KR20220033074A - Scroll compressor - Google Patents

Abstract

The present invention relates to a scroll compressor. A housing comprises an orbiting scroll and a stationary scroll therein. The stationary scroll includes a discharge port for discharging a refrigerant in a compression chamber. The housing includes a rear housing having a discharge chamber accommodating the refrigerant discharged from the discharge port. A discharge plate is formed between the stationary scroll and the rear housing, is fixed by compression by the stationary scroll and the rear housing, seals a space between the stationary scroll and the rear housing, and opens and closes the discharge port. Accordingly, the number of parts and the number of manufacturing processes can be reduced, thereby reducing a manufacturing cost and possibility of occurrence of quality problems. In addition, a design freedom degree can be increased, and possibility of leakage can be reduced.

Description

Scroll Compressor {SCROLL COMPRESSOR}

The present invention relates to a scroll compressor, and more particularly, to a scroll compressor capable of compressing a refrigerant using a fixed scroll and an orbiting scroll.

In general, an air conditioning device (Air Conditioning; A/C) for heating and cooling an interior is installed in a vehicle. Such an air conditioner includes a compressor that compresses a low-temperature, low-pressure gaseous refrigerant introduced from an evaporator into a high-temperature and high-pressure gaseous refrigerant and sends it to a condenser as a configuration of a cooling system.

There are two types of compressors: a reciprocating type for compressing a refrigerant according to a reciprocating motion of a piston, and a rotary type for performing compression while rotating. The reciprocating type includes a crank type that transmits to a plurality of pistons using a crank depending on the transmission method of the drive source, and a swash plate type that transmits to a rotating shaft with a swash plate installed. There is a scroll type using orbiting scroll and fixed scroll.

Scroll compressors are widely used for refrigerant compression in air conditioners because of their advantages in that they can obtain a relatively high compression ratio compared to other types of compressors and achieve stable torque by smoothly connecting refrigerant suction, compression, and discharge strokes.

1 is a cross-sectional view illustrating a conventional scroll compressor, and FIG. 2 is a perspective view illustrating a fixed scroll in the scroll compressor of FIG. 1, in which a discharge valve, a valve retainer, and a sealing member are mounted; FIG. 1 is a perspective view illustrating the rear housing of the scroll compressor of FIG. 1 , and is a perspective view illustrating a state in which the sealing member of FIG. 2 is mounted.

1 to 3 , a conventional scroll compressor includes a housing 100 , a motor 200 provided in the housing 100 , and a rotation shaft 300 rotated by the motor 200 . , an orbiting scroll 400 pivoted by the rotation shaft 300 and a fixed scroll 500 fixed to the housing 100 and meshed with the orbiting scroll 400 to form a compression chamber S2 .

The housing 100 includes a center housing 110 , a front housing 120 coupled to the center housing 110 , and the center housing 110 from the opposite side of the front housing 120 with respect to the center housing 110 . ) includes a rear housing 130 fastened to the.

The motor 200 is provided in a space formed by the front housing 120 and the center housing 110 .

The rotation shaft 300 passes through the center housing 110 and extends from the motor 200 toward the rear housing 130 .

The fixed scroll 500 is provided in a space formed by the rear housing 130 and the center housing 110 , and the orbiting scroll 400 is disposed in the fixed scroll 500 and the center housing 110 . provided in the space formed by

Here, the fixed scroll 500 includes a discharge port 540 for discharging the refrigerant from the compression chamber S2, and the rear housing 130 includes a discharge chamber for receiving the refrigerant discharged from the discharge port 540 ( S3), the discharge valve 610 for opening and closing the discharge port 540 and the valve retainer 620 for limiting the amount of opening of the discharge valve 610 are connected by a fastening bolt 630 to the fixed scroll 500 ) is fixed to

A sealing member 640 for sealing the discharge chamber S3 is interposed between the fixed scroll 500 and the rear housing 130 .

Meanwhile, the rear housing 130 includes an oil separation chamber S4 through which the refrigerant of the discharge chamber S3 flows and a first oil recovery passage 138 through which the oil separated from the refrigerant in the oil separation chamber S4 flows. Further, the fixed scroll 500 further includes a second oil return passage 560 communicating with the first oil return passage 138, and the sealing member 640 includes the first oil return passage ( A sealing opening 642 surrounding the communication portion between the 138 and the second oil recovery passage 560 is included.

In the conventional scroll compressor according to this configuration, when power is applied to the motor 200 , the rotating shaft 300 is rotated by the motor 200 , and the orbiting scroll 400 receives a rotational force from the rotating shaft 300 . is transmitted and rotated, and the volume of the compression chamber S2 is reduced while continuously moving toward the center side. Then, the refrigerant flows into the compression chamber (S2), is compressed while moving toward the center along the movement path of the compression chamber (S2), and is discharged to the discharge chamber (S3).

However, in such a conventional scroll compressor, as the discharge valve 610, the valve retainer 620, the fastening bolt 630 and the sealing member 640 are respectively formed and then assembled with each other, the number of parts increases and As the number of manufacturing processes increases, manufacturing cost increases, and there is a problem in that the possibility of quality problems is high.

In addition, as the space required for the discharge valve 610 , the valve retainer 620 , the fastening bolt 630 , and the sealing member 640 increases, there is a problem in that the degree of freedom in design is reduced.

In addition, as the size of the sealing opening 642 is formed to be larger than the size of the communication portion, the sealing area is increased, and there is a problem in that the possibility of leakage is high.

Republic of Korea Patent Publication No. 10-2020-0090376

Accordingly, an object of the present invention is to provide a scroll compressor capable of reducing the number of parts and the number of manufacturing processes, thereby reducing manufacturing cost and reducing the possibility of quality problems.

Another object of the present invention is to provide a scroll compressor capable of increasing design freedom.

Another object of the present invention is to provide a scroll compressor capable of reducing the sealing area and thus reducing the possibility of leakage.

The present invention, to achieve the object as described above, the housing; a motor provided inside the housing; a rotating shaft rotated by the motor; orbiting scroll rotated by the rotation shaft; and a fixed scroll forming a compression chamber together with the orbiting scroll, wherein the fixed scroll includes a discharge port for discharging the refrigerant from the compression chamber, and the housing includes a discharge chamber for accommodating the refrigerant discharged from the discharge port. a discharge plate is formed between the fixed scroll and the rear housing, wherein the discharge plate is fixed between the fixed scroll and the rear housing by compression by the fixed scroll and the rear housing to seal the space between the fixed scroll and the rear housing and open and close the discharge port A scroll compressor is provided.

The discharge plate may include a compression part compressed by the fixed scroll and the rear housing, and a lead part extending from the pressing part and opening and closing the discharge port, and the compression part and the lead part may be integrally formed.

The fixed scroll includes a disk-shaped fixed scroll head and a fixed scroll wrap protruding from the fixed scroll head toward the orbiting scroll, wherein the fixed scroll head includes a lower surface of the fixed scroll end facing the fixed scroll wrap and the fixed scroll head a fixed scroll head plate upper surface constituting a lower surface of the fixed scroll head plate, wherein the outlet is formed in a central portion of the upper surface of the fixed scroll head plate, and the outer periphery of the fixed scroll head plate upper surface is engraved from the fixed scroll head plate upper surface, and the pressing part is inserted A discharge plate insertion groove is formed, and the rear housing further includes an annular wall facing the discharge plate insertion groove, and the axial thickness of the compression part is greater than an axial distance between the discharge plate insertion groove and the annular wall, or can be formed in the same way.

The crimping part includes a first crimping part connected to the lead part and a second crimping part extending from the first crimping part and surrounding the lead part, and the discharge plate insertion groove is a first groove part into which the first crimping part is inserted. and a second groove part into which the second compression part is inserted.

The first crimping part includes a first crimping part upper surface contacting the annular wall and a first crimping part lower surface forming a rear surface of the first crimping part upper surface, and the first groove part being in contact with the first crimping part lower surface Including a bottom surface of the first groove, the second pressing portion includes a second pressing portion upper surface in contact with the annular wall and a second pressing portion lower surface forming a rear surface of the second pressing portion upper surface, the second groove portion is the It may include a bottom surface of the second groove part in contact with the lower surface of the second compression part.

The first groove base surface and the second groove base surface are formed on a first plane, the front end surface of the annular wall is formed on a second plane parallel to the first plane, the lower surface of the first pressing part and the A lower surface of the second compression part is formed on a third plane, and an upper surface of the first compression part and an upper surface of the second compression part are formed on a fourth plane parallel to the third plane, and before the discharge plate is compressed When the distance between the third plane and the fourth plane is greater than the distance between the first plane and the second plane, and the discharge plate is compressed, the third plane becomes the same as the first plane, and the fourth plane becomes the The distance between the third plane and the fourth plane may be equal to the distance between the first plane and the second plane by being equal to the second plane.

The first crimping unit further includes a first crimping part outer circumferential surface bent from an outer periphery of a lower surface of the first crimping part and a first crimping part inner circumferential surface bent from an inner periphery of a lower surface of the first crimping part, and the second crimping part is the A second crimping part outer circumferential surface bent from the outer periphery of the lower surface of the second crimping part and a second crimping part inner circumferential surface bent from the inner periphery of the second crimping part lower surface, wherein the first groove portion is on the outer circumferential surface of the first crimping part A first side of the first groove in contact with the first side and a second side of the first groove in contact with the inner circumferential surface of the first crimping unit, wherein the second groove comprises a first side of the second groove in contact with the outer circumferential surface of the second crimping unit; A second side surface of the second groove portion in contact with the inner circumferential surface of the second compression portion may be further included.

The lead part includes a lower surface of the lead part opposite to the center of the upper surface of the fixed scroll mirror plate, a step surface is formed between the lower surface of the lead part and a lower surface of the first compression part, and the second side surface of the first groove part is the step surface It may include a support surface for supporting the.

A radial distance between the outer circumferential surface of the first crimping unit and the inner circumferential surface of the first crimping unit may be greater than a radial distance between the second crimping unit outer circumferential surface and the inner circumferential surface of the second crimping unit.

The rear housing further includes an oil separation chamber into which the refrigerant of the discharge chamber flows, and a first oil recovery passage through which oil separated from the refrigerant in the oil separation chamber flows, and the fixed scroll communicates with the first oil recovery passage. a second oil recovery passage, wherein the first compression part includes a sealing opening surrounding a communication portion between the first oil return passage and the second oil recovery passage, the size of the sealing opening being that of the communication portion It can be formed in size and so on level.

The discharge plate insertion groove includes a pipe part protruding from the base surface of the first groove part and extending to the rear housing through the sealing opening, and having the second oil return flow path therein, and the inner diameter of the sealing opening is the pipe part It can be formed at a level equivalent to the outer diameter.

The rear housing may further include a post part protruding toward the lid part, and the post part may include a retainer surface that contacts the lid part when the lid part opens the discharge port to limit an opening amount of the lid part.

The retainer surface may be formed to be in surface contact with the lead part.

The retainer surface may be inclined.

The post part may further include a groove formed to be engraved from the retainer surface.

A scroll compressor according to the present invention comprises: a housing; a motor provided inside the housing; a rotating shaft rotated by the motor; orbiting scroll rotated by the rotation shaft; and a fixed scroll forming a compression chamber together with the orbiting scroll, wherein the fixed scroll includes a discharge port for discharging the refrigerant from the compression chamber, and the housing includes a discharge chamber for accommodating the refrigerant discharged from the discharge port. a discharge plate is formed between the fixed scroll and the rear housing, wherein the discharge plate is fixed between the fixed scroll and the rear housing by compression by the fixed scroll and the rear housing to seal the space between the fixed scroll and the rear housing and open and close the discharge port can be Accordingly, as the discharge plate replaces the conventional discharge valve, the valve retainer, the fastening bolt, and the sealing member, the number of parts and the number of manufacturing processes is reduced, thereby reducing manufacturing cost and reducing the possibility of occurrence of quality problems.

In addition, as the required space of the discharge plate is smaller than the required space of the conventional discharge valve, the valve retainer, the fastening bolt, and the sealing member, the degree of freedom in design may be increased.

In addition, as the size of the sealing opening of the discharge plate is formed to be equal to the size of the communication portion between the oil recovery passages, the sealing area is reduced, thereby reducing the possibility of leakage.

1 is a cross-sectional view showing a conventional scroll compressor;
FIG. 2 is a perspective view illustrating a fixed scroll in the scroll compressor of FIG. 1, in which a discharge valve, a valve retainer, and a sealing member are mounted;
3 is a perspective view showing the rear housing of the scroll compressor of FIG. 1, and is a perspective view showing a state in which the sealing member of FIG. 2 is mounted;
4 is a perspective view illustrating a fixed scroll in a scroll compressor according to an embodiment of the present invention, showing a state in which a discharge plate is mounted;
Figure 5 is an exploded perspective view of Figure 4;
Figure 6 is a perspective view showing the rear surface of the discharge plate of Figure 5;
7 is an enlarged perspective view of the step surface in the discharge plate of FIG. 6;
8 is a perspective view showing the rear housing of the scroll compressor of FIG. 4, showing a state in which the discharge plate is mounted;
9 is a perspective view showing a retainer surface of a post part in the rear housing of FIG. 8;
FIG. 10 is a perspective view illustrating the retainer surface of FIG. 9 from a different angle, and is a perspective view showing a portion of the rear housing cut away to show an inclination of the retainer surface;

Hereinafter, a scroll compressor according to the present invention will be described in detail with reference to the accompanying drawings.

4 is a perspective view illustrating a fixed scroll in a scroll compressor according to an embodiment of the present invention, in which a discharge plate is mounted, FIG. 5 is an exploded perspective view of FIG. 4 , and FIG. 6 is the discharge of FIG. It is a perspective view showing the rear side of the plate, FIG. 7 is an enlarged perspective view of the stepped surface of the discharge plate of FIG. 6 , and FIG. 8 is a perspective view showing the rear housing of the scroll compressor of FIG. 4 in a state in which the discharge plate is mounted is a perspective view showing the retainer surface of the post part in the rear housing of FIG. 8, and FIG. 10 is a perspective view showing the retainer surface of FIG. 9 from another angle to show the inclination of the retainer surface. It is a perspective view showing a part of the housing cut off.

Meanwhile, components not shown in FIGS. 4 to 10 refer to FIG. 1 for convenience of description.

4 to 10 and 1, the scroll compressor according to an embodiment of the present invention includes a housing 100, a motor 200 for generating rotational force inside the housing 100, and the motor ( 200), the orbiting scroll 400 rotated by the rotating shaft 300, and the housing 100 and meshed with the orbiting scroll 400 to form a compression chamber S2. It may include a fixed scroll 500 to form.

The housing 100 includes a center housing 110 , a front housing 120 that is fastened to the center housing 110 and forms a space in which the motor 200 is accommodated, and the front housing 110 with respect to the center housing 110 . A rear housing 130 coupled to the center housing 110 from the opposite side of the housing 120 and forming a space in which the orbiting scroll 400 and the fixed scroll 500 are accommodated may be included.

The center housing 110 divides a space in which the motor 200 is accommodated and a space in which the orbiting scroll 400 and the fixed scroll 500 are accommodated, and the orbiting scroll 400 and the fixed scroll 500 are accommodated. ) may include a main frame 112 supporting the main frame 112 and a center housing side plate 114 protruding from the outer periphery of the main frame 112 toward the front housing 120 .

The main frame 112 is formed in a substantially disk shape, and in the center of the main frame 112 , a shaft hole through which one end of the rotation shaft 300 passes, and the orbiting scroll 400 are directed toward the fixed scroll 500 . A back pressure chamber to pressurize may be formed. Here, an eccentric bush that converts the rotational motion of the rotational shaft 300 into a rotational motion of the orbiting scroll 400 is formed at one end of the rotational shaft 300 , and the back pressure chamber is a space in which the eccentric bush can be rotated can provide

The front housing 120 includes a front housing head plate 122 facing the main frame 112 and supporting the other end of the rotation shaft 300 , and protruding from an outer periphery of the front housing head plate 122 , and the center housing It is coupled to the side plate 114 and may include a front housing side plate 124 supporting the motor 200 .

The rear housing 130 includes a rear housing head plate 132 opposite to the main frame 112 and a rear housing side plate protruding from the outer periphery of the rear housing head plate 132 and fastened to the outer periphery of the main frame 112 ( 134) may be included.

In addition, the rear housing 130 includes a suction chamber S1 accommodating the refrigerant to be introduced into the compression chamber S2 , a discharge chamber S3 accommodating the refrigerant discharged from the compression chamber S2 , and the suction chamber It may further include an annular wall 136 that partitions (S1) and the discharge chamber (S3). Here, the annular wall 136 is formed to protrude in an annular shape from the rear housing head plate 132 toward the fixed scroll 500 (more precisely, a discharge plate insertion groove 550 to be described later), and the discharge chamber S3 ) is formed inside the annular wall 136 in a radial direction, and the suction chamber S1 may be formed outside the annular wall 136 in a radial direction.

In addition, the rear housing 130 includes an oil separation chamber S4 through which the refrigerant of the discharge chamber S3 flows and a first oil recovery passage 138 through which the oil separated from the refrigerant in the oil separation chamber S4 flows. may include more. Here, the outlet of the first oil recovery passage 138 may be formed on the front end surface of the annular wall 136 .

In addition, the rear housing 130 further includes a post part 139 protruding from the inner wall surface of the rear housing head plate 132 toward a lead part 720 to be described later, and the post part 139 is a lead to be described later. It may include a retainer surface 139a contactable with portion 720 .

Here, the retainer surface 139a may be formed to be inclined so as to be in surface contact with the lead portion 720 to be described later. That is, the retainer surface 139a may be formed such that the distance to the upper surface 514 of the fixed scroll head plate 514 decreases toward the first compression part 712 .

In addition, the retainer surface 139a preferably includes a groove 139b engraved from the retainer surface 139a in order to reduce noise and improve durability by reducing a contact area with the lead part 720, which will be described later. can That is, the retainer surface 139a may be preferably formed in a so-called trypan structure.

The motor 200 may include a stator 210 fixed to the front housing side plate 124 and a rotor 220 rotating inside the stator 210 by interaction with the stator 210 . .

The rotation shaft 300 is fastened to the rotor 220 , passes through the central portion of the rotor 220 , one end of the rotation shaft 300 passes through the shaft hole of the main frame 112 , and the rotation shaft 300 ) may be supported by the other end of the front housing head plate 122 .

The orbiting scroll 400 is interposed between the main frame 112 and the fixed scroll 500 , and a disk-shaped orbiting scroll head plate 410 and the fixed scroll 500 from the center of the orbiting scroll head plate 410 . ) may include an orbiting scroll wrap 420 protruding to the side, and an orbiting scroll boss 430 protruding from the center of the orbiting scroll end plate 410 to the opposite side of the orbiting scroll wrap 420 and engaged with the eccentric bush. .

The fixed scroll 500 includes a disk-shaped fixed scroll head plate 510 , a fixed scroll wrap 520 protruding from a center of the fixed scroll head plate 510 and meshing with the orbiting scroll wrap 420 , and the fixed scroll head plate. A fixed scroll side plate 530 protruding from the outer periphery of the 510 and fastened to the main frame 112 and forming a revolving space of the orbiting scroll 400 may be included.

A discharge port 540 for discharging the refrigerant from the compression chamber S2 to the discharge chamber S3 may be formed in a central portion of the fixed scroll head plate 510 .

Here, the fixed scroll head plate 510 forms a lower surface of the fixed scroll head toward the fixed scroll wrap 520 and a lower surface of the fixed scroll head, and an upper surface 514 of the fixed scroll end face toward the discharge chamber S3. The discharge port 540 may be formed through the fixed scroll head plate 510 from a central portion of the lower surface of the fixed scroll head plate to a central portion of the upper surface 514 of the fixed scroll head plate.

In addition, a discharge plate insertion groove 550 formed to be engraved from the fixed scroll head plate upper surface 514 and into which a compression part 710 to be described later is inserted may be formed on the outer periphery of the fixed scroll head plate upper surface 514 .

The discharge plate insertion groove 550 may include a first groove portion 552 into which a first pressing portion 712 to be described later is inserted and a second groove portion 554 into which a second pressing portion 714 to be described later is inserted. there is.

The first groove portion 552 includes a first groove portion base surface 552a in contact with a lower surface 712a of the first pressing portion, which will be described later, and an upper surface 514 of the fixed scroll end plate bent from an outer periphery of the first groove portion base surface 552a. a first groove portion first side surface 552b extending to , the second side surface 552c of the first groove portion may include a support surface 552ca for supporting a stepped surface 712da to be described later.

And, the first groove portion 552 further includes a tube portion 552d protruding from the first groove portion base surface 552a and extending to the rear housing 130 through a sealing opening 716 to be described later, A second oil recovery passage 560 communicating with the outlet of the first oil recovery passage 138 may be formed in the pipe portion 552d.

The second groove portion 554 includes a second groove portion base surface 554a that is in contact with a lower surface 714a of the second pressing portion, which will be described later, and is bent from an outer periphery of the second groove portion base surface 554a and an upper surface 514 of the fixed scroll end plate. a second groove portion first side surface 554b extending to can

Here, the discharge plate insertion groove 550 is a radial distance between the first groove portion first side surface 552b and the first groove portion second side surface 552c so as to correspond to the pressing portion 710 to be described later (first The radial width of the groove portion 552 is formed to be greater than the radial distance (radial width of the second groove portion 554) between the first side surface 554b of the second groove portion and the second side surface 554c of the second groove portion 554 can be

A suction port 532 for guiding the refrigerant in the suction chamber S1 to the compression chamber S2 may be formed in the fixed scroll side plate 530 .

Meanwhile, the fixed scroll 500 and the rear housing 130 are fixed between the fixed scroll 500 and the rear housing 130 by compression by the fixed scroll 500 and the rear housing 130 . A discharge plate 700 for sealing the space and opening and closing the discharge port 540 may be formed.

The discharge plate 700 includes a compression part 710 compressed by the fixed scroll 500 and the rear housing 130 , and a lead part extending from the pressing part 710 and opening and closing the discharge port 540 . 720, and the compression part 710 and the lead part 720 may be integrally formed. Here, being integrally formed may mean being formed as a single unit that is not segmented from the beginning, rather than being separately formed and then assembled with each other.

When the compression part 710 receives the lead part 720 , it is formed in a ring shape, is inserted into the discharge plate insertion groove 550 , and has an annular shape between the fixed scroll end plate 510 and the rear housing 130 . The axial thickness of the compression part 710 may be formed to be greater than or equal to the axial distance between the discharge plate insertion groove 550 and the front end surface of the annular wall 136 so as to be compressed between the walls 136 .

Specifically, the crimping part 710 includes a first crimping part 712 connected to the lead part 720 and a first crimping part 712 connected to the first crimping part 712 in an annular shape and surrounding the lead part 720 . 2 may include a pressing unit 714 .

The first pressing portion 712 forms a rear surface of the first pressing portion upper surface 712b in contact with the front end surface of the annular wall 136 and the first pressing portion upper surface 712b, and the first groove bottom surface 552a ) may include a lower surface (712a) of the first pressing portion in contact with.

In addition, the first crimping part 712 has a distance between the lower surface 712a of the first crimping part and the upper surface 712b of the first crimping part in the state before the crimping, and the bottom surface 552a of the first groove part in the state after crimping. ) and the annular wall 136 may be formed to be larger than the distance between the front end surface.

The second pressing portion 714 forms a second pressing portion upper surface 714b in contact with the front end surface of the annular wall 136 and a rear surface of the second pressing portion upper surface 714b, and the second groove portion base surface 554a ) may include a second pressing portion lower surface (714a) in contact.

In addition, the second crimping part 714 has a distance between the second crimping part lower surface 714a and the second crimping part upper surface 714b in the state before the crimping is the second groove base surface 554a in the after crimping state. ) and the annular wall 136 may be formed to be larger than the distance between the front end surface.

Here, the axial distance between the first groove base surface 552a and the tip surface of the annular wall 136 and the second groove base surface 554a and the annular wall ( The axial distance between the front end surfaces of the 136) is formed to be the same and constant, and the axial distance between the first crimping part lower surface 712a and the first crimping part upper surface 712b (the first crimping part 712) Axial thickness) and the axial distance (axial thickness of the second crimping part 714 ) between the lower surface 714a of the second compression part and the upper surface 714b of the second compression part may be formed to be equal to each other and constant. .

That is, the first groove base surface 552a and the second groove base surface 554a are formed on a first plane, and the front end surface of the annular wall 136 is on a second plane parallel to the first plane. The first crimping part lower surface 712a and the second crimping part lower surface 714a are formed on a third plane, and the first crimping part upper surface 712b and the second crimping part upper surface 714b are formed. It may be formed on a fourth plane parallel to the third plane. The first plane and the second plane are different from each other, and the third plane and the fourth plane are different from each other. And, before the compression part 710 is compressed, the first plane and the third plane are different planes from each other, the second plane and the fourth plane are different planes, and the third plane and the third plane are different from each other. A distance between the 4 planes may be greater than a distance between the first plane and the second plane. On the other hand, when the compression part 710 is compressed, the third plane becomes the same as the first plane, the fourth plane becomes the same as the second plane, and the distance between the third plane and the fourth plane is may be reduced to be equal to the distance between the first plane and the second plane.

On the other hand, the first crimping part 712 includes a first crimping part outer circumferential surface 712c bent from the outer periphery of the first crimping part lower surface 712a and a first crimping part bent from the inner periphery of the first crimping part lower surface 712a. 1 may further include an inner circumferential surface 712d of the compression part.

The outer circumferential surface 712c of the first compression part may extend to the upper surface 712b of the first compression part, and at least a portion may be in contact with the first side surface 552b of the first groove part.

A portion of the inner circumferential surface 712d of the first compression part may be formed as a stepped surface 712da extending to a lower surface 722 of the lead part, which will be described later, and may be in contact with the support surface 552ca.

The rest of the inner circumferential surface of the first compression part 712d is formed to extend to the upper surface 712b of the first compression part, and at least a portion of the first groove part second side surface 552c is on a portion except for the support surface 552ca. can be contacted.

In addition, the second compression part 714 is a second compression part outer peripheral surface 714c and the second compression part bent from the outer periphery of the second pressing part lower surface 714a and extending to the second compression part upper surface 714b. It may further include a second compression portion inner peripheral surface (714d) bent from the inner peripheral portion of the lower surface of the second compression portion extending to the upper surface (714b) of the second compression portion. And, at least a portion of the second crimping portion outer peripheral surface 714c is in contact with the second groove portion first side surface 554b, and at least a portion of the second pressing portion inner peripheral surface 714d is the second groove portion second side surface ( 554c).

Here, a radial distance between the outer circumferential surface of the first crimping part 712c and the inner circumferential surface of the first crimping part 712d so that the support rigidity of the lead part 720 by the first crimping part 712 is improved (first 1 The radial width of the crimping part 712 is greater than the radial distance (radial width of the second crimping part 714 ) between the second crimping part outer circumferential surface 714c and the second crimping part inner circumferential surface 714d can be formed.

On the other hand, the first compression part 712 further includes a sealing opening 716 surrounding a communication portion between the first oil return passage 138 and the second oil return passage 560, and the sealing opening ( 716) may be formed at the same level as the size of the communication region. That is, as in the present embodiment, when the pipe portion 552d having the second oil recovery passage 560 is provided, the inner diameter of the sealing opening 716 is formed at the same level as the outer diameter of the tube portion 552d. can be

The lead part 720 may be formed in a cantilever shape extending from the first compression part 712 toward the center of the compression part 710 .

The lead part 720 forms a center of the upper surface 514 of the fixed scroll head plate, a lower surface 722 of the lid part opposite to the discharge port 540, and a rear surface of the lower surface 722 of the lid part, and forms the rear housing head plate 132. ) and a lead part upper surface 724 opposite to the post part 139 .

The lower surface 722 of the lead part is formed on the rear housing 130 side with respect to the lower surface 712a of the first crimping part, and is formed between the lower surface of the lead part 722 and the lower surface 712a of the first crimping part. The stepped surface 712da may be formed.

The upper surface 724 of the lead part may be formed on the same plane as the upper surface 712b of the first compression part and the upper surface 714b of the second compression part.

Hereinafter, the effect of the scroll compressor according to the present embodiment will be described.

That is, when power is applied to the motor 200 , the rotation shaft 300 may rotate together with the rotor 220 .

In addition, the orbiting scroll 400 may receive rotational force from the rotation shaft 300 through the eccentric bush to perform a rotation movement.

Accordingly, the volume of the compression chamber S2 may be reduced while continuously moving toward the center.

In addition, the refrigerant in the suction chamber S1 may be introduced into the compression chamber S2 through the suction port 532 .

In addition, the refrigerant sucked into the compression chamber S2 may be compressed while moving toward the center along the movement path of the compression chamber S2 and discharged to the discharge chamber S3 through the discharge port 540 .

In addition, the refrigerant discharged to the discharge chamber S3 may pass through the oil separation chamber S4 to be separated from the oil contained therein, and then be discharged to the outside of the housing 100 .

Here, in the scroll compressor according to the present embodiment, the lid part 720 for opening and closing the discharge port 540 is integrally formed with the lid part 720 , and the fixed scroll 500 and the rear housing 130 are formed integrally with each other. Including the discharge plate 700 having the compression portion 710 that is fixed by compression by means of pressing and supports the lid portion 720 and seals between the fixed scroll 500 and the rear housing 130 Accordingly, a single discharge plate 700 may replace the conventional discharge valve 610 , the fastening bolt 630 , and the sealing member 640 . Accordingly, the number of parts and the number of manufacturing processes are reduced, so that the manufacturing cost can be reduced, and the possibility of occurrence of quality problems can be reduced.

And, as the rear housing 130 includes the post portion 139 and the post portion 139 includes the retainer surface 139a, the rigidity of the rear housing head plate 132 is improved as well. Rather, when the lead part 720 opens the discharge port 540 , it may come into contact with the retainer surface 139a to limit the opening amount of the lead part 720 . That is, the post portion 139 may replace the conventional valve retainer 620 . Accordingly, the number of parts and the number of manufacturing processes are further reduced, so that the manufacturing cost can be further reduced, and the possibility of occurrence of quality problems can be further reduced.

And, as the required space of the discharge plate 700 is smaller than the required space of the conventional discharge valve 610 , the valve retainer 620 , the fastening bolt 630 , and the sealing member 640 , the degree of design freedom is increased. can

In addition, as the axial thickness of the pressing part 710 is formed to be greater than or equal to the axial distance between the fixed scroll 500 and the rear housing 130 , the discharge plate 700 is moved to the fixed scroll 500 . ) and the rear housing 130 may be sufficiently compressed and stably supported.

And, the crimping part 710 includes the first crimping part 712 connected to the lead part 720 and the second crimping part 714 extending from the first crimping part 712, As the axial thickness of the first crimping part 712 and the axial thickness of the second crimping part 714 are equal to each other and are formed to be constant, the crimping part 710 may be compressed evenly as a whole.

In addition, as the radial width of the first compression part 712 is formed to be larger than the radial width of the second compression part 714 , the support rigidity of the lead part 720 may be improved.

In addition, the discharge plate insertion groove 550 is provided, and the first crimping part outer circumferential surface 712c, the first crimping part inner circumferential surface 712d, the second crimping part outer circumferential surface 714c, and the second crimping part inner circumferential surface 714d is in contact with the first groove portion first side surface 552b, the first groove portion second side surface 552c, the second groove portion first side surface 554b, and the second groove portion second side surface 554c Accordingly, it is possible to prevent the discharge plate 700 from being separated from the predetermined position in the radial and circumferential directions. That is, the discharge plate 700 may be supported more stably.

In addition, the inner circumferential surface 712d of the first compression part includes the stepped surface 712da, and the second side surface 552c of the first groove includes the support surface 552ca supporting the stepped surface 712da. Accordingly, the portion on which the load is greatly applied according to the deformation of the lead part 720 is supported in the radial and circumferential directions, so that the discharge plate 700 can be supported more stably.

In addition, the sealing opening 716 is formed in the first pressing part 712 , and the first groove part 552 includes the pipe part 552d inserted into the sealing opening 716 , so that the discharge The plate 700 may also be supported by the tube portion 552d in radial and circumferential directions.

In addition, the second oil return passage 560 communicating with the first oil return passage 138 is formed in the pipe portion 552d, and the inner diameter of the sealing opening 716 is the same as the outer diameter of the tube portion 552d. As they are formed at the same level, the size of the sealing opening 716 may be formed at the same level as the size of the communication portion between the first oil return passage 138 and the second oil return passage 560 . Accordingly, the sealing area is reduced, and the possibility of leakage can be reduced.

And, as the retainer surface 139a is formed to be inclined, the retainer surface 139a and the lead part 720 come into surface contact with each other, so that noise and damage between the lead part 720 and the post part 139 are made. is reduced, and durability of the lead part 720 and the post part 139 may be improved.

Further, as the groove 139b is formed in the retainer surface 139a, noise and damage between the lead part 720 and the post part 139 are further reduced, and the lead part 720 and the post part 139 are further reduced. The durability of the part 139 may be further improved.

Meanwhile, the scroll compressor according to the present embodiment is based on the premise that the fixed scroll 500 is accommodated in the housing 100 , but is not limited thereto. That is, although not shown separately, the fixed scroll is exposed to the outside of the housing, the annular rear housing side plate may be fastened to the outer periphery of the fixed scroll, and in this case, the discharge plate may be compressed between the fixed scroll outer periphery and the rear housing side plate. .

100: housing 130: rear housing
136: annular wall 138: first oil return flow path
139: post portion 139a: retainer face
139b: groove 200: motor
300: rotation axis 400: orbiting scroll
500: fixed scroll 510: fixed scroll end plate
514: fixed scroll head plate upper surface 520: fixed scroll wrap
540: discharge port 550: discharge plate insertion groove
552: first groove 552a: first groove base surface
552b: first groove portion first side 552c: first groove portion second side
552ca: support surface 552d: pipe
554: second groove portion 554a: second groove portion base surface
554b: second groove first side 554c: second groove second side
560: second oil return flow path 700: discharge plate
710: crimping unit 712: first crimping unit
712a: lower surface of the first crimping unit 712b: upper surface of the first crimping unit
712c: outer circumferential surface of the first crimping unit 712d: inner circumferential surface of the first crimping unit
712da: stepped surface 714: second crimping portion
714a: second crimping unit lower surface 714b: second crimping unit upper surface
714c: outer circumferential surface of the second crimping unit 714d: inner circumferential surface of the second crimping unit
716: sealing opening 720: lead part
722: when the lead part S1: suction chamber
S2: compression chamber S3: discharge chamber
S4: Oil separation chamber

Claims (15)

housing;
a motor provided inside the housing;
a rotating shaft rotated by the motor;
orbiting scroll rotated by the rotation shaft; and
Including; and a fixed scroll forming a compression chamber together with the orbiting scroll;
The fixed scroll includes a discharge port for discharging the refrigerant in the compression chamber,
The housing includes a rear housing having a discharge chamber for accommodating the refrigerant discharged from the discharge port,
and a discharge plate fixed between the fixed scroll and the rear housing by compression by the fixed scroll and the rear housing, sealing the space between the fixed scroll and the rear housing, and opening and closing the discharge port. According to claim 1,
The discharge plate includes a compression part compressed by the fixed scroll and the rear housing, and a lead part extending from the pressing part and opening and closing the discharge port,
A scroll compressor in which the compression part and the lead part are integrally formed. 3. The method of claim 2,
The fixed scroll includes a disk-shaped fixed scroll end plate and a fixed scroll wrap protruding from the fixed scroll end plate toward the orbiting scroll,
The fixed scroll head plate includes a lower surface of the fixed scroll head facing toward the fixed scroll wrap and an upper surface of the fixed scroll head forming a rear surface of the lower surface of the fixed scroll head;
The discharge port is formed in the center of the upper surface of the fixed scroll end plate,
A discharge plate insertion groove formed to be engraved from the upper surface of the fixed scroll head plate and into which the pressing part is inserted is formed on an outer periphery of the upper surface of the fixed scroll head plate;
The rear housing further includes an annular wall facing the discharge plate insertion groove,
and an axial thickness of the compression part is greater than or equal to an axial distance between the discharge plate insertion groove and the annular wall. 4. The method of claim 3,
The crimping part includes a first crimping part connected to the lead part and a second crimping part extending from the first crimping part and surrounding the lead part,
The discharge plate insertion groove includes a first groove into which the first compression part is inserted and a second groove part into which the second compression part is inserted. 5. The method of claim 4,
The first compression part includes a first pressing part lower surface forming a rear surface of the first pressing part upper surface and the first pressing part upper surface in contact with the annular wall,
The first groove portion includes a bottom surface of the first groove portion in contact with the lower surface of the first compression portion,
The second crimping unit includes a second crimping unit upper surface in contact with the annular wall and a second crimping unit lower surface forming a rear surface of the second crimping unit upper surface,
and the second groove portion includes a bottom surface of the second groove portion contacting a lower surface of the second compression portion. 6. The method of claim 5,
The first groove base surface and the second groove base surface are formed on a first plane,
The front end surface of the annular wall is formed on a second plane parallel to the first plane,
A lower surface of the first pressing unit and a lower surface of the second pressing unit are formed on a third plane,
An upper surface of the first pressing unit and an upper surface of the second pressing unit are formed on a fourth plane parallel to the third plane,
Before the discharge plate is compressed, the distance between the third plane and the fourth plane is greater than the distance between the first plane and the second plane,
When the discharge plate is compressed, the third plane becomes equal to the first plane and the fourth plane becomes equal to the second plane, so that the distance between the third plane and the fourth plane is equal to the first plane and the second plane A scroll compressor equal to the distance between the planes. 6. The method of claim 5,
The first compression part further comprises a first compression part outer peripheral surface bent from the outer periphery of the lower surface of the first compression part and a first compression part inner peripheral surface bent from the inner periphery of the first pressing part lower surface,
The second crimping unit further includes a second crimping part outer circumferential surface bent from the outer periphery of the second crimping part lower surface and a second crimping part inner circumferential surface bent from the inner periphery of the second crimping part lower surface,
The first groove portion further includes a first side surface of the first groove in contact with the outer peripheral surface of the first compression part and a second side surface of the first groove part in contact with the inner peripheral surface of the first compression part,
The second groove portion further includes a first side surface of the second groove portion in contact with an outer circumferential surface of the second compression unit and a second side surface of the second groove portion contacting an inner circumferential surface of the second compression portion. 8. The method of claim 7,
The lead part includes a lower surface of the lead part opposite to the center of the upper surface of the fixed scroll head plate,
A step surface is formed between the lower surface of the lead part and the lower surface of the first crimping part,
and a second side surface of the first groove portion includes a support surface supporting the stepped surface. 8. The method of claim 7,
and a radial distance between an outer circumferential surface of the first crimping unit and an inner circumferential surface of the first crimping unit is greater than a radial distance between an outer circumferential surface of the second crimping unit and an inner circumferential surface of the second crimping unit. 6. The method of claim 5,
The rear housing further includes an oil separation chamber into which the refrigerant of the discharge chamber flows and a first oil recovery passage through which oil separated from the refrigerant in the oil separation chamber flows,
The fixed scroll further includes a second oil recovery passage communicating with the first oil recovery passage,
The first compression part includes a sealing opening surrounding a communication portion between the first oil recovery passage and the second oil recovery passage,
The size of the sealing opening is formed at the same level as the size of the communication portion. 11. The method of claim 10,
The discharge plate insertion groove includes a pipe portion protruding from the base surface of the first groove portion and extending to the rear housing through the sealing opening and having the second oil return passage therein;
An inner diameter of the sealing opening is formed to be equal to an outer diameter of the tube portion. 3. The method of claim 2,
The rear housing further includes a post portion protruding toward the lead portion,
and a retainer surface in contact with the lid part when the lid part opens the discharge port to limit an opening amount of the lid part. 13. The method of claim 12,
The retainer surface is formed to be in surface contact with the lid part. 14. The method of claim 13,
The retainer surface is formed to be inclined. 14. The method of claim 13,
The scroll compressor further comprising a groove formed to be engraved from the retainer surface.

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