction pipe
1272: blocking member
130: main frame
131: frame end plate
132: frame side wall portion
132a: frame groove
134: ejection guide
1341: discharge guide groove portion
1342: discharge guide flange portion
1343: discharge guide extension
140: fixed scroll
141: fixed end plate
142: fixed side wall portion
144: fixed wrap
150: orbiting scroll
151: turning head plate
152: slewing lap
153: rotation shaft coupling part
160: sub frame
180: oldham ring
S1: first discharge space
S2: second discharge space
S3: storage space

Claims (18)

fixed scroll;
an orbiting scroll coupled to one side of the fixed scroll to form a compression chamber;
a main frame formed in a cylindrical shape extending in one direction, a frame groove extending in the one direction is recessed on an outer circumferential surface, and coupled to the one side of the fixed scroll and the orbiting scroll with the orbiting scroll interposed therebetween;
a stator formed in a cylindrical shape extending in the one direction, spaced apart from the lower end of the main frame by a predetermined distance, and having a stator groove extending in the one direction recessed on an outer circumferential surface;
a casing extending in the one direction and accommodating the fixed scroll, the orbiting scroll, the main frame and the stator therein;
a refrigerant discharge pipe passing through the casing and communicating with the inner space of the casing; and
and a discharge guide disposed between the frame groove portion and the stator groove portion and coupled to the inner circumferential surface of the casing,
The discharge guide is
a discharge guide groove extending in the one direction and recessed toward the radially inner side of the casing, the distance between the innermost side and the casing being smaller than the distance between the innermost side of the frame groove portion and the casing; and
and a discharge guide flange portion extending along a direction different from the one direction from the discharge guide groove portion and extending and disposed adjacent to the inner circumferential surface of the casing,
The discharge guide is
Comprising a discharge guide extension formed to protrude from the upper end of the discharge guide groove toward the frame groove,
scroll compressor. fixed scroll;
an orbiting scroll coupled to one side of the fixed scroll to form a compression chamber;
a main frame formed in a cylindrical shape extending in one direction, a frame groove extending in the one direction is recessed on an outer circumferential surface, and coupled to the one side of the fixed scroll and the orbiting scroll with the orbiting scroll interposed therebetween;
a stator formed in a cylindrical shape extending in the one direction, spaced apart from the lower end of the main frame by a predetermined distance, and having a stator groove extending in the one direction recessed on an outer circumferential surface;
a casing extending in the one direction and accommodating the fixed scroll, the orbiting scroll, the main frame and the stator therein;
a refrigerant discharge pipe passing through the casing and communicating with the inner space of the casing; and
and a discharge guide disposed between the frame groove portion and the stator groove portion and coupled to the inner circumferential surface of the casing,
The discharge guide is
a discharge guide groove extending in the one direction and recessed toward the radially inner side of the casing, the distance between the innermost side and the casing being smaller than the distance between the innermost side of the frame groove portion and the casing; and
and a discharge guide flange portion extending along a direction different from the one direction from the discharge guide groove portion and extending and disposed adjacent to the inner circumferential surface of the casing,
The discharge guide is
It is spaced apart from the frame groove portion of the main frame by a predetermined distance in one direction and is provided at a height overlapping the end of the refrigerant discharge pipe in a radial direction, the discharge guide groove is blocked in both circumferential directions and faces the frame groove One end and the other end facing the stator groove are opened to communicate with each other,
scroll compressor. 3. The method of claim 1 or 2,
The flow cross-sectional area of the fluid passing between the inner surface of the frame groove and the outer surface of the discharge guide groove is a predetermined first value,
The flow cross-sectional area of the fluid passing between the inner peripheral surface of the casing, the inner surface of the frame groove part, and the inner surface of the discharge guide groove part is a predetermined second value,
An area ratio of the first value to the sum of the first value and the second value is a predetermined first area ratio;
scroll compressor. 4. The method of claim 3,
The first area ratio is 0.6 or more and 0.7 or less,
scroll compressor. 3. The method of claim 1 or 2,
The discharge guide is
Spaced apart by a predetermined distance from the lower end of the main frame,
scroll compressor. 6. The method of claim 5,
The flow cross-sectional area of the fluid passing between the inner surface of the lower end of the frame groove and the outer surface of the upper end of the discharge guide groove is a predetermined third value,
The flow cross-sectional area of the fluid passing between the inner peripheral surface of the casing, the inner surface of the frame groove part, and the inner surface of the discharge guide groove part is a predetermined fourth value,
An area ratio of the third value to the sum of the third value and the fourth value is a preset second area ratio;
scroll compressor. 7. The method of claim 6,
The second area ratio is 0.6 or more and 0.7 or less,
scroll compressor. 3. The method of claim 2,
The discharge guide is
Comprising a discharge guide extension formed to protrude from the upper end of the discharge guide groove toward the frame groove,
scroll compressor. 3. The method of claim 1 or 2,
The discharge guide groove portion,
The inner and outer edges of the upper part are chamfered,
scroll compressor. 10. The method of claim 9,
The discharge guide is
The cross-sectional area is reduced in the direction toward the frame groove portion,
scroll compressor. 3. The method of claim 1 or 2,
A plurality of the frame groove portion and the discharge guide are provided,
The number of the discharge guide coincides with the number of the frame groove portion,
scroll compressor. Fixed scroll having a fixed wrap formed on one side;
an orbiting scroll having a pivoting wrap engaged with the fixed wrap;
a main frame formed in a cylindrical shape extending in one direction, a frame groove extending in the one direction is recessed on an outer circumferential surface, and coupled to the one side of the fixed scroll and the orbiting scroll with the orbiting scroll interposed therebetween;
a stator formed in a cylindrical shape extending in the one direction, spaced apart from the lower end of the main frame by a predetermined distance, and having a stator groove extending in the one direction recessed on an outer circumferential surface;
a casing extending in the one direction and accommodating the fixed scroll, the orbiting scroll, the main frame and the stator therein; and
and a discharge guide disposed between the frame groove portion and the stator groove portion and coupled to the inner circumferential surface of the casing,
The discharge guide is
a discharge guide groove portion extending in the one direction, recessed toward the radial inside of the casing, an innermost side overlapping the innermost side of the frame groove portion in the one direction, and spaced apart from the lower end of the main frame by a predetermined distance; and
and a discharge guide flange portion extending along a direction different from the one direction from the discharge guide groove portion and extending and disposed adjacent to the inner circumferential surface of the casing,
The discharge guide is
The cross-sectional area is reduced in the direction toward the frame groove portion,
scroll compressor. 13. The method of claim 12,
The flow cross-sectional area of the fluid passing between the lower end of the frame groove and the upper end of the discharge guide groove is a predetermined fifth value,
The flow cross-sectional area of the fluid passing between the inner peripheral surface of the casing and the inner surface of the discharge guide groove is a predetermined sixth value,
An area ratio of the fifth value to the sum of the fifth value and the sixth value is a preset third area ratio;
scroll compressor. 14. The method of claim 13,
The third area ratio is 0.6 or more and 0.7 or less,
scroll compressor. 13. The method of claim 12,
The discharge guide is
A predetermined cross section extends in the one direction,
scroll compressor. 13. The method of claim 12,
The discharge guide groove portion,
The inner and outer edges of the upper part are chamfered,
scroll compressor. delete 13. The method of claim 12,
A plurality of the frame groove portion and the discharge guide are provided,
The number of the discharge guide coincides with the number of the frame groove portion,
scroll compressor.

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