KR102611336B1 - Scroll Compressor - Google Patents

Abstract

The present invention includes a casing whose internal space is sealed; a driving unit including a stator fixed to the internal space and a rotor rotated inside the stator; a rotating shaft rotatably coupled to the rotor; a compression unit including an orbiting scroll installed to be capable of orbiting on the rotation shaft and a fixed scroll coupled to the orbiting scroll to form a compression chamber between the orbiting scrolls; and a refrigerant suction pipe coupled to the casing to enable supply of refrigerant to the compression chamber, wherein the refrigerant suction pipe has a foreign matter inflow prevention structure installed therein to filter out foreign matter flowing in with the refrigerant, the foreign matter The inflow prevention structure includes a foreign material blocking portion including a mesh portion that prevents the downward flow of foreign materials, and a coupling end that is formed to be bent at one end of the mesh portion; and a coupling accommodating part that is open at the top to accommodate the coupling end, and provides a scroll compressor including a fixing part fixedly installed inside the refrigerant suction pipe.

Description

Scroll Compressor

The present invention relates to a scroll compressor, and more specifically, to a scroll compressor having a mesh structure that can block suction foreign substances and improve reliability.

Generally, compressors are applied to vapor compression refrigeration cycles (hereinafter abbreviated as refrigeration cycles) such as refrigerators or air conditioners. Compressors can be classified into reciprocating, rotary, scroll, etc. depending on the method of compressing the refrigerant.

A reciprocating compressor is a compressor in which a piston in a cylinder compresses gas through a reciprocating motion. Among these, a scroll compressor engages a rotating scroll with a fixed scroll fixed in the inner space of a sealed container to perform a rotating movement, thereby forming a fixed wrap around the fixed scroll and the orbiting scroll. It is a compressor in which a compression chamber is formed between the rotating wraps.

In a scroll compressor, an orbiting scroll and a fixed scroll are interlocked and combined, and the orbiting scroll rotates relative to the fixed scroll to form a pair of compression chambers.

The compression chamber consists of a suction pressure chamber formed on the outside, an intermediate pressure chamber formed continuously with the volume gradually decreasing from the suction pressure chamber toward the center, and a discharge pressure chamber connected to the center of the intermediate pressure chamber. Generally, the suction pressure chamber is formed by penetrating the side of the fixed scroll, the intermediate pressure chamber is sealed, and the discharge pressure chamber is formed by penetrating the head plate portion of the fixed scroll.

Scroll compressors can be divided into low-pressure and high-pressure types depending on the path through which the refrigerant is sucked. In the low-pressure type, the refrigerant suction pipe is connected to the inner space of the casing, so that the low-temperature suction refrigerant passes through the inner space of the casing and then guided to the suction pressure chamber. In the high-pressure type, the refrigerant suction pipe is directly connected to the suction pressure chamber, so that the refrigerant flows into the inner space of the casing. This method is guided directly to the suction pressure chamber without passing through.

Patent Document 1 includes fixed scrolls and orbiting scrolls that interlock with each other to form a plurality of compression chambers so that refrigerant gas can be compressed, and refrigerant gas and oil inside the compressor so that refrigerant gas is supplied to the compression chambers of the fixed scroll and orbiting scroll. A suction pipe for sucking in the mixed fluid, a suction baffle installed on the outlet side of the suction pipe to separate some of the oil from the mixed fluid so that the mixed fluid can collide when the mixed fluid is sucked, an outlet of the suction pipe, and An oil discharge reduction device for a scroll compressor is disclosed, which is installed between suction baffles and includes an auxiliary separation means that effectively separates oil from refrigerant gas by using the difference in physical properties between the refrigerant gas and oil.

In the scroll compressor of Patent Document 1, when foreign matter accumulates on the mesh above a certain level or clogging occurs at the front end of the mesh due to moisture condensation due to moisture inflow, mesh damage and separation occur due to the pressure generated on the mesh, which causes the compressor Reliability problems arise.

That is, Patent Document 1 discloses a method for guiding oil from the sucked refrigerant and oil into the oil storage space at the bottom of the compressor using a mesh in an air conditioning scroll compressor to reduce compressor oil discharge.

Additionally, Patent Document 1 discloses an auxiliary separation means for separating oil from refrigerant gas by utilizing the difference in physical properties between the refrigerant gas and oil.

However, in Patent Document 1, there was a problem with foreign substances flowing in through the intake port.

In addition, when installing a mesh in the suction pipe to prevent the inflow of foreign substances, there was a problem that the mesh could not withstand its own weight and fell off due to the accumulation of foreign substances and flowed into the compression section, damaging the compression section.

In this way, there was a problem that the efficiency and reliability of the scroll compressor were reduced.

Therefore, there is a need to develop a structure that can prevent the mesh from coming off or falling off while preventing the inflow of foreign substances.

Published Patent Publication No. 10-2000-0051153 (2000.08.16)

The present invention was devised to solve the above problems, and the first object of the present invention is to provide a compressor with a structure that can increase fixing force or support force when using mesh to block foreign substances.

The second object of the present invention is to provide a scroll compressor with a structure that can minimize damage to the compression section caused by foreign substances in order to improve the reliability of the compression section manufactured through precision processing.

The third object of the present invention is to provide a mesh installation and fixing structure to block the inflow of foreign substances into the intake port.

The fourth object of the present invention is to provide a structure that can prevent mesh that has broken away from the mesh from flowing into the compression section.

In order to solve the above problems, the scroll compressor of the present invention includes a casing whose internal space is sealed; a driving unit including a stator fixed to the internal space and a rotor rotated inside the stator; a rotating shaft rotatably coupled to the rotor; a compression unit including an orbiting scroll installed to be capable of orbiting on the rotation shaft and a fixed scroll coupled to the orbiting scroll to form a compression chamber between the orbiting scrolls; and a refrigerant suction pipe coupled to the casing to enable supply of refrigerant to the compression chamber, wherein the refrigerant suction pipe has a foreign matter inflow prevention structure installed therein to filter out foreign matter flowing in with the refrigerant, the foreign matter The inflow prevention structure includes a foreign material blocking portion including a mesh portion that prevents the downward flow of foreign materials, and a coupling end that is formed to be bent at one end of the mesh portion; and a coupling accommodating part that is open at the top to accommodate the coupling end, and includes a fixing part fixedly installed inside the refrigerant suction pipe.

For this reason, the scroll compressor of the present invention has a structure that combines a foreign matter blocking portion including a mesh portion and a coupling end with an open top to receive and couple the coupling end, thereby improving the fixing force and support force with which the mesh portion is fixed to the fixing portion. It will happen.

Preferably, the upper side of the fixing part may be open and the other side may be curved.

The upper part of the fixing part is open, and the fixing force and support force are improved by the structure that accommodates the coupling end.

The refrigerant suction pipe is disposed to be spaced apart from the bottom of the foreign matter inflow prevention structure, and further includes a support member that supports the mesh portion and blocks the mesh portion from flowing into the compression section when the mesh portion separates from the fixing portion. can do.

Because of this, when the mesh part is separated from the fixing part, the support member can support the mesh part and block the mesh part from flowing into the compression part.

The support member includes a support ring coupled to the inner circumference of the refrigerant suction pipe; And it may include a plurality of cross support parts provided on the support ring to cross each other and supporting the separated mesh part.

The support member includes a support ring and a cross support portion, and has a flow path through which the refrigerant passes. At the same time, when the mesh portion is separated, it can support the mesh portion and block the mesh portion from flowing into the compression section.

The support ring may have a protrusion that protrudes in a radial direction, and the refrigerant suction pipe may have a groove portion that is concave to accommodate the protrusion in a coupling manner.

By forming the support ring to have a protrusion and a groove, the support member can be firmly fixed and supported on the inner periphery of the refrigerant suction pipe.

The support member may be formed to have a predetermined thickness and may have a plurality of polygonal structures connected to each other.

In this way, the support member forms a honeycomb structure and can more stably support the mesh that is separated.

For example, the coupling end may be disposed on the inner periphery of the fixing part to face the inside of the foreign matter inflow prevention structure.

If the coupling end is arranged to contact the outer periphery of the fixing part, the fixing part interferes with coupling to the inner circumference of the suction pipe, so the coupling end is disposed on the inner circumference of the fixing part and does not interfere, and can be coupled to the refrigerant suction pipe.

Preferably, the mesh portion may have a narrower width from top to bottom.

In order to solve another of the above problems, the scroll compressor of the present invention includes a casing whose internal space is sealed; a driving unit including a stator fixed to the internal space and a rotor rotated inside the stator; a rotating shaft rotatably coupled to the rotor; a compression unit including an orbiting scroll installed to be capable of orbiting on the rotation shaft and a fixed scroll coupled to the orbiting scroll to form a compression chamber between the orbiting scrolls; and a refrigerant suction pipe coupled to the casing to enable supply of refrigerant to the compression chamber, wherein the refrigerant suction pipe has a foreign matter inflow prevention structure installed therein to filter out foreign matter flowing in with the refrigerant, the foreign matter The inflow prevention structure includes an inclined portion formed to slope inward from the top; and a laminated portion provided to be flat at the bottom of the inclined portion and including a mesh portion.

The inclined portion may be formed in the shape of a polygonal structure, and the interior of the polygonal structure of the inclined portion may be filled with a mesh portion.

Additionally, the laminated portion may be formed in the shape of a polygonal structure, and the interior of the polygonal structure of the laminated portion may be filled with a mesh portion.

For this reason, as the foreign matter inflow prevention structure is formed of the inclined portion and the laminated portion, the foreign matter moves along the inclined portion and is deposited on the laminated portion. In addition, because foreign substances are mainly piled on the stacked portion due to the inclined portion, the entire passage is prevented from being blocked by foreign materials, and even if the stacked portion is blocked by foreign substances, the refrigerant can flow through the inclined portion, so the passage through which the refrigerant flows is can be secured.

The scroll compressor of the present invention can increase the fixation force or support force by applying a top fixation method by bending it opposite to the flow direction of the refrigerant or oil.

In addition, the scroll compressor of the present invention has a structure that combines a foreign matter blocking portion including a mesh portion and a coupling end with an open top to receive and couple the coupling end, so that the fixing force and support force of the mesh portion being fixed to the fixing portion are improved. do.

In addition, in the scroll compressor of the present invention, as the foreign matter inflow prevention structure is formed of an inclined portion and a stacked portion, foreign materials move along the inclined portion and are stacked on the stacked portion. In addition, because foreign substances are mainly piled on the stacked portion due to the inclined portion, the entire passage is prevented from being blocked by foreign materials, and even if the stacked portion is blocked by foreign substances, the refrigerant can flow through the inclined portion, so the passage through which the refrigerant flows is can be secured.

1 is a cross-sectional view showing a scroll compressor of the present invention.
Figure 2 is an exploded perspective view of the configuration of some of the scroll compressors of the present invention.
Figure 3 is a perspective view showing an example of the structure for preventing foreign matter from entering the present invention.
Figure 4 is a cross-sectional view showing the coupling end and the fixing part of the foreign matter blocking part.
Figure 5 is a perspective view showing a structure in which a foreign matter blocking unit and a support member are installed in a refrigerant suction pipe.
Figure 6 is a cross-sectional view taken along line A-A' of Figure 5.
Figure 7 is a perspective view showing a structure in which a support member is installed in a refrigerant suction pipe using different coupling methods.
Figure 8 is a cross-sectional view taken along line B-B' in Figure 7.
Figure 9 is a perspective view showing a structure in which a support member in the shape of a polygonal structure is installed in a refrigerant suction pipe.
Figure 10 is a cross-sectional view taken along line C-C' of Figure 9.
Figure 11 is a perspective view showing another example of the structure for preventing foreign matter from entering the present invention.

Hereinafter, the scroll compressor 10 related to the present invention will be described in more detail with reference to the drawings.

In this specification, the same or similar reference numbers are assigned to the same or similar components even in different embodiments, and duplicate descriptions thereof are omitted.

In addition, even if the embodiments are different from each other, the structure applied to one embodiment may be equally applied to another embodiment as long as there is no structural or functional contradiction.

Singular expressions include plural expressions unless the context clearly dictates otherwise.

In describing the embodiments disclosed in this specification, if it is determined that detailed descriptions of related known technologies may obscure the gist of the embodiments disclosed in this specification, the detailed descriptions will be omitted.

The attached drawings are only for easy understanding of the embodiments disclosed in this specification, and the technical idea disclosed in this specification is not limited by the attached drawings, and all changes, equivalents, and changes included in the spirit and technical scope of the present invention are not limited. It should be understood to include water or substitutes.

The scroll compressor 10 of the present invention may be a scroll compressor 10 for air conditioning.

In addition, as will be described later, in the scroll compressor 10 of the present invention, refrigerant flows in through the suction part, and the compressed refrigerant is discharged through the discharge port through a process of compressing the refrigerant in the compression part.

In the present invention, in order to improve the reliability of the compression section manufactured by precision processing, a foreign material inflow prevention structure 51 is installed at the front of the suction section where the refrigerant is sucked to prevent foreign material from entering, and damage to the compression section due to foreign material is provided. minimize.

The present invention can improve the existing manufacturing method and increase the reliability of the compressor through additional structures.

The scroll compressor 10 of the present invention includes a casing whose internal space is sealed; a driving unit including a stator fixed to the internal space and a rotor rotated inside the stator; a rotating shaft rotatably coupled to the rotor; a compression unit including an orbiting scroll installed to be capable of orbiting on the rotation shaft and a fixed scroll coupled to the orbiting scroll to form a compression chamber between the orbiting scrolls; and a suction pipe coupled to the casing to enable provision of refrigerant to the compression chamber.

Additionally, the suction pipe is provided with a foreign matter inflow prevention structure 51 installed inside the suction pipe to filter out foreign matter flowing in with the refrigerant.

The foreign matter inflow prevention structure 51 includes a foreign matter blocking portion 52 and a fixing portion 53.

The foreign matter blocking portion 52 includes a mesh portion 52a that prevents foreign materials from flowing downward, and a coupling end 52b that is bent at one end of the mesh portion 52a.

In addition, the fixing part 53 is open at the top and has a coupling receiving part for accommodating the coupling end 52b, and is fixedly installed inside the refrigerant suction pipe 50.

Due to the structure of the foreign matter blocking portion 52 having the mesh portion 52a and the coupling end 52b and the upper part being open to receive and couple the coupling end 52b, the mesh portion 52a is a fixed part. The fixation force and support force fixed to (53) are improved.

The structure in which the foreign matter blocking part 52, which has a mesh part 52a and a coupling end 52b, and the fixing part 53 are opened to receive and couple the coupling end 52b, is understood as a top fixing method. It can be.

The mesh portion 52a may form the side and bottom surfaces of the foreign matter inflow prevention structure 51 to prevent the downward flow of foreign matter.

Additionally, the mesh portion 52a may be 30 to 100 mesh (within 1 inch ² ), with 30 to 100 fine mesh portions 52a per inch ² .

The coupling end portion 52b is formed to be bent at one end of the mesh portion 52a.

For example, the coupling end 52b may be formed to be bent at the upper end of the mesh portion 52a in FIG. 4 .

Additionally, the coupling end 52b may be disposed on the inner periphery of the fixing part 53 to face the inside of the foreign matter inflow prevention structure 51.

If the coupling end (52b) is arranged to contact the outer periphery of the fixing part 53, the fixing part 53 interferes with the coupling to the inner circumference of the refrigerant suction pipe 50, so that it contacts the inner circumference of the fixing part 53. It is desirable to place

In the conventional structure, the mesh part 52a was simply fitted to the lower end of the fixing part 53, so the fixing force and support force were weak, and foreign substances accumulated in the mesh part 52a, causing the mesh part ( 52a) had a problem of not being able to withstand its own weight and falling off.

However, in the present invention, the mesh portion (52b) is bent at the upper end of the mesh portion (52a), and the coupling end (52b) is disposed on the inner periphery of the fixing portion (53). The fixing force and support force of 52a) being fixed to the fixing part 53 are improved and are tightly coupled.

Additionally, in the past, a ring for fixing was fixed to the upper part of the mesh portion 52a by pressing it using a press method. In the existing structure, the mesh portion 52a had a problem of being separated under a load of about 220 N to 250 N.

In addition, as a result of CFD analysis in a foreign matter blockage situation, it was measured that a load of approximately 226 N was applied.

Accordingly, in the present invention, the fixing portion 53 of the foreign material blocking portion 52 is required to have a fixing force of a certain amount or more to prevent the foreign material blocking portion 52 from coming off.

In the present invention, it is preferable that the foreign matter blocking portion 52 has a structure having a fixing force of 300N or more.

In the present invention, the coupling end 52b may be formed to be bent at least once.

The coupling end 52b may be shaped like a hook.

Referring to FIG. 4, an example is shown in which the coupling end 52b is formed in a hook shape bent once to the right, and the fixing ring 53a is formed such that the coupling receiving portion is opened upward.

The foreign matter blocking portion 52 may form the sides and bottom of the foreign matter inflow prevention structure 51 .

The foreign matter blocking portion 52 may be configured to include, for example, a mesh portion 52a.

Refrigerant flows into the suction part from the top and flows downward into the compression part of the scroll compressor 10. The refrigerant may also contain foreign substances.

As the refrigerant passes through the foreign matter blocking unit 52, foreign matter is filtered out. Additionally, the refrigerant may also include oil.

Referring to FIG. 3, an example in which the foreign matter blocking unit 52 is configured to include a mesh portion 52a is shown. Additionally, as shown in FIG. 3, the mesh portion 52a forms a side portion of the foreign matter inflow prevention structure 51 and is formed to have a narrower width from the top to the bottom.

The fixing part 53 is open at the top and has a coupling receiving part for accommodating the coupling end 52b, and may be fixedly installed inside the refrigerant suction pipe 50.

A coupling end 52b may be provided on the upper side of the foreign matter blocking portion 52.

In addition, the foreign matter inflow prevention structure 51 is open at the top and has a coupling receiving part for accommodating the coupling end 52b, and includes a fixing part 53 fixed to the inside of the refrigerant suction pipe 50. do.

The fixing part 53 may have an open upper side and a curved surface on the other side. That is, the fixing part 53 may be a half ring with an open upper side that accommodates the coupling end 52b so that it is coupled, that is, a fixing ring 53a with half of it open.

The refrigerant suction pipe 50 may further include support members 55 and 56.

The support members 55 and 56 are arranged to be spaced apart from the bottom of the foreign matter inflow prevention structure 51.

Due to this, when the mesh portion 52a is separated from the fixing portion 53, the support members 55 and 56 support the mesh portion 52a to prevent the mesh portion 52a from flowing into the compressed portion. You can block it.

In the case of the existing structure, the support members 55 and 56 were not separately provided, so when the mesh part 52a was separated from the fixing part 53, it could flow into the compression part, and the mesh part 52a flowing into the compression part ) damaged the fixed scroll and other components of the compression section, reducing compression efficiency.

In the present invention, the support members 55 and 56 may be implemented in an embodiment in which the support members 55 and 56 are formed in a ring shape with an internal flow path and a cross support portion 55b, or in another embodiment in the shape of a polygonal structure 56a. there is.

In one embodiment, the ring-shaped support member 55 is provided, for example, to cross each other on a support ring 55a coupled to the inner periphery of the refrigerant suction pipe 50 and the support ring 55a, and the separated mesh portion ( It may include a plurality of cross supports (55b) supporting 52a).

Referring to FIG. 6, the support member 55 is provided to cross each other and a support ring 55a coupled to the inner periphery of the refrigerant suction pipe 50 and the support ring 55a to separate the separated mesh portion 52a. An example including a plurality of supporting cross support portions 55b is shown.

The support ring 55a may include a protrusion 55a-1, and the protrusion 55a-1 is formed to protrude in the radial direction. Additionally, a groove portion 50a into which the protrusion 55a-1 is coupled may be formed in the refrigerant suction pipe 50.

The protrusion 55a-1 and the groove 50a are preferably formed in shapes that match each other. Additionally, the protrusion 55a-1 and the groove 50a may each be formed in plural numbers.

As shown in FIGS. 7 and 8, a protrusion 55a-1 is provided that protrudes in the radial direction from the outer periphery of the support ring 55a, and a groove 50a is formed concavely in the refrigerant suction pipe 50 to form a protrusion (55a-1). 55a-1) is combinably accepted.

In addition, an example is shown in which six protrusions 55a-1 are formed to be spaced apart from each other along the circumferential direction of the support ring 55a. In addition, FIG. 8 shows an example in which six grooves 50a are formed on the inner periphery of the refrigerant suction pipe 50 so that each protrusion 55a-1 is inserted.

Because of this, the support member 55 is coupled to the inner circumference of the refrigerant suction pipe 50. The support member 55 must have sufficient rigidity itself to support the separated mesh portion 52a and must be firmly fixed to the inner circumference of the refrigerant suction pipe 50.

In addition, the support member 55 must be provided with a passage through which the refrigerant can flow, and the passage must be formed to have sufficient space to minimize flow resistance or suction pressure drop.

Meanwhile, the support member 55 may be press-fitted to the inner circumference of the refrigerant suction pipe 50 without the protrusion 55a-1.

Referring to FIGS. 9 and 10 , another example of a support member 56 installed in the refrigerant suction pipe 50 is shown.

Another example of the support member 56 may be formed in the shape of a polygonal structure 56a.

As shown in FIG. 9, the support member 56 of the polygonal structure 56a of the present invention is formed to have a predetermined thickness in the vertical direction.

In addition, the support member 56 of the polygonal structure 56a of the present invention is formed in a form in which a plurality of polygonal structures are connected to each other.

Figure 8 shows an example in which the support member 56 is a hexagonal structure connected to each other.

The support member 56 includes a plurality of structures 56a, a fixing part 56b provided on the outer periphery of the structure 56a and coupled to the inner periphery of the refrigerant suction pipe 50, and a plurality of structures 56a connected to each other. A connection portion 56c may be provided.

The structure 56a forms a polygonal structure. 9 and 10 show an example in which a hexagonal structure 56a is formed, but it is not necessarily limited to a hexagon, and may also be formed in a polygon such as an octagon or a dodecagon.

The fixing portion 56b is provided on the outer periphery of the structure 56a. Referring to FIG. 10, an example is shown in which the fixing part 56b is provided at the outer edge of the structure 56a and is inserted into the inner circumference of the refrigerant suction pipe 50.

The connection portion 56c is provided on the surface where the plurality of structures 56a contact each other.

For this reason, the support member 56 of the polygonal structure 56a can be press-fitted to the inner circumference of the refrigerant suction pipe 50. The support member 56 of the polygonal structure 56a, like the ring structure support member 55, must have sufficient rigidity itself to support the separated mesh portion 52a, and the support member 56 of the refrigerant suction pipe 50 It must be firmly fixed to the inner circumference.

In addition, the support member 56 of the polygonal structure 56a includes a flow path through which the refrigerant flows in each structure 56a. The flow path of the polygonal structure 56a must be formed to have sufficient space to minimize flow resistance or suction pressure drop.

Figure 11 is a perspective view showing another example of the foreign matter inflow prevention structure 51 of the present invention.

Referring to FIG. 11, the foreign matter inflow prevention structure 51 is formed to include a polygonal structure 251a.

The polygonal structure 251a may have heights in the vertical direction in FIG. 11 .

Additionally, the foreign matter inflow prevention structure 51 may include an inclined portion 252 and a stacked portion 253.

The inclined portion 252 may be formed to be inclined inward from the top of the foreign matter inflow prevention structure 51 .

The inclined portion 252 may be formed in the shape of a polygonal structure 251a. Additionally, as an example, the interior of the polygonal structure may be filled with mesh portions 52a.

Additionally, the stacked portion 253 may be provided to be flat at the bottom of the inclined portion 252. The stacked portion 253 may also be formed in the shape of a polygonal structure 251a. Additionally, the interior of the polygonal structure 251a may be filled with a mesh portion 52a.

As the foreign matter inflow prevention structure 51 is formed of the inclined portion 252 and the stacked portion 253, foreign materials move along the inclined portion 252 and are stacked on the stacked portion 253. In addition, foreign substances are mainly piled on the stacked portion 253 due to the inclined portion 252, thereby preventing the entire passage from being blocked by foreign substances, and even if the stacked portion 253 is blocked by foreign substances, the refrigerant flows through the inclined portion. Therefore, a flow path for the refrigerant can be secured.

Hereinafter, with reference to FIGS. 1 and 2, the structure of the scroll compressor 10 of the present invention will be described.

The scroll compressor 10 of the present invention may be a through-axis scroll compressor 10 in which the rotating shaft 125 is disposed to penetrate the orbiting scroll 150 and the fixed scroll 140. As shown in FIG. 1, it can be understood as a “through-axis scroll compressor 10” in which the rotating shaft 125 is disposed to penetrate the compression unit including the orbiting scroll 150 and the fixed scroll 140.

On the other hand, as shown in FIG. 1, the scroll compressor 10 of the present invention is a bottom compression type scroll compressor 10, and the bottom compression type scroll compressor 10 is mainly described, but it is necessarily It is not limited to this.

That is, if the scroll compressor 10 of the present invention is a through-axis scroll compressor 10, it can also be applied to a top compression type scroll compressor 10 in which the compression unit is disposed above the transmission unit 120.

In addition, in the following description, the lower compression type scroll compressor 10, which is a vertical scroll compressor 10 in which the transmission unit 120 and the compression unit are arranged in the vertical axial direction, and the compression unit is located lower than the transmission unit 120, is taken as an example. Explain.

In addition, as an example, a high-pressure scroll compressor 10 in which the refrigerant refrigerant suction pipe 50, which is a lower compression type and forms a suction passage, is directly connected to the compression unit, and the refrigerant discharge pipe 116 communicates with the internal space of the casing 110, is used as an example. Listen and explain.

However, the scroll compressor 10 of the present application is not necessarily limited to the lower compression type, and can also be applied to the upper compression type in which the compression unit is disposed above the driving unit 120.

The scroll compressor 10 of the present invention may be an inverter scroll compressor 10. Additionally, the scroll compressor 10 of the present invention can be operated from low speed to high speed. Additionally, the scroll compressor 10 of the present invention may be a high pressure type and a bottom compression type.

Figure 1 shows a lower compression type scroll compressor 10. As shown in Figure 1, the scroll compressor 10 according to this embodiment forms a drive motor in the internal space 1a of the casing 110. A lower compression type in which a transmission unit 120 that generates rotational force is installed on the upper part of the casing 110, and a compression unit that receives the rotational force of the transmission unit 120 and compresses the refrigerant is installed on the lower side of the transmission unit 120. It can be understood as a scroll compressor 10.

The casing 110 has an oil storage space (S11). For example, the electric motor 120 may be installed on the upper part of the casing 110, and the main frame 130, the orbiting scroll 150, the fixed scroll 140, and the discharge cover are located on the lower side of the electric motor 120. (160) can be installed sequentially.

The electric motor 120 receives electrical energy from the outside and converts it into mechanical energy.

In addition, the main frame 130, orbiting scroll 150, fixed scroll 140, and discharge cover 160 constitute a compression unit that receives mechanical energy generated by the transmission unit 120 and compresses the refrigerant.

Referring to FIG. 1, an example is shown in which the transmission unit 120 is coupled to the upper end of the rotation shaft 125, which will be described later, and the compression unit is coupled to the lower end of the rotation shaft 125. That is, the scroll compressor 10 of the present invention may have a bottom compression type structure.

In summary, the scroll compressor 10 includes a transmission unit 120 and a compression unit, and the transmission unit 120 and the compression unit are accommodated in the internal space 110a 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 may be formed in a cylindrical shape with both ends open.

The upper shell 112 may be coupled to the upper end of the cylindrical shell 111, and the lower shell 113 may be coupled to the lower end of the cylindrical shell 111.

That is, both upper and lower ends of the cylindrical shell 111 are combined and covered with the upper shell 112 and the lower shell 113, respectively, and the combined cylindrical shell 111, upper shell 112, and lower shell 113 forms the internal space 110a of the casing 110. At this time, the internal space 110a is sealed.

The internal space 110a of the sealed casing 110 is divided into a lower space (S1), an upper space (S2), an oil storage space (S11), and a discharge space (S3).

Based on the main frame 130, a lower space (S1) and an upper space (S2) are formed on the upper side, and an oil storage space (S11) and a discharge space (S3) are formed on the lower side.

The lower space (S1) refers to the space between the transmission unit 120 and the main frame 130, and the upper space (S2) refers to the space above the transmission unit 120. In addition, the oil storage space S11 refers to the space below the discharge cover 160, and the discharge space S3 refers to the space between the discharge cover 160 and the fixed scroll 140.

One end of the refrigerant inlet pipe 115 is penetrated and coupled to the side of the cylindrical shell 111. Specifically, one end of the refrigerant inlet pipe 115 is coupled through the cylindrical shell 111 in the radial direction of the cylindrical shell 111.

The refrigerant inlet pipe 115 passes through the cylindrical shell 111 and is directly coupled to an inlet (not shown) formed on the side of the fixed scroll 140. Accordingly, the refrigerant may flow into the compression chamber (V) through the refrigerant inlet pipe 115.

A refrigerant suction pipe 50 is coupled to one end and the other end of the refrigerant inlet pipe 115.

The refrigerant suction pipe 50 is connected to the outlet side of the evaporator through a refrigerant pipe. Accordingly, after the refrigerant moving from the evaporator to the refrigerant suction pipe 50 is separated from the liquid refrigerant in the refrigerant suction pipe 50, the gas refrigerant is directly sucked into the compression chamber (V) through the refrigerant inlet pipe 115. That is, the refrigerant suction pipe 50 may be an accumulator that separates liquid refrigerant from the introduced refrigerant.

In order to prevent the inflow of conventional foreign substances, when installing the mesh part 52a in the refrigerant suction pipe 50, as foreign substances accumulate, the mesh part 52a falls off without being able to withstand its own weight and flows into the compression unit, causing the compression unit to be compressed. There was a problem with damage.

In the present invention, a foreign matter inflow prevention structure 51 is provided in the refrigerant suction pipe 50, and the foreign matter inflow prevention structure 51 includes a mesh portion 52a that prevents the foreign matter from flowing downward, and the mesh A foreign matter blocking portion 52 having a coupling end 52b formed to be bent at one end of the portion 52a, and a coupling receiving portion open at the top to accommodate the coupling end 52b, It includes a fixing part 53 fixedly installed inside the refrigerant suction pipe 50.

For this reason, the scroll compressor 10 of the present invention has a structure in which a foreign matter blocking portion 52 having a mesh portion 52a and a coupling end 52b, and a structure in which the top is opened to accommodate and couple the coupling end 52b. As a result, the fixing force and support force with which the mesh portion 52a is fixed to the fixing portion 53 are improved.

The detailed configuration of the foreign matter inflow prevention structure 51 has already been described above.

A refrigerant discharge pipe 116 communicating with the internal space 110a of the casing 110 is coupled through the upper portion of the upper shell 112. Accordingly, the refrigerant discharged from the compression unit into the internal space 110a of the casing 110 is discharged to the condenser (not shown) through the refrigerant discharge pipe 116.

The fixed scroll 140 is installed inside the casing 110. On one side of the fixed scroll 140, an orbiting scroll 150 is disposed to be able to pivot. The fixed scroll 140 and the orbiting scroll 150 form a compression chamber (V).

In addition, a discharge cover 160 is installed on one side of the fixed scroll 140 and the other side opposite to the fixed scroll 140.

Meanwhile, the fixed scroll 140 is provided with a fixed wrap 144. The fixed scroll 140 may further include a sub-bearing hole 1431.

The fixed scroll 140 may include a fixed head plate 141, a fixed side wall 142, a sub-bearing 143, and a fixed wrap 144. The detailed structure of the fixed scroll 140 will be described later. Do this.

The orbiting scroll 150 rotates with respect to the fixed scroll 140 and engages with the fixed wrap 144 to form a compression chamber (V).

For example, the orbiting scroll 150 is connected at one end of the orbiting wrap 152, which engages with the fixed wrap of the fixed scroll 140 to form a compression chamber (V), and has a predetermined width. It may be provided with a orbiting mirror plate portion 151 formed of, and the detailed structure of the orbiting scroll 150 will be described later.

The rotation shaft 125 is disposed in one direction inside the casing 110 and is installed to penetrate through the inner periphery of the fixed scroll 140 and the orbiting scroll 150 to enable the orbiting scroll 150 to rotate. Rotational force can be transmitted.

The discharge cover 160 is coupled to the other side opposite to one side forming the compression chamber (V) of the fixed scroll 140. Additionally, the discharge cover 160 has a cover lower surface 1611 that forms the lower part of the discharge cover 160. It has a cover side 1612 that forms a side surface of the discharge cover 160.

A discharge hole 163 capable of communicating with the inside of the oil feeder 127 may be formed in the cover lower surface 1611.

The oil feeder 127 is coupled to the cover lower surface 1611 to face in the opposite direction to the fixed scroll 140, and is formed to communicate with the oil storage space S11.

Referring to FIG. 1, the high-pressure and bottom compression type scroll compressor 10 according to this embodiment has a transmission unit 120 forming the transmission unit 120 installed in the upper half of the casing 110, and a transmission unit ( 120), the main frame 130, the fixed scroll 140, the orbiting scroll 150, and the discharge cover 160 are installed in order. Typically, the compression unit may include a main frame 130, a fixed scroll 140, an orbiting scroll 150, and a discharge cover 160.

The transmission unit 120 is coupled to the upper end of the rotating shaft 125, which will be described later, and the compression unit is coupled to the lower end of the rotating shaft 125. Accordingly, the compressor has the lower compression structure described above, and the compression unit is connected to the electric drive unit 120 by the rotation shaft 125 and operates by the rotational force of the electric drive unit 120.

Referring to FIG. 1, the casing 110 according to this embodiment may include a cylindrical shell 111, an upper shell 112, and a lower shell 113. The cylindrical shell 111 may have a cylindrical shape with openings at both upper and lower ends, the upper shell 112 may be coupled to cover the open upper end of the cylindrical shell 111, and the lower shell 113 may be connected to the cylindrical shell 111. ) can be combined to cover the open bottom of the.

Accordingly, the internal space 110a of the casing 110 is sealed, and the internal space 110a of the sealed casing 110 is divided into a lower space (S1) and an upper space (S2) based on the transmission unit 120. separated.

The lower space (S1) is a space formed on the lower side of the transmission unit 120, and the lower space (S1) can be divided into an oil storage space (S11) and a discharge space (S12) based on the compression section.

The oil storage space (S11) is a space formed below the compression section and forms a space where mixed oil containing oil or liquid refrigerant is stored. The discharge space (S12) is a space formed between the upper surface of the compression unit and the lower surface of the transmission unit 120, and forms a space where the refrigerant compressed in the compression unit or a mixed refrigerant mixed with oil is discharged.

The upper space (S2) is a space formed on the upper side of the transmission unit 120, and forms an oil separation space where oil is separated from the refrigerant discharged from the compression unit. A refrigerant discharge pipe 116 communicates with the upper space S2.

The above-described transmission unit 120 and main frame 130 are inserted and fixed inside the cylindrical shell 111. An oil return passage (Po1) (Po2) spaced apart from the inner circumferential surface of the cylindrical shell 111 by a preset distance may be formed on the outer peripheral surface of the transmission unit 120 and the outer peripheral surface of the main frame 130. This will be explained later along with the oil recovery channel.

A refrigerant inlet pipe 115 penetrates and is coupled to the side of the cylindrical shell 111. Accordingly, the refrigerant inlet pipe 115 penetrates the cylindrical shell 111 forming the casing 110 in the radial direction and is coupled thereto.

The refrigerant inlet pipe 115 is formed in an L shape, and one end penetrates the cylindrical shell 111 and directly communicates with the suction port of the fixed scroll 140 forming the compression section. Accordingly, the refrigerant may flow into the compression chamber (V) through the refrigerant inlet pipe 115.

Additionally, the other end of the refrigerant inlet pipe 115 is connected to the refrigerant suction pipe 50 forming a suction passage outside the cylindrical shell 111. The refrigerant suction pipe 50 is connected to the outlet side of the evaporator (not shown) through a refrigerant pipe. Accordingly, the refrigerant moving from the evaporator to the refrigerant suction pipe 50 is separated from the liquid refrigerant in the refrigerant suction pipe 50, and then the gas refrigerant is directly sucked into the compression chamber (V) through the refrigerant inlet pipe 115.

A terminal bracket (not shown) is coupled to the upper half or upper shell 112 of the cylindrical shell 111, and a terminal (not shown) for transmitting external power to the electric power unit 120 may be coupled through the terminal bracket. .

At the top of the upper shell 112, the inner end of the refrigerant discharge pipe 116 is connected to the inner space 110a of the casing 110, specifically, the upper space S2 formed on the upper side of the transmission unit 120. It penetrates and joins.

The refrigerant discharge pipe 116 corresponds to a passage through which the compressed refrigerant discharged from the compression unit into the internal space 110a of the casing 110 is discharged to the outside toward the condenser (not shown). The refrigerant discharge pipe 116 may be arranged on the same axis as the rotation axis 125, which will be described later. Accordingly, the venturi tube disposed parallel to the refrigerant discharge pipe 116 may be disposed eccentrically with respect to the axial center of the rotation axis 125.

The refrigerant discharge pipe 116 is provided with a refrigerant suction pipe 50 that separates oil from the refrigerant discharged from the compressor 10 to the condenser, or blocks the refrigerant discharged from the compressor 10 from flowing back into the compressor 10. A check valve (not marked) may be installed.

Hereinafter, the transmission unit 120 will be described with reference to FIG. 1. The transmission unit 120 according to this embodiment includes a stator 121 and a rotor 122. The stator 121 is inserted and fixed to the inner peripheral surface of the cylindrical shell 111, and the rotor 122 is rotatably provided inside the stator 121.

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

The stator core 1211 is formed in an annular or hollow cylindrical shape and is fixed to the inner peripheral surface of the cylindrical shell 111 by hot pressing.

A rotor accommodating portion 1211a is formed in the central portion of the stator core 1211 through a circular shape into which the rotor 122 is rotatably inserted. On the outer peripheral surface of the stator core 1211, a plurality of stator-side oil return grooves 1211b, which are cut or recessed in a D-cut shape along the axial direction, may be formed at preset intervals along the circumferential direction.

On the inner peripheral surface of the rotor receiving portion 1211a, a plurality of teeth (not shown) and slots (not shown) are formed alternately along the circumferential direction, and a stator coil 1212 is wound around each tooth passing through both slots.

More precisely, a slot may be a space between circumferentially neighboring stator coils. In addition, the slot forms an internal passage (120a), a gap passage is formed between the inner peripheral surface of the stator core 1211 and the outer peripheral surface of the rotor core 1221, which will be described later, and the oil return groove (1211b) forms an external passage. do. The internal passage (120a) and the void passage form a passage through which the refrigerant discharged from the compression unit moves to the upper space (S2), and the external passage forms a passage through which the oil separated from the upper space (S2) is recovered into the oil storage space (S11). A first oil recovery passage (Po1) is formed.

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 penetrated and coupled to the casing 110. An insulator 1213, which is an insulating member, is inserted between the stator core 1211 and the stator coil 1212.

The insulator 1213 is provided on the outer and inner circumference sides to accommodate the bundle of the stator coil 1212 in the radial direction and may extend to both sides of the stator core 1211 in the axial direction.

The rotor 122 includes a rotor core 1221 and a permanent magnet 1222.

The rotor core 1221 is formed in a cylindrical shape and is accommodated in the rotor receiving portion 1211a formed at the center of the stator core 1211.

Specifically, the rotor core 1221 is rotatably inserted into the rotor receiving portion 1211a of the stator core 1211 at an interval equal to the preset gap 120a. The permanent magnets 1222 are embedded inside the rotor core 1221 at preset intervals along the circumferential direction.

A balance weight 123 may be coupled to the bottom of the rotor core 1221. However, the balance weight 123 may be coupled to the main shaft portion 1251 of the rotation shaft 125, which will be described later. This embodiment will be described focusing on an example in which the balance weight 123 is coupled to the lower end of the rotor core 1221.

In addition, the balance weight 123 is coupled to the lower end of the rotor core 1221 and rotates together with the rotation of the rotor 122.

A gas discharge hole 190 may be provided on the outer periphery of the balance weight 123 to relieve the lower pressure differential caused by the discharge hole 163 and to flow the refrigerant upward.

A rotation shaft 125 is coupled to the center of the rotor core 1221. The upper end of the rotating shaft 125 is press-fitted and coupled to the rotor 122, and the lower end of the rotating shaft 125 is rotatably inserted into the main frame 130 and supported in the radial direction.

The rotor 122 may be provided with an air gap or winding gap through which discharged refrigerant can flow.

The main frame 130 is provided with a main bearing 171 made of a bush bearing to support the first bearing portion 1252 of the rotating shaft 125. Accordingly, the lower part of the rotation shaft 125 inserted into the main frame 130 can rotate smoothly inside the main frame 130.

The rotation shaft 125 transmits the rotational force of the transmission unit 120 to the orbiting scroll 150 forming the compression unit. As a result, the orbiting scroll 150 eccentrically coupled to the rotation shaft 125 rotates with respect to the fixed scroll 140.

Referring to FIG. 2A, the rotation shaft 125 according to this embodiment includes a main shaft portion 1251, a first bearing portion 1252, a fixed bearing portion 1253, and an eccentric portion 1254.

The main shaft portion 1251 is an upper portion of the rotation shaft 125 and is formed in a cylindrical shape. The main shaft portion 1251 may be partially press-fitted and coupled to the rotor core 1221.

The first bearing portion 1252 is a portion extending from the bottom of the main shaft portion 1251. The first bearing portion 1252 may be inserted into the main bearing hole 133a of the main frame 130 and supported in the radial direction.

The fixed bearing portion 1253 refers to the lower portion of the rotating shaft 125. The fixed bearing portion 1253 may be inserted into the sub-bearing hole 1431 of the fixed scroll 140 and supported in the radial direction. The central axis of the fixed bearing unit 1253 and the central axis of the first bearing unit 1252 may be arranged on the same line. That is, the first bearing unit 1252 and the fixed bearing unit 1253 may have the same central axis.

Meanwhile, the eccentric portion 1254 is formed between the lower end of the first bearing portion 1252 and the upper end of the fixed bearing portion 1253. The eccentric portion 1254 may be inserted and coupled to the rotation shaft coupling portion 153 of the orbiting scroll 150.

The eccentric portion 1254 may be formed to be eccentric in the radial direction with respect to the first bearing portion 1252 and the fixed bearing portion 1253. That is, the central axis of the eccentric portion 1254 may be formed eccentrically with respect to the central axis of the first bearing portion 1252 and the central axis of the fixed bearing portion 1253. Accordingly, when the rotation shaft 125 rotates, the orbiting scroll 150 can rotate with respect to the fixed scroll 140.

Meanwhile, inside the rotating shaft 125, an oil supply passage 126 for supplying oil to the first bearing part 1252, the fixed bearing part 1253, and the eccentric part 1254 is formed in a hollow shape. The oil supply passage 126 includes an internal oil passage 1261 formed along the axial direction inside the rotating shaft 125.

As the compression part is located lower than the transmission part 120, the internal oil passage 1261 is approximately at the bottom or mid-height of the stator 121 from the bottom of the rotation shaft 125, or higher than the top of the first bearing part 1252. It can be formed by digging a groove up to the location. However, in an embodiment not shown, the internal oil passage 1261 may be formed to penetrate the rotation shaft 125 in the axial direction.

An oil pickup 127 for pumping the oil filled in the oil storage space S11 may be coupled to the lower end of the rotating shaft 125, that is, the lower end of the fixed bearing portion 1253. The oil pickup 127 includes an oil supply pipe 1271 that is inserted and coupled to the internal oil passage 1261 of the rotating shaft 125, and a blocking member 1272 that accommodates the oil supply pipe 1271 and blocks the intrusion of foreign substances. can do. The oil supply pipe 1271 may extend downward so as to penetrate the discharge cover 160 and be submerged in oil in the oil storage space (S11).

The rotating shaft 125 communicates with the internal oil passage 1261 and directs oil moving upward along the internal oil passage 1261 to the first bearing portion 1252, the fixed bearing portion 1253, and the eccentric portion 1254. A plurality of guiding oil supply holes may be formed.

Referring to FIG. 2, the compression unit according to this embodiment is shown as an example including a main frame 130, a fixed scroll 140, an orbiting scroll 150, and a discharge cover 160.

The main frame 130 is fixedly installed on the opposite side of the fixed scroll 140 with the orbiting scroll 150 in between. Additionally, the main frame 130 can accommodate the orbiting scroll 150 so that it can rotate.

Referring to Figures 1 and 2, the main frame 130 may include a frame head plate portion 131, a frame side wall portion 132, and a main bearing receiving portion 133.

The frame plate portion 131 is formed in an annular shape and is installed on the lower side of the transmission unit 120. The frame side wall portion 132 may extend in a cylindrical shape from the lower edge of the main frame 130. For example, the frame side wall portion 132 extends in a cylindrical shape from the lower edge of the frame end plate portion 131. do. In addition, 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 welding. Accordingly, the oil storage space (S11) and the discharge space (S12) forming the lower space (S1) of the casing (110) are separated by the frame head plate portion (131) and the frame side wall portion (132).

A second discharge hole 132a forming part of the discharge passage may be formed to penetrate the frame side wall portion 132 in the axial direction. The second discharge hole 132a is formed to correspond to the first discharge hole 142c of the fixed scroll 140, which will be described later, and forms a refrigerant discharge passage (not marked) together with the first discharge hole 142c.

As shown in FIG. 2, the second discharge holes 132a may be formed long in the circumferential direction, or a plurality of second discharge holes 132a may be formed at predetermined intervals along the circumferential direction. Accordingly, the second discharge hole (132a) secures the discharge area while maintaining the radial width to a minimum, thereby securing the volume of the compression chamber (V) compared to the same diameter of the main frame 130. The first discharge hole 142c, which is provided on the fixed scroll 140 and forms part of the discharge passage, may be formed in the same manner.

A discharge guide groove 132b that accommodates a plurality of second discharge holes 132a may be formed at the top of the second discharge hole 132a, that is, on the upper surface of the frame head plate portion 131. There may be at least one discharge guide groove (132b) depending on the formation position of the second discharge hole (132a). For example, when the second discharge holes (132a) are composed of three groups, the discharge guide grooves (132b) are formed into three discharge guide grooves (132b) to accommodate each of the second discharge holes (132a) in three groups. can be formed. The three discharge guide grooves 132b may be formed to be located on the same line in the circumferential direction.

The discharge guide groove 132b may be formed wider than the second discharge hole 132a. For example, the second discharge hole 132a may be formed on the same line in the circumferential direction as the first oil recovery groove 132c, which will be described later. Therefore, when the passage guide 190, which will be described later, is provided, it becomes difficult for the second discharge hole 132a, which has a small cross-sectional area, to be located inside the passage guide 190. Accordingly, a discharge guide groove (132b) is formed at the end of the second discharge hole (132a), and the inner circumference of the discharge guide groove (132b) may be radially extended to the inside of the flow guide 190.

Through this, the inner diameter of the second discharge hole (132a) is formed small, so that the second discharge hole (132a) is formed near the outer peripheral surface of the frame 130, and the second discharge hole (132a) is formed in the flow path by the flow guide 190. It can be prevented from being excluded from the outside of the guide 190, that is, toward the outer peripheral surface of the stator 121.

A first oil recovery groove (132c) forming part of the second oil return passage (Po2) is formed on the outer peripheral surface of the frame end plate portion 131 forming the outer peripheral surface of the main frame 130 and the outer peripheral surface of the frame side wall portion 132 in the axial direction. It can be formed by penetrating. Only one first oil recovery groove 132c may be formed, or may be formed at predetermined intervals in the circumferential direction along the outer peripheral surface of the main frame 130. Accordingly, the discharge space (S12) of the casing 110 communicates with the oil storage space (S11) of the casing 110 through the first oil return groove (132c).

The first oil recovery groove (132c) is formed to correspond to the second oil recovery groove (not shown) of the fixed scroll 140, which will be described later, and is formed as a second oil recovery passage along with the second oil recovery groove of the fixed scroll 140. is formed.

The main bearing receiving portion 133 protrudes upward toward the transmission portion 120 from the central upper surface of the frame plate portion 131. The main bearing receiving portion 133 is formed by penetrating a cylindrical main bearing hole 133a in the axial direction, and the first bearing portion 1252 of the rotating shaft 125 is inserted into the main bearing hole 133a to provide a radius. supported in one direction.

Hereinafter, the fixed scroll 140 will be described with reference to FIGS. 1 and 2. The fixed scroll 140 according to this embodiment includes a fixed head plate portion 141, a fixed side wall portion 142, and a sub-bearing portion ( 143) and a fixed wrap 144.

The fixed head plate portion 141 is formed in a disk shape with a plurality of concave portions formed on the outer peripheral surface, and a sub-bearing hole 1431 forming a sub-bearing portion 143, which will be described later, may be formed through the center in the vertical direction. Discharge holes 1411 and 1412 may be formed around the sub-bearing hole 1431, which communicate with the discharge pressure chamber Vd and discharge the compressed refrigerant into the discharge space S12 of the discharge cover 160, which will be described later.

Although not shown in the drawing, only one discharge port may be formed so as to communicate with both the first compression chamber (V1) and the second compression chamber (V2), which will be described later. However, as in the present embodiment, the first discharge port (not coded) may communicate with the first compression chamber (V1), and the second discharge port (not coded) may communicate with the second compression chamber (V2). Accordingly, the refrigerant compressed in the first compression chamber (V1) and the second compression chamber (V2) can be independently discharged through different discharge ports.

The fixed side wall portion 142 may extend in the vertical direction from the upper surface edge of the fixed head plate portion 141 to form a ring shape. The fixed side wall portion 142 may be coupled to the frame side wall portion 132 of the main frame 130 so as to face in the vertical direction.

A first discharge hole 142c is formed through the fixed side wall 142 in the axial direction. The first discharge holes 142c may be formed long in the circumferential direction, or may be formed in plural numbers at preset intervals along the circumferential direction. Accordingly, the first discharge hole (142c) secures the discharge area while maintaining the radial width to a minimum, thereby securing the volume of the compression chamber (V) compared to the same diameter of the fixed scroll (140).

The first discharge hole 142c communicates with the second discharge hole 132a described above while the fixed scroll 140 is coupled to the cylindrical shell 111. Accordingly, the first discharge hole 142c forms a refrigerant discharge passage together with the previously described second discharge hole 132a.

A second oil recovery groove may be formed on the outer peripheral surface of the fixed side wall portion 142. The second oil return groove is connected to the first oil return groove (132c) provided in the main frame 130, and guides the oil recovered through the first oil return groove (132c) to the oil storage space (S11). . Accordingly, the first oil recovery groove 132c and the second oil recovery groove form a second oil recovery passage Po2 together with the oil recovery groove 1612a of the discharge cover 160, which will be described later.

A suction port is formed in the fixed side wall portion 142 that penetrates the fixed side wall portion 142 in the radial direction. The end of the refrigerant inlet pipe 115 that penetrates the cylindrical shell 111 is inserted and coupled to the intake port. As a result, the refrigerant can flow into the compression chamber (V) through the refrigerant inlet pipe 115.

The sub-bearing portion 143 extends axially from the center of the fixed head plate portion 141 toward the discharge cover 160. At the center of the sub-bearing portion 143, a cylindrical sub-bearing hole 1431 is formed through the axial direction, and the fixed bearing portion 1253 of the rotating shaft 125 is inserted into the sub-bearing hole 1431 to rotate in the radial direction. It can be supported. Accordingly, the lower end of the rotating shaft 125 (or the fixed bearing portion 1253) is inserted into the sub-bearing portion 143 of the fixed scroll 140 and supported in the radial direction, and the eccentric portion 1254 of the rotating shaft 125 is It may be supported in the axial direction on the upper surface of the fixed head plate portion 141 forming the periphery of the sub-bearing portion 143.

The fixing wrap 144 may be formed to extend axially from the upper surface of the fixing head plate portion 141 toward the orbiting scroll 150. The fixed wrap 144 engages with the orbiting wrap 152, which will be described later, to form a compression chamber (V). The fixed wrap 144 will be described later along with the swing wrap 152.

Hereinafter, the orbiting scroll 150 will be described with reference to FIGS. 1 and 2. The orbiting scroll 150 according to this embodiment may include a pivoting plate portion 151, a pivoting wrap 152, and a rotating shaft engaging portion 153.

The pivoting plate portion 151 is formed in a disk shape and is accommodated in the main frame 130. The upper surface of the pivot plate portion 151 may be supported in the axial direction on the main frame 130 with a back pressure sealing member (not indicated) interposed therebetween.

The swing wrap 152 may be formed to extend from the lower surface of the pivot plate portion 151 toward the fixed scroll 140. The orbiting wrap 152 engages with the fixed wrap 144 to form a compression chamber (V).

The orbiting wrap 152 may be formed in an involute shape together with the fixed wrap 144. However, the orbiting wrap 152 and the fixed wrap 144 may be formed in various shapes other than the involute.

For example, the orbital wrap 152 has a shape in which a plurality of circular arcs with different diameters and origins are connected, and the outermost curve may be formed in an approximately elliptical shape with a major axis and a minor axis. The fixing wrap 144 may also be formed in the same way.

The inner end of the pivoting wrap 152 is formed in the central portion of the pivoting disk portion 151, and a rotation shaft engaging portion 153 may be formed through the central portion of the pivoting disk portion 151 in the axial direction.

The eccentric portion 1254 of the rotation shaft 125 is rotatably inserted and coupled to the rotation shaft coupling portion 153. Accordingly, the outer peripheral portion of the rotating shaft coupling portion 153 is connected to the orbital wrap 152 and serves to form a compression chamber (V) together with the fixed wrap 144 during the compression process.

The rotation shaft coupling portion 153 may be formed at a height that overlaps the orbital wrap 152 on the same plane. That is, the rotation shaft coupling portion 153 may be disposed at a height where the eccentric portion 1254 of the rotation shaft 125 overlaps the pivot wrap 152 on the same plane. Accordingly, the repulsion force and compression force of the refrigerant are applied to the same plane based on the orbiting plate portion 151 and cancel each other out, and through this, the tilt of the orbiting scroll 150 due to the action of the compression force and repulsion force can be suppressed. .

The rotation shaft coupling portion 153 may be provided with a coupling side portion (not shown) that contacts the outer circumference of the slewing bearing 173 and supports the slewing bearing 173.

In addition, the rotating shaft coupling portion 153 may further include a coupling end 52b (not shown) that contacts one end of the slewing bearing 173 and supports the slewing bearing 173.

A coupling side portion formed up and down on the inner circumference of the rotating shaft coupling portion 153 to contact the outer circumference of the slewing bearing 173 is shown, and a coupling end portion ( 52b) is shown.

Meanwhile, the compression chamber (V) is formed in a space consisting of a fixed head plate portion 141, a fixed wrap 144, and a pivoting head portion 151 and a pivot wrap 152. In addition, the compression chamber (V) includes a first compression chamber (V1) formed between the inner surface of the fixed wrap (144) and the outer surface of the orbiting wrap (152) with respect to the fixed wrap (144), and a fixed wrap ( It may be composed of a second compression chamber (V2) formed between the outer surface of the 144) and the inner surface of the turning wrap 152.

The scroll compressor 10 according to the present embodiment as described above operates as follows.

That is, when power is applied to the drive motor 120, a rotational force is generated in the rotor 122 and the rotation shaft 125 to rotate, and the orbiting scroll 150 eccentrically coupled to the rotation shaft 125 rotates the Oldham ring 180. A turning movement is performed with respect to the fixed scroll 140.

Then, the volume of the compression chamber (V) increases from the suction pressure chamber (Vs) formed on the outside of the compression chamber (V) to the intermediate pressure chamber (Vm) formed continuously toward the center, and to the discharge pressure chamber (Vd) in the center. gradually decreases.

Then, the refrigerant moves to the condenser (not shown), the expander (not shown), and the evaporator (not shown) of the refrigeration cycle, and then moves to the refrigerant suction pipe 50, and this refrigerant flows through the refrigerant inlet pipe 115. It moves toward the suction pressure chamber (Vs), which forms the compression chamber (V).

Then, the refrigerant sucked into the suction pressure chamber (Vs) is compressed as it moves through the intermediate pressure chamber (Vm) and the discharge pressure chamber (Vd) along the movement trajectory of the compression chamber (V), and the compressed refrigerant moves in the discharge pressure chamber (Vd). It is discharged into the discharge space (S12) of the discharge cover (160) through the discharge ports (1411 and 1412).

Then, the refrigerant discharged into the discharge space (S12) of the discharge cover 160 (the refrigerant is mixed with oil to form a mixed refrigerant. However, during the description, it can be used interchangeably as a mixed refrigerant or refrigerant) of the discharge cover 160. It is moved to the discharge space (S12) formed between the main frame 130 and the drive motor 120 through the discharge hole receiving groove 1613 and the first discharge hole 142c of the fixed scroll 140. This mixed refrigerant passes through the drive motor 120 and moves to the upper space (S2) of the casing 110 formed on the upper side of the drive motor 120.

The mixed refrigerant moved to the upper space (S2) is separated into refrigerant and oil in the upper space (S2), and the refrigerant (or some mixed refrigerant in which the oil is not separated) is stored in the casing (110) through the refrigerant discharge pipe (116). It is discharged to the outside and moves to the condenser of the refrigeration cycle.

On the other hand, the oil (or mixed oil mixed with liquid refrigerant) separated from the refrigerant in the upper space (S2) passes through the first oil return passage (Po1) between the inner peripheral surface of the casing (110) and the stator (121) in the lower space ( S1), the oil moving to the lower space (S1) passes through the second oil return passage (Po2) formed between the inner peripheral surface of the casing 110 and the outer peripheral surface of the compressed section, and the oil storage space formed in the lower part of the compressed section ( S11).

This oil is supplied to each bearing surface (not marked) through the oil supply passage 126, and a portion is supplied to the compression chamber (V). The oil supplied to the bearing surface and the compression chamber (V) is discharged to the discharge cover 160 together with the refrigerant and a series of recovery processes are repeated.

In order to prevent the inflow of conventional foreign substances, when installing the mesh part 52a in the refrigerant suction pipe 50, as foreign substances accumulate, the mesh part 52a falls off without being able to withstand its own weight and flows into the compression unit, causing the compression unit to be compressed. There was a problem with damage.

In the present invention, a foreign matter inflow prevention structure 51 is provided in the refrigerant suction pipe 50, and the foreign matter inflow prevention structure 51 includes a mesh portion 52a that prevents the foreign matter from flowing downward, and the mesh A foreign matter blocking portion 52 having a coupling end 52b formed to be bent at one end of the portion 52a, and a coupling receiving portion open at the top to accommodate the coupling end 52b, It includes a fixing part 53 fixedly installed inside the refrigerant suction pipe 50.

For this reason, the scroll compressor 10 of the present invention has a structure in which a foreign matter blocking portion 52 having a mesh portion 52a and a coupling end 52b, and a structure in which the top is opened to accommodate and couple the coupling end 52b. As a result, the fixing force and support force with which the mesh portion 52a is fixed to the fixing portion 53 are improved.

The scroll compressor 10 described above is not limited to the configuration and method of the embodiments described above, and the embodiments may be configured by selectively combining all or part of each embodiment so that various modifications can be made.

It is obvious to those skilled in the art that the present invention can be embodied in other specific forms without departing from the spirit and essential features of the present invention. Accordingly, the above detailed description should not be construed as restrictive in all respects and should be considered illustrative. The scope of the present invention should be determined by reasonable interpretation of the appended claims, and all changes within the equivalent scope of the present invention are included in the scope of the present invention.

10: Scroll compressor
50: Refrigerant suction pipe
110: Casing 115: Refrigerant inlet pipe
116: Refrigerant discharge pipe 110a: Internal space
120: Driving part
125: Rotation axis 1251: Main axis part
1252: first bearing part 1254: eccentric part
1253: fixed bearing part 172: fixed bearing
V: compression chamber
130: Main frame 131: Frame light plate part
132: Frame side wall portion 133: Main bearing receiving portion
133a: Main bearing hole
312a: first bearing hole
150: Swivel scroll 151: Swivel head plate
152: Swivel lap
140: Fixed scroll 141: Fixed light plate part
142: Fixed side wall portion
51, 251: Structure to prevent foreign substances from entering
52: Foreign matter blocking portion 52a: Mesh portion 52b: Joint end portion
53: fixing part 53a: fixing ring 53b: coupling receiving part
55, 56: Support member
55a: support ring 55a-1: protrusion
50a: Groove 55b: Cross support
56a: Structure 56b: Fixed portion 56c: Connected portion

Claims (11)

A casing whose internal space is sealed;
a driving unit including a stator fixed to the internal space and a rotor rotated inside the stator;
a rotating shaft rotatably coupled to the rotor;
a compression unit including an orbiting scroll installed to be capable of orbiting on the rotation shaft and a fixed scroll coupled to the orbiting scroll to form a compression chamber between the orbiting scrolls; and
It includes a refrigerant suction pipe coupled to the casing to enable provision of refrigerant to the compression chamber,
The refrigerant suction pipe is provided with a foreign matter inflow prevention structure installed inside to filter out foreign matter flowing in with the refrigerant,
The structure to prevent foreign matter from entering is,
a foreign matter blocking unit including a mesh part that prevents the foreign matter from flowing downward, and a coupling end formed to be bent at one end of the mesh part; and
It has a coupling accommodating part that is open at the top to accommodate the coupling end, and includes a fixing part fixedly installed on the inside of the refrigerant suction pipe,
A scroll compressor wherein the fixing part has an open upper side and a curved other side.
delete A casing whose internal space is sealed;
a driving unit including a stator fixed to the internal space and a rotor rotated inside the stator;
a rotating shaft rotatably coupled to the rotor;
a compression unit including an orbiting scroll installed to be capable of orbiting on the rotation shaft and a fixed scroll coupled to the orbiting scroll to form a compression chamber between the orbiting scrolls; and
It includes a refrigerant suction pipe coupled to the casing to enable provision of refrigerant to the compression chamber,
The refrigerant suction pipe is provided with a foreign matter inflow prevention structure installed inside to filter out foreign matter flowing in with the refrigerant,
The structure to prevent foreign matter from entering is,
a foreign matter blocking unit including a mesh part that prevents the foreign matter from flowing downward, and a coupling end formed to be bent at one end of the mesh part; and
It has a coupling accommodating part that is open at the top to accommodate the coupling end, and includes a fixing part fixedly installed on the inside of the refrigerant suction pipe,
The refrigerant suction pipe is,
A scroll compressor further comprising a support member disposed to be spaced apart from the bottom of the foreign matter inflow prevention structure and supporting the mesh part to block inflow of the mesh part into the compressed part when the mesh part is separated from the fixing part.
According to paragraph 3,
The support member is,
A support ring coupled to the inner circumference of the refrigerant suction pipe; and
A scroll compressor comprising a plurality of cross support parts provided on the support ring to cross each other and supporting the separated mesh part.
According to paragraph 4,
The support ring has a protrusion protruding in the radial direction,
A scroll compressor wherein the refrigerant suction pipe has a groove portion that is concave to coupleably receive the protrusion portion.
According to paragraph 3,
The support member is formed with a predetermined thickness and is formed by connecting a plurality of polygonal structures to each other.
According to paragraph 1,
The coupling end is a scroll compressor disposed on the inner periphery of the fixing part to face the inside of the foreign matter inflow prevention structure.
According to paragraph 1,
A scroll compressor wherein the mesh portion has a narrower width from top to bottom.

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