KR20210080888A - Scoroll comppresor - Google Patents

Abstract

The present invention discloses a compressor, comprising a guide pipe part and a decompression unit, wherein the decompression unit includes: a fixed guide part having a first protrusion helically protruding inside the guide pipe part forming a pipeline for guiding oil inside a rear housing to the inside of a fixed scroll; and an insert part having a second protrusion engaged with the first protrusion, coupled to the fixed guide part, and forming a pressure-reducing passage through which a refrigerant moves between the first protrusion and the second protrusion. An object of the present invention is to provide a scroll compressor capable of reducing material cost and parts management cost.

Description

Scroll Compressor {SCOROLL COMPPRESOR}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compressor, and more particularly to a scroll compressor.

A compressor is a device for compressing a fluid, such as a refrigerant gas, and may be classified into a rotary compressor, a reciprocating compressor, a scroll compressor, etc. according to a method of compressing the fluid.

In a scroll compressor, a plurality of compression chambers are formed between the two scrolls as the two scrolls perform relative rotational motion, and as the volume decreases while the compression chambers continuously move in the central direction, refrigerant is continuously sucked, compressed, and discharged. Compressor applied.

Scroll compressors are widely used for refrigerant compression in air conditioners, etc. because of their advantages in that a relatively high compression ratio can be obtained compared to other types of compressors, and a stable torque can be obtained through smooth suction, compression, and discharge strokes of the refrigerant.

The scroll compressor may include a motor and a compression unit. The motor includes a drive motor comprising a rotor and a stator, and a drive shaft that rotates together as the drive motor rotates and an eccentric portion is formed thereon. A main frame may be disposed between the motor and the compression unit.

The compression unit may include an orbiting scroll and a fixed scroll. The fixed scroll is fixed to the upper part of the main frame, and the orbiting scroll is disposed between the main frame and the fixed scroll. The orbiting scroll may be connected to the driving shaft and rotate by rotation of the driving shaft, and may compress the refrigerant sucked into the compression unit while rotating in engagement with the fixed scroll.

Such a scroll compressor may be classified into a high-pressure type and a low-pressure type according to a refrigerant suction method. The high pressure type is a method of directly sucking the refrigerant into the compression chamber, and the low pressure type is a method of indirectly sucking the refrigerant into the compression chamber.

In the high-pressure compressor, the refrigerant compressed in the compression chamber is discharged to the inner space of the housing provided in the motor. The refrigerant and oil are separated while passing through the inner space of the housing. The oil remains in the inner space of the housing, while the refrigerant is discharged to the outside of the compressor through the discharge port. In such a high-pressure compressor, the inner space of the housing forms a kind of oil separation space, thereby preventing oil from mixing with the refrigerant and flowing out.

In contrast, in the low-pressure compressor, the refrigerant is sucked into the compression chamber through the inner space of the housing provided in the motor, and the refrigerant compressed in the compression chamber is directly discharged to the outside of the compressor through the discharge space. Accordingly, there is a risk that the oil mixed with the refrigerant is not sufficiently separated and the refrigerant and the oil are discharged together to the outside of the compressor. Accordingly, a centrifugal oil separator is usually installed at the outlet of the low-pressure compressor. In some cases, such a centrifugal oil separator may be applied even in a high pressure type.

As it passes through the oil separator, the oil passes through the decompression unit and moves to the inside of the housing to form the functions of oil supply and back pressure.

In order to reduce the pressure of high-pressure oil, a pressure reducing pin and a blocking member for preventing separation of the pressure reducing pin are installed inside the connecting pipe connecting the oil separator and the inner space of the housing. The oil that passes through the oil separator and is separated from the refrigerant passes through the pressure reducing pin provided inside the connecting pipe and moves to the inside of the housing after the pressure is reduced.

Conventionally, in order to reduce the pressure of the oil recovered from the oil separator, since the pressure reducing pin and the blocking member are each made of separate members, there is a problem in that material cost and parts management cost increase.

In addition, since a device for filtering foreign substances contained in the recovered oil is not separately provided, there is a problem in that operation reliability is lowered.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a scroll compressor capable of reducing material costs and parts management costs by reducing the number of parts for reducing the pressure of oil recovered from an oil separator.

Another object of the present invention is to provide a scroll compressor in which operation reliability is improved by removing foreign substances contained in oil recovered from an oil separator.

In order to achieve the above object, a scroll compressor according to an embodiment of the present invention includes an orbiting scroll connected to a drive shaft of a motor for supplying rotational power, a fixed scroll that engages with the orbiting scroll to form a compression chamber, and a position facing the fixed scroll It is installed in the rear housing for discharging the discharged refrigerant discharged through the fixed scroll to the outside, and the guide pipe and guide pipe section that form a pipe that guides the oil inside the rear housing to the inside of the fixed scroll. and a decompression unit for lowering the pressure of oil moving along the conduit, wherein the decompression unit is provided with a fixed guide unit having a first protrusion helically protruding inside the guide conduit unit and a second protrusion engaged with the first protrusion and is fixed and an insert part coupled to the guide part and forming a pressure reducing passage through which the refrigerant moves between the first protrusion part and the second protrusion part.

Here, the first protrusion may have a thread shape protruding helically on the inside of the guide pipe, and the second protrusion may have a thread shape that protrudes helically along the outer circumference of the insert part and engages with the first protrusion.

In addition, the cross-section of the first protrusion may be formed in a cross-sectional shape of a truncated cone.

And the decompression passage may be formed in a spiral shape along the outer circumference of the insert portion.

In addition, the insert unit may include an insert body inserted into the fixing guide and provided with a second protrusion on the outside, and a head member connected to an end of the insert body and having a larger cross-sectional area than the insert body.

In addition, it may further include a filter member positioned inside the fixed guide facing the insert, filtering foreign substances contained in the oil moving along the fixed guide.

In another aspect of the present invention, an orbiting scroll connected to the drive shaft of the motor unit for supplying rotational power, a fixed scroll that supports the drive shaft and engages with the orbiting scroll to form a compression chamber, is installed in series with the orbiting scroll and is installed through the orbiting scroll The rear housing for discharging the discharged refrigerant to the outside, the guide pipe forming a pipe that guides the oil inside the rear housing in the direction toward the orbiting scroll, and the oil that is installed in the guide pipe and moves along the guide pipe and a decompression unit for lowering the pressure of the pressure reducing unit, the fixed guide unit having a first protrusion protruding spirally inside the guide pipe unit, and a second protrusion engaging the first protrusion unit, and is fastened to the fixed guide unit and provided with the second protrusion and an insert portion forming a decompression passage through which the refrigerant moves between the first protrusion and the second protrusion.

In addition, the guide conduit includes a first conduit communicating with the oil storage unit provided on the inner side of the rear housing, a second conduit connected to the first conduit, and a second conduit and a second conduit having an insert portion installed inside and having a larger diameter than the first conduit. It may include a third conduit that branches from and communicates with the outside of the rear housing and guides the discharge of oil moving along the decompression passage.

In addition, the third conduit may have one side connected to the second conduit and the other end extending in an inclined direction from the second conduit to be connected to a side surface of the rear housing facing the orbiting scroll.

In addition, the third conduit may form a groove on a side surface of the rear housing facing the orbiting scroll and be connected to the second conduit.

In addition, the first protrusion may have a thread shape protruding helically to the inside of the guide pipe, and the second protrusion may be helically protruded along the outer periphery of the insert part to have a thread shape engaged with the first protrusion.

In addition, the cross-section of the first protrusion may be formed in a cross-sectional shape of a truncated cone.

In addition, the pressure reducing passage may be formed in a spiral shape along the outer periphery of the insert portion.

In addition, the insert unit may include an insert body inserted into the fixing guide and provided with a second protrusion on the outside, and a head member connected to an end of the insert body and having a larger cross-sectional area than the insert body.

In addition, it may further include a filter member positioned inside the fixed guide facing the insert, filtering foreign substances contained in the oil moving along the fixed guide.

According to the scroll compressor according to the present invention, since the pressure reducing pin and the stopper, which have been conventionally used for decompression of oil, are formed of an insert part having an integrated structure, the number of parts for decompressing the oil pressure is reduced, thereby reducing material and parts management costs. can do.

In addition, since the decompression passage is spirally formed along the outer circumference of the insert, the length of the oil pressure reduction is increased compared to the conventional linear decompression passage, so that the product can be miniaturized.

In addition, since the present invention removes foreign substances contained in oil from the filter member installed inside the guide pipe part, it is possible to prevent operation abnormality caused by foreign substances, thereby improving operational reliability.

In addition to the above-described effects, the specific effects of the present invention will be described together while describing specific details for carrying out the invention below.

1 is a cross-sectional view schematically illustrating a structure of a scroll compressor according to an embodiment of the present invention.
2 is a cross-sectional view illustrating a decompression unit according to an embodiment of the present invention.
3 is an exploded perspective view of a scroll compressor according to an embodiment of the present invention.
4 is a perspective view of a scroll compressor according to an embodiment of the present invention.
5 is a cross-sectional view illustrating a decompression passage formed between the fixing guide part and the insert part according to an embodiment of the present invention.
6 is a view showing the amount of oil supply changed according to the size of the reduced pressure passage according to an embodiment of the present invention.
7 is a cross-sectional view schematically illustrating a structure of a scroll compressor according to another embodiment of the present invention.
8 is an exploded cross-sectional view of a decompression unit according to another embodiment of the present invention.
9 is an exploded perspective view of a scroll compressor according to another embodiment of the present invention.
10 is a cross-sectional view illustrating a decompression unit according to another embodiment of the present invention.
11 is an exploded cross-sectional view of a decompression unit according to another embodiment of the present invention.

The above-described objects, features and advantages will be described below in detail with reference to the accompanying drawings, and accordingly, those of ordinary skill in the art to which the present invention pertains will be able to easily implement the technical idea of the present invention. In describing the present invention, if it is determined that a detailed description of a known technology related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description will be omitted. Hereinafter, preferred embodiments according to 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.

Although the first, second, etc. are used to describe various elements, these elements are not limited by these terms, of course. These terms are only used to distinguish one component from other components, and unless otherwise stated, the first component may be the second component, of course.

In the following, that an arbitrary component is disposed on the "upper (or lower)" of a component or "upper (or below)" of a component means that any component is disposed in contact with the upper surface (or lower surface) of the component. Furthermore, it may mean that other components may be interposed between the component and any component disposed on (or under) the component.

Also, when it is described that a component is "connected", "coupled" or "connected" to another component, the components may be directly connected or connected to each other, but other components are "interposed" between each component. It is to be understood that “or, each component may be “connected,” “coupled,” or “connected” through another component.

Throughout the specification, unless otherwise stated, each element may be singular or plural.

As used herein, the singular expression includes the plural expression unless the context clearly dictates otherwise. In the present application, terms such as "consisting of" or "comprising" should not be construed as necessarily including all of the various components or various steps described in the specification, some of which components or some steps are It should be construed that it may not include, or may further include additional components or steps.

Throughout the specification, when “A and/or B” is used, it means A, B or A and B, unless specifically stated to the contrary, and when “C to D” is used, it means that there is no specific contrary description. Unless otherwise specified, it means C or more and D or less.

1 is a cross-sectional view schematically illustrating a structure of a scroll compressor according to an embodiment of the present invention, and FIG. 3 is an exploded perspective view of the scroll compressor according to an embodiment of the present invention.

1 and 3 , a scroll compressor 1 according to an embodiment of the present invention includes a housing 5 , a motor 45 , an inverter 70 and a compression unit 95 . can be done

The housing part 5 forms the exterior of the scroll compressor 1 according to the present embodiment. An inner space 14 for accommodating various components constituting the scroll compressor 1 is formed inside the housing 5 .

In this embodiment, the housing portion 5 is illustrated as being formed in a substantially cylindrical shape. The inlet 12 and the outlet 22 may be installed in the housing part 5 .

The suction port 12 is a passage formed in the housing part 5 for the refrigerant to flow into the housing part 5 . And the outlet 22 is a passage formed in the housing part 5 so that the refrigerant compressed inside the housing part 5 is discharged to the outside of the housing part 5 . The suction port 12 is provided on the other side of the housing part 5 in the first direction. And the outlet 22 is provided on the other side of the housing part 5 in the first direction.

define the direction In one embodiment of the present invention, the first direction is defined as a direction parallel to the extending direction of the driving shaft 60, which will be described later. Also, the second direction is defined as a direction in which a straight line connecting between the shortest distance points from the driving shaft 60 to the outer circumferential surface of the housing unit 5 extends. In FIG. 1 , the left-right direction is indicated as the first direction, and the up-down direction is indicated as the second direction. In addition, one side of the first direction is a right direction in FIG. 1 , and the other side of the first direction is a left direction in FIG. 1 .

Inside the housing part 5, a cylindrical inner space 14 may be formed. The inner space 14 of the housing part 5 is divided into a space in which the motor part 45 including the driving motor 50 is installed and a space in which the compression part 95 in which the refrigerant is compressed is installed. can

The housing part 5 may include a main housing 10 and a rear housing 20 . In addition, since the outer wall of the fixed scroll 100 installed between the main housing 10 and the rear housing 20 forms the outer wall of the scroll compressor 1, the housing unit 5 may be included in the housing unit 5. have.

The main housing 10 is disposed at the center of the housing part 5 and occupies most of the area of the housing part 5 . In this embodiment, the main housing 10 is formed in a cylindrical shape, it is exemplified as being formed in a cylindrical shape with one side and the other side open in the first direction.

The main housing 10 is provided with a suction port 12 through which the refrigerant flows, and the inverter unit 70 and the rear housing 20 are respectively connected to both sides of the main housing 10 to form a sealed inner space 14 . do.

Alternatively, the fixed scroll 100 may be positioned between the main housing 10 and the rear housing 20 , and an outer wall of the scroll compressor 1 may be formed like the main housing 10 and the rear housing 20 .

In addition, most of the components constituting the scroll compressor 1 such as the motor unit 45 , the fixed scroll 100 , and the orbiting scroll 110 may be accommodated in the main housing 10 .

The rear housing 20 is disposed on the other side of the main housing 10 in the first direction, more specifically, on the side closer to the orbiting scroll 110 than the motor unit 45 . The rear housing 20 may be coupled to the other open side of the main housing 10 , and may be installed at a position facing the main housing 10 with the fixed scroll 100 interposed therebetween.

The rear housing 20 is installed in succession to the fixed scroll 100 , and may discharge the refrigerant discharged through the fixed scroll 100 to the outside. In addition, the main housing 10, the fixed scroll 100, and the rear housing 20 may be coupled in succession to provide the housing 5.

And the rear housing 20 having the outlet 22 through which the compressed refrigerant is discharged forms a space in which the high-pressure refrigerant discharged through the fixed scroll 100 is collected. In addition, an oil separator (not shown) is installed inside the rear housing 20 to separate oil contained in the high-pressure refrigerant from the refrigerant.

The rear housing 20 is connected to a shape surrounding the other side of the fixed scroll 100 , and one side of the fixed scroll 100 is fixed to the main housing 10 . On the other hand, since the inverter part 70 is connected to one side of the main housing 10 in the first direction, the inside of the housing part 5 forms a closed space except for the inlet 12 and the outlet 22 . The inverter unit 70 is provided to control the driving of the driving motor 50 .

An oil separation unit is installed inside the rear housing 20 , and after compression is performed in the compression unit 95 , the oil contained in the refrigerant moving toward the outlet 22 is separated. The oil separated from the refrigerant in the oil separation unit is collected in the oil storage unit 24 provided inside the rear housing 20 .

In addition, the oil storage unit 24 is connected to the guide pipe unit 150 for supplying oil to the inside of the compression unit 95 . For example, the guide pipe part 150 has a pipe shape communicating the outside and the inside of the fixed scroll 100 , and is formed in the fixed scroll 100 facing the oil storage part 24 .

The motor unit 45 may include a driving motor 50 . The driving motor 50 is accommodated in the inner space 14 provided inside the main housing 10 , and may be disposed closer to the suction port 12 than the fixed scroll 100 and the orbiting scroll 110 . The driving motor 50 may include a stator 52 fixed to the inside of the inner space 14 and a rotor 54 rotatably installed inside the stator 52 . In addition, as the driving motor 50 , a constant speed motor having the same rotation speed of the rotor 54 may be used, but an inverter motor in which the rotation speed of the rotor 54 may be varied may be used.

Also, the motor unit 45 may further include a driving shaft 60 connected to the driving motor 50 . A drive shaft 60 is connected to the rotor 54 of the drive motor 50 , and the drive shaft 60 coupled to the rotor 54 and rotating together with the rotor 54 is generated by the drive motor 50 . It can be rotated by the rotational force. The driving shaft 60 is connected to the orbiting scroll 110 so that the power of the driving shaft 60 can be transmitted to the orbiting scroll 110 , and the orbiting scroll 110 can perform a pivoting motion.

The driving shaft 60 may be provided in a cylindrical shape having a length extending in the first direction. The drive shaft 60 is installed to pass through the center of rotation of the rotor 54 and is connected to the rotor 54 so that it can be rotated together with the rotor 54 .

To this end, a first bushing part 82 is installed on the outside of the driving shaft 60 facing the fixed scroll 100, and a second bushing part 84 is installed on the outside of the driving shaft 60 facing the orbiting scroll 110. is installed The first bush portion 82 is provided to rotatably support the drive shaft 60 penetrating the fixed scroll 100 . And the second bush portion 84 is provided to support a part of the driving shaft 60 that penetrates the fixed scroll 100 and protrudes toward the orbiting scroll 110 .

The driving shaft 60 may be rotatably supported by the shaft support 106 provided in the fixed scroll 100 and the inner support 16 provided in the main housing 10 . A first bushing part 82 may be installed between the shaft support part 106 and the driving shaft 60 . The first bush portion 82 may support the drive shaft 60 in the second direction, that is, in a radial direction so that the drive shaft 60 can stably rotate.

And the second bushing part 84 is installed on the other side of the first bushing part 82 in the first direction. The driving shaft 60 may be rotatably supported by the second bushing portion 84 installed inside the orbiting scroll 110 .

And a third bushing part 86 is installed on the other side of the second bushing part 84 in the first direction. The driving shaft 60 may be rotatably supported by the third bushing part 86 installed inside the inner support part 16 .

According to this embodiment, the drive shaft 60 may be supported at three points in total by the first bush portion 82 , the second bush portion 84 , and the third bush portion 86 , thereby the drive shaft 60 . can be stably supported.

Meanwhile, the driving shaft 60 may include a rotating shaft portion 62 and an eccentric shaft portion 64 . The rotating shaft part 62 is rotated by the driving motor 50 and includes a part rotatably supported by the inner support part 16 and extends in the first direction.

The eccentric shaft portion 64 may be said to be the remaining portion of the drive shaft 60 excluding the rotation shaft portion 62 . The eccentric shaft portion 64 may extend from the rotation shaft portion 62 to the other side in the first direction, and may extend eccentrically. The eccentric shaft portion 64 may be rotatably supported by being inserted into the first bushing portion 82 . Since the eccentric shaft portion 64 is connected to the inside of the orbiting scroll 110 , the rotational power of the driving shaft 60 is transmitted to the orbiting scroll 110 .

Also, an inner conduit 66 for guiding the movement of oil may be installed inside the drive shaft 60 . As an example, the inner conduit 66 starts from the other end of the drive shaft 60 and is discharged to the side surface of the drive shaft 60 .

4 is a perspective view of a scroll compressor according to an embodiment of the present invention. 1 and 4 , the compression unit 95 operated by the rotation of the driving shaft 60 may include a fixed scroll 100 and an orbiting scroll 110 .

The fixed scroll 100 is positioned between the orbiting scroll 110 and the rear housing 20 . The fixed scroll 100 is disposed adjacent to the outlet 22 side rather than the driving motor 50 disposed in the motor unit 45 .

For example, the fixed scroll 100 is positioned between the rear housing 20 and the main housing 10, and the rear housing 20 and the main housing 10 are respectively connected to both sides of the fixed scroll 100. . For example, the fixed scroll 100 may include a fixed end plate 102 and a fixed wrap 104 .

The fixed wrap 104 may be engaged with the orbiting wrap 114 of the orbiting scroll 110 to form a compression chamber P. Also, the fixed head plate part 102 may be disposed between the orbiting head plate part 112 of the orbiting scroll 110 and the rear housing 20 . The fixed end plate 102 may be formed in a substantially circular plate shape. In addition, the fixed wrap 104 may be formed to protrude from one side of the fixed end plate 102 facing the orbiting scroll 110 to one side in the first direction.

The orbiting scroll 110 receiving power through the drive shaft 60 is coupled to the fixed scroll 100 to form a compression chamber (P) and rotates. This orbiting scroll (110) is disposed between the suction port (12) and the fixed scroll (100). That is, the orbiting scroll 110 may be disposed closer to the driving motor 50 than the fixed scroll 100 . This orbiting scroll (110) is engaged with the fixed scroll (100) to form a compression chamber (P).

For example, the orbiting scroll 110 may include a turning head plate part 112 and a turning wrap 114 .

The revolving mirror plate part 112 may be formed in a substantially disk shape. A plane facing the fixed head plate 102 may be formed on the other side of the revolving head plate part 112 . The revolving wrap 114 may be formed to protrude from the other side of the revolving head plate 112 facing the fixed head plate 102 to the other side in the first direction. This orbiting wrap 114 may be engaged with the fixed wrap 104 to form a compression chamber (P).

The orbiting scroll 110 connected to the drive shaft 60 of the motor unit 45 for supplying rotational power is disposed between the fixed scroll 100 and the inner support unit 16 . And the refrigerant compressed in the compression chamber (P) is discharged to the inside of the rear housing (20) through the fixed scroll (100), passes through the oil separation unit provided in the rear housing (20), and then passes through the outlet (22) It may be discharged to the outside of the scroll compressor 1 through the

1 and 5 , the scroll compressor 1 according to the present embodiment may further include an anti-rotation unit 140 . The anti-rotation unit 140 is installed at a position facing the orbiting scroll 110 to prevent rotation of the orbiting scroll 110 and various modifications are possible within the technical idea of guiding the orbiting motion.

As an example, the anti-rotation unit 140 may be provided with an Oldham's ring that rotates while preventing the orbiting scroll 110 from rotating.

2 is a cross-sectional view illustrating the decompression unit 160 according to an embodiment of the present invention, and FIG. 5 is a decompression formed between the fixing guide unit 170 and the insert unit 180 according to an embodiment of the present invention. It is a cross-sectional view showing the passage (A).

1, 2 and 5, the guide pipe 150 separates the refrigerant from the oil separation unit and guides the oil stored inside the rear housing 20 to the inside of the fixed scroll 100, , it is possible to transform into various shapes within the technical idea that the pressure reducing unit 160 and the filter member 190 are installed inside the guide pipe part 150 .

The guide pipe 150 may have the same overall diameter, and the diameter of the portion where the pressure reducing unit 160 is not installed may be smaller than the diameter of the portion where the pressure reducing unit 160 is installed. The guide pipe part 150 according to an embodiment of the present invention is installed on the fixed scroll 100 .

A guide pipe 150 for guiding the movement of oil is installed on the fixed scroll 100 facing the oil storage unit 24 of the rear housing 20 . One side of the guide pipe part 150 is connected to the oil storage part 24 , and the other side communicates with the inner space of the fixed scroll 100 facing the drive shaft 60 .

The main conduit 152 provided in the guide conduit 150 extends in a linear direction, and the inner diameter of the portion in which the head member 186 of the decompression unit 160 is positioned is the largest. And, the inner diameter of the portion where the fixing guide 170 is located is smaller than the inner diameter of the portion where the head member 186 of the decompression unit 160 is located, and the oil passing through the filter member 190 is transferred to the fixed scroll 100 ), the inner diameter of the pipe leading to the inside is the smallest.

The guide pipe 150 includes a main pipe 152 in which the decompression unit 160 is installed and a side pipe 154 for supplying oil to the main pipe 152 . Since the side pipe line 154 connects the oil storage unit 24 and the main pipe line 152 , a path for supplying oil to the pressure reducing unit 160 is formed.

The decompression unit 160 is installed in the guide pipe part 150 and can be deformed into various shapes within the technical idea of lowering the pressure of oil moving along the guide pipe part 150 . The decompression unit 160 according to an embodiment of the present invention includes a fixing guide unit 170 and an insert unit 180 .

The fixed guide 170 includes a first protrusion 172 helically protruding inside the guide pipe 150 . And the insert part 180 has a second protrusion 184 engaged with the first protrusion 172 and is fastened to the fixing guide 170 .

The insert unit 180 according to an embodiment may include an insert body 182 and a head member 186 . The insert body 182 is inserted into the fixing guide portion 170, and the second protrusion portion 184 is provided on the outside. And the head member 186 is connected to an end of the insert body 182 and has a larger cross-sectional area than the insert body 182 .

The first protrusion 172 has a screw thread shape protruding helically on the inside of the guide pipe 150 , and the second protrusion 184 protrudes helically along the outer periphery of the insert unit 180 to the first protrusion 172 . ) may be made in the shape of a screw thread engaged with.

A decompression passage A through which the refrigerant moves is formed between the first protrusion 172 and the second protrusion 184 . To this end, the cross-section of the first protrusion 172 may be formed in the shape of a truncated cone. Since the end of the first protrusion 172 inserted into the screw bone of the second protrusion 184 is processed in a planar shape, a pressure-reducing passage between the protruding end of the first protrusion 172 and the groove of the second protrusion 184 ( A) is formed.

This decompression passage (A) may be formed in a spiral shape along the outer circumference of the insert (180).

The oil in the oil storage unit 24 moves inside the main conduit 152 through the side conduit 154 , and passes through the decompression unit 160 located inside the main conduit 152 to reduce the pressure.

The flow rate of oil passing through the decompression passage (A) can be inferred through the Hagen-Poiseuille equation.

[식 1]

[Equation 1]

In [Equation 1], D is a value obtained by subtracting the outer diameter of the second protrusion 184 from the inner diameter of the first protrusion 172 facing the decompression passage A, and L is the first in which the decompression passage A is formed. The length of the protrusion 172 . And μ is the oil viscosity, Q is the oil flow rate, and ΔP is the pressure difference.

The decompression method using the gap between the threads is less sensitive to the gap than the decompression method using the existing decompression pin.

The amount of oil transferred using a conventional pressure reducing pin is about 110 to 130 cc per minute. Therefore, using [Equation 1], Fig. 6, which summarizes the correlation between the oil supply amount and the hole size as a diagram, and [Table 1] summarizing the maximum flow rate and the design oil supply amount according to the screw type of the insert body 182 can be derived. can

[Table 1]

Here, FIG. 6 is a view showing the amount of oil supply changed according to the size of the reduced pressure passage according to an embodiment of the present invention.

As shown in Figure 6 and [Table 1], the insert portion 180 corresponding to the bolt of M6 and the fixing guide portion 170 corresponding to the insert portion 180 are installed, so while supplying a flow rate similar to that of the prior art. , it is possible to reduce cost and parts management cost by integrating two members consisting of a conventional pressure reducing pin and a plug bolt into one.

In addition, since the second protrusion 184, which is a spiral groove, is formed in the insert portion 180 having the shape of a plug bolt, the pressure reduction passage A is formed in a spiral shape, thereby reducing the pressure reduction portion.

Meanwhile, the filter member 190 is positioned inside the fixed guide 170 facing the insert 180 and filters foreign substances contained in the oil moving along the fixed guide 170 .

Hereinafter, an operating state of the scroll compressor 1 according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 and 2, the refrigerant compressed in the compression chamber P formed between the fixed scroll 100 and the orbiting scroll 110 constituting the compression unit 95 is combined with the oil in the rear housing ( 20), the refrigerant and oil are separated in the oil separation unit.

The oil separated from the refrigerant in the oil separation unit is moved to the oil storage unit 24 provided inside the rear housing 20 . The oil stored in the oil storage unit 24 moves to the inside of the main conduit 152 through the side conduit 154 .

The oil moved to the inside of the main conduit 152 rotates spirally along the decompression passage A formed between the fixed guide unit 170 and the insert unit 180 to reduce the pressure. The decompressed oil is moved to the inside of the fixed scroll 100 and then moved along the inner conduit 66 of the drive shaft 60 to lubricate and back pressure for pressing the orbiting scroll 110 .

Hereinafter, a scroll compressor according to another embodiment of the present invention will be described with reference to the drawings.

For convenience of description, components having the same configuration and operation as those of an embodiment of the present invention are referred to by the same reference numerals, and detailed description thereof will be omitted.

7 is a cross-sectional view schematically illustrating a structure of a scroll compressor according to another embodiment of the present invention, and FIG. 9 is an exploded perspective view of the scroll compressor according to another embodiment of the present invention.

7 and 9 , the scroll compressor 200 according to another embodiment of the present invention includes a housing 210 , a motor 260 , an inverter 290 , and a compression unit 310 . can be done

The housing 210 forms the exterior of the scroll compressor 200 according to the present embodiment. An inner space 224 for accommodating various components constituting the scroll compressor 200 is formed inside the housing 210 .

The housing unit 210 may include a main housing 220 and a rear housing 230 .

The main housing 220 is disposed at the center of the housing unit 210 and occupies most of the area of the housing unit 210 . In this embodiment, the main housing 220 is formed in a cylindrical shape, it is exemplified as being formed in a cylindrical shape with one side and the other side open in the first direction.

define the direction In another embodiment of the present invention, the first direction is defined as a direction parallel to a direction in which the driving shaft 280, which will be described later, extends. Also, the second direction is defined as a direction in which a straight line connecting between the shortest distance points from the driving shaft 280 to the outer circumferential surface of the housing unit 210 extends. In FIG. 7 , the left-right direction is indicated as the first direction, and the up-down direction is indicated as the second direction. In addition, one side of the first direction is a right direction in FIG. 7 , and the other side of the first direction is a left direction in FIG. 7 .

The main housing 220 is provided with a suction port 222 through which the refrigerant flows, and since the inverter unit 290 and the rear housing 230 are connected to both sides of the main housing 220, a sealed inner space 224 is formed. .

The rear housing 230 is disposed on the other side of the main housing 220 in the first direction, more specifically, on a side closer to the fixed scroll 320 and the orbiting scroll 330 than the motor unit 260 . The rear housing 230 may be coupled to the other open side of the main housing 220 , thereby providing the housing unit 210 in which the main housing 220 and the rear housing 230 are combined into one.

In addition, an outlet 232 through which the compressed refrigerant is discharged may be provided in the rear housing 230 . The rear housing 230 forms a space in which the high-pressure refrigerant discharged through the orbiting scroll 330 is collected. In addition, an oil separation unit 240 is installed inside the rear housing 230 to separate the oil contained in the high-pressure refrigerant from the refrigerant.

The rear housing 230 is installed in a shape surrounding the orbiting scroll 330 , and is fixed to the main housing 220 . Meanwhile, since the inverter unit 290 is connected to one side of the main housing 220 in the first direction, the inside of the housing unit 210 forms a closed space except for the suction port 222 and the discharge port 232 . The inverter unit 290 is provided to control the driving of the driving motor 270 .

An oil separation unit 240 is installed inside the rear housing 230 , and after compression is performed in the compression unit 310 , the oil contained in the refrigerant moving toward the outlet 232 is separated. The oil separated from the refrigerant in the oil separation unit 240 is collected in the oil storage unit 234 provided inside the rear housing 230 . The oil storage unit 234 communicates with the oil separation unit 240 and has a space inside which oil is stored. Also, since the oil separation unit 240 is connected to the return pipe unit 40 , the oil stored in the oil separation unit 240 moves in the direction in which the orbiting scroll 330 is installed through the return pipe unit 40 .

For example, the oil separation unit 240 is installed inside the pipeline communicating with the discharge port 232 , and the oil contained in the refrigerant passing through the oil separation unit 240 falls to the lower side of the oil separation unit 240 and the rear It is stored in the oil storage unit 234 provided inside the housing 230 .

8 is an exploded cross-sectional view of a decompression unit according to another embodiment of the present invention.

As shown in FIGS. 7 and 8 , the guide pipe part 400 has various shapes within the technical idea of forming a pipe for guiding the oil inside the rear housing 230 in the direction toward the orbiting scroll 330 . Transformation is possible. The guide conduit 400 according to another embodiment of the present invention includes a first conduit 402 , a second conduit 404 , and a third conduit 406 .

The first conduit 402 communicates with the oil storage unit 234 provided inside the rear housing 230 and extends in the first direction. The second conduit 404 is connected to the first conduit 402 and an insert portion 420 is installed inside. The second conduit 404 also extends in the first direction together with the first conduit 402 , and has a larger diameter than the first conduit 402 .

The third conduit 406 is branched from the second conduit 404 and communicates with the outside of the rear housing 230 , and guides the discharge of oil moving along the decompression path (not shown). One side of the third conduit 406 is connected to the second conduit 404 , and the other side of the rear housing 230 extends in an inclined direction from the second conduit 404 and faces the orbiting scroll 330 . can be connected to

The oil moved from the oil storage unit 234 to the first conduit 402 moves to the outside of the third conduit 406 through the second conduit 404 . A discharge hole (not shown) is provided in the trust plate 340 facing the third conduit 406 . Accordingly, the oil discharged through the third conduit 406 moves to the intermediate pressure region M through the discharge hole of the thrust plate 340 .

The decompression unit 410 according to another embodiment of the present invention is installed in the guide pipe part 400 and can be deformed into various shapes within the technical idea of lowering the pressure of oil moving along the guide pipe part 400 . The decompression unit 410 according to another embodiment of the present invention includes a fixing guide unit 412 and an insert unit 420 .

The fixed guide 412 includes a first protrusion 414 helically protruding inside the guide pipe 400 . And the insert portion 420 has a second protrusion 424 engaged with the first protrusion 414 and is fastened to the fixing guide 412 .

The insert part 420 according to another embodiment of the present invention may include an insert body 422 and a head member 426 . The insert body 422 is inserted into the fixing guide part 412 , and a second protrusion part 424 is provided on the outside. And the head member 426 is connected to the end of the insert body 422 and has a larger cross-sectional area than the insert body 422 .

The first protrusion 414 has a thread shape protruding helically on the inside of the guide pipe 400 , and the second protrusion 424 helically protrudes along the outer periphery of the insert part 420 , and the first protrusion 414 . ) may be made in the shape of a screw thread engaged with.

A decompression passage through which the refrigerant moves is formed between the first protrusion 414 and the second protrusion 424 . To this end, the cross-section of the first protrusion 414 may have a truncated cross-sectional shape. Since the end of the first protrusion 414 inserted into the screw bone of the second protrusion 424 is processed in a planar shape, a pressure-reducing passage is formed between the protruding end of the first protrusion 414 and the groove of the second protrusion 424. is formed The decompression passage may be formed in a spiral shape along the outer circumference of the insert portion 420 . Since the configuration in which the oil is depressurized through the decompression passage has been described in an embodiment of the present invention, a detailed description thereof is omitted.

The oil in the oil storage unit 234 moves inside the main conduit 152 through the side conduit 154 , and passes through the decompression unit 410 inside the main conduit 152 to reduce the pressure.

On the other hand, the filter member 500 is positioned inside the fixed guide portion 412 facing the insert portion 420 , and filters foreign substances contained in the oil moving along the fixed guide portion 412 .

7 and 9 , the motor unit 260 may include a driving motor 270 . The driving motor 270 is accommodated in the inner space 224 provided inside the main housing 220 , and may be disposed closer to the suction port 222 than the fixed scroll 320 and the orbiting scroll 330 . The driving motor 270 may include a stator 272 fixed to the inside of the inner space 224 and a rotor 274 rotatably installed inside the stator 272 . Also, as the driving motor 270 , a constant speed motor having the same rotation speed of the rotor 274 may be used, but an inverter motor in which the rotation speed of the rotor 274 may be varied may be used.

The motor unit 260 may further include a driving shaft 280 connected to the driving motor 270 . A drive shaft 280 is connected to the rotor 274 of the drive motor 270 , and the drive shaft 280 coupled to the rotor 274 and rotating together with the rotor 274 is generated by the drive motor 270 . It can be rotated by the rotational force. This driving shaft 280 is installed through the inside of the fixed scroll 320, is fixed to the orbiting scroll 330, the rotation of the driving shaft 280 and the orbiting scroll 330 can be synchronized, and the orbiting scroll 330 is coupled to the drive shaft 280 to perform a turning motion.

The driving shaft 280 may be provided in a cylindrical shape having a length extending in the first direction. The drive shaft 280 is installed to pass through the center of rotation of the rotor 274 and is connected to the rotor 274 so that it can be rotated together with the rotor 274 .

To this end, a first bushing part 302 is installed on the outside of the driving shaft 280 facing the fixed scroll 320, and a second bushing part 304 is installed on the outside of the driving shaft 280 facing the orbiting scroll 330. is installed The first bush portion 302 is provided to rotatably support the drive shaft 280 penetrating the fixed scroll 320 . And the second bushing portion 304 is provided to support a part of the driving shaft 280 protruding toward the orbiting scroll 330 through the fixed scroll 320 .

The drive shaft 280 may be rotatably supported by the shaft support part 326 provided on the fixed scroll 320 . Between the shaft support part 326 and the driving shaft 280, the first bushing part 302 may be installed. The first bushing portion 302 may support the drive shaft 280 in the second direction, that is, in the radial direction so that the drive shaft 280 can stably rotate.

In addition, the other side of the drive shaft 280 in the first direction, that is, the other side of the drive shaft 280 in the longitudinal direction, may be rotatably supported by the second bush portion 304 provided on the orbiting scroll 330 .

One end of the drive shaft 280 in the first direction is inserted into the main bearing 300 to be rotatably supported. The main bearing 300 may radially support one end of the drive shaft 280 so that the drive shaft 280 can rotate stably.

According to the present embodiment, the drive shaft 280 may be supported at three points in total by the main bearing 300 , the first bushing portion 302 , and the second bushing portion 304 , thereby supporting the drive shaft 280 . can be done stably.

In addition, in this embodiment, a separate configuration for supporting the drive shaft 280 like the main frame is not provided, but the role of the main frame can be effectively replaced by the fixed scroll 320 .

That is, the central portion in the longitudinal direction of the driving shaft 280, which is a part supported by the main frame in the prior art, can be stably supported by the shaft support part 326 provided on the fixed scroll 320, and thus the fixed scroll 320 without the main frame. Thus, the support of the driving shaft 280 can be made stably.

To this end, the shaft support portion 326 is formed to protrude a predetermined length from the fixed head plate portion 322 of the fixed scroll 320 in the first direction, that is, in the longitudinal direction of the driving shaft 280 . In this case, the shaft support part 326 may be formed to protrude in a direction toward the driving motor 270 located on one side in the first direction.

Since the orbiting scroll 330 is engaged with the fixed scroll 320 on the other side of the fixed scroll 320 in the first direction, there is no space for the shaft support part 326 to protrude from the other side of the fixed scroll 320 in the first direction. . In consideration of this point, the shaft support part 326 may be formed to protrude to the opposite side of the place where the orbiting scroll 330 is disposed with respect to the fixed scroll 320 .

The reason that the shaft support part 326 is formed to protrude a predetermined length as described above is to increase the area in which the driving shaft 280 is supported by the shaft support part 326 . At this time, the length of the shaft support part 326 protruding toward the driving motor 270 is preferably set to a length that does not interfere with the driving motor 270 .

Meanwhile, the driving shaft 280 may include a rotating shaft portion 282 and an eccentric shaft portion 284 .

The rotating shaft portion 282 is rotated by the driving motor 270 and includes a portion rotatably supported by the fixed scroll 320 . This rotating shaft part 282 is, among the driving shafts 280 , from one end of the driving shaft 280 supported by the main bearing 300 in the first direction to the driving shaft 280 supported by the first bushing part 302 . It may include a region up to the other side.

The eccentric shaft portion 284 may be referred to as the remaining portion of the drive shaft 280 excluding the rotation shaft portion 282 . The eccentric shaft portion 284 may extend from the rotation shaft portion 282 to the other side in the first direction, and may extend eccentrically. The eccentric shaft portion 284 may be rotatably supported by being inserted into the second bushing portion 304 . Since the eccentric shaft portion 284 is connected to the inside of the orbiting scroll 330 , the rotational power of the driving shaft 280 is transmitted to the orbiting scroll 330 .

Meanwhile, the compression unit 310 operated by the rotation of the driving shaft 280 may include a fixed scroll 320 and a fixed scroll 320 .

The fixed scroll 320 is provided in the compression unit 310 located in the inner space 224 of the housing unit 210 . The fixed scroll 320 is disposed adjacent to the outlet 232 side rather than the driving motor 270 disposed in the motor unit 260 .

For example, the fixed scroll 320 disposed in the inner space 224 of the housing 210 is positioned between the driving motor 270 and the rear housing 230 . Also, the fixed scroll 320 is positioned between the orbiting scroll 330 and the driving motor 270 and is fixed to the main housing 220 . The fixed scroll 320 may include a fixed end plate 322 and a fixed wrap 324 .

The fixed wrap 324 may be engaged with the orbiting scroll 330 , more specifically, the orbiting wrap 334 to form a compression chamber P. Also, the fixed end plate 322 may be disposed between the fixed wrap 324 and the driving motor 270 . The fixed head plate part 322 may be formed in a substantially disk shape. In addition, the fixed wrap 324 may be formed to protrude from the other side of the fixed end plate 322 facing the orbiting scroll 330 to the other side in the first direction.

In addition, the fixed scroll 320 may further include a shaft support portion (326). The shaft support portion 326 may protrude from the fixed end plate portion 322 in a direction parallel to the fixed wrap 324 , that is, the other side in the first direction.

The orbiting scroll 330 receiving power through the drive shaft 280 is coupled to the fixed scroll 320 to form a compression chamber (P) and pivot. The orbiting scroll 330 is disposed between the outlet 232 and the fixed scroll 320 . That is, the orbiting scroll 330 may be disposed at a position farther from the driving motor 270 than the fixed scroll 320 . This orbiting scroll 330 is engaged with the fixed scroll 320 to form a compression chamber (P).

According to this embodiment, the driving shaft 280 passes through the fixed scroll 320, and the end of the driving shaft 280 is connected to the orbiting scroll 330, so that the orbiting scroll 330 is rotated by the rotation of the driving shaft 280. Move.

The orbiting scroll 330 may include a turning head plate part 332 and a turning wrap 334 . The revolving mirror plate part 332 may be formed in a substantially disk shape. A plane facing the thrust plate 340 may be formed on the other side of the revolving mirror plate part 332 . And on one side of the revolving head plate part 332, a plane facing the fixed head plate part 322 may be formed.

The orbiting wrap 334 may be formed to protrude from one side of the turning head plate part 332 facing the fixed head plate part 322 to one side in the first direction. The orbiting wrap 334 may be engaged with the fixed wrap 324 to form a compression chamber P.

The orbiting scroll 330 is disposed between the fixed scroll 320 and the trust plate 340 . In addition, the orbiting scroll 330 may be provided with a discharge port. The discharge port may be disposed on the other side of the orbiting scroll 330 facing the thrust plate 340 .

Specifically, the discharge port may be formed to penetrate through the revolving mirror plate part 332 in the first direction. Such a discharge port forms a passage through which the refrigerant compressed in the compression chamber P is discharged toward a space provided inside the rear housing 230 .

Accordingly, the refrigerant compressed in the compression chamber P is discharged to the inside of the rear housing 230, passes through the oil separator 240 provided in the rear housing 230, and then through the discharge port 232 to the scroll compressor ( 200) can be discharged to the outside.

Meanwhile, a trust plate 340 may be provided on the other side of the orbiting scroll 330 in the first direction. The trust plate 340 is located between the orbiting scroll 330 and the rear housing 230, and can be deformed into various shapes within the technical concept of having a passage for the refrigerant compressed in the compression chamber P to move. .

In addition, a hole for moving the oil discharged through the guide pipe portion 400 to the intermediate pressure region M is separately provided in the trust plate 340 .

The scroll compressor 200 according to another embodiment of the present invention may further include an anti-rotation unit 350 . The anti-rotation unit 350 is disposed between the orbiting scroll 330 and the trust plate 340 to prevent the orbiting scroll 330 from rotating and various modifications are possible within the technical idea of guiding the orbiting motion.

As an example, the anti-rotation unit 350 may include a guide ring 352 and a guide pin 356 . A guide ring 352 may be provided on any one of the orbiting scroll 330 and the trust plate 340 , and a guide pin 356 may be installed on the other of the orbiting scroll 330 and the trust plate 340 . In this embodiment, a guide ring 352 is installed on the orbiting scroll 330 and a guide pin 356 is installed on the trust plate 340 facing the orbiting scroll 330 to prevent the orbiting scroll 330 from rotating. and guides the turning operation of the orbiting scroll 330, so that the operation of the orbiting scroll 330 is performed stably, thereby improving operational reliability.

For example, the anti-rotation unit 350 is formed in a ring shape and has a guide ring 352 fixed to the orbiting scroll 330 , and one side is fixed to the trust plate 340 , and the other side is located inside the guide ring 352 . It may include a guide pin (356). In addition, since a plurality of guide rings 352 and guide pins 356 can be installed along the periphery of the side of the orbiting scroll 330 facing the thrust plate 340, the impact generated when performing the anti-rotation operation can be reduced. can

In addition, the guide ring 352 may be fixed by being inserted into the concave-shaped side groove portion 336 provided on the side surface of the orbiting scroll 330 . The guide ring 352 may be inserted into the side groove portion 336 concavely formed on one side of the pivot plate portion 332 facing the thrust plate 340 . That is, the guide ring 352 may be installed in the side groove portion 336 provided on a surface different from the surface on which the turning wrap 334 is formed on the turning mirror plate part 332 .

In addition, the guide pin 356 may be provided in a slender cylindrical shape having a length extending in the first direction. One side of the guide pin 356 is installed in a form in which at least a portion is inserted into the side groove portion 336 or the guide ring 352 . The other side of the guide pin 356 may be installed on the trust plate 340 .

The guide pin 356 installed in this way is provided to protrude toward the guide ring 352 or the side groove portion 336 , and at least a portion of the guide pin 356 provided in this way is the guide ring 352 or the side groove portion 336 . ) can be inserted into the inner region of

In addition, when the guide ring 352 is installed inside the side groove 336 of the orbiting scroll 330 , the portion where abrasion occurs due to the revolution of the guide pin 356 is the guide pin 356 and the guide ring 352 . Limited. The orbiting scroll 330 in which the guide ring 352 is installed hardly wears.

In addition, since the guide pin 356 and the guide ring 352 can be detachably coupled to the thrust plate 340 and the orbiting scroll 330, respectively, the guide pin 356 and the guide ring 352 can be replaced if necessary. Maintenance can be done quickly and easily.

According to this embodiment, a plurality of guide pins 356 are provided between the trust plate 340 and the orbiting scroll 330 , and the plurality of guide pins 356 are spaced apart at a predetermined distance along the circumferential direction of the orbiting scroll 330 . are spaced apart. In addition, the side groove portion 336 and the guide ring 352 installed therein may also be provided in the same number as the guide pin 356 and disposed at a position corresponding to the position of the guide pin 356 .

The anti-rotation action is made at a plurality of points by the plurality of side grooves 336, the guide ring 352, and the guide ring 352 provided in this way, whereby the orbiting scroll 330 can be turned more stably. be able to

The number of guide pins 356 may be appropriately selected according to the type and capacity of the compressor.

Hereinafter, an operating state of the scroll compressor 200 according to another embodiment of the present invention will be described in detail with reference to the accompanying drawings.

7 to 9, the refrigerant compressed in the compression chamber P formed between the fixed scroll 320 and the orbiting scroll 330 constituting the compression unit 310 is combined with oil in the rear housing ( After moving to 230), the refrigerant and oil are separated in the oil separation unit 240 .

The oil separated from the refrigerant in the oil separation unit 240 is moved to the oil storage unit 234 provided inside the rear housing 230 . As shown in FIG. 8 , the oil stored in the oil storage unit 234 moves along the guide pipe unit 400 formed inside the rear housing 230 and the pressure is reduced.

The oil moved through the first conduit 402 of the guide conduit 400 passes through the filter member 500 provided inside the second conduit 404 and foreign substances are removed. Then, it passes through the decompression passage provided between the insert portion 420 and the fixing guide portion 412 , and after the oil is decompressed, it moves in the direction toward the trust plate 340 through the second conduit 404 .

Then, it moves to the intermediate pressure region M in which the orbiting scroll 330 is installed through the hole provided in the trust plate 340 .

The intermediate pressure region M is a section formed between the orbiting scroll 330 and the rear housing 230 . The intermediate pressure region M has a pressure lower than the pressure of the refrigerant discharged from the compression chamber P, and presses the orbiting scroll 330 in a direction in contact with the fixed scroll 320 .

10 is a cross-sectional view illustrating a decompression unit according to another embodiment of the present invention, and FIG. 11 is an exploded cross-sectional view illustrating a decompression unit according to another embodiment of the present invention.

As shown in FIGS. 10 and 11 , the guide conduit 401 according to another embodiment of the present invention includes a first conduit 402 , a second conduit 404 , and a third conduit 408 . .

The first conduit 402 communicates with the oil storage unit 234 provided inside the rear housing 230 and extends in the first direction. The second conduit 404 is connected to the first conduit 402 and an insert portion 420 is installed inside. The second conduit 404 also extends in the first direction together with the first conduit 402 , and has a larger diameter than the first conduit 402 .

The third conduit 408 forms a groove on a side surface of the rear housing 230 facing the orbiting scroll 330 and may be connected to the second conduit 404 . The third conduit 408 has a passage through which oil is discharged on the side surface of the head member 426 in order to prevent the oil discharge passage from being blocked by the head member 426 of the insert part 420 .

Therefore, the oil, which has been decompressed while passing through the decompression unit 410 provided inside the second conduit 404, moves through the third conduit 408 provided on the side of the head member 426, and then the trust plate 340. It passes through and moves to the intermediate pressure region (M).

As described above, the present invention has been described with reference to the illustrated drawings, but the present invention is not limited by the embodiments and drawings disclosed in this specification, and various methods can be obtained by those skilled in the art within the scope of the technical spirit of the present invention. It is obvious that variations can be made. In addition, although the effects according to the configuration of the present invention are not explicitly described and described while describing the embodiments of the present invention, it is natural that the effects predictable by the configuration should also be recognized.

1: Scroll Compressor
5: housing part;
10: main housing 12: intake port 14: inner space 16: inner support part
20: rear housing 22: outlet 24: oil storage unit
45: motor unit
50: drive motor 52: stator 54: rotor
60: drive shaft 62: rotation shaft portion 64: eccentric shaft portion 66: inner pipe passage
70: inverter unit
82: first bush part 84: second bush part 86: third bush part
95: compression unit
100: fixed scroll 102: fixed end plate 104: fixed wrap
110: orbiting scroll 112: orbiting head plate 114: orbiting wrap
140: anti-rotation unit
150: guide pipe 152: main pipe 154: side pipe
160: decompression unit 170: fixing guide unit 172: first protrusion 180: insert unit 182: insert body 184: second protrusion 186: head member
190: filter member
200: scroll compressor
210: housing unit
220: main housing 222: intake 224: inner space
230: rear housing 232: outlet 234: oil storage unit
240: oil separation unit
260: motor unit
270: drive motor 272: stator 274: rotor
280: drive shaft 282: rotation shaft portion 284: eccentric shaft portion
290: inverter unit
300: main bearing 302: first bushing part 304: second bushing part
310: compression unit
320: fixed scroll 322: fixed end plate portion 324: fixed wrap 326: shaft support portion
330: orbiting scroll 332: turning head plate portion 334: orbiting wrap 336: side groove
340: trust plate
350: anti-rotation unit 352: guide ring 356: guide pin
400, 401: guide pipe section 402: first pipe line 404: second pipe line 406,408: third pipe line
410: decompression unit 412: fixing guide 414: first protrusion 420: insert portion 422: insert body 424: second protrusion 426: head member
500: filter member
A: Decompression passage P: Compression chamber M: Intermediate pressure region

Claims (15)

Orbiting scroll connected to the drive shaft of the motor for supplying rotational power;
a fixed scroll engaged with the orbiting scroll to form a compression chamber;
a rear housing installed at a position facing the fixed scroll and discharging the refrigerant discharged through the fixed scroll to the outside;
a guide pipe section for guiding the oil inside the rear housing to the inside of the fixed scroll; and
It is installed in the guide pipe section, and includes a decompression unit for lowering the pressure of the oil moving along the guide pipe section;
The decompression unit may include a fixed guide unit having a first protrusion helically protruding inside the guide pipe unit; and
and an insert having a second protrusion engaged with the first protrusion and fastened to the fixed guide, and forming a pressure reducing passage through which a refrigerant moves between the first protrusion and the second protrusion.
According to claim 1,
The first protrusion has a thread shape protruding helically from the inside of the guide pipe, and the second protrusion has a thread shape protruding helically along an outer periphery of the insert part to engage the first protrusion.
3. The method of claim 2,
A cross-section of the first protrusion is a scroll compressor having a cross-sectional shape of a truncated cone.
According to claim 1,
The decompression passage is formed in a spiral shape along an outer circumference of the insert portion.
According to claim 1,
The insert portion is inserted into the fixing guide portion, the insert body is provided with the second protrusion on the outside; and
and a head member connected to an end of the insert body and having a cross-sectional area larger than that of the insert body.
According to claim 1,
and a filter member positioned inside the fixed guide unit facing the insert unit and filtering foreign substances contained in the oil moving along the fixed guide unit.
Orbiting scroll connected to the drive shaft of the motor for supplying rotational power;
a fixed scroll supporting the drive shaft and engaging with the orbiting scroll to form a compression chamber;
a rear housing installed consecutively to the orbiting scroll and discharging the refrigerant discharged through the orbiting scroll to the outside;
a guide pipe part for forming a pipe for guiding the oil inside the rear housing in a direction toward the orbiting scroll; and
It is installed in the guide pipe section, and includes a decompression unit for lowering the pressure of the oil moving along the guide pipe section;
The decompression unit may include a fixed guide unit having a first protrusion helically protruding inside the guide pipe unit; and
and an insert having a second protrusion engaged with the first protrusion and fastened to the fixed guide, and forming a pressure reducing passage through which a refrigerant moves between the first protrusion and the second protrusion.
8. The method of claim 7,
The guide pipe part may include: a first pipe pipe communicating with an oil storage part provided inside the rear housing;
a second conduit connected to the first conduit, having the insert part installed therein, and having a larger diameter than the first conduit; and
and a third conduit branched from the second conduit, communicating with the outside of the rear housing, and guiding the discharge of oil moving along the decompression path.
9. The method of claim 8,
The third conduit has one end connected to the second conduit and the other end extending in an inclined direction from the second conduit to be connected to a side surface of the rear housing facing the orbiting scroll.
9. The method of claim 8,
The third conduit forms a groove on a side surface of the rear housing facing the orbiting scroll and is connected to the second conduit.
8. The method of claim 7,
The first protrusion has a thread shape protruding helically from the inside of the guide pipe, and the second protrusion has a thread shape protruding helically along an outer periphery of the insert part to engage the first protrusion.
12. The method of claim 11,
A cross-section of the first protrusion is a scroll compressor having a cross-sectional shape of a truncated cone.
8. The method of claim 7,
The decompression passage is formed in a spiral shape along an outer circumference of the insert portion.
8. The method of claim 7,
The insert portion is inserted into the fixing guide portion, the insert body is provided with the second protrusion on the outside; and
and a head member connected to an end of the insert body and having a cross-sectional area larger than that of the insert body.
8. The method of claim 7,
and a filter member positioned inside the fixed guide unit facing the insert unit and filtering foreign substances contained in the oil moving along the fixed guide unit.

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